A moon phase display includes a frame and a plurality of display elements supported by the frame and rotatable relative to the frame. The plurality of display elements further includes a first side face on which an illuminated moon portion is depicted and a second side face. A first rotational position in which the first side face is arranged along a display plane wherein the first side faces together arranged on along the display plane represent a full moon. A second rotational position in which the second side face is arranged along the display plane. A drive rotates each of the plurality of display elements independently. A controller actuates the drive so that each one of the plurality of display elements is rotated into the second rotational position until all of the plurality of display elements are located in the second rotational position.

The timepiece calendar system (200) includes a date mobile (4) which is displaceable step by step relative to a frame (199), a first drive finger (21) for driving the date mobile (4). a first tooth (51) for driving the date mobile (4), the first tooth (51) being mounted on the date mobile (4) so as to be displaceable between a deactivated, or retracted, position and an activated, or drive, position, an activation system (6, 7) for activating the first tooth (51); the first drive finger (21) and the first tooth (51) being arranged such that a single action of the first drive finger (21) on the first tooth (51) can displace the date mobile (4) through N steps, N being an integer such that N>1, notably N=2 or N=3.

The timepiece calendar system (200) includes a date mobile (4) displaceable step by step relative to a frame (199); a first drive finger (21) for driving the date mobile (4); a first tooth (51) for driving the date mobile (4), the first tooth (51) being mounted on the date mobile (4) so as to be displaceable between a deactivated, or retracted, position and an activated, or drive, position; an activation system (6, 7) for activating the first tooth (51); the first drive finger (21) and the first tooth (51) being arranged such that a single action of the first drive finger (21) on the first tooth (51) displaces the date mobile (4) through n steps, with n being an integer of any value between 1 and N, N being an integer with N>1, depending on the moment when the first tooth (51) is activated by the activation system (6, 7).

The movement transmission system (90), notably for a timepiece calendar system (200), includes a driving mobile (4) pivoted about a first axis (A4) and has a driving toothset (42) distributed over a curved profile (43); a driven mobile (7) pivoted about a second axis (A7) and having a driven toothset (72); an intermediate pinion (8) pivoted about a third axis (A8) and having a toothset (81) driven by the driving toothset (42) and driving the driven toothset (72); the toothset (42), the curved profile (43), the driven toothset (72) and the toothset (81) being arranged at a same level or in a same plane, and the driving mobile (4), the driven mobile (7) and the intermediate pinion (8) being arranged so that the driving mobile (4) moves the driven mobile (7) via the intermediate pinion (8) through 1/m steps for at least some steps of the driving mobile (4), m being a real number greater than 1, and so that the driving mobile (4) can define an angular position, with minimum play, of the driven mobile (7) via the pinion (8), whereas the driving mobile (4) is in a given angular position.

The invention relates to an indicator device (D) for watchmaking, in which a drive toothed wheel (3) rotates a driven programme wheel (2) which is configured substantially as a circular crown with an external toothing (20) and an internal toothing (21). The latter meshes with an eccentric internal toothed wheel (1), whose cycloidal rotary movement with a suitable transmission ratio, allows the information given on the programme wheel (2) to be indicated. The device is suitable for making perpetual calendars of the clocks.

A timepiece display mechanism including a barrel with a spring between the arbor of a first wheel set driven by a drive wheel set, and a drum carrying a peripheral snail cam traversed by a feeler controlling the periodic jump of a display member, this drum carrying an peripheral finger outside the trajectory of this feeler, this first wheel set including an eccentric crank pin permanently guiding a groove to control the periodic back and forth motions of a pivoting anchor piece, which includes, on either side of an anchor piece axis, a beak and a stop for stopping or releasing this finger depending on the angular position of this anchor piece, the angular travel of each finger between its release by this beak and return to abutment on this stop defining the jump duration.

A timepiece movement includes: an hour wheel and pinion; a minute wheel and pinion; a winding stem; a time difference correction train; a date indicator; and a date change mechanism. The hour wheel and pinion includes an hour wheel that rotates with the minute wheel and pinion, an hour jumper, an hour jumper pinion, and an hour wheel body that turns with the hour wheel via the hour jumper and hour jumper pinion, and turns with the time difference correction train. The date change mechanism includes a date change wheel that turns with the hour wheel body, a date change lever, a date change cam that flexes the date change lever by rotating with the date change wheel, and turns in response to the flexed date change lever spring force, and a date change pawl that rotates with the date change cam, and advances the date indicator.

A timepiece display mechanism including a barrel with a spring between the arbor of a first wheel set driven by a drive wheel set, and a drum carrying a peripheral snail cam traversed by a feeler controlling the periodic jump of a display member, this drum carrying an peripheral finger outside the trajectory of this feeler, this first wheel set including an eccentric crank pin permanently guiding a groove to control the periodic back and forth motions of a pivoting anchor piece, which includes, on either side of an anchor piece axis, a beak and a stop for stopping or releasing this finger depending on the angular position of this anchor piece, the angular travel of each finger between its release by this beak and return to abutment on this stop defining the jump duration.

A timepiece movement includes: an hour wheel and pinion; a minute wheel and pinion; a winding stem; a time difference correction train; a date indicator; and a date change mechanism. The hour wheel and pinion includes an hour wheel that rotates with the minute wheel and pinion, an hour jumper, an hour jumper pinion, and an hour wheel body that turns with the hour wheel via the hour jumper and hour jumper pinion, and turns with the time difference correction train. The date change mechanism includes a date change wheel that turns with the hour wheel body, a date change lever, a date change cam that flexes the date change lever by rotating with the date change wheel, and turns in response to the flexed date change lever spring force, and a date change pawl that rotates with the date change cam, and advances the date indicator.

An indicator device for watchmaking has a drive toothed wheel which rotates a driven programme wheel is substantially a circular crown with an external toothing and an internal toothing. The latter meshes with an eccentric internal toothed wheel whose cycloidal rotary movement with a suitable transmission ratio allows the information given on the programme wheel to be indicated. The device is suitable for making perpetual calendars of the clocks.