EP3333639A1 - Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird - Google Patents

Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird Download PDF

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Publication number
EP3333639A1
EP3333639A1 EP16202829.4A EP16202829A EP3333639A1 EP 3333639 A1 EP3333639 A1 EP 3333639A1 EP 16202829 A EP16202829 A EP 16202829A EP 3333639 A1 EP3333639 A1 EP 3333639A1
Authority
EP
European Patent Office
Prior art keywords
time
satellite
equation
civil
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.)
Withdrawn
Application number
EP16202829.4A
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English (en)
French (fr)
Inventor
Sylvain Dauby
Alain Zaugg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP16202829.4A priority Critical patent/EP3333639A1/de
Priority to EP17151406.0A priority patent/EP3333640B1/de
Priority to CN201711274187.4A priority patent/CN108181797B/zh
Publication of EP3333639A1 publication Critical patent/EP3333639A1/de
Priority to HK18115039.1A priority patent/HK1255965A1/zh
Withdrawn legal-status Critical Current

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Classifications

    • 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 sliding date mechanism, the position of the minute hand of the true time 50 is adjusted continuously.
  • 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.
  • the intermediate return wheel 120 can be dispensed with because the size is reduced and the display of the civil time rotates in the right direction. Indeed, the civil time display device and the true time display device do not interfere with each other, so that the roadway 72 and the second roadway 118 can be in direct contact.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Electromechanical Clocks (AREA)
EP16202829.4A 2016-12-08 2016-12-08 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird Withdrawn EP3333639A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16202829.4A EP3333639A1 (de) 2016-12-08 2016-12-08 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird
EP17151406.0A EP3333640B1 (de) 2016-12-08 2017-01-13 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird
CN201711274187.4A CN108181797B (zh) 2016-12-08 2017-12-06 通过差动装置控制的时间运行等式机构
HK18115039.1A HK1255965A1 (zh) 2016-12-08 2018-11-23 通過差動裝置控制的時間運行等式機構

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16202829.4A EP3333639A1 (de) 2016-12-08 2016-12-08 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird

Publications (1)

Publication Number Publication Date
EP3333639A1 true EP3333639A1 (de) 2018-06-13

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EP16202829.4A Withdrawn EP3333639A1 (de) 2016-12-08 2016-12-08 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird
EP17151406.0A Active EP3333640B1 (de) 2016-12-08 2017-01-13 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird

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EP17151406.0A Active EP3333640B1 (de) 2016-12-08 2017-01-13 Mechanismus der wandernden zeitgleichung, der durch eine differenzialvorrichtung gesteuert wird

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EP (2) EP3333639A1 (de)
CN (1) CN108181797B (de)
HK (1) HK1255965A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286233A1 (de) 2001-08-07 2003-02-26 Piguet, Frédéric S.A. Kalenderuhr mit Äquationsvorrichtung
CH696218A5 (fr) * 2001-08-07 2007-02-15 Piguet Frederic Sa Pièce d'horlogerie à quantième comprenant un dispositif d'équation du temps marchante.
EP1792235A1 (de) * 2004-09-15 2007-06-06 Frédéric Piguet S.A. Kalender-zeitgeber mit einer zeitgleichungs-einrichtung
CH698613B1 (fr) * 2004-11-29 2009-09-15 Richemont Int Sa Mécanisme d'équation du temps avec affichage des minutes marchantes et pièce d'horlogerie munie d'un tel mécanisme.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH681674B5 (fr) * 1991-04-17 1993-11-15 Montres Breguet Sa Mouvement d'horlogerie à quantième perpétuel.
EP1343056A1 (de) * 2002-03-08 2003-09-10 The British Masters SA Uhr mit Sonnenzeitanzeige
JP5918394B2 (ja) * 2012-02-27 2016-05-18 ブランパン・エス アー ユニバーサル作動均時差機構及びこれをセットする方法
EP2778800B1 (de) * 2013-03-12 2016-02-24 Blancpain SA. Mechanismus einer universellen fortschreitenden Zeitgleichung und Regulierungsverfahren eines solchen Mechanismus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1286233A1 (de) 2001-08-07 2003-02-26 Piguet, Frédéric S.A. Kalenderuhr mit Äquationsvorrichtung
CH696218A5 (fr) * 2001-08-07 2007-02-15 Piguet Frederic Sa Pièce d'horlogerie à quantième comprenant un dispositif d'équation du temps marchante.
EP1792235A1 (de) * 2004-09-15 2007-06-06 Frédéric Piguet S.A. Kalender-zeitgeber mit einer zeitgleichungs-einrichtung
CH698613B1 (fr) * 2004-11-29 2009-09-15 Richemont Int Sa Mécanisme d'équation du temps avec affichage des minutes marchantes et pièce d'horlogerie munie d'un tel mécanisme.

Also Published As

Publication number Publication date
EP3333640B1 (de) 2022-03-30
HK1255965A1 (zh) 2019-09-06
EP3333640A1 (de) 2018-06-13
CN108181797A (zh) 2018-06-19
CN108181797B (zh) 2020-10-13

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