Anti-shoplifting system

Details Anti-shoplifting system Anti-shoplifting system

1986-10-15

1989-01-24

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340571, G08B 1318

Patent

active

048003697

ABSTRACT:
Anti-shoplifting system comprising a switching circuit, a signal generator, and a detector gate. Said switching circuit has a built-in flat-shaped miniature power pack which is attached to individual goods sold in shops and switches on and maintains the circuit of said power pack switched on under the action of external radiowaves. The signal generator consists of a built-in signal-transmitting circuit for transmitting radio signals of a specific frequency from said power supply. The detector gate is provided with a signal-generating state forming a weak radiowave area of the required frequency to energize the switching circuit of said signal generator and receives the radiowaves transmitted from said signal generator so as to drive an alarm device via said received signals.

REFERENCES:
patent: 3493955 (1970-02-01), Minasy
patent: 3713133 (1973-01-01), Nathans
patent: 4211995 (1980-07-01), Smith

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