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 paneInfo
- 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
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.
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)
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)
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 |
-
1977
- 1977-02-04 FR FR7703114A patent/FR2379869A1/en active Pending
Patent Citations (1)
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)
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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