GB275634A - Improvements in or relating to cinematograph projection apparatus - Google Patents
Improvements in or relating to cinematograph projection apparatusInfo
- Publication number
- GB275634A GB275634A GB20515/27A GB2051527A GB275634A GB 275634 A GB275634 A GB 275634A GB 20515/27 A GB20515/27 A GB 20515/27A GB 2051527 A GB2051527 A GB 2051527A GB 275634 A GB275634 A GB 275634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mirror
- section
- inclination
- objective
- reflected
- 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
- G03B41/00—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor
- G03B41/02—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film
- G03B41/04—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator
- G03B41/06—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor using non-intermittently running film with optical compensator with rotating reflecting member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
Abstract
275,634. BerÚny, R. Aug. 3, 1926, [Convention date]. Kinematograph apparatus.-In continuous-feed apparatus wherein optical compensation is effected by a rotary annular mirror, and the inclination of the mirror surface to the axis varies in radial section so as to effect the compensation, the mirror is positioned between the picture aperture and the objective. As shown, the film is fed by a sprocket 2, and passes from a spood 4, over a curved gate 3 having an aperture of double the picture depth, to a take-up spool 5. The projection beam is reflected by an annular mirror 9 through an objective 12, and is reflected to the screen by a fixed mirror 15. The mirror 9 is carried by a driven spindle 11 and rotates once during the time the film takes to travel an image depth. The mean circumference 13, Fig. 2. of the mirror lies in one plane, and the inclination of the section of its surface made by a radial plane may make an angle of 93‹ to the axis of the spindle 11 at one side of a dividing line 14, and may gradually vary with the position of the section until it makes an angle of 87‹ at the other side of the dividing line.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE275634X | 1926-08-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB275634A true GB275634A (en) | 1928-11-05 |
Family
ID=6026409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20515/27A Expired GB275634A (en) | 1926-08-03 | 1927-08-03 | Improvements in or relating to cinematograph projection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB275634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4152052A (en) * | 1975-08-04 | 1979-05-01 | International Audio Visual, Inc. | Motion picture optical system |
-
1927
- 1927-08-03 GB GB20515/27A patent/GB275634A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4152052A (en) * | 1975-08-04 | 1979-05-01 | International Audio Visual, Inc. | Motion picture optical system |
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