FR2416514A1 - Procede et dispositif de protection contre le vol - Google Patents

Procede et dispositif de protection contre le vol

Info

Publication number
FR2416514A1
FR2416514A1 FR7803078A FR7803078A FR2416514A1 FR 2416514 A1 FR2416514 A1 FR 2416514A1 FR 7803078 A FR7803078 A FR 7803078A FR 7803078 A FR7803078 A FR 7803078A FR 2416514 A1 FR2416514 A1 FR 2416514A1
Authority
FR
France
Prior art keywords
field
generator
control zone
establish
precisely defined
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.)
Granted
Application number
FR7803078A
Other languages
English (en)
French (fr)
Other versions
FR2416514B1 (enrdf_load_stackoverflow
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7803078A priority Critical patent/FR2416514A1/fr
Publication of FR2416514A1 publication Critical patent/FR2416514A1/fr
Application granted granted Critical
Publication of FR2416514B1 publication Critical patent/FR2416514B1/fr
Granted 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
    • G08B13/2465—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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Burglar Alarm Systems (AREA)
FR7803078A 1978-02-03 1978-02-03 Procede et dispositif de protection contre le vol Granted FR2416514A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7803078A FR2416514A1 (fr) 1978-02-03 1978-02-03 Procede et dispositif de protection contre le vol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7803078A FR2416514A1 (fr) 1978-02-03 1978-02-03 Procede et dispositif de protection contre le vol

Publications (2)

Publication Number Publication Date
FR2416514A1 true FR2416514A1 (fr) 1979-08-31
FR2416514B1 FR2416514B1 (enrdf_load_stackoverflow) 1983-04-29

Family

ID=9204195

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7803078A Granted FR2416514A1 (fr) 1978-02-03 1978-02-03 Procede et dispositif de protection contre le vol

Country Status (1)

Country Link
FR (1) FR2416514A1 (enrdf_load_stackoverflow)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707711A (en) * 1970-04-02 1972-12-26 Peter Harold Cole Electronic surveillance system
US3895368A (en) * 1972-08-09 1975-07-15 Sensormatic Electronics Corp Surveillance system and method utilizing both electrostatic and electromagnetic fields

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707711A (en) * 1970-04-02 1972-12-26 Peter Harold Cole Electronic surveillance system
US3895368A (en) * 1972-08-09 1975-07-15 Sensormatic Electronics Corp Surveillance system and method utilizing both electrostatic and electromagnetic fields

Also Published As

Publication number Publication date
FR2416514B1 (enrdf_load_stackoverflow) 1983-04-29

Similar Documents

Publication Publication Date Title
ES472647A1 (es) Un sistema de vigilancia perfeccionado para detectar la pre-sencia, en un espacio controlado, de un receptor-retransmi- sor de senales electricas
ES413541A1 (es) Un sistema de vigilancia para detectar la presencia en un espacio controlado de un receptor-retransmisor de senales electricas.
DE69129002D1 (de) Periodisches pulsdiskriminierungssystem
CH653853GA3 (enrdf_load_stackoverflow)
JPS5619467A (en) Doppler radar
GB1241924A (en) Electro-medical apparatus
DK374687A (da) Anlaeg til fjernovervaagning af tilstedevaerelsen i et naerliggende omraade af en bevaegelig genstand, et dyr eller et menneske
FR2416514A1 (fr) Procede et dispositif de protection contre le vol
JPS51116609A (en) Initial connection system and apparatus for time division multiple acc ess communication system
EP0005127A3 (en) Improvement in systems of frequency translation of frequency-modulated signals
JPS5779476A (en) Identification device
JPS57106882A (en) Data transmitting device
JPS55100795A (en) Remote control system
EP0284152A3 (en) Amplitude modulation apparatus
JPS57106880A (en) Data transmitting device
JPS6484948A (en) Demodulation system for frequency modulation signal
FR2354785A1 (fr) Dispositif de reperage en montagne
FR2444945A1 (fr) Systeme forme d'un dispositif interrogateur et d'un dispositif repondeur, destine notamment a la radiolocalisation
JPS52150927A (en) Draw-out circuit of code signal
JPS5494266A (en) Pulse modulation system
JPS5438715A (en) Frequency shift detector circuit
JPS5393761A (en) Fm modulator
ES8104608A1 (es) Sistema de mando a distancia en uhf con dos maniobras,para apertura de puertas o gobierno de otros dispositivos
JPS57174953A (en) Frequency measuring method
JPS558168A (en) Signal identification circuit

Legal Events

Date Code Title Description
ST Notification of lapse