Safety switch with positive mounting retention and prolonged ope

Details Safety switch with positive mounting retention and prolonged ope Safety switch with positive mounting retention and prolonged ope

1990-04-26

1991-08-20

Cusick, Ernest G.

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200295, 200339, 200321, 200 43016, 200433, 200 4316, H01H 320, H01H 2700

Patent

active

050417061

ABSTRACT:
An electrical switch includes a rocker-type actuator adapted to be pivoted between first and second positions within a housing in order to close and open switch contacts. The actuator slidably supports a latch which normally engages the housing to prevent the actuator from being pivoted to its switch-closed position. By pulling on the latch and then lifting on the actuator, the actuator may be pivoted to its switch-closed position; the two-step operation protecting against accidental actuation of the switch. The switch housing is mounted with a snap fit in an opening iun a panel. A lug on the housing engages the underside of the panel to prevent the switch from being pulled out of the opening in the event a heavy lifting force is applied to the actuator without first releasing the latch. One switch contact is adapted to pivot and slide on a fulcrum which is laterally offset from the pivot axis of the actuator in order to delay opening of the switch relative to the position of the actuator.

REFERENCES:
patent: 1892542 (1932-12-01), Stearns
patent: 3158704 (1964-11-01), Sorenson
patent: 4170725 (1979-10-01), Farrell
patent: 4314121 (1982-02-01), Gabor
patent: 4777333 (1988-10-01), Valenzona
patent: 4778965 (1988-10-01), Valenzona
patent: 4870230 (1989-09-01), Osika et al.
patent: 4947009 (1990-08-01), Osika et al.

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