Abstract: The invention relates in particular to a return member for a balance wheel of a timepiece, replacing a spiral spring. This return member comprises a rake provided with a toothed sector arranged to work together with a balance wheel pinion. The rake has an axis of rotation allowing it to move between two extreme positions, called working positions, separated by a rest position. The return member also comprises two springs arranged to press the rake towards its rest position. Each spring is made up of an elastic blade arranged to store energy, then to return it to the rake. Each elastic blade works alternately so that they never work simultaneously. The invention also relates to an escapement comprising such a return member, a clockwork movement comprising this return member and a timepiece comprising such a movement.

Abstract: A two-directional date corrector mechanism controlled by a pull-out piece for a date mechanism. The mechanism includes a 24 hour wheel, a date updating finger pivoting integrally therewith, a date driving star-wheel, and a corrector star-wheel meshing therewith and located between the date driving star-wheel and the finger and configured to be uncouplable from the finger under action of an uncoupling mechanism controlled by the pull-out piece, the uncoupling mechanism having a coupling position where the corrector star-wheel meshes with the finger, and an uncoupling position where it is released from the finger to allow the date to be corrected. A date mechanism can include such a date corrector mechanism and a timepiece can include such a date corrector mechanism.

Abstract: A timepiece mechanism for a secondary display of a first physical quantity, wherein a push-button activates first mechanism for the coupling/uncoupling of the secondary display to or from a movement including a first display, and a pivoting first physical quantity cannon-pinion heart, wherein the first mechanism controls the coupling/uncoupling to or from the movement. A second push-button controls the zero reset of the secondary display, by uncoupling the first coupling/uncoupling mechanism, and returning the heart-piece to the original position thereof. A second coupling/uncoupling control mechanism includes either a pivoting time zone wheel set including a friction wheel, meshing with the movement, and a time zone wheel which, when the wheel set is in the coupling position, drives a second physical quantity cannon-pinion heart and/or a third physical quantity cannon-pinion heart, the friction wheel and time zone wheel being coaxial and cooperating via friction; or an inter-time zone mechanism.

Abstract: A two-directional date corrector mechanism controlled by a pull-out piece for a date mechanism. The mechanism includes a 24 hour wheel, a date updating finger pivoting integrally therewith, a date driving star-wheel, and a corrector star-wheel meshing therewith and located between the date driving star-wheel and the finger and configured to be uncouplable from the finger under action of an uncoupling mechanism controlled by the pull-out piece, the uncoupling mechanism having a coupling position where the corrector star-wheel meshes with the finger, and an uncoupling position where it is released from the finger to allow the date to be corrected. A date mechanism can include such a date corrector mechanism and a timepiece can include such a date corrector mechanism.

Abstract: The timepiece movement includes a barrel, an escapement that has an escape wheel and pinion (27, 25), a balance (19) and a gear train for transmitting energy stored in the barrel to the escape wheel. This gear train has an intermediary wheel (23), kinematically connected to the barrel by a first part of the gear train, and kinematically connected to the escape wheel (27) by a second part of the gear train, the second part of the gear train, and the escapement and balance are mounted in a rotating carriage (16) kinematically connected to the movement and arranged for rotating coaxially about the intermediary wheel (23) at a different speed from the speed of the intermediary wheel. The timepiece movement is characterized in that it imposes a speed of one revolution per minute on the carriage (16).

Abstract: The invention concerns an oscillating weight (1) for an automatic winding watch, including a power reserve indicator device (100) integrated in said oscillating weight (1) and including means (20) for displaying the power reserve by comparison to complementary display means (30), said display means (20) and complementary display means (30) being integrated in said oscillating weight (1). Said display means (20) and complementary display means (30) are movably mounted to rotate synchronously, at a given moment, relative to said oscillating weight (1). The invention also concerns an automatic winding watch including an oscillating weight (1) of this type, whose movements are transmitted to a mainspring of said watch.

Abstract: The tourbillon mechanism is characterized in that it includes a toothed wheel (127; 227) and at least two toothed elements (125A, 125B; 225A, 225B, 225C) pivoting in the carriage (103), the toothed wheel, which meshes with the escape pinion (111 B), being freely mounted in the carriage in a coaxial position, and said at least two toothed elements (125A, 125B; 225A, 225B, 225C) being regularly spaced around said toothed wheel (127; 227) with which said toothed elements mesh, said at least two toothed elements each being designed to mesh with the fixed toothing (119; 219), so as to connect the escape pinion to the fixed toothing.

Abstract: Mechanism (100) for the additional secondary display (2) of a first physical quantity, wherein a push-button (4) activates first means for the coupling/uncoupling of said secondary display (2) to or from a movement (6) including a first display (1), and a pivoting first physical quantity cannon-pinion heart (36), wherein said first means control the coupling/uncoupling to or from said movement (6). A second push-button (5) controls the zero reset of said secondary display (2), by uncoupling said first coupling/uncoupling means, and returning said heart-piece (36) to the original position thereof.

