GB1297279A - - Google Patents

Info

Publication number
GB1297279A
GB1297279A GB1297279DA GB1297279A GB 1297279 A GB1297279 A GB 1297279A GB 1297279D A GB1297279D A GB 1297279DA GB 1297279 A GB1297279 A GB 1297279A
Authority
GB
United Kingdom
Prior art keywords
wave
frequency
coil
produce
july
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
Other languages
English (en)
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 filed Critical
Publication of GB1297279A publication Critical patent/GB1297279A/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
    • G08B13/242—Tag deactivation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence
    • 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
    • G08B13/2451—Specific applications combined with EAS
    • G08B13/2454—Checking of authorisation of a person accessing tagged items in an EAS system

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Automation & Control Theory (AREA)
  • Electromagnetism (AREA)
  • Theoretical Computer Science (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)
  • Near-Field Transmission Systems (AREA)
GB1297279D 1969-07-09 1970-07-01 Expired GB1297279A (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5470869 1969-07-09

Publications (1)

Publication Number Publication Date
GB1297279A true GB1297279A (sv) 1972-11-22

Family

ID=12978285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1297279D Expired GB1297279A (sv) 1969-07-09 1970-07-01

Country Status (4)

Country Link
CA (1) CA926969A (sv)
DE (1) DE2033796A1 (sv)
FR (1) FR2051626B1 (sv)
GB (1) GB1297279A (sv)

Cited By (3)

* 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
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
GB2202108A (en) * 1987-03-03 1988-09-14 Silkeborg Elect Identific Syst Transponder identification

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL192276C (nl) * 1978-11-28 1997-04-03 James Arnold Rodrian Systeem voor het identificeren van dieren.
FR2443725B1 (fr) * 1978-12-08 1985-11-29 Rodrian James Dispositif d'identification d'animaux
WO1981001063A1 (en) * 1979-10-09 1981-04-16 Mastiff Security Syst Ltd Computer system
EP0034230A1 (en) * 1980-02-19 1981-08-26 Jerome Hal Lemelson Switch and lock activating system and method
EP0048245A1 (en) * 1980-03-27 1982-03-31 Polymark International Limited System and method for identifying an article to which a label is attached
DE3043557C2 (de) * 1980-11-19 1987-12-23 Hartmut 6900 Heidelberg Bernot Vorrichtung zum Erfassen, Übertragen und Verarbeiten von in optisch lesbaren Codes vorliegenden Daten
DE3234345A1 (de) * 1982-09-16 1984-03-22 Robert Bosch Gmbh, 7000 Stuttgart Kodiersystem zur erfassung von informationen an werkstuecktraegern und dergleichen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1470762A (fr) * 1965-03-05 1967-02-24 Procédé et appareil pour détecter le passage interdit d'un article par un point de contrôle
CH476358A (fr) * 1968-04-05 1969-07-31 Cholley Jacques Installation de surveillance d'un objet

Cited By (3)

* 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
US4481428A (en) * 1981-05-19 1984-11-06 Security Tag Systems, Inc. Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
GB2202108A (en) * 1987-03-03 1988-09-14 Silkeborg Elect Identific Syst Transponder identification

Also Published As

Publication number Publication date
CA926969A (en) 1973-05-22
DE2033796A1 (de) 1971-02-18
FR2051626A1 (sv) 1971-04-09
FR2051626B1 (sv) 1974-03-22

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Legal Events

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