GB984434A - Photographic camera - Google Patents
Photographic cameraInfo
- Publication number
- GB984434A GB984434A GB4408361A GB4408361A GB984434A GB 984434 A GB984434 A GB 984434A GB 4408361 A GB4408361 A GB 4408361A GB 4408361 A GB4408361 A GB 4408361A GB 984434 A GB984434 A GB 984434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- diaphragm
- rings
- exposure
- engaging
- 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
-
- 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
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/08—Shutters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
- Exposure Control For Cameras (AREA)
Abstract
984,434. Photographic cameras; diaphragms. AGFA A.G. Dec. 8, 1961 [Dec. 15, 1960], No. 44083/61. Headings G2A and G2J. In a camera having a diaphragm comprising two coaxial resiliently coupled rotatable diaphragm leaf bearing rings rotatable relatively against the loading of the resilient coupling, the rings are further coupled by a mechanism for effecting such relative rotation, the arrangement being such that, by rotation of one of the rings, the two rings can be rotated together from a region in which the said mechanism is idle to a region in which is is responsive to the position of a control means to cause a relative rotation of the rings to adjust the diaphragm. As shown, each diaphragm blade 8 is supported between rings 6,7 which are connected by a spring 17 and a linkage 19, 20. The ring 6 may be manually set by a fingerpiece 25 to bring a reference mark 26 to a chosen position on a scale 27 having three distinct portions,viz for flash exposures (27a), for automatic exposure control operation (27b), and for bulb exposures (27c),and the ring is held in the selected position by a spring 29 engaging in fixed notches 28 (extent incomplete as shown). When set to automatic operation as shown, on release of a spring-driven plunger 5 by depressing the slide 50, the plunger descends until arrested by the stepped cam 4 thereon engaging the needle 3 of the exposure meter galvanometer 2 and in its descent rotates the ring 7, by engaging the projection 39, to close down the diaphragm. The slide 50 may either by locked in the depressed position so as to enable a separate shutter release to be operated or the last part of the depression of the slide may itself release the shutter. The exposure meter galvanometer may be rotatable by a knob 51 to take account of film sensitivity. When the ring 6 is set for bulb or flash exposures, automatic control must be rendered ineffective, as by causing as shown the spring 17 to rotate the ring 7 to move the projection 39 out of the path of the plunger 5. When the bulb exposure range 27c is used, the diaphragm is set by hand, the ring 7 being held stationary by its edge 22 engaging a fixed pin 23 so that the ring 6 moves to provide the chosen aperture. When set to the flash exposure range 27a, the ring 6 has been rotated so that the free pivot 40 of the linkage 19, 20 lies radially inwards of a lever 34, the position of which is controlled by a cam surface 32 on a rotatable ring 30 bearing a distance scale and is connected to the camera focusing mechanism. The diaphragm aperture is thus adjusted, after setting the flash factor on scale range 27a by movement of the ring 6,by movement of the distance scale ring 30 causing the linkage 19, 20 to move the ring 7. In a modification the ring 30 and lever 34 may be coupled by a pin-and-slot connection. Reference is also made to applying the invention to cameras with semi-automatic exposure value setting, the shutter speed being preselectable and ring 7 coupled to a follow-up pointer for the needle 3, and to cameras without exposure value setting, the galvanometer 2 and associated mechanism being omitted.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA36290A DE1121458B (en) | 1960-12-15 | 1960-12-15 | Aperture arrangement for photographic cameras |
Publications (1)
Publication Number | Publication Date |
---|---|
GB984434A true GB984434A (en) | 1965-02-24 |
Family
ID=6929558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4408361A Expired GB984434A (en) | 1960-12-15 | 1961-12-08 | Photographic camera |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH390677A (en) |
DE (1) | DE1121458B (en) |
GB (1) | GB984434A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1263494B (en) * | 1962-04-19 | 1968-03-14 | Zeiss Ikon Ag | Photographic camera or shutter with automatic flash |
DE1230309B (en) * | 1964-04-30 | 1966-12-08 | Zeiss Ikon Ag | Single-lens reflex camera with interchangeable lenses and with a camera-side aperture setting, preselection, storage and scanning device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1469763A (en) * | 1920-11-15 | 1923-10-02 | Ward H Snyder | Diaphragm |
-
1960
- 1960-12-15 DE DEA36290A patent/DE1121458B/en active Pending
-
1961
- 1961-12-01 CH CH1401961A patent/CH390677A/en unknown
- 1961-12-08 GB GB4408361A patent/GB984434A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH390677A (en) | 1965-04-15 |
DE1121458B (en) | 1962-01-04 |
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