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

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 #:
000565
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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548 STANDARDS ADOPTED [j. s. M. P. E. 17. Sound Track. The location and width of the sound track on combined sound and picture positives shall be as shown in Chart 14. ADOPTED DEFINITIONS 1. Number of Teeth in Mesh. The number of teeth in mesh with the film (commonly referred to as "teeth in contact") shall be the number of teeth in the arc of contact of the film with the drum of the sprocket, the pulling face of one tooth being at the origin of the arc, as shown in Chart 15. 2. Safety Film. The term "Safety Film," as applied to motion picture materials, shall refer to materials which have a burning time greater than ten (10) seconds and which fall in the following classes: (a) support coated with emulsion, (b) any other material on which or in which an image can be produced, (c) the processed products of these materials, and (d) uncoated support which is or can be used for motion picture purposes in conjunction with the aforementioned classes of materials. The burning time is defined as the time inseconds required for the complete combustion of a sample of the material 36 inches long, the determination of burning time being carried out according to the procedure of the Underwriter's Laboratory. This definition was designed specifically to define Safety Film in terms of the burning rate of the commercial product of any thickness or width used in practice. The test of burning time, therefore, shall be made with a sample of the material in question having a thickness and width at which the particular material is used in practice. RECOMMENDED PRACTICE 1. Aperture Size. The existing ratio of 3 to 4 between height and width of picture should be retained when introducing any new size of film.