EP3333640A1 - Running time equation mechanism controlled by a differential device - Google Patents

Running time equation mechanism controlled by a differential device Download PDF

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Publication number
EP3333640A1
EP3333640A1 EP17151406.0A EP17151406A EP3333640A1 EP 3333640 A1 EP3333640 A1 EP 3333640A1 EP 17151406 A EP17151406 A EP 17151406A EP 3333640 A1 EP3333640 A1 EP 3333640A1
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EP
European Patent Office
Prior art keywords
time
satellite
civil
equation
true
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17151406.0A
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German (de)
French (fr)
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EP3333640B1 (en
Inventor
Sylvain Dauby
Alain Zaugg
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Montres Breguet SA
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Montres Breguet SA
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Priority to CN201711274187.4A priority Critical patent/CN108181797B/en
Publication of EP3333640A1 publication Critical patent/EP3333640A1/en
Priority to HK18115039.1A priority patent/HK1255965A1/en
Application granted granted Critical
Publication of EP3333640B1 publication Critical patent/EP3333640B1/en
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    • G04B13/026—
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/23—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands

Definitions

  • the present invention relates to a walking time equation mechanism for a timepiece. More specifically, the invention relates to a walking time equation mechanism driving a minute hand of the true time concentric to an hour hand.
  • some timepieces include, in addition to the hand which indicates the minute of the civil time, a so-called time equation mechanism which includes a needle which moves next to a graduated scale to indicate the difference between the minute of the civil time and the minute of the solar time for a given day.
  • This minute hand of the true time is actuated by a weather equation cam whose profile is determined by the difference between the mean solar time and the true solar time for all the days of the year.
  • the turnout of a timepiece equipped with a walking time equation mechanism comprises two concentric minute hands, one indicating the minute of the civil time, and the other indicating the minute of the true time.
  • the difference between the minute hand of the civil time and the minute hand of the true time is determined by the difference between the mean solar time and the true solar time for the day of the year considered.
  • the minute hand of the true time of a walking equation mechanism is actuated by a time equation cam.
  • the equation of time cam is rotated at the rate of one revolution per year from a date mechanism that can be simple or perpetual.
  • the simple calendar is a mechanism arranged to indicate the day of the week, the day of the month, the month of the year or the phases of the Moon, but which does not take into account the variation of the number of days in the month. (months of 28, 29 or 30 days).
  • the user of a watch having a simple date mechanism will have to perform a manual correction every month ends that are less than 31 days. For example, February 28 or April 30 will require manual intervention.
  • the perpetual calendar mechanism it allows, as a simple date mechanism, to indicate the day, the date, the month and the phases of the Moon. But unlike a simple date mechanism, a perpetual calendar mechanism automatically takes into account the length of the months (28, 29 and 30 days), without manual intervention. A perpetual calendar mechanism therefore automatically takes into account leap years.
  • Equation cam of time 1 whose profile is determined by the difference, for each day of the year, between the mean solar time or civil time and the true solar time.
  • This equation of time 1 cam is rotated at a rate of one revolution per year from a simple or perpetual calendar mechanism that includes the timepiece.
  • Equation cam of time 1 carries a disc of months 2 which rotates at the same speed as it and which makes it possible to make coincide the position of this equation cam of time 1 with the date indicated by the date mechanism so that the minute hand of solar time 4 indicates the exact offset between the minute of the civil time and the minute of the solar time.
  • the date mechanism simple or perpetual, can be of any known type and will not be described here in its entirety. For a good understanding, it suffices to know that this date mechanism drives the equation cam of time 1 at the rate of one complete revolution per year. However, it is shown for illustrative purposes only a date mobile 6 driving a needle 8 which indicates the date (1 to 31). This mobile date of 6 rotates at a rate of one complete turn per month. It is actuated by the date mechanism and drives the time equation cam 1 via an intermediate date wheel 10 which makes it possible to reverse the direction of rotation, and a reduction wheel 12 which makes it possible to reduce the speed of rotation. rotation of one full turn per month to one full turn per year.
  • the minute hand of the solar time 4 is driven by a differential gear device 14 which has respective inputs a gear train driving a minute hand of the civil time 18, and a rake 20 which cooperates with the time equation cam 1 (on the figure 1 , the rake 20 is represented in its two extreme positions, once in solid line, and the other time in dotted lines). More precisely, as is visible on the figure 1 , the differential gear device 14 comprises at least one and, preferably, two planet gears 22 driven by the timer of the watch movement of the watch. These two planet gears 22 are able to turn on themselves and to roll on the internal toothing 24 of an equation wheel of time 26.
  • the latter also has on its outer periphery a first toothed sector 28 by which it co-operates with a second toothed sector 30 which is provided with the rake 20 at one of its ends.
  • This rake 20 is subjected to the return action of a spring (not shown) attached to the frame of the watch and which tends to apply a feeler 32 forming the other end of the rake 20 against the profile of the equation cam
  • the solar weather display gear includes a sun time display pinion 34 placed in the center of the differential gear device 14.
  • This sun time display pinion 34 meshes with the planet gears 22, and on the other hand a display wheel of the solar time 38 which meshes with a roadway 40 on the barrel from which is driven the minute hand of the solar time 4.
  • This wheel 38, 40 allows to to return the display of the solar minute to the center 42 of the clockwork movement of the watch, so that the minute hand of the solar time 4 is concentric with the minute hand of the civil time 18.
  • the time equation cam 1, the rake 20 and therefore the equation wheel of time 26 are immobile.
  • the planet gears 22 are driven by the watch movement of the watch. They therefore turn on themselves and roll on the internal toothing 24 of the equation wheel of time 26, driving the display pinion of the solar time 34 in rotation, which allows the minute hand of the solar time 4 to turn concomitantly with the minute hand of civil time minutes 18.
  • the difference between the minute hand of the solar time 4 and the minute hand of the civil time 18 therefore remains constant over a period of 24 hours.
  • the equation cam of time 1 rotates, driven by the date mechanism that moves the calendar from one day to the next.
  • the feeler 32 which is in contact with the profile of the equation cam of the time 1 rotates the rake 20 in turn.
  • This rake 20, by pivoting drives the equation wheel of the time 26. rotation.
  • the planet gears 22 being, during this brief time interval, substantially immobile (they turn one on their own in one hour), rotate on themselves while being rotated by the equation wheel of time 26, and in turn drive the sun time display gear 34 so as to again exactly adjust the position of the minute hand of the solar time.
  • the walking time equation mechanism described above thus allows, by means of a minute hand of the civil time and a minute hand of the solar time, to display at any time the time difference between the mean solar time and the true time.
  • the present invention aims to overcome the problems described above as well as others by providing a walking time equation mechanism controlled by a differential gear device which is particularly easier to read.
  • the present invention relates to a walking time equation mechanism comprising a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time and a needle minutes of the true time concentric with the hand of the hours of the civil time, the switch being deprived of a hand of the minutes of the civil time, the hand of the hours of the civil time being driven in rotation by a clockwork movement and resulting in turn the minute hand of true time, the equation mechanism of the walking time also including a time equation cam having a profile that is determined by the difference, for each day of the year, between the mean solar time or civil time, and solar time or true time, this time equation cam being rotated at the rate of one revolution per year by the watch movement, the position of the minute hand, u true time being determined by the position of the equation cam of time.
  • the present invention provides a walking time equation mechanism whose switch is only formed from a minute hand of the true time concentric to a hand of the hours of the civil time. In the absence of a minute hand of the civil time, the reading of the solar time is therefore immediate. In particular, the problem of reading solar time on days when the difference between the minute of the civil time and the minute of the solar time is small does not arise. Moreover, apart from the switching of solar time, it is possible to provide a referral of the civil time conventionally formed by an hour hand of the civilian time and a hand of concentric civil time minutes.
  • the reading of the civil time is immediate and the user does not have to perform mental operation to distinguish the minute hand of the civil time from the minute hand of the solar time, then reconstitute the civil time by appreciating the difference between the hour hand of the civil time and the minute hand of the civil time.
  • the present invention proceeds from the general inventive idea of providing a running time equation mechanism including a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time and a hand of the minutes of the true time concentric with the hand of the hours of the civil time, the switch being deprived of a hand of the minutes of the civil time.
  • a running time equation mechanism including a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time and a hand of the minutes of the true time concentric with the hand of the hours of the civil time, the switch being deprived of a hand of the minutes of the civil time.
  • the device for displaying the solar time or true time according to the invention can be advantageously completed by a civil time switch comprising an hour hand and a concentric minute hand and which are driven by the same roadway as the display device of the true time.
  • a civil time switch comprising an hour hand and a concentric minute hand and which are driven by the same roadway as the display device of the true time.
  • the object of the present invention is to integrate in a timepiece such as a wristwatch a walking time equation mechanism of a new kind whose switch comprises a minute hand of the true time concentric with a hour hand of the civil time.
  • the walking time equation mechanism according to the invention generally designated by the general numerical reference 44, comprises a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time 46 and a hand of the minutes of the true time 50, concentric with the hand of the hours of the civil time 46, and which indicates the minute of the true time.
  • the minute hand of the true time 50 may, for example, end with a representation of the astrological symbol of the sun 52.
  • the exact position of the minute hand of the true time 50 for a given day can be determined once in 24 hours, around midnight, or be continuously adjusted.
  • the time equation cam 54 is fixed on an equation wheel of time 56 which is driven at the rate of one complete revolution per year by a simple or perpetual calendar mechanism (not shown) that the timepiece.
  • This date mechanism can be of any known type and will not be described here in detail. It is sufficient, in fact, for a good understanding of the invention, to know that this date mechanism causes the equation wheel of the time 56 on which is fixed the time equation cam 54 at a rate of one complete revolution per year. In the case where the date mechanism is also used to display the date, this date mechanism may include a date wheel 58 which rotates at a rate of one complete revolution per month by driving a date indicator 104.
  • time equation wheel 56 is driven by the date wheel 58 via an intermediate date wheel 60 for reversing the direction of rotation, and a reduction wheel 62 which makes it possible to reduce the speed of rotation of the wheel. one full turn per month to one full turn per year.
  • the minute hand of the true time 50 is driven by a differential gear device 64 which has respective inputs (see FIG. figure 3 ) a mobile 66 of a finishing gear and a time equation lever 68.
  • the mobile 66 of the finishing train drives the civil time hour hand 46, while the time equation lever 68 cooperates with the time equation cam 54.
  • a clock of the hours of the civil time 70 is driven by the mobile 66 of the finishing gear of the timepiece of the timepiece via a roadway 72 fixed for example by driving on a road sprocket 74.
  • the road sprocket 74 drives a reducing satellite mobile 76 formed of a first satellite wheel 78 and a first satellite gear 80 integral with the first satellite wheel 78.
  • the satellite gear reducer 76 is pivotally mounted around a first pin 82 fixed for example by driving in a differential frame 84 which is secured to the gun hours of civil time 70 on which is driven the hour hand of civil time 46 Driven by the road sprocket 74 via the first satellite wheel 78, the first planet gear 80 rolls on a first internal toothing 86 of a first differential ring 88 which is carried by the clockwork movement and which is fixed . By rolling on the first internal toothing 86 of the fixed differential ring 88, the first satellite gear 80 rotates the differential frame 84 and thus the gun of the times of the civil time 70 which is integral with the differential frame 84.
  • the reducing satellite mobile 76 makes it possible, by a reduction of one twelfth, to go from the minute of the civil time to the time of the civil time.
  • a multiplier satellite mobile 90 is formed of a second satellite wheel 92 and a second satellite gear 94 integral with the second satellite wheel 92.
  • the multiplier satellite mobile 90 is mounted free around a second pin 96 fixed for example by driving in the differential frame 84 which is secured to the gun of the hours of the civil time 70.
  • the gun of the hours of the civil time 70 and thus the differential frame 84 rotate, they cause the second pin 96 and, therefore, the multiplier satellite mobile 90 whose second sun gear 94 rolls on a second internal toothing 98 of a mobile differential ring 100 which will be seen below that it is engaged with the equation of time cam 54.
  • the second satellite wheel 92 in turn causes a minute canon of the true time 102 on which is driven the minute hand of the true time 50.
  • a twelve-fold increase is made between the time of the civil time and the minute of the true time and one obtains thus holds the minute display of true time.
  • the multiplier satellite mobile 90 makes it possible, by a multiplication by twelve, to go from the time of the civil time to the minute of the true time.
  • the reducing satellite mobile 76 and the multiplying satellite mobile 90 rotate on themselves by describing a circular trajectory centered on the gun of the hours of the civil time 70.
  • the reducing satellite mobile 76 and the mobile multiplier satellite 90 move on the same circle, centered on the gun of the hours of the civil time 70, being angularly spaced.
  • the mobile differential crown 100 is pivotally controlled by the time equation lever 68 provided with a probe nose 106 through which the time equation lever 68 is in contact with the profile of the cam. Equation of time 54.
  • This time equation lever 68 is held resiliently against the profile of the equation of time cam 54 by a spring 108.
  • This equation of time lever 68 is also provided with a first tooth 110 engaged with a corresponding second tooth 112 provided on the differential ring gear mobile 100 to control the movement of the latter. It is understood that at a time close to midnight when the date mechanism changes date, it controls the advance of a step of the date wheel 58. During this brief moment when the change of date occurs, the differential frame 84 and thus the clock of the hours of civil time 70 can be considered as immobile.
  • the mobile differential crown 100 drives the second satellite pinion 94 and thus the second satellite wheel 92 which, in turn, meshes with the canon of the minutes of the true time 102 on which is driven the minute hand of the true time 50.
  • the position of the minute hand of the true time 50 is thus adjusted for the day to come. In the case of a trailing date mechanism, the position of the minute hand of the true time 50 is continuously adjusted.
  • the roadway 72 drives a second roadway 118 via an intermediate return wheel 120.
  • This second roadway 118 is fixedly mounted on a gun of the minutes of the civil time 122 on which is driven a minute hand of the civil time 124.
  • the gun of the minutes the civil time 122 drives via a second reduction gear 126 comprising a reducing wheel 128 fixed on a reduction pinion 130 a second gun of the hours of civil time 132 on which is driven a second hand of the hours of the civil time 134.
  • the intermediate deflection wheel 120 Through employment of the intermediate deflection wheel 120, the display of the civil time by means of the second hand of the hours of the civil time 134 and the minute hand of the civil time 124 turns in the right direction over a dial of shows 136.
  • the intermediate idler wheel 120 also makes it possible to ensure a sufficient spacing between the display of the time solar and the display of true time so that these two displays do not interfere.
  • the reading of the civil time is thus also immediate and the user does not have to perform a mental operation to distinguish the minute hand from the civil time of the minute hand of the solar time, then reconstitute the civil time by appreciation of the difference between the hour hand of the civil time and the minute hand of the civil time.
  • the same PTO is used to produce the minute of true time on the one hand, and the civil time on the other hand, which greatly simplifies the assembly.
  • the solar time display device or true time and the calendar time display device are arranged on the same side of the watch dial 136.
  • the solar time display device or true time is disposed on the dial side of the watch 136, while the calendar time display device is disposed on the side of a bottom 138 of the watch. It can be seen in this embodiment that it is possible to dispense with the intermediate return wheel 120 because there is no need to correct the direction of rotation of the second display device of the civil time when it is necessary to the other side of the watch.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Electromechanical Clocks (AREA)

