Abstract: A positioning mechanism for a toothed wheel mounted on a rotatable staff in a watch movement, the positioning mechanism including a positioning lever exhibiting a flat lateral edge configured to cooperate with at least one flat provided on the staff of the toothed wheel. The positioning lever includes a pivot arm mounted in a pivotable manner about a pivot pin provided in the watch movement, a positioning element exhibiting the flat lateral edge and mounted in an articulated manner on the pivot arm, and a mechanism adjusting and locking the position of the positioning element on the pivot arm in relation to the staff of the toothed wheel.

Abstract: A positioning mechanism for a toothed wheel mounted on a rotatable staff in a watch movement, the positioning mechanism including a positioning lever exhibiting a flat lateral edge configured to cooperate with at least one flat provided on the staff of the toothed wheel. The positioning lever includes a pivot arm mounted in a pivotable manner about a pivot pin provided in the watch movement, a positioning element exhibiting the flat lateral edge and mounted in an articulated manner on the pivot arm, and a mechanism adjusting and locking the position of the positioning element on the pivot arm in relation to the staff of the toothed wheel.

Abstract: A mechanism and a timepiece module independent of the bottom plate of a movement, of a simple and compact design. The timepiece mechanism includes a control stem (3) mounted in a pivoting manner and movable between at least two axial positions, a control pinion (11; 13) mounted so as to rotate with the control stem (3), and at least one actuating member (15, 24; 30) configured to engage with the control pinion (11; 13) when the control stem is occupying one of the axial positions. The control pinion (11; 13) is also coupled translationally to the control stem (3) when the latter moves from one to the other of the two positions. The module includes a case (2) containing the mechanism.

Abstract: Mechanical oscillator for a timepiece including a balance (10) and a hairspring (12). The balance (10) and the hairspring (12) are produced from the same material. This material is non-magnetic and has a very low coefficient of thermal expansion.

Abstract: A mechanism and a timepiece module independent of the bottom plate of a movement, of a simple and compact design. The timepiece mechanism includes a control stem (3) mounted in a pivoting manner and movable between at least two axial positions, a control pinion (11; 13) mounted so as to rotate with the control stem (3), and at least one actuating member (15, 24; 30) configured to engage with the control pinion (11; 13) when the control stem is occupying one of the axial positions. The control pinion (11; 13) is also coupled translationally to the control stem (3) when the latter moves from one to the other of the two positions. The module includes a case (2) containing the mechanism.

Abstract: A timepiece, in particular a wristwatch, includes a constant-force device for acting on an oscillating system, the constant-force device including a switching unit and a tensioning module having a primary spring-energy store and a secondary spring-energy store. A seconds shaft bearing a seconds wheel and a cam plate is driven to rotate constantly by the secondary spring-energy store. The seconds wheel drives the oscillating system, and the cam plate acts on the switching unit for the periodic tensioning of the secondary spring-energy store by the primary spring-energy store.

Abstract: A watch movement with a mechanical source of energy is provided. In one implementation, the watch movement comprises a frame intended to support moving parts and defining upper and lower faces. The distance between the upper and lower faces may define a movement thickness. Further, springs may be provided for storing the energy, each being housed in a barrel. At least three barrels may be provided, the first and the second of which are superposed and the third of which is placed laterally to the other two and within their thickness.

Abstract: The invention concerns a chronograph mechanism of the type comprising a chronograph train (22) including: a coupling lever (16) for ensuring the movement of a coupling wheel, between a first position in which the mechanism is operating and a second position in which the mechanism is not operating, and a control lever (26) activating the coupling lever (16) to make it pass from one position to another. In this mechanism, the control lever (26) carries a locking member (36) and the coupling lever (16) a catch (20) cooperating with the locking member when the coupling wheel (14) occupies its first position, such that the coupling lever (16) is prevented from moving via the effect of a shock when the chronograph is operating.

Abstract: The invention concerns a chronograph mechanism of the type comprising a chronograph train (22) including: