Membrane switch

Details Membrane switch Membrane switch

1991-04-05

1992-07-21

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200512, 200288, H01H 1370

Patent

active

051324962

ABSTRACT:
A membrane switch comprises an upper flexible layers, separation layer and a lower conductive layer mounted on a support. The membrane switch is designed to absorb the noise created when a key is depressed and an operating block collides with the layers directly beneath it. By creating several holes in the one or more of the lower layers of the membrane switch, and optionally the support that geometrically surrounds the aperture of the separation layer, the colliding force of the operating block on the laminated membrane switch is dispersed and much of the noise is absorbed.

REFERENCES:
patent: 3617660 (1971-11-01), Krakinowski
patent: 3777222 (1973-12-01), Harris
patent: 4046975 (1977-09-01), Seeger, Jr.
patent: 4349712 (1982-09-01), Michalski
patent: 4375585 (1983-03-01), Lee
patent: 4485279 (1984-11-01), Nakamura
patent: 4503294 (1985-03-01), Matsumaru
patent: 4528431 (1985-07-01), Coleman, III
patent: 4580018 (1986-04-01), Yoshihara
patent: 4596905 (1986-06-01), Fowler
patent: 5567798 (1984-06-01), Iwai et al.

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