The talking machine world (Jan-June 1928)

56 The Talking Machine World, New York, January, 1928 New Principle in Acoustic Development Using Two Diaphragms Is Announced New Principle of Reproduction Claimed by Instrument Employing Two Separate Diaphragms and Two Separate Air Columns — Compactness of Machine Is One of Its Features A new patented principle in acoustic development has just made its appearance. The machine is based on a new and different principle of reproduction, it is claimed. First, two diaphragms are used, one being Acoustical experimenters who have sought to amplify the lower frequencies have been faced with the fact that an extremely long air column was an absolute necessity, and after giving it due consideration from the commercial angle of both cost and housing space, have decided that rather than amplify the fundamental frequency, to call it a day and let the harmonic of the desired frequency serve instead. In most cases it is rather a poor substitute for the fundamental. As an alternative, there has been tried a lower-pitched reproducer, which, while greatly assisting the horn in the lower range, has also (he drawback of lowering the entire tonal register, so that a violin reproduces as a cello, etc. The problem has been accomplished in this instrument as follows: Two separate air columns II CI FV'<k GRAPHITE PHONO J M J SPRING LUBRICANT Ilsley's Lubricant makes the Motor make good. Is prepared in the proper consistency, will not run out, dry up or become sticky or rancid. Remains in its original form indefinitely. Put up in 1, 5, 10, 25 and 50-pound cans for dealers. This lubricant is also put up in 4-ounce cans to retail at 25 cents each under the trade name of FITRFK A noiseless talking !U*iELajgl£* MACHINE LUBRICANT Write for special proposition to jobbers ILSLEY-DOUBLEDAY & CO.. 229-231 Front St.. New York Showing Horn Arrangement in Cabinet so constructed as to best reproduce the tenor or treble notes, the other of such a character as to be best adapted to reproduce the bass notes. Each of these diaphragms being connected with horns of different size and length suitable to amplify their respective frequencies. This gets entirely away from the principle of depending upon one diaphragm and one horn io correctly reproduce all notes. The machine operates without needle scratch. The volume compares favorably with the new electric high-powered pick-ups. The compactness of the machine is another of its features, as the reproducer, tone arms, turntable, motor and horns need not occupy a space of more than 17"xl7"xl6", thus making it possible for the machine to be installed in a very small cabinet. The machine is fully covered by patents which are owned by Paul O. Richmond, president of the R. L. Watkins Co., 250 Park avenue, New York, who is responsible for its development. Just how and in what way these machines will be put on the market has as yet been undetermined. graphs playing simultaneously, each emphasizing its own characteristic tone. While the bass is dominant, it does not overshadow the treble, so that the blend of tone which only occurs at the horn openings is rich in tone and depth, and with greatly augmented volume. The bass viol which has a range of about forty cycles to two hundred and fifty cycles is now apparent, together with bassoon, kettle drums, trombone, and yet the wind instruments as the oboe, flute, piccolo, which cover a range of two hundred and fifty to about forty-five hundred cycles, are not slighted in the least. Needle and diaphragm noise is practically eliminated, due to design of stylus mounting and the cushioning effect of the opposed diaphragms. In test with respect to record wear no difference could be noted over standard types of reproducers, the playing of the electrically recorded orchestral records using this system of reproduction are a revelation. Instruments whose identity heretofore were questionable, now positively identify themselves; organ selections, with the high reed pipes and down to the lowest note which it is now possible to record, are reproduced faithfully and w!th full resonance. Tone Arm Arrangement and Swivel Horn Connection are employed and two separate diaphragms, both actuated at different leverages by a common stylus bar, which carries the needle chuck. The diaphragms are so arranged that they are of high and low pitch. This is accomplished by the size, shape and air space between the outlet of the reproducer and the diaphragm, together with the air-column load. Connected to the reproducer are two tone arms which terminate into a universal joint of unique design by which continuity of the air passages is maintained to the respective horns. The low-pitch diaphragm connects to the long air column and the high pitch to the short column. Thus, the result is that of two phono Friedman Records Liszt's "Campanella" for Columbia Ignaz Friedman, Columbia exclusive artist, has recorded for Columbia's latest celebrity list a piano selection which, since its composition by Franz Liszt, has probably been more used as encore number by concert pianists than any other. Its various interpretations certainly arouse more interest than any other short piano solo. This is Liszt's celebrated "Campanella," a tone picture of the bells of the Campanile at Venice. Friedman's rendition of this difficult air has long been the delight of critics and public, and the new recording preserves amazingly his familiar bright delicacy of attack and rare singing legato. The popularity of this number should insure large sales of the record. STYLE 21 Genuine Mahogany only. Walnut STYLE 21-B Same with both top panels hinged t o accommodate Radio Panel. THE LINE OF PROFIT PHONOGRAPHS AND RADIO CABINETS Excel phonographs, radio cabinets and combination instruments have been designed to meet every exacting taste. They are produced in all popular finishes and styles, including Upright, Console and Wall Cabinets — a complete line. Our centrally located factory and excellent shipping facilities insure prompt deliveries and attractive trade prices STYLE 17 Genuine Mahog any or Walnut Phonograph only Our full line is displayed in Space 232, American Furniture Mart, Chicago, during the month of January. STYLE 1 Gum Mahogany, Golden or Fumed Oak. STYLE 48 Walnut Radio Console. Built-in loud speaker and battery compartment. Accepts 7" x 18" panel. The models illustrated show several products of the EXCEL line, mechanically and acoustically up-to-theminute in every detail. The EXCEL line is appealing to the customers' eye, ear and purse. Your request for a catalog and price list will be given prompt attention. Enterprising dealers will find the EXCEL line well worth investigating. Excel Phonograph Manufacturing Company 402-414 West Erie St., Chicago, Illinois STYLE 2 Gum Mahogany, Golden or Fumed Oak.