EP3644130A1 - Datumsmechanismus - Google Patents

Datumsmechanismus Download PDF

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Publication number
EP3644130A1
EP3644130A1 EP18201841.6A EP18201841A EP3644130A1 EP 3644130 A1 EP3644130 A1 EP 3644130A1 EP 18201841 A EP18201841 A EP 18201841A EP 3644130 A1 EP3644130 A1 EP 3644130A1
Authority
EP
European Patent Office
Prior art keywords
month
thirty
date
rotation
tooth
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
EP18201841.6A
Other languages
English (en)
French (fr)
Other versions
EP3644130B1 (de
Inventor
Kadmiel WHARTON
Julien GATINET
Stéphane Berthoud
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.)
Dubois and Depraz SA
Original Assignee
Dubois and Depraz 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 Dubois and Depraz SA filed Critical Dubois and Depraz SA
Priority to EP18201841.6A priority Critical patent/EP3644130B1/de
Publication of EP3644130A1 publication Critical patent/EP3644130A1/de
Application granted granted Critical
Publication of EP3644130B1 publication Critical patent/EP3644130B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25306—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches
    • G04B19/25313—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement
    • G04B19/2532—Independent date indicating devices activated by hand or by clockwork, e.g. calendar watches driven or released by a steady movement automatically corrected at the end of mounths having less than 31 days
    • 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
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms
    • G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
    • G04B19/25353—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement
    • G04B19/2536—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by the clockwork movement automatically corrected at the end of months having less than 31 days
    • 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
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped

Definitions

  • the present invention relates to a date mechanism for a timepiece comprising a display crown carrying date indications intended to be designated successively to be read, typically through a window or using a pointer.
  • the patent application EP 1,596,261 A1 describes an annual calendar mechanism for a timepiece comprising a calendar display crown with internal toothing bearing indications intended to be read through a window.
  • the drive of this display crown in rotation under the window is carried out on the one hand, by the daily actuation of its internal toothing by a first finger of a drive member and on the other hand by the actuation each thirty of the month months of less than thirty-one days of a satellite carried by this crown and situated on a level different from that of the internal toothing of the crown by a second finger of said drive member.
  • the date mechanism described in this patent application has the drawback that its display crown comprises means, on the one hand including its internal toothing and on the other hand its month satellite, distinct for its rotational drive, these means on different levels. This takes up a lot of space, especially since the satellite, integral with the display crown, pivots with it.
  • European patent application EP 1 666 991 A1 describes an annual calendar mechanism for a timepiece comprising a movable date trainer making a revolution in twenty-four hours, this mobile being equipped with a first finger driving with a step and once a day a first stage of a date crown comprising thirty-one internal teeth, said mobile being equipped with a second finger leading by one step and at the end of one month less thirty-one days one of the five lugs which is fitted with a board secured to an annual wheel arranged coaxially with the date crown, said mechanism further comprising a reference connecting at the end of each month, said annual wheel to a lug arranged inside a second stage of said date crown.
  • the mechanism described in this application also has the disadvantage of taking up space.
  • its display crown comprises means, including on the one hand its internal toothing and on the other hand the lug which it carries via its second stage, distinct for its rotational drive, these means being located on different levels .
  • An object of the present invention is to provide a date mechanism allowing the correct display of the date display at the end of the month, whether the month is a month of thirty days or a month of thirty-one days, said mechanism comprising a display crown of which only the internal toothing, located on a single level, allows it to rotate.
  • the invention also relates to a timepiece such as a wristwatch, a pocket watch or a table calendar comprising such a date mechanism.
  • the date mechanism according to the invention is typically fixed on a frame such as a plate or a bridge of a watch movement.
  • the frame can also be an additional board, the date mechanism and said board typically forming a module. Unless otherwise indicated, the various movements described are described in relation to said frame.
  • the month cam typically includes hollowed parts, all of the same depth, and non-hollowed parts, distributed over adjacent angular sectors. It is typically a cam of twelve comprising twelve angular sectors of 30 ° alternating, following the order of the months that they represent, hollowed and non-hollowed angular portions.
