GB521086A - Improvements in or relating to photographic cameras provided with photo-electric exposure meters - Google Patents
Improvements in or relating to photographic cameras provided with photo-electric exposure metersInfo
- Publication number
- GB521086A GB521086A GB37274/38A GB3727438A GB521086A GB 521086 A GB521086 A GB 521086A GB 37274/38 A GB37274/38 A GB 37274/38A GB 3727438 A GB3727438 A GB 3727438A GB 521086 A GB521086 A GB 521086A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- camera
- elements
- circuit
- control
- 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
- G03B7/12—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 a hand-actuated member moved from one position to another providing the energy to move the setting member, e.g. depression of shutter release button causes a stepped feeler to co-operate with the pointer of the light-sensitive device to set the diaphragm and thereafter release the shutter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Control For Cameras (AREA)
Abstract
521,086. Controlling exposures in photographic and kinematographic cameras. KODAK, Ltd. Dec. 22, 1938, No. 37274. Convention date, Dec. 22, 1937. [Class 98 (ii)] In a photographic camera provided with a photo-electric exposure meter, the photo-electric cell consists of two or more separate lightsensitive elements one or more of which may be selectively inserted in the exposure meter circuit by switch means under the control of one of the exposure controlling devices of the camera. As shown, the kinematograph camera 10 includes a photo-electric exposure meter, the coil 13 of which is in circuit with one element 14 of the photo-electric cell, which has additional elements 15 and 16 selectively connected in parallel with the element 14 by a switch 19 comprising bars 20, 21 and 22 biassed into contact by the spring 23. The diaphragm of the objective 11 is controlled by the position of the meter pointer 12. The camera 10 has a control knob 24 bearing a scale 25 co-operating with a mark 26 to indicate the setting of the shutter-speed mechanism. The knob 24 is on a shaft 27 carrying the speed controlling member and also a cam 28 adapted to control the switch 19 by a lever 29 with one end engaging the cam 28 and the other the bar 20. When the camera is set for a high speed the cam 28 is in a position to hold all three bars 20, 21 and 22 out of engagement and only the light-sensitive element 14 is in circuit with the coil 13. If the speed is decreased, the lever 29 rotates to permit first the bar 21 and then the bar 22, and correspondingly the lightsensitive elements 15 and 16 to be brought into circuit. The elements 14 and 15 are of equal size and the element 16 is of double size. An embossing on the film magazine may control a bell-crank lever moving a grid positioned immediately behind lenses spaced in front of the light - sensitive elements. Specifications 451,659 and 521,083 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US521086XA | 1937-12-22 | 1937-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB521086A true GB521086A (en) | 1940-05-10 |
Family
ID=21975524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37274/38A Expired GB521086A (en) | 1937-12-22 | 1938-12-22 | Improvements in or relating to photographic cameras provided with photo-electric exposure meters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB521086A (en) |
-
1938
- 1938-12-22 GB GB37274/38A patent/GB521086A/en not_active Expired
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