Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1986-10-17
1987-09-15
Shoop, Jr., William M.
Communications: electrical
Audible indication
Percussion-type sound producer
307116, 324 60C, 340365C, H03M 100
Patent
active
046942793
ABSTRACT:
An electronic control device for providing control signals having direction and magnitude represented by electrical output signals based upon employing a circuit that senses relative changes in capacitance with a few volt excitation at suitable frequency. A finger touch unbalances the equilibrium between a pair of capacitance electrodes which by means of the circuitry selectively produces signals representative of magnitude and direction, and whose rate is proportional to the degree of unbalance, and which signals are used for vector control purposes. The electrodes are positioned in a recessed slot in an encasement, which slot is accessible by fingers, and which pair of capacitance electrodes is protected by a dielectric layer.
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Blum Richard K.
Shoop Jr. William M.
Silverman Arnold B.
University of Pittsburgh
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