Abstract

L'invention concerne un mécanisme d'équation du temps marchante comprenant un aiguillage dont le rôle est d'indiquer le temps solaire ou temps vrai au moyen d'une aiguille des heures du temps civil (46) et d'une aiguille des minutes du temps vrai (50) concentrique à l'aiguille des heures du temps civil (46), l'aiguillage étant dépourvu d'une aiguille des minutes du temps civil, l'aiguille des heures du temps civil (46) étant entraînée en rotation par un mouvement d'horlogerie et entraînant à son tour l'aiguille des minutes du temps vrai (50), le mécanisme d'équation du temps marchante (44) comprenant également une came d'équation du temps (54) présentant un profil qui est déterminé par la différence, pour chaque jour de l'année, entre le temps solaire moyen ou temps civil, et le temps solaire ou temps vrai, cette came d'équation du temps (54) étant entraînée en rotation à raison d'une révolution par an par le mouvement d'horlogerie, la position de l'aiguille des minutes du temps vrai (50) étant déterminée par la position de la came d'équation du temps (54).The invention relates to a walking time equation mechanism comprising a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time (46) and a hand of the minutes of the true time (50) concentric with the hand of the hours of the civil time (46), the switch being devoid of a hand of the minutes of the civil time, the hour hand of the civil time (46) being driven in rotation by a watch movement and in turn driving the minute hand of true time (50), the walking time equation mechanism (44) also including a time equation cam (54) having a profile which is determined by the difference, for each day of the year, between the mean solar time or the civil time, and the solar time or true time, this equation of time (54) being rotated due to a revolution per year by the watch movement, the position of the needle of The minutes of the true time (50) being determined by the position of the time equation cam (54).

Description

Domaine technique de l'inventionTechnical field of the invention

La présente invention a pour objet un mécanisme d'équation du temps marchante pour une pièce d'horlogerie. Plus précisément, l'invention concerne un mécanisme d'équation du temps marchante entraînant une aiguille des minutes du temps vrai concentrique à une aiguille des heures.The present invention relates to a walking time equation mechanism for a timepiece. More specifically, the invention relates to a walking time equation mechanism driving a minute hand of the true time concentric to an hour hand.

Arrière-plan technologique de l'inventionTechnological background of the invention

Comme on le sait, il existe un Ă©cart entre le temps solaire vrai qui correspond Ă  la durĂ©e qui s'Ă©coule entre deux passages au zĂ©nith consĂ©cutifs du Soleil au mĂ©ridien d'un mĂªme lieu, et le temps solaire moyen ou temps civil qui est la moyenne, faite sur l'annĂ©e, de la durĂ©e de tous les jours solaires vrais. Cette diffĂ©rence entre le temps civil et le temps vrai atteint +14 min 22 s le 11 fĂ©vrier, et -16 min 23 s le 4 novembre. Ces valeurs varient peu d'annĂ©e en annĂ©e.As we know, there is a gap between the true solar time which corresponds to the duration that elapses between two consecutive zenith passages of the Sun at the meridian of the same place, and the mean solar time or civil time which is the average, made over the year, the duration of all solar days true. This difference between the civil time and the true time reaches +14 min 22 s on February 11, and -16 min 23 s on November 4. These values vary little from year to year.

Pour indiquer l'écart de temps entre le temps civil et le temps vrai, certaines pièces d'horlogerie comportent, en plus de l'aiguille qui indique la minute du temps civil, un mécanisme dit d'équation du temps qui comprend une aiguille qui se déplace en regard d'une échelle graduée pour indiquer la différence entre la minute du temps civil et la minute du temps solaire pour un jour donné. Cette aiguille des minutes du temps vrai est actionnée par une came d'équation du temps dont le profil est déterminé par la différence entre le temps solaire moyen et le temps solaire vrai pour tous les jours de l'année.To indicate the time difference between the civil time and the true time, some timepieces include, in addition to the hand which indicates the minute of the civil time, a so-called time equation mechanism which includes a needle which moves next to a graduated scale to indicate the difference between the minute of the civil time and the minute of the solar time for a given day. This minute hand of the true time is actuated by a weather equation cam whose profile is determined by the difference between the mean solar time and the true solar time for all the days of the year.

Un autre mécanisme pour indiquer l'écart de temps entre le temps civil et le temps vrai est connu sous le nom d'équation du temps marchante. L'aiguillage d'une pièce d'horlogerie équipée d'un mécanisme d'équation du temps marchante comporte deux aiguilles des minutes concentriques, l'une indiquant la minute du temps civil, et l'autre indiquant la minute du temps vrai. A tout instant, l'écart entre l'aiguille des minutes du temps civil et l'aiguille des minutes du temps vrai est déterminé par la différence entre le temps solaire moyen et le temps solaire vrai pour le jour de l'année considéré. Comme dans le cas du mécanisme d'équation du temps, l'aiguille des minutes du temps vrai d'un mécanisme d'équation du temps marchante est actionnée par une came d'équation du temps.Another mechanism for indicating the time difference between the civil and the real time is known as the walking time equation. The turnout of a timepiece equipped with a walking time equation mechanism comprises two concentric minute hands, one indicating the minute of the civil time, and the other indicating the minute of the true time. At any moment, the difference between the minute hand of the civil time and the minute hand of the true time is determined by the difference between the mean solar time and the true solar time for the day of the year considered. As in the case of the equation of time mechanism, the minute hand of the true time of a walking equation mechanism is actuated by a time equation cam.

La came d'Ă©quation du temps est entraĂ®nĂ©e en rotation Ă  raison d'une rĂ©volution par an Ă  partir d'un mĂ©canisme de quantième qui peut Ăªtre simple ou perpĂ©tuel. Le quantième simple est un mĂ©canisme agencĂ© pour indiquer le jour de la semaine, le quantième du mois, le mois de l'annĂ©e ou encore les phases de la Lune, mais qui ne tient pas compte de la variation du nombre de jours dans le mois (mois de 28, 29 ou 30 jours). En d'autres termes, l'utilisateur d'une montre possĂ©dant un mĂ©canisme de quantième simple devra effectuer une correction manuelle toutes les fins de mois qui comptent moins de 31 jours. Par exemple, le 28 fĂ©vrier ou le 30 avril, il faudra effectuer une intervention manuelle. En ce qui concerne le mĂ©canisme de quantième perpĂ©tuel, il permet, comme un mĂ©canisme de quantième simple, d'indiquer le jour, le quantième, le mois et les phases de la Lune. Mais Ă  la diffĂ©rence d'un mĂ©canisme de quantième simple, un mĂ©canisme de quantième perpĂ©tuel tient automatiquement compte de la longueur des mois (28, 29 et 30 jours), et ceci sans intervention manuelle. Un mĂ©canisme de quantième perpĂ©tuel tient donc automatiquement compte des annĂ©es bissextiles.The equation of time cam is rotated at the rate of one revolution per year from a date mechanism that can be simple or perpetual. The simple calendar is a mechanism arranged to indicate the day of the week, the day of the month, the month of the year or the phases of the Moon, but which does not take into account the variation of the number of days in the month. (months of 28, 29 or 30 days). In other words, the user of a watch having a simple date mechanism will have to perform a manual correction every month ends that are less than 31 days. For example, February 28 or April 30 will require manual intervention. With regard to the perpetual calendar mechanism, it allows, as a simple date mechanism, to indicate the day, the date, the month and the phases of the Moon. But unlike a simple date mechanism, a perpetual calendar mechanism automatically takes into account the length of the months (28, 29 and 30 days), without manual intervention. A perpetual calendar mechanism therefore automatically takes into account leap years.

