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FR763681A - Method of locating objects by modifying a magnetic field - Google Patents

Method of locating objects by modifying a magnetic field

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Publication number
FR763681A
FR763681AFR763681DAFR763681AFR 763681 AFR763681 AFR 763681AFR 763681D AFR763681D AFR 763681DAFR 763681 AFR763681 AFR 763681A
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FR
France
Prior art keywords
modifying
magnetic field
locating objects
locating
objects
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
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French (fr)
Inventor
Picard
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 filedfiledCritical
Application grantedgrantedCritical
Publication of FR763681ApublicationCriticalpatent/FR763681A/en
Expiredlegal-statusCriticalCurrent

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FR763681D1933-11-101933-11-10 Method of locating objects by modifying a magnetic fieldExpiredFR763681A (en)

Applications Claiming Priority (1)

Application NumberPriority DateFiling DateTitle
FR763681T1933-11-10

Publications (1)

Publication NumberPublication Date
FR763681Atrue FR763681A (en)1934-05-04

Family

ID=9180749

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FR763681DExpiredFR763681A (en)1933-11-101933-11-10 Method of locating objects by modifying a magnetic field

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FR (1)FR763681A (en)

Cited By (71)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US3184730A (en)*1962-07-301965-05-18Robert H IrishIntrusion detection system
US3500373A (en)*1966-05-061970-03-10Nat Bank Of North America TheMethod and apparatus for article theft detection
DE2035356A1 (en)*1969-07-111971-02-04Minnesota Mining & Mfg Method and device for determining the condition and identity of objects
US3631442A (en)*1968-03-221971-12-28Robert E FearonAnti-shoplifting system
US3665449A (en)*1969-07-111972-05-23Minnesota Mining & MfgMethod and apparatus for detecting at a distance the status and identity of objects
FR2161773A1 (en)*1971-11-291973-07-13See International
US3765007A (en)*1969-07-111973-10-09Minnesota Mining & MfgMethod and apparatus for detecting at a distance the status and identity of objects
DE2065828A1 (en)*1969-07-111976-08-05Minnesota Mining & MfgHighly permeable tracer element - is ferromagnetic and of elongated form to facilitate detection of object in surveillance zone
DE2065827A1 (en)*1969-07-111976-08-12Minnesota Mining & MfgElectromagnetic field generation in interrogation zone - uses several field generating devices and means for successive application of electrical energy
US3983552A (en)1975-01-141976-09-28American District Telegraph CompanyPilferage detection systems
US3990065A (en)*1975-02-201976-11-02The Magnavox CompanyTheft detection system
US4016553A (en)1975-06-271977-04-05Knogo CorporationArticle detection system with near field electromagnetic wave control
US4063229A (en)*1967-03-301977-12-13Sensormatic Electronics CorporationArticle surveillance
DE2732167A1 (en)*1976-07-151978-01-26Minnesota Mining & Mfg MARKER FOR THE PREVENTION OF THEFT AND METHOD FOR MANUFACTURING THE MARKER
US4074249A (en)1977-02-041978-02-14Knogo CorporationMagnetic detection means
DE2737129A1 (en)*1976-08-181978-02-23Knogo Corp METHOD AND DEVICE FOR INCREASING THE SELECTIVE RESPONSE TO HARMONICS IN AN OBJECT DETECTOR SYSTEM
USRE29610E (en)*1973-04-131978-04-11Knogo CorporationField strength uniformity control system
