Abstract: A timepiece movement includes: an hour wheel and pinion; a minute wheel and pinion; a winding stem; a time difference correction train; a date indicator; and a date change mechanism. The hour wheel and pinion includes an hour wheel that rotates with the minute wheel and pinion, an hour jumper, an hour jumper pinion, and an hour wheel body that turns with the hour wheel via the hour jumper and hour jumper pinion, and turns with the time difference correction train. The date change mechanism includes a date change wheel that turns with the hour wheel body, a date change lever, a date change cam that flexes the date change lever by rotating with the date change wheel, and turns in response to the flexed date change lever spring force, and a date change pawl that rotates with the date change cam, and advances the date indicator.

Abstract: A timepiece calendar system (100) including: —a date mobile (1); —a first device (3) for indexing the position of the date mobile; —a second device (4) for indexing the position of the date mobile; —an element (70, 3b, 4b, 40) for activating and deactivating at least one of the first and second indexing devices, the indexing of the date mobile by one or the other of the first and second indexing devices being mutually exclusive.

Abstract: The timepiece movement is provided with an analog display device for an item of information whose value varies periodically or intermittently, this analog display device including an indicator for said information provided with a toothing and a mechanism for the periodic or intermittent driving of the indicator, this mechanism comprising a rotating wheel set whose pinion, in a meshing relationship with the toothing, is formed of two pins which are diametrically opposite relative to the rotational axis of the rotating wheel set, these two pins being configured to alternately penetrate successive hollows in the toothing and to form a self-locking system when the timepiece movement is subjected to shocks. Each of the two pins has, in a general plane of the toothing perpendicular to the axis of rotation of the rotating wheel set, a transverse profile having a first outer portion substantially in the arc of a circle centered on the axis of rotation.

Abstract: A change of state indicator (2) device for a timepiece display mechanism (30) by jumps of a given magnitude for the display of a transition between two stable display states of this given magnitude movable close to the display zone of this magnitude facing a supplementary display (3) driven discontinuously by a drive element (7) against elastic return means (19). A driving pinion (9) controls a star wheel (10) in a discontinuous manner to control each jump against a beak (14) of a first arm (15) of a lever (13) controlling a pivoting movement and a return to position of this indicator (2) each time this beak (14) passes between two successive tooth spaces (12) of this star wheel (10) by means of a tooth (11) between these spaces (12). The lever (13) includes a second support arm (16) for supporting the indicator (2) or controlling its displacement.

Abstract: The timepiece movement has an instantaneous actuator controlled by the movement and arranged to actuate a mechanism of the movement by pushing away one element (126) of the mechanism against a return force. The actuator includes a trailing wheel (205) driven by the movement, an eccentric (207) free to rotate coaxially to the trailing wheel and arranged to abut against and therefore be driven by the trailing wheel, a small wheel (219) returned by a spring against the periphery of the eccentric, a pivoting wheel set having a projecting portion (213) free to rotate coaxially to the trailing wheel and arranged to abut against and therefore be driven by the eccentric, the projecting portion (213) of the pivoting wheel set being arranged to push the element (126) of the mechanism away in passing against a return force.

Abstract: Timepiece displaying the current time and including at least first and second display devices for a time-related quantity, the first and second display devices each being driven by a drive mechanism including a drive wheel (2; 2a), which is itself driven by the movement of the timepiece (3), at least the drive wheel (2; 2a) of one of the drive mechanisms carrying a finger (4; 4a) via which the wheel drives the corresponding display device, the timepiece (3) being characterized in that the finger (4; 4a) is friction fitted onto the drive wheel (2; 2a).

Abstract: Spring (30) for clock mechanism, the spring comprising a body (31) extending between a first end (32) of the spring and a second end (33) of the spring, the spring being intended to be mechanically connected to a housing at each of the first and second ends, the spring comprising, between the first and the second end, at least one member (37) intended to act by contact on an element of the clock mechanism.

