Data input device and method

Details Data input device and method Data input device and method

1994-05-12

1995-12-05

Chin, Tommy P.

Computer graphics processing and selective visual display system

Display peripheral interface input device

Including keyboard

341 20, 200 6A, 400485, H01H 2500

Patent

active

054733464

ABSTRACT:
A data input device and method for producing signals corresponding to symbols, comprises: at least one manually actuatable switch having a home state and manually actuatable from the home state to one of a set of first states and manually actuatable from the set of first states to one of a set of second states including the home state. A first signal corresponding to a transition from the home state to a selected one of the set of first states is produced and a second signal corresponding to a transition from the selected one of the set of first states to a selected one of the set of second states is produced. An output signal representing one symbol is produced in response to the first and second signals.

REFERENCES:
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patent: 3833765 (1974-09-01), Hilborn et al.
patent: 4791408 (1988-12-01), Heusinkveld
patent: 4833446 (1989-05-01), Eilam et al.
patent: 4897649 (1990-01-01), Stucki
patent: 4917516 (1990-04-01), Retter
patent: 4971465 (1990-11-01), Hashimoto
Xerox Disclosure Journal, vol. 1, No. 2, Feb. 1976.
IBM Technical Disclosure Journal, vol. 26, No. 7B, Dec. 1983.
IBM Technical Disclosure Journal, vol. 23, No. 2, Jul. 1980.

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