A chronograph mechanism (10) for a horological movement (1) having a chronograph train (20) including: a seconds counter (210), forming a first chronograph counter, having a seconds counter arbor (211) carrying a seconds counter display (214), a seconds counter wheel (212), and a drive finger (215) configured to drive an inter-counter wheel (23) in steps on each revolution of the seconds counter wheel; a second chronograph counter (220) having a second chronograph counter arbor (221) carrying a second chronograph counter display (224), and a second chronograph counter wheel (222) set in motion by said inter-counter wheel. A position-holding device (240) holds the second chronograph counter display in position, and is configured to ensure that the second chronograph counter display is held in position only when the second chronograph counter display is in an angular reference position and when the chronograph mechanism is stopped.

A chronograph module (1) including a plate, a primary shaft (3), and a primary disk (4) extending on an orthogonal plane to a longitudinal axis of the shaft. The primary shaft is fitted on the plate, such that the primary disk is engaged with a geartrain of the chronograph module. A removable wheel (2) is fitted on the primary shaft (3), and includes a peripheral gear structure and first (22) and second elastic arms (23) forming a clamp (30) to grip the primary shaft. A radial support surface (25) supports the elastic arms to assemble the removable wheel on the primary shaft. The arrangement and dimensions of the removable wheel produces an overlap of the removable wheel and an overlapping part of the module, such that the assembly of the overlapping part required the absence of the removable wheel whereas the primary shaft is fitted on the chronograph module.

A device for counting a number of time unit fractions or a number of movement unit fractions of a mobile member (1; 6; A2), the device a first including (i) a first cam (1) having a first surface (10: (ii) a second surface (20), the second surface being an abutment surface; (iii) a mobile support (4) urged by a spring (R4); (iv) a mobile pawl (3) mounted on the support (4) and urged by a spring (R3) toward the first surface, the pawl (3) being adapted to cooperate with one or the other of the first and second surfaces (10, 20) according to the position of the support (4); and (v) a control system (80) adapted, in a first or non-counting state of the control system, to maintain the support in a first position and, in a second or counting state of the control system, to allow the movement of the support.

The present disclosure relates to a chronograph-watch comprising a timepiece mechanism. The timepiece mechanism includes: a current time mobile comprising an axis and being arranged to rotate about this axis, a first mobile comprising an axis and being arranged to be connected to the current time mobile, an indicator member, a second mobile arranged to mesh with the first mobile and to be connected to the said indicator member, an element bearing a scale comprising a set of indications, the indicator member allowing information to be displayed on this scale. The mobiles are arranged so as to obtain a gear ratio between the mobiles which varies as a function of their relative angular position, so that the indicator member rotates with a variable rotational speed in correspondence with at least one subset of said set of indications.

A control device is disclosed, which comprises: a lever movable between a rest position and a triggering position, a spring arranged to return the lever in its rest position, an actuating member movable between a neutral position and an actuating position in which it actuates a watch mechanism, a mechanical energy storage member interposed between the lever and the actuating member in such a way that it is charged when the lever moves towards its triggering position, and can be discharged when the lever reaches its triggering position by moving the actuating member towards its actuating position, the device comprising a locking member intended to release the actuating member only when the lever reaches its triggering position.

The present disclosure concerns a watch mechanism having, in a main plane: an actuating device, a pivoting piece arranged to pivot under the action of the actuating device around an axis perpendicular to the main plane, a rigid piece, a first flexible blade connecting the rigid piece to the pivoting piece, a mechanical pivot having a main axis offset in the main plane from the axis of rotation of at least one of the pivoting piece and the rigid piece, the pivoting piece being mounted on said mechanical pivot, which preloads the first flexible blade and makes the assembly formed by the rigid piece and the first flexible blade bistable, so that the rotating pivoting piece causes the bistable assembly to move in the main plane, from a first stable position, to a second stable position.

A mechanical timepiece movement includes a chronograph mechanism arranged to be capable of carrying out at least one countdown of a predetermined time interval, including a display arranged to display at least the time remaining until the end of the countdown of the predetermined time interval, at least one member for controlling the start of the countdown, and a striking-mechanism. The striking-mechanism is arranged to start striking at a specified time before the end of the countdown and to stop striking at the end of the countdown of the predetermined time interval.

The invention relates to a chronograph mechanism (1; 201), for a timepiece movement, including a counter for a unit of time comprising:a display wheel capable of being rotated from a zero position,a return wheel, rotatable between an initial position, associated with the zero position of the display wheel, and a final position, the display wheel and the return wheel being arranged such that the return wheel pivots from its initial position to its final position when the display wheel makes one revolution,a resilient return member (20) arranged to act on the return wheel and to tend to return it to its initial position, the display wheel including a toothing arranged in mesh with the return wheel and having a truncated portion intended to allow the display wheel and the return wheel to be uncoupled on each complete revolution of the display wheel.

A chronograph module (1) including a plate, a primary shaft (3), and a primary disk (4) extending on an orthogonal plane to a longitudinal axis of the shaft. The primary shaft is fitted on the plate, such that the primary disk is engaged with a geartrain of the chronograph module. A removable wheel (2) is fitted on the primary shaft (3), and includes a peripheral gear structure and first (22) and second elastic arms (23) forming a clamp (30) to grip the primary shaft. A radial support surface (25) supports the elastic arms to assemble the removable wheel on the primary shaft. The arrangement and dimensions of the removable wheel produces an overlap of the removable wheel and an overlapping part of the module, such that the assembly of the overlapping part required the absence of the removable wheel whereas the primary shaft is fitted on the chronograph module.