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Automatic wind and rewind system for strip materials
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Motion-picture apparatus of the optical compensating type
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Motion-picture apparatus of the optical compensating type
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Optical compensator
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Slack controller
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Motion picture apparatus
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Motion picture apparatus
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Endless loop film magazine
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Prefocus projection lamp
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Motion picture apparatus
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Improvements in or relating to continuous feed motion picture apparatus
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Lens obturating device
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Optical projection system
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Motion picture film feeding device
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Ribbon feeding mechanism
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Adjustable optical system
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Improvements in or relating to lens systems particularly adapted for use with optical compensators in motion picture apparatus
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Improvements in or relating to continuous-feed motion picture apparatus provided with optical compensators
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Optical apparatus
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