Mechanically-actuated transparent touchbars and touchplates

Details Mechanically-actuated transparent touchbars and touchplates Mechanically-actuated transparent touchbars and touchplates

1982-08-23

1985-09-24

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

200 5A, 340365R, 400100, 400489, G08C 900

Patent

active

045435634

ABSTRACT:
A transparent touchbar or touchplate is supported at its edges by a plurality of push-button switches. A plurality of valid touchpoints exist; and the touching of each can be distinguished, though the number of touchpoints is larger than the number of pushbuttons. This is done by logically combining the responses to the push-button switch closures occasioned by the application of force to any one of the valid touchpoints.

REFERENCES:
patent: 3312892 (1967-04-01), Parnes
patent: 3495232 (1970-02-01), Wagner
patent: 3702957 (1972-11-01), Wolfendale
patent: 4029915 (1977-06-01), Ojima
patent: 4103252 (1978-07-01), Bobick
patent: 4118611 (1978-10-01), Harris
patent: 4177421 (1979-12-01), Thornburg
patent: 4246452 (1981-01-01), Chandler
patent: 4400593 (1983-08-01), Kunz
patent: 4440515 (1984-04-01), Nassimbene

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