GB206115A - Improvements in kinematograph apparatus - Google Patents
Improvements in kinematograph apparatusInfo
- Publication number
- GB206115A GB206115A GB20213/23A GB2021323A GB206115A GB 206115 A GB206115 A GB 206115A GB 20213/23 A GB20213/23 A GB 20213/23A GB 2021323 A GB2021323 A GB 2021323A GB 206115 A GB206115 A GB 206115A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lens
- tubes
- lenses
- turret
- engaging
- 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
- G03B19/00—Cameras
- G03B19/18—Motion-picture cameras
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Lens Barrels (AREA)
Abstract
206,115. Etablissements Continsouza Soc. Anon. Oct. 25, 1922, [Convention date]. Lens mounts.-The lenses in a lens turret for kinematograph apparatus are simultaneously focused by the provision of threaded rings surrounding tubes carrying the lenses and engaging threads or the like thereon, the rings being connected to a common operating member; means for indicating the Lens in use may be provided. As shown, the turret 2, carrying three lenses in externally-threaded tubes 10, is surrounded by a ring 1 having a toothed rack 1<1>. The ring is rotatable on the turret and has slots 5 engaging studs 6 in lugs 7<1> formed on threaded rings 7 engaging the tubes 10. The pitches of the threads vary in accordance with the focal lengths of the lenses so that equal rotations of the tubes 10 produce appropriate focusing displacements. The tubes 10 are prevented from rotating by the engagement of studs 13 in slots therein. The ring 1 is rotated by a pointer 17 moving over a focusing scale IS and arried by the shaft 15 of a toothed wheel 14 engaging the rack 1'. A pinion 19 on the shaft 15 engages a toothed wheel 20 bearing numbers visible through an opening 22 and indicating the lens in use. The gearing is such that rotation of the turret sufficient to substitute one lens for another causes the pointer 17 to make one rotation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR206115X | 1922-10-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB206115A true GB206115A (en) | 1924-02-07 |
Family
ID=8880396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20213/23A Expired GB206115A (en) | 1922-10-25 | 1923-08-08 | Improvements in kinematograph apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB206115A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2572729A (en) * | 1948-03-16 | 1951-10-23 | Pye Ltd | Television camera focusing mechanism |
US4204732A (en) * | 1978-06-16 | 1980-05-27 | Minolta Camera Kabushiki Kaisha | Focus adjusting mechanism for variable magnification device |
-
1923
- 1923-08-08 GB GB20213/23A patent/GB206115A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2572729A (en) * | 1948-03-16 | 1951-10-23 | Pye Ltd | Television camera focusing mechanism |
US4204732A (en) * | 1978-06-16 | 1980-05-27 | Minolta Camera Kabushiki Kaisha | Focus adjusting mechanism for variable magnification device |
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