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Battery lock anti-theft system

  • US 4,553,127 A
  • Filed: 06/30/1983
  • Issued: 11/12/1985
  • Est. Priority Date: 06/30/1983
  • Status: Expired due to Term
First Claim
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1. An access control system for a vehicle having an electrical system including a battery and a starter motor, the access control system comprising:

  • current passing means for selectively passing current limited to a first, preselected current level which is insufficient to operate the starter motor, and current of a second current level which is sufficient current to operate the starter motor, the first current level being sufficiently high to operate vehicle electrical devices which draw less current than the lstarter motor unimpaired, the current passing means being connected electrically between the battery and the starter motor;

    current level selection means for selectively enabling the current passing means to pass one of the first and second current levels, the current level selection means including means for determining whether a received access control signal includes a preselected access code and timing means, the access code determining means and the timing means being operatively connected with the current passing means for enabling the current passing means to pass current of the second current level for a preselected duration in response to receiving the preselected access code, whereby when the current passing means is enabled, the vehicle operates normally and, when the current passing means is disabled, the vehicle operates as if it has a low battery.

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