Journal of the Society of Motion Picture and Television Engineers ( Volume: 56, Issue: 5, May 1951)

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The Cooling of Film and Slides in Projectors

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 56, No. 5, pp. 538–550
Abstract: A heat-absorbing filter is of primary importance for cooling film or slides, and experimental results are given of the performance of various types. A good filter, combined with a more powerful lamp, allows the screen illumination to be doubled without affecting the film. A study of the heat flow within the film during exposure leads to estimates of the efficacy of methods of film cooling which may be used in the future. The theory of cooling slides shows that best results are given by blowing air at very high velocities across the slide, to remove the “blanket” of stagnant air adhering to the surfaces. A practical slide cooler is described, and its performance figures given.
Publication Date: 1951-05-01
DOI: 10.5594/J06318
ISSN: Print: 0898-042X
Link: https://doi.org/10.5594/J06318
Author(s): Hugh McG. Ross
Copyright: © 1951 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

1. Ross Hugh McG. , “The heating of “film and slides in projectors,” J. Brit. Kinemat. Soc. , vol. 16 , pp. 38 – 54 , Feb. 1950 . EXTERNAL
10. Patents Pending. EXTERNAL
11. Ross Hugh McG. , “A new still process projector,” J. Brit. Kinemat. Soc. , vol. 17 , pp. 159 – 170 , Nov. 1950 . EXTERNAL
2. Kolb F. J. , “Air cooling of motion picture film for higher screen illumination,” Jour. SMPE , vol. 53 , pp. 635 – 664 , Dec. 1949 . EXTERNAL
3. Cooper B. S. Hawkins F. S. , “Spectral characteristics of light sources for facing and degradation tests,” J. Soc. Dyers and Colourists , vol. 65 , pp. 586 – 596 , Dec. 1949 ; see also: F. T. Bowditch and A. C. Downes, “Spectral distributions and color temperatures of the radiant energy from carbon arcs,” Jour. SMPE, vol. 30, pp. 400–409, Apr. 1938; R. G. Linderman, C. W. Handley and A. Rodgers, “Illumination in motion picture production,” Jour. SMPE, vol. 40, pp. 333–367, June 1943; W. Finkelnburg, “The high current carbon arc,” FIAT Final Report 1052, PB-81644, Office Technical Services, U.S. Dept. of Commerce, Washington, D.C., 1949; C. E. Greider and A. C. Downes, “The carbon arc as a source of artificial sunshine, ultraviolet and other radiation,” Trans. Illum. Eng. Soc. , (Amer.), vol. 27 , pp. 637 – 653 , Sept. 1932 . EXTERNAL
4. Dreisch Th. , “Die Absorptionko-effizienten einiger flüssigkeiten und ihrer dämpfer im ultraroten unter-halb 3μ,” Zeit. für. Physik , vol. 30 , pp. 200 – 216 , 1924 ; and International Critical Tables . vol 5, p. 269, McGraw-Hill, New York. EXTERNAL
5. Data Sheets Nos. 5.1315 and 5.131, and Catalogue of Coloured Optical Glasses , Chance Bros., Ltd. , Smeth-wick, England . EXTERNAL
6. Designed by Taylor , Taylor and Hobson, Ltd. , England . Patents Pending. EXTERNAL
7. Zavesky R. J. Null M. R. Lozier W. W. , “Study of radiant energy at motion picture film aperture,” Jour. SMPE , vol. 45 , pp. 102 – 108 , Aug. 1945 . EXTERNAL
8. Carver E. K. Talbot R. H. Loomis H. A. , “Effect of high-intensity arcs on 35-mm film projection,” Jour. SMPE , vol. 41 , pp. 69 – 87 , July 1943 . EXTERNAL
9. The theories of cooling in this paper are based on Heat Transmission , McAdams W. H. , McGraw-Hill , New York , 1942 . EXTERNAL

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Hugh McG. Ross; The Cooling of Film and Slides in Projectors, Journal of the Society of Motion Picture and Television Engineers ( Volume: 56, Issue: 5, May 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J06318

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Hugh McG. Ross; The Cooling of Film and Slides in Projectors, Journal of the Society of Motion Picture and Television Engineers ( Volume: 56, Issue: 5, May 1951); SMPTE, 1951. Available at https://doi.org/10.5594/J06318

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<span class="citation">Hugh McG. Ross; <cite>The Cooling of Film and Slides in Projectors</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 56, Issue: 5, May 1951); SMPTE, 1951. Available at <a href="https://doi.org/10.5594/J06318" target="_blank" rel="noopener">https://doi.org/10.5594/J06318</a></span>

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Hugh McG. Ross; The Cooling of Film and Slides in Projectors, Journal of the Society of Motion Picture and Television Engineers ( Volume: 56, Issue: 5, May 1951); SMPTE, 1951
doi: 10.5594/J06318
url: https://doi.org/10.5594/J06318

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Hugh McG. Ross; <cite id="bib-10-5594-j06318">The Cooling of Film and Slides in Projectors</cite>, Journal of the Society of Motion Picture and Television Engineers ( Volume: 56, Issue: 5, May 1951); SMPTE, 1951
<span class="doi">10.5594/J06318</span>
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