Back to results
US 4,303,328 AGranted
Device for photographic cameras with focal plane shutter
AssigneeVictor Hasselblad Aktiebolag
InventorsKjell-Anders Persson, Lennart Stalfors
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeVictor Hasselblad Aktiebolag
InventorsKjell-Anders Persson, Lennart Stalfors
Estimating the term…
The invention relates to an automatic device for protecting the focal plane shutter of a camera when the camera is open. The film magazine of the camera, alternatively the camera back, is sensed by a member disposed in the camera body and directly or preferably indirectly controlling the shutter electronically. When the camera is opened, the sensing member emits a control pulse, which releases the opening part of the shutter. The opening and closing parts of the shutter then are located on both sides of the film gate of the camera where they are protected against damage. When the camera again is closed, the opening part of the shutter again must be cocked. Alternatively, also the closing part of the shutter can be released by a control pulse released when the camera is being closed. The protective device is lockable. (FIG. 2).
A device for photographic cameras with focal plane shutter, characterized in that on the camera surface facing toward the film magazine, alternatively toward the camera back, a member for sensing the film magazine, alternatively the camera back, is provided which directly or indirectly is coupled to the focal plane shutter for releasing the opening part thereof when the film magazine is being removed, alternatively when the camera back is being opened or removed.
Dependencies are inferred from the claim text.