Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed

Full Title

Projectors or projection-type viewers; Accessories therefor (devices for changing pictures G03B23/00) > Details > Details specially adapted for motion-picture projection (with film moving continuously through the gate G03B41/02) > Driving mechanisms > Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed

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• G03B 21/46 affording adjustment for framing
• G03B 21/48 for altering frame speed; for regulating constancy of film speed