Lock knob control mechanism

Details Lock knob control mechanism Lock knob control mechanism

1975-10-24

1976-12-28

Foss, J. Franklin

Locks

Special application

For closures

292 34, 292165, E05B 5500

Patent

active

039994112

ABSTRACT:
Lock knob control mechanism comprising a three-piece cam assembly made up of a central cam actuator and two outside knob guides that may be selectively assembled to make the two knobs at opposite sides of a door active or inactive. An inactive knob guide makes its knob nonrotatable. An active knob guide cooperates with the central cam actuator and a locking pawl that prevents rotation of its knob but may be rendered inoperative electrically from a remote point by authorized personnel or mechanically in response to actuation of the key for that lock. The knob control also includes a retainer for securing a knob in place on the door which can be released only when the door is open, with a rose for the knob secured to the door by screws that are covered by the knob so that with the door closed there are no visible means for removing the knob.

REFERENCES:
patent: 862230 (1907-08-01), Young
patent: 864819 (1907-09-01), Young
patent: 1569228 (1926-01-01), Hurd
patent: 2032765 (1936-03-01), Rolph
patent: 2800347 (1957-07-01), Wardinell

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