GB970289A - Camera battery test indicator - Google Patents
Camera battery test indicatorInfo
- Publication number
- GB970289A GB970289A GB2417163A GB2417163A GB970289A GB 970289 A GB970289 A GB 970289A GB 2417163 A GB2417163 A GB 2417163A GB 2417163 A GB2417163 A GB 2417163A GB 970289 A GB970289 A GB 970289A
- Authority
- GB
- United Kingdom
- Prior art keywords
- battery
- instrument
- switch
- june
- photo
- 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)
- Exposure Control For Cameras (AREA)
Abstract
970, 289. Photographic and cine cameras. EASTMAN KODAK CO. June 18, 1963 [June 29, 1962], No. 24171/63. Headings G2A and G2E. A photographic camera has an exposure control system provided with an electromechanical transducer having a movable output member in a first direction as a function of the intensity of scene light sensed by a photoresponsive element and in an opposite direction when coupled through a switch, to a source of electrical power of the camera. A photoresponsive device 10, e.g., a photoelectric cell, phototransister, photo-voltaic cell or photo-resistive cell is electrically connected with an electrical measuring instrument 11 through a switch 12. A movable member 13 of the instrument 11 is deflected as a function of scene brightness, in known manner, to vary the setting of a diaphragm vane 29 for automatically adjusting exposure value. On moving switch 12 to a second position to engage contacts 16, 17 a battery 18 is placed in circuit with the instrument 11 for measuring the potential difference across the battery. The polarities of the battery 18 and device 10 connections are opposite, thus causing the member 13 to deflect in opposite directions.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20641962A | 1962-06-29 | 1962-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB970289A true GB970289A (en) | 1964-09-16 |
Family
ID=22766283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2417163A Expired GB970289A (en) | 1962-06-29 | 1963-06-18 | Camera battery test indicator |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB970289A (en) |
-
1963
- 1963-06-18 GB GB2417163A patent/GB970289A/en not_active Expired
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