US4095214A (en)*1976-06-171978-06-13Knogo CorporationElectronic monitoring system and responder device
US4118693A (en)*1977-05-091978-10-03Knogo CorporationMethod and apparatus for producing uniform electromagnetic fields in an article detection system
DE2823191A1 (en)*1977-05-241978-11-30Minnesota Mining & Mfg IMPROVED SYSTEM FOR THEFT PROTECTION WITH EIGHT-SHAPED FIELD AND DETECTOR COILS
US4135184A (en)*1977-08-311979-01-16Knogo CorporationElectronic theft detection system for monitoring wide passageways
FR2427697A1 (en)*1978-02-171979-12-28Lichtblau George ANTENNA FOR GOODS THEFT DETECTION INSTALLATION
US4309697A (en)*1980-10-021982-01-05Sensormatic Electronics CorporationMagnetic surveillance system with odd-even harmonic and phase discrimination
FR2512558A1 (en)*1981-09-101983-03-11Sensormatic Electronics Corp ELECTRICAL MONITORING APPARATUS WITH MOBILE ANTENNA ELEMENTS
US4384281A (en)*1980-10-311983-05-17Knogo CorporationTheft detection apparatus using saturable magnetic targets
WO1983002027A1 (en)*1981-11-241983-06-09Myong ShinAntitheft system
WO1983003203A1 (en)*1982-03-151983-09-29Progressive DynamicsMethod and apparatus for theft detection systems
EP0121649A1 (en)*1983-02-041984-10-17Allied CorporationAmorphous antipilferage marker
DE2066151C2 (en)*1969-07-111985-02-28Minnesota Mining And Manufacturing Co., Saint Paul, Minn. Marking element for use in a device for detecting an object in an interrogation zone
EP0134404A1 (en)*1983-07-131985-03-20Knogo CorporationMethod and apparatus for target deactivation and reactivation
US4510489A (en)*1982-04-291985-04-09Allied CorporationSurveillance system having magnetomechanical marker
US4510490A (en)*1982-04-291985-04-09Allied CorporationCoded surveillance system having magnetomechanical marker
DE3419785A1 (en)*1983-10-201985-05-09Sigma Security Inc., Toronto, Ontario PEDESTAL SECURITY SYSTEM
EP0078401B1 (en)*1981-11-021985-08-07Allied CorporationAmorphous antipilferage marker
US4535323A (en)*1982-03-151985-08-13Progressive Dynamics, Inc.Preamplifying and signal processing method and apparatus for theft detection systems
DE3505052A1 (en)*1984-02-161985-08-22Sigma Security Inc., Toronto, Ontario PEDESTAL SECURITY SYSTEM
US4568921A (en)*1984-07-131986-02-04Knogo CorporationTheft detection apparatus and target and method of making same
US4623877A (en)1983-06-301986-11-18Knogo CorporationMethod and apparatus for detection of targets in an interrogation zone
US4642613A (en)*1984-03-161987-02-10Knogo CorporationElectronic theft detection apparatus with responder elements on protected articles
US4684930A (en)*1986-03-181987-08-04Knogo CorporationMethod and apparatus for deactivating targets used in electromagnetic type article surveillance systems
US4697170A (en)*1985-10-311987-09-29Minnesota Mining And Manufacturing CompanyMethod for minimizing false alarms and electronic noise in electronic article surveillance systems.
US4710754A (en)*1986-09-191987-12-01Minnesota Mining And Manufacturing CompanyMagnetic marker having switching section for use in electronic article surveillance systems
USRE32627E (en)*1981-09-101988-03-22Sensormatic Electronics CorporationElectrical surveillance apparatus with moveable antenna elements
US4746908A (en)*1986-09-191988-05-24Minnesota Mining And Manufacturing CompanyDual-status, magnetically imagable article surveillance marker
US4779076A (en)*1987-05-201988-10-18Controlled Information Corp.Deactivatable coded marker and magnetic article surveillance system
FR2619929A1 (en)*1987-08-281989-03-03Sensormatic Electronics Corp ELECTRONIC ARTICLE MONITORING SYSTEM
