Quick opening lock assembly for doors and method

Details Quick opening lock assembly for doors and method Quick opening lock assembly for doors and method

1977-07-29

1978-07-18

Holko, Thomas J.

Closure fasteners

Bolts

Emergency operating means

70 92, 292165, 292185, 2923363, E05C 1502, E05C 114

Patent

active

041011538

ABSTRACT:
A lock assembly is mounted on a door for opening the same upon depression of a handle pivotally mounted thereon. A spiralled cam is formed on a tubular adapter, detachably mounted on a rotary spindle of a lock assembly to replace a door knob. The handle engages the cam for retracting a latch normally extended into a striker plate for holding the door in a locked position on a door jamb, upon pivoting of the handle.

REFERENCES:
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patent: 1621174 (1927-03-01), Schlage
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patent: 2883183 (1959-04-01), Finsternwalder et al.
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patent: 3009347 (1961-11-01), George
patent: 3128115 (1964-04-01), Patriquin et al.
patent: 3177024 (1965-04-01), Krook et al.
patent: 3374684 (1968-03-01), Greven
patent: 3458225 (1969-07-01), Brothers et al.
patent: 3731962 (1973-05-01), Enochian
patent: 3865414 (1975-02-01), Schlage
patent: 3869159 (1975-04-01), Eads

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