A condensed course in motion picture photography ([1920])

Record Details:

Title:
A condensed course in motion picture photography
Date:
[1920]
Author:
New York Institute of Photography
Publisher:
New York, New York Inst. of Photography
Volume:
A condensed course in motion picture photography
Leaf #:
00096
Language:
English
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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THE MOTION PICTURE CAMERA and simple loop into the gate. From the bottom of the gate it goes upward and to the right in a long single loop, without a twist, to the take-up sprocket, where it feeds directly into the take-up retort. The return, or true, loop is the same sort of a loop as would be formed by wrapping a piece of film in a spiral direction about a round object, while the simple loop of straight threading is merely a slackness in the film without any other twist or turn. In addition to the simple directions given here there are a number of variations in different cameras which provide rollers for guiding the film in various directions. For example, in the old style Gillon a roller is provided which brings the film in a straight line from the feed retort, from whence it passes over another roller before passing to the feed sprocket ; the object of the second roller being to engage the film around a greater part of the circumference of the feed sprocket, in which only two teeth would engage the film around a greater arc of the sprocket's circumference. 63