Timepiece wheel set with a unidirectional wheel rotating in only one direction in cooperation with a ratchet wheel, which is movable inside a ratchet wheel chamber, comprising a click that rotates integrally with this wheel, which forms a one-piece component comprising at least one spring-arm, at the end of which, on a first side, a beak cooperates directly with the toothing of a ratchet wheel in an operating position in which this spring-arm is free, and on a second side, a first hook can cooperate with a second hook of complementary shape, comprised in this one-piece click, in a rest position in which this spring-arm is in an extended position, the elasticity thereof allowing this first hook to be hooked or unhooked with respect to this second hook by the action of an operator, by maximum elongation of this spring-arm and/or by the tilting of this end.

A spring (1) for a notching system, the spring including at least two elastic arms (11, 12), and a first toothset javomg first notching teeth (11a, 12a) disposed on each of the arms, the spring being designed such that, in a position in which one of the arms of the spring is not loaded, the arm is convex as seen from the top of the first notching tooth of this arm.

A notching system (100) including a spring (1) having a first including n first teeth (11a, 12a) a first member (2) having a second toothset including m second teeth (22a, 22b), and a second member (3) mounted so as to be movable, in particular mounted so as to be rotatable, with respect to the first member (2), the first and second toothsets being arranged such that, through their interactions, they define p notches or indexed positions, the spring (1) including at least two elastic arms (11, 12), and at least one first pivot connection element (1b) between said two elastic arms (11, 12), the second member including at least one second pivot connection element (3b) cooperating with the at least one first pivot connection element (1b) in order to create at least one pivot connection between the spring (1) and the second member (3).

A vertical clutch device for a timepiece includes along a vertical axis a first wheel rotatably mounted about the vertical axis, a clutch disc, a spring, and a second wheel rotatably mounted about the vertical axis. The vertical clutch device is able to assume a clutched position where the second wheel is rotated by the first wheel under the action of the spring exerting a vertical force Fe to press the clutch disc against the first wheel and a disengaged position where the clutch disc is subjected against the action of the spring to a vertical force Fd separating it from the first wheel so that the second wheel is not rotated by the first wheel. The spring of the vertical clutch device is made of a shape memory alloy.

A vertical clutch device for a timepiece includes along a vertical axis a first wheel rotatably mounted about the vertical axis, a clutch disc, a spring, and a second wheel rotatably mounted about the vertical axis. The vertical clutch device is able to assume a clutched position where the second wheel is rotated by the first wheel under the action of the spring exerting a vertical force Fe to press the clutch disc against the first wheel and a disengaged position where the clutch disc is subjected against the action of the spring to a vertical force Fd separating it from the first wheel so that the second wheel is not rotated by the first wheel. The spring of the vertical clutch device is made of a shape memory alloy.

A device for automatic winding of a barrel spring of a watch includes an oscillating mass, an entry disk kinematically linked to the oscillating mass, two reduction disks and a ratchet driving disk, each reduction disk including a reduction wheel bearing at least four planetary wheels, and a transmission pinion about which the reduction wheel is loosely mounted, the entry disk being kinematically linked to the two reduction wheels such that, regardless of the direction of rotation in which it is driven by the oscillating mass, it rotates the two reduction wheels in mutually different directions, the planetary wheels forming, in each of the reduction disks, ratchets to connect in rotation the transmission pinion and the reduction wheel only when the reduction wheel pivots in a predefined direction of rotation, the predefined direction of rotation being identical for either of the reduction wheels

A spring (1) for a notching system, the spring including at least two elastic arms (11, 12), and a first toothset javomg first notching teeth (11a, 12a) disposed on each of the arms, the spring being designed such that, in a position in which one of the arms of the spring is not loaded, the arm is convex as seen from the top of the first notching tooth of this arm.

Timepiece wheel set with a unidirectional wheel rotating in only one direction in cooperation with a ratchet wheel, which is movable inside a ratchet wheel chamber, comprising a click that rotates integrally with this wheel, which forms a one-piece component comprising at least one spring-arm, at the end of which, on a first side, a beak cooperates directly with the toothing of a ratchet wheel in an operating position in which this spring-arm is free, and on a second side, a first hook can cooperate with a second hook of complementary shape, comprised in this one-piece click, in a rest position in which this spring-arm is in an extended position, the elasticity thereof allowing this first hook to be hooked or unhooked with respect to this second hook by the action of an operator, by maximum elongation of this spring-arm and/or by the tilting of this end.

The timepiece mechanism comprises a rotating wheel set, a support element, a pivoting member mounted on the support element and magnetic return means for returning one portion of the pivoting member against a surface of the rotating wheel set. The return means comprise a first magnet carried by the pivoting member and a second magnet carried by the support element. The first and second magnets are arranged such that, in normal operation, the interaction of their respective magnetic fields generates a magnetic force oriented to return said pivoting member portion towards said rotating wheel surface. At least one of the first and second magnets is arranged to permit reversal of its polarity, preferably with the aid of a tool, and thereby of the direction of the magnetic force acting on the pivoting member, said magnetic force then tending to move said pivoting member portion away from said rotating wheel set surface, which makes it easy to handle the various elements of the timepiece mechanism.

The timepiece mechanism comprises a rotating wheel set, a support element, a pivoting member mounted on the support element and magnetic return means for returning one portion of the pivoting member against a surface of the rotating wheel set. The return means comprise a first magnet carried by the pivoting member and a second magnet carried by the support element. The first and second magnets are arranged such that, in normal operation, the interaction of their respective magnetic fields generates a magnetic force oriented to return said pivoting member portion towards said rotating wheel surface. At least one of the first and second magnets is arranged to permit reversal of its polarity, preferably with the aid of a tool, and thereby of the direction of the magnetic force acting on the pivoting member, said magnetic force then tending to move said pivoting member portion away from said rotating wheel set surface, which makes it easy to handle the various elements of the timepiece mechanism.