Transactions of the Society of Motion Picture Engineers (1929)

Record Details:

Title:
Transactions of the Society of Motion Picture Engineers
Date:
1929
Publisher:
New York : Society of Motion Picture Engineers
Volume:
Transactions of the Society of Motion Picture Engineers (1929)
Leaf #:
00042
Language:
English
Subjects:
motion pictures, Cinematography -- Periodicals
Collection:
Technical Journals
Format:
Periodicals
Contributor:
Library of Congress, MBRS, Moving Image Section
Sponsor:
Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division
Coordinator:
Media History Digital Library
Description:
Preceeded by an unnumbered issue published in 1916 called: Incorporation and by-laws
Date Added:
November 17, 2022
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32 Transactions of SM.P.E., Vol. XIII, No. 37, 1929 and a clearance of 0.017 inch between the inside edge of the sound track proper and the edge of the picture, leaving for the sound track proper a space 0.100 inch wide. The center line of this sound ti'ack lies at a point 0.243 inch from the edge of the film and 0.054 inch from the inside edge of the perforations. This may be defined as the position of the center line of the sound track space. For variable density recording this space is utilized as shown in ¥'m. 1. Fig. 1. This recommendation fixes the position of the center line of the sound track with respect to the edge of the film leaving a certain amount of latitude for the utilization of the available space. It does, however, fix definitely the essential dimensions so that films made according to this standard will fit any projector made to meet this dimension. It is recommended that the distance between center of picture gate and scanning line shall be 14.5 inches, the latter being below. In sprocket design the expression ''number of teeth in contact with the film" has been used frequently but no definition of this has been given. It is proposed to define this term as follows :