Patent ID: 7673483

Claim:
An anti-theft device for a motor vehicle, comprising: a stator ( 12 ), a rotor ( 14 ) mounted to rotate in the stator ( 12 ) between a first angular position known as the “off” position and at least one second angular position, electrically deactivatable interrupt means ( 22 ) for interrupting return travel of the rotor ( 14 ) from the second angular position to the “off” position in a position known as the “non-return” position interpolated angularly between the second angular position and the “off” position, and mechanical means ( 32 ) for non-electrically deactivating the interrupt means ( 22 ) and thereby permitting return of the rotor from the “non-return” position to the “off” position without electric power, wherein the interrupt means ( 22 ) for interrupting the return travel of the rotor ( 14 ) comprise a complementary travel-interrupting stop ( 28 ) borne by a disk ( 18 ) which rotates with the rotor ( 14 ) and a translationally mobile rod ( 26 ) of an electromagnet ( 24 ) borne by the stator ( 12 ).