Optics: motion pictures – With plural picture sizes and types
Patent
1977-03-23
1979-03-20
Hayes, Monroe H.
Optics: motion pictures
With plural picture sizes and types
352162, 352169, 352194, 352221, 352224, G03B 4100, G03B 148
Patent
active
041451279
ABSTRACT:
A modular film transport and control mechanism for selectively advancing either regular 8mm or super 8mm perforated motion picture film through a projection gate is provided. The module comprises a film transport shuttle having a film engaging claw biased for engagement with the perforations of the film, a rotatable drive cam in operative engagement with the shuttle to reciprocally move the claw along horizontal and vertical paths to advance the film through the projection gate, and a pivotally mounted projection mode shifter interposed between the shuttle and the cam to transmit the desired horizontal motion from the cam to the shuttle, and selectively movable between at least two positions along a surface of the cam to change the mode of operation from normal projection to still projection. A control linkage connected to the shifter permits manual selection of the desired operating mode. The module also comprises a rotatable shutter mounted on a common shaft with the shuttle drive cam. The shutter has a weighted outer peripheral ring to provide additional inertial force for driving the shuttle. A projection gate-framer assembly comprising a pair of elongated plates having suitable projection apertures, and defining a passage therebetween for the film is slidably mounted on the module for selective movement between a position for projecting regular 8mm film and a position for projecting super 8mm film. A manually adjustable screw bears against an inclined cam surface in each of said positions to properly locate the selected projection aperture with respect to the film frames.
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Lach Robert E.
Loofbourow Donald I.
GAF Corporation
Hayes Monroe H.
Kehm Walter C.
Mohr J. Gary
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