Abstract: A backlash-compensating mobile (1) intended to form a gear with a second mobile (2) and having rigid teeth (4, 5) and backlash-compensating leaf springs (16), is characterized in that the rigid teeth (4, 5) are distributed in groups of consecutive teeth, each group having a first rigid tooth (4) and a second rigid tooth (5) having respective mutually facing meshing flanks (10, 11) to permit the displacement of the second mobile (2) in both directions, and in that the leaf springs (16) are interleaved between these groups in spaces not intended to receive the teeth (3) of the second mobile (2), and extend beyond the tip circle (Ca) of the rigid teeth (4, 5) in order to cooperate with the second mobile (2).

Abstract: A support for a mechanism for displaying jumping-type information for a timepiece movement is disclosed. The mechanism may include a display member driven in rotation via a driving star wheel. The support may be positioned between the display member and a frame element of the timepiece movement. The support may include a base that may include at least one first hole configured to receive a shaft for rotating the display member. The support may also include a first arm extending from the base and arranged to ensure the function of a jumper for the driving star wheel, and a second arm extending from the base and arranged to act on the driving star wheel to cause the driving star wheel to rotate in order to correct information displayed in response to a predefined action of a user that deforms the second arm.

Abstract: An electronic timepiece with a solar cell is provided with a solar cell, a solar cell holding member, a light-transmissive character plate, a ground plate, and a ring-shaped calendar wheel. The solar cell includes a base material that is made of an insulating material, and a light-receiving unit that is arranged on a first surface of the base material. The solar cell holding member is fixedly attached to a second surface of the base material. The light-transmissive character plate is arranged on a timepiece front side of the solar cell. The ground plate is arranged on a back surface of the solar cell. The ring-shaped calendar wheel is disposed between the character plate and the ground plate. The solar cell holding member is arranged on a character plate side of the calendar wheel to position the calendar wheel.

Abstract: The invention relates to a timepiece (1) including a timepiece movement (5) comprising a time measuring system (11) for displaying the time, and a date system (13) connected to said time measuring system for displaying the date. According to the invention, the date system (13) includes a display of the continuously moving type and a correction device (12) which can correct said date display at any time, by a predetermined step (A, B), while maintaining the relationship of said continuous movement relative to that of said time during the correction operation. The invention concerns the field of date displays.

Abstract: A backlash-compensating mechanism includes a cam, an actuating member bearing against the cam and a wheel coaxial to the cam and intended to be driven by a gear train of the movement. The cam and the wheel are connected to each other such that one revolution of the wheel includes a sequence of a first phase in which the wheel drives the cam whilst the co-operation between the cam and the actuating member cocks the latter, a second phase in which the actuating member uncocks and causes the cam to effect an instantaneous jump, and a third phase in which the cam is immobilized and the wheel continues to advance until it catches up with the cam to once again drive it during the first phase of the following revolution. This mechanism includes a resilient element acting between the cam and the wheel and applying a return torque to the wheel during the third phase to compensate the backlash in the gear train.

Abstract: The annual calendar device carries a date ring (1) and a drive wheel (5) for said ring. The drive wheel (5) carries a mechanism (10) including a first finger (6) driving the ring (1) through one step each day and a second finger (7) which is inserted, at the end of the months of less than thirty-one days, into the trajectory of the teeth (4) of the ring (1) to move said ring forward one additional step. The second finger (7) is inserted into said trajectory by a kinematic chain (9) controlled by a toothing (8) carried by the ring (1).

Abstract: Date mechanism (100) for a timepiece (1000) including a movement (200) which daily pivots a lever (2), comprising a perpetual twelve cam (9) with sectors whose depth depends on the duration of the successive months, completing one revolution per year. The mechanism has a single click and includes: a single click finger (1), hinged to said lever (2) and arranged to cooperate with a thirty-one ratchet wheel (31) which pivots integrally with a first thirty-one snail cam (4) arranged to control a date display means (412), and a second cam (29) including a radial finger (29A); a countdown mechanism (300) whose position is determined by said second cam (29), adjusting the number of teeth of said wheel (31) to be activated by said click finger (1) according to the current day and current month; a means of driving said cam (9).

