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4818312 |
Method of making electronic tags
This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral...
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4811000 |
Article enclosure with magnetic marker deactivating means
An enclosure for receiving and carrying an article provided with a magnetic marker wherein the enclosure includes magnetic means for deactivating the marker when the article is housed within the...
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4799045 |
Method of detecting a label used in an anti-theft surveillance system
Permanently magnetized members (24, 26) of a surveillance system label (16) are disposed adjacent a ferromagnetic nonlinear element (30) for biasing the hysteresis loop of the nonlinear element...
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4797658 |
Article surveillance marker capable of being deactivated by relieving the retained stress therein and method and system for deactivating the marker
The active component of an electronic article surveillance amorphous marker has retained mechanical stress, which may be provided in the course of manufacture thereof, and may be relieved for...
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4778552 |
Alarm tag and method of making and deactivating it
This invention relates to a deactivatable tag useable with an electronic article surveillance system and comprised of planar conductive material cut into a pair of inverse, first and second spiral...
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4779076 |
Deactivatable coded marker and magnetic article surveillance system
A deactivatable coded marker for use in article surveillance systems has a core of soft magnetic material. An electrically conductive element at least partly surrounds the core, by reason of which...
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4752758 |
Demagnetization apparatus for magnetic markers used with article surveilliance systems
A demagnetization apparatus for use with magnetically based electronic article surveillance systems having a dual status anti-theft marker containing at least one demagnetizable control element...
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4745401 |
RF reactivatable marker for electronic article surveillance system
A marker for use in radio frequency electronic article surveillance systems where the marker contains an inductive-capacitive resonant circuit and is made reversibly deactivatable and reactivatable...
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4733215 |
Remote control apparatus for a property protection device
Apparatus for automatic and semiautomatic remote control of an antitheft protection device of a property is provided. In the automatic embodiment, the apparatus includes a portable transmitter...
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4728938 |
Security tag deactivation system
Security tags which bear a resonant circuit made of conductors on opposite sides of a dielectric are deactivated by applying to a tag sufficiently high RF power at the resonance frequency to...
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4689590 |
Demagnetization apparatus for magnetic markers used with electromagnetic article surveillance systems
A demagnetization apparatus for use with magnetically based electronic article surveillance systems having a dual status anti-theft marker containing at least one demagnetizable control element...
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4686516 |
Method, system and apparatus for use in article surveillance
An electronic surveillance system marker comprises an active component responsive to incident magnetic energy for causing an associated article surveillance system to render an output alarm and...
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4684930 |
Method and apparatus for deactivating targets used in electromagnetic type article surveillance systems
A deactivator for deactivating targets used in electromagnetic article surveillance systems comprises a solid element with a convexly curved outer surface, e.g., a cylinder and a plurality of...
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4682154 |
Label for use in anti-theft surveillance system
Permanently magnetized members (24, 26) of a surveillance system label (16) are disposed adjacent a ferromagnetic nonlinear element (30) for biasing the hysteresis loop of the nonlinear element...
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4673923 |
Article surveillance using reactivatable resonant tags
A resonant circuit-bearing tag, which is capable of causing an article protection system to give an alarm, is provided with a release liner surface. To permit removal of an article to which the tag...
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RE32428 |
Amorphous antipilferage marker
A magnetic theft detection system marker is adapted to generate magnetic fields at frequencies that (1) are harmonically related to an incident magnetic field applied within an interrogation zone...
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4665387 |
Method and apparatus for target deactivation and reactivation in article surveillance systems
Targets (14) mounted on objects (12) for detection by a magnetic type theft detection system are deactivated in a target deactivator (26,64) which has magnet assembly (40,72) made up of spaced...
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4622543 |
Surveillance system having acoustic magnetomechanical marker
An article surveillance system having an acoustic magnetomechanical marker is adapted, when armed, to resonate at a frequency provided by an incident magnetic field applied within an interrogation...
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4575624 |
Arrangement for activating and/or deactivating a marker strip having a magnetizable layer
A portable device for deactivating and/or activating a magnetizable layer forming part of a marker strip of an antishoplifting system. The device includes an electro-optical reading head for...
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4574274 |
Non-contact electrostatic deactivator
A low current electrostatic generator powers an electrode that, when proximate to the non-conductive outer surface of a surveillance tag, causes an electrostatic discharge to pass through such...
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4568921 |
Theft detection apparatus and target and method of making same
Items of merchandise (30) are protected from shoplifting or theft by affixing to them, special responder targets (32), which are formed by drawing a material of high magnetic permeability into a...
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4567473 |
Resonant tag and deactivator for use in an electronic security system
A resonant tag circuit having at least one resonant frequency is operative in an electronic security system in which the tag circuit is sensed and electronically deactivated to destroy the resonant...
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4499444 |
Desensitizer for ferromagnetic markers used with electromagnetic article surveillance systems
A desensitizer apparatus for use with magnetically based electronic article surveillance systems having a marker containing at least one magnetizable section which when magnetized, alters the...
