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Theft prevention device for automobiles

  • US 4,933,664 A
  • Filed: 09/13/1988
  • Issued: 06/12/1990
  • Est. Priority Date: 09/30/1987
  • Status: Expired due to Fees
First Claim
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1. An automobile theft protection device, comprising:

  • an alarm circuit for intermittently energizing an alarm horn;

    sensor means for detecting a monitored action;

    a control unit for controlling said alarm circuit so as to intermittently energize said alarm horn when said monitored action is detected by said sensor means during a period of time after an automobile door is locked according to a predetermined procedure and before said automobile door is properly unlocked;

    a starter circuit including a starter switch connected to an automobile engine starter; and

    means within said control unit for opening said starter switch during said period of time after said automobile door has been locked according to said predetermined procedure and before said automobile door is properly unlocked.

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