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

Page scan 000276 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 #:
000276
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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1948 SCREENING-ROOM PROJECTION EQUIPMENT 265 properly waxed, in some cases emulsion from "green" film adheres more readily to polished steel shoes than to chrome-plated shoes. Fig. 2 shows the location of the film shoes on the film trap used on the Brenkert BX-80 projector. Also shown are the adjustable Hollywood film guides. Accurate adjustment of these guides allows correct passage of the film through the film trap with negligible lateral motion of the film. These guides may be easily and accurately aligned by means of a gauge which may be purchased from the manufacturer. Ftfm If Fig. 2 — Film trap and gate used with Brenkert BX-80 projector. All three sets of filmtension pads are adjusted easily and simultaneously by one adjusting knob. It can be noted in Fig. 2 that the film gate has been designed for three sets of film-tension pads. An equal amount of tension is applied to each of the two upper sets of pads, but the tension applied to the lower set of pads is somewhat greater, caused by the use of a heavier spring on the lower set of pads. The design and construction of this film gate aids greatly in holding the film steady in the film trap during the time the picture is being projected. This is especially true when a patch is being fed through the trap. One adjusting screw controls the pressure of all pads at the correct ratio. It was stated earlier that the use of high-intensity lamps for some