Electromagnetic D.C. relay with armature contact system - has excitation cct. of coil, yoke, and armature and magnetic flux switching

摘要

The excitation circuit consists of a coil, a yoke, and an armature which actuates a contact system. The direction of the magnetic plugs can be electrically reversed. In the movement range of the armature is mounted a permanent magnetic locking lever which latches the relay in its operating position owing to the magnetic attraction, when the relay receives an attraction pulse. On receiving an oppositely polarised release pulse the locking lever is delatched owing to magnetic repulsion. Preferably the locking lever is mounted at on end and is of L-shape, its protruding free end reaching beyond the attracted armature. The longitudinal part of the locking lever may be formed by a plastics rod whose free end may carry a small rod-shaped magnet.