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US1746386A
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Film-trapdoor lock
|
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US1812865A
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Valve for magazines for picture films
|
|
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Film trap and film trapdoor
|
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Fire shutter automatic release
|
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Dowser or diaphragm for motion-picture apparatus
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Framing mechanism
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Governor
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Framing mechanism for cinematographic projectors
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Intermittent couple and adjustment
|
|
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Method of and apparatus for projection of motion pictures
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|
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Slide carrier
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US1424735A
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Magazine for cinematographic projectors
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