US4823113A (en)*1986-02-271989-04-18Allied-Signal Inc.Glassy alloy identification marker
US4825197A (en)*1988-02-011989-04-25Minnesota Mining And Manufacturing CompanyDual status magnetic marker having magnetically biasable flux collectors for us in electronic article surveillance systems
US4829288A (en)*1987-11-301989-05-09Minnesota Mining And Manufacturing CompanyEconomic, multi-directionally responsive marker for use in electronic article surveillance systems
DE3837129A1 (en)*1987-11-041989-05-18Sensormatic Electronics Corp MARKER FOR USE IN AN ARTICLE MONITORING SYSTEM AND METHOD FOR MANUFACTURING THE MARKER
US4857891A (en)*1988-04-291989-08-15Minnesota Mining And Manufacturing CompanyRandom-filament, multi-directionally responsive marker for use in electronic article surveillance systems
US4884063A (en)*1988-02-011989-11-28Minnesota Mining And Manufacturing CompanyDual status magnetic marker having magnetically biasable flux collectors for use in electronic article surveillance systems
EP0352513A3 (en)*1988-07-291990-09-19Knogo CorporationLoad isolated article surveillance system and antenna assembly
EP0387970A1 (en)*1989-03-171990-09-19N.V. Nederlandsche Apparatenfabriek NEDAPShoplifting detection system of the transmission type
US4967185A (en)*1989-08-081990-10-30Minnesota Mining And Manufacturing CompanyMulti-directionally responsive, dual-status, magnetic article surveillance marker having continuous keeper
US5146204A (en)*1990-03-131992-09-08Knogo CorporationTheft detection apparatus and flattened wire target and method of making same
US5288980A (en)*1992-06-251994-02-22Kingsley Library Equipment CompanyLibrary check out/check in system
US5405702A (en)*1993-12-301995-04-11Minnesota Mining And Manufacturing CompanyMethod for manufacturing a thin-film EAS and marker
US5432499A (en)*1993-05-271995-07-11Minnesota Mining And Manufacturing CompanyCollector type article surveillance marker with continuous keeper
USRE35042E (en)*1983-02-041995-09-26Allied CorporationAmorphous antipilferage marker
US5614824A (en)*1995-05-151997-03-25Crane & Co., Inc.Harmonic-based verifier device for a magnetic security thread having linear and non-linear ferromagnetic characteristics
EP0848356A1 (en)1996-12-121998-06-17Arjo Wiggins S.A.Substrate comprising magnetic particles, security document and method for detecting them
EP0848355A1 (en)1996-12-121998-06-17N.V. Bekaert S.A.Method and apparatus for detecting the presence of particles in a substrate
US5808466A (en)*1993-08-021998-09-15Azkoyen Industrial, S.A.Process and device for high speed measurement and characterization of magnetic materials
US5825291A (en)*1996-04-101998-10-20Sentry Technology CorporationElectronic article surveillance system
US5992741A (en)*1996-12-121999-11-30Robertson; Paul AndrewMagnetic detection of security articles
US6598793B1 (en)1996-12-122003-07-29N.V. Bekaert S.A.Article recognition and verification
DE3942722B4 (en)*1988-12-272005-05-12Pitney Bowes, Inc., Stamford Ferromagnetic fibers for use in electronic article surveillance and method of making the same
EP1715466A2 (en)2005-04-212006-10-25Micromag 2000, S.L.A magnetic tag that can be activated/deactivated based on magnetic microwire and a method for obtaining the same
EP1933286A2 (en)2006-12-152008-06-18Micromag 2000, S.L.Magnetoacustic markers based on magnetic microwire, and method of obtaining the same
US11023795B2 (en)2016-04-132021-06-01Universidad Complutense De MadridTag system and method for long-distance detection of objects