Un exemple d'un mécanisme d'équation du temps marchante est divulgué par la demande de brevet européen EP 1 286 233 A1 au nom de la Demanderesse. La figure 1 annexée à la présente demande de brevet est reprise de la demande de brevet européen EP 1 286 233 A1 mentionnée ci-dessus et illustre un mécanisme d'équation du temps marchante mû par un dispositif différentiel.An example of a walking time equation mechanism is disclosed by the European patent application EP 1 286 233 A1 in the name of the Claimant. The figure 1 attached to this patent application is resumption of the European patent application EP 1 286 233 A1 mentioned above and illustrates a walking time equation mechanism driven by a differential device.

Sur cette figure est notamment visible une came d'Ă©quation du temps 1 dont le profil est dĂ©terminĂ© par la diffĂ©rence, pour chaque jour de l'annĂ©e, entre le temps solaire moyen ou temps civil et le temps solaire vrai. Cette came d'Ă©quation du temps 1 est entraĂ®nĂ©e en rotation Ă  raison d'une rĂ©volution par an Ă  partir d'un mĂ©canisme de quantième simple ou perpĂ©tuel que comporte la pièce d'horlogerie. La came d'Ă©quation du temps 1 porte un disque des mois 2 qui tourne Ă  la mĂªme vitesse qu'elle et qui permet de faire coĂ¯ncider la position de cette came d'Ă©quation du temps 1 avec la date indiquĂ©e par le mĂ©canisme de quantième afin que l'aiguille des minutes du temps solaire 4 indique le dĂ©calage exact entre la minute du temps civil et la minute du temps solaire.In this figure is notably visible an equation cam of time 1 whose profile is determined by the difference, for each day of the year, between the mean solar time or civil time and the true solar time. This equation of time 1 cam is rotated at a rate of one revolution per year from a simple or perpetual calendar mechanism that includes the timepiece. Equation cam of time 1 carries a disc of months 2 which rotates at the same speed as it and which makes it possible to make coincide the position of this equation cam of time 1 with the date indicated by the date mechanism so that the minute hand of solar time 4 indicates the exact offset between the minute of the civil time and the minute of the solar time.

Le mĂ©canisme de quantième, simple ou perpĂ©tuel, peut Ăªtre de tout type connu et ne sera pas dĂ©crit ici dans sa totalitĂ©. Il suffit, en effet, pour une bonne comprĂ©hension, de savoir que ce mĂ©canisme de quantième entraĂ®ne la came d'Ă©quation du temps 1 Ă  raison d'un tour complet par an. On a cependant reprĂ©sentĂ©, Ă  titre illustratif seulement, un mobile de quantième 6 entraĂ®nant une aiguille 8 qui indique la date (de 1 Ă  31). Ce mobile de quantième 6 tourne Ă  raison d'un tour complet par mois. Il est actionnĂ© par le mĂ©canisme de quantième et entraĂ®ne la came d'Ă©quation du temps 1 via une roue de renvoi intermĂ©diaire de quantième 10 qui permet d'inverser le sens de rotation, et un mobile de rĂ©duction 12 qui permet de rĂ©duire la vitesse de rotation d'un tour complet par mois Ă  un tour complet par an.The date mechanism, simple or perpetual, can be of any known type and will not be described here in its entirety. For a good understanding, it suffices to know that this date mechanism drives the equation cam of time 1 at the rate of one complete revolution per year. However, it is shown for illustrative purposes only a date mobile 6 driving a needle 8 which indicates the date (1 to 31). This mobile date of 6 rotates at a rate of one complete turn per month. It is actuated by the date mechanism and drives the time equation cam 1 via an intermediate date wheel 10 which makes it possible to reverse the direction of rotation, and a reduction wheel 12 which makes it possible to reduce the speed of rotation. rotation of one full turn per month to one full turn per year.

L'aiguille des minutes du temps solaire 4 est entraĂ®nĂ©e par un dispositif Ă  engrenage diffĂ©rentiel 14 qui a pour entrĂ©es respectives un rouage entraĂ®nant une aiguille des minutes du temps civil 18, et un rĂ¢teau 20 qui coopère avec la came d'Ă©quation du temps 1 (sur la figure 1, le rĂ¢teau 20 est reprĂ©sentĂ© dans ses deux positions extrĂªmes, une fois en trait plein, et l'autre fois en trait mixte). Plus prĂ©cisĂ©ment, comme cela est visible sur la figure 1, le dispositif Ă  engrenage diffĂ©rentiel 14 comprend au moins un et, prĂ©fĂ©rentiellement, deux pignons satellites 22 entraĂ®nĂ©s par la minuterie du mouvement d'horlogerie de la montre. Ces deux pignons satellites 22 sont aptes Ă  tourner sur eux-mĂªmes et Ă  rouler sur la denture intĂ©rieure 24 d'une roue d'Ă©quation du temps 26. Cette dernière prĂ©sente Ă©galement sur son pourtour extĂ©rieur un premier secteur dentĂ© 28 par lequel elle coopère avec un second secteur dentĂ© 30 dont est muni le rĂ¢teau 20 Ă  l'une de ses extrĂ©mitĂ©s. Ce rĂ¢teau 20 est soumis Ă  l'action de rappel d'un ressort (non reprĂ©sentĂ©) fixĂ© au bĂ¢ti de la montre et qui tend Ă  appliquer un palpeur 32 formant l'autre extrĂ©mitĂ© du rĂ¢teau 20 contre le profil de la came d'Ă©quation du temps 1. Le rouage d'affichage du temps solaire comprend quant Ă  lui un pignon d'affichage du temps solaire 34 placĂ© au centre du dispositif Ă  engrenage diffĂ©rentiel 14. Ce pignon d'affichage du temps solaire 34 engrène d'une part avec les pignons satellites 22, et porte d'autre part une roue d'affichage du temps solaire 38 qui engrène avec une chaussĂ©e 40 sur le canon de laquelle est chassĂ©e l'aiguille des minutes du temps solaire 4. Ce rouage 38, 40 permet de ramener l'affichage de la minute solaire au centre 42 du mouvement d'horlogerie de la montre, de façon que l'aiguille des minutes du temps solaire 4 soit concentrique Ă  l'aiguille des minutes du temps civil 18.The minute hand of the solar time 4 is driven by a differential gear device 14 which has respective inputs a gear train driving a minute hand of the civil time 18, and a rake 20 which cooperates with the time equation cam 1 (on the figure 1 , the rake 20 is represented in its two extreme positions, once in solid line, and the other time in dotted lines). More precisely, as is visible on the figure 1 , the differential gear device 14 comprises at least one and, preferably, two planet gears 22 driven by the timer of the watch movement of the watch. These two planet gears 22 are able to turn on themselves and to roll on the internal toothing 24 of an equation wheel of time 26. The latter also has on its outer periphery a first toothed sector 28 by which it co-operates with a second toothed sector 30 which is provided with the rake 20 at one of its ends. This rake 20 is subjected to the return action of a spring (not shown) attached to the frame of the watch and which tends to apply a feeler 32 forming the other end of the rake 20 against the profile of the equation cam The solar weather display gear includes a sun time display pinion 34 placed in the center of the differential gear device 14. This sun time display pinion 34 meshes with the planet gears 22, and on the other hand a display wheel of the solar time 38 which meshes with a roadway 40 on the barrel from which is driven the minute hand of the solar time 4. This wheel 38, 40 allows to to return the display of the solar minute to the center 42 of the clockwork movement of the watch, so that the minute hand of the solar time 4 is concentric with the minute hand of the civil time 18.

Le mĂ©canisme d'Ă©quation du temps marchante qui vient d'Ăªtre dĂ©crit fonctionne de la manière suivante.The walking time equation mechanism just described works as follows.

En rĂ©gime de fonctionnement normal de la montre, la came d'Ă©quation du temps 1, le rĂ¢teau 20 et donc la roue d'Ă©quation du temps 26 sont immobiles. Par contre, les pignons satellites 22 sont entraĂ®nĂ©s par le mouvement d'horlogerie de la montre. Ils tournent donc sur eux-mĂªmes et roulent sur la denture intĂ©rieure 24 de la roue d'Ă©quation du temps 26, entraĂ®nant le pignon d'affichage du temps solaire 34 en rotation, ce qui permet Ă  l'aiguille des minutes du temps solaire 4 de tourner de façon concomitante Ă  l'aiguille des minutes du temps civil 18. L'Ă©cart entre l'aiguille des minutes du temps solaire 4 et l'aiguille des minutes du temps civil 18 reste donc constant sur une pĂ©riode de 24 heures.In normal operation of the watch, the time equation cam 1, the rake 20 and therefore the equation wheel of time 26 are immobile. On the other hand, the planet gears 22 are driven by the watch movement of the watch. They therefore turn on themselves and roll on the internal toothing 24 of the equation wheel of time 26, driving the display pinion of the solar time 34 in rotation, which allows the minute hand of the solar time 4 to turn concomitantly with the minute hand of civil time minutes 18. The difference between the minute hand of the solar time 4 and the minute hand of the civil time 18 therefore remains constant over a period of 24 hours.

Une fois par jour, aux environs de minuit, la came d'Ă©quation du temps 1 pivote, entraĂ®nĂ©e par le mĂ©canisme de quantième qui fait passer le calendrier d'un jour au jour suivant. A ce moment prĂ©cis, le palpeur 32 qui est en contact avec le profil de la came d'Ă©quation du temps 1 fait pivoter Ă  son tour le rĂ¢teau 20. Ce rĂ¢teau 20, en pivotant, entraĂ®ne la roue d'Ă©quation du temps 26 en rotation. Les pignons satellites 22 Ă©tant, durant ce bref intervalle de temps, sensiblement immobiles (ils font un tour complet sur eux-mĂªmes en 1 heure), tournent sur eux-mĂªmes en Ă©tant entraĂ®nĂ©s en rotation par la roue d'Ă©quation du temps 26, et entraĂ®nent Ă  leur tour le pignon d'affichage du temps solaire 34 de façon Ă  ajuster de nouveau exactement la position de l'aiguille des minutes du temps solaire.Once a day, around midnight, the equation cam of time 1 rotates, driven by the date mechanism that moves the calendar from one day to the next. At this precise moment, the feeler 32 which is in contact with the profile of the equation cam of the time 1 rotates the rake 20 in turn. This rake 20, by pivoting, drives the equation wheel of the time 26. rotation. The planet gears 22 being, during this brief time interval, substantially immobile (they turn one on their own in one hour), rotate on themselves while being rotated by the equation wheel of time 26, and in turn drive the sun time display gear 34 so as to again exactly adjust the position of the minute hand of the solar time.

Le mécanisme d'équation du temps marchante décrit ci-dessus permet donc, au moyen d'une aiguille des minutes du temps civil et d'une aiguille des minutes du temps solaire, d'afficher à tout moment l'écart de temps entre le temps solaire moyen et le temps vrai.The walking time equation mechanism described above thus allows, by means of a minute hand of the civil time and a minute hand of the solar time, to display at any time the time difference between the mean solar time and the true time.

