Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1993-01-04
1994-10-04
Swann, Glen
Communications: electrical
Condition responsive indicating system
Specific condition
340556, 340566, G08B 13184, G08B 13181
Patent
active
053530110
ABSTRACT:
An improved electronic article security system is employed for detecting the presence of a security tag within a detection zone. The system includes a transmitter for generating electromagnetic energy and, in the disclosed embodiment, a single antenna for emitting electromagnetic energy received from the transmitter to establish an electromagnetic field within the detection zone and for sensing disturbances within the electromagnetic field, including disturbances resulting from a security tag within the detection zone. A receiver is provided for processing signals from the antenna relating to sensed disturbances and for providing output signals. A data processing and control section analyzes the output signals from the receiver and determines whether a sensed disturbance within the electromagnetic field is caused by the presence of a security tag within the detection zone. The output signals from the receiver are analyzed in accordance with predetermined criteria and pattern recognition techniques based upon receiver output signals which would be expected if a security tag were present in the detection zone to establish a security tag probability percentage.
REFERENCES:
patent: 4023167 (1977-05-01), Wahlstrom
patent: 4382291 (1983-05-01), Nakauchi
patent: 4512000 (1985-04-01), Masuko
patent: 4668942 (1986-05-01), Eccleston et al.
patent: 4686517 (1987-08-01), Fockens
patent: 4812822 (1989-03-01), Feltz et al.
patent: 4859991 (1989-08-01), Watkins et al.
patent: 5023598 (1991-06-01), Zemlok et al.
patent: 5051727 (1991-09-01), Fockens
patent: 5103234 (1992-04-01), Watkins et al.
patent: 5243183 (1993-09-01), Barron, Jr.
Abrams Burton S.
Cannon Joseph M.
Casey Stephen J.
Chang Luke C.
Ertwine Von C.
Checkpoint Systems Inc.
Swann Glen
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