Rotary centrifugally-operated electrical switch for motors

Abstract From the Canadian patent

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 …