On s'est nĂ©anmoins rendu compte Ă  l'usage que la lecture du temps civil, respectivement du temps vrai, n'Ă©tait pas des plus commode. En effet, si, avec un mĂ©canisme dans lequel l'aiguille des minutes du temps civil et l'aiguille des minutes du temps vrai sont concentriques, on peut aisĂ©ment apprĂ©cier l'Ă©cart de temps qui sĂ©pare la minute du temps civil et la minute du temps vrai, il est par contre plus malcommode de lire sur sa montre l'heure qu'il est, qu'il s'agisse de l'heure civile ou de l'heure solaire. En effet, l'utilisateur est souvent obligĂ© de se remĂ©morer laquelle des aiguilles des minutes correspond au temps civil et au temps solaire, mĂªme si l'aiguille des minutes du temps vrai porte un symbole pour la diffĂ©rencier de l'aiguille des minutes du temps civil. Puis, après avoir identifiĂ© l'aiguille des minutes du temps civil, l'utilisateur doit encore produire un effort pour reconstituer mentalement le temps civil en repĂ©rant les positions respectives de l'aiguille des heures du temps civil et de l'aiguille des minutes du temps civil. On comprendra que ceci n'est pas très commode pour un utilisateur qui souhaite lire l'heure sur sa montre d'un rapide coup d'oeil. En outre, Ă  certaines pĂ©riodes de l'annĂ©e, lorsque la diffĂ©rence entre la minute du temps civil et la minute du temps vrai est faible, il est difficile d'apprĂ©cier visuellement cette diffĂ©rence du fait de la concentricitĂ© des deux aiguilles des minutes du temps civil et des minutes du temps vrai.It has been realized, however, that the reading of civil time, or true time, was not the most convenient. Indeed, if, with a mechanism in which the minute hand of the civil time and the hand of the minutes of the true time are concentric, we can easily appreciate the time difference which separates the minute from the civil time and the minute of the however, it is more difficult to read on his watch the time it is, whether it is the civil time or the solar time. Indeed, the user is often forced to remember which of the minute hands corresponds to civil time and solar time, even if the minute hand of true time carries a symbol to differentiate it from the minute hand of time civil. Then, after identifying the minute hand of the civil time, the user must still make an effort to mentally reconstruct the civil time by identifying the respective positions of the hour hand of the civil time and the minute hand of the civil time. We will understand that this is not very convenient for a user who wants to read the time on his watch at a quick glance. In addition, at certain times of the year, when the difference between the minute of the civil time and the minute of the true time is small, it is difficult to appreciate visually this difference because of the concentricity of the two hands of the minutes of the time civil and minutes of true time.

Résumé de l'inventionSummary of the invention

La présente invention a pour but de pallier les problèmes décrits ci-dessus ainsi que d'autres encore en procurant un mécanisme d'équation du temps marchante commandé par un dispositif à engrenage différentiel qui soit notamment plus simple à lire.The present invention aims to overcome the problems described above as well as others by providing a walking time equation mechanism controlled by a differential gear device which is particularly easier to read.

A cet effet, la présente invention a pour objet un mécanisme d'équation du temps marchante comprenant un aiguillage dont le rôle est d'indiquer le temps solaire ou temps vrai au moyen d'une aiguille des heures du temps civil et d'une aiguille des minutes du temps vrai concentrique à l'aiguille des heures du temps civil, l'aiguillage étant dépourvu d'une aiguille des minutes du temps civil, l'aiguille des heures du temps civil étant entraînée en rotation par un mouvement d'horlogerie et entraînant à son tour l'aiguille des minutes du temps vrai, le mécanisme d'équation du temps marchante comprenant également une came d'équation du temps présentant un profil qui est déterminé par la différence, pour chaque jour de l'année, entre le temps solaire moyen ou temps civil, et le temps solaire ou temps vrai, cette came d'équation du temps étant entraînée en rotation à raison d'une révolution par an par le mouvement d'horlogerie, la position de l'aiguille des minutes du temps vrai étant déterminée par la position de la came d'équation du temps.For this purpose, the present invention relates to a walking time equation mechanism comprising a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time and a needle minutes of the true time concentric with the hand of the hours of the civil time, the switch being deprived of a hand of the minutes of the civil time, the hand of the hours of the civil time being driven in rotation by a clockwork movement and resulting in turn the minute hand of true time, the equation mechanism of the walking time also including a time equation cam having a profile that is determined by the difference, for each day of the year, between the mean solar time or civil time, and solar time or true time, this time equation cam being rotated at the rate of one revolution per year by the watch movement, the position of the minute hand, u true time being determined by the position of the equation cam of time.

Conformément à d'autres caractéristiques de l'invention qui font l'objet des revendications dépendantes :

  • le mĂ©canisme d'Ă©quation du temps marchante comprend Ă©galement un dispositif Ă  engrenage diffĂ©rentiel dont une première entrĂ©e est constituĂ©e par une roue de chaussĂ©e qui est entraĂ®nĂ©e par le mouvement d'horlogerie et qui fait un tour en 1 heure, et dont une seconde entrĂ©e est constituĂ©e par la came d'Ă©quation du temps, le dispositif Ă  engrenage diffĂ©rentiel Ă©tant agencĂ© de manière concentrique par rapport Ă  l'aiguille des minutes du temps vrai ;
  • le dispositif Ă  engrenage diffĂ©rentiel comprend un mobile satellite rĂ©ducteur via lequel un pignon de chaussĂ©e sur lequel est fixĂ©e la roue de chaussĂ©e entraĂ®ne un canon des heures du temps civil sur lequel est chassĂ©e l'aiguille des heures du temps civil, et un mobile satellite multiplicateur via lequel le canon des heures du temps civil entraĂ®ne un canon des minutes du temps vrai sur lequel est chassĂ©e l'aiguille des minutes du temps vrai ;
  • le mobile satellite rĂ©ducteur permet de rĂ©duire la vitesse de rotation d'un tour complet par heure Ă  un tour complet par douze heures, et le mobile satellite multiplicateur permet d'augmenter la vitesse de rotation d'un tour complet en douze heures Ă  un tour complet par heure ;
  • le mobile satellite rĂ©ducteur et le mobile satellite multiplicateur tournent sur eux-mĂªmes en dĂ©crivant une trajectoire circulaire centrĂ©e sur le canon des minutes du temps vrai ;
  • le mobile satellite rĂ©ducteur et le mobile satellite multiplicateur se trouvent Ă  Ă©gale distance du canon des minutes du temps vrai ;
  • le mobile satellite rĂ©ducteur et le mobile satellite multiplicateur sont portĂ©s libres en rotation par un bĂ¢ti de diffĂ©rentiel dont le canon des heures du temps civil est solidaire ;
  • le mobile satellite rĂ©ducteur et le mobile satellite multiplicateur sont montĂ©s pivotants autour d'une première goupille, respectivement d'une seconde goupille, fixĂ©es dans le bĂ¢ti de diffĂ©rentiel ;
  • le mobile satellite rĂ©ducteur comprend une première roue de satellite solidaire d'un premier pignon de satellite ;
  • le pignon de chaussĂ©e engrène avec la première roue de satellite, et le premier pignon de satellite roule sur une première denture intĂ©rieure d'une couronne de diffĂ©rentiel fixe, ce qui a pour effet de faire tourner le bĂ¢ti de diffĂ©rentiel ;
  • la seconde roue de satellite engrène avec le canon des minutes du temps vrai, et le second pignon de satellite roule sur une seconde denture intĂ©rieure d'une couronne de diffĂ©rentiel mobile qui est reliĂ©e cinĂ©matiquement Ă  la came d'Ă©quation du temps ;
  • la couronne de diffĂ©rentiel mobile est commandĂ©e en pivotement par un levier d'Ă©quation du temps muni d'un bec palpeur par l'intermĂ©diaire duquel le levier d'Ă©quation du temps suit le profil de la came d'Ă©quation du temps ;
  • le levier d'Ă©quation du temps est maintenu en appui Ă©lastique contre le profil de la came d'Ă©quation du temps par un ressort ;
    le levier d'équation du temps est pourvu d'une première dent en prise avec une seconde dent correspondante prévue sur la couronne de différentiel mobile pour commander le déplacement de cette dernière ;
  • le bĂ¢ti de diffĂ©rentiel comprend un bĂ¢ti supĂ©rieur fixĂ© sur un bĂ¢ti infĂ©rieur au moyen d'au moins une vis.
In accordance with other features of the invention which are the subject of the dependent claims:
  • the walking time equation mechanism also comprises a differential gear device whose first input is constituted by a road wheel which is driven by the watch movement and which makes a turn in 1 hour, and a second input of which is constituted by the time equation cam, the differential gear device being arranged concentrically with respect to the minute hand of the true time;
  • the differential gear device comprises a reduction gear mobile via which a road gear on which is fixed the road wheel drives a gun of the civil time hours on which is driven the hour hand of the civil time, and a satellite mobile multiplier via which the canon of the hours of the civil time causes a canon of the minutes of the true time on which is driven the minute hand of the true time;
  • the reducing satellite can reduce the rotational speed of a complete revolution per hour to one complete revolution per twelve hours, and the multiplier satellite mobile can increase the rotational speed of a complete revolution in twelve hours to a lap complete per hour;
  • the reducing satellite mobile and the multiplying satellite mobile rotate on themselves by describing a circular trajectory centered on the canon of the minutes of the true time;
  • the reducing satellite mobile and the multiplying satellite mobile are equidistant from the minute canon of the true time;
  • the reducing satellite mobile and the multiplier satellite mobile are rotated freely by a differential frame whose civil time clock is secured;
  • the reducing satellite mobile and the multiplier satellite mobile are pivotally mounted about a first pin, respectively a second pin, fixed in the differential frame;
  • the reducing satellite mobile comprises a first satellite wheel secured to a first satellite gear;
  • the road gear meshes with the first satellite wheel, and the first satellite gear rolls on a first internal toothing of a fixed differential ring, which has the effect of rotating the differential frame;
  • the second satellite wheel meshes with the minutes barrel of true time, and the second satellite gear rolls on a second internal toothing of a movable differential ring which is kinematically connected to the equation cam of time;
  • the mobile differential ring is pivotally controlled by a time equation lever provided with a probe nose through which the equation of time lever follows the profile of the equation cam of time;
  • the time equation lever is held resiliently against the profile of the equation of time cam by a spring;
    the time equation lever is provided with a first tooth engaged with a second corresponding tooth provided on the mobile differential ring to control the movement of the latter;
  • the differential frame comprises an upper frame fixed to a lower frame by means of at least one screw.

