Membrane switch with means for impeding silver migration

Details Membrane switch with means for impeding silver migration Membrane switch with means for impeding silver migration

1979-04-16

1981-01-06

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200267, H01H 1370

Patent

active

042438527

ABSTRACT:
A membrane switch has a first silver conductor formed on a flexible membrane and a second silver conductor formed on a substrate, which may also be a flexible membrane. A spacer is positioned between and adhesively secured to the substrate and membrane in such a way that there is an opening in the spacer in register with the first and second conductors. Pressure applied to the membrane moves it toward the substrate through the opening in the spacer to cause electrical contact between the first and second conductors. There are means for impeding migration of the silver between the first and second conductors which essentially consists of orienting the conductors so as to provide the longest possible path between portions thereof.

REFERENCES:
patent: 3705276 (1972-12-01), Seeger, Jr. et al.
patent: 4035593 (1977-07-01), Riniker
patent: 4065649 (1977-12-01), Carter et al.
patent: 4143253 (1979-03-01), Wagner et al.

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