Pressure-sensitive element

Details Pressure-sensitive element Pressure-sensitive element

1983-08-29

1985-06-18

Tolin, G. P.

Electricity: circuit makers and breakers

Weight

Treads

200 85R, 200159B, H01H 3500

Patent

active

045242569

ABSTRACT:
A pressure-sensitive element for use in a keyboard switch etc., comprising a conductive porous material which is rugged, an elastic insulator which bulges more than convex parts of the conductive porous material without covering the convex parts, and a conductive layer which opposes to the conductive porous material through the elastic insulator. When no pressure is applied, openings are formed between the convex parts of the conductive porous material and the conductive layer through the elastic insulator, whereby the pressure-sensitive element is in its nonconductive state. When a pressure is applied, the elastic insulator is deformed to bring the convex part of the conductive porous material into contact with the conductive layer, whereby the pressure-sensitive element is brought into its conductive state.

REFERENCES:
patent: Re28365 (1975-03-01), Brave
patent: 3668337 (1972-06-01), Sinclair
patent: 3920940 (1975-11-01), Brown et al.
patent: 4296406 (1981-10-01), Pearson
patent: 4317012 (1982-02-01), Itoh

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