16-mm sound motion pictures : a manual for the professional and the amateur (1953)

Record Details:

Title:
16-mm sound motion pictures : a manual for the professional and the amateur
Date:
1953
Publisher:
New York : Interscience Publishers
Volume:
16-mm sound motion pictures : a manual for the professional and the amateur
Leaf #:
000487
Language:
English
Subjects:
Motion Pictures, Motion Picture Technology
Collection:
Books
Format:
Books
Contributor:
Niles Essanay Silent Film Museum
Sponsor:
Media History Digital Library
Coordinator:
Media History Digital Library
Description:
Date Added:
April 11, 2024
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SOUND TEANSLATION 471 that its performance is superior to one that does not have it. Just as with other designs, cooperating parts play very important roles in the functioning of the machine and may ruin otherwise good performance. A very common source of trouble is the roller that does not roll. Another is the rubber pad roller with a flat tire. It is not uncommon to find better performance realized in a well-maintained machine with a rigidly coupled flywheel and an oscillatory stabilizer such as the Bell and Howell Utility model (Figs. 112 and 112A) than in a machine with an oil-coupled fly Fig. 112A. Cut-away view of Bell and Howell transport system with oscillatory stabilizer. The flywheel F (at right) is rigidly coupled through shaft S to overhanging film-driven drum D that transports film past scanning light beam. The filament of exciter lamp B is imaged by lens L on sound track of the film that passes around the overhanging drum. After passing through the film, the light beam is reflected by a small mirror (underneath the overhanging film) located a short distance underneath overhanging film. The mirror re-directs light beam to photoelectric cell P connected to input of reproducing amplifier. The film is kept snugly wrapped around the overhanging drum by the spring-loaded oscillatory stabilizer idler I, and the gravity-loaded oscillatory stabilizer G. The film is driven through the sound system loop by the constant speed drive sprockets F1 and F2.