Details

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Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Details

Child Classifications

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• G03B 21/142
• G03B 21/145
• G03B 21/147
• G03B 21/16 Cooling; Preventing overheating
• G03B 21/18 Fire preventing or extinguishing
• G03B 21/20 Lamp housings
• G03B 21/22 Soundproof bodies
• G03B 21/26 Projecting separately subsidiary matter simultaneously with main image
• G03B 21/28 Reflectors in projection beam
• G03B 21/30 adapted to collapse or fold, e.g. for portability
• G03B 21/32 Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02)
• G03B 21/53 Means for automatic focusing, e.g. to compensate thermal effects