Abstract: The invention concerns an oscillating weight (1) for an automatic winding watch, including a power reserve indicator device (100) integrated in said oscillating weight (1) and including means (20) for displaying the power reserve by comparison to complementary display means (30), said display means (20) and complementary display means (30) being integrated in said oscillating weight (1). Said display means (20) and complementary display means (30) are movably mounted to rotate synchronously, at a given moment, relative to said oscillating weight (1). The invention also concerns an automatic winding watch including an oscillating weight (1) of this type, whose movements are transmitted to a mainspring of said watch.

Abstract: The tourbillon mechanism is characterized in that it includes a toothed wheel (127; 227) and at least two toothed elements (125A, 125B; 225A, 225B, 225C) pivoting in the carriage (103), the toothed wheel, which meshes with the escape pinion (111 B), being freely mounted in the carriage in a coaxial position, and said at least two toothed elements (125A, 125B; 225A, 225B, 225C) being regularly spaced around said toothed wheel (127; 227) with which said toothed elements mesh, said at least two toothed elements each being designed to mesh with the fixed toothing (119; 219), so as to connect the escape pinion to the fixed toothing.

Abstract: The large date mechanism comprises three superposed indicator discs (1, 2, 3). The lower disc (3) bears eleven numerals (8) and the upper (1) and intermediate (2) discs each bear ten numerals (4, 6) and a window (5, 7). Each of the discs is integral to a star wheel (12, 13, 14) with cannon pinions (9, 10, 11). The cannon pinion star wheels are selectively driven by a control movement (15) comprising three toothed sectors (19, 18, 17) integral to a calendar day wheel (16) that advances one step per day. The mechanism can be supplemented by a safety device ensuring blocking of the star wheels when they should be stationary.

Abstract: The timepiece movement includes a barrel, an escapement that has an escape wheel and pinion (27, 25), a balance (19) and a gear train for transmitting energy stored in the barrel to the escape wheel. This gear train has an intermediary wheel (23), kinematically connected to the barrel by a first part of the gear train, and kinematically connected to the escape wheel (27) by a second part of the gear train, the second part of the gear train, and the escapement and balance are mounted in a rotating carriage (16) kinematically connected to the movement and arranged for rotating coaxially about the intermediary wheel (23) at a different speed from the speed of the intermediary wheel. The timepiece movement is characterized in that it imposes a speed of one revolution per minute on the carriage (16).

Abstract: The invention concerns a timepiece gear train including at least one pair of circular toothed elements (25, 31) with parallel axes, the elements being provided with respectively toothings that are meshed with each other so that one (25) of the elements drives the other. In order to improve transmission conditions within the gear without reducing the toothing module, the corresponding toothings of each of the two elements are multiple, each of them being formed of N coaxial, toothed rings (28a, 28b; 30a, 30b) angularly shifted relative to each other by a fraction of a pitch of the toothing. In the simplest version, each of the toothings is double (N=2), the two rings being angularly shifted by a half-pitch. The invention prevents gearing in areas located relatively far from the line connecting the centres of the toothed elements, thus reducing torque and velocity variations during the lead of a tooth.

Abstract: The large date mechanism comprises three superposed indicator discs (1, 2, 3). The lower disc (3) bears eleven numerals (8) and the upper (1) and intermediate (2) discs each bear ten numerals (4, 6) and a window (5, 7). Each of the discs is integral to a star wheel (12, 13, 14) with cannon pinions (9, 10, 11). The cannon pinion star wheels are selectively driven by a control movement (15) comprising three toothed sectors (19, 18, 17) integral to a calendar day wheel (16) that advances one step per day. The mechanism can be supplemented by a safety device ensuring blocking of the star wheels when they should be stationary.

Abstract: Correction mechanism consisting of a corrector (K) mounted so as to pivot (1) and provided with a roller-pin (P) pressing against a rod (T) under the action of a spring (Kr). The rod (T) has two parts (Ta, Tb) of different diameters. When the roller-pin (P) is pressed against the large-diameter part (Ta), the corrector (K) is moved away from the wheel (R2) to be blocked or to be driven. A pull on the rod (T) enables the roller-pin (P) to move onto the smaller-diameter part (Tb), this having the effect of causing the corrector (K) to work in a negative manner. Such a corrector is advantageously used by itself or with a similar corrector in a double-faced watch.

Abstract: Digital-analog display device for timepiece comprising a cannon pinion (1), consisting of an analog disk (2) mounted on the cannon pinion and having a window (3) through which there appears a digit carried by a digital disk (5) mounted coaxially to the analog disk (2). The digital disk is driven in rotation by the cannon pinion by jumping means and its rotation relative to the analog disk is ensured by an eccentric moveable element (12) provided with a finger (13) which drives, on each revolution, a toothed wheel (6) integral with the digital disk (5).

Abstract: A winding and setting arrangement for a timepiece comprises a two-part stem extending through the hollow shaft of the spring drum. The outer part of the stem is affixed at its outer end to a crown and at its inner end has Breguet teeth which, in an inner position of the stem, are engageable with Breguet teeth of a connecting member which is non-rotatable but axially movable in a cavity in the hollow spring drum shaft. A spring urges the connecting member outwardly against a shoulder in the shaft. The inner part of the stem is coupled with the outer part by a square section so that the two parts rotate together but are axially movable relative to one another. The inner stem part passes freely through the connecting member and, inwardly of the spring drum, carries a pinion which is engageable with a setting wheel in an outer position of the stem. A spring urges the inner stem part outwardly.