GB320101A - Improvements in or relating to photographic half-tone reproduction apparatus - Google Patents
Improvements in or relating to photographic half-tone reproduction apparatusInfo
- Publication number
- GB320101A GB320101A GB1916528A GB1916528A GB320101A GB 320101 A GB320101 A GB 320101A GB 1916528 A GB1916528 A GB 1916528A GB 1916528 A GB1916528 A GB 1916528A GB 320101 A GB320101 A GB 320101A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- screen
- relating
- exposure
- reproduction apparatus
- 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
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/66—Details specially adapted for holding half-tone screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
320,101. Sommavilla, E. July 2, 1928. Modifying light-action during exposure.-To enable a half-tone screen to be used in two successive positions during exposure such that the intervals of the mesh will interchange position with the crossing of the lines, the screen 4, Fig. 2, is mounted in a frame 3 within a holder 2 which is held initially against the action of springs 8, 9 as by a movable spring-controlled catch 11 engaging a projecting member on the frame 3. To shift the screen during an exposure, the catch is released as by a pneumatic pressure on the piston slide 16, allowing the frame 3 to move through the requisite interval 13. To adjust this interval for screens of different mesh, an adjustable bar 20, Fig. 3, may be provided within the frame 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1916528A GB320101A (en) | 1928-07-02 | 1928-07-02 | Improvements in or relating to photographic half-tone reproduction apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1916528A GB320101A (en) | 1928-07-02 | 1928-07-02 | Improvements in or relating to photographic half-tone reproduction apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB320101A true GB320101A (en) | 1929-10-02 |
Family
ID=10124832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1916528A Expired GB320101A (en) | 1928-07-02 | 1928-07-02 | Improvements in or relating to photographic half-tone reproduction apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB320101A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460507A (en) * | 1944-10-25 | 1949-02-01 | Gen Aniline & Film Corp | Adjustable multicolored light filter |
| DE1133238B (en) * | 1958-04-11 | 1962-07-12 | Powers Chemco Inc | Photomechanical camera |
-
1928
- 1928-07-02 GB GB1916528A patent/GB320101A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2460507A (en) * | 1944-10-25 | 1949-02-01 | Gen Aniline & Film Corp | Adjustable multicolored light filter |
| DE1133238B (en) * | 1958-04-11 | 1962-07-12 | Powers Chemco Inc | Photomechanical camera |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1923891A (en) | Apparatus for refracting light rays | |
| GB320101A (en) | Improvements in or relating to photographic half-tone reproduction apparatus | |
| ES379864A1 (en) | Lining device | |
| GB339368A (en) | Improvements in or relating to apparatus for stereoscopic photography | |
| SU20958A1 (en) | Fire prevention device for the film projector | |
| SU29355A1 (en) | Device for designing a domed screen | |
| GB211757A (en) | Improvements in and relating to colour screens for use with cinematograph and like projectors | |
| GB393257A (en) | Improvements in motion picture records and methods of producing the same | |
| GB309178A (en) | Method of projecting images particularly for kinematographic projection | |
| FR674563A (en) | Apparatus for projecting clichés on glass with a cinematographic camera lantern, illuminated by a mirror arc | |
| FR740866A (en) | Device for embossing lenticular screen films by means of embossing cylinders | |
| ES383592A1 (en) | A shuttering device for projecting a slide on a projector on a screen. (Machine-translation by Google Translate, not legally binding) | |
| ES113660A1 (en) | Shutter control mechanism in cinematographic projection apparatus. | |
| GB316141A (en) | Improvements in or relating to cinematographic apparatus | |
| ES119476A1 (en) | A security device for cinematographic projection apparatus. | |
| FR600800A (en) | Cinematographic projection apparatus, fitted with a device for adjusting the image position | |
| ES122359A1 (en) | A film pressure device for cinematographic apparatus. | |
| GB333099A (en) | Improvements in and relating to cinematograph projectors | |
| DK61757C (en) | Method and Apparatus for Making Image Projection Screens. | |
| FR667228A (en) | Device for winding the barrel of cinematographic apparatus, fitted with a spring movement | |
| GB269277A (en) | Improvements in or relating to slide carriers for kinematograph projectors | |
| FR708159A (en) | Films, devices and the like for projection apparatus | |
| ES204208A1 (en) | Chromatizador of projection images (Machine-translation by Google Translate, not legally binding) | |
| CA289270A (en) | Lens attachment for photographic apparatus | |
| CA298767A (en) | Cinematograph projection apparatus |