  • the month cam rotates each month, typically a twelfth of a turn, to present a hollowed-out part to the probe in the months of less than thirty-one days and to present an undeveloped part to the probe in the months of thirty-one and one day.
  • rocker spring a spring that is typically fixed on the frame.
  • rest position the position of the scale in which its feeler is pressed against the month cam. There are typically two distinct rest positions of the scale, depending on whether the current month comprises thirty-one days or less than thirty-one days, these positions depending on the angular position of the cam of the months relative to the built.
  • a date mechanism 1 comprises a date display crown 2, a cam of twelve 3, a rocker 4 comprising a feeler 4a and carrying a pawl 4b, and a wheel 5 of twenty-four hours wearing a finger 6.
  • the pawl 4b carried by the rocker 4 is able to pivot around an axis of rotation A3 (virtual or imaginary), fixed relative to the rocker 4.
  • the date mechanism 1 is integrated into a timepiece movement comprising a plate 100.
  • the date display crown 2 includes indications 7 ranging from one to thirty-one and corresponding to the dates of the months, uniformly distributed over a circumference of its upper surface and intended to be read through a window 8 of which the position is fixed relative to the plate 100.
  • the window 8 is typically produced in a dial positioned above the display crown 2. In the figures, although such a dial is not shown for reasons of readability, the position of the window 8 is materialized.
  • the rocker 4 is intended to pivot around an axis of rotation O (virtual or imaginary) between a rest position, in which its feeler 4a is held in abutment against the cam of twelve 3, typically by a rocker spring 9 fixed on the plate 100, and a predetermined position called “extreme position” corresponding to the position of the rocker 4 in which the probe 4a is the furthest from the cam of twelve 3.
  • O axis of rotation
  • the pawl 4b which it carries actuates the display crown 2, the positioning of which is ensured by a positioning device 10 comprising a jumper 10a.
  • the end 4b 'of the pawl 4b cooperating with the teeth of the display crown 2 is kept pivoted counterclockwise by a pawl spring 11, fixed on the rocker 4.
  • the cam of twelve 3 has hollow parts and solid (or non-hollow) parts, each of which corresponds to a month of the common year.
  • the hollow parts of the cam of twelve 3 are all located at the same distance from its axis of rotation A2 (virtual or imaginary) and therefore all have the same depth.
  • the solid parts are also all located at the same distance from the axis of rotation A2.
  • the cam of twelve 3 rotates at the end of each month by a twelfth of a turn.
  • the probe 4a is located at a given position which determines the rest position of the rocker 4. This position determines the amplitude of the pawl 4b of the rocker 4 acting on the internal toothing of the display crown 2.
  • the cam of twelve 3 is coaxial and integral in rotation with a star of twelve 16 comprising twelve teeth.
  • This star 16 pivots around the axis A2 of a not per month. It is typically positioned by a jumper 17, only part of which is visible in the figures.
  • the finger 6 is coaxial with the wheel 5 of twenty-four hours and pivots around the axis of rotation A1 of this wheel 5 at a speed of one revolution per twenty-four hours counterclockwise.
  • the twenty-four hour wheel 5 makes one revolution a day.
  • it typically meshes with the hour wheel 18 of the clockwork of the timepiece movement in which the date mechanism 1 is integrated.
  • a pin 15 fixed on the wheel 5 of twenty-four hours allows the drive of the finger 6 in rotation at a speed of one revolution per twenty-four hours counterclockwise. It is the normal direction of rotation of the hour wheel 18 (here clockwise) which defines the direction of rotation of the wheel 5 and therefore of the finger 6.
  • the pin 15 could be replaced by an element, such as '' a retractable lug.
  • said element would allow finger 6 to be driven only when the 24-hour wheel 5 would pivot counterclockwise. This would protect the mechanism, for example when setting the time which would consist of moving the time back.
