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Capacitive key for electronic circuit

  • US 3,951,250 A
  • Filed: 04/08/1974
  • Issued: 04/20/1976
  • Est. Priority Date: 04/06/1973
  • Status: Expired due to Term
First Claim
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1. In a keyboard having keys each carrying a conductive elastomeric striker which striker is movable, by depression of the key, towards conductive elements on a fixed member to effect capacitive coupling therebetween;

  • the improvement comprising the provision, over said conductive elements, of dielectric material coated with conductive material in regions on its upper surface to be directly contacted by the striker, said conductive elements being adjacent to the other surface of the dielectric material, at least one conductive element being located opposite one of said conductive regions.

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