A timepiece indexing element cooperating coaxially with a component including an indexing relief element defining indexing positions, including a first bearing surface cooperating in abutment with the component, elastic return device exerting a radial thrust on this component to press it onto this first bearing surface, and indexing device cooperating with the indexing relief element, these elastic return devices include at least a first elastic arm including a first indexing surface comprised in this indexing device and arranged to exert a radial thrust force on the component and, at least a second elastic arm arranged to exert a radial thrust force on the first elastic arm.

A timepiece mechanism includes a structure in which at least one arbor of a wheel set is pivoted about an axis of rotation and a braking device for the mechanical braking at constant torque of this arbor. The braking device includes a braking component which is removable with respect to the structure and includes, for attachment thereof to the structure, a solid felloe, which carries a plurality of resilient elements, regularly distributed around a common axis about which these resilient elements each have a contact area. The contact areas together defining an opening, arranged to engage, in a press fit with elastic gripping, with the arbor, to make the common axis coincide with the axis of rotation of the arbor, and to apply to the arbor a substantially constant tangential braking force.

A horological torque limiting mechanism, including a first wheel with a first elastic arm projecting from a first felloe, a second wheel including a second surface to engage in frictional pressure with the first wheel for the relative actuation thereof, a travel limiter fastened to a structure to hold the first and second wheels in frictional pressure in certain angular positions, the second wheel and/or the travel limiter and/or the structure including a relief forming a ramp, to, in certain angular positions relative to the first wheel, engage in frictional pressure with the first elastic arm, and, in further positions, allow a frictionless travel between the first wheel and the component bearing the relief, the second wheel includes a second arm forming a ramp projecting from a second felloe.

A timepiece indexing element (10), coaxially cooperating with a component (20) including an indexing relief (30), including indexing parts (13) cooperating with this indexing relief (30) for their relative indexing in a plurality of indexing positions, and carried by first elastic arms (14) each including a first indexing surface (15), each first elastic arm (14) being arranged to exert a pushing force that is substantially radial relative to this component (20), and this indexing element (10) includes at least a first bearing surface (11) arranged, in the free state in a service position, to remain at a distance from a second complementary bearing surface (21) that a component (20) includes, and in the event of impact, to cooperate in abutment and/or guide bearing with the second complementary bearing surface (21), each first bearing surface (11) being carried by a second elastic bearing arm (40) cantilevered in the indexing element (10).

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 timepiece wheel set, including an arbor including a housing for reception of a plate and including, on either side of the housing, an axial abutment surface maintained in abutment on the plate, which includes a radially resilient arm and a second arm forming together a clamp clamping a radial bearing surface of the arbor in proximity to the axial abutment surface. The arbor further includes an entry ramp arranged to push back radially the first resilient arm and the second resilient arm, to allow the plate to be placed on the arbor.

A winding device (1), in particular for a barrel (2) provided with a spring, including a ratchet (3) mounted on a rotary winding shaft (5), the rotary winding shaft (5) being, for example, a winding shaft of the barrel (2), the rotation of which coils the barrel (2), and a winding gear train (4) meshing with the ratchet (3), the rotation of the winding gear train (4) causing the rotation of the ratchet (3) and that of the rotary winding shaft (5) by applying a torque to the ratchet (3), the winding device (1) being provided with means (10) for disconnecting the ratchet (3) and the rotary winding shaft (5), wherein the disconnection means (10) are arranged on the ratchet (3) and on the rotary winding shaft (5), and are configured to disconnect the ratchet (3) and the rotary winding shaft (5) when the torque applied to the ratchet (3) substantially exceeds a threshold value, in particular when the barrel (2) is fully coiled.

Transmission device (100), for example for a watch mechanism (110), in particular for a winding train (100, 201) of a watch movement (120), including an input element (6) intended to be driven only in a first direction, an output element, a first mechanical connection arranged such that the displacement of the input element in a first direction causes the displacement of the output element in a second direction, and a second mechanical connection (9, 9) arranged such that the displacement of the input element in the first direction causes the displacement of the output element in a third direction, the third direction being opposite the second direction.

Timepiece mechanism comprising a structure in which at least one arbor of a wheel set is pivoted about an axis of rotation, and comprising a braking device for the mechanical braking at constant torque of this arbor, the braking device comprises a braking component which is removable with respect to the structure and comprises, for attachment thereof to the structure, a solid felloe, which carries a plurality of resilient elements, regularly distributed around a common axis about which these resilient elements each have a contact area. the contact areas together defining an opening, arranged to engage, in a press fit with elastic gripping, with the arbor, to make the common axis coincide with the axis of rotation of the arbor, and to apply to the arbor a substantially constant tangential braking force.

A timepiece wheel set, including an arbor including a housing for reception of a plate and including, on either side of the housing, an axial abutment surface maintained in abutment on the plate, which includes a radially resilient arm and a second arm forming together a clamp clamping a radial bearing surface of the arbor in proximity to the axial abutment surface. The arbor further includes an entry ramp arranged to push back radially the first resilient arm and the second resilient arm, to allow the plate to be placed on the arbor.