A method for producing a tube for a friction system comprising the tube and an arbor, in particular a tube provided to rub around a pinion arbor, the method comprising a first stage of plastic deformation of the tube, in particular a first stage of plastic deformation of the tube that is controlled in deformation, followed by a second stage of hardening of the tube, in particular hardening by heat treatment.

A method for producing a tube (1) for a friction system comprising the tube (1) and an arbor (2), in particular a tube provided to rub around a pinion arbor, the method comprising a first stage of plastic deformation of the tube, in particular a first stage of plastic deformation of the tube that is controlled in deformation, followed by a second stage of hardening of the tube, in particular hardening by heat treatment.

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 method for producing a tube for a friction system comprising the tube and an arbor, in particular a tube provided to rub around a pinion arbor, the method comprising a first stage of plastic deformation of the tube, in particular a first stage of plastic deformation of the tube that is controlled in deformation, followed by a second stage of hardening of the tube, in particular hardening by heat treatment.

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 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 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.