GrĂ¢ce Ă  ces caractĂ©ristiques, la prĂ©sente invention procure un mĂ©canisme d'Ă©quation du temps marchante dont l'aiguillage est seulement formĂ© d'une aiguille des minutes du temps vrai concentrique Ă  une aiguille des heures du temps civil. En l'absence d'une aiguille des minutes du temps civil, la lecture du temps solaire est donc immĂ©diate. En particulier, le problème de lecture du temps solaire les jours oĂ¹ l'Ă©cart entre la minute du temps civil et la minute du temps solaire est faible ne se pose pas. Par ailleurs, il peut Ăªtre prĂ©vu, Ă  part de l'aiguillage du temps solaire, un aiguillage du temps civil formĂ© classiquement d'une aiguille des heures du temps civil et d'une aiguille des minutes du temps civil concentriques. Dans ce cas lĂ  aussi, la lecture du temps civil est immĂ©diate et l'utilisateur n'a pas Ă  effectuer d'opĂ©ration mentale pour distinguer l'aiguille des minutes du temps civil de l'aiguille des minutes du temps solaire, puis reconstituer l'heure civile par apprĂ©ciation de l'Ă©cart entre l'aiguille des heures du temps civil et l'aiguille des minutes du temps civil.Thanks to these characteristics, the present invention provides a walking time equation mechanism whose switch is only formed from a minute hand of the true time concentric to a hand of the hours of the civil time. In the absence of a minute hand of the civil time, the reading of the solar time is therefore immediate. In particular, the problem of reading solar time on days when the difference between the minute of the civil time and the minute of the solar time is small does not arise. Moreover, apart from the switching of solar time, it is possible to provide a referral of the civil time conventionally formed by an hour hand of the civilian time and a hand of concentric civil time minutes. In this case also, the reading of the civil time is immediate and the user does not have to perform mental operation to distinguish the minute hand of the civil time from the minute hand of the solar time, then reconstitute the civil time by appreciating the difference between the hour hand of the civil time and the minute hand of the civil time.

Brève description des figuresBrief description of the figures

D'autres caractéristiques et avantages de la présente invention ressortiront plus clairement de la description détaillée qui suit d'un exemple de réalisation d'un dispositif d'équation du temps marchante selon l'invention, cet exemple étant donné à titre purement illustratif et non limitatif seulement en liaison avec le dessin annexé sur lequel :

  • la figure 1, dĂ©jĂ  citĂ©e, est une vue d'un mĂ©canisme d'Ă©quation du temps marchante selon l'art antĂ©rieur mĂ» par un dispositif diffĂ©rentiel ;
  • la figure 2 est une vue de dessus du dispositif d'Ă©quation marchante selon l'invention ;
  • la figure 3 est une vue en coupe d'un mĂ©canisme d'affichage du temps solaire et d'un mĂ©canisme d'affichage du temps civil tous deux situĂ©s du mĂªme cĂ´tĂ© d'un cadran d'une pièce d'horlogerie, et
  • la figure 4 est une vue en coupe d'un mĂ©canisme d'affichage du temps solaire et d'un mĂ©canisme d'affichage du temps civil situĂ©s pour l'un du cĂ´tĂ© d'un cadran d'une pièce d'horlogerie, et pour l'autre du cĂ´tĂ© d'un fond de la pièce d'horlogerie.
Other features and advantages of the present invention will emerge more clearly from the following detailed description of an example embodiment of a running time equation device according to the invention, this example being given purely for illustrative purposes and not limiting only in connection with the appended drawing in which:
  • the figure 1 , already cited, is a view of a walking equation of time mechanism according to the prior art moved by a differential device;
  • the figure 2 is a top view of the walking equation device according to the invention;
  • the figure 3 is a sectional view of a solar time display mechanism and a civil time display mechanism both located on the same side of a timepiece dial, and
  • the figure 4 is a sectional view of a solar time display mechanism and a calendar time display mechanism located for one side of a timepiece dial, and for the other on the side of a background of the timepiece.

Description détaillée d'un mode de réalisation de l'inventionDetailed description of an embodiment of the invention

La prĂ©sente invention procède de l'idĂ©e gĂ©nĂ©rale inventive qui consiste Ă  procurer un mĂ©canisme d'Ă©quation du temps marchante comprenant un aiguillage dont le rĂ´le est d'indiquer le temps solaire ou temps vrai au moyen d'une aiguille des heures du temps civil et d'une aiguille des minutes du temps vrai concentrique Ă  l'aiguille des heures du temps civil, l'aiguillage Ă©tant dĂ©pourvu d'une aiguille des minutes du temps civil. Avec un tel agencement, la lecture du temps vrai est immĂ©diate puisque l'utilisateur n'a pas besoin de faire la diffĂ©rence entre l'aiguille des minutes du temps civil et l'aiguille des minutes du temps vrai avant de pouvoir lire le temps solaire ou temps vrai. Dans le cas de la prĂ©sente invention, on peut mĂªme parler d'un vĂ©ritable affichage de l'heure solaire ou heure vraie puisque seule la minute du temps vrai diffère dans une certaine mesure de la minute du temps civil au cours de l'annĂ©e, alors que l'heure vraie et l'heure civile sont identiques. L'aiguille des heures du temps civil se confond donc avec l'aiguille des heures du temps vrai, de sorte que l'indication fournie Ă  l'utilisateur par l'aiguillage formĂ© d'une aiguille des heures du temps civil et d'une aiguille des minutes du temps vrai concentriques correspond Ă  l'heure vraie exacte. En outre, le dispositif d'affichage du temps solaire ou temps vrai selon l'invention peut Ăªtre avantageusement complĂ©tĂ© par un aiguillage de l'heure civile comprenant une aiguille des heures et une aiguille des minutes concentriques et qui sont entraĂ®nĂ©es par la mĂªme chaussĂ©e que le dispositif d'affichage du temps vrai. Ainsi, l'utilisateur peut, d'un simple coup d'oeil, lire le temps vrai et le temps civil de manière claire et prĂ©cise.The present invention proceeds from the general inventive idea of providing a running time equation mechanism including a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time and a hand of the minutes of the true time concentric with the hand of the hours of the civil time, the switch being deprived of a hand of the minutes of the civil time. With such an arrangement, the reading of the true time is immediate since the user does not need to differentiate between the minute hand of the civil time and the minute hand of the true time before being able to read the solar time. or true time. In the case of the present invention, one can even speak of a true display of the solar time or true time since only the minute of the true time differs to a certain extent from the minute of the civil time during the year, while the real time and the civil time are identical. The hour hand of the civil time therefore merges with the hour hand of the true time, so that the indication provided to the user by the switch formed by a hand of the hours of the civil time and a Concentric true time minutes hand corresponds to the exact true time. In addition, the device for displaying the solar time or true time according to the invention can be advantageously completed by a civil time switch comprising an hour hand and a concentric minute hand and which are driven by the same roadway as the display device of the true time. Thus, the user can, at a glance, read the true time and civil time clearly and accurately.

La prĂ©sente invention a pour but d'intĂ©grer dans une pièce d'horlogerie telle qu'une montre-bracelet un mĂ©canisme d'Ă©quation du temps marchante d'un nouveau genre dont l'aiguillage comporte une aiguille des minutes du temps vrai concentrique Ă  une aiguille des heures du temps civil. A cet effet, et comme on peut le voir sur la figure 2, le mĂ©canisme d'Ă©quation du temps marchante selon l'invention, dĂ©signĂ© dans son ensemble par la rĂ©fĂ©rence numĂ©rique gĂ©nĂ©rale 44, comprend un aiguillage dont le rĂ´le est d'indiquer le temps solaire ou temps vrai au moyen d'une aiguille des heures du temps civil 46 et d'une aiguille des minutes du temps vrai 50, concentrique Ă  l'aiguille des heures du temps civil 46, et qui indique la minute du temps vrai. Pour permettre au porteur de la montre d'identifier facilement l'aiguille des minutes du temps vrai 50, cette dernière peut, par exemple, se terminer par une reprĂ©sentation du symbole astrologique du soleil 52. Comme on le verra plus en dĂ©tail dans la suite de la prĂ©sente description, la position exacte de l'aiguille des minutes du temps vrai 50 pour un jour donnĂ© peut Ăªtre dĂ©terminĂ©e une fois en 24 heures, aux environs de minuit, ou bien Ăªtre continument ajustĂ©e.The object of the present invention is to integrate in a timepiece such as a wristwatch a walking time equation mechanism of a new kind whose switch comprises a minute hand of the true time concentric with a hour hand of the civil time. For this purpose, and as can be seen on the figure 2 the walking time equation mechanism according to the invention, generally designated by the general numerical reference 44, comprises a switch whose function is to indicate the solar time or true time by means of a hand of the hours of the civil time 46 and a hand of the minutes of the true time 50, concentric with the hand of the hours of the civil time 46, and which indicates the minute of the true time. To allow the wearer to the watch easily identify the minute hand of the true time 50, the latter may, for example, end with a representation of the astrological symbol of the sun 52. As will be seen in more detail later in this description, the exact position of the minute hand of the true time 50 for a given day can be determined once in 24 hours, around midnight, or be continuously adjusted.

On peut voir aussi sur la figure 2 une partie du mécanisme d'équation du temps marchante 44 selon l'invention, et notamment une came d'équation du temps 54 dont le profil, rappelons-le, est déterminé par la différence entre le temps solaire moyen ou temps civil, et le temps solaire ou temps vrai pour chacun des jours de l'année.We can also see on the figure 2 a part of the equation of walking time equation 44 according to the invention, and in particular a time equation cam 54 whose profile, let us recall, is determined by the difference between the mean solar time or civil time, and the solar time or true time for each day of the year.

Toujours en liaison avec la figure 2, on voit que la came d'Ă©quation du temps 54 est fixĂ©e sur une roue d'Ă©quation du temps 56 qui est entraĂ®nĂ©e Ă  raison d'un tour complet par an par un mĂ©canisme de quantième simple ou perpĂ©tuel (non reprĂ©sentĂ©) que comporte la pièce d'horlogerie. Ce mĂ©canisme de quantième peut Ăªtre de tout type connu et ne sera pas dĂ©crit ici en dĂ©tail. Il suffit, en effet, pour la bonne comprĂ©hension de l'invention, de savoir que ce mĂ©canisme de quantième entraĂ®ne la roue d'Ă©quation du temps 56 sur laquelle est fixĂ©e la came d'Ă©quation du temps 54 Ă  raison d'un tour complet par an. Dans le cas oĂ¹ le mĂ©canisme de quantième est Ă©galement utilisĂ© pour afficher la date, ce mĂ©canisme de quantième peut comprendre une roue de quantième 58 qui tourne Ă  raison d'un tour complet par mois en entraĂ®nant un indicateur de quantième 104. D'autre part, la roue d'Ă©quation du temps 56 est entraĂ®nĂ©e par la roue de quantième 58 via une roue de renvoi intermĂ©diaire de quantième 60 permettant d'inverser le sens de rotation, et un mobile de rĂ©duction 62 qui permet de rĂ©duire la vitesse de rotation d'un tour complet par mois Ă  un tour complet par an.Always in connection with the figure 2 it can be seen that the time equation cam 54 is fixed on an equation wheel of time 56 which is driven at the rate of one complete revolution per year by a simple or perpetual calendar mechanism (not shown) that the timepiece. This date mechanism can be of any known type and will not be described here in detail. It is sufficient, in fact, for a good understanding of the invention, to know that this date mechanism causes the equation wheel of the time 56 on which is fixed the time equation cam 54 at a rate of one complete revolution per year. In the case where the date mechanism is also used to display the date, this date mechanism may include a date wheel 58 which rotates at a rate of one complete revolution per month by driving a date indicator 104. On the other hand the time equation wheel 56 is driven by the date wheel 58 via an intermediate date wheel 60 for reversing the direction of rotation, and a reduction wheel 62 which makes it possible to reduce the speed of rotation of the wheel. one full turn per month to one full turn per year.

