Closure fasteners – Operators with knobs or handles
Patent
1977-03-25
1978-07-11
Moore, Richard E.
Closure fasteners
Operators with knobs or handles
292207, 292358, E05C 310
Patent
active
040997561
ABSTRACT:
A latch assembly comprises a bolt unit mounted in a frame member of a door or window sash, and first and second bolt-driving units installed one on each side of the door or window sash. The bolt unit has a latch bolt supported by a rotatable hollow shaft, the bolt being pivotable between projecting and retracted positions by rotation of the hollow shaft. The first bolt-driving unit includes a first driver torque bar having one end spring-biased for insertion into the hollow shaft for driving engagement therewith. The first driver torque bar can be turned about its longitudinal axis by a handle. The second bolt-driving unit includes a second driver torque bar having one end spring-biased for withdrawal out of driving engagement with the hollow shaft. The second driver torque bar can be turned about its longitudinal axis by a knob. The handle is pivoted to actuate the latch bolt for normal latching and unlatching operation. When it is necessary to lock or unlock the door or sash from the other side thereof such as in case of emergency, then the knob is pushed to cause the second torque bar to enter the hollow shaft and displace the first torque bar out of the hollow shaft via a pin which is axially slidably disposed in the hollow shaft. The knob can be turned to actuate the latch bolt independently of the first bolt-driving unit.
REFERENCES:
patent: 1387888 (1921-08-01), Holt
patent: 2412789 (1946-12-01), Voight
patent: 3456974 (1969-07-01), Moore
Moore Richard E.
Yoshida Kogyo K.K.
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