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

April 12, 1930 Exhibitors H erald World 73 THE EQUIPMENT INDEX A Complete Catalog of Articles of Theatre Equipment and Their Manufacturers and Dealers, Arranged Alphabetically by Product [Manufacturers and dealers listed in black type have supplied this department with special information concerning their product which may be obtained upon request.! Accessories for Music and Sound Reproducing Devices ACCESSORIES for music and sound ^ reproducing devices are many and varied. This comparatively new phase of the motion picture business has brought new demands upon the theatre. In the word “theatre” are included the exhibitor and the projectionist. These new phases of theatre operation must be studied, and included in the product necessary to operation of such equipment are : Pick-ups, motors, needle cups and covers, automatic stops, headsets, turntables, volume controls (rheostats), electric filters, amplifiers (power packs), radio tubes, loud speaker units, speakers (magnetic or electro-dynamic), horns (exponential), rotometers, stroboscopic discs, cabinets and cabinet hardware. A well balanced set is imperative and for such a set there are equipment requirements which cannot be overlooked. There has also been brought out a rectifying device for use with the exciter lamp on the projector. This device eliminates the use of batteries or rectifiers for supplying D. C. current to the filament of the lamp. It consists of a transformer, chokes and condensers, and uses Argon gas tubes for the rectifying unit. Allen-Bradley Company, 286 Greenfield Avenue. Milwaukee, Wis. Alien-Hough Carryola Company, 279 Walker Street, Milwaukee, Wis. AMPLION RADIO CORPORATION, 133-141 W. 21st Street, New York City. Bodine Electric Company, 2254 W. Ohio Street, Chicago, 111. Brigg6-Stratton Company, 1047 Louis Avenue, Milwaukee, Wis. Central Radio Laboratories, 16 Keefe Avenue, Milwaukee, Wis. Chicago Cinema Equipment Company, 1736-54 N. Springfield Avenue, Chicago, 111. Electrical Research Laboratories, 22nd and Paulina Streets, Chicago, 111. Empire Phono Parts Company, 10316 Madison Avenue. Cleveland. O. Fansteel Products Company, Inc., North Chicago, 111. Forest Electric Corporation, 272 New Street. Newark, N. J. Freed-Eisemann Radio Corporation, Junices and Liberty Avenue, Brooklyn, N. Y. The General Industries Company, Elyria, O. Gray & Danielson Mfg. Company, 250 First Street, San Francisco, Calif. Hobart Bros. Company, Troy, O. Jewell Electric Instrument Company, 1650 Walnut Street, Chicago, III. Kellogg Switchboard & Supply Company, 1024-70 W. Adams Street, Chicago, 111. The Lakeside Supply Company, 73 West Van Buren Street, Chicago, 111. MACY MANUFACTURING COMPANY, 1449-51 39th Street, Brooklyn, N. Y. Newcome-Hawley, Inc., St. Charles, 111. Oliver Manufacturing Company, Film Building, Cleveland, O. The Oro-Tone Company, 1000-1010 George Street, Chicago, 111. The Prime Mfg. Company, 653 Clinton Street, Milwaukee, Wis. Radio Industries of Canada, Ltd., 120 Fort Street, Winnipeg, Manitoba. SAF ELECTRICAL ENGINEERING COMPANY, 261 Franklin Street, Boston, Mass. SILVER-MARSHALL, INC., 6401 W. 65th Street, Chicago, 111. THE THEATRE SOUND EQUIPMENT COMPANY, Hope, Ark. Thordarson Elec. Mfg. Company, 500 W. Huron Street, Chicago, 111. United Air Cleaner Company, 9705 Cottage Grove Avenue, Chicago HI. VAN-ASHE RADO COMPANY, Tenth and Walnut Streets, St. Louis, Mo. Yaxley Mfg. Company, 9 S. Clinton Street, Chicago, 111. ▲ Accounting Systems ¥>OOKKEEPING systems taking into consideration specific requirements of the theatre have been developed to care for the operation of motion picture houses. These may be had either in loose leaf form or in solid book form covering an entire year’s operation. These systems are designed to cover fully receipts and disbursements, film used, tickets sold, etc., and enable the exhibitor to check with promptness and accuracy his daily, weekly business or the business for the year. Prices range from $1.50 to $3.50. Erker Brothers Optical Company, 608 Olive Street, St. Louis, Mo. Finch and McCullough, Aurora, III. THE NATIONAL THEATRE SUPPLY COMPANY, 