  • tooth X / Y the tooth of the display crown 2 located between the indications 7 bearing the numbers X and Y.
  • this first special tooth 15/16 comprising a first 13a and a second 13b small teeth which correspond to a tooth classic split in half. Together, these teeth 13a, 13b occupy a width "l", identical to the width of a conventional tooth.
  • These small teeth 13a, 13b play a particular role for the passage of dates at the end of the month depending on whether or not the current month is a month of thirty-one days, as explained below.
  • the figures 2a to 2d illustrate mechanism 1 in successive states, during the passage from the twenty-eight calendar to the twenty-nine calendar of the month of March.
  • the figure 2a illustrates mechanism 1, on March 28 at the end of the day.
  • the rocker 4 at rest, its feeler 4a being held in abutment by the rocker spring 9 against an in-hollow part of the cam of twelve 3.
  • the pawl 4b is in turn supported on a tooth 13/14 of the internal toothing of the date display crown 2.
  • the positioning device 10 of the display crown 2 is pivoted under the effect of this rotation. Even if the extreme position of the lever 4 is not sufficient for the pawl 4b to generate a full pitch rotation of the display crown 2, the positioning device 10 allows the repositioning of the display crown to be date 2. It helps the latter to complete the rotation of a step it started, as illustrated in figure 2c .
  • the figure 3 illustrates mechanism 1 on April 1 at the start of the day.
  • the rocker 4 at rest, its feeler 4a being held in abutment by the rocker spring 9 against a hollowed-out part of the cam of twelve 3.
  • the pawl 4b is in abutment against a tooth of the internal toothing of the date display crown 2, typically in the middle of the width of this tooth, as illustrated in the figure 3 not against the side of that tooth.
  • the stages are identical for each standard jump of a month of less than thirty-one days, that is to say for each date change of a month of less than thirty-one days except for the passage from the 30th calendar of this month to the first calendar of the following month.
  • mechanism 1 during the transition from the thirty-thirty to the thirty-one calendar of a month then from the thirty-one calendar of this month to the first calendar of the following month in the thirty-one day months is described in more detail below with reference to figures 4a to 4g .
  • the figure 4a illustrates mechanism 1 on March 30, at the end of the day.
  • the probe 4a of the rocker 4 is in abutment against a solid part of the cam of twelve 3 indicating that it is a month of thirty-one days.
  • the pawl 4b is held, by the spring 11, in abutment against the first 13a of the two small teeth 13a, 13b facing it.
  • the lever 4 is actuated by the finger 6 of the twenty-four hour wheel 5, it pivots and its pawl 4b drives the display crown 2 in clockwise rotation by acting on the tooth 14/15 of the date crown 2. This is illustrated in figures 4b and 4c .
  • the stop 12 prevents the pawl 4b from retracting by pivoting counterclockwise when the rocker 4 is raised ( figure 4b ).
  • rocker 4 has reached its extreme position.
  • the display in the window 8 shows that the display crown 2 has performed part of its rotation.
  • the rest of the rotation of the display crown 2 then occurs under the effect of the positioning device 10 of the display crown 2 which helps said crown 2 to complete its pitch.
  • the indication corresponding to the date thirty-one is then fully visible through the window 8, as illustrated in the figure 4c .
  • the figure 4d illustrates mechanism 1 several hours later, on March 31, at the end of the day.
  • the position of the cam of twelve 3 has not changed.
  • the rocker 4 is in the rest position, with its feeler 4a resting against an in-ground part of the cam of twelve 3.
  • the finger 6 again raises the rocker 4 and its pawl 4b comes drive the display crown 2 to rotate clockwise by acting this time on the small lower tooth 13b of the date crown 2 between the indications fifteen and sixteen. This is illustrated in figures 4e and 4f .
  • rocker 4 has reached its extreme position.
  • the display in the window 8 shows that the display crown 2 has performed part of its rotation.
  • the rest of the rotation of the display crown then occurs under the effect of the positioning device 10 of the display crown 2, as already explained.
