Electric lock system

Details Electric lock system Electric lock system

1975-11-24

1977-10-11

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

292144, H01H 4700

Patent

active

040539393

ABSTRACT:
An electric lock system is disclosed comprising an electro-mechanical lock device including a pair of current terminals and a self-sustaining solenoid circuit, a control device including a pair of current terminals, at least one d.c. current source and means for changing the direction of the d.c. current. The electro-mechanical lock device is put in a locking condition and an unlocking condition according to the application of the d.c. current supplied thereto from the control device through the lead wires and these conditions are detected in the control device via the same lead wires.

REFERENCES:
patent: 2096935 (1937-10-01), Hitchcock
patent: 2321922 (1943-06-01), Leathers
patent: 3521921 (1970-07-01), Miyazaki
patent: 3837192 (1974-09-01), Arouete

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