Electricity: circuit makers and breakers – Multiple circuit control – Reciprocating contact
Patent
1982-04-05
1983-11-29
Goldberg, Elliot A.
Electricity: circuit makers and breakers
Multiple circuit control
Reciprocating contact
200159R, 200291, 200276, 200340, H01H 1500
Patent
active
044182520
ABSTRACT:
A single or multiple pole key switch having a molded plastic housing formed with snap-in devices for mounting connection with a support and having a key stem reciprocatingly movable through one wall of the housing and having multiple guide surfaces thereon cooperating with corresponding surfaces of said housing for minimizing rotation, wobble and binding of the key stem in operation. The lower end of the key stem engages a return spring and is provided with at least one lateral cavity for carrying at least one contact spring for cooperation with stationary contacts mounted on a terminal block mounted in opposing adjacency thereto. A detent bar is provided on the terminal block to radially deflect the contact spring during key stem operation which provides the operator with "feel" of the switch action and produces an adjustable hysteresis or differential between the make and break of the contacts to avoid unwanted contact opening or closure and afford dampened make and break contact action. Contact reliability is promoted by unique wiping action of portions of the contact spring over the stationary contacts.
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Ginsburg Morris
Goldberg Elliot A.
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