Conformément à l'invention, l'aiguille des minutes du temps vrai 50 est entraînée par un dispositif à engrenage différentiel 64 qui a pour entrées respectives (voir figure 3) un mobile 66 d'un rouage de finissage et un levier d'équation du temps 68. Le mobile 66 du rouage de finissage entraîne l'aiguille des heures du temps civil 46, tandis que le levier d'équation du temps 68 coopère avec la came d'équation du temps 54.According to the invention, the minute hand of the true time 50 is driven by a differential gear device 64 which has respective inputs (see FIG. figure 3 ) a mobile 66 of a finishing gear and a time equation lever 68. The mobile 66 of the finishing train drives the civil time hour hand 46, while the time equation lever 68 cooperates with the time equation cam 54.

Plus précisément, comme visible sur la figure 3, un canon des heures du temps civil 70 est entraîné par le mobile 66 du rouage de finissage du mouvement d'horlogerie de la pièce d'horlogerie via une chaussée 72 fixée par exemple par chassage sur un pignon de chaussée 74. A son tour, le pignon de chaussée 74 entraîne un mobile satellite réducteur 76 formé d'une première roue de satellite 78 et d'un premier pignon de satellite 80 solidaire de la première roue de satellite 78.More precisely, as visible on the figure 3 a clock of the hours of the civil time 70 is driven by the mobile 66 of the finishing gear of the timepiece of the timepiece via a roadway 72 fixed for example by driving on a road sprocket 74. In turn, the road sprocket 74 drives a reducing satellite mobile 76 formed of a first satellite wheel 78 and a first satellite gear 80 integral with the first satellite wheel 78.

Le mobile satellite rĂ©ducteur 76 est montĂ© pivotant autour d'une première goupille 82 fixĂ©e par exemple par chassage dans un bĂ¢ti de diffĂ©rentiel 84 dont est solidaire le canon des heures du temps civil 70 sur lequel est chassĂ©e l'aiguille des heures du temps civil 46. EntraĂ®nĂ© par le pignon de chaussĂ©e 74 via la première roue de satellite 78, le premier pignon de satellite 80 roule sur une première denture intĂ©rieure 86 d'une première couronne de diffĂ©rentiel 88 qui est portĂ©e par le mouvement d'horlogerie et qui est fixe. En roulant sur la première denture intĂ©rieure 86 de la couronne de diffĂ©rentiel fixe 88, le premier pignon de satellite 80 fait pivoter le bĂ¢ti de diffĂ©rentiel 84 et donc le canon des heures du temps civil 70 qui est solidaire du bĂ¢ti de diffĂ©rentiel 84. Par un choix judicieux des rapports d'engrenage entre le pignon de chaussĂ©e 74, la première roue de satellite 78, le premier pignon de satellite 80 et la couronne de diffĂ©rentiel fixe 88, on rĂ©alise une rĂ©duction de un douzième entre la minute du temps civil et l'heure du temps civil et l'on obtient ainsi l'affichage du temps civil. Autrement dit, le mobile satellite rĂ©ducteur 76 permet, par une rĂ©duction de un douzième, de passer de la minute du temps civil Ă  l'heure du temps civil.The satellite gear reducer 76 is pivotally mounted around a first pin 82 fixed for example by driving in a differential frame 84 which is secured to the gun hours of civil time 70 on which is driven the hour hand of civil time 46 Driven by the road sprocket 74 via the first satellite wheel 78, the first planet gear 80 rolls on a first internal toothing 86 of a first differential ring 88 which is carried by the clockwork movement and which is fixed . By rolling on the first internal toothing 86 of the fixed differential ring 88, the first satellite gear 80 rotates the differential frame 84 and thus the gun of the times of the civil time 70 which is integral with the differential frame 84. judicious choice of the gear ratios between the pinion 74, the first satellite wheel 78, the first satellite gear 80 and the fixed differential ring 88, a reduction of one twelfth between the minute of the civil time and the time of the civil time and one thus obtains the display of the civil time. In other words, the reducing satellite mobile 76 makes it possible, by a reduction of one twelfth, to go from the minute of the civil time to the time of the civil time.

Comme Ă©galement visible sur la figure 3, un mobile satellite multiplicateur 90 est formĂ© d'une seconde roue de satellite 92 et d'un second pignon de satellite 94 solidaire de la seconde roue de satellite 92. Le mobile satellite multiplicateur 90 est montĂ© libre autour d'une seconde goupille 96 fixĂ©e par exemple par chassage dans le bĂ¢ti de diffĂ©rentiel 84 dont est solidaire le canon des heures du temps civil 70. Quand le canon des heures du temps civil 70 et donc le bĂ¢ti diffĂ©rentiel 84 tournent, ils entraĂ®nent la seconde goupille 96 et, par consĂ©quent, le mobile satellite multiplicateur 90 dont le second pignon de satellite 94 roule sur une seconde denture intĂ©rieure 98 d'une couronne de diffĂ©rentiel mobile 100 dont on verra ci-dessous qu'elle est en prise avec la came d'Ă©quation du temps 54. La seconde roue de satellite 92 entraĂ®ne Ă  son tour un canon des minutes du temps vrai 102 sur lequel est chassĂ©e l'aiguille des minutes du temps vrai 50. Par un choix judicieux des rapports d'engrenage entre le canon des heures du temps civil 70, la seconde roue de satellite 92, le second pignon de satellite 94 et la couronne de diffĂ©rentiel mobile 100, on rĂ©alise une multiplication par douze entre l'heure du temps civil et la minute du temps vrai et l'on obtient ainsi l'affichage de la minute du temps vrai. Autrement dit, le mobile satellite multiplicateur 90 permet, par une multiplication par douze, de passer de l'heure du temps civil Ă  la minute du temps vrai.As also visible on the figure 3 , a multiplier satellite mobile 90 is formed of a second satellite wheel 92 and a second satellite gear 94 integral with the second satellite wheel 92. The multiplier satellite mobile 90 is mounted free around a second pin 96 fixed for example by driving in the differential frame 84 which is secured to the gun of the hours of the civil time 70. When the gun of the hours of the civil time 70 and thus the differential frame 84 rotate, they cause the second pin 96 and, therefore, the multiplier satellite mobile 90 whose second sun gear 94 rolls on a second internal toothing 98 of a mobile differential ring 100 which will be seen below that it is engaged with the equation of time cam 54. The second satellite wheel 92 in turn causes a minute canon of the true time 102 on which is driven the minute hand of the true time 50. By a judicious choice of gear ratios between the gun hours of time 70, the second satellite wheel 92, the second satellite gear 94 and the mobile differential ring 100, a twelve-fold increase is made between the time of the civil time and the minute of the true time and one obtains thus holds the minute display of true time. In other words, the multiplier satellite mobile 90 makes it possible, by a multiplication by twelve, to go from the time of the civil time to the minute of the true time.

Il dĂ©coule de ce qui prĂ©cède que le mobile satellite rĂ©ducteur 76 et le mobile satellite multiplicateur 90 tournent sur eux-mĂªmes en dĂ©crivant une trajectoire circulaire centrĂ©e sur le canon des heures du temps civil 70. De prĂ©fĂ©rence, le mobile satellite rĂ©ducteur 76 et le mobile satellite multiplicateur 90 se dĂ©placent sur un mĂªme cercle, centrĂ© sur le canon des heures du temps civil 70, en Ă©tant angulairement espacĂ©s.It follows from the foregoing that the reducing satellite mobile 76 and the multiplying satellite mobile 90 rotate on themselves by describing a circular trajectory centered on the gun of the hours of the civil time 70. Preferably, the reducing satellite mobile 76 and the mobile multiplier satellite 90 move on the same circle, centered on the gun of the hours of the civil time 70, being angularly spaced.

La couronne de diffĂ©rentiel mobile 100 est commandĂ©e en pivotement par le levier d'Ă©quation du temps 68 muni d'un bec palpeur 106 par l'intermĂ©diaire duquel le levier d'Ă©quation du temps 68 est en contact avec le profil de la came d'Ă©quation du temps 54. Ce levier d'Ă©quation du temps 68 est maintenu en appui Ă©lastique contre le profil de la came d'Ă©quation du temps 54 par un ressort 108. Ce levier d'Ă©quation du temps 68 est Ă©galement pourvu d'une première dent 110 en prise avec une seconde dent 112 correspondante prĂ©vue sur la couronne de diffĂ©rentiel mobile 100 pour commander le dĂ©placement de cette dernière. On comprend en effet qu'Ă  un instant proche de minuit oĂ¹ le mĂ©canisme de quantième change de date, il commande l'avance d'un pas de la roue de quantième 58. Durant ce bref instant oĂ¹ se produit le changement de date, le bĂ¢ti de diffĂ©rentiel 84 et donc le canon des heures du temps civil 70 peuvent Ăªtre considĂ©rĂ©s comme immobiles. En pivotant, la couronne de diffĂ©rentiel mobile 100 entraĂ®ne le second pignon de satellite 94 et donc la seconde roue de satellite 92 qui, Ă  son tour, engrène avec le canon des minutes du temps vrai 102 sur lequel est chassĂ©e l'aiguille des minutes du temps vrai 50. La position de l'aiguille des minutes du temps vrai 50 est ainsi ajustĂ©e pour la journĂ©e Ă  venir. Dans le cas d'un mĂ©canisme de quantième traĂ®nant, la position de l'aiguille des minutes du temps vrai 50 est ajustĂ©e en continu.The mobile differential crown 100 is pivotally controlled by the time equation lever 68 provided with a probe nose 106 through which the time equation lever 68 is in contact with the profile of the cam. Equation of time 54. This time equation lever 68 is held resiliently against the profile of the equation of time cam 54 by a spring 108. This equation of time lever 68 is also provided with a first tooth 110 engaged with a corresponding second tooth 112 provided on the differential ring gear mobile 100 to control the movement of the latter. It is understood that at a time close to midnight when the date mechanism changes date, it controls the advance of a step of the date wheel 58. During this brief moment when the change of date occurs, the differential frame 84 and thus the clock of the hours of civil time 70 can be considered as immobile. By pivoting, the mobile differential crown 100 drives the second satellite pinion 94 and thus the second satellite wheel 92 which, in turn, meshes with the canon of the minutes of the true time 102 on which is driven the minute hand of the true time 50. The position of the minute hand of the true time 50 is thus adjusted for the day to come. In the case of a trailing date mechanism, the position of the minute hand of the true time 50 is continuously adjusted.

En se rĂ©fĂ©rant Ă  la figure 2, on voit qu'au moins une et prĂ©fĂ©rentiellement deux vis 114 permettent de fermer le bĂ¢ti de diffĂ©rentiel 84 sur un bĂ¢ti infĂ©rieur de diffĂ©rentiel 116. Les bĂ¢tis de diffĂ©rentiel 84 et infĂ©rieur 116 tournent donc ensemble lorsque le dispositif Ă  engrenage diffĂ©rentiel 64 selon l'invention fonctionne.Referring to the figure 2 it can be seen that at least one and preferably two screws 114 make it possible to close the differential frame 84 on a lower differential frame 116. The differential racks 84 and lower 116 therefore rotate together when the differential gear device 64 according to FIG. invention works.

