H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/299
H01H 3/42 (2006.01) H01H 1/18 (2006.01) H01H 13/18 (2006.01) H01H 1/20 (2006.01)
Patent
CA 1329409
ABSTRACT OF THE DISCLOSURE A switch assembly for a geared limit switch for valve actua- tors is formed from aligned switch modules. The switch modules includes a pair of switch units, each switch unit having a plunger and a movable contact plate mounted between two springs. As the plunger is driven inward, a camming element on the plunger contacts an edge of an aperture in the movable contact plate, forcing the plate to move in a direction perpendicular to the line of plunger travel. The inward motion of the plunger and the camming action continue after the contacts have closed, wiping the contacts mounted on the movable plate across the surfaces of the stationary contacts. When the plunger is released, an outer edge of the movable plate engages a beveled inner wall of the switch unit housing, returning the movable contact plate to its original position.
588658
Auxier Robert W.
Wilkinson Ivan E.
Limitorque Corporation
Shapiro Cohen
LandOfFree
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