International projectionist (Jan-Dec 1946)

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INTERNATIONAL PROJECTION! With Which Is Combined Projection Engineering HENRY B. SELLWOOD, Editor Volume 21 DECEMBER 1946 Number 12 Index and Monthly Chat 3 Video and Movies: Natural Partners 5 Allen B. Du Mont Bubbles in Lenses 9 Dr. K. Pestrecov The New Motiograph AA Projector 12 EMIL J. WlENKE A 6-Phase, FullWave Projection Rectifier 16 Merle H. Chamberlin Incandescent Lamps for Film Projection, II 19 J. J. A. Manders In The Spotlight 22 Harry Sherman Telecasts 25 New Novel Service Kits Now Supplied to all RCA Field Servicemen 26 New National Experimental 9mm Suprex Carbon Burns at 90 Amps., 50 Volts 27 I. A. Elections 30 TESMA-TESDA Trade Show Huge Success 32 The Wenzel Bull Dog 38 Fred Wenzel Published Monthly by INTERNATIONAL PROJECTIONIST PUBLISHING CO., INC. 19 West 44 Street, New York 18, N. Y. R. A. ENTRACHT, Publisher 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.. Macklin St.. London, W. C. 'J Yearly Subscription: United States and possessions, $2.50 (two years, $4) ; Canada and foreign countries, $3; single copies, 30 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, 1931, at the Post Office at New York, N. Y., under the act of March 3, 1879. Entire contents copyrighted 1946 by International Projectionist Publishing Co., Inc. International Projectionist is not responsible for personal opinions appearing in signed articles in its columns. 420 MONTHLY CHAT THE turn of the year is a good tinnto count the blessings that have accrued to the projectionist craft within the past twelve months. The picture overall is one of widespread gains oi much social significance — and we do not invite concentration upon wage increases alone. The latter are, of course, socially significant, involving the mean for a fuller life and increased security. But it is fundamental in labor relations that any wage scale is in itself meaningless unless it be tied-in with ivorking conditions. Now, it is precisely on the score of working conditions that the craft has registered its greatest advance: In Illinois projectionists' classification has been changed by the State Labor Department from ""laborer" to. wondrous to behold, "skilled theatre operator." Vacations-with-pay are rapidly becoming commonplace in all work contracts. Insistence upon adequate sanitary facilities either in or very close to projection rooms has been spurred by hard-driving craft leaders who smartly enlisted the aid of civic authorities and public opinion to gain this end. Adequate room ventilation is now the focus of a concerted craft drive; and by '"adequate" is not meant a tarpapercovered slit knocked through the side of a wall, but the circulation of outside air without creating drafts. Indeed, all smart architects now hook-in the projection room with the theatre's air-conditioning equipment. The entrance to and egress from projection rooms via a lone, rickety ladder still is with us, sad to relate, but craft complacency on this score (unbelievably stupid though it be) is compensated for by the increased vigilance of the fire authorities who stand aghast at recent life-consuming holocausts. More new and safer-operating equipment by twice over has been poured into the projection rooms during the past vear than in any comparable period. This is a tribute to enterprising manufacturers who have energetically merchandised their wares to a point where they are fast breaking down exhibitor ignorance and indolence, as well as to the constant pushing of supply dealers. The craft has extended its domain far beyond the confines of the theatre and studio, until today its members are found working on ships at sea, in amusement parks, at racetracks, on trains — in short, wherever intelligent management recognizes the value of professional projection work. Yes, indeed, we have far more to be thankful for than the blessings conferred by increased wa?e scales. We reluctantly admit that all too many of these advantages have come to us through the efforts of all too few. Attractive as is this picture of our progress during 1946, let's all get in there and pitch to the end that the canvas will be appreciably brighter a year hence. INTERNATIONAL PROJECTIONIST • December 1946