EP3734373B1 - Device for actuating a calendar star of a semi-perpetual or perpetual calendar mechanism - Google Patents

Device for actuating a calendar star of a semi-perpetual or perpetual calendar mechanism Download PDF

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Publication number
EP3734373B1
EP3734373B1 EP19172296.6A EP19172296A EP3734373B1 EP 3734373 B1 EP3734373 B1 EP 3734373B1 EP 19172296 A EP19172296 A EP 19172296A EP 3734373 B1 EP3734373 B1 EP 3734373B1
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EP
European Patent Office
Prior art keywords
month
cam
days
day
sub
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EP19172296.6A
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German (de)
French (fr)
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EP3734373A1 (en
Inventor
Lukas Gisler
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Priority to EP19172296.6A priority Critical patent/EP3734373B1/en
Publication of EP3734373A1 publication Critical patent/EP3734373A1/en
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    • 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
    • G04B19/25—Devices for setting the date indicators manually

Definitions

  • the present invention relates to a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism comprising a large rocker arranged on the one hand to be able to cooperate with a month cam and on the other hand to actuate the date star each day, said large rocker being capable of pivoting along a travel of variable amplitude depending on the month between a first initial actuation position defined by one of the positions of the large rocker when it is in contact with the months cam, and a final actuation position.
  • the present invention also relates to a timepiece comprising such an actuation device.
  • Such an actuation device is traditionally used in a semi-perpetual or perpetual calendar mechanism to drive the date star or 31 star each day, integral with a date indicator displaying the current date, automatically taking into account the length of the month.
  • Such an actuation device is described for example in the document EP 1 004 947 A2 .
  • the date changes automatically at the end of each month, except for the months of February which will be considered as a month of 30 or 29 days depending on the design of the mechanism.
  • the date changes automatically at the end of each month, including the months of February, whether the year is a leap year or not.
  • the large rocker is arranged to travel a path of a certain amplitude between an initial position of actuation and its final position, said initial position of actuation corresponding to the position of the large rocker when it is in support on cam for months.
  • said month cam comprises, for example, more or less deep notches depending on the length of the month (28, 29, 30 or 31 days)
  • the initial position of actuation of the large rocker differs according to the month so that the amplitude of the stroke of the large rocker varies from month to month depending on the position of the large rocker resting on the cam of the months.
  • the beak of the large rocker is in the deepest notch of the month cam so that the end of the large lever which drives the date star moves as far as possible from said date star.
  • the large rocker will achieve its greatest amplitude travel to enable it to advance the date star by 4 days on the night of February 28 to March 1 and thus catch up (i.e. correct) month-end days.
  • the problem with this mechanism is that the large rocker will have to make this large amplitude movement every day of the month of February, such a large amplitude being in fact useless until February 28th. This induces, at the level of the movement which includes the date mechanism, an unnecessary consumption of energy over a long period.
  • the beak of the large rocker is permanently resting on the month cam in order to read the duration of the current month. It is therefore necessary to provide a mechanism to enable the large lever of the month cam to be disengaged before carrying out a month correction by acting on the month star, integral with the month cam. This release must be strong enough so that no contact disturbs the positioning of the month star, but weak enough not to correct the date star by raising the large rocker too much.
  • the correction sequence must respect the following chronology: raise the large rocker, correct the month star, release the month star so that it takes its new position, then finally release the large rocker. This entire sequence must be performed with a corrector stroke of approximately 1 mm, which makes the month correction operation very tricky.
  • the present invention aims to remedy the drawbacks of known mechanisms for actuating a date star of a semi-perpetual or perpetual calendar mechanism by proposing an actuating device making it possible to prevent the large rocker from traversing a stroke complete every day so as not to unnecessarily consume the energy of the movement in which said date mechanism is mounted.
  • Another object of the present invention is to provide a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism allowing month correction that is easy to implement.
  • the present invention relates to a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism
  • a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism comprising a large rocker arranged on the one hand to be able to cooperate with a month cam and on the other hand to actuate the date star each day, said large rocker being capable of pivoting according to a stroke of variable amplitude depending on the month between a first initial actuation position defined by one of the positions of the large rocker when it is in contact with the months cam, and a final actuation position.
  • said actuating device comprises a mechanism for limiting the travel of the large rocker between a second initial actuating position and the final actuating position, said second initial actuating position being intermediate between the first initial actuating position and the final actuating position, said limiting mechanism comprising a sub-mechanism for blocking the large movable rocker between a locked position in which the large rocker is locked in its pivoting to limit its travel between its second initial actuating position and its final actuating position and an unlocked position in which the large rocker is free to pivot between its first initial actuating position and its final actuating position, and a locking cam cooperating with said under - blocking mechanism and arranged to define the days for which the sub-mechanism blocking mechanism is in the locked position or in the unlocked position, the blocking sub-mechanism being in the unlocked position at least on the last day of a month of less than 31 days where a make-up of days at the end of the month is necessary.
  • the actuating device according to the invention thanks to its blocking sub-mechanism of the large rocker, makes it possible not to cause said large rocker to travel an unnecessary stroke every day.
  • the actuating device allows the months to be corrected without having to first disengage the large rocker from the cam. months, as long as said blocking sub-mechanism occupies its locked position.
  • the present invention also relates to a timepiece comprising an actuation device as defined above.
  • the present invention relates to a device 1 for actuating a date star 2 of a perpetual calendar mechanism by means of a large lever 4 pivotally mounted on a frame element of the mechanism at a pivot point A.
  • the large rocker 4 is arranged to be able to cooperate with a month cam 6 on which the different durations of the months of a year are programmed.
  • the months cam 6 is configured to automatically take into account the length of months (28, 29, 30 days, in addition to 31-day months), including leap years, so that the mechanism represented here is a perpetual calendar mechanism.
  • the month cam 6 has on its periphery different zones corresponding to the duration of the different months, in particular prominent sectors 8 which represent the months of 31 days and notches 9 representing the months of 30 days. It also has a circular cutout 10 in which a leap cam 12 is moved once a year by 90° by an ancillary mechanism known to those skilled in the art that it is not necessary to describe in more detail (cross of Malta for example).
  • the circular sector 12a of this leap cam 12 defines the three non-leap years (February of 28 days), while the salient sector 12b defines the months of February of 29 days of the leap years. This 6 month old cam goes around in a year.
  • calendar mechanism used in the present invention can also be semi-perpetual where only the months of 29 and 30 days are managed automatically in addition to the months of 31, the correction of the months of February having to be done manually.
  • the large rocker 4 can cooperate with the month cam 6 by means of its beak 14 provided at its first end, here its upper end with respect to A.
  • the large rocker 4 is able to pivot in A according to a stroke of variable amplitude depending on the month between a first initial actuation position, which differs depending on the month, defined by one of the different positions of the large rocker 4 when it is in contact with one of the different zones of the cam of the month 6, and a final actuation position, at the end of the driven, when the large rocker 4 has finished driving the date star 2.
  • the large rocker 4 is arranged to actuate the date star 2 each day so as to display the following date by means of the index 15.
  • the large rocker 4 comprises, in a known manner, a small pawl 16 arranged to cooperate specifically with the toothing of the date star 2 and a large pawl 18 pivotally mounted on the large rocker 4 and arranged to cooperate with an end-of-month days catch-up cam 20, integral with the date star 2, at least to catch up on the days at the end of the month of less than 31 days.
  • the large pawl 18 is also arranged to cooperate with the end-of-month days catch-up cam 20 for the passage from the last day of a month to the 1st of the following month, whatever the month, and therefore including months of 31 days.
  • the large pawl 18 is active on the last day of each month, at least to make the passage from the 31st of the month to the 1st of the following month, and also the months of less than 31 days to catch up with the end of month days.
  • the small pawl 16 is arranged to cooperate directly with the date star 2 to drive it one step per day from the 1st to the last day of a month and the large pawl 18, by falling into a notch 22 provided on the end-of-month days catch-up cam 20 on the last day of a month, cooperates with said month-end days catch-up cam 20 when passing from the last day of a month to the first day of the month to move it by the number of steps corresponding to the number of days required until the date star 2, secured to the cam 20, reaches a position corresponding to the 1st day of the following month.
  • the large pawl 18 will move the cam 20 by one day at the end of the month by 31 days, by two days at the end of the month by 30 days, by three days at the end of the month of February by 29 days by one leap year or four days at the end of a month of February of 28 days of a non-leap year, in order to pass to the 1st of the following month.
  • a person skilled in the art knows how to determine the configuration of the month-end day catch-up cam 20 and, in particular the position and length of its notch 22, as well as the depth of the notches 9 and the height of the prominent sectors 8, as well as the diameter of the circular sector 12a of the leap cam 12 and the diameter of the projecting sector 12b of the month cam 6, to obtain the operation of the large pawl 18 described above.
  • the actuating device 1 comprises a mechanism for limiting the travel of the large lever 4 between a second initial actuating position, without contact with the month cam 6, and the final actuating position , said second initial position being intermediate between the first initial position and the final position so that the stroke of the large rocker 4 is limited.
  • said limiting mechanism comprises a locking sub-mechanism 24 of the large rocker 4 movable between a locked position in which the large rocker 4 is locked in its pivoting to limit its travel between its second initial position and its final position. and an unlocked position in which the large rocker 4 is free to pivot between its first initial position and its final position, and a locking cam cooperating with said locking sub-mechanism 24 and arranged to define the days for which the sub-mechanism locking mechanism 24 is in the locked position in order to limit the stroke of the large rocker 4 or in the unlocked position so as not to limit the stroke of the large rocker 4, the locking sub-mechanism 24 being in the unlocked position at least on the last day a month with less than 31 days, where a catch-up (i.e. a correction) of the days at the end of the month is necessary.
