Closure fasteners – Bolts – Swinging
Patent
1985-05-23
1987-05-12
Wolfe, Robert L.
Closure fasteners
Bolts
Swinging
292DIG66, 292DIG69, E05C 0306
Patent
active
046644296
ABSTRACT:
Delayed release locking control device, particularly for doors of washing machines and the like, containing inside a case a self-regulating resistive wafer heater of a material having a positive temperature coefficient (PTC) of resistance, a snap-acting bimetallic element connected to a latch or locking member, and terminals which carry electrical current to the PTC wafer heater, wherein the bimetallic element is arranged so means transform the linear snap like movement of an end of the bimetallic element into a rotary movement of the latch mounted on the case to cause it to rotate 90.degree. from a resting position into an operating position when the bimetallic element, selectively heated by the said PTC wafer, abruptly reverses its curvature upon reaching the actuating temperature of reversal and to cause the said latch to return to the resting position when the bimetallic element cools down again to below a reset temperature of reversal and snaps back to its normal curvature.
REFERENCES:
patent: 3815942 (1974-06-01), White
patent: 3884056 (1975-05-01), East et al.
patent: 4032180 (1977-06-01), Pohl
patent: 4074545 (1978-02-01), Case
patent: 4286811 (1981-09-01), Schantz
Attena Giancarlo
Notaro Giuseppe
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
Wolfe Robert L.
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