Abstract: A device for controlling a gearbox, in particular for a motor vehicle, comprising fixed permanent magnets, mounted on a gearbox casing and cooperating by magnetic attraction or repulsion with a mobile permanent magnet mounted on a transmitter member driving into rotation or translation a shaft for selecting and/or changing gears, in order to define stable gear selecting or changing positions.

Abstract: A device for detecting the linear and angular positions of a moving element such as a gearchange finger in a motor vehicle gearbox, the moving element carrying at least one permanent magnet that is movable past a printed circuit card mounted on a stationary support and carrying magnetoresistance cells. The invention enables the transmission ratio engaged in a gearbox to be detected continuously.

Abstract: A device for controlling a gearbox, in particular for a motor vehicle, comprising fixed permanent magnets, mounted on a gearbox casing and cooperating by magnetic attraction or repulsion with a mobile permanent magnet mounted on a transmitter member driving into rotation or translation a shaft for selecting and/or changing gears, in order to define stable gear selecting or changing positions.

Abstract: An electric actuator, in particular for driving a gearbox selector shaft, the actuator comprising a coil guided in rotation between two flat permanent magnets carried by yoke plates, the coil being centered on the rotary spindle and having an angular stroke lying in the range 90° to 180°, its rotary spindle being connected by stepdown gearing to the gearbox selector shaft.

Abstract: A device for controlling a gearbox, in particular for a motor vehicle, comprising a lever pivotably mounted in a fixed support and permanent magnets borne by a components integral with the lever or displaceable by the latter and cooperating by magnetic attraction or repulsion with permanent magnets mounted on the fixed support along the paths covered by the permanent magnets displaced by the lever for defining stable positions of the lever, detent ball forces applied to the lever between the stable positions and forces for restoring the lever towards its stable positions.

Abstract: A device for detecting the linear and angular positions of a moving element such as a gearchange finger in a motor vehicle gearbox, the moving element carrying at least one permanent magnet that is movable past a printed circuit card mounted on a stationary support and carrying magnetoresistance cells. The invention enables the transmission ratio engaged in a gearbox to be detected continuously.

Abstract: A device for controlling an automatic gearbox, in particular for a motor vehicle, the device comprising means for actuating a selector shaft pivotally mounted in the gearbox, the actuator means being formed by a flat electric actuator comprising a flat coil mounted to pivot about a stationary pin between two flat permanent magnets carried by a yoke.