  • a catch-up i.e. a correction
  • the locking cam is constituted by the end-of-month days catch-up cam 20. It is obvious that the locking cam can be constituted by a cam specific to this function, independent of the cam end-of-month days 20.
  • the dual function of the cam 20 for catching up with the days and for locking the locking sub-mechanism 24 makes it possible to reduce the number of parts of the mechanism as well as its size.
  • the locking cam that is to say here the day catch-up cam 20 is configured to maintain the locking sub-mechanism 24 in the locked position of the 1st to 27th of a month, on days when no end-of-month adjustment is necessary, and in the unlocked position from the 28th to the last day of the month, whatever the month.
  • the locking cam can for example be configured as an annual cam managing the unlocking of the locking sub-mechanism at the end of the month of each month over a year, arranged to take into account the month 6 cam.
  • the locking sub-mechanism 24 comprises a latch 26, pivotally mounted on the frame at B, arranged to lock the large rocker 4 in its pivoting in the locked position, and a rocker 28, also pivotally mounted on the C-shaped frame, controlling the lock 26 and arranged to read on the locking/recovery cam 20 information relating to the days for which the locking sub-mechanism 24 is in the locked position or in the unlocked position.
  • the lock 26 consists of a rectilinear arm pivotally mounted at B at one of its ends and having at its other end a beak 26a which forms at the rear, in the extension of the arm, a prominence 29 directed towards the large rocker 4.
  • This prominence 29 constitutes an abutment against which a pin 30 rests and abuts, integral with the lower end of the large rocker 4, when the locking sub-mechanism 24 is in the locked position, defining the second initial position actuation of the large rocker 4.
  • rocker 28 also includes a feeler 28a arranged to cooperate with locking/recovery cam 20 and read the information relating to the days for which locking sub-mechanism 24 is in the locked position or in the unlocked position.
  • latch and the latch can be replaced by a one-piece locking member configured to provide the dual function of abutment and reading on the locking cam.
  • the latch 26 and the rocker 28 of the locking sub-mechanism 24 as well as the locking/recovery cam 20 are configured so that in the locked position of the blocking sub-mechanism 24, the rocker 28 raised in the high position by the cam 20 according to the days read by the sensor 28a, itself raises the lock 26 sufficiently, by the pin 32, so that the prominence 29 is placed on the path of the pin 30 in order to block the large rocker 4 in its second initial actuating position when it wishes to return to its first initial position after having driven the date star 2, directly by the small pawl 16 of the 1 st on the 27th of the month or indirectly via the catch-up cam 20 by the large pawl 18 after the possible catch-up of the days at the end of the month and the passage from the 31st to the 1st of the following month.
  • the lock 26 and the rocker 28 of the locking sub-mechanism 24 as well as the locking/recovery cam 20 are configured so that in unlocked position of the locking sub-mechanism 24, the rocker 28 has fallen into the low position in the notch 22 of the cam 20 so that the lock 26 has also fallen by moving its prominence 29 away from the path of the pin 30.
  • the large rocker 4 is not blocked in its pivoting and can return to its first initial position after having driven the date star 2 directly by the small pawl 16 each day from the 28th until the last day of the month.
  • the blocking sub-mechanism 24 is in the locked position as represented on the figure 1 from February 1 to 27.
  • the feeler 28a of the rocker 28 slides over the larger diameter circular contour of the locking/recovery cam 20, so that it occupies a raised position in order to raise and hold the latch 26 in the locked position, locking the large rocker 4 in its second initial actuating position.
  • the date change is performed each day by the small pawl 16, the large pawl 18 sliding on the larger diameter circular contour of the locking/recovery cam 20 being inactive.
  • the beak 14 of the large rocker is not in contact with the month cam 6 so that a correction of the month cam 6 is possible without having to raise the large rocker 4 beforehand.
  • the large pawl 18 by engaging in the notch 22 acts on the locking/recovery cam 20.
  • the small pawl 16 is inactive.
  • the beak 14 of the large rocker 4 being on the innermost sector 12a of the months cam 6, said large rocker 4 carries out the complete stroke having the greatest amplitude between its first initial actuation position corresponding to the position of the large rocker 4 when it is resting on the sector 12a and its final actuation position, allowing the large pawl 18 to advance the 4-day date star 2 via locking/recovery cam 20 (3-day recovery from 28 to 31 and one day from 31 to 1 ).
  • the 6 month cam rotated to move on to the next month, March in this case.
  • the dimensioning of the notch 22 is such that at the end of the run during the passage to March 1 , the feeler 28a of the rocker has resumed its high position on the cam 20 so that the lock 26 pivots again in the locked position. as shown in picture 3 .
  • the pin 30 of the large rocker 4 encounters the prominence 29 of the lock 26 so that the large rocker 4 is again blocked by the lock 26 in its second initial actuating position, as shown in the figure 4 .
  • the dimensioning of the notch 22 is provided so that the large pawl 18, which remains in the notch 22 the first days of the month, is positioned there so as to no longer be active, before sliding again on the contour of largest cam diameter 20.
  • the passage from February 28 to 29 is made by the small pawl 16, the large rocker 4 then performing a complete stroke between its first initial position of actuation corresponding to the position of the large rocker 4 when it is resting on the sector 12b and its final actuation position.
  • the dimensioning of the notch 22 is such that, the date star wheel 2 advancing by one step with the locking/catch-up cam 20, when the large rocker 4 completes its driven function and falls back, the large pawl 18 falls into said notch 22 of the locking/catch-up cam 20, on the last day of the month, with a view to catching up with the end-of-month days and the transition to March 1 , as shown in the figure 6 .
  • the large pawl 18 positioned in the notch 22 acts on the locking/recovery cam 20.
  • the small pawl 16 is inactive.
  • the beak 14 of the large rocker 4 being on the sector 12b of the leap cam 12, said large rocker 4 carries out a complete stroke between the first initial position of actuation corresponding to the position of the large rocker 4 when it is in pressure on the sector 12b and its final actuating position, allowing the large pawl 18 to advance the date star 2 by 3 days via the locking/recovery cam 20 (2 remedial days from 29 to 31 and one day from 31 to 1 st ).
  • the passages from the 28th to the 29th then from the 29th to the 30th of the month are made by the small pawl 16, the large rocker 4 then performing a complete stroke each day between its first initial position of actuation corresponding to the position of the large rocker 4 when 'it bears against the notch 9 and its final actuation position.
  • the dimensioning of the notch 22 is such that the large pawl 18 falls into said notch 22 of the locking/recovery cam 20 on the 30th, last day of the month, with a view to catching up on the end of month days and switching to 1 st of the following month, as shown in the figure 8 .
  • the large pawl 18 positioned in the notch 22 acts on the locking/recovery cam 20.
  • the small pawl 16 is inactive.
  • the beak 14 of the large rocker 4 being in the notch 9 of the month cam 6, said large rocker 4 realizes a complete stroke between its first initial position of actuation corresponding to the position of the large rocker 4 when it rests against the notch 9 and its final actuating position, allowing the large pawl 18 to advance the date star 2 by 2 days via the locking/recovery cam 20 (1 remedial day from 30 to 31 and one day from the 31st to the 1st ).
  • rocker 28 resumes its high position on cam 20 so that lock 26 pivots again into the locked position and large rocker 4, at the end of its function of driven, is again locked in its second initial actuating position, as shown in the figure 4 .
  • the passages from 28 to 29, from 29 to 30 then from 30 to 31 of the month are made by the small pawl 16, the large lever 4 then performing a complete stroke each day between its first initial position of actuation corresponding to the position of the large rocker 4 when it bears against the sector 8 and its final actuation position, this stroke being of lower amplitude than the stroke of the rocker during a month of 28 days.
  • the dimensioning of the notch 22 is such that the large pawl 18 falls into said notch 22 of the locking/recovery cam 20 on the 31st, last day of the month, with a view to the transition to the 1st of the following month, as shown in figure 10 .
  • the large pawl 18 positioned in the notch 22 acts on the locking/recovery cam 20.
  • the small pawl 16 is inactive.
  • the beak 14 of the large rocker 4 being on the prominent sector 8 of the months cam 6, said large rocker 4 achieves a complete stroke between its first initial position of actuation corresponding to the position of the large rocker 4 when it is resting against the sector 8 and its final actuating position, allowing the large pawl 18 to advance the date star 2 by a single day via the locking/recovery cam 20 to pass from 31 to 1 st of the next month.
  • rocker 28 resumes its high position on cam 20 so that lock 26 pivots again into the locked position and large rocker 4, at the end of its function of driven, is again locked in its second initial actuating position, as shown in the figure 4 .
  • the actuating device makes it possible to limit the travel of the large rocker from the 1st to the 27th of the month, days for which an end-of-month adjustment will never be necessary, so that the large rocker does not have needlessly run a high amplitude race on those days.
  • the large rocker will make a full stroke between its first initial position of actuation, which differs depending on the month depending on the position of the large rocker when it rests on the month cam, and its final actuation position, only 28, 29, 30 and 31 in the variant shown.
  • the actuating device makes it possible to correct the month cam from the 1st to the 27th of the month without having to first disengage the large lever of the month cam.
  • the actuating device according to the invention can be used in any perpetual calendar mechanism, in particular also those for which the passage from the 31st of a month to the 1st of the following month is ensured by the small pawl, the large pawl not ensuring while the catch-up function for days at the end of the month of less than 31 days (i.e. 1 to 3 days to catch up).
  • the locking cam which cooperates with the locking sub-mechanism can be configured by those skilled in the art so that the locking sub-mechanism is in the unlocked position at least on the last day of a month less than 31 days when it is necessary to make up the days at the end of the month, by the large pawl (and for example from the 28th of a month with less than 31 days), the blocking sub-mechanism being able to remain in the locked position each day of 31-day months, including for the passage from the 31st to the 1st of the following month by the small ratchet.

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  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Description

La présente invention concerne un dispositif d'actionnement d'une étoile de quantième d'un mécanisme de quantième semi-perpétuel ou perpétuel comprenant une grande bascule agencée d'une part pour pouvoir coopérer avec une came des mois et d'autre part pour actionner chaque jour l'étoile de quantième, ladite grande bascule étant capable de pivoter selon une course d'amplitude variable selon les mois entre une première position initiale d'actionnement définie par l'une des positions de la grande bascule lorsqu'elle est en contact avec la came des mois, et une position finale d'actionnement. La présente invention concerne également une pièce d'horlogerie comprenant un tel dispositif d'actionnement.The present invention relates to a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism comprising a large rocker arranged on the one hand to be able to cooperate with a month cam and on the other hand to actuate the date star each day, said large rocker being capable of pivoting along a travel of variable amplitude depending on the month between a first initial actuation position defined by one of the positions of the large rocker when it is in contact with the months cam, and a final actuation position. The present invention also relates to a timepiece comprising such an actuation device.

