The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 16, 1979
Filed:
Jun. 23, 1977
William L Fritz, Cincinnati, OH (US);
Walter Munch, Ft. Thomas, KY (US);
D. H. Baldwin Company, Cincinnati, OH (US);
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.