Cable actuated switching mechanism with mechanical snap action c

Details Cable actuated switching mechanism with mechanical snap action c Cable actuated switching mechanism with mechanical snap action c

1995-12-20

1997-09-09

Spyrou, Cassandra C.

Electricity: circuit makers and breakers

Special application

Running length, web or strand actuated

200543, 200573, H01H 1700

Patent

active

056659474

ABSTRACT:
A cable switch actuating mechanism is provided with a shaft and a cam structure that slides on the shaft. When the associated cable is pulled to exert an axial force on the shaft, the cam actuator is pushed by the shaft into a deactuating position that moves a switch operator plunger against a plunger of an associated electrical switch. If the cable breaks, the reduction enforced on the shaft causes an internal spring to move the shaft against the cam structure and, as a result, move the switch operator into its deactuating position. Appropriate gaps between the opposite ends of the cam structure and associated surfaces of the shaft allow for thermal expansion and contraction of the cable without adverse affects on the mechanism.

REFERENCES:
patent: 3870846 (1975-03-01), Filip
patent: 3956606 (1976-05-01), Reiter
patent: 4306126 (1981-12-01), Howard
patent: 4396815 (1983-08-01), Kobayashi et al.
patent: 4458122 (1984-07-01), Knight
patent: 5003135 (1991-03-01), Piccoli
patent: 5041705 (1991-08-01), Piccoli

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