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Pressure transducer for musical instrument control

  • US 5,079,536 A
  • Filed: 03/05/1990
  • Issued: 01/07/1992
  • Est. Priority Date: 03/05/1990
  • Status: Expired due to Term
First Claim
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1. A pressure-to-conductance transducer comprising:

  • a rigid base plate providing a flat non-conductive surface;

    a pair of adjacent coplanar conductive contact plates, separated by an elongated gap and affixed to the surface of said base plate;

    a cover cap having a planar sensor portion, and having a sidewall portion disposed in a peripheral region surrounding said pair of contact plates and secured to said base plate, the sensor portion, being disposed in a plane parallel with that of the base plate surface, having an outward surface adapted to receive pressure applied by an operator, and an opposed inward surface facing said contact plates;

    a resistive element having a surface affixed to the inward surface of the sensor portion of said cover cap and having an opposed inwardly-facing resistively coated surface;

    compliant means, associated with said cover cap, enabling varying pressure, applied by an operator to the outward surface of said cover cap sensor portion, to vary an area of contact between said resistive element coating and said contact plates, and to thus manifest a corresponding variable conductance value between said contact plates.

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