Electronic article surveillance system

Details Electronic article surveillance system Electronic article surveillance system

1996-03-11

1999-01-12

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

340571, 340551, 340568, G08B 1314

Patent

active

058595864

ABSTRACT:
An E.A.S. capable of surely detecting magnetic fluxes emitted from transmission antennas irrespective of the position of a reception coil within a tag attached to goods. In order to emit magnetic fluxes into an aisle through which customers pass, the system is equipped with at least two transmission antennas 1, 3. These transmission antennas 1, 3 are driven in a time-sharing way so as not to concurrently emit the magnetic fluxes.

REFERENCES:
patent: 4135183 (1979-01-01), Heltemes
patent: 4135184 (1979-01-01), Pruzick
patent: 4686513 (1987-08-01), Farrar et al.
patent: 5126749 (1992-06-01), Kaltner
patent: 5221831 (1993-06-01), Geiszler
patent: 5327118 (1994-07-01), Drucker et al.
patent: 5589819 (1996-12-01), Takeda

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