Mechanically-actuated touchbars and touchplates using multiple-c

Details Mechanically-actuated touchbars and touchplates using multiple-c Mechanically-actuated touchbars and touchplates using multiple-c

1982-08-23

1985-09-24

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

200 5A, 340365R, 400100, G08C 900

Patent

active

045435626

ABSTRACT:
A touchbar or touchplate is supported on its edges by force-sensitive switches, such as push-button switches, each having a plurality of contacts opened or closed at different pressure thresholds. The pattern of which contact conditions of conduction or non-conduction is converted to logic ONES's and ZERO's and decoded to obtain indications to which a plurality of touchpoint regions on the touchbar or touchplate a user applies force.

REFERENCES:
patent: 3225883 (1965-12-01), Ayres
patent: 3312892 (1967-04-01), Parnes
patent: 3702957 (1972-11-01), Wolfendale
patent: 4103252 (1978-07-01), Bobick
patent: 4118611 (1978-10-01), Harris
patent: 4177421 (1979-12-01), Thornburg

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