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Selective exit control system

  • US 5,341,126 A
  • Filed: 12/26/1991
  • Issued: 08/23/1994
  • Est. Priority Date: 12/26/1991
  • Status: Expired due to Fees
First Claim
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1. A selective exit control system for determining when a selected person exits a controlled area, comprisingan anklet adapted for attachment to the ankle of the selected person and at least one magnet having a selected flux provided in said anklet;

  • a magnetic detection integrated circuit having at least one "Hall Effect" integrated circuit sensor for generating a detection field having first predetermined magnetic wave-shape characteristics, said detection field taking on second predetermined magnetic wave-shape characteristics when said anklet is present in the detection field, said at least one sensor further receiving the detection field and providing a sensor signal having first predetermined signal characteristics when said anklet is present in the detection field and second predetermined signal characteristics when said anklet is not present in the detection field;

    buffer/amplifier circuit means connected to said at least one "Hall Effect" integrated circuit sensor for amplifying the signal characteristics of the sensor signal; and

    alarm means connected to said magnetic detection integrated circuit and responsive to said buffer/amplifier circuit means amplifying said first predetermined signal characteristics of the sensor signal to provide an alarm signal;

    whereby movement of the selected person through said detection field while wearing said anklet actuates said alarm means.

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