Method and apparatus for electronic article surveillance

Details Method and apparatus for electronic article surveillance Method and apparatus for electronic article surveillance

1989-12-27

1991-06-25

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

307 66, 340693, G08B 1314, H02J 700

Patent

active

050271067

ABSTRACT:
In an electronic article surveillance system, a low-power supply is used to power the system during ordinary search-and-detect operation, and the increased power needed to transmit high-power signals for deactivating the tag circuit is produced by charging up a rechargable storage device, such as a capacitor or rechargable battery, in the intervals between deactivations and using the charged-up storage device to provide the high supply power needed during deactivation, to generate the deactivation transmission.

REFERENCES:
patent: 3624631 (1971-11-01), Chomet et al.
patent: 3938044 (1976-02-01), Lichtblau
patent: 4567473 (1986-01-01), Lichtblau
patent: 4728938 (1988-03-01), Kaltner
patent: 4906974 (1990-03-01), Rehder

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