Key actuated security entry system

Details Key actuated security entry system Key actuated security entry system

1978-03-17

1980-07-22

Dorner, Kenneth

Locks

Special application

For closures

70421, 292DIG15, E05B 6500

Patent

active

042133157

ABSTRACT:
A key-actuated security entry system for an inwardly opening door to prevent unauthorized opening of the door. The system includes a pivotal, floor-engaging doorstop mounted on the door inside surface near its base, a key-actuated tumbler lock mounted through the door, preferably below the doorknob handle, the lock including a rotatable shaft protruding from the inside lock housing surface, and a cable connected to the shaft and the pivotal doorstop. The shaft includes a rachet lock requiring a proper key to disengage the shaft from the lock housing to permit shaft rotation by the key. Shaft rotation lifts the doorstop permitting entry through the doorway.

REFERENCES:
patent: 963527 (1910-07-01), Dessauer et al.
patent: 3670540 (1972-06-01), Fernandez
patent: 4068510 (1978-01-01), Neary

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