Journal of the Society of Motion Picture Engineers (1930-1949)

Page scan 000653 from Journal of the Society of Motion Picture Engineers

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 #:
000653
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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650 KOLB December mean net flux of 0.99 watt per square millimeter. Such trims were supplied by the National Carbon Company. Vycor protection plates for the condensers were used, as recommended by Daily,3 since these experimental trims burning close to the condenser tend to cause excessive pitting and spattering of the silica condenser lens. Furthermore, a 1/8 inch thickness of Vycor is effective in preventing solarization and the resulting loss in transmission of the silica condenser. ~: V Fig. 5 — Experimental film trap for air cooling. A set of nozzles has been installed to show one of many possible methods of mounting nozzles to direct air at the emulsion side and at the base side of the film. Our test projector is a Simplex E-7 with the gate modified as in Fig. 5 to permit the introduction of air-cooling nozzles. The projector was operated with a 60 per cent rear shutter and over-all shutter transmission to the screen of 50 per cent. The air supply was obtained from the pressure tank of an air compressor, with the air throttled down so that it entered the nozzles at a pressure of only a few pounds per square inch. For the pressure and flow rates found necessary in the particular equipment tested, a rotary