FR2379869A1 - Merchandise display window surveillance system - uses laser source which transmits flat beam through window which is detected by receiver in corner of pane - Google Patents

Merchandise display window surveillance system - uses laser source which transmits flat beam through window which is detected by receiver in corner of pane

Info

Publication number
FR2379869A1
FR2379869A1 FR7703114A FR7703114A FR2379869A1 FR 2379869 A1 FR2379869 A1 FR 2379869A1 FR 7703114 A FR7703114 A FR 7703114A FR 7703114 A FR7703114 A FR 7703114A FR 2379869 A1 FR2379869 A1 FR 2379869A1
Authority
FR
France
Prior art keywords
window
receiver
corner
pane
surveillance system
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.)
Pending
Application number
FR7703114A
Other languages
French (fr)
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.)
FLAVENOT BERNARD
Original Assignee
FLAVENOT BERNARD
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 FLAVENOT BERNARD filed Critical FLAVENOT BERNARD
Priority to FR7703114A priority Critical patent/FR2379869A1/en
Publication of FR2379869A1 publication Critical patent/FR2379869A1/en
Pending 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
    • G08B13/02—Mechanical actuation
    • G08B13/04—Mechanical actuation by breaking of glass
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

The window surveillance system uses a laser luminous source (2) which emits a light beam (3) which is only slightly absorbed by the material from which the window is made. The beam (3) is captured by a receiver (12) after it has been in contact with the window. An alarm (15) is actuated by the receiver when a certain step value has been exceeded. The system has means for introducing into the thickness of the window a flat beam whose thickness is approx. equal to the window thickness. The receiver (12) receives the flat beam after it has swept the whole of the interior of the window pane. The laser luminous source (2) is connected to the window by fibre optics fixed to the glass. The beam being introduced at a corner of the window. The receiver is arranged and fixed at an opposite corner of the window to which the beam is introduced.
FR7703114A 1977-02-04 1977-02-04 Merchandise display window surveillance system - uses laser source which transmits flat beam through window which is detected by receiver in corner of pane Pending FR2379869A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7703114A FR2379869A1 (en) 1977-02-04 1977-02-04 Merchandise display window surveillance system - uses laser source which transmits flat beam through window which is detected by receiver in corner of pane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7703114A FR2379869A1 (en) 1977-02-04 1977-02-04 Merchandise display window surveillance system - uses laser source which transmits flat beam through window which is detected by receiver in corner of pane

Publications (1)

Publication Number Publication Date
FR2379869A1 true FR2379869A1 (en) 1978-09-01

Family

ID=9186290

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7703114A Pending FR2379869A1 (en) 1977-02-04 1977-02-04 Merchandise display window surveillance system - uses laser source which transmits flat beam through window which is detected by receiver in corner of pane

Country Status (1)

Country Link
FR (1) FR2379869A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367460A (en) * 1979-10-17 1983-01-04 Henri Hodara Intrusion sensor using optic fiber
WO1983001835A1 (en) * 1981-11-19 1983-05-26 Friedrich, Hans, P. Electro optical control installation for controlling the content of containers
WO1984004985A1 (en) * 1983-06-03 1984-12-20 Hughes Technology Pty Ltd Laser security system
WO1992011617A1 (en) * 1990-12-19 1992-07-09 Patrick Macron Theft protection device particularly for motor vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353702A1 (en) * 1973-10-26 1975-04-30 Guenter Haag Breakage detector for windows doors etc. - initiates alarm when unauthorised entry using light source and photo-detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353702A1 (en) * 1973-10-26 1975-04-30 Guenter Haag Breakage detector for windows doors etc. - initiates alarm when unauthorised entry using light source and photo-detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367460A (en) * 1979-10-17 1983-01-04 Henri Hodara Intrusion sensor using optic fiber
WO1983001835A1 (en) * 1981-11-19 1983-05-26 Friedrich, Hans, P. Electro optical control installation for controlling the content of containers
WO1984004985A1 (en) * 1983-06-03 1984-12-20 Hughes Technology Pty Ltd Laser security system
WO1992011617A1 (en) * 1990-12-19 1992-07-09 Patrick Macron Theft protection device particularly for motor vehicles

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