Tamper resistant locking device

Details Tamper resistant locking device Tamper resistant locking device

1990-01-30

1991-12-10

Smith, Gary L.

Locks

Operating mechanism

Combination

292DIG63, 292DIG65, E05B 3720

Patent

active

050707140

ABSTRACT:
A tamper resistant lock construction for a door, drawer, or similar closure is disclosed. A lock bolt releasably locks the closure. A plurality of finger openings are provided, each finger opening adapted to receive a finger. At least one actuator in each finger opening is positioned to be selectively operated by a finger inserted into the finger opening. The lock bolt is released only in response to the actuation of a preselected combination of the actuators.

REFERENCES:
patent: 840054 (1907-01-01), Farrand
patent: 1567135 (1925-12-01), Gregory
patent: 2484597 (1949-10-01), Wegele
patent: 2936189 (1960-05-01), Pearson
patent: 2972879 (1961-02-01), Fry
patent: 3109900 (1963-11-01), Van Hook
patent: 3160431 (1964-12-01), Anderson et al.
patent: 3631444 (1968-07-01), Daniel
patent: 3772574 (1973-11-01), Hughes
patent: 3893721 (1975-07-01), Upton
patent: 3999792 (1976-12-01), Smith
patent: 4198084 (1980-04-01), Trotta
patent: 4660394 (1987-04-01), Wu
patent: 4714030 (1987-12-01), Cole

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