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Multiple conductor security tag

  • US 5,977,877 A
  • Filed: 05/18/1998
  • Issued: 11/02/1999
  • Est. Priority Date: 05/18/1998
  • Status: Expired due to Term
First Claim
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1. A security tag comprising a strap for securing the tag to an object to be protected and an electronic module connected to the strap for detecting an attempt to defeat the tag by short circuiting and severing the strap, the strap being formed of plural discrete conductors connected to the electronic module, which conductors are insulated from each other along at least a substantial length of the strap, wherein short circuiting of opposite ends of a single one of the conductors followed by severance of plural ones of the insulated conductors, or short circuiting between various separate insulated conductors can be detected by the electronic module as an alarm condition, and wherein severance or misconnection of only one or a small number of the insulated conductors is detected by the electronic module as not being an alarm condition.

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