GB594056A - Improvements in or relating to optical projectors for images carried on a film strip - Google Patents
Improvements in or relating to optical projectors for images carried on a film stripInfo
- Publication number
- GB594056A GB594056A GB1615645A GB1615645A GB594056A GB 594056 A GB594056 A GB 594056A GB 1615645 A GB1615645 A GB 1615645A GB 1615645 A GB1615645 A GB 1615645A GB 594056 A GB594056 A GB 594056A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- plate
- movement
- relating
- film strip
- 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
- G03B1/00—Film strip handling
- G03B1/56—Threading; Loop forming
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
594,056. Optical projectors for strip film. LANCHESTER, G. H. June 25, 1945, No. 16156. [Class 97 (i)] In a gate for optical projection apparatus for strip film, the pressure plate 4 is hinged at 5 and the end 7 lifted during film movement by a cam 8, the pressure glass 1 being carried in a frame 2 pivoted at 3 to the plate 4, the frame being acted on below the axis 3 by a leaf spring 9, and its pivotal movement being limited by a stop. The leaf spring thus keeps the end of the pressure plate in contact with the cam and, as the end of the plate is lifted, rotates the frame 2 in a direction opposite to the rotation of the plate so that approximately parallel movement of the glass 1 is obtained. The stop to limit the movement of the frame 2 is the edge 13 of the aperture in the plate 4 into which the frame projects. The spring 9 is coiled round a pin 10 and its central portion is secured by a nut 12, its two free ends bearing on the frame 2.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594056A true GB594056A (en) | 1947-10-31 |
Family
ID=1732100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1615645A Expired GB594056A (en) | 1945-06-25 | Improvements in or relating to optical projectors for images carried on a film strip |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB594056A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2595978A (en) * | 1950-04-12 | 1952-05-06 | Viewlex Inc | Filmstrip transporting mechanism |
| FR2343270A1 (en) * | 1976-03-04 | 1977-09-30 | Rfd Systems Eng Ltd | PRESSURE PLATE FOR CINEMATOGRAPHIC PROJECTOR |
| DE3226280A1 (en) * | 1982-07-14 | 1984-01-19 | H. Jürgen Prof. Dr. 4400 Münster Andrä | Film holding-down method |
| US4432619A (en) * | 1981-02-24 | 1984-02-21 | Topper Manufacturing Corporation | Compact collapsible microform viewer |
-
1945
- 1945-06-25 GB GB1615645A patent/GB594056A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2595978A (en) * | 1950-04-12 | 1952-05-06 | Viewlex Inc | Filmstrip transporting mechanism |
| FR2343270A1 (en) * | 1976-03-04 | 1977-09-30 | Rfd Systems Eng Ltd | PRESSURE PLATE FOR CINEMATOGRAPHIC PROJECTOR |
| US4432619A (en) * | 1981-02-24 | 1984-02-21 | Topper Manufacturing Corporation | Compact collapsible microform viewer |
| DE3226280A1 (en) * | 1982-07-14 | 1984-01-19 | H. Jürgen Prof. Dr. 4400 Münster Andrä | Film holding-down method |
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