GB895856A - Improvements in photographic benches - Google Patents
Improvements in photographic benchesInfo
- Publication number
- GB895856A GB895856A GB37335/58A GB3733558A GB895856A GB 895856 A GB895856 A GB 895856A GB 37335/58 A GB37335/58 A GB 37335/58A GB 3733558 A GB3733558 A GB 3733558A GB 895856 A GB895856 A GB 895856A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bench
- aperture
- camera
- lens
- diaphragm
- 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
- G03B27/00—Photographic printing apparatus
- G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
- G03B27/722—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus when the reproduction scale is changed
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Exposure In Printing And Copying (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
895,856. Photographic copying cameras. DACQUAY, H. Nov. 20, 1958 [Dec. 6, 1957], No. 37335/58. Class 98(1). In a copying camera the diaphragm aperture adjustment is mechanically controlled by the relative displacements of the lens front and camera back or object carrier so that an increase in magnification is accompanied by an increase in diaphragm aperture. As shown, slide bar 9 has finger 11 engaging in channel guide 12 which is adjustably mounted on bench 1. As the objective carrier 3 is moved along the bench 1, the diaphragm aperture is altered by means of connecting rod 5. A slide (Fig. 3a, not shown), for inserting an apertured diaphragm plate into the lens mount 4 and simultaneously positioning a lamp in front of the lens is described. The plate aperture is smaller than the smallest adjustable aperture, and the lamp is used to give a preliminary printing exposure of a screen arranged in front of the photographic element. The duration of the exposure is varied by rod 17 adjusting clockwork timer 15 in response the movements of slide bar 9. If the back of the camera or object carrier are not fixed in relation to the bench, the guide 12 may be fixed to the movable member.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR895856X | 1957-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB895856A true GB895856A (en) | 1962-05-09 |
Family
ID=9390905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37335/58A Expired GB895856A (en) | 1957-12-06 | 1958-11-20 | Improvements in photographic benches |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB895856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3149548A (en) * | 1961-07-17 | 1964-09-22 | Kamera & Kinowerke Dresden Veb | Photographic objective lens |
-
1958
- 1958-11-20 GB GB37335/58A patent/GB895856A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3149548A (en) * | 1961-07-17 | 1964-09-22 | Kamera & Kinowerke Dresden Veb | Photographic objective lens |
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