Pushbutton combination lock

Details Pushbutton combination lock Pushbutton combination lock

1975-12-18

1977-04-26

Frazier, Roy D.

Locks

Operating mechanism

Using a powered device

70133, 70220, 70276, 70279, 361172, E05B 4902

Patent

active

040193551

ABSTRACT:
This invention relates to electrical combination locks that compare a sequence of input signals with a stored sequence to permit the lock to be opened. The mechanical features of the lock are characterized by an arm and control member within the lock structure that inhibit bolt motion in the absence of the proper combination. The electrical circuit enables the combination to be changed readily and uses very little power.

REFERENCES:
patent: 2544330 (1951-03-01), Koenig
patent: 3475932 (1969-11-01), Germanton
patent: 3656327 (1972-04-01), Ford et al.
patent: 3704607 (1972-12-01), Germanton
patent: 3777519 (1973-12-01), Germanton

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