624 S. Michigan Avenue, Chicago, 111. A Acoustical Products and Engineering l>ROPER acoustics is today a subject of outstanding importance in motion picture theatres. The introduction of sound films has necessitated the establishment of a more exact standard of acoustics than was necessary when motion picture theatres simply had the acoustical problem involved in orchestral and incidental music, because speech demands a more exact acoustical condition than music. In addition, the use of sound films made possible a range of volume never before possible, and made it necessary as well to reproduce carefully every shade and inflection of the human voice. New types of speakers, special sound screens, etc., add to the problem. An auditorium that is faulty in acoustical properties is incapable of being used with any degree of satisfaction for sound films. Due also to the limitations of the recording and reproducing apparatus it is essential that the acoustical properties of the theatre in which sound films are reproduced shall aid in the quality of the reproduction rather than introduce added distortion and confusion. The problem of acoustics in auditoriums has been reduced to a science, and proper acoustics may be built into new theatres or provided in existing theatres through a proper study of theatre design and the use of interior finishes which have the qualities that control sound. Extensive research within the past few years has produced types of interior finish which combine the desir able acoustical characteristics with excellent decorative possibilities. These materials have an architectural flexibility of standard at least approximating that of interior finishes. The problem of acoustics in theatres has resulted in special consideration of them by certain manufacturers who have established special departments, headed by experts, to cooperate with theatre owners and architects in the acoustical treatment of theatre buildings. Berliner Acoustic Corporation, Paramount Building. New York City. THE CELOTEX COMPANY, 919 N. Michigan Avenue, Chicago, 111. General Insulating & Manufacturing Company, Alexandria, Ind. Craftex Company. 37 Antwerp Street, Boston, Mass. Irving Hamlin, 2406 Jackson Avenue, Evanston, 111. The Housing Company, 40 Central Street, Boston, THE INSULITE COMPANY, 1212 Builders Exchange, Minneapolis, Minn. Halizite Corporation, 49 W. 45th Street, New York City. JOHNS-MANVILLE CORPORATION, 292 Madison Avenue, New York City. KING STUDIOS, INC., 309 S. Harwood, Dallas, Tex. Macoustic Engineering Company, Ninth and Euclid Avenues, Cleveland, O. NATIONAL RUG MILLS, INC., 1001 Clybourn Street, Milwaukee, Wis. Sonograph Company, 68 Reed Street, Milwaukee, Wie. Stevens Sound-Proofing Company, 520 N. Michigan Avenue Chicago, 111. UNION FIBRE SALES, INC., Winona, Minn. United States Gypsum Company, 300 W. Adams Street, Chicago, 111. Universal Gypsum & Lime Company, 111 W. Washington Street, Chicago, 111. WESTERN FELT WORKS, 4029-4133 Ogden Avenue, Chicago, 111. Weyerhaeuser Forest Products. Merchants National Bank Building, St. Paul, Minn. The Wood Conversion Company, 360 N. Michigan Avenue, Chicago, 111. ▲ Act Announcers ^HE prevalence of combination bills in both motion picture and vaudeville theatres gives added significance to the act announcer. Naturally, in new houses these should be installed during construction so that they will harmonize with the interior design. In remodeling, suitable designs may be obtained for the decorative scheme decided upon. Act announcers are either automatically or hand controlled, with the automatic ones controlled remotely or from the stage. The general principle of the act announcer may be successfully used in window display promotion for the announcing of current and forthcoming bills. Such mechanism must be automatically operated. BELSON MANUFACTURING COMPANY, 800 Sibley Street, Chicago, III. Davis Bulletin Company, Inc., Lock Street, Buffalo, N. Y. A Adapters, Mazda 'T'HE Mazda lamp adapter is a device x for converting a projector using the carbon arc to the use of Mazda projection lamps. It can be installed in any carbon arc housing by fastening it to