Cited By (86)

* Cited by examiner, † Cited by third party
Publication numberPriority datePublication dateAssigneeTitle
US3184730A (en)*1962-07-301965-05-18Robert H IrishIntrusion detection system
US3500373A (en)*1966-05-061970-03-10Nat Bank Of North America TheMethod and apparatus for article theft detection
US4063229A (en)*1967-03-301977-12-13Sensormatic Electronics CorporationArticle surveillance
US3631442A (en)*1968-03-221971-12-28Robert E FearonAnti-shoplifting system
US3665449A (en)*1969-07-111972-05-23Minnesota Mining & MfgMethod and apparatus for detecting at a distance the status and identity of objects
DE2066151C2 (en)*1969-07-111985-02-28Minnesota Mining And Manufacturing Co., Saint Paul, Minn. Marking element for use in a device for detecting an object in an interrogation zone
US3765007A (en)*1969-07-111973-10-09Minnesota Mining & MfgMethod and apparatus for detecting at a distance the status and identity of objects
DE2065828A1 (en)*1969-07-111976-08-05Minnesota Mining & MfgHighly permeable tracer element - is ferromagnetic and of elongated form to facilitate detection of object in surveillance zone
DE2065827A1 (en)*1969-07-111976-08-12Minnesota Mining & MfgElectromagnetic field generation in interrogation zone - uses several field generating devices and means for successive application of electrical energy
DE2035356A1 (en)*1969-07-111971-02-04Minnesota Mining & Mfg Method and device for determining the condition and identity of objects
FR2161773A1 (en)*1971-11-291973-07-13See International
USRE29610E (en)*1973-04-131978-04-11Knogo CorporationField strength uniformity control system
US3983552A (en)1975-01-141976-09-28American District Telegraph CompanyPilferage detection systems
US3990065A (en)*1975-02-201976-11-02The Magnavox CompanyTheft detection system
US4016553A (en)1975-06-271977-04-05Knogo CorporationArticle detection system with near field electromagnetic wave control
US4095214A (en)*1976-06-171978-06-13Knogo CorporationElectronic monitoring system and responder device
DE2732167A1 (en)*1976-07-151978-01-26Minnesota Mining & Mfg MARKER FOR THE PREVENTION OF THEFT AND METHOD FOR MANUFACTURING THE MARKER
US4075618A (en)*1976-07-151978-02-21Minnesota Mining And Manufacturing CompanyMagnetic asymmetric antipilferage marker
US4326198A (en)*1976-08-181982-04-20Knogo CorporationMethod and apparatus for the promotion of selected harmonic response signals in an article detection system
DE2737129A1 (en)*1976-08-181978-02-23Knogo Corp METHOD AND DEVICE FOR INCREASING THE SELECTIVE RESPONSE TO HARMONICS IN AN OBJECT DETECTOR SYSTEM
US4074249A (en)1977-02-041978-02-14Knogo CorporationMagnetic detection means
DE2820166A1 (en)*1977-05-091978-11-23Knogo Corp DEVICE FOR DETECTING GOODS PASSED BY UNAUTHORIZED AT A SURVEILLANCE POINT
FR2390784A1 (en)*1977-05-091978-12-08Knogo Corp THEFT PROTECTION DEVICE
US4118693A (en)*1977-05-091978-10-03Knogo CorporationMethod and apparatus for producing uniform electromagnetic fields in an article detection system
DE2823191A1 (en)*1977-05-241978-11-30Minnesota Mining & Mfg IMPROVED SYSTEM FOR THEFT PROTECTION WITH EIGHT-SHAPED FIELD AND DETECTOR COILS
FR2392456A1 (en)*1977-05-241978-12-22Minnesota Mining & Mfg ANTI-CHAPARDING INSTALLATION
US4135183A (en)1977-05-241979-01-16Minnesota Mining And Manufacturing CompanyAntipilferage system utilizing "figure-8" shaped field producing and detector coils
US4135184A (en)*1977-08-311979-01-16Knogo CorporationElectronic theft detection system for monitoring wide passageways
DE2837637A1 (en)*1977-08-311979-03-08Knogo Corp ELECTRONIC ANTI-THEFT SECURITY SYSTEM FOR MONITORING WIDE PASSAGE
FR2427697A1 (en)*1978-02-171979-12-28Lichtblau George ANTENNA FOR GOODS THEFT DETECTION INSTALLATION