  • the indication corresponding to the date "one” is then entirely visible through the window 8, as illustrated in the figure 4f .
  • mechanism 1 during the transition from the 30th calendar of a month to the first calendar of the following month in months of less than thirty-one days is described in more detail below with reference to Figures 5a to 5f .
  • the figure 5a illustrates mechanism 1 on April 30 at the end of the day.
  • the probe 4a of the rocker 4 is in abutment against a hollowed-out part of the cam of twelve 3 indicating that it is a month of less than thirty-one days.
  • the end 4b ′ of the pawl 4b is held, by the pawl spring 11, in abutment against the second 13b of the two small teeth facing it, that is to say between the two small teeth 13a, 13b.
  • the lever 4 is actuated by the finger 6 of the twenty-four hour wheel 5, it pivots and its pawl 4b drives the display crown 2 in clockwise rotation by acting on the first small tooth 13a of the date crown 2.
  • the stop 12 prevents the end 4b 'of the pawl 4b from being retracted during the lifting of the rocker 4. It keeps the end 4b' of the pawl 4b in the trajectory of the first small tooth 13a and therefore participates in the drive of the display crown 2 in rotation.
  • rocker 4 has not reached its extreme position.
  • the display in the window 8 shows that the display crown 2 has started to rotate one step towards the date display "thirty-one".
  • the rest of the rotation of the display crown 2 then occurs under the effect of the positioning device 10 which helps said crown 2 to complete its pitch.
  • the pawl 4b retracts and lets the second small tooth 13b pass.
  • the indication corresponding to the date thirty-one is then fully visible through the window 8, as illustrated in the figure 5c . But it only lasts a very short time. Indeed, at this stage the rocker 4 continues its rotation clockwise so that the pawl 4b again drives the display crown 2 in clockwise rotation by acting on the second small tooth 13b of the crown of date 2. This is illustrated in the figure 5d .
  • rocker 4 has reached its extreme position.
  • the display in the window 8 shows that the display crown 2 has carried out part of its rotation by one step towards the display of the date "one".
  • the rest of the rotation of the display crown 2 then occurs under the effect of the positioning device 10 of the display crown 2 which helps the latter to complete its pitch.
  • the indication corresponding to the date "one” is then entirely visible through the window 8, as illustrated in the figure 5e .
  • the second special tooth 14 of the display crown 2 caused the star to rotate one step. of twelve 16 and therefore the positioning of the cam of twelve 3 in a position corresponding to the following month, the month of May, which is a month of thirty-one days.
  • the rotation of the star of twelve 16 is illustrated in particular in figures 5d and 5th .
  • the date mechanism 1 allows the correct passage of the date display at the end of the month whether the month is a month of thirty days or a month of thirty-one days.
  • the months of thirty days, in the night from the thirty to the first, the thirty of the month is followed by the first without manual intervention.
  • the date mechanism 1 has the advantage of comprising a display crown of which only the internal toothing, located on a single level, allows it to rotate. It therefore takes up less space than the date mechanisms of this type according to the prior art. In addition, it also has the advantage of requiring only one pawl to actuate the date display crown 2.
  • the month cam 3 has twelve angular portions with hollow and non-hollow parts corresponding respectively to months of less than thirty-one days and to months of thirty-one days and is associated with a star of twelve 16 to twelve teeth. It is clear that the month cam could take different forms as long as its function is not impaired. It could in particular comprise a number of angular portions multiple of twelve and be associated with a star comprising a number of teeth corresponding to this number of angular portions. The mechanism could also be adjusted so that the valleys correspond to the months of thirty-one days and the flat parts to the months of less than thirty-one days.
  • the date mechanism 1 illustrated in figures 1 to 5f is an annual calendar mechanism and behaves in February as if it were thirty days old.
  • the mechanism could be modified so that it behaves in February as if it had thirty-one days.
  • a person skilled in the art could easily adapt it, in particular by adding a leap year cam, to make it a perpetual calendar.
  • the date mechanism according to the invention is typically fixed on a frame such as a plate or a bridge of a watch movement.
