NL7404896A - - Google Patents

Info

Publication number
NL7404896A
NL7404896A NL7404896A NL7404896A NL7404896A NL 7404896 A NL7404896 A NL 7404896A NL 7404896 A NL7404896 A NL 7404896A NL 7404896 A NL7404896 A NL 7404896A NL 7404896 A NL7404896 A NL 7404896A
Authority
NL
Netherlands
Application number
NL7404896A
Other versions
NL171388C (nl
NL171388B (nl
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 NL7404896A publication Critical patent/NL7404896A/xx
Publication of NL171388B publication Critical patent/NL171388B/xx
Application granted granted Critical
Publication of NL171388C publication Critical patent/NL171388C/xx

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
    • G08B13/2465—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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Burglar Alarm Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)
NLAANVRAGE7404896,A 1973-04-13 1974-04-10 Elektromagnetisch diefstaldetectiestelsel. NL171388C (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00351018A US3838409A (en) 1973-04-13 1973-04-13 Field strength uniformity control system for article theft detection system

Publications (3)

Publication Number Publication Date
NL7404896A true NL7404896A (en:Method) 1974-10-15
NL171388B NL171388B (nl) 1982-10-18
NL171388C NL171388C (nl) 1983-03-16

Family

ID=23379238

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7404896,A NL171388C (nl) 1973-04-13 1974-04-10 Elektromagnetisch diefstaldetectiestelsel.

Country Status (11)

Country Link
US (2) US3838409A (en:Method)
JP (1) JPS5331720B2 (en:Method)
BE (1) BE813709A (en:Method)
BR (1) BR7402883D0 (en:Method)
CA (1) CA1030239A (en:Method)
FR (1) FR2225794B1 (en:Method)
GB (1) GB1446259A (en:Method)
IT (1) IT1011236B (en:Method)
NL (1) NL171388C (en:Method)
SE (1) SE404443B (en:Method)
ZA (1) ZA742303B (en:Method)

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4017858A (en) * 1973-07-30 1977-04-12 Polhemus Navigation Sciences, Inc. Apparatus for generating a nutating electromagnetic field
US3990065A (en) * 1975-02-20 1976-11-02 The Magnavox Company Theft detection system
US4016553A (en) * 1975-06-27 1977-04-05 Knogo Corporation Article detection system with near field electromagnetic wave control
NL7702946A (nl) * 1976-04-03 1977-10-05 Bizerba Werke Kraut Kg Wilh Werkwijze en inrichting voor het vaststellen van de aanwezigheid van objecten in een bepaald controle- gebied, in het bijzonder voor het verhinderen van winkeldiefstallen.
US4118693A (en) * 1977-05-09 1978-10-03 Knogo Corporation Method and apparatus for producing uniform electromagnetic fields in an article detection system
US4135183A (en) * 1977-05-24 1979-01-16 Minnesota Mining And Manufacturing Company Antipilferage system utilizing "figure-8" shaped field producing and detector coils
JPS55121596A (en) * 1979-03-14 1980-09-18 Yoshida Kogyo Kk Device for protecting shoplifting and theft
US4274090A (en) * 1980-02-19 1981-06-16 Knogo Corporation Detection of articles in adjacent passageways
US4300183A (en) 1980-03-27 1981-11-10 Richardson Robert H Method and apparatus for generating alternating magnetic fields to produce harmonic signals from a metallic strip
NL8200138A (nl) * 1982-01-14 1983-08-01 Nedap Nv Detectiestelsel.
WO1983003203A1 (en) * 1982-03-15 1983-09-29 Progressive Dynamics Method and apparatus for theft detection systems
US4737794A (en) * 1985-12-09 1988-04-12 Mcdonnell Douglas Corporation Method and apparatus for determining remote object orientation and position
US4742356A (en) * 1985-12-09 1988-05-03 Mcdonnell Douglas Corporation Method and apparatus for determining remote object orientation and position
US4798175A (en) * 1986-10-09 1989-01-17 Alfa-Laval Agri, Inc. Electronic identification system
FR2659173B1 (fr) * 1990-03-02 1992-09-18 Neiman Sa Antenne extra-plate a polarisation circulaire, notamment pour un ensemble de telecommande integre d'automobile.
GB9125846D0 (en) * 1991-12-04 1992-02-05 Esselte Meto Int Gmbh Improved interrogation and detection means for theft-detection systems
DE4200082A1 (de) * 1992-01-03 1993-07-08 Minnesota Mining & Mfg Vorrichtung und verfahren zum erkennen eines magnetisierbaren markierungselementes
IL102218A (en) * 1992-06-16 2003-06-24 Elbit Systems Ltd Tracker employing a rotating electromagnetic field
US5646525A (en) * 1992-06-16 1997-07-08 Elbit Ltd. Three dimensional tracking system employing a rotating field
CA2183697A1 (en) * 1995-08-23 1997-02-24 David P. Klaehn Electronic article-surveillance apparatus and method of operating same
US5877728A (en) * 1997-05-28 1999-03-02 Checkpoint Systems, Inc. Multiple loop antenna
DE19752506A1 (de) * 1997-11-27 1999-06-02 Meto International Gmbh System zur Sicherung von Artikeln gegen Diebstahl
US6069564A (en) * 1998-09-08 2000-05-30 Hatano; Richard Multi-directional RFID antenna
US6879300B2 (en) * 2000-02-08 2005-04-12 Cms Partners, Inc. Wireless boundary proximity determining and animal containment system and method
FR2828016B1 (fr) * 2001-07-30 2005-03-25 Pygmalyon Antennes du genre boucle
US6836216B2 (en) * 2002-05-09 2004-12-28 Electronic Article Surveillance Technologies, Ltd. Electronic article surveillance system
US20060279406A1 (en) * 2005-06-07 2006-12-14 Robert Stewart Synchronization and adaptive timing method for multiple RFID reader system