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4318090 |
Apparatus for deactivating a surveillance tag
A pulse source powers a wand-like probe with spaced contacts that is arranged to be applied to and drawn along the surface of a surveillance tag that contains a diode semiconductor with exposed...
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4284985 |
Stolen equipment recovery device
A method and necessary apparatus for detecting the unauthorized operation or asportation of mobile or portable equipment. The apparatus comprises a concealable transmitter designed to re-transmit a...
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4151405 |
Ferromagnetic marker pairs for detecting objects having marker secured thereto, and method and system for activating, deactivating and using same
An activatable, and deactivatable ferromagnetic marker useful in tagging objects to permit selective detection of tagged objects depending upon the activation state of the marker. The marker...
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3983552 |
Pilferage detection systems
In a pilferage detection system employing apparatus for generating a magnetic field of alternating polarity and predetermined fundamental frequency through which articles subject to pilferage must...
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3938944 |
Electric ignition assembly
An electric ignition assembly for a gas burner employs a resistance igniter element which is surrounded by a hood having an opening. A stream containing fuel is directed through the opening and...
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3938044 |
Antenna apparatus for an electronic security system
For use in an electronic security system wherein a resonant tag circuit is sensed to denote an alarm condition, an antenna system which senses the presence of a resonant tag circuit and, upon such...
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3938125 |
Antipilferage system and marker therefor
An antipilferage system utilizing markers comprising a sheet having both ferromagnetic and electrically conductive characteristics, which markers are detected upon passage through an interrogation...
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3863244 |
ELECTRONIC SECURITY SYSTEM HAVING IMPROVED NOISE DISCRIMINATION
An electronic security system adapted for use in a controlled area such as a retail store and employing a multi-frequency resonant tag circuit having distinct frequencies for detection and...
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3859652 |
METHOD AND APPARATUS FOR DETECTING THE THEFT OF ARTICLES
The theft of articles or goods maintained in a vending place such as a department store having at least one exit passageway is prevented by affixing thereto a preferably small detection element...
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3810147 |
ELECTRONIC SECURITY SYSTEM
An electronic security system especially adapted for use in retail stores and employing a multi-frequency resonant tag circuit having distinct frequencies for detection and deactivation. A...
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3765007 |
METHOD AND APPARATUS FOR DETECTING AT A DISTANCE THE STATUS AND IDENTITY OF OBJECTS
A non-contact system for distinguishing the presence, identity or status of an object and markers for use therein. The system comprises a marker including a ferromagnetic material to accompany each...
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3754226 |
CONDUCTIVE-RING FERROMAGNETIC MARKER AND METHOD AND SYSTEM FOR USING SAME
A ferromagnetic marker is used in tagging objects to allow selective detection of the tagged objects within an interrogation zone having a magnetic field varying at a fundamental frequency. The...
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3747086 |
DEACTIVATABLE FERROMAGNETIC MARKER FOR DETECTION OF OBJECTS HAVING MARKER SECURED THERETO AND METHOD AND SYSTEM OF USING SAME
A deactivatable ferromagnetic marker useful in tagging objects to allow selective detection of tagged objects depending upon the activation state of the marker. The marker comprises a plurality of...
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3740742 |
METHOD AND APPARATUS FOR ACTUATING AN ELECTRIC CIRCUIT
A field of electrostatic, electromagnetic or high frequency radiant energy is provided on a predetermined intermittent cycle in a confined space through which persons are directed. A tuned resonant...
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3725895 |
STOLEN ARTICLE DETECTION
A method and system for detecting stolen articles such as by shoplifting. Articles in a store and the like are sprayed with a non-toxic, humanly undetectable aerosol which is subject, being highly...
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3711848 |
METHOD OF AND APPARATUS FOR THE DETECTION OF STOLEN ARTICLES
A system for detecting the unauthorized removal of protected articles from a designated area comprising a harmonic generator circuit made up of a semiconductor diode chip and a pair of antennas...
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3665449 |
METHOD AND APPARATUS FOR DETECTING AT A DISTANCE THE STATUS AND IDENTITY OF OBJECTS
A non-contact method of and system for distinguishing the presence, identity or status of an object. The system comprises a marker including a ferro-magnetic material to accompany each object to be...
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3631442 |
ANTI-SHOPLIFTING SYSTEM
Article theft detection system wherein a passive nonlinear radio transponder is attached to each article to be protected, and an exit way is monitored by a loop antenna which is energized by...
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3624631 |
PILFERAGE CONTROL SYSTEM
An antipilferage system comprising a cooperating radio frequency transmitter and receiver pair. The transmitter directs swept radio frequency energy to the cooperating receiver circuit wherein...
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3609741 |
PREVENTION OF UNAUTHORIZED MOVEMENT OF ARTICLES BETWEEN PREDETERMINED AREAS
A system for indicating an attempt to move an article, such as a piece of baggage or an article of merchandise, between predetermined areas, by providing a radio transmitter and radio receiver...
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3493955 |
METHOD AND APPARATUS FOR DETECTING THE UNAUTHORIZED MOVEMENT OF ARTICLES
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