The motion picture projectionist (Nov 1931-Jan 1933)

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10 Motion Picture Projectionist December, 1931 THEY KEEP ARUNNING ROTH ACTODECTORS ROTH ACTODECTOR CONTROL PANEL 20/40 to 100/200 Ampere 2Bearing Actodector CONTINUOUS OPERATION Based on a complete knowledge of the particular requirements in projection booths, Roth Multiple Arc Type Actodectors are accurately built and liberally proportioned to insure continuous oper^ ation . . .They are especially suited to sound equips ment installations . . . They supply steady direct current power to the arcs, which results in brilliant screen illumination of uniform intensity— even during change-over . . . Size range — 20 to 600 amperes... Furnished in 2 and 4'bearing types, dynamically balanced. Century-Roth Inverted Rotary Converters deliver alternating current, from any direct current source, for operating Gaseous Tube Signs, Public Address Systems, etc. ROTH BROTHERS AND CO. Division of Century Electric Company 1400 W. Adams St. Chicago, III. DIRECT CURRENT MOTORS AND GEN ERATO RS