Door lock mechanism

Details Door lock mechanism Door lock mechanism

1974-10-29

1976-01-20

Gilliam, Paul R.

Locks

Special application

For closures

70388, 292165, E05C 112, E05B 1700, E05B 5500

Patent

active

039330168

ABSTRACT:
A handle set door lock comprised of an outer assembly with a handle, a thumb piece actuator, a key operated cylinder, a latch bolt and operating mechanism, and a selective control member is disclosed. When the selective control member is in a first position, depression of the thumb piece actuator engages the operating mechanism causing the retraction of the latch bolt. When the selective control member is in a second position, the thumb piece actuator is disengaged from the operating mechanism permitting depression of the thumb piece actuator but without causing retraction of the latch bolt. The latch bolt can always be retracted by the conventional key operated cylinder located on the outer assembly when the selective control member located on the inner knob is in either the first or second position. In addition, a unique gear driven key operated assembly provides improved mechanical advantages, and combined with the above described latch bolt retraction means, provide a simple and more compact mechanism not requiring extra openings in the door for mechanism clearance.

REFERENCES:
patent: 2724258 (1955-11-01), McConnell
patent: 2916903 (1959-12-01), Squire
patent: 3430469 (1969-03-01), Baxter et al.
patent: 3808849 (1974-05-01), Alexander

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