SELF-SWITCHING ELECTROMAGNETIC ACTUATOR Russian patent published in 1997 - IPC

FIELD: actuating valves, gear mechanisms, shut-off devices, as well as electromagnetic switching devices and miscellaneous continuously running devices including those using off-line power supply. SUBSTANCE: traction electromagnet coils and those of latch electromagnet are connected to power circuit through actuator limit switches one of which is mechanically coupled with traction motor armature and other one, with latch; gate electrodes of thyristors are series-connected to electromagnet coils and through same switches, to actuator control lead. Capacitor connected through one of its leads to actuator manual control lead and through its other lead to common wire, functions to supply control pulse to gate electrodes of thyristors. EFFECT: enlarged functional capabilities. 2 dwg