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 #:
000419
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
Something wrong or inaccurate about this page? Let us Know!

Thanks for helping us continually improve the quality of the Lantern search engine for all of our users! We have millions of scanned pages, so user reports are incredibly helpful for us to identify places where we can improve and update the metadata.

Please describe the issue below, and click "Submit" to send your comments to our team! If you'd prefer, you can also send us an email to mhdl@commarts.wisc.edu with your comments.




We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.

Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.

402 O. K. BUCK AND J. C. ALBERT [j. s. M. p. B. fashion as to use the generator itself as the impedance that we could secure the same results. The final outcome was a condenser of 2100 microfarads installed on each side of the generator. Fig. 2 shows the direct current voltage and current as a straight line; the ripple has been reduced to the point where it is not rneasurable by. means of our oscillograph. Our method in arriving at this solution of the problem has been one of experimentation, or cut and try plus a certain amount of FIG. 2. Oscillograph record of current and voltage with filter. theoretical calculation. I do not believe that there is available any precedent by which we could govern our work and predetermine the results that would be secured. We are continuing the experimentation and hope to have available within a very short while ways and means of calculating the amount of condenser capacity necessary and method of connection for the various types and makes of generators. The condenser was built by the use of lightning arrester cones, of which we had a large supply in our warehouse. These were convenient for determining the proper values. The ultimate design of this electrolytic condenser will undoubtedly be worked out by the manufacturers. The main characteristics will be large capacity, low resistance, and compactness.