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Capacitance switch arrangement

  • US 4,400,758 A
  • Filed: 06/29/1981
  • Issued: 08/23/1983
  • Est. Priority Date: 06/29/1981
  • Status: Expired due to Term
First Claim
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1. A capacitance switch comprisinga substrate,a first conductive contact carried by said substrate,a flexible sheet extending over said substrate,a second conductive contact carried by said flexible sheet and aligned with and ordinarily spaced from said first contact,a capacitance spacing element carried by one of said substrate and said flexible sheet, located other than directly under or above said contacts,said capacitance spacing element comprisingan inner insulating layer andouter conductive portions, one said conductive portion being electrically connected to one said contact, andfirst means for connection of the other said contact and the other said conductive portion to external circuitry,whereby said flexible sheet may be flexed to vary the spacing between said contacts to increase the capacitance of said switch.

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