FIELD: locking devices. SUBSTANCE: device for checking state of locking member has locking member, frame, collar, switches, contacts, switching device, three induction members, four electric circuits, electric lines, bridge system, two capacitors, two switches, and oscillator. EFFECT: higher efficiency. 5 cl, 8 dwg
Authors
Dates
1995-02-09—Published
1988-11-15—Filed