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 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 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 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 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 mechanism for displaying the periods of an annual cycle (100) for a timepiece (200) capable of being driven by being dragged by a running train (10) of a horological movement (1), characterised in that the mechanism for displaying the periods of an annual cycle (100) includes: an indicator indicating the periods of an annual cycle (110); an annual cycle train (120) capable of being driven by said running train (10) of the horological movement (1), and of rotating the indicator of the periods of an annual cycle (110); the mechanism for displaying the periods of an annual cycle (100) being characterised in that the annual cycle train (120) forms a gear train configured to have a ratio of 1:365.2 or a ratio that is a multiple of 1:365.2 between the running train (10) and the indicator of the periods of an annual cycle (110).

A mechanism for displaying the periods of an annual cycle (100) for a timepiece (200) capable of being driven by being dragged by a running train (10) of a horological movement (1), characterised in that the mechanism for displaying the periods of an annual cycle (100) includes: an indicator (110) indicating the periods of an annual cycle; an annual cycle train (120) capable of being driven by said running train (10) of the horological movement (1), and of rotating the indicator of the periods of an annual cycle (110); the mechanism for displaying the periods of an annual cycle (100) being characterised in that the annual cycle train (120) forms a gear train between the running train (10) and the indicator of the periods of an annual cycle (110) including at most four gearings.

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 control system for a rotating element of a timepiece including a control element for actuating the rotating element and a transmission device between the control element and the rotating element. In the control system a gearing device includes a hybrid gearing device including a first element, which is movable around a first rotation axis and including a drive runner made from elastomeric material, and a second element, which is movable around a second rotation axis and including a rolling tooth system. The drive runner cooperates with the rolling tooth system by friction.

A control system for a rotating element of a timepiece including a control element for actuating the rotating element and a transmission device between the control element and the rotating element. In the control system a gearing device includes a hybrid gearing device including a first element, which is movable around a first rotation axis and including a drive runner made from elastomeric material, and a second element, which is movable around a second rotation axis and including a rolling tooth system. The drive runner cooperates with the rolling tooth system by friction.