FR1191117A - Improvements to infrared beacons - Google Patents
Improvements to infrared beaconsInfo
- Publication number
- FR1191117A FR1191117A FR1191117DA FR1191117A FR 1191117 A FR1191117 A FR 1191117A FR 1191117D A FR1191117D A FR 1191117DA FR 1191117 A FR1191117 A FR 1191117A
- Authority
- FR
- France
- Prior art keywords
- infrared beacons
- beacons
- infrared
- 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
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1191117T | 1958-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1191117A true FR1191117A (en) | 1959-10-16 |
Family
ID=9666723
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1191117D Expired FR1191117A (en) | 1958-02-05 | 1958-02-05 | Improvements to infrared beacons |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1191117A (en) |
-
1958
- 1958-02-05 FR FR1191117D patent/FR1191117A/en not_active Expired
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