Projection engineering (Jan-Dec 1931)

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On Land In Air • RACON Products Have Proven Their SUPERIORITY Throughout the world leading Sound equipment manufacturers have placed all types and makes of horns, speakers and units on exhaustive laboratory test. Engineers in nearly every case have chosen Racon Products as being the acoustically perfect, most adaptable Sound reproducers for Sound distribution. Whether or not you are satisfied with your present sound reproduction, Racon assures you there is still room for improvement. Let us study your problem. There is a Racon for every Purpose Top illustration shows Racon Horn No. 5325. an air column chamber approximating 10 ft. 30 inches deep, bell 34 x 44 inches, weight 55 lbs. with frame. Ideal for Theatres with small space between screen and wall. Lower illustration is the new 4 unit aeroplane trumpet. 54 inches long with 30 in. bell, weatherproof, demountable — the super Public address horn for long range and tremendous volume weighs 30 lbs. Racon's Electro Dynamic Horn Units are recognized as the finest that money can buy. Natural tone volume "with Racon. RACON HORNS AND UNITS ARE COVERED BY U. S. PATENTS NOS. 1,507,711 1,501,032 1,577,270 73,217 73,218 1,722,448 1,711,514 1,781,489 Write for Catalog RT7i . • r^Incaeon iilectric L^o* FACTORIES : 18 TO 24 WASHINGTON PLACE, NEW YORK TORONTO, CANADA LONDON, ENGLAND