Limit switch with actuator

Details Limit switch with actuator Limit switch with actuator

1987-11-03

1989-07-11

Luebke, Renee S.

Electricity: circuit makers and breakers

Limit switch

H01H 316

Patent

active

048474533

ABSTRACT:
A limit switch includes a housing which encloses a snap switch having first and second pairs of spaced fixed contacts and first and second movable contacts supported on a carrier and operated by first and second reciprocating plungers that are biased to a first position. Toggle springs are interposed between the respective plungers and the carrier to move the carrier and the associated contacts between fixed pairs of fixed contacts during reciprocation of the respective plungers. An actuator head is mounted on the switch housing and has cams for actuating the respective plungers. In one preferred embodiment, the actuator head has a pair of concentric actuator elements that are respectively moved by first and second cams mounted on a shaft and configured so that rotation of the shaft in one direction will actuate one plunger, while rotation of the shaft in the opposite direction will operate the second plunger, thereby producing a neutral position for the limit switch in either direction of movement of the actuating shaft.

REFERENCES:
patent: 3275764 (1966-09-01), Kiessling et al.
patent: 3317687 (1967-05-01), Dehn
patent: 3370138 (1968-02-01), Vinot
patent: 3539738 (1970-11-01), Bowen et al.
patent: 3649785 (1972-03-01), Dietrich
patent: 3721782 (1973-03-01), Roumagnac
patent: 3882290 (1975-05-01), Duncan
patent: 4381437 (1983-04-01), Geremia
patent: 4406933 (1983-09-01), Boozer
patent: 4510355 (1985-04-01), Atsumi et al.

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