CA1113576A - Antipilferage system utilizing "figure-8" shaped field producing and detector coils - Google Patents

Antipilferage system utilizing "figure-8" shaped field producing and detector coils

Info

Publication number
CA1113576A
CA1113576A CA302,182A CA302182A CA1113576A CA 1113576 A CA1113576 A CA 1113576A CA 302182 A CA302182 A CA 302182A CA 1113576 A CA1113576 A CA 1113576A
Authority
CA
Canada
Prior art keywords
coils
field
detector
field producing
coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA302,182A
Other languages
English (en)
French (fr)
Inventor
Eugene C. Heltemes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of CA1113576A publication Critical patent/CA1113576A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2474—Antenna or antenna activator geometry, arrangement or layout

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
CA302,182A 1977-05-24 1978-04-27 Antipilferage system utilizing "figure-8" shaped field producing and detector coils Expired CA1113576A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US799,976 1977-05-24
US05/799,976 US4135183A (en) 1977-05-24 1977-05-24 Antipilferage system utilizing "figure-8" shaped field producing and detector coils

Publications (1)

Publication Number Publication Date
CA1113576A true CA1113576A (en) 1981-12-01

Family

ID=25177202

Family Applications (1)

Application Number Title Priority Date Filing Date
CA302,182A Expired CA1113576A (en) 1977-05-24 1978-04-27 Antipilferage system utilizing "figure-8" shaped field producing and detector coils

Country Status (8)

Country Link
US (1) US4135183A (en, 2012)
JP (1) JPS53145600A (en, 2012)
AU (1) AU520720B2 (en, 2012)
CA (1) CA1113576A (en, 2012)
DE (1) DE2823191A1 (en, 2012)
FR (1) FR2392456A1 (en, 2012)
GB (1) GB1599138A (en, 2012)
NL (1) NL191960C (en, 2012)

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ITAR20000040A1 (it) * 2000-09-08 2002-03-08 Alessandro Manneschi Trasduttore lettore di transponder per il controllo dei passaggi
DE60232652D1 (de) * 2001-05-04 2009-07-30 Nxp Bv Kommunikationsgerät mit spulenkonfiguration zur kommunikation mit stationären datenträgern
US8148989B2 (en) * 2002-03-11 2012-04-03 Keith Kopp Ferromagnetic detection enhancer compatible with magnetic resonance
US7239134B2 (en) 2003-01-17 2007-07-03 Mednovus, Inc. Screening method and apparatus
US7154266B2 (en) * 2003-01-17 2006-12-26 Quantum Magnetics, Inc. Screening method and apparatus
US7315166B2 (en) * 2003-01-17 2008-01-01 Mednovus, Inc. Magnetic resonance imaging screening method and apparatus
US7834816B2 (en) * 2003-07-25 2010-11-16 Sensormatic Electronics Llc Apparatus for and method of using a diversity antenna
US20100182149A1 (en) * 2004-05-18 2010-07-22 Marino Ronald A Apparatus for and method of using rfid antenna configurations
US20060022670A1 (en) * 2004-07-31 2006-02-02 Mednovus, Inc. Magnetic resonance screening portal with combination sensing
US7591415B2 (en) * 2004-09-28 2009-09-22 3M Innovative Properties Company Passport reader for processing a passport having an RFID element
US20060139025A1 (en) * 2004-12-24 2006-06-29 Mednovus, Inc. Saturation-resistant magnetoresistive sensor for ferromagnetic screening
US7295107B2 (en) * 2004-12-30 2007-11-13 Mednovus, Inc. Ferromagnetic detection pillar
US20060145691A1 (en) * 2004-12-30 2006-07-06 Mednovus, Inc. Ferromagnetic detection pillar and variable aperture portal
US20060279406A1 (en) * 2005-06-07 2006-12-14 Robert Stewart Synchronization and adaptive timing method for multiple RFID reader system
US20070057786A1 (en) * 2005-09-13 2007-03-15 Mednovus, Inc. Ferromagnetic threat warning system
US7733290B2 (en) * 2005-12-19 2010-06-08 Sensormatic Electronics, LLC Merchandise surveillance system antenna and method
US20070252001A1 (en) * 2006-04-25 2007-11-01 Kail Kevin J Access control system with RFID and biometric facial recognition
US20080281187A1 (en) * 2006-10-18 2008-11-13 Mednovus, Inc. Ferromagnetic threat detection method apparatus
US8933790B2 (en) * 2007-06-08 2015-01-13 Checkpoint Systems, Inc. Phase coupler for rotating fields
MX2009013306A (es) * 2007-06-08 2010-02-15 Checkpoint Systems Inc Sistema y metodo de deteccion de eas dinamica.
JP4539699B2 (ja) * 2007-09-19 2010-09-08 富士ゼロックス株式会社 携行物管理ゲート
JP2010276351A (ja) * 2009-05-26 2010-12-09 Gunze Ltd 磁性物体検出装置
DE102010027639B4 (de) 2010-07-19 2023-03-30 Sew-Eurodrive Gmbh & Co Kg Spuleneinrichtung und Spulenanordnung
US8763914B2 (en) 2012-01-17 2014-07-01 On Track Innovations Ltd. Decoupled contactless bi-directional systems and methods
DE202012008852U1 (de) 2012-09-17 2013-12-18 Checkpoint Systems, Inc. Antennenvorrichtung
CN105632743B (zh) * 2016-03-25 2019-01-29 东莞市华盾电子科技有限公司 一种用于通过式探测器的线圈结构及其构成的探测器
CN105609278A (zh) * 2016-03-25 2016-05-25 东莞市华盾电子科技有限公司 用于通过式探测器的线圈结构及其构成的通过式探测器
CN105702442A (zh) * 2016-03-25 2016-06-22 东莞市华盾电子科技有限公司 用于探测器的线圈结构及其构成的通过式探测器
CN106710855B (zh) * 2017-02-09 2024-06-04 东莞市华盾电子科技有限公司 通过式探测器的线圈结构及通过式探测器
CN106710856B (zh) * 2017-02-10 2024-06-07 东莞市华盾电子科技有限公司 通过式探测器的线圈结构及通过式探测器
CN114994773A (zh) * 2022-05-06 2022-09-02 东莞市华盾电子科技有限公司 一种通过式探测器的线圈结构及通过式探测器
CN115061209A (zh) * 2022-05-06 2022-09-16 东莞市华盾电子科技有限公司 一种通过式探测器的线圈结构及通过式探测器

