Rotary centrifugally-operated electrical switch for motors

Electricity: circuit makers and breakers – Centrifugal – Liquid contact

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318325, H01H 3510

Patent

active

039506266

ABSTRACT:
A speed-responsive electrical switch assembly consisting of a centrifugally-actuated switch operating unit customarily mounted on a rotatable shaft and having orbitally movable weights engageable with the surface presented by a switch unit to cause make and break operation of the electrical switch contacts. The radial centrifugally-induced inboard and outboard movement of the weights themselves in engagement with the surface of the switch unit, preferably an angularly inclined cam surface, serves to modulate the axial or longitudinal switch-operating, spring-induced displacement of the weights toward or away from the electrical switch unit and thus permits greater latitude in manufacturing and assembly tolerances and with improved switch operating characteristics while still maintaining prior art standards of precision switch control and uniformity of switch action.

REFERENCES:
patent: 2414470 (1947-01-01), Juhasz
patent: 2611602 (1952-09-01), Rosebraugh
patent: 2616682 (1952-11-01), Greenhut
patent: 2768260 (1956-10-01), Greenhut
patent: 3793891 (1974-02-01), Greenhut

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