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US2836423A
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Sound head unit of a motion picture projecting and sound reproducing apparatus
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DE955828C
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Image projector for single images that are stacked in a storage container
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GB761549A
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Improvements relating to an optical slide projector
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US2784817A
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Clutch for slide projectors
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US2756628A
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Pressure plate and lens mounting for motion picture projecting apparatuses
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US2657366A
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Mechanism for facilitating the removal of a lamp from its socket
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US2668879A
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Magnetic sound pickup recorder head and support therefor
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US2705437A
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Magazine type slide projector
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US2713642A
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Mountings for photo-cells for use in connection with a sound reproducing motion picture projecting apparatus
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US2613573A
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Mechanical dowser for motionpicture projecting apparatus
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US2617892A
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Light transmission mechanism
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US2633056A
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Intermittent mechanism for motion-picture projecting mechanisms
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US2617327A
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Film pressure shoe and aperture plate assembly for motion-picture projecting apparatus
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US2639146A
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Film guide roller for motion-picture projecting machines
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US2674454A
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Means or mechanism for maintaining a film strip upon a film sprocket
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US2633356A
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Mechanism for forming a loop in the web of a film of a motion-picture machine
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US2497147A
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Lens barrel
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US2418236A
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Foot adjustment for cabinets
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US2448912A
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Overrunning clutch
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US2420444A
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Intermittent mechanism
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