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GB2050765B - Surveilance systems - Google Patents

Surveilance systems

Info

Publication number
GB2050765B
GB2050765B GB8016349A GB8016349A GB2050765B GB 2050765 B GB2050765 B GB 2050765B GB 8016349 A GB8016349 A GB 8016349A GB 8016349 A GB8016349 A GB 8016349A GB 2050765 B GB2050765 B GB 2050765B
Authority
GB
United Kingdom
Prior art keywords
surveilance
systems
surveilance systems
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
GB8016349A
Other versions
GB2050765A (en
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.)
Parmeko Ltd
Original Assignee
Parmeko Ltd
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 Parmeko Ltd filed Critical Parmeko Ltd
Priority to GB8016349A priority Critical patent/GB2050765B/en
Publication of GB2050765A publication Critical patent/GB2050765A/en
Application granted granted Critical
Publication of GB2050765B publication Critical patent/GB2050765B/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
    • G08B13/2405—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
    • G08B13/2431—Tag circuit 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
    • G08B13/2477—Antenna or antenna activator circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Burglar Alarm Systems (AREA)
GB8016349A 1979-05-18 1980-05-16 Surveilance systems Expired GB2050765B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8016349A GB2050765B (en) 1979-05-18 1980-05-16 Surveilance systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7917347 1979-05-18
GB8016349A GB2050765B (en) 1979-05-18 1980-05-16 Surveilance systems

Publications (2)

Publication Number Publication Date
GB2050765A GB2050765A (en) 1981-01-07
GB2050765B true GB2050765B (en) 1983-04-20

Family

ID=26271570

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8016349A Expired GB2050765B (en) 1979-05-18 1980-05-16 Surveilance systems

Country Status (1)

Country Link
GB (1) GB2050765B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679035A (en) * 1985-07-30 1987-07-07 Sensormatic Electronics Corporation Tri-signal electromagnetic article surveillance system
US4859991A (en) * 1987-08-28 1989-08-22 Sensormatic Electronics Corporation Electronic article surveillance system employing time domain and/or frequency domain analysis and computerized operation

Also Published As

Publication number Publication date
GB2050765A (en) 1981-01-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee