Limit switch

Details Limit switch Limit switch

1991-10-30

1993-05-04

Cusick, Ernest G.

Electricity: circuit makers and breakers

Limit switch

200573, 74107, 74569, H01H 316

Patent

active

052073165

ABSTRACT:
A limit switch is disclosed which comprises an operating lever, a rotary shaft which is driven by the operating lever, a first cam and a second cam as mounted on the rotary shaft for transformation of rotary motion into linear motion, a return spring for applying a returning force to the operating lever through the rotary shaft, a plunger operatively associated with the cams for turning a basic switch ON or OFF and a plunger holder for holding the plunger axially movable but not rotatable. The plunger having a plurality of integral projections corresponding to cam projections of the respective cams and disposed between the cams. The plunger is rotatable about its axis through the plunger holder to switch the ON-OFF mode of the basic switch.

REFERENCES:
patent: 3512422 (1970-05-01), Aslan
patent: 3740504 (1973-06-01), Hipple
patent: 3749860 (1973-07-01), Crepeau
patent: 3931484 (1976-01-01), Chace et al.
patent: 3959614 (1976-05-01), Graninger
patent: 4406933 (1983-09-01), Boozer
patent: 4847453 (1989-07-01), Newell et al.

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