Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1986-05-02
1988-09-13
Caldwell, Sr., John W.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
200159B, H01H 908
Patent
active
047712775
ABSTRACT:
A touch sensitive data input device is provided for use with the screen of a cathode ray tube. The device has an annular bezel that loosely supports a firm clear backing plate. A rear transparent sheet element that has a coefficient of thermal expansion different from that of the backing plate is loosely retained against the backing plate to avoid deformation induced by differential thermal expansions. A closely spaced apart front transparent element is placed adjacent the rear transparent sheet, their respective adjacent surfaces having mutually orthogonal electrically conductive strips that make local electrical contact when a force is applied to the front element. An annular frame over the front element is secured to the bezel. In one aspect of the invention, a gasket with both sides coated with a resilient bonding material seals the frame to the bezel to protect the zone between the transparent front and rear elements from contamination by environmental pollutants.
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G. G. Promis et al., "Control Panel", IBM Technical Disclosure Bulletin, vol. 19, No. 2, July 1976, pp. 405-406.
"Product Design and Process Engineering", Niebel et al., McGraw-Hill, 1974, p. 744.
Barbee Peter F.
Galloway Jack L.
Caldwell Sr. John W.
Oberley Alvin
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