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Electronic vehicle security system

DC
  • US 5,157,375 A
  • Filed: 01/04/1991
  • Issued: 10/20/1992
  • Est. Priority Date: 12/28/1987
  • Status: Expired due to Term
First Claim
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1. A vehicle security system comprising means for detecting attempted intrusions to a vehicle when the system is put into the armed mode, means responsive to indications of a detected intrusion for activating an audible signal generating device for a predetermined alarm cycle duration, said means responsive to indications of a detected intrusion resetting after expiration of said duration so as to be activated again in the event of another intrusion after the first of said detected intrusions, and means for disabling, until said system has been disarmed and rearmed, further operation of said audible signal generating device in response to indications of a detected intrusion from said detecting means after said audible signal generating device has been activated by said detecting means a predetermined cumulative time interval after the system has been put into the armed mode, said cumulative time interval being longer than said alarm cycle duration, thereby reducing the noise pollution which might otherwise be created by a repetitive alarm condition.

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