Self-sounding tag alarm
First Claim
1. A self-sounding tag alarm apparatus for use on a commodity to prevent shoplifting, said apparatus comprising:
- a main housing;
coupling means for detachably attaching the main housing to the commodity;
alarm generating means mounted in said main housing for generating an alarm;
detecting means for detecting at least one of a signal of a particular frequency produced externally of said main housing and removal of said coupling means;
reset signal input means on said main housing for having a reset signal applied thereto, said reset signal being provided externally of said main housing, said reset signal input means including a resonator circuit for detecting an electromagnetic wave of a predetermined frequency, said electromagnetic wave of a predetermined frequency being different from the signal of a particular frequency produced externally of said main housing, and a comparator, said comparator being enabled when an output of said resonator circuit exceeds a predetermined level; and
reset signal generating means for generating the electromagnetic wave of a predetermined frequency, said electromagnetic wave of a predetermined frequency being a reset signal, said reset signal generating means including an oscillator coil disposed in a flat housing.
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Accused Products
Abstract
A self-sounding tag alarm apparatus having a tag type main body attached to a commodity and automatically operable to sound an alarm when an attempt is made to steal the commodity. The apparatus includes a coupling such as a wire, pin or the like for detachably attaching the main apparatus body to the commodity, an alarm generator mounted in the main apparatus body, a detector for detecting a signal of a particular frequency produced externally of the main apparatus body and removal of the coupling, a reset signal intake device for taking into the main apparatus body a reset signal applied externally of the main apparatus body, and an alarm control device for rendering the alarm generator operative based on a detection signal received from the detector, and rendering the alarm generator inoperative based on the reset signal received from the reset signal intake device.
83 Citations
6 Claims
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1. A self-sounding tag alarm apparatus for use on a commodity to prevent shoplifting, said apparatus comprising:
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a main housing; coupling means for detachably attaching the main housing to the commodity; alarm generating means mounted in said main housing for generating an alarm; detecting means for detecting at least one of a signal of a particular frequency produced externally of said main housing and removal of said coupling means; reset signal input means on said main housing for having a reset signal applied thereto, said reset signal being provided externally of said main housing, said reset signal input means including a resonator circuit for detecting an electromagnetic wave of a predetermined frequency, said electromagnetic wave of a predetermined frequency being different from the signal of a particular frequency produced externally of said main housing, and a comparator, said comparator being enabled when an output of said resonator circuit exceeds a predetermined level; and reset signal generating means for generating the electromagnetic wave of a predetermined frequency, said electromagnetic wave of a predetermined frequency being a reset signal, said reset signal generating means including an oscillator coil disposed in a flat housing. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification