Journal of the Society of Motion Picture Engineers (1930-1949)

Page scan 00083 from Journal of the Society of Motion Picture Engineers

Record Details:

Title:
Journal of the Society of Motion Picture Engineers
Date:
1930-1949
Publisher:
New York, N.Y. : The Society
Volume:
Journal of the Society of Motion Picture Engineers
Leaf #:
00083
Language:
English
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Prelinger Library
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
The Journal of the Society of Motion Picture Engineers (SMPE)Êdocuments the technological progress of the film industry, highlighting technical developments in production and exhibition. Of special interest are articles about special effects, theater practices, lighting, and the introduction of the 16mm format. Initially titled "Transactions of the Journal of the Society of Motion Picture Engineers."Digitized by the Prelinger Library and the Library of Congress Motion Picture, Broadcasting and Recorded Sound Division.
Date Added:
July 19, 2022
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76 STONE January The ventilation of the lamphouse is of the natural gravity type, but the flow of air is so directed that even after long periods of operation the film temperature in the aperture does not rise above 150 degrees Fahrenheit. Contacts with users of slidefilm equipment and the answers toa questionnaire indicated that the one almost universal difficulty was that of threading of the film through the projector. Operators could Fig. 2 not close the gate over the sprocket and keep the film in place until the gate was closed. The result was torn and punctured film and a frustrated operator while he fumbled through several attempts to get the film started properly through the aperture and over the sprocket. The answer to this difficulty was the development of a hinged film guide over the sprocket. This guide can be swung back away from the sprocket, the film positioned over the sprocket and the guide placed against the film without any danger of the film getting out of place when the lens barrel is closed. This improvement eliminates the possibility of damaged film entirely and greatly simplifies the job of threading the projector.