The timepiece movement is provided with a movable element (22A) capable of being momentarily immobilised in any one of N discrete stable positions, and with a device (44) for positioning said movable element comprising a lever (26A) and a magnetic system (28) formed of a first magnet (30) integral with the lever, with N second magnets (32) integral with the movable element and arranged along an axis of displacement, and with a highly magnetically permeable element (34) arranged facing one polar end of the first magnet located on the side of the movable element. The polarity of the first magnet is reversed with respect to that of the second magnets. A first magnetic torque exerted on the lever carrying the first magnet has a first direction over a first section and a second direction, opposite to the first direction, over a second section of the distance between two successive stable positions, the first direction defining a return torque towards the movable element for a contact portion (46) of the lever. For each of the N discrete stable positions, the first magnetic torque is applied in said first direction. In particular, the movable element is a date ring and the stable positions are date display positions.

A watch includes a timepiece movement including a mechanism for displaying a time period or season which includes a first wheel which is provided in order to turn once in thirty-one days for displaying a day of the month, and a second wheel for displaying another time period or season. The second wheel turns more quickly than the first wheel for displaying this time period or season, and the second wheel is provided in order to be displaced from the first wheel, at the rate of one turn in a period of time between 340 days and 380 days.

An electronic clock mechanism includes an analog display device including a ring of dates and a stopwatch hand associated with a graduation of a small counter. The ring and hand are driven by a same electric motor via a permanent gear train, the hand being mounted on a wheel of the permanent gear train, the wheel arranged between a motor pinion and a movable element including a date driving wheel. The ring and date driving wheel respectively include two sets of teeth forming a permanent gear having a relatively large clearance to define a dead angle region for the date driving wheel as the ring is positioned by a jumper. The dead angle region is used to drive the stopwatch hand independently of the ring. The permanent gear train is arranged such that torque for positioning the rotor creates for the date driving wheel a blocking torque for shock-resistance.

The invention relates to a device for the display of periods which, in succession, form an annual cycle, for a timepiece movement, comprising an indicator member for indicating said periods. It comprises at least a mechanism for controlling the duration of display of said periods including at least: a drive member for driving the indicator member arranged to drive the indicator member at the moment of a change in period, a cam controlling the duration of display of said periods, and means for driving the cam, a first differential gear with two inputs and one output, a first input being formed by a reference drive wheel, arranged to complete one revolution in one reference period, a second input being formed by an actuation member arranged to cooperate with said cam, and the output being formed by said drive member for the indicator member,
said cam comprising a profile arranged such that the actuation member cooperates with the first differential gear to move the drive member for the indicator member forwards or backwards, depending on the duration of the period displayed relative to the reference period.

An electronic clock mechanism includes an analog display device including a ring of dates and a stopwatch hand associated with a graduation of a small counter. The ring and hand are driven by a same electric motor via a permanent gear train, the hand being mounted on a wheel of the permanent gear train, the wheel arranged between a motor pinion and a movable element including a date driving wheel. The ring and date driving wheel respectively include two sets of teeth forming a permanent gear having a relatively large clearance to define a dead angle region for the date driving wheel as the ring is positioned by a jumper. The dead angle region is used to drive the stopwatch hand independently of the ring. The permanent gear train is arranged such that torque for positioning the rotor creates for the date driving wheel a blocking torque for shock-resistance.

A method and device for coupling a rigid element with a spring when assembling or mounting a horological device includes the steps of rigidly attaching the first end of the spring to a support and of positioning the support and the rigid element in an initial relative position in which a coupling member, carried by the spring at its second end, is located on one side of a stressing ramp which is opposite a specific recess in the rigid element and from which the rigid element and the support can undergo a relative movement (MR) in a first direction (D1). A relative movement is applied between the support and the rigid element in the first direction so that the coupling member comes to bear against the stressing ramp and then follows this stressing ramp, which is configured to thus move the coupling member towards the axis of rotation by stressing the spring. The relative movement is continued until the coupling member penetrates at least partially into the specific recess.

A horological movement provided with an indicator and includes a mechanism for driving this indicator in jumps, the mechanism including a wheel platform, a rigid part defining a driving finger, and a spring having a first end attached to the wheel platform for rotation therewith and a second end attached to the rigid part for rotation therewith. The mechanism is arranged so that the spring contracts when this spring is loaded to generate a jump by the indicator. An angular displacement of the driving finger relative to the wheel platform is then limited, when the spring is contracted, by an angular stop attached to the wheel platform for rotation therewith. The indicator and the mechanism are arranged so that a jump by the indicator cannot occur, in normal operation, before the angular displacement is stopped by the angular stop, after a loading of the spring preceding this jump, and thus corresponds to a predetermined angular distance ().

A horological movement includes an indicator, a mechanism for driving this indicator in jumps, a wheel platform having a first axis of rotation, a driving finger for driving the indicator, and a spring having a first end attached to the wheel platform for rotation therewith and a second end attached to the driving finger for rotation therewith. The mechanism includes a rigid support rotatable about the first axis of rotation relative to the wheel platform, and a lever mounted on the rigid support so as to be rotatable about a second axis of rotation which is distant from the first axis of rotation, and forming the driving finger. The mechanism limits the rotation of the lever in a first direction when the spring is being loaded and the indicator is making its next jump, the lever being able to rotate in the opposite direction to the first direction, thus allowing the driving finger to radially retract, towards the first axis of rotation, under the action of a radial force exerted on this driving finger.

The instantaneous jump timepiece calendar system (100) includes an energy accumulation and restoration device including an energy accumulator (4) and a cam (33), a date mobile (1), a month mobile (2), a first element (7) for indexing the date mobile (1), a second element (8) for indexing the month mobile (2), a mobile (3) for driving the date mobile by restoring energy from the energy accumulator (4), and an element (6b) for driving the month mobile by restoring energy from the energy accumulator (4), the element (6b) for driving the month mobile being arranged and/or configured to limit the movement of the month mobile after the driving of the month mobile.

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).