GB839807A - Automatic iris control and indicating unit for cameras - Google Patents
Automatic iris control and indicating unit for camerasInfo
- Publication number
- GB839807A GB839807A GB19503/58A GB1950358A GB839807A GB 839807 A GB839807 A GB 839807A GB 19503/58 A GB19503/58 A GB 19503/58A GB 1950358 A GB1950358 A GB 1950358A GB 839807 A GB839807 A GB 839807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- disc
- meter
- cameras
- readings
- 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
- G03B7/081—Analogue circuits
- G03B7/085—Analogue circuits for control of aperture
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
- Exposure Control For Cameras (AREA)
Abstract
839,807. Photo-electric control of photographic exposure. GOSSEN & CO. G.m.b.H., P. June 18, 1958 [Jan. 25, 1958], No. 19503/58. Class 40 (3). The effective lens aperture, e.g. of a cinecamera, is determined by the intersection of slots 4a, 5a in a pair of flat members, one of which is secured to the moving coil of a photoelectric exposure meter, the other being driven by the first, e.g. by a pin-and-slot coupling. Alternative slot arrangements are illustrated in Figs. 2 and 3 (not shown). In the cine-camera shown, the effective aperture may be controlled manually by means of a rotary disc provided with holes corresponding to the stop desired. When this disc is moved away from its normal position with the largest hole aligned with the lens, it operates contact-springs to shunt out the photo-electric system. The meter has a transparent dial and its readings or readings indicative of the position of the manually-set disc, the peripheral portion of which is left transparent, can be seen through the viewfinder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE839807X | 1958-01-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB839807A true GB839807A (en) | 1960-06-29 |
Family
ID=6762031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19503/58A Expired GB839807A (en) | 1958-01-25 | 1958-06-18 | Automatic iris control and indicating unit for cameras |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB839807A (en) |
-
1958
- 1958-06-18 GB GB19503/58A patent/GB839807A/en not_active Expired
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