GB1330481A - Method and apparatus for detecting the status and identity of objects - Google Patents

Method and apparatus for detecting the status and identity of objects

Info

Publication number
GB1330481A
GB1330481A GB3368870A GB3368870A GB1330481A GB 1330481 A GB1330481 A GB 1330481A GB 3368870 A GB3368870 A GB 3368870A GB 3368870 A GB3368870 A GB 3368870A GB 1330481 A GB1330481 A GB 1330481A
Authority
GB
United Kingdom
Prior art keywords
field
coils
marker
ferromagnetic
fed
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
GB3368870A
Other languages
English (en)
Inventor
J T Elder
D A Whrigt
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
Priority to GB1599673A priority Critical patent/GB1330482A/en
Priority to GB1599770A priority patent/GB1330483A/en
Publication of GB1330481A publication Critical patent/GB1330481A/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
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2477—Antenna or antenna activator circuit
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • 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
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered 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
    • 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
    • G08B13/2428—Tag details
    • G08B13/2437—Tag layered structure, processes for making layered tags
    • G08B13/2442—Tag materials and material properties thereof, e.g. magnetic material details
    • 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)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Radar Systems Or Details Thereof (AREA)
GB3368870A 1969-07-11 1970-07-10 Method and apparatus for detecting the status and identity of objects Expired GB1330481A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1599673A GB1330482A (en) 1969-07-11 1970-07-10 Apparatus for detecting the status and identity of objects
GB1599770A GB1330483A (en) 1969-07-11 1970-07-10 Apparatus and marker for detecting the status and identity of objects

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US84097369A 1969-07-11 1969-07-11
US88587469A 1969-12-17 1969-12-17
US5084070A 1970-06-29 1970-06-29

Publications (1)

Publication Number Publication Date
GB1330481A true GB1330481A (en) 1973-09-19

Family

ID=27367841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3368870A Expired GB1330481A (en) 1969-07-11 1970-07-10 Method and apparatus for detecting the status and identity of objects

Country Status (7)

Country Link
JP (1) JPS511400B1 (enrdf_load_stackoverflow)
DE (1) DE2035356C3 (enrdf_load_stackoverflow)
FR (1) FR2055019A5 (enrdf_load_stackoverflow)
GB (1) GB1330481A (enrdf_load_stackoverflow)
HK (1) HK36077A (enrdf_load_stackoverflow)
NL (2) NL177945C (enrdf_load_stackoverflow)
SE (1) SE377387B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2247381B (en) * 1987-08-28 1992-08-05 Sensormatic Electronics Corp An electronic article surveillance system
US5541577A (en) * 1995-05-26 1996-07-30 Consolidated Graphic Materials, Inc. Electromagnetic asset protection system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2161773B1 (enrdf_load_stackoverflow) * 1971-11-29 1975-08-29 See International
JPS52129235A (en) * 1976-03-18 1977-10-29 Metalimphy Method and device for identifying article
NL7708012A (nl) * 1977-07-19 1979-01-23 Nedap Nv Detectiestelsel.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763681A (fr) * 1933-11-10 1934-05-04 Procédé de repérage des objets par modification d'un champ magnétique
US3292080A (en) * 1964-11-23 1966-12-13 Emmanuel M Trikilis System and method for preventing pilferage by detection of magnetic fields
US3500373A (en) 1966-05-06 1970-03-10 Nat Bank Of North America The Method and apparatus for article theft detection

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2247381B (en) * 1987-08-28 1992-08-05 Sensormatic Electronics Corp An electronic article surveillance system
US5541577A (en) * 1995-05-26 1996-07-30 Consolidated Graphic Materials, Inc. Electromagnetic asset protection system

Also Published As

Publication number Publication date
DE2035356C3 (de) 1984-06-28
DE2035356B2 (de) 1977-06-08
NL8401703A (nl) 1984-09-03
DE2035356A1 (de) 1971-02-04
HK36077A (en) 1977-07-15
NL7010224A (enrdf_load_stackoverflow) 1971-01-13
FR2055019A5 (enrdf_load_stackoverflow) 1971-05-07
SE377387B (enrdf_load_stackoverflow) 1975-06-30
NL177945B (nl) 1985-07-16
NL177945C (nl) 1985-12-16
JPS511400B1 (enrdf_load_stackoverflow) 1976-01-16
NL180359C (nl) 1987-02-02

Similar Documents

Publication Publication Date Title
US3665449A (en) Method and apparatus for detecting at a distance the status and identity of objects
US3765007A (en) Method and apparatus for detecting at a distance the status and identity of objects
US4413254A (en) Combined radio and magnetic energy responsive surveillance marker and system
US4967185A (en) Multi-directionally responsive, dual-status, magnetic article surveillance marker having continuous keeper
CA1245321A (en) Method, system and apparatus for use in article surveillance
US4660025A (en) Article surveillance magnetic marker having an hysteresis loop with large Barkhausen discontinuities
US4743890A (en) Deactivatable security label for anti-theft systems
CA1266900A (en) Apparatus and method for detecting a magnetic marker
CA1234891A (en) Security system label
EP0451812B1 (en) Electromagnetic sensor element and method for making same
US4158434A (en) Electronic status determining system for goods
AU560069B2 (en) Magnetomechanical surveillance marker
US4222517A (en) Magnetic marker
US3697996A (en) Electromagnetic field producing apparatus and method for sequentially producing a plurality of fields
JPS6383899A (ja) 電子物品監視システムに使用される二元状態マーカとその製造方法
JP2818716B2 (ja) 電子式物品監視システム用ターゲットの増感／減感装置と方法
GB1330481A (en) Method and apparatus for detecting the status and identity of objects
US3781661A (en) Magnetic material and method of producing same
GB1219480A (en) Method and device for detecting the presence of electrically conductive bodies
DE4200082A1 (de) Vorrichtung und verfahren zum erkennen eines magnetisierbaren markierungselementes
US5304983A (en) Multiple pulse responder and detection system and method of making and using same
US3896372A (en) Magnetic sensing detection system and method
JPH02260098A (ja) 商品監視システム、ケースおよび被検出手段の活性化・非活性化方式
US5246522A (en) Method of making deactivatable electronic article surveillance markers
WO1984002789A1 (en) Anti-shoplifting system

Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414B Case decided by the comptroller ** grants allowed (sect. 14/1949)
PS Patent sealed
PE20 Patent expired after termination of 20 years