Adjustment mechanism for pressure switch

Details Adjustment mechanism for pressure switch Adjustment mechanism for pressure switch

1994-06-20

1995-02-28

Pellinen, A. D.

Electricity: circuit makers and breakers

Fluid pressure

Flow-responsive type

200 83WM, 200 83SA, H01H 3524

Patent

active

053939450

ABSTRACT:
A sliding type adjustment mechanism for changing settings of a diaphragm type pressure switch adjusted by moving an external lever to move a plunger for changing the preload on the diaphragm. An external metal mounting bracket has a pair of spaced parallel slots which serve as ways. A plastic slider with a cam surface engaging the lever has a pair of lugs, each of which engages one of the slots for guiding the slider on the bracket. The slider has an integrally formed spring tab providing friction against the bracket to hold the slider in a selected position. A recess in the bracket relieves the tab friction at the limit of the slider travel to allow the lever to bias a steep-ramp portion of the cam surface to move the slider to an initial position.

REFERENCES:
patent: 4263489 (1981-04-01), Bergeson
patent: 4617432 (1986-10-01), Hanssen et al.
patent: 4629837 (1986-12-01), Carr

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