Keyboard with concave and convex domes

Details Keyboard with concave and convex domes Keyboard with concave and convex domes

1977-02-22

1978-12-05

Scott, James R.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200159B, 200292, H01H 1370

Patent

active

041287444

ABSTRACT:
Keyboard device having a top flexible plastic contactor sheet with a first circuit pattern thereon, said first pattern comprising contactors and circuit lines, a bottom sheet having a second circuit pattern comprising contacts and circuit lines, an insulator spacer having openings in register with said contactors, said sheet having formed therein one or a plurality of protrusions or domes which support a portion of the first circuit pattern, and means for continuously urging the one or plurality of protrusions or domes supporting a portion of said first circuit pattern against a portion of said second circuit pattern.

REFERENCES:
patent: 3383487 (1968-05-01), Wiener
patent: 3627935 (1971-12-01), Spievak
patent: 3721778 (1973-03-01), Seeger, Jr. et al.
patent: 3789167 (1974-01-01), Seeger, Jr. et al.
patent: 3854018 (1974-12-01), Reynolds et al.
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3862381 (1975-01-01), Glaister et al.
patent: 3862382 (1975-01-01), Glaister et al.
patent: 3911234 (1975-10-01), Kotaka
patent: 3978297 (1976-08-01), Lynn et al.
patent: 4028509 (1977-06-01), Zurcher
patent: 4029916 (1977-06-01), Chu
patent: 4032729 (1977-06-01), Koistinen
patent: 4066851 (1978-01-01), White et al.
patent: 4081898 (1978-04-01), Taylor, Jr. et al.
J. R. Lester et al., IBM Tech. Disc. Bull., "Switch", vol. 11, No. 11, Apr. 1969, p. 1569

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