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SE9601358L - Method and apparatus for deactivating alarm elements - Google Patents

Method and apparatus for deactivating alarm elements

Info

Publication number
SE9601358L
SE9601358L SE9601358A SE9601358A SE9601358L SE 9601358 L SE9601358 L SE 9601358L SE 9601358 A SE9601358 A SE 9601358A SE 9601358 A SE9601358 A SE 9601358A SE 9601358 L SE9601358 L SE 9601358L
Authority
SE
Sweden
Prior art keywords
alarm element
deactivation
magnetic field
detection
essentially
Prior art date
Application number
SE9601358A
Other languages
Swedish (sv)
Other versions
SE9601358D0 (en
SE510118C2 (en
Inventor
Leif Goesta Aasbrink
Original Assignee
Leif Goesta Aasbrink
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 Leif Goesta Aasbrink filed Critical Leif Goesta Aasbrink
Priority to SE9601358A priority Critical patent/SE510118C2/en
Publication of SE9601358D0 publication Critical patent/SE9601358D0/en
Priority to PCT/SE1997/000605 priority patent/WO1997038405A1/en
Priority to CA 2251229 priority patent/CA2251229A1/en
Priority to EP97919858A priority patent/EP0892970A1/en
Priority to AU24192/97A priority patent/AU2419297A/en
Publication of SE9601358L publication Critical patent/SE9601358L/en
Publication of SE510118C2 publication Critical patent/SE510118C2/en

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
    • G08B13/2411—Tag deactivation

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)

Abstract

A method to deactivate a burglar proof system alarm element (1), the alarm element being adapted to be detected in an alternating magnetic field (2) in a scanning area (3) in the system, in that by means of a signal generator (4) provided in the alarm element it emits detectable signals (5) in said alternating field including a magnetization of a deactivator (4') thereby preventing the emission of said detectable signals. The method is especially characterized in that the deactivation of the alarm element (1) is achieved by means of a magnetizing impulse (11) directly in connection with a detection of the alarm element, the deactivation then being achieved by means of a magnetic field being essentially stronger than the magnetic field during the detection and with essentially the same direction. The invention is also related to a device for deactivation.
SE9601358A 1996-04-11 1996-04-11 Method and apparatus for deactivating alarm elements SE510118C2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9601358A SE510118C2 (en) 1996-04-11 1996-04-11 Method and apparatus for deactivating alarm elements
PCT/SE1997/000605 WO1997038405A1 (en) 1996-04-11 1997-04-10 A method and a device for deactivating an alarm element
CA 2251229 CA2251229A1 (en) 1996-04-11 1997-04-10 A method and a device for deactivating an alarm element
EP97919858A EP0892970A1 (en) 1996-04-11 1997-04-10 A method and a device for deactivating an alarm element
AU24192/97A AU2419297A (en) 1996-04-11 1997-04-10 A method and a device for deactivating an alarm element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9601358A SE510118C2 (en) 1996-04-11 1996-04-11 Method and apparatus for deactivating alarm elements

Publications (3)

Publication Number Publication Date
SE9601358D0 SE9601358D0 (en) 1996-04-11
SE9601358L true SE9601358L (en) 1997-10-12
SE510118C2 SE510118C2 (en) 1999-04-19

Family

ID=20402138

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9601358A SE510118C2 (en) 1996-04-11 1996-04-11 Method and apparatus for deactivating alarm elements

Country Status (5)

Country Link
EP (1) EP0892970A1 (en)
AU (1) AU2419297A (en)
CA (1) CA2251229A1 (en)
SE (1) SE510118C2 (en)
WO (1) WO1997038405A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498076A (en) * 1982-05-10 1985-02-05 Lichtblau G J Resonant tag and deactivator for use in an electronic security system
US4728938A (en) * 1986-01-10 1988-03-01 Checkpoint Systems, Inc. Security tag deactivation system
US5027106A (en) * 1989-12-27 1991-06-25 Checkpoint Systems, Inc. Method and apparatus for electronic article surveillance

Also Published As

Publication number Publication date
EP0892970A1 (en) 1999-01-27
SE9601358D0 (en) 1996-04-11
SE510118C2 (en) 1999-04-19
CA2251229A1 (en) 1997-10-16
WO1997038405A1 (en) 1997-10-16
AU2419297A (en) 1997-10-29

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