Abstract: A watch with a calendar mechanism has a rotatable first date indicator for displaying a ones place of a date, a rotatable second date indicator for displaying a tens place of the date, and a second date indicator feeding lever for rotating the second date indicator. The first date indicator has calendar shift teeth and first date indicator tooth portions. The calendar shift teeth include a first calendar shift tooth, a second calendar shift tooth arranged relative to the first calendar shift tooth at a first interval, a third calendar shift tooth arranged relative to the second calendar shift tooth at a second interval greater than the first interval, and a fourth calendar shift tooth arranged relative to the first calendar shift tooth at a third interval greater than each of the first and second intervals.

Abstract: A timepiece includes a timepiece movement. The timepiece movement includes a time measuring system for displaying the time and a date system connected to the time measuring system for displaying the date. The date system includes a display of the continuously moving type and a correction device which can correct the date display at any time, by a predetermined step, while maintaining the relationship of the continuous movement relative to that of the time during the correction operation.

Abstract: The annual calendar device carries a date ring (1) and a drive wheel (5) for said ring. The drive wheel (5) carries a mechanism (10) including a first finger (6) driving the ring (1) through one step each day and a second finger (7) which is inserted, at the end of the months of less than thirty-one days, into the trajectory of the teeth (4) of the ring (1) to move said ring forward one additional step. The second finger (7) is inserted into said trajectory by a kinematic chain (9) controlled by a toothing (8) carried by the ring (1).

Abstract: The present invention aims to provide a watch with a calendar mechanism which allows a reduction in the thickness of a date feeding mechanism and a month feeding mechanism. In a watch with a calendar mechanism according to the present invention, a date indicator includes a month end tooth for driving a month feeding lever at the end of a month and feeding the date indicator at the end of a shorter month. A month indicator includes a month cam for operating a shorter month end feeding lever at the end of a shorter month. The shorter month end feeding lever can feed the date indicator by one day based on the rotation of a date indicator driving wheel and the rotation of the month cam. The month feeding lever moves toward the month indicator at the end of a month based on the rotation of the date indicator, and can feed the month indicator by one month.

Abstract: A backlash-compensating mechanism includes a cam, an actuating member bearing against the cam and a wheel coaxial to the cam and intended to be driven by a gear train of the movement. The cam and the wheel are connected to each other such that one revolution of the wheel includes a sequence of a first phase in which the wheel drives the cam whilst the co-operation between the cam and the actuating member cocks the latter, a second phase in which the actuating member uncocks and causes the cam to effect an instantaneous jump, and a third phase in which the cam is immobilized and the wheel continues to advance until it catches up with the cam to once again drive it during the first phase of the following revolution. This mechanism includes a resilient element acting between the cam and the wheel and applying a return torque to the wheel during the third phase to compensate the backlash in the gear train.

Abstract: A calendar mechanism includes: a calendar driving wheel equipped with a calendar finger portion rotating a calendar cogwheel portion and a cam portion equipped with a torque reduction shape portion; a lever main body portion rotatably supported on a substrate, a jumper support lever equipped with a cam follower portion following the cam portion, and a jumper operating spring shoe portion provided in an intermediate portion in the longitudinal direction of the lever main body portion and formed on the same side as the cam follower portion with respect to the rotating direction thereof; and a jumper arranged so as to be rotatable with respect to the jumper support lever while overlapping the lever main body portion of the jumper support lever, the jumper being equipped with a jump control finger portion which is directed in a direction opposite to the cam follower portion of the jumper support lever and whose distal end side end portion is pressed against the calendar cogwheel portion by a jumper spring portion

Abstract: Device that assists in maintaining the position of a date indicator disc (2; 3) for a timepiece, the position of the date indicator disc (2; 3) being indexed by a jumper spring (50; 50?), said device being characterized in that it includes a locking member (52; 52?) which, outside the date indication correction phases, keeps the jumper spring (50; 50?) locked, said locking member (52; 52?) moving away in the date indication correction phase to release the jumper spring (50; 50?).

Abstract: To provide a timepiece with a calendar mechanism whose movement is of a simple construction and whose date display is large and easy to see. A timepiece with a calendar mechanism according to the present invention is equipped with a first date indicator indicating the one place, a first date jumper, a second date indicator capable of indicating the ten place and singly displaying a one-digit date, and a second date jumper. A first date letter display surface is provided with numbers for indicating the one place of a date. A second date letter display surface is provided with numbers for singly indicating a one-digit date and numbers for solely indicating the ten place. A window portion is formed in the second date indicator. The second date letter display surface is arranged at a position closer to a dial than the first date letter display surface.

