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 SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL 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 (enExample)
DE (1) DE2035356C3 (enExample)
FR (1) FR2055019A5 (enExample)
GB (1) GB1330481A (enExample)
HK (1) HK36077A (enExample)
NL (2) NL177945C (enExample)
SE (1) SE377387B (enExample)

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 (enExample) * 1971-11-29 1975-08-29 See International
US4134538A (en) * 1976-03-18 1979-01-16 La Societe Metalimphy Process and apparatus for identification of objects
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
NL177945C (nl) 1985-12-16
NL177945B (nl) 1985-07-16
FR2055019A5 (enExample) 1971-05-07
DE2035356B2 (de) 1977-06-08
JPS511400B1 (enExample) 1976-01-16
NL8401703A (nl) 1984-09-03
SE377387B (enExample) 1975-06-30
NL7010224A (enExample) 1971-01-13
DE2035356A1 (de) 1971-02-04
DE2035356C3 (de) 1984-06-28
HK36077A (en) 1977-07-15
NL180359C (nl) 1987-02-02

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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