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 #:
000420
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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April, 1930] ELIMINATION OF COMMUTATOR RlPPI,E 403 In conclusion I might mention that the Department of Water and Power is not interested in promoting the use of either incandescent or arc lighting. It is our desire to assist the studios in securing the best results from the consumption of the energy we sell them. If the producers desire to use arcs for production we feel that the way has been cleared for them in a satisfactory manner. For the various types of photography they can now use the various types of lighting equipment, without fear of microphone interference. DISCUSSION MR. PAL,MER: I am very much interested in what Mr. Buck has to say because we have had the same trouble in our studio in running arcs on d. c. generators. We get a whistle from them, and I should like to know what the extra equipment costs for a 500 kw. generator. MR. BUCK: We have not worked out the design of the filter. We wanted to take it up with the manufacturers, for we feel it is a manufacturing problem. We have decided for ourselves, if necessary, we can construct the filters for this 326 KDA generator and install them for less than $500. MR. STOL,L,ER: I might mention that this problem of filtering the a. c. ripple out of a d. c. generator is an old telephone problem in connection with the charging of the central office storage batteries. There is in the Bell System Technical Journal considerable literature on the subject of choke coils and electrolytic condensers.