Projection engineering (Jan 1932-Mar 1933)

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for every type of sound installation RACON HORNS AND UNITS ARE COVERED BY U. S. PATENTS NOS. 1,507.711 1,501,032 ,577.270 73,217 73,218 1,722.448 1.711,514 1,781,489 1,832,608 1,834,327 1,835,739 horn speakers and dynamic units are better!! RACON Horns are constructed of an exclusive patented *non-vibratory material that positively eliminates resonance, so common in other type horns. RACON Horns are superior in reproducing high frequencies, especially at high volume. Distortion is impossible, tone quality approaching that of the human voice is assured. RACON "all-weather" Horns are unconditionally guaranteed against climatic conditions, rain, heat, snow, aridity, — nothing can affect RACON Horns. RACON ELECTRIC CO., Inc. 18 Washington PL, N. Y. C. London, England Toronto, Canada Write for Racon's Catalogue P. E. 1 and price list they will be sent upon request. "i i i i'i'i ' 1 1 II 1 1 Hi II 1 1 illiilltfil li'i illMIII II lilllHWIIIIIIIIIIII III' ill Hi