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Dual function theft prevention system

  • US 5,610,446 A
  • Filed: 12/22/1995
  • Issued: 03/11/1997
  • Est. Priority Date: 12/22/1995
  • Status: Expired due to Fees
First Claim
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1. A dual function theft prevention system comprising, in combination:

  • a rectangular housing having a top wall, a bottom wall, a front face, a rear face, and a pair of side walls defining an interior space, the housing adapted to be coupled to a conventional vehicle instrument panel;

    a power source comprising a conventional automobile battery;

    a plurality of numeric keys situated on the front face of the housing for allowing a driver to enter a four digit numeric code sequence, wherein the keys are staggered so as to allow ease in entering the code sequence;

    a card comprising a magnetic strip with a card code sequence present thereon;

    a magnetic strip reader comprising a slot horizontally formed on the front face of the housing with a pair of open ends positioned on each of the side walls for receiving the card and further allowing the card to be slid laterally between the open ends, the magnetic strip reader for scanning the code sequence present on the magnetic strip;

    an ignition for actuating a conventional vehicle engine upon the receipt of power from the power source;

    brake circuitry connected to a conventional anti-lock brake system module for engaging brakes of the vehicle upon the activation thereof and further allowing normal operation of the brake system module upon the deactivation thereof;

    a lock key situated on the front face of the housing, the lock key having an activated orientation upon the depression thereof, the lock key including a light emitting diode for signalling when the lock key is in an activated orientation; and

    control circuitry situated within the interior space of the housing and coupled to the power source, the numeric keys, the magnetic strip reader, the ignition, the lock key and the brake circuitry, the control circuitry for transmitting power to the ignition and deactivating the brake circuitry upon receipt of a proper four digit numeric code sequence from the numeric keys and further a proper card code sequence from the magnetic strip reader within a predetermined time period, the control circuitry further precluding power from being supplied to the ignition and further activate the brake circuitry upon the activation of the lock key.

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