Compact keyboard structure

Details Compact keyboard structure Compact keyboard structure

1978-06-26

1980-10-14

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

174 685, 200159B, 200292, 361409, H01H 1370, H05K 100

Patent

active

042283299

ABSTRACT:
A keyboard structure permitting the interconnection of several hundred flexible key structures in a compact area. The structure includes a matrix of key cells disposed on an insulating surface, the row elements being commonly connected by conductive paths on the surface while the column elements are electrically separate. A contact point for each row and each column element extends to the opposite side of the insulating surface. These contact points are so disposed that parallel conductive paths which run only in the vertical direction may be used to provide row-select and column-select indications.

REFERENCES:
patent: 3514356 (1970-05-01), Ruppert
patent: 3600528 (1971-08-01), Leposavic
patent: 3627927 (1971-12-01), Schmitz
patent: 3676615 (1972-07-01), Wiedmer
patent: 3676616 (1972-07-01), Wiedmer
patent: 3699294 (1972-10-01), Sudduth
patent: 3721778 (1973-03-01), Seeger, Jr. et al.
patent: 3761944 (1973-09-01), Shimojo
patent: 3898421 (1975-08-01), Suzumura
patent: 4055735 (1977-10-01), Eachus et al.
patent: 4096577 (1978-06-01), Ferber et al.
patent: 4127740 (1978-11-01), LaMarche

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