Audible tag for magnetic electronic article surveillance systems
First Claim
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1. A tag for use in a magnetic article surveillance system comprising:
- antenna means responsive to a magnetic field;
and piezoelectric means responsive to said antenna means for generating an audible acoustic signal.
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Abstract
A tag for use in a magnetic article surveillance system employs an antenna means responsive to a transmitted magnetic signal and a piezoelectric means responsive to the antenna means for generating an audible acoustic signal. Embodiments are provided responding to unmodulated, amplitude modulated, and frequency modulated magnetic signals.
20 Citations
15 Claims
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1. A tag for use in a magnetic article surveillance system comprising:
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antenna means responsive to a magnetic field; and piezoelectric means responsive to said antenna means for generating an audible acoustic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic article surveillance system comprising:
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means for transmitting a magnetic field; and a tag comprising; antenna means responsive to said magnetic field; and
piezoelectric means responsive to said antenna means for generating an audible acoustic signal. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification