FR1028914A - Photoelectric device - Google Patents
Photoelectric deviceInfo
- Publication number
- FR1028914A FR1028914A FR1028914DA FR1028914A FR 1028914 A FR1028914 A FR 1028914A FR 1028914D A FR1028914D A FR 1028914DA FR 1028914 A FR1028914 A FR 1028914A
- Authority
- FR
- France
- Prior art keywords
- photoelectric device
- photoelectric
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1028914X | 1949-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1028914A true FR1028914A (en) | 1953-05-28 |
Family
ID=7715392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1028914D Expired FR1028914A (en) | 1949-10-31 | 1950-10-30 | Photoelectric device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1028914A (en) |
-
1950
- 1950-10-30 FR FR1028914D patent/FR1028914A/en not_active Expired
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