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FOAM SEAT SENSOR

  • US 3,749,866 A
  • Filed: 05/01/1972
  • Issued: 07/31/1973
  • Est. Priority Date: 05/01/1972
  • Status: Expired due to Term
First Claim
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1. A planar, low profile switch assembly operable by localized deformation by a human body sitting upon the same, said assembly comprising:

  • an upper flexible, resilient electrically conductive metal strip, a similar, lower, flexible, resilient, electrically conductive metal strip, a foam member interposed between said strips tending to maintain said strips in spaced, non-contact position in the absence of said human body, at lease one primary lance partially struck from said upper strip and normally lying in the same plane as the upper strip proper, but being relatively displaceable toward the other strip during forceable depressible distortion of said assembly, said foam member including an opening surrounding said primary lance to permit deflection of said lance within said foam member opening towards the strip and into contact therewith, and said primary lance including at least one other short, secondary lance formed within the same and projecting downwardly therefrom in the same direction as said primary lance deflection for initial contact with said lower metal strip.

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