Pressure switch with calibration tab

Details Pressure switch with calibration tab Pressure switch with calibration tab

1987-10-28

1988-07-05

Tolin, G. P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83WM, 200 83SA, 74511R, 4034071, 337319, H01K 3534

Patent

active

047556390

ABSTRACT:
The present invention pertains particularly to low pressure level type switches employed for sensing the water level in washing appliances. The invention employs a slidable strip or tab interposed between the diaphram pre-load spring and the reaction stop for the spring. In one position the thickness of the movable tab increases the pre-load on the spring by an amount equal to the thickness of the tab. In a secod position the pre-load stop extends through a cutout in the tab and contacts the spring reaction member directly.

REFERENCES:
patent: 3596023 (1971-07-01), Kothe
patent: 3600539 (1971-08-01), Walker
patent: 3845265 (1974-10-01), Kothe
patent: 3846600 (1974-11-01), Kolze
patent: 4428596 (1984-01-01), Bell
patent: 4617432 (1986-10-01), Hanssen et al.
patent: 4645228 (1987-02-01), Bertonneau

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