Electronic code controlled deadbolt

Details Electronic code controlled deadbolt Electronic code controlled deadbolt

1984-02-21

1986-02-04

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

70278, 34082531, H01H 4732

Patent

active

045689989

ABSTRACT:
An electronic lock system for power positioning of a deadbolt, responsive to passive code combinations of tone frequencies imposed upon a radio frequency carrier wave, the code combinations being encoded and decoded with direct activation of switching to control operation of a motor drive for closed and opened positioning of said deadbolt.

REFERENCES:
patent: 3733861 (1973-05-01), Lester
patent: 3854310 (1974-12-01), Paull et al.
patent: 4083424 (1978-04-01), Von Den Stemmen et al.
patent: 4317157 (1982-02-01), Eckloff
patent: 4366466 (1982-12-01), Lutz
patent: 4509093 (1985-04-01), Stellberger

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