Abstract: The present invention aims to provide a day display apparatus having less risk of occurrence of a day hopping even when an impact caused by a drop or the like is applied and a watch having the same.

Abstract: To provide a calendar mechanism wherein the building-in property of a second date indicator is improved, and an analog timepiece equipped therewith. A calendar mechanism of an analog timepiece includes a first date indicator which includes a first date character indication portion, a first date indicator gear portion, and an endless ring-shaped drive cam portion; a drive cam lever which includes an operating lever portion including a first fan-shaped gear portion, wherein a driven lever portion is spring loaded in order to become a cam follower, and the operating lever portion is pivoted in accordance with the driven lever portion abutting against the drive cam portion; a second date indicator which, being rotatable, includes a second date character indication portion and a second fan-shaped gear portion meshing with the first fan-shaped gear portion; and a positioning/locking portion.

Abstract: Time zone timepiece including an hour hand (6) capable of being moved forward or backward in one hour steps by means of a manually actuated time setting stem (28) without affecting the minute display, said hand (6) being fitted onto an hour pipe (4) about which an hour hand (2) is adjusted to pivot freely, driven by a motion work (10), an additional wheel (12) secured to the pipe (4) driving an additional device, the hour wheel (2) being coupled to the additional wheel (12) by a limited torque mechanism (16), the timepiece being characterised in that, outside the periods in which the time zone time is being corrected, the hour wheel (2) and the additional wheel (12) are further rigidly coupled by a second coupling mechanism.

Abstract: Device that assists in maintaining the position of a date indicator disc (2; 3) for a timepiece, the position of the date indicator disc (2; 3) being indexed by a jumper spring (50; 50?), said device being characterized in that it includes a locking member (52; 52?) which, outside the date indication correction phases, keeps the jumper spring (50; 50?) locked, said locking member (52; 52?) moving away in the date indication correction phase to release the jumper spring (50; 50?).

Abstract: The perpetual calendar mechanism includes a date mobile (16, 28-31), a date lever (3) bearing a small click (14), a correction lever (4) driving a great click (40) and a finger (2) driving the levers (3, 4). The date mobile (16, 28-31) is shifted instantaneously by the small click (14) during the transition from one day to the next within a month and during the transition from the last day of a month of 31 days to the first day of the following month, and partly in a dragging manner by the great click (40) during the transition from the last day of a month of less than 31 days to the first day of the following month.

Abstract: The mechanism includes a display member (10) fitted with a toothing (14) mounted so as to move in rotation, a drive wheel set (39) mounted so as to move in rotation, including a cam (40) and a finger (24), wherein the finger is secured in rotation to the cam to make a finger-cam assembly and the finger cooperate with the toothing to drive the display member by steps, and a spring (38) cooperating at least indirectly with the cam, wherein the cam is arranged for pivoting, the finger-cam assembly, via the slackening action of the spring, so as to drive the display member through one step. The cam is further arranged for pivoting the finger assembly, via the slackening action of the spring, so as to release the finger from the toothing after the finger cam assembly has driven the display member through one step.

Abstract: The present invention aims to provide a day display apparatus having less risk of occurrence of a day hopping even when an impact caused by a drop or the like is applied and a watch having the same.

Abstract: The invention concerns an instantaneous display mechanism for a timepiece, including: a display member (10) fitted with a toothing (14) mounted so as to move in rotation, positioned using a jumper spring (16), a drive wheel set (39) mounted so as to move in rotation, including a cam (40) and a finger (24) secured in rotation to the cam (40), said finger (24) cooperating with said toothing (14) to drive the display member (10) by steps, a spring (38) cooperating at least indirectly with said cam (40), said cam (40) being arranged for pivoting, via the slackening action of said spring (38), the finger (24)—cam (40) assembly so as to drive said display member (10) through one step. The cam (40) is further arranged for pivoting the finger (24)—cam (40) assembly, via the slackening action of said spring (38), so as to release said finger (24) from said toothing (14) after the finger (24)—cam (40) assembly has driven said display member (10) through one step.

