Abstract: The present invention relates to a disconnectable electromagnetic eccentric actuator for controlling a mobile member for automatically adjusting a machine. The eccentric actuator comprises a ferromagnetic drive force transmitting screw and nut (of larger diameter than the screw) to convert into axial movement the cycloidal rolling movement of the screw relatively to the wall of the fixed nut, the latter itself forming an integral part of means for converting an electromotive force into a displaceable magnetomotive force whose resultant generated flux causes mutual adhesion, as well as said cycloidal relative movement of the screw and the nut. The screw disconnects when supply current is cut off. The invention is applicable to the automatic control of a flap for regulating the temperature of the intake air in heat engines.

Abstract: Gyroscope motor of the type comprising a magnetized rotor constituted by a permanent magnet in the shape of a toroid, within which are disposed the stator windings, the commutation being ensured by means of a static detector operating by variation of the impedance of a winding placed in the magnetic circuit, wherein the saturation of said magnetic circuit is obtained directly by means of the field of the rotor.