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US 2002/0172519 A1Published application
Focal-plane shutter for cameras
AssigneeNidec Copal Corporation
InventorsShigemi Takahashi, Yuichirou Usuda
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AssigneeNidec Copal Corporation
InventorsShigemi Takahashi, Yuichirou Usuda
Estimating the term…
A focal-plane shutter for cameras is provided with a single blade chamber between two base plates, each having an aperture for exposure at about the middle thereof, or two blade chambers into which the single blade chamber is partitioned between the two base plates by an intermediate plate having an aperture for exposure at about the middle thereof. A shutter blade group placed in each of the blade chambers is constructed with a plurality of arms whose ends are pivotally mounted to one of the two base plates on the side of the aperture and at least one blade pivotally supported by the arms through individual joint shanks so that working paths of the joint shanks does not run inside the apertures of the base plates. In addition, a wall is provided on at least one of the two base plates so as to project toward the blade chamber side, between the aperture provided in one of the two base plates and the working region of the arms, along the edge of the aperture, and has an inclined face directed toward the aperture of an opposite base plate.
A focal-plane shutter for cameras provided with a single blade chamber between two base plates, each having an aperture for exposure at about a middle thereof, or two blade chambers into which said single blade chamber is partitioned between said two base plates by an intermediate plate having an aperture for exposure at about a middle thereof, wherein a shutter blade group placed in each of said two blade chambers is constructed with a plurality of arms whose ends are pivotally mounted to one of said two base plates at a side of said aperture and at least one blade pivotally supported by said arms through individual joint shanks so that working paths of said joint shanks fail to run inside apertures of said two base plates, and wherein a wall is provided on at least one of said two base plates so as to project toward a blade chamber side, between said aperture provided in one of said two base plates and a working region of said arms, along an edge of said aperture, and has an inclined face directed toward said aperture of an opposite base plate.
A focal-plane shutter for cameras provided with a blade chamber between two base plates, each having an aperture for exposure, to place a shutter blade group in said blade chamber, or two blade chambers into which said blade chamber is partitioned between said two base plates to place a different shutter blade group in each of said two blade chambers, wherein at least one of said two base plates is provided with adhesive means on surfaces with which said shutter blade group has no contact to operate.
Dependencies are inferred from the claim text.