Occupant sensing apparatus

  • US 5,624,132 A
  • Filed: 10/20/1995
  • Issued: 04/29/1997
  • Est. Priority Date: 04/09/1991
  • Status: Expired due to Term
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First Claim
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1. An occupant sensing apparatus for use in an occupant restraint system, comprising:

  • a film having an electrical characteristic with changeable states;

    means for mounting said film in a vehicle seat so that presence of an occupant on said seat effects deformation of said film, deformation of said film effecting a change in a state of said electrical characteristic of said film;

    electric circuit means connected to said film for providing a first signal when said film characteristic is indicative of an occupant not being present, a second signal when said film characteristic is indicative of an occupant being present, and a third signal if a fault condition is monitored; and

    means for enabling the occupant restraint system when said electric circuit means either monitors a film characteristic indicative of an occupant being present or a fault condition.

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