GB502908A - Improvements in or relating to photographic shutters - Google Patents
Improvements in or relating to photographic shuttersInfo
- Publication number
- GB502908A GB502908A GB26239/37A GB2623937A GB502908A GB 502908 A GB502908 A GB 502908A GB 26239/37 A GB26239/37 A GB 26239/37A GB 2623937 A GB2623937 A GB 2623937A GB 502908 A GB502908 A GB 502908A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- shutter
- photo
- casing
- pointer
- 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
- G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
- G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
- G03B7/099—Arrangement of photoelectric elements in or on the camera
- G03B7/0993—Arrangement of photoelectric elements in or on the camera in the camera
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
Abstract
502,908. Photo - electric exposure meters. JUNGHANS AKT.-GES., GEB. Sept. 28, 1937, No. 26239. Convention date, Oct. 31, 1936. [Class 98 (i)] In a photographic shutter combined with a photo electric exposure meter, the parts of the exposure meter other than the photocell, are built into one or more drum-shaped housings coxially mounted on the rear collar of the shutter housing. The main housing 8 and the front lens support 9 enclose an annular space 10 in which are located the' photo-cell 1 and the mechanical part of the shutter. A drumshaped housing 11 is mounted on the lens support 8a and contains an indicating instrument 13, a permanent magnet 14 and a variable resistance 17. The pointer 15 of the instrument may be observed through the window 16, and a pointer 18 on the ring 18a controls the resistance. Two diaphragms 6, 7 provided with half crescent shaped vanes are arranged in front of the photo-cell 1, and are respectively connected to the speed-adjusting and diaphragm-adjusting members of the shutter. The pointer of the instrument is brought to a fixed mark by adjustment of the speed and diaphragm members. In a modification, the rear housing is divided into two or more housings which may contain some of the parts of the shutter mechanism in addition to the parts of the exposure meter. A window obliquely mounted in the rear wall of the rear housing for observation of the pointer, is also described. The Specification as open to inspection under Sect. 91 also comprises several different means of mounting the sensitive cell. In one example, the cell is mounted, in its own casing coaxially with the lens support, and may be of annular or semi-annular form. The casing may be in front, on, or behind the shutter casing. The cell may also be accommodated in a casing which is hinged to, and may cover, the lens aperture. When folded back from the lens, the casing presents the photo cell to the light. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502908X | 1936-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB502908A true GB502908A (en) | 1939-03-28 |
Family
ID=6545980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26239/37A Expired GB502908A (en) | 1936-10-31 | 1937-09-28 | Improvements in or relating to photographic shutters |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB502908A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874622A (en) * | 1954-10-01 | 1959-02-24 | Hans Deckel | Photographic camera construction |
US2943544A (en) * | 1960-07-05 | Cronholm | ||
US3031581A (en) * | 1962-04-24 | Kukuk | ||
US3040643A (en) * | 1955-03-11 | 1962-06-26 | Gauthier Gmbh A | Photographic intra-lens shutter with incorporated electric exposure-meter |
-
1937
- 1937-09-28 GB GB26239/37A patent/GB502908A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2943544A (en) * | 1960-07-05 | Cronholm | ||
US3031581A (en) * | 1962-04-24 | Kukuk | ||
US2874622A (en) * | 1954-10-01 | 1959-02-24 | Hans Deckel | Photographic camera construction |
US3040643A (en) * | 1955-03-11 | 1962-06-26 | Gauthier Gmbh A | Photographic intra-lens shutter with incorporated electric exposure-meter |
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