Un tel dispositif d'actionnement est traditionnellement utilisé dans un mécanisme de quantième semi-perpétuel ou perpétuel pour entrainer chaque jour l'étoile de quantième ou étoile de 31, solidaire d'un indicateur de quantième affichant la date de jour, en tenant automatiquement compte de la longueur du mois.Such an actuation device is traditionally used in a semi-perpetual or perpetual calendar mechanism to drive the date star or 31 star each day, integral with a date indicator displaying the current date, automatically taking into account the length of the month.

Un tel dispositif d'actionnement est décrit par exemple dans le document EP 1 004 947 A2 .Such an actuation device is described for example in the document EP 1 004 947 A2 .

Dans un mécanisme de quantième semi-perpétuel, le changement de date s'effectue automatiquement à la fin de chaque mois, sauf les mois de février qui seront considérés comme un mois de 30 ou de 29 jours selon la conception du mécanisme. Dans un mécanisme de quantième perpétuel, le changement de date s'effectue automatiquement à la fin de chaque mois, y compris les mois de février que l'année soit bissextile ou non.In a semi-perpetual calendar mechanism, the date changes automatically at the end of each month, except for the months of February which will be considered as a month of 30 or 29 days depending on the design of the mechanism. In a perpetual calendar mechanism, the date changes automatically at the end of each month, including the months of February, whether the year is a leap year or not.

Pour ce faire, la grande bascule est agencée pour parcourir un trajet d'une certaine amplitude entre une position initiale d'actionnement et sa position finale, ladite position initiale d'actionnement correspondant à la position de la grande bascule lorsqu'elle est en appui sur la came des mois. Comme ladite came des mois comporte par exemple des encoches plus ou moins profondes en fonction de la durée du mois (28, 29, 30 ou 31 jours), la position initiale d'actionnement de la grande bascule diffère selon les mois de sorte que l'amplitude de la course de la grande bascule varie selon les mois en fonction de la position de la grande bascule en appui sur la came des mois. Par exemple, lors d'un mois de février d'une année non bissextile, et donc d'une durée de 28 jours, le bec de la grande bascule se trouve dans l'encoche la plus profonde de la came des mois de sorte que l'extrémité de la grande bascule qui entraine l'étoile de quantième s'éloigne au maximum de ladite étoile de quantième. Ainsi, la grande bascule réalisera sa course de la plus grande amplitude pour lui permettre de faire avancer l'étoile de quantième de 4 jours la nuit du 28 février au 1er mars et ainsi de rattraper (c'est-à-dire corriger) les jours de fin de mois. Le problème avec ce mécanisme est que la grande bascule devra faire ce mouvement de grande amplitude tous les jours du mois de février, une telle grande amplitude étant en fait inutile jusqu'au 28 février. Cela induit au niveau du mouvement qui comprend le mécanisme de quantième une consommation d'énergie inutile sur une longue période.To do this, the large rocker is arranged to travel a path of a certain amplitude between an initial position of actuation and its final position, said initial position of actuation corresponding to the position of the large rocker when it is in support on cam for months. As said month cam comprises, for example, more or less deep notches depending on the length of the month (28, 29, 30 or 31 days), the initial position of actuation of the large rocker differs according to the month so that the amplitude of the stroke of the large rocker varies from month to month depending on the position of the large rocker resting on the cam of the months. For example, during a month of February in a non-leap year, and therefore lasting 28 days, the beak of the large rocker is in the deepest notch of the month cam so that the end of the large lever which drives the date star moves as far as possible from said date star. Thus, the large rocker will achieve its greatest amplitude travel to enable it to advance the date star by 4 days on the night of February 28 to March 1 and thus catch up (i.e. correct) month-end days. The problem with this mechanism is that the large rocker will have to make this large amplitude movement every day of the month of February, such a large amplitude being in fact useless until February 28th. This induces, at the level of the movement which includes the date mechanism, an unnecessary consumption of energy over a long period.

Il en est de même les autres mois de moins de 31 jours même si l'amplitude de la course de la grande bascule est moindre.It is the same for the other months of less than 31 days even if the amplitude of the stroke of the large seesaw is less.

De plus, dans les mécanismes de quantième semi-perpétuel ou perpétuel, le bec de la grande bascule est en permanence en appui sur la came des mois afin de lire la durée du mois en cours. Il est donc nécessaire de prévoir un mécanisme pour permettre de dégager la grande bascule de la came des mois avant d'effectuer une correction des mois en agissant sur l'étoile des mois, solidaire de la came des mois. Ce dégagement doit être assez fort pour qu'aucun contact ne vienne perturber le positionnement de l'étoile des mois mais assez faible pour ne pas corriger l'étoile de quantième en soulevant la grande bascule de manière trop importante. De plus la séquence de correction doit respecter la chronologie suivante : soulever la grande bascule, corriger l'étoile des mois, libérer l'étoile des mois pour qu'elle prenne sa nouvelle position, puis enfin libérer la grande bascule. Toute cette séquence doit être réalisée avec une course de correcteur d'environ 1 mm, ce qui rend l'opération de correction de mois très délicate.In addition, in semi-perpetual or perpetual calendar mechanisms, the beak of the large rocker is permanently resting on the month cam in order to read the duration of the current month. It is therefore necessary to provide a mechanism to enable the large lever of the month cam to be disengaged before carrying out a month correction by acting on the month star, integral with the month cam. This release must be strong enough so that no contact disturbs the positioning of the month star, but weak enough not to correct the date star by raising the large rocker too much. In addition, the correction sequence must respect the following chronology: raise the large rocker, correct the month star, release the month star so that it takes its new position, then finally release the large rocker. This entire sequence must be performed with a corrector stroke of approximately 1 mm, which makes the month correction operation very tricky.

La présente invention vise à remédier aux inconvénients des mécanismes d'actionnement d'une étoile de quantième d'un mécanisme de quantième semi-perpétuel ou perpétuel connus en proposant un dispositif d'actionnement permettant d'éviter à la grande bascule de parcourir une course complète tous les jours afin de ne pas consommer inutilement l'énergie du mouvement dans lequel ledit mécanisme de quantième est monté.The present invention aims to remedy the drawbacks of known mechanisms for actuating a date star of a semi-perpetual or perpetual calendar mechanism by proposing an actuating device making it possible to prevent the large rocker from traversing a stroke complete every day so as not to unnecessarily consume the energy of the movement in which said date mechanism is mounted.

Un autre but de la présente invention est de proposer un dispositif d'actionnement d'une étoile de quantième d'un mécanisme de quantième semi-perpétuel ou perpétuel permettant une correction des mois facile à mettre en oeuvre.Another object of the present invention is to provide a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism allowing month correction that is easy to implement.

A cet effet, la présente invention concerne un dispositif d'actionnement d'une étoile de quantième d'un mécanisme de quantième semi-perpétuel ou perpétuel comprenant une grande bascule agencée d'une part pour pouvoir coopérer avec une came des mois et d'autre part pour actionner chaque jour l'étoile de quantième, ladite grande bascule étant capable de pivoter selon une course d'amplitude variable selon les mois entre une première position initiale d'actionnement définie par l'une des positions de la grande bascule lorsqu'elle est en contact avec la came des mois, et une position finale d'actionnement.To this end, the present invention relates to a device for actuating a date star of a semi-perpetual or perpetual calendar mechanism comprising a large rocker arranged on the one hand to be able to cooperate with a month cam and on the other hand to actuate the date star each day, said large rocker being capable of pivoting according to a stroke of variable amplitude depending on the month between a first initial actuation position defined by one of the positions of the large rocker when it is in contact with the months cam, and a final actuation position.

Selon l'invention, ledit dispositif d'actionnement comprend un mécanisme de limitation de la course de la grande bascule entre une seconde position initiale d'actionnement et la position finale d'actionnement, ladite seconde position initiale d'actionnement étant intermédiaire entre la première position initiale d'actionnement et la position finale d'actionnement, ledit mécanisme de limitation comprenant un sous-mécanisme de blocage de la grande bascule mobile entre une position verrouillée dans laquelle la grande bascule est bloquée dans son pivotement pour limiter sa course entre sa seconde position initiale d'actionnement et sa position finale d'actionnement et une position déverrouillée dans laquelle la grande bascule est libre de pivoter entre sa première position initiale d'actionnement et sa position finale d'actionnement, et une came de verrouillage coopérant avec ledit sous-mécanisme de blocage et agencée pour définir les jours pour lesquels le sous-mécanisme de blocage est en position verrouillée ou en position déverrouillée, le sous-mécanisme de blocage étant en position déverrouillée au moins le dernier jour d'un mois de moins de 31 jours où un rattrapage des jours en fin de mois est nécessaire.According to the invention, said actuating device comprises a mechanism for limiting the travel of the large rocker between a second initial actuating position and the final actuating position, said second initial actuating position being intermediate between the first initial actuating position and the final actuating position, said limiting mechanism comprising a sub-mechanism for blocking the large movable rocker between a locked position in which the large rocker is locked in its pivoting to limit its travel between its second initial actuating position and its final actuating position and an unlocked position in which the large rocker is free to pivot between its first initial actuating position and its final actuating position, and a locking cam cooperating with said under - blocking mechanism and arranged to define the days for which the sub-mechanism blocking mechanism is in the locked position or in the unlocked position, the blocking sub-mechanism being in the unlocked position at least on the last day of a month of less than 31 days where a make-up of days at the end of the month is necessary.

Ainsi, le dispositif d'actionnement selon l'invention, grâce à son sous-mécanisme de blocage de la grande bascule, permet de ne pas faire parcourir à ladite grande bascule une course inutile tous les jours.Thus, the actuating device according to the invention, thanks to its blocking sub-mechanism of the large rocker, makes it possible not to cause said large rocker to travel an unnecessary stroke every day.

