US Patent: 2,575,902
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| Air Vent And Focusing Screen Support For Bellows Type Cameras
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Patentees:
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| Victor Yager (exact or similar names) - Long Island City, Queens County, NY |
| Jacob Woerman (exact or similar names) - Glendale, Queens County, NY |
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Patent Dates:
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| Applied: |
Jun. 26, 1947 |
| Granted: |
Nov. 20, 1951 |
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Patent Pictures:
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Joel Havens
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Description: |
| This camera was sold by the tradename of Merridian.
Abstract:
One of the principal objects of the invention is the provision in a camera having a bellows between the lens and the means for supporting light sensitive medium therein which includes novel means for allowing the air to enter the bellows when the lens is moved in a direction away from said light sensitive supporting means and which allows air to escape from the bellows when the lens is moved toward said light sensitive supporting means. Another object of the invention is the provision in a camera of the character described of a round lens support adapted to be quickly placed in operative position on, or removed from the camera front plate. The round lens support adapts itself with greater facility to the forming of a light-trap between said support and the front plate of the camera, and may be secured thereto or disengaged therefrom by means of a single readily accessible knob. Yet another object of the invention is the provision in a camera of the character described, of a discontinuous track which includes an accessory track and a bed track whereby the accessory track may be used with wide angle lenses, and the bed may be dropped when wide angle lenses are used. Yet another object of the invention is the provision in a camera of the character described, of a ball and socket arrangement between the swing back adjusting rods and the casing of the camera, and means on said casing for clamping said rods in any adjusted position. Another object of the invention is the provision in a camera, of a camera body, a drop bed hingedly connected thereto, link members pivotally connected to said bed, the connections therebetween including eccentric bushings for aligning said bed to exactly 90 degrees with the axis of the camera body, said eccentric bushings being free to be moved while the camera is being calibrated and being subsequently locked in the adjusted positions during said calibration, said links being adjustably connected to the camera body in a plurality of relations at least one of which positions said bed 90 degrees with respect to the vertical plane of the camera body.
Claim:
In a camera, a body. a back plate on said body, a bed hingedly connected to said body, a lens support movable along said bed, a bellows between said lens support and said back plate, a generally rectangular opening formed in said back plate, a plurality of supporting bosses disposed in spaced relation about all sides of said opening, each of said bosses being stepped to provide on each boss a supporting step and an overhanging step, said supporting steps being on s common level, a rectangular focusing screen supported on said steps and confined against lateral movement in either direction on the plane of said steps by said overhanging steps, and spring means oppositely disposed on said back plate engaging said screen and retaining it on said supporting step, the spaces between said bosses and the edges of said back plate and said screen defining areas through which air may pass laterally into and from said bellows as said lens is moved along said bed. |
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