US 4,143,952 AGranted

Aperture assembly

AssigneeNihon Beru-Haueru Kabushiki Kaisha (Bell & Howell Japan, Ltd.)

InventorsYukio Katahira, Toshiaki Morimoto

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Abstract

An aperture assembly is described for use in a motion picture camera, parularly a camera using film cartridges and requiring an aperture assembly with a very thin profile. The aperture assembly includes a thin metal base plate to provide strength for the assembly and for alignment of aperture components thereon. The aperture components include a thin molded aperture piece and a pair of thin molded cartridge alignment shoulders, all mounted on one side of the base plate. The base plate and the aperture piece both have aligned exposure windows through which the film is exposed and aligned slits for receiving a shuttle tooth for advancing the film. Each of the cartridge alignment shoulders has an internal groove communicating with a slit in the base plate for receiving a shuttle foot. A shuttle and a side tension member for use with the aperture assembly are also described.

Claims7

Dependent claims

In a motion picture camera for transporting cartridge-contained film past an aperture by means of a shuttle having a film advancement claw for advancing the film and a pair of shuttle feet, a thin aperture assembly for holding the film in alignment with the aperture and for holding the shuttle in alignment with the film, comprising:

a thin metal base plate having top and bottom sides, an exposure window, a slit elongated in the direction of film feed for receiving a shuttle claw from the bottom side of said base plate, and a pair of elongated openings spaced apart in the direction of film feed;
a thin, molded aperture piece fixedly mounted on the top side of said base plate and having an exposure window and a shuttle claw slit aligned, respectively, with the exposure window and slit of said base plate;
a pair of cartridge alignment shoulders fixedly disposed on the top side of said base plate, each shoulder situated over one of the elongated openings in said base plate and having an internal, downwardly opening, elongated groove aligned with one of the elongated openings in said base plate for receiving a shuttle foot extending from the bottom side of said base plate;
whereby a thin yet strong aperture assembly is provided for maintaining alignment among the film, the exposure window and the shuttle.

1 more element

In a motion picture camera for transporting film contained in a film cartridge past an aperture, an aperture and film advancement assembly, comprising:

a thin metal base plate having top and bottom sides, an exposure window, a shuttle claw slit elongated in the direction of film feed, and a pair of elongated openings spaced apart in the direction of film feed;
a thin, molded aperture piece fixedly mounted on the top side of said base plate and having an exposure window and a shuttle claw slit aligned respectively with the exposure window and slit of said base plate;
a pair of cartridge alignment shoulders fixedly disposed on the top side of said base plate, each shoulder situated over one of the elongated openings in said base plate and having an internal, downwardly opening groove aligned with one of the elongated openings in said base plate;
a shuttle having a substantially planar body portion, a shuttle claw and a pair of shuttle feet extending normally to the body portion, said shuttle being disposed for sliding motion on the bottom side of said base plate and contoured such that the shuttle claw extends upwardly through the shuttle claw slits in said base plate and aperture piece for engagement with the film and the shuttle feet extend upwardly through the elongated openings in said base plate and into the downwardly opening grooves in said shoulders.

1 more element

Dependencies are inferred from the claim text.