A system (100) for displaying time or time derivative information, in particular a measured time, the system including a limb (10) comprising at least one modifiable graphic element (20a-f) forming time or time derivative reference information, a member (1) for indicating the time or time derivative information in cooperation with the limb, a device (2, 8, 22, 71) for modifying the graphic element, and a device (3, 4, 34) for resetting, by action of a user, to a predetermined configuration, in particular for resetting to zero, the time or time derivative information displayed by cooperation of the indication member and of the limb.

The invention concerns a display mechanism including a wheel carrying, constrained to rotate with it, a first wheel and a snail-shaped cam, the mechanism having an active first state in which the first wheel is driven in rotation by a driving wheel and a zero reset second state in which it is no longer driven to allow it to return to a predefined position, associated with a predefined position of the display member, the display mechanism further including a feeler-spindle adapted to cooperate with the perimeter of the cam, the feeler-spindle and the perimeter of the cam being adapted and sized so that the feeler-spindle exerts on the cam, in the second state, a return force having a non-radial component adapted to return the first wheel to its predefined position.

A coupling system for a chronograph mechanism, said system comprising: an input wheel intended to be driven by a drive member; an output wheel intended to drive at least one display member; an intermediate wheel continuously kinematically connected to a first wheel chosen from said input wheel and said output wheel, said intermediate wheel being mounted so that it can change between a coupled state in which said input wheel is kinematically connected to said output wheel and an uncoupled state in which said kinematic connection is broken. According to the invention said system further includes: a first friction wheel constrained to rotate with said intermediate wheel and a second friction wheel constrained to rotate with a second wheel chosen from said input wheel and said output wheel, said friction wheels being at least partially coplanar and being adapted to transmit rotation between said intermediate wheel and said second wheel, or vice versa, when said system is in the coupled state; a first safety wheel constrained to rotate with said intermediate wheel and comprising a first set of safety teeth and a second safety wheel constrained to rotate with said second wheel and comprising a second set of safety teeth, said sets of safety teeth being conformed in order mutually to interpenetrate when said intermediate wheel (9) is in the coupled state.

A zeroing device (200), including a first zeroing unit (71), which consists of a zeroing lever (12) having a zeroing lever arm (12a) and a zeroing lever latch (12b), wherein the zeroing lever latch (12b) has a first end (13) and a second end (14).

The zeroing device is characterized by a second zeroing unit (72) that is arranged at an offset to the first zeroing unit (71) in a Z coordinate direction (Z) and is in operative connection with the first zeroing unit (71). The second zeroing unit (72) may also include a pendulum rod (31), a hinge support (34), and a joint rod (35), wherein the pendulum rod (31) is rotatably attached to a cam (33) and to the joint rod (35) and wherein the joint rod (35) is rotatably attached to the hinge support (34) and rests against an eccentric (36) of the zeroing lever (12).

Disclosed is an assembly to equip a timepiece mechanism and including at least one elastic element and at least first and second timepiece components, the elastic element cooperating with the first and second timepiece components and the elastic element, in the rest position, urging the first and second components to displace one of the timepiece components relative to the other. The elastic element includes a first end cooperating with the first component, the first component and the first end of the elastic element being shaped so, in the service position, the torque exerted by the elastic element on the first component and the second component maintains the first end of the elastic element in abutment on the first component at at least three distinct first bearing points that eliminate at least two degrees of freedom of movement between the first end of the elastic element and the first component.

A timepiece mechanism for returning the seconds hand to zero, which includes a seconds arbor; a seconds hand; a cam forming a snail cam path which extends in a spiral around the seconds arbor from an inner end to an outer end connected to each other by a radial stop surface; a hammer carrying a cam follower, rotatably mounted about a hammer axis between a disengaged position wherein the cam follower is removed from the cam path and an engaged position wherein the cam follower presses on the cam path; a retaining ratchet system including a toothed wheel and a click which engages with the toothed wheel.

The invention concerns a watch comprising a case having a middle part and inside which is housed a movement. The watch also includes a control member intended to be actuated by a user and an internal transmission device provided with an actuator, able to move, in response to actuation of the control member, between a rest position and an active position in which it actuates a mechanism of the movement. In an original manner, the transmission device includes a closed cavity filled with a fluid and a thrust means kinematically connected to the control member and arranged to displace the fluid inside the cavity, the displacement of fluid inside the cavity causing displacement of the actuator.

A zeroing device 100 for a chronograph, comprising at least one zeroing heart 110, 120, a zeroing unit 200, which has a zeroing lever arm 210 and a zeroing lever bar 220, the first end 221 of which is designed to contact the zeroing heart 110, 120, and a control means 130 which interacts with the zeroing lever arm 210, wherein a zeroing of the zeroing unit 200 is effectuated by actuating the control means 130. This enables low production and maintenance costs and allows the counter hands to be reset to the zero position in a safer, more durable, and user-friendly manner. The zeroing device 100 comprises a first compression spring 140 which is supported on the zeroing lever arm 210 and is operatively connected to the control means 130, and the control means 130 interacts indirectly, via the first compression spring 140, with the zeroing unit 200.

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 device (100) to temporarily stop the operation of a mechanical watch, in particular when time resetting the watch. The device includes at least three levers (4) assembled and disposed in a circle on a plate of the mechanical horological movement. At least one action member (2) of the levers (4) is provided to switch them together from a rest mode to an active mode to act on a stop lever (17) of the device. The stop lever is arranged to temporarily stop a balance spring (14) of the mechanical movement. The activation of the stop lever (17) is performed by at least one of the levers (4) regardless of the position of the stop lever (17).