Pressure sensing switch with conductive deflectable diaphragm

Details Pressure sensing switch with conductive deflectable diaphragm Pressure sensing switch with conductive deflectable diaphragm

1978-12-21

1980-07-08

Tolin, Gerald P.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200 83N, 340 58, 200 6125, H01H 3534

Patent

active

042119014

ABSTRACT:
A pressure sensing switch for transducing the change of pneumatic pressure to an electrical signal comprises a diaphragm made of a material having a Young's modulus E of 1.0.times.10.sup.4 -2.1.times.10.sup.4 kg/mm.sup.2, a Poisson's ratio V of 0.3, a thickness t of 0.02-0.2mm, a diameter d measured at a radially inner edge of a side wall portion being 5-10mm, a ratio of a radius or curvature R measured at a deflectable portion to a diameter d measured at the radially inner edge of the side wall portion being 2.5-5, and a maximum deflection Dmax of the deflectable area being ##EQU1##

REFERENCES:
patent: 3743801 (1973-07-01), Brobeck
patent: 4006083 (1977-02-01), Westervelt

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