Abstract: The movement (10) includes at least one display ring (12, 14) which is rotatably mounted on a bottom plate (16) and which carries markings that will appear in a display zone (22). The ring (12, 14) is fitted with an inner peripheral toothing (24, 26) which cooperates with drive means (20) and which cooperates with a jumper spring (32, 34). The jumper spring (32, 34) is drawn towards the radial abutment position by an elastic return element (40, 42). A holding plate (48) is secured on the bottom plate (16) so as to retain the jumper spring (32, 34) axially. The holding plate (48) is secured on the bottom plate (16) by a bayonet type assembly. The holding plate (48) includes at least one winding member (58) which cooperates with the stop device (32, 34) during the pivoting of the holding plate (48) from the non fixed angular position thereof to the fixed angular position thereof, so as to arm the associated elastic return element (40, 42).

Abstract: The movement (10) includes at least one display ring (12, 14) which is rotatably mounted on a bottom plate (16) and which carries markings that will appear in a display zone (22). The ring (12, 14) is fitted with an inner peripheral toothing (24, 26) which cooperates with drive means (20) and which cooperates with a jumper spring (32, 34). The jumper spring (32, 34) is drawn towards the radial abutment position by an elastic return element (40, 42). A holding plate (48) is secured on the bottom plate (16) so as to retain the jumper spring (32, 34) axially. The holding plate (48) is secured on the bottom plate (16) by a bayonet type assembly. The holding plate (48) includes at least one winding member (58) which cooperates with the stop device (32, 34) during the pivoting of the holding plate (48) from the non fixed angular position thereof to the fixed angular position thereof, so as to arm the associated elastic return element (40, 42).

Abstract: To provide a structure capable of performing a correction which surely and easily turns a date display back by rotating a 1st date indicator and a 2nd date indicator in both positive and reverse directions. A timepiece with a calendar mechanism possesses a 1st date indicator, a 2nd date indicator, and a date intermediate wheel which rotates the 2nd date indicator by a rotation of the 1st date indicator. Calendar shift teeth of the 1st date indicator possess a positive rotation unlocking part and a reverse rotation unlocking part.

Abstract: This mechanism comprises a date runner, a months satellite with five teeth on a pitch for twelve, secured to the date runner, a fixed planetary toothset and a drive member for driving the date runner comprising two drive fingers, the first intersecting the path of the toothset of the date runner, the second intersecting the path of the toothset of the months satellite. The latter is connected to the planetary toothset by a second satellite secured to it and the number of teeth of which is equal to a multiple of twelve, the number of teeth of the planetary toothset being chosen so that one of the five teeth of the months satellite is aligned with the axes of the satellites, of the drive member and of the date runner on the 30th of each month comprising less than 31 days.

Abstract: A timepiece equipped with a calendar mechanism has a first date indicator for displaying the units numeral of the date, a first date jumper for setting a position of the first date indicator in a rotation direction, a second date indicator for displaying the tens numeral of the date, a second date jumper for setting a position of the second date indicator in a rotation direction, and a date intermediate wheel for undergoing rotation in accordance with rotation of the first date indicator to thereby rotate the second date indicator. The first date indicator has a first date character display surface including 31 numerals “1”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, “9”, “0”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, “9”, “0”, “1”, “2”, “3”, “4”, “5”, “6”, “7”, “8”, “9”, and “0”. The second date indicator has a first date character display surface including four numerals “1”, “2”, “3”, and “0”, or a second date character display surface including three numerals “1”, “2”, and “3”.

Abstract: This date mechanism comprises a calendar mobile (1), a driving mobile (3) an instantaneous-jump cam (7), a finger (9b) kinematically connected to this cam (7) in order to drive the calendar mobile (1). The driving finger (9b) is borne by a release member (9) which is mounted pivotably about two axes (3a, 7a), one (3a) of which is that of the driving mobile (3), this release member (9) having an opening (9a) configured to allow an angular displacement about the second of these two axes (7a), whereby the driving finger (9b) can be released from the toothing (1a) of the calendar ring while the calendar is corrected. A return spring (8) tends to rotate the driving finger (9b) about the second pivot axis (7a) in order to bring it to butt against an edge of the opening (9b), a position in which the driving finger is engaged with the toothing of the calendar ring (1).

