Cinematographic annual : 1930 (1930)

Record Details:

Title:
Cinematographic annual : 1930
Date:
1930
Publisher:
Hollywood : The American Society of Cinematographers, Inc.
Volume:
Cinematographic annual : 1930
Leaf #:
000456
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Media History Digital Library
Sponsor:
{"Media History Digital Library","Richard Koszarski","Jeff Joseph"}
Coordinator:
Media History Digital Library
Description:
Date Added:
March 21, 2024
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436 CINEMATOGRAPHIC ANNUAL many thousands of dollars annually for a studio of moderate size. In the recording of a disc record one of these wax negatives is placed on the turntable of a disc recording machine, as may be seen in Fig. 3. This turntable is driven through a system of gears FIGURE 3 Wax Recording Machine, Showing Drive Mechanism enclosed in the large gear pot shown directly beneath the turntable by means of a motor which is at all times synchronous with the motor used on the stage to drive the camera so that the proper relative speeds of the wax and film required for synchronism will be maintained. The record speed is 33 1/3 r.p.m. which corresponds to 90 feet per minute traveled by the film in the photography or projection of sound pictures. The large gear pot contains an oil damping arrangement designed to eliminate any small speed variations of the turntable which might other