Membrane switch with universal spacer means

Details Membrane switch with universal spacer means Membrane switch with universal spacer means

1980-04-09

1982-02-23

Truhe, J. V.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

29622, 200159B, H01H 900

Patent

active

043170137

ABSTRACT:
A method and apparatus for forming a membrane switch of the type having a flexible membrane, a substrate, first and second conductors formed on the membrane and substrate and spacing means disposed between the first and second conductors. The spacing means is applied to either the membrane or substrate in a uniform pattern of individual spacer areas. The spacer areas are applied in liquid form which is cured or allowed to dry. The pattern of spacer areas can be applied without regard to the location of the conductors. The size, spacing and thickness of the spacer areas allow contact between aligned first and second conductors when the exterior of the membrane is subjected to pressure. Thus the same pattern of spacer areas can be used with any arrangement of conductors.

REFERENCES:
patent: 3699294 (1972-10-01), Sudduth
patent: 4017697 (1977-04-01), Larson
patent: 4066854 (1978-01-01), Zenk et al.
patent: 4145584 (1979-03-01), Otterlei

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