Sensormatic Electronics Corporation

Tyco Fire + Security Gmbh

William M Farrell

Stewart E Hall

Richard Loyd Copeland

Brent F Balch

Hubert A Patterson

Paul B Rasband

Nancy Lee Van Nest

Stanley A Strzelec

Steven W Embling

A method and system for activating an EAS element deactivator is provided. At a computer, item data including a physical attribute of an item is received. A determination is made as to whether the item data corresponds to a purchased item in a purchase receipt. When it is determined that the item data corresponds to the purchased item, EAS element deactivator is activated for use.

Electronic article surveillance tagged item validation prior to deactivation

A magnetic core transceiver antenna for EAS marker detection is provided. The core includes a stack of amorphous alloy ribbons insulated from each other and laminated together. A coil winding of wire, also insulted from the ribbons, and connected to an electronic controller provides the transmitter and receiver modes. The transceiver antenna is optimized for the dual mode operation, and is smaller and uses less power than conventional air-core EAS antennas with equivalent performance. Complex core geometries, such as a sandwiched stack of different sized ribbons, can be implemented to vary the effective permeability of the core to customize antenna performance. Multiple transceiver antennas can be combined to increase the size of the generated EAS interrogation zone.

Magnetic core transceiver for electronic article surveillance marker detection

An electronic article surveillance antenna system with wide interrogation zones has a number of core transceiver antennas with each connectable to a transmitter. The core transceiver antennas are adapted to be installed adjacent a ceiling of the wide interrogation zone and generate an interrogation signal into the wide interrogation zone. The core transceiver antennas each are connectable to a receiver to receive and detect a response signal from an electronic surveillance marker disposed in the wide interrogation zone. The system also has transceiver antenna coils with each connectable to the transmitter and adapted to be installed adjacent a floor of the wide interrogation zone. The transceiver antenna coils generate the interrogation signal into the wide interrogation zone and each is also connectable to the receiver to receive and detect the response signal from the electronic surveillance marker disposed in the wide interrogation zone.

Wide exit/entrance electronic article surveillance antenna system

An electronic article surveillance (EAS) antenna system including at least one transmit antenna and at least one amorphous core receiver antenna adapted for installation on the floor, in the grout region of the floor, or under the flooring of a passageway. An EAS system including at least one perimeter loop antenna adapted to extend around the entire perimeter of a passageway is also provided. The system may further include at least one floor antenna adapted for installation within a region of a floor of a passageway and at least one ceiling antenna adapted for installation adjacent a ceiling of the passageway.

Wide exit electronic article surveillance antenna system

A core antenna system for use in electronic article surveillance (EAS) and radio frequency identification (RFID) systems. The core antenna system may include a core antenna. The core antenna may include a core, a first resonant winding disposed around at least a portion of the core, the first resonant winding having a first number of winding turns N, and a second non-resonant winding disposed around at least a portion of the core, the second non-resonant winding having a second number of winding turns N, the second number of turns greater than or equal to the first number of turns. The core antenna may be mounted on a shield plate and tuned to an operating frequency on the shield plate such that when the shielded core antenna is further mounted on a mounting surface, e.g., of a checkstand, no significant de-tuning of the antenna takes place.

Core antenna for EAS and RFID applications

A magnetic core antenna system including a magnetic core and a winding network. The winding network may be configured with a non-uniform ampere-turn distribution to achieve a desired flux density in the core. The network may include a plurality of windings configured to provide a winding impedance facilitating optimal transmitter power delivery to the windings. A magnetic core may be constructed from multiple components having longitudinal contact surfaces and joined by a transverse clamping force. An air gap may be provided between the components to allow relative movement therebetween.

High efficiency core antenna and construction method

An electronic article surveillance antenna system for wide exit interrogation zones is provided. In a first aspect, a first and a second transmit antenna, each adapted for installation on opposite sides of a wide interrogation zone. A third transmit antenna is adapted for installation adjacent the ceiling of the wide interrogation zone. The first, second, and third transmit antennas are connectable to a transmitter for generation of an interrogation signal for transmission into the wide interrogation zone. A plurality of amorphous core receiver antennas are adapted for installation in the grout region of a floor of the wide interrogation zone. The output of each of the plurality of amorphous core receiver antennas are connectable to a receiver for detection of a response signal from an electronic article surveillance tag disposed in the wide interrogation zone. The response signal is responsive to the interrogation signal. The plurality of amorphous core receiver antennas can be configured in a plurality of orthogonal pairs of amorphous core receiver antennas. In a second aspect, the transmit antennas are loop antennas and the receiver is comprised of a plurality of amorphous core receivers adapted for installation on opposite sides and the ceiling of the wide entrance.

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West Palm Beach, FL, United States of America

William M Farrell