Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1989-02-09
1990-10-09
Swann III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
340539, 340568, 340693, G08B 1324
Patent
active
049623699
ABSTRACT:
A security system for monitoring retail merchandise such as garments includes a radio frequency transmitter tag attachable to the garment by a cable passed through a portion of the garment. The cable has one end affixed to the tag housing and a free end slidably disposed in the housing whereby the tag and cable form a variable length closed loop preventing removal of the tag from the garment. The cable includes a pair of conductors insulated from each other and connected between the transmitter circuit and a capacitive discharge power supply inside the tag. An attempt to cut the cable causes the conductors to come into contact thereby energizing the transmitter which transmits a modulated radio frequency signal burst. The capacitive discharge supply is powered by a battery whose longevity approaches shelf life. An arrangement for removing the cable from the tag by authorized personnel is also disclosed.
The security system includes a receiver/processor for receiving and demodulating RF signals and generating an alarm signal if the detected signal falls within a predetermined frequency range.
Also disclosed are alternative embodiments of the security tag as well as arrangements for integrating the security system, or portions thereof, into an existing sensor loop merchandise monitoring system.
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Marcia Israel
Swann III Glen R.
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