Exhibitors Herald and Moving Picture World (Apr-Jun 1930)

Record Details:

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RC A Photophon To introduce the curved gate Insuring smooth reproduction, eliminating scratches, gear and sprocket tooth flutter and stoppage due to buckling of film. To adopt change-over switch For instantaneous changing fro one projector to another. To employ Caesium photo-electric cell Insuring long life and dependability, quiet in operation and requiring no photoelectric cell amplifier mounted on projector. To utilize dynamic cone loud speaker, with directional baffles. Establishing unsurpassed fidelity of sound reproduction and insuring effective sound distribution to all parts of the theatre. Also eliminating stage batteries for loud speaker field excitation. To offer motor generator operation for small theatres Eliminating all storage batteries and battery charging equipment. To abandon variable speed control Thereby decreasing cost, simplifying operation and insuring projection at proper speed. • To utilize standard Radiotron tubes A tube superior to all at a low cost. to make it possible for the small theatre owner to install the finest sound equipment at a price he can afford to pay