Self-blimped motion picture camera
OwnerJacob G. Monroyinventor
Life of this patent
Estimating the term…
Abstract
A compact self-blimped motion picture camera is achieved by mounting all drive train components on a mounting frame which together with a truncated conical lens support floats within the camera body. The lens support includes a forward annular lens mount and a generally cylindrical section the rear end of which is affixed to the mounting frame. The lens support is truncated in a 45.degree. plane that intersects the cylinder periphery just rearward of the lens mount and intersects the lens support rear end plane in a line that crosses the cylindrical axis. A rotating shutter and mirror assembly includes a sector-shaped mirror that rotates in a plane immediately behind the lens support truncation plane. Noise is minimized by using only belt and pulley drive components and only sleeve bearings.
Claims9
An unblimped motion picture camera comprising:
- a housing,
- a mounting frame floatingly, resiliently shock mounted within said housing, said frame including a plate to which all drive train components are mounted, and a forward panel affixed to said plate perpendicularly thereof, said drive train components consisting of:
- a motor,
- an idler assembly, including a shaft having an axis parallel to that of said motor and perpendicular to said frame, said shaft being journal mounted within sleeve bearings, there being a driven pulley and two driver pulleys affixed to said shaft,
- a drive pulley for a film transport movement,
- a first belt connecting said motor, said idler assembly driven pulley and said transport movement drive pulley,
- a film-take-up reel drive clutch mechanism mounted on said plate and including a clutch drive pulley,
- a second belt connecting one of said idler driven pulleys to said clutch drive pulley, said belt being arranged so that the rotational direction of said clutch mechanism is opposite to said motor,
- a rotating shutter mechanism mounted to said frame forward panel, said shutter mechanism having a drive shaft extending rearwardly of said forward panel and attached to a pulley, and
- a third belt extending from the other idler driven pulley and being arranged to engage said shutter mechanism pulley,
- said motor, said idler assembly, said clutch mechanism, said film transport movement drive pulley and said shutter mechanism drive shafts all having sleeve bearings.
An unblimped motion picture camera comprising:
- a housing including a body and a forward, generally cylindrical front end section attached to said body and having a forward end that is open to permit a lens to project therethrough,
- a mounting frame floatingly, resiliently shock mounted within said housing, all of the camera drive train components being mounted to said mounting frame, said mounting frame including a rigid plate and a generally planar shutter panel rigidly, perpendicularly attached to the front end of said plate,
- a truncated cylindrical lens support rigidly attached to said shutter panel, said lens support consisting of a forward annular lens mount, an intermediate generally cylindrical section and a rear flange which abuts against and is rigidly fastened to said shutter panel, said intermediate section being truncated in a plane disposed at substantially a 45.degree. angle to the axis of said lens support, the plane of truncation intersecting the outer periphery of said cylindrical lens support just rearward of said forward annular lens mount, the line defined by the intersection of said truncation plane and the plane of said rear flange being in close proximity to the intersection of the axis of said lens support and said rear flange plane, the forward annular lens mount being resiliently, concentrically, floatingly supported within the cylindrical forward end of said housing, and
- a rotating shutter/mirror assembly including a sector-shaped rotating mirror mounted to rotate in a plane parallel to and immediately rearward of said truncation plane, sectors of said mirror rotating into the lens light path alternately to reflect light to a viewer and to permit passage of light to film in said camera, said shutter/mirror assembly being mounted to said shutter panel.
Dependencies are inferred from the claim text.