Door lock apparatus

Details Door lock apparatus Door lock apparatus

1976-11-18

1979-01-02

McCall, James T.

Closure fasteners

Bolts

Sliding

70279, E05B 4700

Patent

active

041324390

ABSTRACT:
Door locking apparatus including electrically operated lock mounted in door surround structure and electrically operable to thrust lock bolt into recess in door. Door carries lock over-ride mechanism manually operable from one side of the door to push lock bolt from recess in event of power failure to allow emergency exit. Over-ride mechanism may be interconnected with conventional latch mechanism on door such that latch is operable from both sides of doors to control entry and exit when electrically operated lock is switched off during periods when security not necessary.

REFERENCES:
patent: 450068 (1891-04-01), Grefen
patent: 2223050 (1940-11-01), Scragg
patent: 2765648 (1956-10-01), Hatcher
patent: 2786701 (1957-03-01), Povlick
patent: 2828151 (1958-03-01), Brotman et al.
patent: 3750433 (1973-08-01), Sanders
patent: 3751088 (1973-08-01), Schlage
patent: 3765709 (1973-10-01), Wyck
patent: 3869159 (1975-03-01), Eads
patent: 3872696 (1975-03-01), Geringer

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