GB1085704A - Apparatus for detecting an object - Google Patents

Apparatus for detecting an object

Info

Publication number
GB1085704A
GB1085704A GB4437364A GB4437364A GB1085704A GB 1085704 A GB1085704 A GB 1085704A GB 4437364 A GB4437364 A GB 4437364A GB 4437364 A GB4437364 A GB 4437364A GB 1085704 A GB1085704 A GB 1085704A
Authority
GB
United Kingdom
Prior art keywords
rim
disc
oct
card
division
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
GB4437364A
Inventor
Yehuda Klinger
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB4437364A priority Critical patent/GB1085704A/en
Publication of GB1085704A publication Critical patent/GB1085704A/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
    • G08B13/2414—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 inductive 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
    • G08B13/2465—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
    • 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)
  • Burglar Alarm Systems (AREA)

Abstract

1,085,704. Component assemblies. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 29, 1965 [Oct. 30, 1964], No. 44373/64. Heading H1R. [Also in Division G1] In apparatus for detecting unauthorized removal of a library book, museum piece, or an article for sale [see Division G1], a printed resonant circuit is attached to the object to be detected. As shown in Fig. 3a, the printed circuit comprises an insulating card 36 bearing a conductive disc and rim 37, 38 co-operating capacitively with a disc 41 and rim 40 on the other side of the card and interconnected by an inductive spiral 39. A straight conductor 42 interconnects disc 41 and rim 40. Cuts 43 in the discs and rims reduce eddy currents.
GB4437364A 1964-10-30 1964-10-30 Apparatus for detecting an object Expired GB1085704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4437364A GB1085704A (en) 1964-10-30 1964-10-30 Apparatus for detecting an object

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4437364A GB1085704A (en) 1964-10-30 1964-10-30 Apparatus for detecting an object

Publications (1)

Publication Number Publication Date
GB1085704A true GB1085704A (en) 1967-10-04

Family

ID=10432979

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4437364A Expired GB1085704A (en) 1964-10-30 1964-10-30 Apparatus for detecting an object

Country Status (1)

Country Link
GB (1) GB1085704A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2166216A1 (en) * 1971-12-30 1973-08-10 Lichtblau George
US3755803A (en) * 1969-04-02 1973-08-28 Unisearch Ltd Electronic surveillance system
FR2390784A1 (en) * 1977-05-09 1978-12-08 Knogo Corp THEFT PROTECTION DEVICE
GB2000382A (en) * 1977-06-20 1979-01-04 Knogo Corp Target wafer for use in an electronic theft detection system
GB2133950A (en) * 1982-12-14 1984-08-01 Shigekazu Takeda Electronic surveillance sytems
EP0136265A1 (en) * 1983-09-16 1985-04-03 Maurer Volex AG Resonant circuit for theft protection of articles, method of making such circuits and device for carrying out the method
DE3405745A1 (en) * 1984-02-17 1985-08-22 Hans 4030 Ratingen Farmont Hand-operated fire extinguisher having a wall holder
US4642613A (en) * 1984-03-16 1987-02-10 Knogo Corporation Electronic theft detection apparatus with responder elements on protected articles
GB2202108A (en) * 1987-03-03 1988-09-14 Silkeborg Elect Identific Syst Transponder identification
US4812811A (en) * 1986-02-13 1989-03-14 Intermodulation And Safety System Ab Alarm tag
US4890115A (en) * 1988-02-10 1989-12-26 Monarch Marking Systems, Inc. Magnetic antenna

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755803A (en) * 1969-04-02 1973-08-28 Unisearch Ltd Electronic surveillance system
FR2166216A1 (en) * 1971-12-30 1973-08-10 Lichtblau George
FR2390784A1 (en) * 1977-05-09 1978-12-08 Knogo Corp THEFT PROTECTION DEVICE
GB2000382A (en) * 1977-06-20 1979-01-04 Knogo Corp Target wafer for use in an electronic theft detection system
GB2000382B (en) * 1977-06-20 1982-01-20 Knogo Corp Target wafer for use in an electronic theft detection system
GB2133950A (en) * 1982-12-14 1984-08-01 Shigekazu Takeda Electronic surveillance sytems
EP0136265A1 (en) * 1983-09-16 1985-04-03 Maurer Volex AG Resonant circuit for theft protection of articles, method of making such circuits and device for carrying out the method
DE3405745A1 (en) * 1984-02-17 1985-08-22 Hans 4030 Ratingen Farmont Hand-operated fire extinguisher having a wall holder
US4642613A (en) * 1984-03-16 1987-02-10 Knogo Corporation Electronic theft detection apparatus with responder elements on protected articles
US4812811A (en) * 1986-02-13 1989-03-14 Intermodulation And Safety System Ab Alarm tag
GB2202108A (en) * 1987-03-03 1988-09-14 Silkeborg Elect Identific Syst Transponder identification
US4890115A (en) * 1988-02-10 1989-12-26 Monarch Marking Systems, Inc. Magnetic antenna

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