The Swatch Group Research and Development Ltd

Nicolas Livat

Jérôme Favre

Michel Willemin

Matthias Imboden

Cédric Nicolas

Jean-Pierre Mignot

A winding device includes a motor for driving a watch holder carrying at least one automatic watch with a mobile oscillating mass, and a multimeter for measuring a variation in a resistive torque opposed to the motor by the watch holder equipped with watches, depending on a degree of winding of the watches. The multimeter includes a speed meter to determine a speed and/or a variation in the speed of the motor, a torque meter to determine a value of a torque and/or a variation in the torque at the watch holder, and/or a current meter to determine a value of a current and/or a variation in the current of an electric motor.

Winding device for automatic watch

A magnetic microactuator () including a coil () controlling the axial movement of a sliding block () including at least one permanent magnet () joined or aligned with a ferromagnetic or magnetised rear arbor () and guiding the field lines of the magnetic field of revolution in the axial direction (D) through the coil () wherein circulates the sliding block (), up to a rear end () of said rear arbor () that tends to cooperate by magnetic attraction with at least one first ferromagnetic restoration element (), located in the vicinity of a rear face () of the structure () of the microactuator (), in order to bring said sliding block () back into a rear end-of-travel position when no coil () is powered.

Solenoid microactuator with magnetic retraction

An arrangement for the holding and vibration transmission of an acoustic radiating membrane () in a striking or musical watch () case (). The case includes at least one crystal () mounted on a middle () and a back () mounted on a side opposite the middle. The acoustic radiating membrane is held in a portion of the watch case, such as the middle by at least one connection part () disposed between a peripheral rim of the membrane or an edge element () of the membrane and the middle by acting for the holding of the membrane in a direction parallel to the plane of the watch. The connection part may be a screw screwed into a threaded opening () of the middle and coming into contact with the edge element of the membrane.

Growing community of inventors

Cressier, Switzerland

Nicolas Livat