Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1983-01-26
1985-11-26
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200 86R, 200159B, H01H 1370
Patent
active
045556016
ABSTRACT:
A membrane keyboard containing larger size key pad label and a smaller size key pad labels; a pair of laminate sheets carry confronting conductor electrodes, each of the conductor electrodes being shaped to exactly follow the corresponding key pad label; and spacer sheet disposed between the pair of laminate sheets for electrically separating the confronting conductor electrodes. The spacer sheet is provided with a plurality of openings formed at positions corresponding to each of the conductor electrodes. The openings corresponding to the larger size key pad labels are divided into at least two sections through the use of, for example, a bridge layer extending across the opening, thereby uniforming the key actuation condition.
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patent: 4037069 (1977-07-01), Gonzalez et al.
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patent: 4471177 (1984-09-01), Doughty
Scott J. R.
Sharp Kabushiki Kaisha
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