FR823681A - Perfectionnement apporté aux projections lumineuses - Google Patents
Perfectionnement apporté aux projections lumineusesInfo
- Publication number
- FR823681A FR823681A FR823681DA FR823681A FR 823681 A FR823681 A FR 823681A FR 823681D A FR823681D A FR 823681DA FR 823681 A FR823681 A FR 823681A
- Authority
- FR
- France
- Prior art keywords
- improvement
- light projections
- projections
- light
- 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
- H05B31/00—Electric arc lamps
- H05B31/0018—Electric arc lamps in a closed vessel
- H05B31/0021—Construction, in particular closure, of the vessel
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU823681X | 1936-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR823681A true FR823681A (fr) | 1938-01-25 |
Family
ID=19733829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR823681D Expired FR823681A (fr) | 1936-11-27 | 1937-06-29 | Perfectionnement apporté aux projections lumineuses |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR823681A (fr) |
-
1937
- 1937-06-29 FR FR823681D patent/FR823681A/fr not_active Expired
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