Data encoding keyboard

Details Data encoding keyboard Data encoding keyboard

1976-09-16

1978-10-10

Nusbaum, Mark E.

Boots, shoes, and leggings

340365S, 364709, 200 11TW, 200159A, 200155R, 200 5A, G06F 302, G06F 738

Patent

active

041200446

ABSTRACT:
A data encoding keyboard for use in electronic processing systems such as electronic calculators includes a pushbutton encoded thumbwheel switch. A plurality of cams secured to the switch define different codes in accordance with the angular orientation of the thumbwheel. The cams engage contacts on a printed circuit matrix adjacent the thumbwheel when the thumbwheel is depressed.

REFERENCES:
patent: 3703613 (1972-11-01), Abel
patent: 3772597 (1973-11-01), Stover
patent: 3870840 (1975-03-01), Rivetta et al.
patent: 3990053 (1976-11-01), Evans
patent: 4007364 (1977-02-01), Ojima et al.

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