EP0655719A3 - Antenna element for anti-theft devices. - Google Patents

Antenna element for anti-theft devices. Download PDF

Info

Publication number
EP0655719A3
EP0655719A3 EP94120246A EP94120246A EP0655719A3 EP 0655719 A3 EP0655719 A3 EP 0655719A3 EP 94120246 A EP94120246 A EP 94120246A EP 94120246 A EP94120246 A EP 94120246A EP 0655719 A3 EP0655719 A3 EP 0655719A3
Authority
EP
European Patent Office
Prior art keywords
antenna element
theft devices
antennas
image
theft
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
EP94120246A
Other languages
German (de)
French (fr)
Other versions
EP0655719A2 (en
EP0655719B1 (en
Inventor
Bertil Holmgren
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.)
MW Trading ApS
Original Assignee
MW Trading ApS
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 MW Trading ApS filed Critical MW Trading ApS
Priority to AT94120246T priority Critical patent/ATE187833T1/en
Priority to DE1989629118 priority patent/DE68929118T2/en
Priority claimed from EP89906836A external-priority patent/EP0425515B1/en
Publication of EP0655719A2 publication Critical patent/EP0655719A2/en
Publication of EP0655719A3 publication Critical patent/EP0655719A3/en
Application granted granted Critical
Publication of EP0655719B1 publication Critical patent/EP0655719B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G08B13/2422—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 acoustic or microwave 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
    • G08B13/2434—Tag housing and attachment details

Abstract

An antenna element (33) for anti-theft devices (10, 11) of the type affecting a magnetic, acoustic or electromagnetic field, has two antennas (35) projecting from opposite sides of said element and forms together with said antennas a configuration similar to the letter S. <IMAGE> <IMAGE>
EP94120246A 1989-05-19 1989-05-19 Antenna element for anti-theft devices Expired - Lifetime EP0655719B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT94120246T ATE187833T1 (en) 1989-05-19 1989-05-19 ANTENNA ELEMENT FOR ANTI-THEFT DEVICES
DE1989629118 DE68929118T2 (en) 1989-05-19 1989-05-19 Antenna element for anti-theft devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89906836A EP0425515B1 (en) 1987-12-14 1989-05-19 Anti-theft device for spectacle frames

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP89906836.5 Division 1989-05-19
EP89906836A Division EP0425515B1 (en) 1987-12-14 1989-05-19 Anti-theft device for spectacle frames

Publications (3)

Publication Number Publication Date
EP0655719A2 EP0655719A2 (en) 1995-05-31
EP0655719A3 true EP0655719A3 (en) 1995-08-09
EP0655719B1 EP0655719B1 (en) 1999-12-15

Family

ID=8203393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94120246A Expired - Lifetime EP0655719B1 (en) 1989-05-19 1989-05-19 Antenna element for anti-theft devices

Country Status (2)

Country Link
EP (1) EP0655719B1 (en)
AT (1) ATE126379T1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002595A1 (en) * 1977-12-09 1979-06-27 Lintech Instruments Limited Transponders
US4413254A (en) * 1981-09-04 1983-11-01 Sensormatic Electronics Corporation Combined radio and magnetic energy responsive surveillance marker and system
US4642640A (en) * 1983-04-25 1987-02-10 Sensormatic Electronics Corporation Signal receptor-reradiator and surveillance tag using the same
US4736207A (en) * 1986-01-31 1988-04-05 Sensormatic Electronics Corporation Tag device and method for electronic article surveillance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002595A1 (en) * 1977-12-09 1979-06-27 Lintech Instruments Limited Transponders
US4413254A (en) * 1981-09-04 1983-11-01 Sensormatic Electronics Corporation Combined radio and magnetic energy responsive surveillance marker and system
US4642640A (en) * 1983-04-25 1987-02-10 Sensormatic Electronics Corporation Signal receptor-reradiator and surveillance tag using the same
US4736207A (en) * 1986-01-31 1988-04-05 Sensormatic Electronics Corporation Tag device and method for electronic article surveillance

Also Published As

Publication number Publication date
EP0655719A2 (en) 1995-05-31
EP0655719B1 (en) 1999-12-15
ATE126379T1 (en) 1995-08-15

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