Motion Picture Herald (Jul-Aug 1936)

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6. FEATURING Multi-unit transformer for polyphase, full-wave rectification, delivering extremely smooth output. Line voltage taps to permit adjustments for any line voltage from 190 to 250 volts. Secondary taps to permit a wide range of adjustment in arc-voltage and current to meet individual needs. Copper Oxide Rectifier Unit assembly. A permanent rectifying device of proven reliability and safety, which will operate indefinitely without attention or replacement. Blower system (patented) for forced ventilation of Copper Oxide Unit. By means of this blower system, the units are maintained at approximately room temperature. This feature will be appreciated by the projectionist. Heavily constructed blower motor, equipped with oversize ball bearings, specially lubricated at the factory and capable of giving many years of service without further lubrication or attention. Relays to provide protection in event of line failure and also permit operating the unit by remote control, if desired. Substantial steel casing with attractive bakedenamel finish. Plain exterior, free from switches and controls. Nothing projecting which can be accidentally bumped or turned causing an interruption of service. Compact design, cool and quiet operation permit installation in booth with safety. Hundreds of General Electric Copper Oxide Rectifiers For Projection Service have been installed in theaters the country over. Improved projection, reduced current-costs and increased profits have resulted in every case. G-E Copper Oxide Rectifying Units are available in two standard sizes: 40-50 amperes for 6-7 mm trim; 50-65 amperes for 6.5-8 mm trim. Other ratings may be built to order. For operating a spotlight, two units can be connected in series. Improve projection in your theater to increase attendance and profits. At the same time, reduce current-costs. A G-E Copper Oxide Rectifying Unit saves from 5 to 10 cents per hour in cost of current. For more complete details, mail coupon today. Section A-777, Appliance and Merchandise Department, General Electric Company, Bridgeport, Connecticut. Please send me full details on the new G-E Copper Oxide Rectifier For Projection Service. NAME ADDRESS CITY GENERAL ยป ELECTRIC SPECIAL RECTIFIERS MERCHANDISE DEPARTMENT, GENERAL ELECTRIC COMPANY, RRIDGEPORT, CONNECTICUT July 25, 1936 3