International projectionist (Jan-Dec 1937)

FEB -S $fl January 1937 ©CI B 329076 INTERNATIONAL PROJECTIONIST o ^ R0JECTI0NIS1 With Which is Combined PROJECTION ENGINEERING Edited by James J. Finn Volume 12 JANUARY 1937 Number 1 Index and Monthly Chat 5 Types of Shutters and Their Effect Upon Projection .... 7 A. C. SCHROEDER Effect of Electric Shock Upon the Heart 11 L. P. Ferris Improve G. E. Copper-Oxide Units: Data on Use, Installation and Maintenance .... C. E. Hamann 12 U. of F. Projection Short Course a Great Success 15 Joseph A. Campbell Sound Pictures in 1937 16 C. C. Bunn & E. W. Hartley Requisites for the Projection of Lenticular Color Film 20 J. G. Capstaff, 0. E. Miller & L. S. Wilder Common and Uncommon Terms in Sound Picture Work . /. . 17 Aaron Nadell Sectional vs. National Legislative Effort as an Aid to Craft 23 W. G. Woods & James J. Finn How Pitch Changes With Loudness 24 A. R. SOFFEL Projection Room Fire Precautions 25 News of the Month 26 News Notes Technical Hints Miscellaneous Items Published Monthly by JAMES J. FINN PUBLISHING CORPORATION 580 FIFTH AVENUE, NEW YORK, N. Y. Circulation Manager, Ruth Entracht Subscription Representatives Australia: McGills, 183 Elizabeth St., Melbourne New Zealand: Te Aro Book Depot, Ltd., 64 Courtenay Place Wellington England and Dominions : Wm. Dawson & Sons, Ltd., Pilgrim St., London, E. C. 4. Yearly Subscription: United States and possessions, $2 (two years, $3) ; Canada and foreign countries, $2.50. Single copies, 25 cents. Changes of address should be submitted two weeks in advance of publication date to insure receipt of current issue. Entered as second-class matter February 8, 1932, at the Post Office at New York, N. Y. under the act of March 3, 1879. Contents copyrighted 1937 by James J. Finn Publishing Corp. International Projectionist is not responsible for personal opinions appearing in signed articles in its columns. MONTHLY CHAT THE response to our editorial, "Specific Data in all Sound Contracts," which appeared last month, has been most encouraging and is indicative of the growing tendency of projectioniststo take a personal interest in the wel j fare of the theatre plant as a whole.After all, the boss knows little or nothing about the technical niceties of visual or sound projection equipment, which fact makes it possible for the projectionist to extend a lift and gain prestige. I. P. welcomes such inquiries. PROJECTIONISTS, whether organization members or not, should personally see to it that their employers ere observing the provisions of the Social Security Act, payments under which are due now for the month of January. Check this. OUR desk at the moment are "three bulky manuscripts which re OI veal how several workers have "solved" the problem of three-dimensional motion pictures. One of these also throws; in a color process, "costing no more than black-and-white prints," for good measure. None of them, incidentally, rates more than casual notice — but all of them insist that stereoscopic pic-, tures are necessary to "save" the industry. We should like to know why. SERIOUS efforts to supplant perforated sound screens with solid sheets are being made. One such screen has been approved by the major sound companies under "certain circumstances" relating to auditorium charac-. teristics. Most good perforated screens occasion a light loss of about 10% — a figure not impressive enough to warrant replacement by a solid sheet unless ideal house conditions prevail. I. P. will advise on contemplated installations. FLORIDA projectionists have been going to school — and liking it. So much so that arrangements now are being made for a second group session twice the length of the first. Complete details of this plan, applicable to every state, are given within. OUR recent article on projection room fires uncovered widespread interest anent "specific details" of particular fires. Unfortunately, such data were not available; but if it had been, it would have covered no more nor no less than the usual triangle: carelessness, defective equipment, or a miserable print. Other "causes" are merely variations upon these three main themes. INQUIRIES relative to the magnification ratio of various Suprex lamps are in progress by a sub-committee of the S.M.P.E. Proiection Practice Committee. Since all the lamp manufacturers have been asked to cooperate in these tests, the results should be conclusive and settle this matter.