  • the date mechanism according to the invention can also have its own frame, typically an additional plate, which can be made integral with the frame of said watch movement.
  • date mechanism 1 can be adapted so that the so-called "special" teeth are positioned elsewhere on the internal teeth of the date display crown 2.
  • their shape can also be modified as long as their function is preserved.
  • the two teeth 13a, 13b of the first special tooth 13 of width "l” may not have the same width so that the recess separating them would not be located in the middle of the width "l” of the first special tooth 13 but at a distance corresponding to x% of "l” with respect to one end of this tooth 13, the position of this end being considered with respect to a predetermined direction of rotation.
  • the mechanism 1 would then be adapted so that, during the dates one to twenty-nine months of less than thirty-one days, the end 4b ′ of the pawl 4b is positioned in abutment against a tooth of the internal toothing of the display crown 2, at the same distance of x% of "l” from the end of this tooth considered with respect to the same predetermined direction of rotation.
  • the positioning device 10 illustrated in the figures 1 to 5f is a device comprising a jumper 10a associated with a mobile, said mobile comprising a five-tooth star 10b and a wide-toothed wheel 10c.
  • the width of the teeth of said wide-toothed wheel 10c typically corresponds to the distance separating two teeth from the internal toothing of the date crown 2.
  • the five-tooth star is positioned by a "classic" jumper 10a fixed on the plate 100 and the wide-toothed wheel 10c cooperates with the teeth of the display crown 2.
  • Such a positioning device 10 could be replaced by a conventional jumper (such as the jumper 10a).
  • the pawl 4b could have come in one piece with the rocker 4 while remaining mobile in rotation relative to this rocker 4.
  • the twenty-four hour wheel 5 could be rotated other than via the hour wheel 18 of the clockwork train of the watch movement in which the mechanism 1 is integrated.
  • the positioning device 10 participates in the rotation of the display crown 2, the lever not having to generate alone the displacement of a complete pitch of the crown d 'display 2. This is to limit the energy consumption required to lift the lever 4.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP18201841.6A 2018-10-22 2018-10-22 Datumsmechanismus Active EP3644130B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18201841.6A EP3644130B1 (de) 2018-10-22 2018-10-22 Datumsmechanismus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18201841.6A EP3644130B1 (de) 2018-10-22 2018-10-22 Datumsmechanismus

Publications (2)

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EP3644130A1 true EP3644130A1 (de) 2020-04-29
EP3644130B1 EP3644130B1 (de) 2021-04-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4383015A1 (de) * 2022-12-09 2024-06-12 Patek Philippe SA Genève Uhrvorrichtung zur umwandlung einer ersten drehbewegung in eine zweite drehbewegung, mindestens teilweise gegabeltes teil

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1596261A1 (de) 2004-05-14 2005-11-16 Rolex S.A. Jährlicher Kalendermechanismus für Uhrwerk
EP1666991A1 (de) 2004-12-02 2006-06-07 ETA SA Manufacture Horlogère Suisse Jährlicher Kalendermechanismus für eine Uhr
EP3043217A1 (de) * 2015-01-12 2016-07-13 Rolex Sa Vorrichtung zum aufziehen einer triebfeder eines kalender-uhrwerkmechanismus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1596261A1 (de) 2004-05-14 2005-11-16 Rolex S.A. Jährlicher Kalendermechanismus für Uhrwerk
EP1666991A1 (de) 2004-12-02 2006-06-07 ETA SA Manufacture Horlogère Suisse Jährlicher Kalendermechanismus für eine Uhr
EP3043217A1 (de) * 2015-01-12 2016-07-13 Rolex Sa Vorrichtung zum aufziehen einer triebfeder eines kalender-uhrwerkmechanismus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4383015A1 (de) * 2022-12-09 2024-06-12 Patek Philippe SA Genève Uhrvorrichtung zur umwandlung einer ersten drehbewegung in eine zweite drehbewegung, mindestens teilweise gegabeltes teil

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