Abstract: A magnetic ring (1) is provided, comprising a magnetic disc (2) and an annular disc (10). The annular disc (10) is coated, by injection molding or die-casting, with a magnetizable material so that two spring tongues (20,21) protrude from the inner rim of the magnetic disc (2) which are able to exert a clamping effect on a shaft or rod (30).

Abstract: A brush holder plate includes plugs with a blade terminal and an extension connected thereto. The plugs with their extension are inserted from below into the brush holder plate which is provided with sleeves on its top surface. The extension is passed through the sleeve, and a strand is slipped from the other side into the sleeve. An electrical connection between the strand and the plug is produced by pinching the sleeve, on the one hand, and the plug is fixed mechanically on the brush holder plate, on the other hand.

Abstract: The invention describes a carbon brush for an electrical machine. Carbon brushes of this type need to fulfill two requirements. First, the carbon brush should be as resistant to abrasion as possible. Second, as little noise as possible should be generated at the brush/collector crossover during the operation of the motor. Consequently, the invention proposes to bevel the face surface of the carbon brush, and to provide the face surface with transverse grooves within its lower region.

Abstract: This invention relates to a carbon brush for an electric motor. These carbon brushes are guided in tubular brush holders and are pressed against a commutator. Furthermore, the brushes of the present invention include inclined side edges so that the front frontal surface has a trapezoidal cross-section. The consequence thereof is that, when sliding along the commutator, the commutator bars will always support the side edges over the major part of their length. The ratchet effect is thus suppressed.

Abstract: In order to be able to completely eliminate the axial play of an armature spindle of an electric motor, especially for a windshield wiping system of a motor vehicle, even though conditions change over time, a prestressing member acted upon by a spring leg continuously presses against the end of the armature spindle. The prestressing member does not necessarily have to abut directly on the end of the armature spindle, but rather a cap is inserted onto the end of the armature spindle and non-rotatably fixed to the motor housing or a gear housing. An eccentric formed as the housing of the prestressing member abuts on the outside of the bottom of the cap. In an alternative embodiment, a mushroom shaped prestressing member having a mushroom head presses against the end of the armature spindle.

Abstract: In order to connect a pump (1) with an electric motor (2) quickly and form-fittingly, a hollow, tappet-shaped stud (6) is formed onto the pot-shaped motor housing (7), specifically onto the bottom of the pot (10). The stud engages an insertion recess (5) of the pump. A driving eccentric (4) of the driven shaft (3) is connected with the pump during the assembly of the pump. If the inside of the tappet-shaped stud (6) is to receive the first motor bearing, a fit is needed at the inside as well as at the outside of the stud. If the motor housing (7) is made from deep drawn sheet metal, the double fit is only possible, if, when viewed in the circumferential direction, the cross section of the wall of the stud (6) is formed like a wave. This facilitates the use of a plastic cover (18) in connection with the sheet metal housing (7) and the avoidance of a carbon brush support plate.

Abstract: The present invention relates to a drive unit, in particular for a windshield wiper system on a motor vehicle, comprising a drive motor, a gearing accommodated in a gear housing and following the drive motor, which gearing has an output shaft driven in pendulum fashion and a pinion seated on it in a manner protected against twisting as well as including a stop member for limiting the pendulum angle of the output shaft. The stop member is either swivellable with the pinion or firmly arranged on the output shaft. In order to obtain a good guidance and a reliable hold of the stop member it is pushed upon the output shaft by means of a ring-shaped portion. In particular the ring-shaped portion can simultaneously serve as a buffer disc for the pinon, so that in comparison with a known drive unit, piece parts can be saved.

Abstract: Pendulum gears for windshield wipers of motor vehicles are known, which pendulum gears comprise a first gear member provided with teeth, which gear member is non-rotatably seated on a driven shaft, and a second gear member provided with teeth, which gear member meshes with the first gear member, and by which the first gear member can be driven in pendulum motion between two reversing positions. The noises occurring in the reversing positions of the first gear member are to be reduced. For this purpose the tooth play between the teeth of the two gear members is decreased towards the reversing position of the first gear member. Thus a beating noise caused by the teeth when changing the tooth flanks is avoided.

Abstract: An electric motor, especially an electric, small-power motor for driving wiper systems of motor vehicles, in which an electronics housing (50) is arranged beside a motor housing (10) by affixing the electronics housing to a central bulge (13) on the bottom (12) of the motor housing (10).

Abstract: An adjusting device for a door locking system of motor vehicles is described which prevents, by means of a mechanical brake device, the motor after being switched off from further running. Before an adjusting process is started, this brake device simultaneously checks if the adjusting force of the motor is sufficient to actuate the driven element. Moreover, a coupling is realized in the power transmission path by means of a crank pin axially movable.By taking these measures operational and functional reliability is substantially improved.