Capacitive touch control

Details Capacitive touch control Capacitive touch control

1978-02-21

1979-06-12

Goldberg, E. A.

Electricity: electrical systems and devices

Electrostatic capacitors

Variable

200DIG1, 361292, 361300, H01G 504

Patent

active

041582160

ABSTRACT:
A control for use upon a solid panel, devoid of control shaft apertures, allows data entry by rotational positioning of an electrode to vary the capacitance to at least one of a multiplicity of electrodes formed upon an interior surface of the panel. A magnetizable disk is attached to the exterior of the panel, with the control knob having a magnetized member attracted to the disk for maintaining the control knob in proper position while allowing control knob rotational adjustments. A light-emitting display is positioned behind the panel to indicate the index of the control knob by means of a variable-length, circular bar of light.

REFERENCES:
patent: 4089817 (1978-05-01), Kirkendall
patent: 4090092 (1978-05-01), Serrano

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