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Tripping apparatus for an occupant protection apparatus in vehicles

  • US 4,608,501 A
  • Filed: 01/09/1985
  • Issued: 08/26/1986
  • Est. Priority Date: 01/10/1984
  • Status: Expired due to Fees
First Claim
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1. A tripping apparatus in vehicles, particularly for an occupant protection apparatus in impact restraining systems, having an acceleration sensor, an evaluation circuit and a switching stage serially connected as input to a tripping element in series with an acceleration switch comprisinga test circuit comprisinga series arrangement of a filter tuned to a predetermined frequency, a rectifier and an integrator, andan input circuit means comprising a test generator for introducing to the series arrangement, a test signal comprising an alternating voltage having said predetermined frequency,the input circuit means being connected to a predetermined point of zero potential in the inactive condition, said point being located between the switching stage and the tripping element, andan output means of the test circuit connected to the input of the evaluation circuit, for producing an answering signal at the output of the test circuit.

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