GB859205A - Photographic camera operatively connected with an electrical exposure meter - Google Patents
Photographic camera operatively connected with an electrical exposure meterInfo
- Publication number
- GB859205A GB859205A GB24700/57A GB2470057A GB859205A GB 859205 A GB859205 A GB 859205A GB 24700/57 A GB24700/57 A GB 24700/57A GB 2470057 A GB2470057 A GB 2470057A GB 859205 A GB859205 A GB 859205A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflectors
- viewed
- flap
- pointer
- diaphragm
- 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
- G03B7/04—Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device, e.g. by restoring point to a fixed associated reference mark
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication In Cameras, And Counting Of Exposures (AREA)
- Exposure Control For Cameras (AREA)
Abstract
859,205. Exposure meters. KOBAYASHI, H. Aug. 6, 1957 [Aug. 7, 1956; Sept. 25, 1956; Feb. 28, 1957], No. 24700/57. Class 40(3). [Also in Group XX] The pointer of a built-in exposure meter is viewed, in the camera viewfinder by reflection from reflectors, movable in response to the adjustment of a film speed indicator, the aperture of the objective diaphragm and the shutter speed, in relation to a fixed mark so that movement of the reflectors brings about an apparent displacement of the pointer. As shown, the exposure meter pointer P is illuminated from above by an arcuate window and moves over an arcuate translucent plate 3. It is viewed from viewfinder eye aperture 42 by means of reflectors 12, 11, 9, 8, 6 and 5, reflectors 9 and 6 being movable rectilinearly in accordance with the shutter speed and film speed respectively and reflectors 12 and 11 being angularly movable in accordance with the diaphragm aperture. The reflectors are connected to a shutter speed setting spindle in the camera body and a toothed diaphragm adjusting ring in the lens mount by bevel and pinion drives (Figs. 2 and 12-14, not shown). Preferably, the range of adjustment of the diaphragm and shutter is greater than that corresponding to a single traverse of the pointer between the limits of its movements and successive traverses are viewed by reflector 18 (Fig. 6) replacing reflector 5 and having mutually inclined reflecting surfaces so that successive traverses viewed by means of different surfaces appear to be mutually displaced longitudinally. For the brightest objects, the photo-cell is masked by apertured flap 1, for less bright objects the flap 1 is moved to the position shown in Fig. 8 and for dull objects a second photo-cell is connected in parallel with the original cell and the flap is further raised. The movement of flap 1 is imparted to reflector 18 by means of arms 27, 28 and sector gears 32, 32<SP>1</SP> and pinion 35 on shaft 19.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP859205X | 1956-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB859205A true GB859205A (en) | 1961-01-18 |
Family
ID=13872207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24700/57A Expired GB859205A (en) | 1956-08-07 | 1957-08-06 | Photographic camera operatively connected with an electrical exposure meter |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB859205A (en) |
-
1957
- 1957-08-06 GB GB24700/57A patent/GB859205A/en not_active Expired
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