| 摘要 |
<p>A circuit arrangement for a reversible electric motor supplied from a voltage source, which motor drives a combined window-lifter and door-locking installation in motor vehicles. The motor is switched on by way of a first operating switch developed as a reversing switch and by way of a second operating switch serving as a central switch. A position switch is assigned to the motor and is developed as a two-way switch which is operated by the motor. When the window is completely closed, the position switch may be changed over from a first switching position into a second switching position and after an unlocking operation, or before the window is opened, the position switch may again be changed over from the second switching position into the first one. During a locking operation the second input of the position switch is applied to a pole of the voltage source other than the pole used during the other adjusting operations.</p> |