FR2491631A1 (en)*1980-10-021982-04-09Sensormatic Electronics Corp MAGNETIC SURVEILLANCE APPARATUS WITH DISCRIMINATION OF IMPAIRS-PAIRS HARMONICS AND DISCRIMINATION OF PHASES.
US4309697A (en)*1980-10-021982-01-05Sensormatic Electronics CorporationMagnetic surveillance system with odd-even harmonic and phase discrimination
US4384281A (en)*1980-10-311983-05-17Knogo CorporationTheft detection apparatus using saturable magnetic targets
FR2512558A1 (en)*1981-09-101983-03-11Sensormatic Electronics Corp ELECTRICAL MONITORING APPARATUS WITH MOBILE ANTENNA ELEMENTS
DE3233028A1 (en)*1981-09-101983-03-24Sensormatic Electronics Corp., 33441 Deerfield Beach, Fla. ELECTRICAL MONITORING DEVICE WITH MOVABLE ANTENNA ELEMENTS
US4394645A (en)*1981-09-101983-07-19Sensormatic Electronics CorporationElectrical surveillance apparatus with moveable antenna elements
USRE32627E (en)*1981-09-101988-03-22Sensormatic Electronics CorporationElectrical surveillance apparatus with moveable antenna elements
EP0078401B1 (en)*1981-11-021985-08-07Allied CorporationAmorphous antipilferage marker
WO1983002027A1 (en)*1981-11-241983-06-09Myong ShinAntitheft system
WO1983003203A1 (en)*1982-03-151983-09-29Progressive DynamicsMethod and apparatus for theft detection systems
US4535323A (en)*1982-03-151985-08-13Progressive Dynamics, Inc.Preamplifying and signal processing method and apparatus for theft detection systems
US4510490A (en)*1982-04-291985-04-09Allied CorporationCoded surveillance system having magnetomechanical marker
US4510489A (en)*1982-04-291985-04-09Allied CorporationSurveillance system having magnetomechanical marker
US4553136A (en)*1983-02-041985-11-12Allied CorporationAmorphous antipilferage marker
USRE35042E (en)*1983-02-041995-09-26Allied CorporationAmorphous antipilferage marker
EP0121649A1 (en)*1983-02-041984-10-17Allied CorporationAmorphous antipilferage marker
EP0130286A3 (en)*1983-06-301988-03-02Knogo CorporationMethod and apparatus for detection of targets in an interrogation zone
US4623877A (en)1983-06-301986-11-18Knogo CorporationMethod and apparatus for detection of targets in an interrogation zone
EP0134404A1 (en)*1983-07-131985-03-20Knogo CorporationMethod and apparatus for target deactivation and reactivation
US4665387A (en)*1983-07-131987-05-12Knogo CorporationMethod and apparatus for target deactivation and reactivation in article surveillance systems
DE3419785A1 (en)*1983-10-201985-05-09Sigma Security Inc., Toronto, Ontario PEDESTAL SECURITY SYSTEM
DE3505052A1 (en)*1984-02-161985-08-22Sigma Security Inc., Toronto, Ontario PEDESTAL SECURITY SYSTEM
US4642613A (en)*1984-03-161987-02-10Knogo CorporationElectronic theft detection apparatus with responder elements on protected articles
US4568921A (en)*1984-07-131986-02-04Knogo CorporationTheft detection apparatus and target and method of making same
US4697170A (en)*1985-10-311987-09-29Minnesota Mining And Manufacturing CompanyMethod for minimizing false alarms and electronic noise in electronic article surveillance systems.
US4823113A (en)*1986-02-271989-04-18Allied-Signal Inc.Glassy alloy identification marker
US4684930A (en)*1986-03-181987-08-04Knogo CorporationMethod and apparatus for deactivating targets used in electromagnetic type article surveillance systems
US4710754A (en)*1986-09-191987-12-01Minnesota Mining And Manufacturing CompanyMagnetic marker having switching section for use in electronic article surveillance systems
US4746908A (en)*1986-09-191988-05-24Minnesota Mining And Manufacturing CompanyDual-status, magnetically imagable article surveillance marker
US4779076A (en)*1987-05-201988-10-18Controlled Information Corp.Deactivatable coded marker and magnetic article surveillance system