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE355807A (en:Method) * 1927-11-15
US1915786A (en) * 1929-03-02 1933-06-27 Jr John Hays Hammond System of transmission of radiant energy
FR763681A (fr) * 1933-11-10 1934-05-04 Procédé de repérage des objets par modification d'un champ magnétique
US2317071A (en) * 1938-12-30 1943-04-20 Rca Corp Antenna circuit modulation system
US2524760A (en) * 1947-08-28 1950-10-10 Walter J Brown Phase shift bridge
US3500373A (en) * 1966-05-06 1970-03-10 Nat Bank Of North America The Method and apparatus for article theft detection
GB1292380A (en) * 1969-04-02 1972-10-11 Unisearch Ltd Electronic surveillance systems
US3665449A (en) * 1969-07-11 1972-05-23 Minnesota Mining & Mfg Method and apparatus for detecting at a distance the status and identity of objects
US3676772A (en) * 1970-08-18 1972-07-11 Nasa Metallic intrusion detector system
US3740742A (en) * 1971-05-11 1973-06-19 T Thompson Method and apparatus for actuating an electric circuit
BE791039A (fr) * 1971-11-08 1973-05-07 Lewis Security Syst Ltd Systemes de securite
US3820104A (en) * 1972-12-15 1974-06-25 Stop Loss Inc Method and system for detecting an object within a magnetic field interrogation zone
US3938125A (en) * 1974-02-20 1976-02-10 Minnesota Mining And Manufacturing Company Antipilferage system and marker therefor

Also Published As

Publication number Publication date
BE813709A (fr) 1974-10-14
ZA742303B (en) 1975-03-26
IT1011236B (it) 1977-01-20
CA1030239A (en) 1978-04-25
DE2417935B2 (de) 1977-03-17
SE404443B (sv) 1978-10-02
US3838409A (en) 1974-09-24
FR2225794A1 (en:Method) 1974-11-08
NL171388C (nl) 1983-03-16
DE2417935A1 (de) 1974-10-24
USRE29610E (en) 1978-04-11
JPS5331720B2 (en:Method) 1978-09-04
NL171388B (nl) 1982-10-18
JPS5028799A (en:Method) 1975-03-24
AU6785574A (en) 1975-10-16
BR7402883D0 (pt) 1974-12-31
GB1446259A (en) 1976-08-18
FR2225794B1 (en:Method) 1981-10-09

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Legal Events

Date Code Title Description
V1 Lapsed because of non-payment of the annual fee