Touch sensing keyboard construction

Details Touch sensing keyboard construction Touch sensing keyboard construction

1979-01-15

1981-09-08

Groody, James J.

Communications: electrical

Audible indication

Percussion-type sound producer

328142, 340365C, G06F 302

Patent

active

042887860

ABSTRACT:
The keys of a keyboard when operated serve as information entry elements by providing an associated output signal related thereto. A first series of conductors is operatively coupled to the keys for electrically sensing operation of the keys. A series of pairs of conductors common to the first series of conductors is arranged to represent binary stages of information. A signal representative of the operation of each one of the first series of conductors is coupled to one or the other conductor of each of the pairs of conductors to represent a first or second state thereof. These states are employed to provide a binary output representation for each of the keys when so operated.

REFERENCES:
patent: 2647689 (1953-08-01), Bowyer et al.
patent: 2657856 (1953-11-01), Edwards
patent: 3065298 (1962-11-01), Saykay
patent: 3641410 (1972-02-01), Vogelsberg
patent: 3750113 (1953-07-01), Cencel
patent: 4088994 (1978-05-01), McNay
"Non-Mechanical Keyboard", Goddard, IBM Tech. Disc., vol. 3, No. 11, Apr. 1961, p. 31.

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