Pressure switch

Details Pressure switch Pressure switch

1983-11-14

1985-06-18

Scott, J. R.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83W, 200306, H01H 3540, H01H 902

Patent

active

045242542

ABSTRACT:
A pressure switch including a diaphragm displaceable under pressure and a switch chamber containing a switch element responsive to the displacement of the diaphragm, the switch chamber further including a vent hole formed therein for communicating said switch chamber with the surrounding atmosphere, the vent hole being closed at one end by a porous filter having air permeability and water repellency, the filter extending outwardly from the surrounding walls of a holder.

REFERENCES:
patent: 2685650 (1954-08-01), Collins et al.
patent: 2698887 (1955-01-01), Shaw
patent: 2945430 (1960-07-01), Slick
patent: 3090848 (1963-05-01), Scholz
patent: 3898421 (1975-08-01), Suzumura

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