Abstract: A calendar timepiece has a main plate, a time indicator mounted on the main plate for undergoing rotational movement to indicate time information, a date indicator mounted for undergoing rotation to indicate date information, and a date indicator driving wheel mounted on the main plate for undergoing rotation. A date jumper is disposed on the main plate and has a train wheel comprised of a date indicator setting portion for controlling rotation of the date indicator by engagement with the inner teeth portion of the date indicator. The date indicator setting portion has a first setting portion for contacting a tip of a first tooth of the date indicator, a second setting portion, and a third setting portion for contacting a tip of a second tooth of the date indicator. Each of the first, second, and third setting portions has a generally linear surface portion disposed at an angle relative to one another.

Abstract: A timepiece comprising a date display, comprising a date display assembly comprising a date ring, a first gearing assembly being meshingly coupled to the date ring for causing the rotation of the date ring; and a stepping motor comprising a rotor, wherein the rotor of the stepping motor is rotateably coupled to the at least one or more wheels of the first gearing assembly, wherein the rotation of the rotor causes the date ring to rotate; a date-keeping assembly operatively coupled to the date display assembly, comprising: at least a second gearing assembly comprising at least an hour wheel and a detection wheel assembly, wherein at least certain rotational increments of the detection wheel, and the clockwise or counterclockwise direction thereof, causes the rotor of the stepping motor to rotate so that the date ring can be rotated in one of a clockwise or counterclockwise direction; whereby the rotation of the hour wheel through a predetermined midnight position results in that the stepping motor causes the d

Abstract: To provide a jumper structure which is light-weighted and capable of reducing fabrication cost and a timepiece using the same. A jumper structure of a timepiece is constituted by integrally molding a jumping and restricting portion made of carbon nanofiber and a spring portion made of carbon nanofiber. A jumping and restricting portion of the jumper structure is thicker than the spring portion and the jumping and restricting portion includes a projected portion in a flat plate shape and in an eaves-like shape.

Abstract: An electronic timepiece has a wheel train mounted for undergoing rotation and a transmission wheel for undergoing rotation in accordance with rotation of the wheel train. A contact point spring is connected to the transmission wheel for rotation therewith. The contact point spring extends substantially linearly through a rotational center of the transmission wheel. First and second detection patterns contact the contact point spring during rotation of the transmission wheel to generate a rotational position detecting signal corresponding to a rotational position of the transmission wheel. The first and second detection patterns are disposed at an angle of substantially 180 degree relative to the rotational center of the transmission wheel.

Abstract: To provide an electronic timepiece enabling reliable detection of a state of rotation of an indication wheel such as a date dial. An ultrasonic motor 1130 has an ultrasonic rotor pinion 1134b. A date dial 1120 is disposed on a main plate 1102 in such a way as to rotate relative thereto. The ultrasonic rotor pinion 1134b is meshed with an intermediate date driving gear wheel 1142a. A date driving wheel 1150 is rotatably disposed on the main plate 1102. A date driving gear wheel 1150b is meshed with an intermediate date driving pinion 1142b. A date driving gear portion 1150b is meshed with a dial gear portion 1120a. A contact point spring 1160 is disposed on a spring guiding portion 1150d. The contact point spring 1160 rotates integrally with the date driving wheel 1150 through the rotation of the date driving wheel 1150. The state of rotation of the date driving wheel 1150 can be detected by contact of the contact point spring 1160 with the contact point pattern 1174.

Abstract: An intermittent feed mechanism has a counting wheel and a cam balancer mounted on the counting wheel and having a hole. A feed pawl is mounted on the cam balancer and has a spring portion and a pawl portion. The pawl portion of the feed pawl has a protrusion disposed in the hole of the cam balancer and pressed against an edge portion of the hole by a biasing force of the spring portion.

Abstract: To provide a jumper structure which is light-weighted and capable of reducing fabrication cost and a timepiece using the same. A jumper structure of a timepiece is constituted by integrally molding a jumping and restricting portion made of carbon nanofiber and a spring portion made of carbon nanofiber. A jumping and restricting portion of the jumper structure is thicker than the spring portion and the jumping and restricting portion includes a projected portion in a flat plate shape and in an eaves-like shape.

