Motion picture projection : an elementary text book ([1922])

Page scan 000217 from Motion picture projection : an elementary text book

Record Details:

Title:
Motion picture projection : an elementary text book
Date:
[1922]
Publisher:
New York, Falk
Volume:
Motion picture projection
Leaf #:
000217
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Date Added:
July 19, 2022
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MOTION PICTURE PROJECTION A number of reels have been invented to get rid of the need of rewinding. The idea embodied in them is to start the winding on the outside. Thus a spider may be imagined so constructed as to get smaller in radius as the film is wound on it. Then the new layers of film would have to slip in between the collap> on their inside surface and the preceding layer of film on the outer surface. A number of these have been patented and they are constantly appearing in the patents granted. But rewinding is not a long operation and it not only gi chance for a quick inspection of the condition of the film hi be supplemented by the addition of a cleaning appliance. Through this the film is drawn as it is rewound. It is shown elsewhere in this book. THE SiMPLEX-BoYLAN REEL The Simplex-Boylan reel is quite an innovation. The standard rotation of the lower reel is effected by a fi fully described elsewhere. This reel has a fractional dri tl con- struction, which will do the work of the regular take-up, tcr may be set as tight as possible, but the reel we speak of will do the take-up without it. REWINDING THE FILM After a reel has been exhausted of film, the film, which was on it when it was put into the up|>cr reel box, is trar. to tin- lower reel. But the film now on the lower reel is wound in the FILM REWINDER 214