Pivoted-actuator switch with integral off-lock

Details Pivoted-actuator switch with integral off-lock Pivoted-actuator switch with integral off-lock

1978-10-26

1979-11-13

Stephan, Steven L.

Electricity: circuit makers and breakers

Special application

Liquid or moisture responsive

200 42T, 200322, 200325, H01H 9320, H01H 2180, H01H 922

Patent

active

041744721

ABSTRACT:
A pivoted-actuator switch having a switch operator including a pivotally-mounted contact actuator and a manually-grasped, removable operating lever or "key" snap-in mounted to the contact actuator for actuating the switch. A spring-biased pivotal lock bar is normally retracted by the operating lever into the contact actuator so as to clear the rim of the hole in the switch housing through which the contact actuator extends. When the operating lever is removed, the spring pivots the lock bar to extend out from the contactor actuator and to catch on the rim of the hole thereby to prevent operation of the switch from off to on position. When the switch is on, it can nevertheless be turned off because this lock bar is shaped for one-way cam-in past the rim and then to pivot out again to abut the top of the rim. The operating lever has a projecting finger effective when inserted into the contact actuator to pivot the lock bar inwardly to clear the housing rim and thus to allow normal switch operation. The housing may be shaped to make the lock bar inaccessible for unlocking from the outside.

REFERENCES:
patent: 3598162 (1971-08-01), Rosenthal
patent: 3626118 (1971-12-01), Botefuht
patent: 3906176 (1975-09-01), Carlson
patent: 4013858 (1977-03-01), Grebner et al.
patent: 4121065 (1978-10-01), Woodard

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