Electronic locking apparatus

Details Electronic locking apparatus Electronic locking apparatus

1987-03-27

1988-05-03

Gellner, Michael L.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

361172, 34082531, H01H 4700

Patent

active

047424265

ABSTRACT:
A battery powered electronic lock includes a control for indicating low battery voltage and reserving a portion of the battery's energy for operating the lock upon insertion of maintenance or emergency keys.

REFERENCES:
patent: 4495540 (1985-01-01), Remington et al.
patent: 4499462 (1985-02-01), Stoesser et al.

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