Touch operated capacitive switch for electronic musical instrume

Details Touch operated capacitive switch for electronic musical instrume Touch operated capacitive switch for electronic musical instrume

1977-06-23

1979-10-16

Witkowski, Stanley J.

Music

Instruments

200 52R, 200DIG1, 340365C, 361283, G10H 102

Patent

active

041709160

ABSTRACT:
A touch operated capacitive switch for altering electrical signals controlling the mode of operation of an electronic musical instrument. The switch comprises a thin laminate having a non-conducting lamina sandwiched between a conducting touch electrode and a conducting guard electrode, each electrode having an electrical connector for connecting the switch to alternating electrical signals having substantially the same phase and amplitude to reduce the capacitance between the touch electrode and points of ground potential located in or on the instrument for increasing the sensitivity of the switch. The switch is non-conductively secured to the instrument with the guard electrode facing the instrument, such that the capacitance of the switch may be altered by touching the touch electrode.

REFERENCES:
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patent: 3492440 (1970-01-01), Cerbone et al.
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patent: 3943812 (1976-03-01), Nagai et al.
patent: 3971013 (1976-07-01), Challoner et al.
patent: 4016490 (1977-04-01), Weckenmann et al.
patent: 4056699 (1977-11-01), Jordan
patent: 4064688 (1977-12-01), Sasaki et al.

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