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 method of manufacturing a wheel includes an outer shape formation process in which etching is performed on a silicon wafer made of a brittle material to form the wheel including a plurality of teeth, a frame portion that is disposed outside the wheel, and a coupling portion that is more flexible than the teeth and couples the frame portion to a leading end portion of a corresponding one of the teeth, and a cutting process in which the coupling portion and the wheel are cut.

Escapement device, comprising: first escapement mobile element comprising a plurality of first blocking surfaces and a first drive toothing forming a first main drive toothing, a second escapement mobile element comprising a plurality of second blocking surfaces and a second drive toothing forming a second main drive toothing, an inertial element, a blocking mobile element, comprising: blocking surface portions, arranged to come into contact with the first escapement mobile element and with the second escapement mobile element, an impulse receiver, an impulse transmitter, characterized in that: the second main drive toothing and the first main drive toothing are engaged together and cooperate with the blocking mobile element in the same plane.

A timepiece mechanism including a pair of components with a first component including a material taken from a first group including solid monocrystalline, natural diamond, micro- or nano-crystalline CVD diamond, solid monocrystalline diamond, and amorphous carbon DLC, and having a first friction surface arranged to cooperate with a second friction surface included in a second opposing component and the second component includes, at least in its second friction surface, a material with a high concentration of boron, greater than 10 atomic percent, and, in a particular embodiment, this second opposing component includes at least one ceramic containing boron. Method for manufacturing such a mechanism. Method for transforming such a mechanism.

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 one-piece wheel set (20) including a first toothing (203) formed on the periphery of a first platform (201), and a second toothing (204) formed on the periphery of a second platform (202) integral with the first platform (201), the first toothing (203) includes a number of teeth which is an integer multiple of the number of teeth in the second toothing (204).

A wheel for an escapement system including a hub intended to be mounted with a staff for rotation therewith, the staff being intended to be subjected to a mechanical torque, a felloe, at least two arms extending from the hub to the felloe, and a toothing formed by a plurality of teeth. The wheel for the escapement system includes at least one recess on at least one of the faces thereof, the recess extending from the felloe to the hub.

Provided is an ambient physical variable measuring device (5) including an element configured to mechanically deform under the effect of a variation of a physical variable to rotate a physical variable measured value indication train including a physical variable maximum value display wheel (21). An indexing mechanism (40) to index the position of a physical variable maximum value display train (24) at each advance, the indexing mechanism (40) comprising a blocking organ (41) cooperating with an indexing wheel assembly (43). The the indexing wheel assembly (43) is kinematically connected to the physical variable maximum value display wheel (21) by a gear train T1, T2 and in that the gear ratio of the gear train T1, T2 between the physical variable maximum value display wheel (21) and the indexing wheel assembly (43) is a multiplication ratio.

A Moon phase and Earth phase display device (100) for a horological movement, which display device includes a dial (130) on which is arranged a plurality of graphical representations (112) symbolizing respectively different successive phases of a celestial body, said display device (100) further including a drive mechanism (140) configured to move a display (110), the display (110) including at least two indicator members (111) of different appearances, configured to symbolise the Moon and the Earth respectively, so that the position of the indicator members (111) relative to the graphical representations (112) represents a Moon phase indication and an Earth phase indication respectively.