Audible tag for magnetic electronic article surveillance systems

Details Audible tag for magnetic electronic article surveillance systems Audible tag for magnetic electronic article surveillance systems

1990-08-03

1991-04-30

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340572, G08B 1318

Patent

active

050122240

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.

REFERENCES:
patent: 3713133 (1973-01-01), Nathans
patent: 3755803 (1973-08-01), Cole et al.
patent: 4242671 (1980-12-01), Plows
patent: 4558307 (1985-12-01), de Jeude
patent: 4573042 (1986-02-01), Boyd et al.
patent: 4622543 (1986-11-01), Anderson, III et al.
patent: 4812811 (1989-03-01), sbrink et al.

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