Constant load snap switch with manual or automatic reset,...

Details Constant load snap switch with manual or automatic reset,... Constant load snap switch with manual or automatic reset,...

H - Electricity

01

H

306/328

H01H 5/18 (2006.01)

Patent

CA 1223023

-22- Abstract of the Disclosure A constant load and constant contact force snap-action switch having a normally-closed movable operate contact on a flipper blade which has a compression strip that snaps through an S-curvature to a reverse buckled state to trip the operate contact open. The flipper blade is coupled through an insulating cap to the leaf spring mounted movable alarm contact to close the latter at the same time. A return spring biased reset lever resets the operate contacts on depression down a first amount, opens the operate contact without closing the alarm contacts on depression down a second amount for stop purposes, and trips the operate contacts open on lifting upwards for test purposes. On reset, lost motion in the coupling cap knocks the alarm contact open if welded. A selector is wettable to select any of three functions for the reset lever, (1) reset-stop-test, (2) auto reset stop, or (3) reset test.

444017

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