Comme Ă©galement illustrĂ© Ă  la figure 3, la chaussĂ©e 72 entraĂ®ne une seconde chaussĂ©e 118 via une roue de renvoi intermĂ©diaire 120. Cette seconde chaussĂ©e 118 est montĂ©e fixe sur un canon des minutes du temps civil 122 sur lequel est chassĂ©e une aiguille des minutes du temps civil 124. Le canon des minutes du temps civil 122 entraĂ®ne via un second mobile rĂ©ducteur 126 comprenant une roue rĂ©ductrice 128 fixĂ©e sur un pignon rĂ©ducteur 130 un second canon des heures du temps civil 132 sur lequel est chassĂ©e une seconde aiguille des heures du temps civil 134. GrĂ¢ce Ă  l'emploi de la roue de renvoi intermĂ©diaire 120, l'affichage du temps civil au moyen de la seconde aiguille des heures du temps civil 134 et de l'aiguille des minutes du temps civil 124 tourne dans le bon sens au-dessus d'un cadran de montre 136. La roue de renvoi intermĂ©diaire 120 permet Ă©galement d'assurer un espacement suffisant entre l'affichage du temps solaire et l'affichage du temps vrai afin que ces deux affichages ne se gĂªnent pas.As also illustrated in figure 3 , the roadway 72 drives a second roadway 118 via an intermediate return wheel 120. This second roadway 118 is fixedly mounted on a gun of the minutes of the civil time 122 on which is driven a minute hand of the civil time 124. The gun of the minutes the civil time 122 drives via a second reduction gear 126 comprising a reducing wheel 128 fixed on a reduction pinion 130 a second gun of the hours of civil time 132 on which is driven a second hand of the hours of the civil time 134. Through employment of the intermediate deflection wheel 120, the display of the civil time by means of the second hand of the hours of the civil time 134 and the minute hand of the civil time 124 turns in the right direction over a dial of shows 136. The intermediate idler wheel 120 also makes it possible to ensure a sufficient spacing between the display of the time solar and the display of true time so that these two displays do not interfere.

La lecture du temps civil est ainsi Ă©galement immĂ©diate et l'utilisateur n'a pas Ă  effectuer d'opĂ©ration mentale pour distinguer l'aiguille des minutes du temps civil de l'aiguille des minutes du temps solaire, puis reconstituer l'heure civile par apprĂ©ciation de l'Ă©cart entre l'aiguille des heures du temps civil et l'aiguille des minutes du temps civil. En outre, on apprĂ©ciera que l'on utilise la mĂªme prise de force pour produire la minute du temps vrai d'une part, et l'heure civile d'autre part, ce qui simplifie considĂ©rablement le montage.The reading of the civil time is thus also immediate and the user does not have to perform a mental operation to distinguish the minute hand from the civil time of the minute hand of the solar time, then reconstitute the civil time by appreciation of the difference between the hour hand of the civil time and the minute hand of the civil time. In addition, it will be appreciated that the same PTO is used to produce the minute of true time on the one hand, and the civil time on the other hand, which greatly simplifies the assembly.

Dans l'exemple illustrĂ© Ă  la figure 3, le dispositif d'affichage du temps solaire ou temps vrai et le dispositif d'affichage du temps civil sont disposĂ©s du mĂªme cĂ´tĂ© du cadran de montre 136. Dans l'exemple illustrĂ© Ă  la figure 4, le dispositif d'affichage du temps solaire ou temps vrai est disposĂ© du cĂ´tĂ© du cadran de la montre 136, tandis que le dispositif d'affichage du temps civil est disposĂ© du cĂ´tĂ© d'un fond 138 de la montre. On voit dans cet exemple de rĂ©alisation que l'on peut s'affranchir de la roue de renvoi intermĂ©diaire 120 car il n'y a pas besoin de corriger le sens de rotation du second dispositif d'affichage du temps civil lorsqu'il est de l'autre cĂ´tĂ© de la montre.In the example shown in figure 3 , the solar time display device or true time and the calendar time display device are arranged on the same side of the watch dial 136. In the example shown in FIG. figure 4 , the solar time display device or true time is disposed on the dial side of the watch 136, while the calendar time display device is disposed on the side of a bottom 138 of the watch. It can be seen in this embodiment that it is possible to dispense with the intermediate return wheel 120 because there is no need to correct the direction of rotation of the second display device of the civil time when it is necessary to the other side of the watch.

Il va de soi que la prĂ©sente invention n'est pas limitĂ©e au mode de rĂ©alisation qui vient d'Ăªtre dĂ©crit et que diverses modifications et variantes simples peuvent Ăªtre envisagĂ©es par l'homme du mĂ©tier sans sortir du cadre de l'invention tel que dĂ©fini par les revendications annexĂ©es.It goes without saying that the present invention is not limited to the embodiment which has just been described and that various modifications and simple variants can be envisaged by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

NomenclatureNomenclature

  • 1. Came d'Ă©quation du temps1. Equation cam of time
  • 2. Disque des mois2. Disc of the months
  • 4. Aiguille des minutes du temps solaire4. Needle of minutes of solar time
  • 6. Mobile de quantième6. Mobile date
  • 8. Aiguille8. Needle
  • 10. Roue de renvoi intermĂ©diaire de quantième10. Intermediate calendar return wheel
  • 12. Mobile de rĂ©duction12. Mobile discount
  • 14. Dispositif Ă  engrenage diffĂ©rentiel14. Differential gear device
  • 18. Aiguille des minutes du temps civil18. Hour hand of civil time
  • 20. RĂ¢teau20. Rake
  • 22. Pignons satellites22. Satellite gears
  • 24. Denture intĂ©rieure24. Inner teeth
  • 26. Roue d'Ă©quation du temps26. Equation wheel of time
  • 28. Premier secteur dentĂ©28. First toothed sector
  • 30. Second secteur dentĂ©30. Second sector toothed
  • 32. Palpeur32. Feeler
  • 34. Pignon d'affichage du temps solaire34. Solar weather display gear
  • 38. Roue d'affichage du temps solaire38. Display wheel of solar time
  • 40. ChaussĂ©e40. Roadway
  • 42. Centre42. Center
  • 44. MĂ©canisme d'Ă©quation du temps marchante44. Equation mechanism of walking time
  • 46. Aiguille des heures du temps civil46. Needle of the hours of civil time
  • 50. Aiguille des minutes du temps vrai50. Hour hand of true time
  • 52. Symbole astrologique du soleil52. Astrological symbol of the sun
  • 54. Came d'Ă©quation du temps54. Time equation cam
  • 56. Roue d'Ă©quation du temps56. Equation wheel of time
  • 58. Roue de quantième58. Date wheel
  • 60. Roue de renvoi intermĂ©diaire de quantième60. Intermediate calendar return wheel
  • 62. Mobile de rĂ©duction62. Mobile discount
  • 64. Dispositif Ă  engrenage diffĂ©rentiel64. Differential gear device
  • 66. Mobile66. Mobile
  • 68. Levier d'Ă©quation du temps68. Time Equation Leverage
  • 70. Canon des heures du temps civil70. Canon of the hours of civil time
  • 72. ChaussĂ©e72. Roadway
  • 74. Pignon de chaussĂ©e74. Road sprocket
  • 76. Mobile satellite rĂ©ducteur76. Mobile satellite reducer
  • 78. Première roue de satellite78. First satellite wheel
  • 80. Premier pignon de satellite80. First satellite gear
  • 82. Première goupille82. First pin
  • 84. BĂ¢ti de diffĂ©rentiel84. Differential frame
  • 86. Première denture intĂ©rieure86. First internal toothing
  • 88. Couronne de diffĂ©rentiel fixe88. Fixed differential ring
  • 90. Mobile satellite multiplicateur90. Mobile satellite multiplier
  • 92. Seconde roue de satellite92. Second satellite wheel
  • 94. Second pignon de satellite94. Second satellite gear
  • 96. Seconde goupille96. Second pin
  • 98. Seconde denture intĂ©rieure98. Second internal toothing
  • 100. Couronne de diffĂ©rentiel mobile100. Mobile Differential Crown
  • 102. Canon des minutes du temps vrai102. Canon of minutes of true time
  • 104. Indicateur de quantième104. Date indicator
  • 106. Bec palpeur106. Probing beak
  • 108. Ressort108. Spring
  • 110. Première dent110. First tooth
  • 112. Seconde dent112. Second tooth
  • 114. Vis114. Screw
  • 116. BĂ¢ti infĂ©rieur de diffĂ©rentiel116. Differential underframe
  • 118. Seconde chaussĂ©e118. Second floor
  • 120. Roue de renvoi intermĂ©diaire120. Intermediate return wheel
  • 122. Canon des minutes du temps civil122. Canon of the minutes of civil time
  • 124. Aiguille des minutes du temps civil124. Minute hand of civil time
  • 126. Second mobile rĂ©ducteur126. Second reduction gear
  • 128. Roue rĂ©ductrice128. Reducing wheel
  • 130. Pignon rĂ©ducteur130. Reducer sprocket
  • 132. Second canon des heures du temps civil132. Second canon of the hours of civil time
  • 134. Seconde aiguille des heures du temps civil134. Second hand of the hours of the civil time
  • 136. Cadran de montre136. Watch face
  • 138. Fond de la montre138. Watch bottom

Claims (16)

