Abstract: An electric motor has a disk brake which is designed as an electromagnetically operated spring-loaded brake, acts as a standstill brake and has a thin, elastically flexible brake disk (12) of spring steel. This brake disk (12) is immovably fixed on the motor shaft (2) between an axially movable, rotationally fixed armature (8) of the electromagnet and a stationary brake part (13) which forms the outer brake housing. The annular stator (4) of the electromagnet surrounds the motor shaft, with formation of a free annular space which offers room for further attaching parts, for example a tachometer generator and/or a phase-angle sensor, or else for a ball bearing carrying the shaft. Borne axially displaceably in the stator (4) is a coil (6) which, in the braking state, is pressed by compression springs (7) against the armature (8), which for its part presses an annular rim zone (12a) of the brake disk (12), with elastic deformation of the same, against the stationary brake part (13).

Abstract: The present invention relates to a brush-holder for flat-commutator electromechanical transducer.The brush secured by screws (11) to the flange (2) of the transducer consisting in this case of a motor having a flat rotor (5) comprises a supporting ring (12) and guide sockets (13). The sockets (13) and the brushes (14) have the shape of a circular arc segment. The socket end opposite the end facing the commutator (6) is closed by a cover (16) screwed in the socket (13). The cover (18) is attached to a coil spring (19) secured in turn to the brush (14). Access to the end of a socket (13) closed by the cover (18) can be had by removing a plug (17) of the stator cage (16) of a device coupled to the motor.