Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-08-29
1996-11-12
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
340693, G08B 1314
Patent
active
055744311
ABSTRACT:
A security tag used with an electronic article surveillance system for detecting the presence of the tag within a surveilled area utilizing electromagnetic energy at a frequency within a predetermined detection frequency range includes a dielectric substrate having first and second opposing principle surfaces and a resonant circuit capable of resonating at a frequency within the predetermined detection frequency range. The resonant circuit includes an inductor formed at least in part on one of the principal surfaces of the substrate. A first perforation path formed of a series of spaced apart perforations extends along a line across the substrate and through at least a portion of the inductor such that a stress exerted on the tag breaks the tag and the inductor along the first perforation path, causing an open circuit condition which prevents the resonant circuit from resonating.
In use, the security tag is affixed to an article and the stress applied to the article is a result of normal or ordinary use of the article.
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Mazoki Gary T.
McKeown Thomas J.
Checkpoint Systems Inc.
Lee Benjamin C.
Mullen Thomas
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