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 #:
000503
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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SIDE VIEW DIRECT-WRITING EGG. TOP VIEW HEART CAMERA Fig. 1. Diagrammatic representation of the arrangement of equipment used for photographing the heart and electrocardiogram simultaneously. Note that the electrocardiogram is filmed by photographing its reflection in a mirror placed equidistant from the heart and the surface of the electrocardiographic apparatus. on the heart at such a distance that the part of the heart to be studied fills approximately the left two-thirds of the field. The electrocardiographic machine is placed well below the level of the heart and is mounted on a jack so that adjustments in height are possible. The electrocardiographic machine and a first surface mirror are moved into position so that the reflected image of the trace occupies the right one-third of the field. The mirror image of the electrocardiogram will be in focus only if the distance from the surface of the electrocardiographic machine to the mirror is the same as the distance from the mirror to the heart. The mirror is mounted on a stand with a rack-andpinion gear for adjusting its height; worm gears with a 100 to 1 ratio control its rotation and angulation. In this way, very fine adjustments in positioning the mirror are possible. Since we photograph the mirror image of the electrocardiogram, an arrangement of the circuits was made which inverts 494 December 1952 Journal of the SMPTE Vol.59