Touch plate assembly

Details Touch plate assembly Touch plate assembly

1975-11-13

1977-11-01

Schaefer, Robert K.

Electricity: circuit makers and breakers

Multiple circuit control

Multiple switch

200DIG1, H01H 926

Patent

active

040566994

ABSTRACT:
A touch plate assembly for a digital control device. The touch plate is sectioned off into a plurality of touch switch areas, each of which represents certain information to be entered into the control circuit. The touch plate and a printed circuit board, carrying the detection circuitry are held in place by a housing which may carry other circuitry as well. Electrical connections between the detection circuitry and the touch switches are made by resilient spring contact members rigidly mounted on the circuit board and soldered in place as a component. A combination shield-filter assembly is bonded to the back of the touch plate. The shield-filter assembly includes a metal-polyester laminate having windows therein, through which the spring contact members make electrical contact to contact areas on the touch plate. In addition, certain portions of the metal layer are removed so that light from a light source located on the printed circuit board may be seen by the user of the control.

REFERENCES:
patent: 3492440 (1970-01-01), Cerbone et al.
patent: 3591749 (1971-07-01), Comstock
patent: 3623127 (1971-11-01), Glenn
patent: 3696409 (1972-10-01), Braaten
patent: 3732389 (1973-05-01), Kaelin et al.
patent: 3767974 (1973-10-01), Donovan, Jr. et al.
patent: 3974332 (1976-08-01), Abe et al.
Rice, R. and Shea, J. J., "Circuit Board Assembly," IBM Technical Disclosure Bulletin, vol. 4, No. 9, Feb. 1962, p. 7.

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