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Electronic article surveillance security system

  • US 4,573,042 A
  • Filed: 03/14/1983
  • Issued: 02/25/1986
  • Est. Priority Date: 03/14/1983
  • Status: Expired due to Term
First Claim
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1. Portable apparatus for releasable attachment to articles subject to surveillance in a surveillance system of type involving radiant energy transmissions into an area of interest, said apparatus comprising:

  • (a) attachment means for effecting such releasable attachment of said apparatus to an article and including an electrical circuit element having first and second states corresponding respectively to attachment thereof to said article and to release there from such attachment;

    (b) alarm means operable for generating an output indicative of an alarm condition;

    (c) receiver means for receipt of said radiant energy transmitted messages; and

    (d) control circuit means connected to both said attachment means and said receiver means means for response to either of said attachment means second state or to said messages received by said receiver means for operating said alarm means to generate said output indicative of an alarm condition.

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