DE Patent: DE-1,083,117
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Aperture Device for Photographic Camera
Blendeneinrichtung Fuer Photographische Kameras
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Patentee:
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| none listed (exact or similar names) - Munich, Munich District, Bavaria, Germany |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 28, 1958 |
| Granted: |
Jun. 09, 1960 |
Espacenet patent
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Joel Havens
Vintage Machinery entry for Friedrich Deckel GmbH
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Description: |
| Abstract:
The invention relates to the adjusting member of the movable diaphragm ring photographic Cameras. The diaphragm ring controlling the diaphragm opening is often loaded by a spring force in order to adjust it return to its original position. This arrangement is made with a force-fit connection of the aperture ring with the associated setting or. Preselection member, e.g. B. on interchangeable lenses or even if the diaphragm device is designed as a pressure or spring diaphragm. In all of these cases it will the spring force is absorbed by a latching device which is attached to the aperture setting or aperture preselection member or is attached to the time setting ring, if this with one or the other link for the purpose Exposure value adjustment is coupled. The permissible spring loading of the diaphragm ring is thus limited by the detent torque on the locked part. According to the invention it is possible to increase the spring load of the diaphragm control ring without having to increase the detent torque on the locked part. This is achieved in that between the latched and a fixed part a compensating spring is attached, which the load on the diaphragm control ring counteracts and relieves the locking device.
Claim:
Adjustment member on photographic cameras, which with a spring-loaded, the aperture regulating control member is coupled and can be locked with respect to a stationary part, marked by a fixed part between it and the the load of the aperture control member counteracting and relieving the locking device compensating spring. |
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