FR684293A - Film projection device - Google Patents
Film projection deviceInfo
- Publication number
- FR684293A FR684293A FR684293DA FR684293A FR 684293 A FR684293 A FR 684293A FR 684293D A FR684293D A FR 684293DA FR 684293 A FR684293 A FR 684293A
- Authority
- FR
- France
- Prior art keywords
- projection device
- film projection
- film
- projection
- 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
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE684293X | 1928-11-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR684293A true FR684293A (en) | 1930-06-24 |
Family
ID=6597570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR684293D Expired FR684293A (en) | 1928-11-03 | 1929-11-02 | Film projection device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR684293A (en) |
-
1929
- 1929-11-02 FR FR684293D patent/FR684293A/en not_active Expired
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