De plus, la grande bascule étant écartée de la came des mois lorsque le sous-mécanisme de blocage est en position verrouillée, le dispositif d'actionnement selon l'invention permet la correction des mois sans avoir à dégager préalablement la grande bascule de la came des mois, tant que ledit sous-mécanisme de blocage occupe sa position verrouillée.In addition, the large rocker being moved away from the month cam when the blocking sub-mechanism is in the locked position, the actuating device according to the invention allows the months to be corrected without having to first disengage the large rocker from the cam. months, as long as said blocking sub-mechanism occupies its locked position.

La présente invention concerne également une pièce d'horlogerie comprenant un dispositif d'actionnement tel que défini ci-dessus.The present invention also relates to a timepiece comprising an actuation device as defined above.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 représente une vue d'un dispositif d'actionnement d'une étoile de quantième d'un mécanisme de quantième perpétuel selon l'invention au 27 février d'une année non bissextile ;
  • la figure 2 représente une vue du dispositif d'actionnement selon l'invention au 28 février d'une année non bissextile ;
  • la figure 3 représente une vue du dispositif d'actionnement selon l'invention en fin de menée d'un 28 février d'une année non bissextile, le quantième affiché étant passé au 1er mars;
  • la figure 4 représente une vue du dispositif d'actionnement selon l'invention au 1er mars ;
  • la figure 5 représente une vue du dispositif d'actionnement selon l'invention au 28 février d'une année bissextile ;
  • la figure 6 représente une vue du dispositif d'actionnement selon l'invention au 29 février d'une année bissextile ;
  • la figure 7 représente une vue du dispositif d'actionnement selon l'invention au 29 d'un mois de 30 jours;
  • la figure 8 représente une vue du dispositif d'actionnement selon l'invention au 30 d'un mois de 30 jours ;
  • la figure 9 représente une vue du dispositif d'actionnement selon l'invention au 30 d'un mois de 31 jours ; et
  • la figure 10 représente une vue du dispositif d'actionnement selon l'invention au 31 d'un mois de 31 jours.
Other characteristics and advantages of the present invention will appear on reading the following detailed description of an embodiment of the invention, given by way of non-limiting example, and made with reference to the appended drawings in which:
  • there figure 1 shows a view of a device for actuating a date star of a perpetual calendar mechanism according to the invention on February 27 of a non-leap year;
  • there figure 2 represents a view of the actuation device according to the invention on February 28 of a non-leap year;
  • there picture 3 represents a view of the actuating device according to the invention at the end of the period of February 28 of a non-leap year, the date displayed having passed to March 1 ;
  • there figure 4 represents a view of the actuation device according to the invention on March 1;
  • there figure 5 represents a view of the actuation device according to the invention on February 28 of a leap year;
  • there figure 6 represents a view of the actuation device according to the invention on February 29 of a leap year;
  • there figure 7 represents a view of the actuation device according to the invention at the 29th of a month of 30 days;
  • there figure 8 represents a view of the actuation device according to the invention at 30 of a month of 30 days;
  • there figure 9 represents a view of the actuation device according to the invention at 30 of a month of 31 days; And
  • there figure 10 represents a view of the actuation device according to the invention at the 31st of a month of 31 days.

En référence à la figure 1, la présente invention concerne un dispositif d'actionnement 1 d'une étoile de quantième 2 d'un mécanisme de quantième perpétuel au moyen d'une grande bascule 4 montée pivotante sur un élément de bâti du mécanisme en un point de pivotement A. D'une manière connue, la grande bascule 4 est agencée pour pouvoir coopérer avec une came des mois 6 sur laquelle sont programmées les différentes durées des mois d'une année. Dans l'exemple représenté, la came des mois 6 est configurée pour tenir compte automatiquement de la longueur des mois (28, 29, 30 jours, en plus des mois de 31 jours), y compris les années bissextiles, de sorte que le mécanisme représenté ici est un mécanisme de quantième perpétuel.With reference to the figure 1 , the present invention relates to a device 1 for actuating a date star 2 of a perpetual calendar mechanism by means of a large lever 4 pivotally mounted on a frame element of the mechanism at a pivot point A. D In a known manner, the large rocker 4 is arranged to be able to cooperate with a month cam 6 on which the different durations of the months of a year are programmed. In the example shown, the months cam 6 is configured to automatically take into account the length of months (28, 29, 30 days, in addition to 31-day months), including leap years, so that the mechanism represented here is a perpetual calendar mechanism.

D'une manière connue, la came des mois 6 présente sur son pourtour différentes zones correspondant à la durée des différents mois, notamment des secteurs proéminents 8 qui représentent les mois de 31 jours et des encoches 9 représentant les mois de 30 jours. Elle présente en outre une découpe circulaire 10 dans laquelle une came bissextile 12 est déplacée une fois par année de 90° par un mécanisme annexe connu de l'homme du métier qu'il n'est pas nécessaire de décrire plus en détails (croix de Malte par exemple). Le secteur circulaire 12a de cette came bissextile 12 définit les trois années non bissextiles (mois de février de 28 jours), tandis que le secteur saillant 12b définit les mois de février de 29 jours des années bissextiles. Cette came des mois 6 fait un tour en une année.In a known manner, the month cam 6 has on its periphery different zones corresponding to the duration of the different months, in particular prominent sectors 8 which represent the months of 31 days and notches 9 representing the months of 30 days. It also has a circular cutout 10 in which a leap cam 12 is moved once a year by 90° by an ancillary mechanism known to those skilled in the art that it is not necessary to describe in more detail (cross of Malta for example). The circular sector 12a of this leap cam 12 defines the three non-leap years (February of 28 days), while the salient sector 12b defines the months of February of 29 days of the leap years. This 6 month old cam goes around in a year.

Il est bien évident que le mécanisme de quantième utilisé dans la présente invention peut également être semi-perpétuel où seuls les mois de 29 et 30 jours sont gérés automatiquement en plus des mois de 31, la correction des mois de février devant se faire manuellement.It is obvious that the calendar mechanism used in the present invention can also be semi-perpetual where only the months of 29 and 30 days are managed automatically in addition to the months of 31, the correction of the months of February having to be done manually.

Un tel mécanisme de gestion des mois d'un quantième semi-perpétuel ou perpétuel au moyen d'une came des mois et d'une came bissextile est connu de l'homme du métier et ne nécessite pas de description plus détaillée.Such a mechanism for managing the months of a semi-perpetual or perpetual calendar by means of a month cam and a leap cam is known to those skilled in the art and does not require a more detailed description.

La grande bascule 4 peut coopérer avec la came des mois 6 au moyen de son bec 14 prévue à sa première extrémité, ici son extrémité supérieure par rapport à A. Ainsi, la grande bascule 4 est capable de pivoter en A selon une course d'amplitude variable selon les mois entre une première position initiale d'actionnement, qui diffère selon les mois, définie par l'une des différentes positions de la grande bascule 4 lorsqu'elle est en contact avec l'une des différentes zones de la came des mois 6, et une position finale d'actionnement, en fin de menée, lorsque la grande bascule 4 a terminé d'entrainer l'étoile de quantième 2.The large rocker 4 can cooperate with the month cam 6 by means of its beak 14 provided at its first end, here its upper end with respect to A. Thus, the large rocker 4 is able to pivot in A according to a stroke of variable amplitude depending on the month between a first initial actuation position, which differs depending on the month, defined by one of the different positions of the large rocker 4 when it is in contact with one of the different zones of the cam of the month 6, and a final actuation position, at the end of the driven, when the large rocker 4 has finished driving the date star 2.

A sa seconde extrémité, ici son extrémité inférieure par rapport à A, la grande bascule 4 est agencée pour actionner chaque jour l'étoile de quantième 2 de manière à afficher le quantième suivant au moyen de l'index 15.At its second end, here its lower end with respect to A, the large rocker 4 is arranged to actuate the date star 2 each day so as to display the following date by means of the index 15.

A cet effet, la grande bascule 4 comprend, d'une manière connue, un petit cliquet 16 agencé pour coopérer spécifiquement avec la denture de l'étoile de quantième 2 et un grand cliquet 18 monté pivotant sur la grande bascule 4 et agencé pour coopérer avec une came de rattrapage des jours de fin de mois 20, solidaire de l'étoile de quantième 2, au moins pour rattraper les jours en fin de mois de moins de 31 jours.To this end, the large rocker 4 comprises, in a known manner, a small pawl 16 arranged to cooperate specifically with the toothing of the date star 2 and a large pawl 18 pivotally mounted on the large rocker 4 and arranged to cooperate with an end-of-month days catch-up cam 20, integral with the date star 2, at least to catch up on the days at the end of the month of less than 31 days.

D'une manière avantageuse, le grand cliquet 18 est également agencé pour coopérer avec la came de rattrapage des jours de fin de mois 20 pour le passage du dernier jour d'un mois au 1er du mois suivant, quel que soit le mois, et donc y compris les mois de 31 jours. Ainsi, le grand cliquet 18 est actif le dernier jour de chaque mois, au moins pour effectuer le passage du 31 du mois au 1er du mois suivant, et également les mois de moins de 31 jours pour rattraper les jours de fin de mois.Advantageously, the large pawl 18 is also arranged to cooperate with the end-of-month days catch-up cam 20 for the passage from the last day of a month to the 1st of the following month, whatever the month, and therefore including months of 31 days. Thus, the large pawl 18 is active on the last day of each month, at least to make the passage from the 31st of the month to the 1st of the following month, and also the months of less than 31 days to catch up with the end of month days.

