Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1982-12-13
1984-08-21
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200 86R, 200159B, H01H 1370
Patent
active
044671512
ABSTRACT:
An electrical switch comprising a touch panel includes a flexible membrane having a series of parallel, electrically conductive strips formed thereon; and an opposed substrate layer having conductive strips thereon parallel and orthogonal to the membrane strips. A series of filament spacers, running parallel to the substrate layer strips, are positioned between the membrane and substrate layer to maintain the membrane strips and substrate strips in spaced-apart relation to each other. The filament spacers are secured to an associated boundary or frame. Finger or instrument pressure selectively applied to the membrane and directed toward the substrate, can establish contact between a chosen membrane strip and substrate strip to close the switch. The elastic deformation of the filament spacers enhances contact closure and contact life expectancy. The presence of insulative dust, which interferes with the current flow between the contacts, is eliminated.
REFERENCES:
patent: 3617666 (1971-11-01), Braue
patent: 3668337 (1972-06-01), Sinclair
patent: 4085302 (1978-04-01), Zenk et al.
Bonnie G. Patrick
Johnson Robert J.
Miller Charles N.
Control Data Corporation
Genovese J. A.
Niebuhr F. W.
Scott J. R.
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