FR930648A - Perfectionnements aux appareils de commande pour l'allumage extrarapide des lampes électriques ordinaires utilisées en photographie - Google Patents
Perfectionnements aux appareils de commande pour l'allumage extrarapide des lampes électriques ordinaires utilisées en photographieInfo
- Publication number
- FR930648A FR930648A FR930648DA FR930648A FR 930648 A FR930648 A FR 930648A FR 930648D A FR930648D A FR 930648DA FR 930648 A FR930648 A FR 930648A
- Authority
- FR
- France
- Prior art keywords
- photography
- extra
- control devices
- ordinary electric
- electric lamps
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency AC, or with separate oscillator frequency
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/16—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR930648T | 1946-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR930648A true FR930648A (fr) | 1948-01-30 |
Family
ID=9447587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR930648D Expired FR930648A (fr) | 1946-06-19 | 1946-06-19 | Perfectionnements aux appareils de commande pour l'allumage extrarapide des lampes électriques ordinaires utilisées en photographie |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR930648A (fr) |
-
1946
- 1946-06-19 FR FR930648D patent/FR930648A/fr not_active Expired
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