A timepiece mechanism includes a first energy source with a regulating member, a second independent energy source, a control member driven by the second energy source, and a blocking device controlled by the first energy source to block the second energy source and release it to allow the control member to be displaced by jumps powered by the second energy source. The blocking device includes first and second mobile parts kinematically interconnected, the first mobile part including a drive device, the second mobile part including a stopping device; a rotating drive member connected to the first energy source and cooperating with the drive device to displace the mobile parts, alternately in opposite directions; and a rotating blocking member connected to the second energy source and cooperating with the stopping device to be blocked by the second mobile part and released at the determined times by second mobile part movement.

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 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.

A display mechanism (10) for a timepiece (1000), with a leap year display integrated in a month display, comprising a control mechanism (3) that drives, once per month, about an axis (D), a month display wheel set (2) arranged underneath a dial (1), having a month window (1C) in a quadrant allowing the display of only one quarter of the month display wheel set (2), which completes one revolution in four years, and bears, on an angular sector of 90°, at least one characteristic leap year marking, and either carries indices, each arranged to indicate one month on a static month scale of the dial (1), or equidistant month markings, wherein one of the month markings is pointed to by a fixed mark of the dial (1).

A display mechanism (10) for a timepiece (1000), with a leap year display integrated in a month display, comprising a control mechanism (3) that drives, once per month, about an axis (D), a month display wheel set (2) arranged underneath a dial (1), having a month window (1C) in a quadrant allowing the display of only one quarter of the month display wheel set (2), which completes one revolution in four years, and bears, on an angular sector of 90°, at least one characteristic leap year marking, and either carries indices, each arranged to indicate one month on a static month scale of the dial (1), or equidistant month markings, wherein one of the month markings is pointed to by a fixed mark of the dial (1).

An instantaneous date control device for a timepiece, in particular for a mechanical wristwatch, including: a date disc, a gear train forming a kinematic linkage between the control device and a horological movement of said timepiece, a first mobile including a first toothed wheel driven at a speed of one turn per day and a cam mounted freely rotatably, over a limited angular range and/or in a single direction of rotation, as well as temporarily coupled in rotation to said first toothed wheel, a second mobile including a second toothed wheel driven at a speed of one turn per day, an unlocking and driving yoke carrying a feeler bearing on said cam and a driving finger which can mesh with teeth located on the date disc, an unlocking and driving spring, and a retaining means allowing to secure the angular position of the date disc between two instantaneous jumps.

Grand date calendar display device for a watch movement comprising a first disc and a second disc, arranged to display, at least on certain dates, first date values through a combination of symbols borne by the first disc and symbols borne by the second disc, wherein the device includes a first coupling mechanism and a second coupling mechanism between the first disc and the second disc such that, at least on certain dates, the first disc drives the second disc, and on certain other dates, the second disc drives the first disc.

Disclosed is a display mechanism for a timepiece, including a frame, an aperture which is fixed relative to the frame and a first and a second display disc each bearing indications, characterized in that it makes it possible to display the indications of the first and second discs alternately through the aperture. The invention also relates to a timepiece movement including such a mechanism, and to a timepiece such as a wrist watch, a pocket watch, a clock or a miniature clock including such a timepiece movement.