FR2619929A1 (en)*1987-08-281989-03-03Sensormatic Electronics Corp ELECTRONIC ARTICLE MONITORING SYSTEM
DE3837129A1 (en)*1987-11-041989-05-18Sensormatic Electronics Corp MARKER FOR USE IN AN ARTICLE MONITORING SYSTEM AND METHOD FOR MANUFACTURING THE MARKER
US4829288A (en)*1987-11-301989-05-09Minnesota Mining And Manufacturing CompanyEconomic, multi-directionally responsive marker for use in electronic article surveillance systems
US4884063A (en)*1988-02-011989-11-28Minnesota Mining And Manufacturing CompanyDual status magnetic marker having magnetically biasable flux collectors for use in electronic article surveillance systems
US4825197A (en)*1988-02-011989-04-25Minnesota Mining And Manufacturing CompanyDual status magnetic marker having magnetically biasable flux collectors for us in electronic article surveillance systems
US4857891A (en)*1988-04-291989-08-15Minnesota Mining And Manufacturing CompanyRandom-filament, multi-directionally responsive marker for use in electronic article surveillance systems
EP0352513A3 (en)*1988-07-291990-09-19Knogo CorporationLoad isolated article surveillance system and antenna assembly
US5121103A (en)*1988-07-291992-06-09Knogo CorporationLoad isolated article surveillance system and antenna assembly
DE3942722B4 (en)*1988-12-272005-05-12Pitney Bowes, Inc., Stamford Ferromagnetic fibers for use in electronic article surveillance and method of making the same
EP0387970A1 (en)*1989-03-171990-09-19N.V. Nederlandsche Apparatenfabriek NEDAPShoplifting detection system of the transmission type
US4967185A (en)*1989-08-081990-10-30Minnesota Mining And Manufacturing CompanyMulti-directionally responsive, dual-status, magnetic article surveillance marker having continuous keeper
US5146204A (en)*1990-03-131992-09-08Knogo CorporationTheft detection apparatus and flattened wire target and method of making same
US5288980A (en)*1992-06-251994-02-22Kingsley Library Equipment CompanyLibrary check out/check in system
US5432499A (en)*1993-05-271995-07-11Minnesota Mining And Manufacturing CompanyCollector type article surveillance marker with continuous keeper
US5808466A (en)*1993-08-021998-09-15Azkoyen Industrial, S.A.Process and device for high speed measurement and characterization of magnetic materials
US5405702A (en)*1993-12-301995-04-11Minnesota Mining And Manufacturing CompanyMethod for manufacturing a thin-film EAS and marker
US5614824A (en)*1995-05-151997-03-25Crane & Co., Inc.Harmonic-based verifier device for a magnetic security thread having linear and non-linear ferromagnetic characteristics
US5825291A (en)*1996-04-101998-10-20Sentry Technology CorporationElectronic article surveillance system
EP0848355A1 (en)1996-12-121998-06-17N.V. Bekaert S.A.Method and apparatus for detecting the presence of particles in a substrate
US5992741A (en)*1996-12-121999-11-30Robertson; Paul AndrewMagnetic detection of security articles
US6598793B1 (en)1996-12-122003-07-29N.V. Bekaert S.A.Article recognition and verification
EP0848356A1 (en)1996-12-121998-06-17Arjo Wiggins S.A.Substrate comprising magnetic particles, security document and method for detecting them
EP1715466A2 (en)2005-04-212006-10-25Micromag 2000, S.L.A magnetic tag that can be activated/deactivated based on magnetic microwire and a method for obtaining the same
US7852215B2 (en)2005-04-212010-12-14Micromag 2000, S.L.Magnetic tag that can be activated/deactivated based on magnetic microwire and a method for obtaining the same
EP1933286A2 (en)2006-12-152008-06-18Micromag 2000, S.L.Magnetoacustic markers based on magnetic microwire, and method of obtaining the same
US11023795B2 (en)2016-04-132021-06-01Universidad Complutense De MadridTag system and method for long-distance detection of objects

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