Environmentally protected switch for dynamoelectric machines

Details Environmentally protected switch for dynamoelectric machines Environmentally protected switch for dynamoelectric machines

1989-03-13

1990-05-01

Tolin, Gerald P.

Electricity: circuit makers and breakers

Centrifugal

Liquid contact

73535, 2003021, 310 68E, H01H 3510

Patent

active

049220667

ABSTRACT:
A switch assembly for use with a centrifugal actuator in the start winding circuit of a dynamoelectric machine (1). The switch has a pair of electrical contacts (29, 33) contained in a pliable, bellows-like enclosure (37) for protection from foreign matter. The assembly includes a terminal board (19) having an electrically conductive post (28) mounted thereon and comprising one side of the switch. A second contact, comprising the other side of the switch, is directly above the first and is surrounded by an electrically conductive cap (32). The cap is affixed between the ends of an electrically conductive, cantilevered switch arm (16) which is biased against a vertically rigid, horizontally adjustable stop (45). The stop has one end rigidly mounted to the terminal board and its other end above and in contact with the switch arm where the cap is affixed to the arm. The bias is caused by the switch arm support structure at the fixed end being attached to the terminal board at an angle. Moving the end of the stop contacting the arm toward the support structure, decreases the gap between the switch contacts, while moving the end of the stop towards the free end of the switch arm increases the gap.

REFERENCES:
patent: 2747854 (1956-05-01), Schnepf
patent: 3433908 (1969-03-01), Cunningham
patent: 3950628 (1976-04-01), Hruda
patent: 4289988 (1981-09-01), Schaefer
patent: 4414443 (1983-11-01), Gehrt
patent: 4633213 (1986-12-01), Venema

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