Abstract: A time-setting mechanism for a clock movement with perpetual Julian date comprising a device for driving a date indicator including driving means for moving forward said indicator by one jump every twenty-four hours. The movement has an adjusting device for automatically moving said indicator by a number of steps taking into account months with 28, 29 or 30 days, said device comprising a rotary cam driven by at least one step every twenty-four hours, said cam having a profile for steering a sensor bringing about: the oscillating movement of a moving mechanism provided with a pawl system for moving forward the date indicator by the required additional number of adjusting steps; and for moving forward said cam by a number of steps equal to the number of said indicator adjusting steps so as to make it move one complete cycle per year.

Abstract: A train of clockwork with perpetual Julian date, characterized in that it comprises an adjusting device for causing a date indicator (2) to carry out adjusting steps, for automatically taking into account months with 28, 29, or 30 days, said adjusting device comprising a rotating cam (26) driven at least one step every twenty-four hours, said cam (26) having an outline (28) for controlling a sensor (30) bringing about: the oscillating motion of a mobile element (32) provided with a click spring system (34), for moving forward the date indicator (2) by the required supplementary step(s), and the forward movement of said cam (26) for causing it to make the number of steps equal to the number of adjusting steps of said indicator (2) for carrying out one complete round every year.

Abstract: A timepiece includes a date indicator with inner teeth moving angularly by one step per day. An indication control star meshes with the inner teeth of the indicator. A pinion that is integral and coaxial with the star drives an indicator wheel on which an indication arbor is centrally disposed. The rotary indicating structure is driven by the date indicator through the indication arbor and is intended to indicate cyclic parameters such as the date, the phase of the moon, the user's "cash balance," etc. Various types of indication, all controlled by the date indicator, make it possible to produce a wide range of watches of simple design with different display combinations.

Abstract: The invention concerns a timepiece. Such timepiece comprises: a horometric movement (1) including a motor pinion or intermediate wheel (2), a crown wheel with interior teeth (6) associated with a first display system, such as a date display, and a jumper spring (8), a driving wheel set (10) including a drive wheel (12) controlled by the motor pinion (2) and transmitting a motor couple received from the motor pinion to the crown (6) through a salient tooth (14), such wheel set (10) additionally including a hub (16) which is mounted to rotate freely relative to the movement and which elastically supports the drive wheel (12) through an elastic arm (22), such timepiece being characterized in that the elastic arm (22) which supports the drive wheel (12) has a basically C form winding around the hub (16), while the drive wheel (12) meshes directly with the motor pinion (2). The invention is applicable to a timepiece of the mechanical or electromechanical type.

Abstract: A device for controlling or correcting the readout of the day of the week or date for an analog watch, comprising a crown cogged on the inside and integral with a date or day disk, a bi-directional drive motor and a drive wheel coupled to the drive motor, the drive wheel having two opposite spring-loaded clicks and an arcuate slot in which a fixed stud is engaged, the stud cooperating with the edges of the slot to limit the travel of the drive wheel. The drive mechanism of the date or day disk can thus be recentered automatically after the watch has stopped while simultaneously compensating the rated steps of the motor.

Abstract: An electronic watch comprising a device for controlling and driving the day of the month disc, wherein the wheel train supplies the energy necessary for moving the day of the month disc, but does not determine the instant of the jump, which may be initiated at any moment by an electrical signal, independently of the position of the wheel train.The device comprises a mechanism driven by the wheel train and arranged so as to disengage when the moving bodies of the wheel train, controlling the display, turn continuously in clockwise direction and to re-engage when said moving bodies turn in anti-clockwise direction. A control circuit determines, in a portion of the driving cycle in an anti-clockwise direction of rotation with a rapid rate, the jump of the display disc of the day of the month mechanism.

Abstract: A lever actuated by a manual pushbutton for advancing the date ring of a calendar watch so as to correct for months having less than 31 days. A special date change lever incorporates a tab actuated by the pushbutton, a first integral spring portion for biasing the lever to a normal rest position, a second integral spring portion for biasing an arm with a tab against the teeth of the date ring for advancing the date ring.