MOTION-PICTURE PHOTOGRAPHY 



681 



The motion of the film is continuous from the feed magazine to the sprocket wheel 

 and remains continuous on the wheel and later between the wheel and the take-up 



Fig. 26. — External view of camera, left side. 



roll, but in the gate it must be driven intermittently so that it may be at rest during 

 the periods of exposure. The intermittent mechanism is shown schematically as a 

 claw actuated by a cam. The alternation of movement and rest requires a revolving 



