AU1471983A - Method and apparatus for theft detection systems - Google Patents

Method and apparatus for theft detection systems

Info

Publication number
AU1471983A
AU1471983A AU14719/83A AU1471983A AU1471983A AU 1471983 A AU1471983 A AU 1471983A AU 14719/83 A AU14719/83 A AU 14719/83A AU 1471983 A AU1471983 A AU 1471983A AU 1471983 A AU1471983 A AU 1471983A
Authority
AU
Australia
Prior art keywords
detection systems
theft detection
theft
systems
detection
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.)
Granted
Application number
AU14719/83A
Other versions
AU562133B2 (en
Inventor
Larry Eccleston
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.)
Progressive Dynamics Inc
Original Assignee
Progressive Dynamics Inc
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
Priority claimed from US06/358,383 external-priority patent/US4524350A/en
Priority claimed from US06/358,299 external-priority patent/US4535323A/en
Application filed by Progressive Dynamics Inc filed Critical Progressive Dynamics Inc
Publication of AU1471983A publication Critical patent/AU1471983A/en
Application granted granted Critical
Publication of AU562133B2 publication Critical patent/AU562133B2/en
Anticipated expiration legal-status Critical
Ceased 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
AU14719/83A 1982-03-15 1983-03-10 Method and apparatus for theft detection systems Ceased AU562133B2 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US358383 1982-03-15
US06/358,383 US4524350A (en) 1982-03-15 1982-03-15 Detection logic and signal processing method and apparatus for theft detection systems
US06/358,299 US4535323A (en) 1982-03-15 1982-03-15 Preamplifying and signal processing method and apparatus for theft detection systems
US36426482A 1982-04-01 1982-04-01
US358299 1994-12-19
US364264 1994-12-27

Publications (2)

Publication Number Publication Date
AU1471983A true AU1471983A (en) 1983-10-24
AU562133B2 AU562133B2 (en) 1987-05-28

Family

ID=27408345

Family Applications (1)

Application Number Title Priority Date Filing Date
AU14719/83A Ceased AU562133B2 (en) 1982-03-15 1983-03-10 Method and apparatus for theft detection systems

Country Status (5)

Country Link
EP (1) EP0103629B1 (en)
AU (1) AU562133B2 (en)
CA (1) CA1217256A (en)
DE (1) DE3380326D1 (en)
WO (1) WO1983003203A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668942A (en) * 1984-11-19 1987-05-26 Progressive Dynamics, Inc. Signal analysis apparatus including recursive filter for electromagnetic surveillance system
US4888579A (en) * 1988-09-16 1989-12-19 Minnesota Mining And Manufacturing Company False alarm minimization and direction determination methods
US5748086A (en) * 1995-11-14 1998-05-05 Sensormatic Electronics Corporation Electronic article surveillance system with comb filtering and false alarm suppression
GB9915595D0 (en) * 1999-07-02 1999-09-01 Sadler Robin W Identification apparatus for reading moving tags in passageways
NZ566979A (en) 2005-09-20 2011-01-28 Allflex Australia Pty Ltd Animal portal with coil wound around and horizontal radiator elements to each side

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR763681A (en) * 1933-11-10 1934-05-04 Method of locating objects by modifying a magnetic field
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
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
US3740742A (en) * 1971-05-11 1973-06-19 T Thompson Method and apparatus for actuating an electric circuit
US3838409A (en) * 1973-04-13 1974-09-24 Knogo Corp Field strength uniformity control system for article theft detection system
US3983552A (en) * 1975-01-14 1976-09-28 American District Telegraph Company Pilferage detection systems
US4168496A (en) * 1977-10-05 1979-09-18 Lichtblau G J Quasi-stationary noise cancellation system
US4300183A (en) * 1980-03-27 1981-11-10 Richardson Robert H Method and apparatus for generating alternating magnetic fields to produce harmonic signals from a metallic strip
US4321586A (en) * 1980-08-21 1982-03-23 Knogo Corporation Article theft detection
US4309697A (en) * 1980-10-02 1982-01-05 Sensormatic Electronics Corporation Magnetic surveillance system with odd-even harmonic and phase discrimination

Also Published As

Publication number Publication date
DE3380326D1 (en) 1989-09-07
AU562133B2 (en) 1987-05-28
EP0103629B1 (en) 1989-08-02
WO1983003203A1 (en) 1983-09-29
CA1217256A (en) 1987-01-27
EP0103629A4 (en) 1987-03-12
EP0103629A1 (en) 1984-03-28

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