Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent
1977-07-26
1979-04-10
Reynolds, Bruce A.
Electricity: electrical systems and devices
Electrostatic capacitors
Fixed capacitor
200DIG1, 219 1049R, 219 1077, 219506, 340365L, H05B 508, H02B 102
Patent
active
041492170
ABSTRACT:
The specification discloses a touch control panel particularly adapted for use with an induction heating cook-top. The panel includes a plate of insulating material such as glass having outer and inner planar surfaces separated by a predetermined thickness. Discrete conductive film areas such as tin oxide are formed on the outer planar surface of the plate. A printed circuit board includes a plurality of pairs of spaced apart conductive regions formed of copper or the like thereon. Springs are provided to urge the printed circuit board continually against the inner surface of the plate, such that the pairs of conductive regions are disposed in a predetermined symmetrical orientation below the film areas on the outer surface of the plate. Circuitry is connected on the printed circuit board and is coupled to the conductive regions in order to generate electrical signals in response to contact with the film area by a finger of the operator. By touching various ones of the film areas formed on the plate, the operator can then control the energization and heating level of the induction heating coils located in the cook-top
REFERENCES:
patent: 2760123 (1956-08-01), Wills
patent: 3701869 (1972-10-01), Jacob et al.
patent: 3974472 (1976-08-01), Gould
patent: 4001699 (1977-01-01), Denny et al.
patent: 4045629 (1977-08-01), Auzani
patent: 4046991 (1977-09-01), Sefton et al.
Rangaire Corporation
Reynolds Bruce A.
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