De préférence, le petit cliquet 16 est agencé pour coopérer directement avec l'étoile de quantième 2 pour l'entrainer d'un pas par jour du 1er au dernier jour d'un mois et le grand cliquet 18, en tombant dans une encoche 22 prévue sur la came de rattrapage des jours de fin de mois 20 le dernier jour d'un mois, coopère avec ladite came de rattrapage des jours de fin de mois 20 lors du passage du dernier jour d'un mois au premier jour du mois suivant pour la déplacer du nombre de pas correspondant au nombre de jours nécessaires jusqu'à ce que l'étoile de quantième 2, solidaire de la came 20, atteigne une position correspondant au 1er jour du mois suivant. Ainsi, le grand cliquet 18 déplacera la came 20 d'un jour en fin de mois de 31 jours, de deux jours en fin de mois de 30 jours, de trois jours en fin d'un mois de février de 29 jours d'une année bissextile ou de quatre jours en fin d'un mois de février de 28 jours d'une année non bissextile, afin de passer au 1er du mois suivant.Preferably, the small pawl 16 is arranged to cooperate directly with the date star 2 to drive it one step per day from the 1st to the last day of a month and the large pawl 18, by falling into a notch 22 provided on the end-of-month days catch-up cam 20 on the last day of a month, cooperates with said month-end days catch-up cam 20 when passing from the last day of a month to the first day of the month to move it by the number of steps corresponding to the number of days required until the date star 2, secured to the cam 20, reaches a position corresponding to the 1st day of the following month. Thus, the large pawl 18 will move the cam 20 by one day at the end of the month by 31 days, by two days at the end of the month by 30 days, by three days at the end of the month of February by 29 days by one leap year or four days at the end of a month of February of 28 days of a non-leap year, in order to pass to the 1st of the following month.

L'homme du métier sait comment déterminer la configuration de la came de rattrapage des jours de fin de mois 20 et, notamment la position et la longueur de son encoche 22, ainsi que la profondeur des encoches 9 et la hauteur des secteurs proéminents 8, de même que le diamètre du secteur circulaire 12a de la came bissextile 12 et le diamètre du secteur saillant 12b de la came des mois 6, pour obtenir le fonctionnement du grand cliquet 18 décrit ci-dessus.A person skilled in the art knows how to determine the configuration of the month-end day catch-up cam 20 and, in particular the position and length of its notch 22, as well as the depth of the notches 9 and the height of the prominent sectors 8, as well as the diameter of the circular sector 12a of the leap cam 12 and the diameter of the projecting sector 12b of the month cam 6, to obtain the operation of the large pawl 18 described above.

D'une manière traditionnelle, le pivotement en A de la grande bascule 4 est commandé chaque jour par une roue de 24 heures (non représentée).Traditionally, the pivoting in A of the large lever 4 is controlled each day by a 24-hour wheel (not shown).

Conformément à la présente invention, le dispositif d'actionnement 1 comprend un mécanisme de limitation de la course de la grande bascule 4 entre une seconde position initiale d'actionnement, sans contact avec la came des mois 6, et la position finale d'actionnement, ladite seconde position initiale étant intermédiaire entre la première position initiale et la position finale de sorte que la course de la grande bascule 4 est limitée.In accordance with the present invention, the actuating device 1 comprises a mechanism for limiting the travel of the large lever 4 between a second initial actuating position, without contact with the month cam 6, and the final actuating position , said second initial position being intermediate between the first initial position and the final position so that the stroke of the large rocker 4 is limited.

A cet effet, ledit mécanisme de limitation comprend un sous-mécanisme de blocage 24 de la grande bascule 4 mobile entre une position verrouillée dans laquelle la grande bascule 4 est bloquée dans son pivotement pour limiter sa course entre sa seconde position initiale et sa position finale et une position déverrouillée dans laquelle la grande bascule 4 est libre de pivoter entre sa première position initiale et sa position finale, et une came de verrouillage coopérant avec ledit sous-mécanisme de blocage 24 et agencée pour définir les jours pour lesquels le sous-mécanisme de blocage 24 est en position verrouillée afin de limiter la course de la grande bascule 4 ou en position déverrouillée afin de ne pas limiter la course de la grande bascule 4, le sous-mécanisme de blocage 24 étant en position déverrouillée au moins le dernier jour d'un mois de moins de 31 jours, où un rattrapage (c'est-à-dire une correction) des jours en fin de mois est nécessaire.To this end, said limiting mechanism comprises a locking sub-mechanism 24 of the large rocker 4 movable between a locked position in which the large rocker 4 is locked in its pivoting to limit its travel between its second initial position and its final position. and an unlocked position in which the large rocker 4 is free to pivot between its first initial position and its final position, and a locking cam cooperating with said locking sub-mechanism 24 and arranged to define the days for which the sub-mechanism locking mechanism 24 is in the locked position in order to limit the stroke of the large rocker 4 or in the unlocked position so as not to limit the stroke of the large rocker 4, the locking sub-mechanism 24 being in the unlocked position at least on the last day a month with less than 31 days, where a catch-up (i.e. a correction) of the days at the end of the month is necessary.

D'une manière particulièrement avantageuse, la came de verrouillage est constituée par la came de rattrapage des jours de fin de mois 20. Il est bien évident que la came de verrouillage peut être constituée par une came spécifique à cette fonction, indépendante de la came de rattrapage des jours de fin de mois 20. La double fonction de la came 20 de rattrapage des jours et de verrouillage du sous-mécanisme de blocage 24 permet de réduire le nombre de pièces du mécanisme ainsi que son encombrement.In a particularly advantageous manner, the locking cam is constituted by the end-of-month days catch-up cam 20. It is obvious that the locking cam can be constituted by a cam specific to this function, independent of the cam end-of-month days 20. The dual function of the cam 20 for catching up with the days and for locking the locking sub-mechanism 24 makes it possible to reduce the number of parts of the mechanism as well as its size.

Pour être adaptée au fonctionnement du grand cliquet 18 décrit ci-dessus, la came de verrouillage, c'est-à-dire ici la came de rattrapage des jours 20, est configurée pour maintenir le sous-mécanisme de blocage 24 en position verrouillée du 1er au 27 d'un mois, les jours où aucun rattrapage de fin de mois n'est nécessaire, et en position déverrouillée du 28 jusqu'au dernier jour du mois, quel que soit le mois.To be adapted to the operation of the large pawl 18 described above, the locking cam, that is to say here the day catch-up cam 20, is configured to maintain the locking sub-mechanism 24 in the locked position of the 1st to 27th of a month, on days when no end-of-month adjustment is necessary, and in the unlocked position from the 28th to the last day of the month, whatever the month.

Il est bien évident que d'autres configurations de came de verrouillage sont possibles, en particulier lorsque la came de verrouillage est dédiée spécifiquement à cette fonction. La came de verrouillage peut par exemple être configurée comme une came annuelle gérant le déverrouillage du sous-mécanisme de blocage en fin de mois de chaque mois sur une année, agencée pour prendre en compte la came des mois 6.It is quite obvious that other locking cam configurations are possible, in particular when the locking cam is dedicated specifically to this function. The locking cam can for example be configured as an annual cam managing the unlocking of the locking sub-mechanism at the end of the month of each month over a year, arranged to take into account the month 6 cam.

D'une manière avantageuse, le sous-mécanisme de blocage 24 comprend un verrou 26, monté pivotant sur le bâti en B, agencé pour bloquer la grande bascule 4 dans son pivotement en position verrouillée, et une bascule 28, également montée pivotante sur le bâti en C, commandant le verrou 26 et agencée pour lire sur la came de verrouillage/rattrapage 20 une information relative aux jours pour lesquels le sous-mécanisme de blocage 24 est en position verrouillée ou en position déverrouillée.Advantageously, the locking sub-mechanism 24 comprises a latch 26, pivotally mounted on the frame at B, arranged to lock the large rocker 4 in its pivoting in the locked position, and a rocker 28, also pivotally mounted on the C-shaped frame, controlling the lock 26 and arranged to read on the locking/recovery cam 20 information relating to the days for which the locking sub-mechanism 24 is in the locked position or in the unlocked position.

Le verrou 26 est constitué d'un bras rectiligne monté pivotant en B à l'une de ses extrémités et présentant à son autre extrémité un bec 26a qui forme à l'arrière, dans le prolongement du bras, une proéminence 29 dirigée vers la grande bascule 4. Cette proéminence 29 constitue une butée sur laquelle s'appuie et bute une goupille 30, solidaire de l'extrémité inférieure de la grande bascule 4, lorsque le sous-mécanisme de blocage 24 est en position verrouillée, définissant la seconde position initiale d'actionnement de la grande bascule 4.The lock 26 consists of a rectilinear arm pivotally mounted at B at one of its ends and having at its other end a beak 26a which forms at the rear, in the extension of the arm, a prominence 29 directed towards the large rocker 4. This prominence 29 constitutes an abutment against which a pin 30 rests and abuts, integral with the lower end of the large rocker 4, when the locking sub-mechanism 24 is in the locked position, defining the second initial position actuation of the large rocker 4.

L'extrémité libre du bec 26a est agencée pour s'appuyer et s'articuler sur une goupille 32 prévue sur la bascule 28 afin d'évoluer entre la position verrouillée et la position déverrouillée. La bascule 28 comprend également un palpeur 28a agencé pour coopérer avec la came de verrouillage/rattrapage 20 et lire l'information relative aux jours pour lesquels le sous-mécanisme de blocage 24 est en position verrouillée ou en position déverrouillée.The free end of beak 26a is arranged to rest and articulate on a pin 32 provided on rocker 28 in order to move between the locked position and the unlocked position. Rocker 28 also includes a feeler 28a arranged to cooperate with locking/recovery cam 20 and read the information relating to the days for which locking sub-mechanism 24 is in the locked position or in the unlocked position.

Il est bien évident que le verrou et la bascule peuvent être remplacés par un organe de blocage d'une seule pièce configuré pour assurer la double fonction de butée et de lecture sur la came de verrouillage.It is obvious that the latch and the latch can be replaced by a one-piece locking member configured to provide the dual function of abutment and reading on the locking cam.