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FR763681A (fr) 1933-11-10 1934-05-04 Procédé de repérage des objets par modification d'un champ magnétique
US3747086A (en) * 1968-03-22 1973-07-17 Shoplifter International Inc Deactivatable ferromagnetic marker for detection of objects having marker secured thereto and method and system of using same
US3790945A (en) * 1968-03-22 1974-02-05 Stoplifter Int Inc Open-strip ferromagnetic marker and method and system for using same
DE2065827C3 (de) * 1969-07-11 1984-08-23 Minnesota Mining And Manufacturing Co., Saint Paul, Minn. Einrichtung zum Erzeugen einer Anzahl elektromagnetischer Felder in einer Abfragezone
US3665449A (en) * 1969-07-11 1972-05-23 Minnesota Mining & Mfg Method and apparatus for detecting at a distance the status and identity of objects
US3765007A (en) * 1969-07-11 1973-10-09 Minnesota Mining & Mfg Method and apparatus for detecting at a distance the status and identity of objects
US3697996A (en) * 1969-07-11 1972-10-10 Minnesota Mining & Mfg Electromagnetic field producing apparatus and method for sequentially producing a plurality of fields
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US3820104A (en) * 1972-12-15 1974-06-25 Stop Loss Inc Method and system for detecting an object within a magnetic field interrogation zone
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US3990065A (en) * 1975-02-20 1976-11-02 The Magnavox Company Theft detection system

Also Published As

Publication number Publication date
NL7805433A (nl) 1978-11-28
GB1599138A (en) 1981-09-30
DE2823191A1 (de) 1978-11-30
FR2392456B1 (en, 2012) 1984-08-10
FR2392456A1 (fr) 1978-12-22
JPS53145600A (en) 1978-12-18
NL191960B (nl) 1996-07-01
NL191960C (nl) 1996-11-04
DE2823191C2 (en, 2012) 1989-01-12
JPS6144359B2 (en, 2012) 1986-10-02
US4135183A (en) 1979-01-16
AU520720B2 (en) 1982-02-25
AU3637278A (en) 1979-11-29

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Legal Events

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MKEX Expiry