The Exhibitor (1957)

Real Protection against Pressure damage TOO! Unlike speakers with flexible cases, cars can roll over it and the interior speaker mechanism remains in perfect shape. Shock proofed as well! It’s safe be¬ cause the new Dub’l-Cone is not only rubber cushion mounted, but it also has special new bosses that keep the speaker unit in perfect alignment. SPELLS Speaker Protection New 1957 Ballantyne Dub’l-Cones are the toughest speakers ever built 1712 Jackson Street Omaha, Nebraska plastX plate screen coating gives 50% IMPROVED PICTURE BY ACTUAL TEST PLAST X PLATE Ordinary Coating • BRIGHTER PICTURE • SHARPER CONTRAST • BETTER COLOR • WATERPROOF • STAIN RESISTANT • SOAP AND WATER WASHABLE e ONE COAT ROLLER APPLICATION • PROVED DRIVE-IN USE With 5 YEAR GUARANTEE to remain at this extra white level without changes, if properly applied. If you have not yet received our literature Write Delaware Valley Agent PLAST X PLATE 'NC 344 N. Broad St., Phila. 2, Pa. BERWYN, PA. Rlttenhouse 6-4783 Transparent Magnetic Soundtrack Shown A demonstration of a transparent mag¬ netic soundtrack highlighted a session devoted to sound recording and repro¬ duction that closed the 81st Convention of the Society of Motion Picture and Television Engineers in Washington last month. The papers presented also indi¬ cated the further development of bilin¬ gual soundtracks. A paper by George Lewin, of Army Signal Corps, described his discovery of a method for reproducing an optical track even when combined optical and mag¬ netic tracks are required. Some of the applications of the discovery would be in the field of regular 35mm. theatre release prints, as well as multi-language prints in both 35mm. and 16mm. gauge, Lewin said. He stated that relatively minor modifications of most present day equipment would be necessary and that most military projection equipment re¬ quires no modification. “I unexpectedly and to my complete surprise, discovered that under certain conditions the magnetic strip has been transparent all the time,” Lewin said The transparent magnetic track is being used in Army applications and also its multi-lingual possibility has some sig¬ nificance for the world of entertainment. The wider implications of the Lewin dis¬ covery appeared to be so far reaching that one member of the audience said that a new era in communications may be at hand. Other speakers heard included R. J. Tunkham, Ampex Corporation; Carl Shipman and Carl Hittle, RCA Film Re¬ cording Section, Hollywood; J. S. Powers and George Krous, Bell and Howell Comoany, Chicago; Robert C. Lovick and Richard L. White, Eastman Kodak; M. Rett’nger of RCA Engineering Depart¬ ment, Hollywood; and W. H. Clarke and F. W. Rennie, RCA Great Britain, Ltd. New Floodlighting Units Two new series of weatherproof wiring troughs and splice boxes, of particular interest for drive-ins, recently were an¬ nounced by Stonco Electric Products Company. Designed, it is said, to increase floodlighting efficiency in outdoor appli¬ cations, as well as to cut down costs in initial equipment, installations, and main¬ tenance, both are made of tough alumi¬ num alloys. Covers are also precision cast aluminum and are made full length to expose the entire box or trough interior for quick, easy splicing. The trough holes are standard one-half inch NPS to fit any standard lampholder or fitting, and are slanted outward to provide additional free space for more lampholders on each trough so that floodlighting installations can be laid out with fewer clusters. The new troughs come in sizes from nine inches to 22 inches in length, to hold up to 12 lampholders individually, while the new splice boxes come in square, round, and hexagon shapes, all available with locking set screws at each hole to permanently fix floodlighting focus once set, Sonco says. All are fully ULapproved. Interchangeable accessories in¬ clude pole top slip fitters for various sizes of pipe, and wall brackets for mount¬ ing complete floodlighting assembly units. PE -10 PHYSICAL THEATRE • EXTRA PROFITS DEPARTMENT of MOTION PICTURE EXHIBITOR June 19, 1957