MĂ©canisme d'Ă©quation du temps marchante comprenant un aiguillage dont le rĂ´le est d'indiquer le temps solaire ou temps vrai au moyen d'une aiguille des heures du temps civil (46) et d'une aiguille des minutes du temps vrai (50) concentrique Ă  l'aiguille des heures du temps civil (46), l'aiguillage Ă©tant dĂ©pourvu d'une aiguille des minutes du temps civil, l'aiguille des heures du temps civil (46) Ă©tant entraĂ®nĂ©e en rotation par un mouvement d'horlogerie et entraĂ®nant Ă  son tour l'aiguille des minutes du temps vrai (50), le mĂ©canisme d'Ă©quation du temps marchante (44) comprenant Ă©galement une came d'Ă©quation du temps (54) prĂ©sentant un profil qui est dĂ©terminĂ© par la diffĂ©rence, pour chaque jour de l'annĂ©e, entre le temps solaire moyen ou temps civil, et le temps solaire ou temps vrai, cette came d'Ă©quation du temps (54) Ă©tant entraĂ®nĂ©e en rotation Ă  raison d'une rĂ©volution par an par le mouvement d'horlogerie, la position de l'aiguille des minutes du temps vrai (50) Ă©tant dĂ©terminĂ©e par la position de la came d'Ă©quation du temps (54).Walking time equation mechanism including a switch whose function is to indicate solar time or true time by means of a civilian time hour hand (46) and a true time minute hand (50) concentric with the hand of the hours of the civil time (46), the switch being devoid of a hand of the minutes of the civil time, the hand of the hours of the civil time (46) being driven in rotation by a clockwork movement and in turn driving the minute hand of the true time (50), the walking time equation mechanism (44) also including a time equation cam (54) having a profile which is determined by the difference, for each day of the year, between the mean solar time or civil time, and the solar time or true time, this time equation cam (54) being rotated at a rate of one revolution per year by the motion watchmaking, the position of the minute hand of true time (50) being determined by the position of the time equation cam (54). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 1, caractĂ©risĂ© en ce qu'il comprend Ă©galement un dispositif Ă  engrenage diffĂ©rentiel (64) dont une première entrĂ©e est constituĂ©e par une chaussĂ©e (72) qui est entraĂ®nĂ©e par le mouvement d'horlogerie et qui fait un tour en 1 heure, et dont une seconde entrĂ©e est constituĂ©e par la came d'Ă©quation du temps (54), le dispositif Ă  engrenage diffĂ©rentiel (64) Ă©tant agencĂ© de manière concentrique par rapport Ă  l'aiguille des minutes du temps vrai (50).A walking time equation mechanism according to claim 1, characterized in that it further comprises a differential gear device (64) having a first input constituted by a roadway (72) which is driven by the watch movement and which makes one turn in 1 hour, and a second input of which is the time equation cam (54), the differential gear device (64) being arranged concentrically with the minute hand of time true (50). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 2, caractĂ©risĂ© en ce que le dispositif Ă  engrenage diffĂ©rentiel (64) comprend un mobile satellite rĂ©ducteur (76) via lequel un pignon de chaussĂ©e (74) sur lequel est fixĂ©e la chaussĂ©e (72) entraĂ®ne un canon des heures du temps civil (70) sur lequel est chassĂ©e l'aiguille des heures du temps civil (46), et un mobile satellite multiplicateur (90) via lequel le canon des heures du temps civil (70) entraĂ®ne un canon des minutes du temps vrai (102) sur lequel est chassĂ©e l'aiguille des minutes du temps vrai (50).Walking time equation mechanism according to claim 2, characterized in that the differential gear device (64) comprises a reduction gear satellite (76) via which a road gear (74) on which the roadway (72) is fixed. causes a gun of the hours of the civil time (70) on which is driven the needle of hours of the civil time (46), and a multiplier satellite mobile (90) via which the clock of the hours of the civil time (70) causes a canon of the minutes of the true time (102) on which is driven the minute hand of the time true (50). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 3, caractĂ©risĂ© en ce que le mobile satellite rĂ©ducteur (76) permet de rĂ©duire la vitesse de rotation d'un tour complet par heure Ă  un tour complet par douze heures, et en ce que le mobile satellite multiplicateur (90) permet d'augmenter la vitesse de rotation d'un tour complet en douze heures Ă  un tour complet par heure.A walking time equation mechanism according to claim 3, characterized in that the reducing satellite dish (76) reduces the rotational speed from one full revolution per hour to one full revolution per twelve hours, and that Mobile satellite multiplier (90) makes it possible to increase the rotational speed of a complete revolution in twelve hours to one complete revolution per hour. MĂ©canisme d'Ă©quation du temps marchante selon l'une des revendications 3 ou 4, caractĂ©risĂ© en ce que le mobile satellite rĂ©ducteur (76) et le mobile satellite multiplicateur (90) tournent sur eux-mĂªmes en dĂ©crivant une trajectoire circulaire centrĂ©e sur le canon des minutes du temps vrai (102).Walking time equation mechanism according to one of claims 3 or 4, characterized in that the reducing satellite mobile (76) and the multiplier satellite mobile (90) rotate on themselves by describing a circular trajectory centered on the barrel minutes of true time (102). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 5, caractĂ©risĂ© en ce que le mobile satellite rĂ©ducteur (76) et le mobile satellite multiplicateur (90) se trouvent Ă  Ă©gale distance du canon des minutes du temps vrai (102).A walking time equation mechanism according to claim 5, characterized in that the reducing satellite dish (76) and the multiplying satellite dish (90) are equidistant from the true time minutes barrel (102). MĂ©canisme d'Ă©quation du temps marchante selon l'une des revendications 5 ou 6, caractĂ©risĂ© en ce que le mobile satellite rĂ©ducteur (76) et le mobile satellite multiplicateur (90) sont portĂ©s libres en rotation par un bĂ¢ti de diffĂ©rentiel (84) dont le canon des heures du temps civil (70) est solidaire.Walking time equation mechanism according to one of claims 5 or 6, characterized in that the reducing satellite mobile (76) and the multiplier satellite mobile (90) are rotated freely by a differential frame (84) of which the canon of the hours of the civil time (70) is solidary. MĂ©canisme d'Ă©quation du temps marchante selon la revendication 7, caractĂ©risĂ© en ce que le mobile satellite rĂ©ducteur (76) est montĂ© pivotant autour d'une première goupille (82), et le mobile satellite multiplicateur (90) est montĂ© pivotant autour d'une seconde goupille (96), les première et seconde goupilles (82, 96) Ă©tant fixĂ©es dans le bĂ¢ti de diffĂ©rentiel (84).A walking time equation mechanism as claimed in claim 7, characterized in that the reducing satellite dish (76) is pivotally mounted about a first pin (82), and the multiplying satellite dish (90) is pivotally mounted around a second pin (96), the first and second pins (82, 96) being fixed in the differential frame (84). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 8, caractĂ©risĂ© en ce que le mobile satellite rĂ©ducteur (76) comprend une première roue de satellite (78) solidaire d'un premier pignon de satellite (80).A walking time equation mechanism according to claim 8, characterized in that the reducing satellite dish (76) comprises a first satellite wheel (78) integral with a first satellite pinion (80). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 9, caractĂ©risĂ© en ce que le pignon de chaussĂ©e (74) engrène avec la première roue de satellite (78), et en ce que le premier pignon de satellite (80) roule sur une première denture intĂ©rieure (86) d'une couronne de diffĂ©rentiel fixe (88), ce qui a pour effet de faire tourner le bĂ¢ti de diffĂ©rentiel (84).A walking time equation mechanism according to claim 9, characterized in that the road gear (74) meshes with the first satellite wheel (78), and that the first planet wheel gear (80) rolls on a first internal gear (86) of a fixed differential ring gear (88), thereby rotating the differential frame (84). MĂ©canisme d'Ă©quation du temps marchante selon l'une quelconque des revendications 8 Ă  10, caractĂ©risĂ© en ce que le mobile satellite multiplicateur (90) comprend une seconde roue de satellite (92) solidaire d'un second pignon de satellite (94).A walking time equation mechanism according to any one of claims 8 to 10, characterized in that the multiplier satellite mobile (90) comprises a second satellite wheel (92) integral with a second satellite gear (94). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 11, caractĂ©risĂ© en ce que la seconde roue de satellite (92) engrène avec le canon des minutes du temps vrai (102), et en ce que le second pignon de satellite (94) roule sur une seconde denture intĂ©rieure (98) d'une couronne de diffĂ©rentiel mobile (100) qui est reliĂ©e cinĂ©matiquement Ă  la came d'Ă©quation du temps (54).A walking time equation mechanism according to claim 11, characterized in that the second satellite wheel (92) meshes with the true time minutes gun (102), and that the second satellite gear (94) rolls on a second internal toothing (98) of a movable differential ring (100) which is kinematically connected to the time equation cam (54). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 12, caractĂ©risĂ© en ce que la couronne de diffĂ©rentiel mobile (100) est commandĂ©e en pivotement par un levier d'Ă©quation du temps (68) muni d'un bec palpeur (106) par l'intermĂ©diaire duquel le levier d'Ă©quation du temps (68) suit le profil de la came d'Ă©quation du temps (54).Walking time equation mechanism according to claim 12, characterized in that the movable differential ring (100) is pivotally controlled by a time equation lever (68) provided with a sensing nose (106) by the intermediate of which the time equation lever (68) follows the profile of the time equation cam (54). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 13, caractĂ©risĂ© en ce que le levier d'Ă©quation du temps (68) est maintenu en appui Ă©lastique contre le profil de la came d'Ă©quation du temps (54) par un ressort (108).A walking time equation mechanism according to claim 13, characterized in that the time equation lever (68) is held resiliently against the profile of the time equation cam (54) by a spring (108). ). MĂ©canisme d'Ă©quation du temps marchante selon la revendication 14, caractĂ©risĂ© en ce que le levier d'Ă©quation du temps (68) est pourvu d'une première dent (110) en prise avec une seconde dent (112) correspondante prĂ©vue sur la couronne de diffĂ©rentiel mobile (100) pour commander le dĂ©placement de cette dernière.Walking time equation mechanism according to claim 14, characterized in that the time equation lever (68) is provided with a first tooth (110) engaged with a corresponding second tooth (112) provided on the crown movable differential (100) for controlling the movement of the latter. MĂ©canisme d'Ă©quation du temps marchante selon l'une quelconque des revendications 7 Ă  15, caractĂ©risĂ© en ce que le bĂ¢ti de diffĂ©rentiel (84) comprend un bĂ¢ti supĂ©rieur fixĂ© sur un bĂ¢ti infĂ©rieur (116) au moyen d'au moins une vis (114).Walking time equation mechanism according to one of Claims 7 to 15, characterized in that the differential frame (84) comprises an upper frame fixed to a lower frame (116) by means of at least one screw ( 114).
EP17151406.0A 2016-12-08 2017-01-13 Running time equation mechanism controlled by a differential device Active EP3333640B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201711274187.4A CN108181797B (en) 2016-12-08 2017-12-06 Time-running equality mechanism controlled by differential device
HK18115039.1A HK1255965A1 (en) 2016-12-08 2018-11-23 Running equation of time mechanism controlled by a differential device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16202829.4A EP3333639A1 (en) 2016-12-08 2016-12-08 Running time equation mechanism controlled by a differential device

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EP3333640B1 EP3333640B1 (en) 2022-03-30

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Citations (4)

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EP1286233A1 (en) 2001-08-07 2003-02-26 Piguet, Frédéric S.A. Calendar timepiece comprising an equation-of-time device
CH696218A5 (en) * 2001-08-07 2007-02-15 Piguet Frederic Sa Timepiece in calendar including a running equation of time device.
EP1792235A1 (en) * 2004-09-15 2007-06-06 Frédéric Piguet S.A. Calendar timepiece comprising an equation-of-time device
CH698613B1 (en) * 2004-11-29 2009-09-15 Richemont Int Sa Timepiece e.g. watch, has time marking equation mechanism including action unit that connects civil time minute wheel to real time minute wheel for suppressing clearance between civil time minute hand and real time minute real hand

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Publication number Priority date Publication date Assignee Title
CH681674B5 (en) * 1991-04-17 1993-11-15 Montres Breguet Sa clockwork perpetual calendar.
EP1343056A1 (en) * 2002-03-08 2003-09-10 The British Masters SA Wristwatch with solar time display
JP5918394B2 (en) * 2012-02-27 2016-05-18 ăƒ–ăƒ©ăƒ³ăƒ‘ăƒ³ăƒ»ă‚¨ă‚¹ ă‚¢ăƒ¼ Universal actuating time difference mechanism and method of setting the same
EP2778800B1 (en) * 2013-03-12 2016-02-24 Blancpain SA. Universal running equation of time mechanism and method for adjusting such a mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286233A1 (en) 2001-08-07 2003-02-26 Piguet, Frédéric S.A. Calendar timepiece comprising an equation-of-time device
CH696218A5 (en) * 2001-08-07 2007-02-15 Piguet Frederic Sa Timepiece in calendar including a running equation of time device.
EP1792235A1 (en) * 2004-09-15 2007-06-06 Frédéric Piguet S.A. Calendar timepiece comprising an equation-of-time device
CH698613B1 (en) * 2004-11-29 2009-09-15 Richemont Int Sa Timepiece e.g. watch, has time marking equation mechanism including action unit that connects civil time minute wheel to real time minute wheel for suppressing clearance between civil time minute hand and real time minute real hand

Also Published As

Publication number Publication date
EP3333640B1 (en) 2022-03-30
HK1255965A1 (en) 2019-09-06
EP3333639A1 (en) 2018-06-13
CN108181797A (en) 2018-06-19
CN108181797B (en) 2020-10-13

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