FR677277A - Appareil de projection épiscopique - Google Patents
Appareil de projection épiscopiqueInfo
- Publication number
- FR677277A FR677277A FR677277DA FR677277A FR 677277 A FR677277 A FR 677277A FR 677277D A FR677277D A FR 677277DA FR 677277 A FR677277 A FR 677277A
- Authority
- FR
- France
- Prior art keywords
- projection apparatus
- episcopic projection
- episcopic
- 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 |
---|---|---|---|
DE677277X | 1928-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR677277A true FR677277A (fr) | 1930-03-06 |
Family
ID=6594078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR677277D Expired FR677277A (fr) | 1928-06-29 | 1929-06-24 | Appareil de projection épiscopique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR677277A (fr) |
-
1929
- 1929-06-24 FR FR677277D patent/FR677277A/fr not_active Expired
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