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Sobriety interlock with service reminder

  • US 4,912,458 A
  • Filed: 06/17/1988
  • Issued: 03/27/1990
  • Est. Priority Date: 06/17/1988
  • Status: Expired due to Term
First Claim
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1. A sobriety interlock for a machine, said sobriety interlock comprising:

  • (a) sensor means for detecting an intoxicating substance in the breath of a person;

    (b) control means connected to said sensor means and connectable to the machine, said control means normally operating to enable starting of the machine only if at least a first predetermined condition is satisfied, and(c) timer means and indicator means each operably connected to said control means, said timer means being operable to initiate generation of a humanly-perceptible indication at a first specified time to provide a reminder that the interlock is due for service, said timer means further initiating generation of a second signal at a second specified time after said first specified time, said second signal being received by said control means to cause said control means to thereafter enable starting of the machine, regardless of whether said first precondition is satisfied, until said timer means is reset in response to a coded signal which cannot ordinarily be generated by said person.

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