Le verrou 26 et la bascule 28 du sous-mécanisme de blocage 24 ainsi que la came de verrouillage/rattrapage 20 sont configurés pour qu'en position verrouillée du sous-mécanisme de blocage 24, la bascule 28 soulevée en position haute par la came 20 en fonction des jours lus par le palpeur 28a, soulève elle-même suffisamment le verrou 26, par la goupille 32, pour que la proéminence 29 se place sur le chemin de la goupille 30 afin de bloquer la grande bascule 4 dans sa seconde position initiale d'actionnement quand elle souhaite revenir dans sa première position initiale après avoir entrainé l'étoile de quantième 2, directement par le petit cliquet 16 du 1er au 27 du mois ou indirectement via la came de rattrapage 20 par le grand cliquet 18 après l'éventuel rattrapage des jours de fin de mois et le passage du 31 au 1er du mois suivant.The latch 26 and the rocker 28 of the locking sub-mechanism 24 as well as the locking/recovery cam 20 are configured so that in the locked position of the blocking sub-mechanism 24, the rocker 28 raised in the high position by the cam 20 according to the days read by the sensor 28a, itself raises the lock 26 sufficiently, by the pin 32, so that the prominence 29 is placed on the path of the pin 30 in order to block the large rocker 4 in its second initial actuating position when it wishes to return to its first initial position after having driven the date star 2, directly by the small pawl 16 of the 1 st on the 27th of the month or indirectly via the catch-up cam 20 by the large pawl 18 after the possible catch-up of the days at the end of the month and the passage from the 31st to the 1st of the following month.

A partir du 28 du mois et tant que le 1er du mois suivant n'est pas passé, le verrou 26 et la bascule 28 du sous-mécanisme de blocage 24 ainsi que la came de verrouillage/rattrapage 20 sont configurés pour qu'en position déverrouillée du sous-mécanisme de blocage 24, la bascule 28 est tombée en position basse dans l'encoche 22 de la came 20 de sorte que le verrou 26 est également tombé en éloignant sa proéminence 29 du chemin de la goupille 30. Ainsi, la grande bascule 4 n'est pas bloquée dans son pivotement et peut revenir dans sa première position initiale après avoir entrainé l'étoile de quantième 2 directement par le petit cliquet 16 chaque jour du 28 jusqu'au dernier jour du mois.From the 28th of the month and as long as the 1st of the following month has not passed, the lock 26 and the rocker 28 of the locking sub-mechanism 24 as well as the locking/recovery cam 20 are configured so that in unlocked position of the locking sub-mechanism 24, the rocker 28 has fallen into the low position in the notch 22 of the cam 20 so that the lock 26 has also fallen by moving its prominence 29 away from the path of the pin 30. Thus, the large rocker 4 is not blocked in its pivoting and can return to its first initial position after having driven the date star 2 directly by the small pawl 16 each day from the 28th until the last day of the month.

D'une manière particulièrement avantageuse, lorsque la course de la grande bascule 4 est limitée du fait de son blocage dans sa deuxième position initiale d'actionnement, intermédiaire entre la première position initiale d'actionnement et la position finale d'actionnement, la grande bascule 4 est moins inclinée vers l'avant (en direction de la came des mois) que dans sa première position initiale d'actionnement. En conséquence, le bec 14 de la grande bascule n'est pas en appui sur la came des mois 6 tant que le sous-mécanisme de blocage 24 est en position verrouillée. Il n'y a donc pas de contact entre le bec 14 de la grande bascule 4 et la came des mois 6 tant que la grande bascule 4 est bloquée dans son pivotement dans sa seconde position initiale d'actionnement et ne peut pas revenir dans sa première position initiale d'actionnement. Ainsi, il est possible de corriger la came des mois 6 entre le 1er et le 27 du mois sans avoir à soulever préalablement la grande bascule 4.In a particularly advantageous manner, when the stroke of the large rocker 4 is limited due to its locking in its second initial actuating position, intermediate between the first initial actuating position and the final actuating position, the large Rocker 4 is less inclined forward (in the direction of the month cam) than in its first initial actuating position. Consequently, the beak 14 of the large rocker is not resting on the month cam 6 as long as the blocking sub-mechanism 24 is in the locked position. There is therefore no contact between the beak 14 of the large rocker 4 and the month cam 6 as long as the large rocker 4 is blocked in its pivoting in its second initial position of actuation and cannot return to its first initial actuation position. Thus, it is possible to correct the cam months 6 between the 1st and the 27th of the month without having to lift the large rocker 4 beforehand.

En référence aux figures 1 à 3, lors d'un mois de février de 28 jours, soit une année non bissextile, le sous-mécanisme de blocage 24 est en position verrouillée comme représenté sur la figure 1 du 1er au 27 février. Le palpeur 28a de la bascule 28 glisse sur le contour circulaire de plus grand diamètre de la came de verrouillage/rattrapage 20, de sorte qu'il occupe une position haute afin de soulever et maintenir le verrou 26 en position verrouillée, bloquant la grande bascule 4 dans sa seconde position initiale d'actionnement. Le changement de quantième est effectué chaque jour par le petit cliquet 16, le grand cliquet 18 glissant sur le contour circulaire de plus grand diamètre de la came de verrouillage/rattrapage 20 étant inactif. En parallèle, on notera que le bec 14 de la grande bascule n'est pas au contact de la came des mois 6 de sorte qu'une correction de la came des mois 6 est possible sans avoir à soulever au préalable la grande bascule 4.With reference to figures 1 to 3 , during a month of February of 28 days, i.e. a non-leap year, the blocking sub-mechanism 24 is in the locked position as represented on the figure 1 from February 1 to 27. The feeler 28a of the rocker 28 slides over the larger diameter circular contour of the locking/recovery cam 20, so that it occupies a raised position in order to raise and hold the latch 26 in the locked position, locking the large rocker 4 in its second initial actuating position. The date change is performed each day by the small pawl 16, the large pawl 18 sliding on the larger diameter circular contour of the locking/recovery cam 20 being inactive. In parallel, it will be noted that the beak 14 of the large rocker is not in contact with the month cam 6 so that a correction of the month cam 6 is possible without having to raise the large rocker 4 beforehand.

Dans la nuit du 27 au 28 février, le passage au dernier jour du mois s'effectue par le petit cliquet 16. L'étoile de quantième 2 avançant d'un pas avec la came de verrouillage/rattrapage 20, le palpeur 28a de la bascule 28 tombe en position basse dans l'encoche 22 de la came 20 de sorte que le verrou 26 passe en position déverrouillée. Cela permet à la grande bascule 4, à la fin de sa fonction de menée, de revenir dans celle de ses premières positions initiales d'actionnement qui correspond dans ce cas à la position de la grande bascule 4 lorsque son bec 14 est en appui contre le secteur circulaire 12a de la came bissextile 12, comme le montre la figure 2. Cela permet également au grand cliquet 18 de se positionner en regard de l'encoche 22 de la came de verrouillage/rattrapage 20 en vue du rattrapage des jours de fin de mois et du passage au 1er mars.On the night of February 27 to 28, the passage to the last day of the month is effected by the small pawl 16. The date star 2 advancing by one step with the locking/recovery cam 20, the feeler 28a of the Latch 28 falls into the down position in the notch 22 of the cam 20 so that the lock 26 passes into the unlocked position. This allows the large rocker 4, at the end of its driven function, to return to that of its first initial actuation positions which corresponds in this case to the position of the large rocker 4 when its beak 14 is resting against the circular sector 12a of the leap cam 12, as shown in the figure 2 . This also allows the large pawl 18 to position itself opposite the notch 22 of the locking/recovery cam 20 with a view to recovering the days of the end of the month and the transition to March 1st .

Dans la nuit du 28 février au 1er mars, le grand cliquet 18 en s'engageant dans l'encoche 22 agit sur la came de verrouillage/rattrapage 20. Le petit cliquet 16 est inactif. Le bec 14 de la grande bascule 4 se trouvant sur le secteur 12a le plus intérieur de la came des mois 6, ladite grande bascule 4 réalise la course complète ayant la plus grande amplitude entre sa première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui sur le secteur 12a et sa position finale d'actionnement, permettant au grand cliquet 18 de faire avancer l'étoile de quantième 2 de 4 jours via la came de verrouillage/rattrapage 20 (3 jours de rattrapage du 28 au 31 et un jour du 31 au 1er). En parallèle, la came des mois 6 a tourné pour passer au mois suivant, le mois de mars dans ce cas. Le dimensionnement de l'encoche 22 est tel qu'en fin de menée lors du passage au 1er mars, le palpeur 28a de la bascule a repris sa position haute sur la came 20 de sorte que le verrou 26 pivote de nouveau en position verrouillée comme le montre la figure 3. Ainsi, lorsque la grande bascule 4 souhaite revenir dans sa première position initiale d'actionnement une fois le passage au 1er mars effectué, la goupille 30 de la grande bascule 4 rencontre la proéminence 29 du verrou 26 de sorte que la grande bascule 4 est de nouveau bloquée par le verrou 26 dans sa seconde position initiale d'actionnement, comme le montre la figure 4. Le dimensionnement de l'encoche 22 est prévu pour que le grand cliquet 18, qui reste dans l'encoche 22 les premiers jours du mois, s'y positionne de manière à ne plus être actif, avant de glisser de nouveau sur le contour de plus grand diamètre de la came 20.During the night of February 28 to March 1, the large pawl 18 by engaging in the notch 22 acts on the locking/recovery cam 20. The small pawl 16 is inactive. The beak 14 of the large rocker 4 being on the innermost sector 12a of the months cam 6, said large rocker 4 carries out the complete stroke having the greatest amplitude between its first initial actuation position corresponding to the position of the large rocker 4 when it is resting on the sector 12a and its final actuation position, allowing the large pawl 18 to advance the 4-day date star 2 via locking/recovery cam 20 (3-day recovery from 28 to 31 and one day from 31 to 1 ). In parallel, the 6 month cam rotated to move on to the next month, March in this case. The dimensioning of the notch 22 is such that at the end of the run during the passage to March 1 , the feeler 28a of the rocker has resumed its high position on the cam 20 so that the lock 26 pivots again in the locked position. as shown in picture 3 . Thus, when the large rocker 4 wishes to return to its first initial position of actuation once the passage to March 1 has been made, the pin 30 of the large rocker 4 encounters the prominence 29 of the lock 26 so that the large rocker 4 is again blocked by the lock 26 in its second initial actuating position, as shown in the figure 4 . The dimensioning of the notch 22 is provided so that the large pawl 18, which remains in the notch 22 the first days of the month, is positioned there so as to no longer be active, before sliding again on the contour of largest cam diameter 20.

