Practical cinematography and its applications (1913)

Page scan 000126 from Practical cinematography and its applications

Record Details:

Title:
Practical cinematography and its applications
Date:
1913
Publisher:
Philadelphia, Lippincott
Volume:
Practical cinematography and its applications
Leaf #:
000126
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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PRINTING THE POSITIVE 87 enter the gate F. The latter is mounted upon the rear face of a small chamber, the aperture of which is of the size of the cinematograph film image. This aperture is provided on the inside with a small hinged shutter. By opening this one can see that the negative image occupies the full space of the window, or make any other observations. The film is moved intermittently through the printing gate F by the sprocket wheel G, the teeth of which engage with the perforations in the films. The engagement of the films with this sprocket is ensured by the two pressure rollers H. The sprocket G is mounted upon and revolved by the handwheel I—a motor drive can be incorporated if desired—and after being moved beyond this sprocket wheel, the two films divide, the positive film being wound upon a spool or into its dark box, while the negative is wound upon another spool. The movement of the light K, either towards or from the exposure window F, is effected by means of the handle J, which has ten stops corresponding to as many different distances. The lamp moves to and fro along the support L. It will be seen that the Williamson is a simple, straightforward machine. It is soundly con- structed and works admirably. Its achievements are in every way equal to those of the com- plicated and more expensive model manufactured