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Acoustic coupling free electric drum

  • US 4,279,188 A
  • Filed: 09/21/1979
  • Issued: 07/21/1981
  • Est. Priority Date: 09/21/1979
  • Status: Expired due to Term
First Claim
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1. In combination a drum having a drum head and a variable resistance electromechanical transducer substantially contiguous with said head and comprising first and second conductive members is surface contact with and spaced by a carbon impregnated resilient, dielectric, synthetic organic polymer matrix defining a drum head hit pressure responsive, variable resistance medium between said members in acoustic coupling free relation.

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