DE3376703D1 - Crossed beam high frequency anti-theft system - Google Patents

Crossed beam high frequency anti-theft system

Info

Publication number
DE3376703D1
DE3376703D1 DE8383102895T DE3376703T DE3376703D1 DE 3376703 D1 DE3376703 D1 DE 3376703D1 DE 8383102895 T DE8383102895 T DE 8383102895T DE 3376703 T DE3376703 T DE 3376703T DE 3376703 D1 DE3376703 D1 DE 3376703D1
Authority
DE
Germany
Prior art keywords
frequency
center frequency
antenna
displaced
antennae
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
DE8383102895T
Other languages
English (en)
Inventor
Philip Daniel Fancher
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.)
Zeneca Inc
Original Assignee
ICI Americas Inc
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 ICI Americas Inc filed Critical ICI Americas Inc
Application granted granted Critical
Publication of DE3376703D1 publication Critical patent/DE3376703D1/de
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
    • 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
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
    • 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
    • G08B13/2471—Antenna signal processing by receiver or emitter
DE8383102895T 1982-04-12 1983-03-23 Crossed beam high frequency anti-theft system Expired DE3376703D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US36771582A 1982-04-12 1982-04-12

Publications (1)

Publication Number Publication Date
DE3376703D1 true DE3376703D1 (en) 1988-06-23

Family

ID=23448316

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383102895T Expired DE3376703D1 (en) 1982-04-12 1983-03-23 Crossed beam high frequency anti-theft system

Country Status (15)

Country Link
EP (1) EP0091581B1 (de)
JP (1) JPS5932093A (de)
KR (1) KR910000108B1 (de)
AT (1) ATE34474T1 (de)
AU (1) AU558397B2 (de)
BR (1) BR8301775A (de)
CA (1) CA1233539A (de)
DE (1) DE3376703D1 (de)
DK (1) DK153183A (de)
ES (1) ES521268A0 (de)
FI (1) FI79625C (de)
MC (1) MC1521A1 (de)
NO (1) NO158390C (de)
NZ (1) NZ203790A (de)
ZA (1) ZA832313B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3578228D1 (de) * 1984-02-15 1990-07-19 Esselte Meto Eas Int Ab Verfahren und anordnung zur detektion eines anzeigegeraets.
US5106175A (en) * 1989-12-28 1992-04-21 At&T Bell Laboratories Locatable object suitable for underground use and methods of locating same
JPH07167427A (ja) * 1993-12-15 1995-07-04 World Seiki:Kk ガスバーナ装置及びガスオーブン及びガスバーナの燃焼制御方法
US6046682A (en) * 1997-09-29 2000-04-04 Ncr Corporation Electronic price label including noisemaker and method of locating electronic price labels
US7492259B2 (en) 2005-03-29 2009-02-17 Accu-Sort Systems, Inc. RFID conveyor system and method
US8854212B2 (en) 2009-03-30 2014-10-07 Datalogic Automation, Inc. Radio frequency identification tag identification system
ES2534702B1 (es) * 2013-09-24 2016-02-09 Ontech Security, Sl Sensor de campos electrostáticos y sistema de seguridad en espacios interiores
CN106980144A (zh) * 2017-03-22 2017-07-25 绍兴职业技术学院 一种硬标签质量参数检测电路

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO126975B (de) * 1967-03-30 1973-04-16 John Welsh
DE2551348A1 (de) * 1975-11-15 1977-05-18 Wilhelm Jank Vorrichtung zur erkennung von resonatormarken
GB1604220A (en) * 1978-04-24 1981-12-02 Parmeko Ltd Detection systems
DE3066810D1 (en) * 1979-05-18 1984-04-12 Parmeko Ltd Method and surveillance system for detecting the presence of an e.m. wave receptor reradiator
CA1190970A (en) * 1980-10-09 1985-07-23 Harold B. Williams Dual frequency anti-theft system

Also Published As

Publication number Publication date
FI79625B (fi) 1989-09-29
ZA832313B (en) 1983-12-28
BR8301775A (pt) 1983-12-20
KR910000108B1 (ko) 1991-01-21
DK153183A (da) 1983-10-13
JPS6356588B2 (de) 1988-11-08
AU558397B2 (en) 1987-01-29
NO158390C (no) 1988-08-31
DK153183D0 (da) 1983-04-06
AU1324283A (en) 1983-10-20
FI831167A0 (fi) 1983-04-06
JPS5932093A (ja) 1984-02-21
NO158390B (no) 1988-05-24
EP0091581A3 (en) 1986-01-15
EP0091581A2 (de) 1983-10-19
MC1521A1 (fr) 1984-02-10
KR840004597A (ko) 1984-10-22
ES8404061A1 (es) 1984-04-01
EP0091581B1 (de) 1988-05-18
NZ203790A (en) 1986-06-11
FI831167L (fi) 1983-10-13
NO831275L (no) 1983-10-13
ATE34474T1 (de) 1988-06-15
ES521268A0 (es) 1984-04-01
CA1233539A (en) 1988-03-01
FI79625C (fi) 1990-01-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee