Locks – Special application – For closures
Patent
1974-05-07
1976-04-06
Gilliam, Paul R.
Locks
Special application
For closures
70134, 70391, 70DIG42, 292139, 292165, 292167, 292DIG62, E05B 6308, E05B 6316, E05B 6506, E05C 106
Patent
active
039480666
ABSTRACT:
A door lock having two escutcheon plates clamped against the sides of a door, two mortise cylinders mounted in coaxial relation in the escutcheon plates and each having a rotatable key plug and an actuating arm on the inner end of the plug, a bolt slidable between extended and retracted positions, and a toggle joint bolt-operating mechanism actuated by the actuating arms on the key plugs. This mechanism includes a bolt link pivotally connected to the inner end of the bolt, and an actuating link between the ends of the key plugs having abutment means for coupling and uncoupling of the arms and the actuating link which is urged in toward the locked and unlocked positions by a toggle spring movable into oppositely over-center positions. The abutment means comprise two spaced tabs defining a slot into which the actuating arm is eccentrically extended and retracted during rotation of the key plug through full locking and unlocking revolutions.
REFERENCES:
patent: 1518395 (1924-12-01), Dexter
patent: 1702211 (1929-02-01), Jakopec et al.
patent: 1782776 (1930-11-01), Dowling
patent: 1876803 (1932-09-01), VonMehren
patent: 2163121 (1939-06-01), Holtzman
patent: 2296020 (1942-09-01), Carter
patent: 2623379 (1952-12-01), Lucius
patent: 2842951 (1958-07-01), Duvall
patent: 2969666 (1961-01-01), Muessel
patent: 2991643 (1961-07-01), Hitt
patent: 3768285 (1973-10-01), Schwartz
Gilliam Paul R.
Pietruszka Carl F.
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