Les années bissextiles, lorsque le mois de février comporte 29 jours, le sous-mécanisme de blocage 24 est en position verrouillée de sorte que la grande bascule 4 est bloquée dans sa seconde position initiale d'actionnement du 1er au 27 février, comme représenté sur la figure 1.In leap years, when the month of February has 29 days, the locking sub-mechanism 24 is in the locked position so that the large rocker 4 is locked in its second initial position of actuation from February 1 to February 27, as shown on the figure 1 .

Dans la nuit du 27 au 28 février, l'actionnement de l'étoile de quantième 2 par le petit cliquet 16 pour passer au 28 fait tomber la bascule 28 dans l'encoche 22 de la came 20 de sorte que le verrou 26 passe en position déverrouillée. Cela permet à la grande bascule 4, à la fin de sa fonction de menée, de revenir dans celle de ses premières positions initiales d'actionnement qui correspond dans ce cas à la position de la grande bascule 4 lorsque son bec 14 est en appui contre le secteur saillant 12b de la came bissextile 12, comme le montre la figure 5.On the night of February 27 to 28, actuation of date star 2 by small pawl 16 to switch to 28 causes rocker 28 to fall into notch 22 of cam 20 so that lock 26 switches to unlocked position. This allows the large rocker 4, at the end of its driven function, to return to that of its first initial actuation positions which corresponds in this case to the position of the large rocker 4 when its beak 14 is resting against the salient sector 12b of the leap cam 12, as shown in the figure 5 .

Le passage du 28 au 29 février se fait par le petit cliquet 16, la grande bascule 4 effectuant alors une course complète entre sa première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui sur le secteur 12b et sa position finale d'actionnement. Le dimensionnement de l'encoche 22 est tel que, l'étoile de quantième 2 avançant d'un pas avec la came de verrouillage/rattrapage 20, lorsque la grande bascule 4 termine sa fonction de menée et retombe, le grand cliquet 18 tombe dans ladite encoche 22 de la came de verrouillage/rattrapage 20, le dernier jour du mois, en vue du rattrapage des jours de fin de mois et du passage au 1er mars, comme le montre la figure 6.The passage from February 28 to 29 is made by the small pawl 16, the large rocker 4 then performing a complete stroke between its first initial position of actuation corresponding to the position of the large rocker 4 when it is resting on the sector 12b and its final actuation position. The dimensioning of the notch 22 is such that, the date star wheel 2 advancing by one step with the locking/catch-up cam 20, when the large rocker 4 completes its driven function and falls back, the large pawl 18 falls into said notch 22 of the locking/catch-up cam 20, on the last day of the month, with a view to catching up with the end-of-month days and the transition to March 1 , as shown in the figure 6 .

Dans la nuit du 29 février au 1er mars, le grand cliquet 18 positionné dans l'encoche 22 agit sur la came de verrouillage/rattrapage 20. Le petit cliquet 16 est inactif. Le bec 14 de la grande bascule 4 se trouvant sur le secteur 12b de la came bissextile 12, ladite grande bascule 4 réalise une course complète entre la première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui sur le secteur 12b et sa position finale d'actionnement, permettant au grand cliquet 18 de faire avancer l'étoile de quantième 2 de 3 jours via la came de verrouillage/rattrapage 20 (2 jours de rattrapage du 29 au 31 et un jour du 31 au 1er). En fin de menée lors du passage au 1er mars, la bascule 28 reprend sa position haute sur la came 20 de sorte que le verrou 26 pivote de nouveau en position verrouillée et la grande bascule 4, à la fin de sa fonction de menée, est de nouveau bloquée dans sa seconde position initiale d'actionnement, comme le montre la figure 4.During the night of February 29 to March 1, the large pawl 18 positioned in the notch 22 acts on the locking/recovery cam 20. The small pawl 16 is inactive. The beak 14 of the large rocker 4 being on the sector 12b of the leap cam 12, said large rocker 4 carries out a complete stroke between the first initial position of actuation corresponding to the position of the large rocker 4 when it is in pressure on the sector 12b and its final actuating position, allowing the large pawl 18 to advance the date star 2 by 3 days via the locking/recovery cam 20 (2 remedial days from 29 to 31 and one day from 31 to 1 st ). At the end of the run during the transition to March 1 , the rocker 28 resumes its high position on the cam 20 so that the lock 26 pivots again in the locked position and the large rocker 4, at the end of its driven function, is again locked in its second initial actuating position, as shown in the figure 4 .

Lorsqu'un mois comporte 30 jours, dans la nuit du 27 au 28 de ce mois, l'actionnement de l'étoile de quantième 2 par le petit cliquet 16 pour passer au 28 fait tomber la bascule 28 dans l'encoche 22 de la came 20 de sorte que le verrou 26 passe en position déverrouillée. Cela permet à la grande bascule 4, à la fin de sa fonction de menée, de revenir dans celle de ses premières positions initiales d'actionnement qui correspond dans ce cas à la position de la grande bascule 4 lorsque son bec 14 est en appui contre l'encoche 9 de la came des mois 6, comme le montre la figure 7.When a month has 30 days, on the night of the 27th to the 28th of this month, the actuation of the date star 2 by the small pawl 16 to switch to 28 causes the rocker 28 to fall into the notch 22 of the cam 20 so that the lock 26 moves into the unlocked position. This allows the large rocker 4, at the end of its driven function, to return to that of its first initial actuation positions which corresponds in this case to the position of the large rocker 4 when its beak 14 bears against the notch 9 of the months cam 6, as shown in the figure 7 .

Les passages du 28 au 29 puis du 29 au 30 du mois se font par le petit cliquet 16, la grande bascule 4 effectuant alors chaque jour une course complète entre sa première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui contre l'encoche 9 et sa position finale d'actionnement. Le dimensionnement de l'encoche 22 est tel que le grand cliquet 18 tombe dans ladite encoche 22 de la came de verrouillage/rattrapage 20 le 30, dernier jour du mois, en vue du rattrapage des jours de fin de mois et du passage au 1er du mois suivant, comme le montre la figure 8.The passages from the 28th to the 29th then from the 29th to the 30th of the month are made by the small pawl 16, the large rocker 4 then performing a complete stroke each day between its first initial position of actuation corresponding to the position of the large rocker 4 when 'it bears against the notch 9 and its final actuation position. The dimensioning of the notch 22 is such that the large pawl 18 falls into said notch 22 of the locking/recovery cam 20 on the 30th, last day of the month, with a view to catching up on the end of month days and switching to 1 st of the following month, as shown in the figure 8 .

Dans la nuit du 30 au 1er du mois suivant, le grand cliquet 18 positionné dans l'encoche 22 agit sur la came de verrouillage/rattrapage 20. Le petit cliquet 16 est inactif. Le bec 14 de la grande bascule 4 se trouvant dans l'encoche 9 de la came des mois 6, ladite grande bascule 4 réalise une course complète entre sa première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui contre l'encoche 9 et sa position finale d'actionnement, permettant au grand cliquet 18 de faire avancer l'étoile de quantième 2 de 2 jours via la came de verrouillage/rattrapage 20 (1 jour de rattrapage du 30 au 31 et un jour du 31 au 1er). En fin de menée lors du passage au 1er du mois suivant, la bascule 28 reprend sa position haute sur la came 20 de sorte que le verrou 26 pivote de nouveau en position verrouillée et la grande bascule 4, à la fin de sa fonction de menée, est de nouveau bloquée dans sa seconde position initiale d'actionnement, comme le montre la figure 4.During the night of the 30th to the 1st of the following month, the large pawl 18 positioned in the notch 22 acts on the locking/recovery cam 20. The small pawl 16 is inactive. The beak 14 of the large rocker 4 being in the notch 9 of the month cam 6, said large rocker 4 realizes a complete stroke between its first initial position of actuation corresponding to the position of the large rocker 4 when it rests against the notch 9 and its final actuating position, allowing the large pawl 18 to advance the date star 2 by 2 days via the locking/recovery cam 20 (1 remedial day from 30 to 31 and one day from the 31st to the 1st ). At the end of the run when switching to the 1st day of the following month, rocker 28 resumes its high position on cam 20 so that lock 26 pivots again into the locked position and large rocker 4, at the end of its function of driven, is again locked in its second initial actuating position, as shown in the figure 4 .

Lorsqu'un mois comporte 31 jours, dans la nuit du 27 au 28 de ce mois, l'actionnement de l'étoile de quantième 2 par le petit cliquet 16 pour passer au 28 fait tomber la bascule 28 dans l'encoche 22 de la came 20 de sorte que le verrou 26 passe en position déverrouillée. Cela permet à la grande bascule 4, à la fin de sa fonction de menée, de revenir dans celle de ses premières positions initiales d'actionnement qui correspond dans ce cas à la position de la grande bascule 4 lorsque son bec 14 est en appui contre le secteur proéminent 8 de la came des mois 6, comme le montre la figure 9.When a month has 31 days, on the night of the 27th to the 28th of this month, the actuation of the date star 2 by the small pawl 16 to switch to 28 causes the rocker 28 to fall into the notch 22 of the cam 20 so that the lock 26 moves into the unlocked position. This allows the large rocker 4, at the end of its driven function, to return to that of its first initial actuation positions which corresponds in this case to the position of the large rocker 4 when its beak 14 bears against the prominent sector 8 of the cam of the months 6, as shown in the figure 9 .

