Commutated electro-dynamic machine such as a d.c. motor, having an auto-synchronizing sensor, and a screen wiping apparatus employing such a motor

摘要

In a screen wiping apparatus for a vehicle, two or more motorsz of the kind having a commutator, such as d.c. wiper motors, are automatically synchronised by a synchronising means which comprises a wheel coupled to the commutator of each machine, together with a reading device which is coupled to the stator of the machine. The reading device detects the instantaneous angular position of the machine.