International projectionist (Jan 1963-June 1965)

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Another Wide-Screen Process Now It's "Dimension 750" Todd-AO and Dimension 150 have combined forces to furnish motion picture producers with all of the finest features of wide screen motion picture processes according to an announcement from George P. Skouras, president of the Todd-AO Corp. and Dr. R. Vetter and Professor Carl Williams, developers of the new Dimension 150 process. Dimension 150 was developed by Dr. Vetter and Professor Williams, members of the faculty of the University of California at Los Angeles as a process that requires the use of only one camera and can be projected with a single projector on all screens, including the most deeply curved screen, without distortion. The Dimension 150 system includes the use of numerous wide angle lens up to a 150-degree bugeye lens which will give producers the widest camera range ever developed in the history of motion picturemaking. In addition, pictures produced in Todd-AO or Dimension 150 will offer to producers and exhibitors the facility and flexibility of presentation without incurring conversion costs in theatres currently equipped for 70 mm. projection on deeply curved screens used in several existing processes. Dr. Vetter and Professor Williams, who specialize in audio-visual education at UCLA, have concluded the development of Dimension 150 and have patents pending on the process. Arrangements are being made to present the process and demonstrate its possibilities, flexibility and economics to members of the motion picture industry within the near future. Negotiations have been concluded with Louis de Rochemont for the production of three films in Dimension 150, one of which will be "All The World's A Stage," a large-scale spectacle-drama based on the real life of a famous Broadway-Hollywood personality. iP New Strong Rectifier Operates 2 Arc Lamps From Single Supply One of the first installations of the new Strong Bi-Powr silicon stack rectifier is that of the Astro Theatre. Omaha, Nebr., shown with Richard Smith operating. This new type recti fier was developed for the operation of two projection arc lamps off oi a single power supply. It employs two silicon stack assemblies, one for each output. The life expectancy of the equipment is greatly lengthened due to the fact that there is "no aging." Hence there can be no unbalance in the units and no flicker on the screen caused by unbalance in power supply. The Bi-Powr is designed for operation on 220V 50/60 cycle three phase AC and is available in four ratings: /6i vttL T>) INTERNATIONAL PROJECTIONIST 1 Post Office Box 6174 VWW^MK Jf Minneapolis 24, Minnesota Enter my □ 1 year (12) issues — $3.00 subscription for □ 2 years (24) issues — $5.00 FOREIGN: Add $1.00 per year Nan ie Add ress City Zone State 60-85/ 60-85 ampere/ 35-45 volts: 75-105/ 75-105 ampere/ 48-61 volts; 90-135/ 90-135 ampere/ 56-70 volts; and 120-160 120-160 ampere/ 58-75 volts. A novel "Lo-Strike" feature associated with each output on the 90-135 and 120-160 ampere models protects the silicon stacks from overload and prevents the destruction of the carbon crater upon striking the arc. An exclusive automatic reset permits immediate restriking in the event that the arc is not established on first strike. Literature may be obtained by addressing the Strong Electric Corp., 31 City Park Ave., Toledo 1, Ohio. iP Christie Electric Features New Xenon Power Supplies Christie Electric Corp. is featuring a new line of xenon arc lamp power supplies, said to be ideally suited for such applications as solar simulators, data display systems, flight simulators and star tracking systems. These extremely versatile units may be used equally well with xenon or mercury xenon lamps (inset) and feature automatic current regulation and 18 extremely low current ripple. Each unit is designed to work with two or more lamp sizes. Output characteristic may be adjusted for operation of all lamps. Further information may be obtained by writing Christie Electric Corp.. 3410 W. 67th St., Los Angeles 43, | Calif. iP International Projectionist July, 1963