GB802020A - Improvements in or relating to photographic camera shutters - Google Patents
Improvements in or relating to photographic camera shuttersInfo
- Publication number
- GB802020A GB802020A GB34595/55A GB3459555A GB802020A GB 802020 A GB802020 A GB 802020A GB 34595/55 A GB34595/55 A GB 34595/55A GB 3459555 A GB3459555 A GB 3459555A GB 802020 A GB802020 A GB 802020A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- meter
- setting member
- arm
- arms
- 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)
- Shutters For Cameras (AREA)
Abstract
802,020. Photo-electric control arrangements. GAUTHIER G.m.b.H., A. Dec. 2, 1955 [Dec. 23, 1954], No. 34595/55. Class 40 (3). A photographic shutter is provided with a photo-electric exposure control mechanism including a lever system which senses the position of the movable part of the meter mechanism from two opposing sides. This arrangement operates effectively and exerts no turning moment on the meter mechanism even when the pivot shaft of the latter is resiliently mounted for the purpose of safeguarding it against shock. In one embodiment the meter shaft carries two corresponding cam surfaces 8b, the position of each of which is felt by the arms 9b, 10a, of levers 9 and 10 pivoted respectively at 11 and 12. The opposite ends of the two levers co-operate with each other by means of slot 9a and pin 13. A. slot in the arm 10a and a pin on the end of one arm (not shown) of lever 17 (Fig. 3), transforms the meter information into a positioning of the stop 17c on the end of arm 17b of lever 17. A light spring 18 associated with lever 17 maintains the arms 9b, 10a, against the control cams 8b. The stop 17c abuts against one or other of the steps 19a on setting ring 19, the pressure of the ring against the stop producing no, or only a small clockwise, turning moment on the lever 17. The ring 19 is arranged to be adjustable on exposure setting member 20 by means of handle 19c which may be positioned, for example, in accordance with the speed of the film in use as indicated on the co-operating scale. So that the meter moment may be completely free to move the exposure setting member may include an abutment which strikes against pin 13 in its initial position and lifts the lever arms 9b and 10a from the cams 8b. A detent device holds the setting member, when set, against the tension of a spring 4. The latching of the setting member is released by depressing button 7 and the member then returns to its initial position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE802020X | 1954-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB802020A true GB802020A (en) | 1958-09-24 |
Family
ID=6717581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB34595/55A Expired GB802020A (en) | 1954-12-23 | 1955-12-02 | Improvements in or relating to photographic camera shutters |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB802020A (en) |
-
1955
- 1955-12-02 GB GB34595/55A patent/GB802020A/en not_active Expired
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