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Security device for merchandise and the like

DC
  • US 5,543,782 A
  • Filed: 11/16/1993
  • Issued: 08/06/1996
  • Est. Priority Date: 11/16/1993
  • Status: Expired due to Term
First Claim
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1. A security device for merchandise, comprising:

  • sensor means for attachment to merchandise, and two-wire connector means for electrically connecting said sensor means to an alarm circuit;

    said alarm circuit having means for sending current via said two-wire connector means to said sensor means and back to said alarm circuit to display a secure mode signal,said alarm circuit further having means for sending current to an alarm means to sound an alarm and display an alarm mode signal,wherein said alarm circuit comprises switch means for switching said alarm circuit to an alarm mode when at least one of the following conditions occurs;

    said two-wire connector means is cut or detached from at least one of a housing having said alarm circuit therein or from said sensor means;

    orsaid sensor means is detached from said merchandise; and

    a jack means on said housing, andplug means on said two-wire connector means said jack means and said plug means forming a means for electrically connecting said alarm circuit to said two-wire connector means,wherein said jack means comprises switch means moveable upon insertion or removal of said plug means from said jack means by moving from a first secure state to an interim alarm state and then to a second secure state, whereby current is prevented from flowing to generate said secure mode signal during said interim alarm state when said plug means is inserted or removed from said jack means.

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