. Moving pictures : how they are made and worked. THE FILM-MOVING MECHANISM OF A CINEMATOGRAPH CAMERA. The spool of unexposed film i> carried in dark box A. Fiom this it is led over sprockel D, through the gate between the lens and the focussing tube C, where it is exposed. The film is then jerked down the depth of a picture through the gate by claws F, over prockel and into exposed film bo* B where ii is wi mnd on a bobbin. E is thi eyepiei it the foi ussing tulie. vii THE MOVING PICTURE CAMERA 67 the cabinet carries two square compartments, A and B,one above the other. These are for the t
. Moving pictures : how they are made and worked. THE FILM-MOVING MECHANISM OF A CINEMATOGRAPH CAMERA. The spool of unexposed film i> carried in dark box A. Fiom this it is led over sprockel D, through the gate between the lens and the focussing tube C, where it is exposed. The film is then jerked down the depth of a picture through the gate by claws F, over prockel and into exposed film bo* B where ii is wi mnd on a bobbin. E is thi eyepiei it the foi ussing tulie. vii THE MOVING PICTURE CAMERA 67 the cabinet carries two square compartments, A and B,one above the other. These are for the two film boxes,A carrying the unexposed, and B the exposed film. Itwill be noticed that the cinematograph works upon thesystem of roller photography. Indeed, it might bedescribed almost as a semi-automatic application of thefamiliar snap-shot camera using roll-films. The lens is set centrally in the front face of the camera,and carries a screw, by means of which focussing iseffected by moving the lens itself to and fro a short dis-tance within a
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