Encoded keyboard switch

Details Encoded keyboard switch Encoded keyboard switch

1983-06-08

1984-05-22

Scott, J. R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200292, H01H 1370

Patent

active

044503245

ABSTRACT:
Encoded keyboard switch comprises a single sheet of flexible film which has switch electrodes and circuit conductors applied to one surface. The sheet of film is folded to form four sections. After folding, the switch electrodes of the two upper sections are opposed to each other and the electrodes of the remaining two sections are opposed to each other so that when the folded film is pressed at a switch site, the two switches formed by the opposed electrodes are sequentially closed. The switch electrodes are interconnected in accordance with an improved encoding scheme which results in a reduced requirement in the number of circuit conductors, the elimination of some switch electrodes, and other advantages.

REFERENCES:
patent: 4081898 (1978-04-01), Taylor, Jr. et al.
patent: 4356358 (1982-10-01), Fukukura

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