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Pressure switch

  • US 4,200,777 A
  • Filed: 06/12/1978
  • Issued: 04/29/1980
  • Est. Priority Date: 04/22/1977
  • Status: Expired due to Term
First Claim
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1. Pressure switch means comprising an intermediate layer of non-conductive resiliently yieldable sheet material with openings, a pair of contact layers of conductive flexible sheet material in unsecured facing engagement with opposite sides of and defining a sandwich with said intermediate layer, said sandwich being flexible for electrical contact of said contact layers through one of said openings of said intermediate layer, and a pair of enclosure layers of non-conductive flexible sheet material in unsecured facing engagement with opposite sides of said sandwich, one pair of opposite edge margins of said intermediate layer extending beyond said contact layers and being secured to and between said enclosure layers without securement to said contact layers, said enclosure and intermediate layers combining to define flat pockets on opposite sides of said intermediate layer conformably receiving said contact layers without positive securement to the latter.

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