Abstract: The invention relates to a rotation angle measuring device for an electrical machine. To provide a simple and compact measuring device of this kind, the invention provides for the commutator of the machine to be magnetized and for the magnetic field which rotates with the commutator to be evaluated by means of a suitable sensor. Advantageous improvements relate to a suitable structure for the commutator.

Abstract: A metal heat dissipation element is made an integral part of a metal houses of a motor, then a bearing plate of plastic material is injection-molded onto the housing. Preferred embodiments relate to the increased strength of the housing for which purpose additional plastic components in the form of webs are produced in the injection-molding operation.

Abstract: A pluggable adapter for connecting a miniature electric motor, especially of a central locking device of an automotive vehicle, with the end pieces of conductor tracks and to accommodate the motor in the housing. Soldering is no longer necessary and there aren't any disturbing cables.

Abstract: The invention relates to an electromotive actuator with a housing for a central door locking system of a motor vehicle having a first slide adjustable by a first electric motor between two end positions. The first slide can be connected with a door lock of the motor vehicle independently of the end position and is preferably decoupled from the electric motor in the end positions, so that the first slide is manually adjustable between its end positions. Such an electromotive actuator is provided with a theft protection capability in the sense that, after a windshield of a motor vehicle is smashed in, an unlocking of the door by the inside locking handle is no more possible because the parts of the actuator are not actuated by operating the inside locking handle. Finally, an unlocking operation initiated from the outside is possible when the theft protection is put into operation.

Abstract: An electric motor, in particular a wiper motor for driving a windshield wiper system in a motor vehicle, which comprises a gear housing including a cover and several plug contacts, of which some are fixed on the gear housing, in particular on the cover, and at least another is connected with a motor current supply lead and fitted in a plug housing. In order to provide good protection of the plug contacts and the gear housing interior against dirt, the plug housing has an opening with a circumferential rim, through which the plug contacts fixed on the gear housing enter the plug housing. Furthermore the plug housing rests firmly against the gear housing around the opening.

Abstract: For easily assembling an electric motor a locking lug is formed onto the brush support plate. In an assembly position the ratchet lug of said locking lug engages a cavity of the brush and keeps it at a distance from the commutator so that the commutator can easily be installed between the brushes. In order to release the arrest of the brushes during the assembly a releasing part of the locking lug projects into a recess in the housing cover. This arrangement is easy to manufacture and reduced the number of assembly steps.In a second embodiment the releasing part of the locking lug lies above the front side of the housing cover and projects into a recess in the housing cover lid.