Les passages du 28 au 29, du 29 au 30 puis du 30 au 31 du mois se font par le petit cliquet 16, la grande bascule 4 effectuant alors chaque jour une course complète entre sa première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui contre le secteur 8 et sa position finale d'actionnement, cette course étant d'amplitude plus faible que la course de la bascule lors d'un mois de 28 jours. Le dimensionnement de l'encoche 22 est tel que le grand cliquet 18 tombe dans ladite encoche 22 de la came de verrouillage/rattrapage 20 le 31, dernier jour du mois, en vue du passage au 1er du mois suivant, comme le montre la figure 10.The passages from 28 to 29, from 29 to 30 then from 30 to 31 of the month are made by the small pawl 16, the large lever 4 then performing a complete stroke each day between its first initial position of actuation corresponding to the position of the large rocker 4 when it bears against the sector 8 and its final actuation position, this stroke being of lower amplitude than the stroke of the rocker during a month of 28 days. The dimensioning of the notch 22 is such that the large pawl 18 falls into said notch 22 of the locking/recovery cam 20 on the 31st, last day of the month, with a view to the transition to the 1st of the following month, as shown in figure 10 .

Dans la nuit du 31 au 1er du mois suivant, le grand cliquet 18 positionné dans l'encoche 22 agit sur la came de verrouillage/rattrapage 20. Le petit cliquet 16 est inactif. Le bec 14 de la grande bascule 4 se trouvant sur le secteur proéminent 8 de la came des mois 6, ladite grande bascule 4 réalise une course complète entre sa première position initiale d'actionnement correspondant à la position de la grande bascule 4 lorsqu'elle est en appui contre le secteur 8 et sa position finale d'actionnement, permettant au grand cliquet 18 de faire avancer l'étoile de quantième 2 d'un seul jour via la came de verrouillage/rattrapage 20 pour passer du 31 au 1er du mois suivant. En fin de menée lors du passage au 1er du mois suivant, la bascule 28 reprend sa position haute sur la came 20 de sorte que le verrou 26 pivote de nouveau en position verrouillée et la grande bascule 4, à la fin de sa fonction de menée, est de nouveau bloquée dans sa seconde position initiale d'actionnement, comme le montre la figure 4.During the night of the 31st to the 1st of the following month, the large pawl 18 positioned in the notch 22 acts on the locking/recovery cam 20. The small pawl 16 is inactive. The beak 14 of the large rocker 4 being on the prominent sector 8 of the months cam 6, said large rocker 4 achieves a complete stroke between its first initial position of actuation corresponding to the position of the large rocker 4 when it is resting against the sector 8 and its final actuating position, allowing the large pawl 18 to advance the date star 2 by a single day via the locking/recovery cam 20 to pass from 31 to 1 st of the next month. At the end of the run when switching to the 1st day of the following month, rocker 28 resumes its high position on cam 20 so that lock 26 pivots again into the locked position and large rocker 4, at the end of its function of driven, is again locked in its second initial actuating position, as shown in the figure 4 .

Le dispositif d'actionnement selon l'invention permet de limiter la course de la grande bascule du 1er au 27 du mois, jours pour lesquels un rattrapage de fin de mois ne sera jamais nécessaire, de sorte que la grande bascule n'a pas à parcourir inutilement une course de grande amplitude ces jours-là. La grande bascule fera une course complète entre sa première position initiale d'actionnement, qui diffère selon les mois en fonction de la position de la grande bascule lorsqu'elle est en appui sur la came des mois, et sa position finale d'actionnement, uniquement les 28, 29, 30 et 31 dans la variante représentée.The actuating device according to the invention makes it possible to limit the travel of the large rocker from the 1st to the 27th of the month, days for which an end-of-month adjustment will never be necessary, so that the large rocker does not have needlessly run a high amplitude race on those days. The large rocker will make a full stroke between its first initial position of actuation, which differs depending on the month depending on the position of the large rocker when it rests on the month cam, and its final actuation position, only 28, 29, 30 and 31 in the variant shown.

De plus, le dispositif d'actionnement selon l'invention permet de corriger la came des mois du 1er au 27 du mois sans avoir à dégager préalablement la grande bascule de la came des mois.In addition, the actuating device according to the invention makes it possible to correct the month cam from the 1st to the 27th of the month without having to first disengage the large lever of the month cam.

Le dispositif d'actionnement selon l'invention peut être utilisé dans tout mécanisme de quantième perpétuel notamment également ceux pour lesquels le passage du 31 d'un mois au 1er du mois suivant est assuré par le petit cliquet, le grand cliquet n'assurant alors que la fonction de rattrapage des jours en fin de mois de moins de 31 jours (soit 1 à 3 jours à rattraper). Dans ce cas, la came de verrouillage qui coopère avec le sous-mécanisme de blocage peut être configurée par l'homme du métier pour que le sous-mécanisme de blocage soit en position déverrouillée au moins le dernier jour d'un mois de moins de 31 jours où un rattrapage des jours en fin de mois, par le grand cliquet, est nécessaire (et par exemple à partir du 28 d'un mois de moins de 31 jours), le sous-mécanisme de blocage pouvant rester en position verrouillée chaque jour des mois de 31 jours, y compris pour le passage du 31 au 1er du mois suivant par le petit cliquet.The actuating device according to the invention can be used in any perpetual calendar mechanism, in particular also those for which the passage from the 31st of a month to the 1st of the following month is ensured by the small pawl, the large pawl not ensuring while the catch-up function for days at the end of the month of less than 31 days (i.e. 1 to 3 days to catch up). In this case, the locking cam which cooperates with the locking sub-mechanism can be configured by those skilled in the art so that the locking sub-mechanism is in the unlocked position at least on the last day of a month less than 31 days when it is necessary to make up the days at the end of the month, by the large pawl (and for example from the 28th of a month with less than 31 days), the blocking sub-mechanism being able to remain in the locked position each day of 31-day months, including for the passage from the 31st to the 1st of the following month by the small ratchet.

Claims (9)

  1. Device (1) for actuating a date star (2) of a perpetual or semi-perpetual calendar mechanism comprising a large lever (4) arranged to be able to cooperate with a month cam (6) and to actuate the date star (2) each day, said large lever (4) being able to pivot with a stroke of variable amplitude depending on the month between a first initial actuation position defined by one of the positions of the large lever (4) when it is in contact with the month cam (6), and a final actuation position, characterised in that it comprises a mechanism for limiting the stroke of the large lever (4) so as to keep it between a second initial actuation position and the final actuation position, said second initial actuation position being intermediate between the first initial actuation position and the final actuation position, said limiting mechanism comprising a sub-mechanism (24) for blocking the large lever (4), the sub-mechanism being able to move between a locked position in which the large lever (4) is blocked in its pivoting in order that its travel be contained between its second initial actuation position and its final actuation position and an unlocked position in which the large lever (4) is free to pivot between its first initial actuation position and its final actuation position, and a locking cam (20) cooperating with said blocking sub-mechanism (24) and arranged to define the days for which the blocking sub-mechanism (24) is in a locked position or in an unlocked position, the blocking sub-mechanism (24) being in the unlocked position at least on the last day of months of less than 31 days, when a catching-up of the days at the end of the month is necessary.
  2. Actuating device as claimed in claim 1, characterised in that the blocking sub-mechanism (24) comprises a latch (26) arranged to block the large lever (4) in its pivoting in a locked position, and a lever (28) controlling the latch (26) and arranged to read on the locking cam (20) information relating to the days for which the blocking sub-mechanism (24) is in a locked position or in an unlocked position.
  3. Actuating device as claimed in claim 2, characterised in that said latch (26) comprises a protrusion (29) forming a stop on which a pin (30) fixedly attached to the large lever (4) bears when the blocking sub-mechanism (24) is in a locked position, defining the second initial actuation position of the large lever (4).
  4. Actuating device as claimed in any one of the preceding claims, characterised in that the large lever (4) comprises a small pawl (16) arranged to cooperate with the date star (2) and a large pawl (18) pivotably mounted on the large lever (4) and arranged to cooperate with a cam for catching up the days at the end of the month (20) fixedly attached to the date star (2) at least in order to catch up the days at the end of months of less than 31 days.
  5. Actuating device as claimed in the preceding claim, characterised in that the large pawl (18) is arranged to cooperate with the cam for catching up the days at the end of the month (20) for the transition from the 31st of a month to the 1st of the following month.
  6. Actuating device as claimed in the preceding claim, characterised in that the small pawl (16) is arranged to cooperate with the date star (2) in order to drive it by one step per day from the 1st to the last day of a month and in that the large pawl (18) cooperates with the cam for catching up the days at the end of the month upon transition from the last day of a month to the first day of the following month in order to move it until the date star (2) reaches a position corresponding to the 1st day of the following month.
  7. Actuating device as claimed in the preceding claim, characterised in that the locking cam (20) cooperating with the sub-mechanism (24) for blocking the large lever (4) is configured to keep said sub-mechanism (24) in its locked position from the 1st to the 27th day of a month and in an unlocked position until the last day of the month.
  8. Actuating device as claimed in any one of the preceding claims, characterised in that the locking cam is the cam for catching up the days at the end of the month (20).
  9. Timepiece comprising an actuating device as claimed in any one of claims 1 to 8.
EP19172296.6A 2019-05-02 2019-05-02 Device for actuating a calendar star of a semi-perpetual or perpetual calendar mechanism Active EP3734373B1 (en)

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EP19172296.6A EP3734373B1 (en) 2019-05-02 2019-05-02 Device for actuating a calendar star of a semi-perpetual or perpetual calendar mechanism

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Application Number Priority Date Filing Date Title
EP19172296.6A EP3734373B1 (en) 2019-05-02 2019-05-02 Device for actuating a calendar star of a semi-perpetual or perpetual calendar mechanism

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EP3734373A1 EP3734373A1 (en) 2020-11-04
EP3734373B1 true EP3734373B1 (en) 2023-05-10

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH719086A1 (en) * 2021-10-25 2023-05-15 Mft Dhorlogerie Audemars Piguet Sa Timepiece comprising a date mechanism and a date or month correction mechanism.
EP4325303A1 (en) 2022-08-16 2024-02-21 Manufacture d'Horlogerie Audemars Piguet SA Perpetual date mechanism with concentric cams

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE359484C (en) * 1922-09-22 Christo Diacoyanni Calendar clock
CH690739A5 (en) * 1998-11-27 2000-12-29 Patek Philippe Sa Mechanism for rapid correction of calendar watch movement with a calendar.

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