Delay action electronic timer lock with automatic cancellation c

Details Delay action electronic timer lock with automatic cancellation c Delay action electronic timer lock with automatic cancellation c

1990-06-04

1990-12-18

Wolfe, Robert L.

Locks

Operating mechanism

Predetermined time interval controlled

70271, E05B 4300

Patent

active

049777653

ABSTRACT:
A delay action time lock having a lock housing in which a spring action bolt is movably connected. A retracting cam is provided for engagement with a bolt retracting lever for retracting a locking end of the bolt in the housing by means of a key inserted in a key cylinder and after an electronic timer has initiated a first preset time delay count. A motor actuated support cam is provided for normally supporting the retracting lever in a disengaged position with the retracting cam. After the preset time delay count, the bolt retracting lever is liberated to be engaged by the retracting cam. After a second preset time delay or upon the actuation of a microwswitch by the retracting lever, the motor actuated support cam is placed to support the retracting lever at its disengaged position so that as soon as the key cylinder is turned back to its initial position, the lock bolt is disengaged.

REFERENCES:
patent: 3391556 (1968-07-01), Schell
patent: 3670538 (1972-06-01), Curry
patent: 3823586 (1974-07-01), Melancon
patent: 4106316 (1978-08-01), Tippin
patent: 4328689 (1982-05-01), Keller
patent: 4843850 (1989-07-01), McGregor

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