Tactile membrane keyboard with asymmetrical tactile key elements

Details Tactile membrane keyboard with asymmetrical tactile key elements Tactile membrane keyboard with asymmetrical tactile key elements

1984-02-13

1985-01-08

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200329, H01H 1370

Patent

active

044928297

ABSTRACT:
A tactile or snap action membrane keyboard is presented wherein the tactile or snap action key elements are protrusions in a membrane sheet, the protrusions being asymmetrical to preprogram the collapse of the tactile element.

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patent: 4127752 (1978-11-01), Lowthorp
patent: 4129758 (1978-12-01), Gilano et al.
patent: 4156802 (1979-05-01), Gilano et al.
patent: 4314116 (1982-02-01), Gordon
patent: 4323740 (1982-04-01), Balash
patent: 4343975 (1982-08-01), Sado

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