The talking machine world (Jan-Dec 1910)

Record Details:

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THE TALKING MACHINE WORLD. 49 LATEST PATENTS RELATING TO TALKING MACHINES AND RECORDS (Special to The Talking Machine World.) Washington, D. C, May 10, 1910. Apparatus for Coating Sound Records with Electro-Conductive Material. Isaac W. Norcross, New York. Patent No. 952,753. This invention relates to the art of making sound-records and to the production of numerous duplicates from an original or master record. The invention is directed to that portion of the operation of making duplicate sound-records from an original, which consists in preparing the surface of the original record by coating it with an electro-conductive substance so that a matrix may be made thereon by electro-plating. Original sound-records are commonly formed of a waxy substance and in order to form a matrix on this original it is common to provide a coating of graphite upon the surface of the original record to make its surface conductive prior to putting the record in the electro-plating bath. Heretofore it has been the practice to apply graphite to the surface of a sound-record manually with a camel's-hair brush by wiping the brush against the record at one point and then another repeatedly to coat the record with the graphite and rub the latter into the grooves of the record as thoroughly as possible. The application of the graphite to the surface of the original record in this way has not been satisfactory, both because of the character of the results obtained and because of the amount of time required, and it is the object of the present invention to provide an improved process and apparatus whereby this step in the manufacture of sound-records may be performed in a much superior mannare and in much less time than is required under the method heretofore employed. This invention consists in loading the surface of an original sound-record with the electro-conductive material and then, in an operation distinct from the loading operation, burnishing the surface of the record. In this way a very much superior coating of the material is obtained, this coating having a bright, burnished surface similar to an enamel. Furthermore, the part i c 1 e s of the graphite are so closely laid upon the surface of the record that the coating is impervious to moisture; this is an advantage of considerable importance, for the record, after being coated, must be placed in the electro-plating bath, and if. the water of the bath finds its way through the graphite coating the record is quite apt to be spoiled by the water coming in contact with alkali in the sound-record and forming what is known as a "soft spot." Furthermore, the coating of graphite obtained in accordance with this invention is such that the coated record may be handled with little danger of affecting the coating thereon, whereas with records coated under the process heretofore commonly employed, great care had to be exercised to keep from touching the surface of the coated record. In these drawings. Figure 1 is a perspective view of the apparatus; Fig. 2 is an elevation of the same, with one member in vertical section; Fig. 3 is a sectional view of the mandrel, and eg,. A J Fig. 4 is a plan view of the machine with one of the parts shown in horizontal section. Attachment for Talking Machines. William S. McNamara, San Francisco, Cal. Patent No. 954,455. This invention relates to sound reproducting in machines of the disc type and has special reference to a mechanism adapted to be applied to such machines for the purpose of stopping the machine after the reproducing needle has covered a definite part of the record. in the accompanying drawings, like characters of reference indicate like parts in the several views, and Figure 1 is a top plan view of a portion of a disc sound reproducing machine equipped with the invention. Fig. 2 is a partial side elevation of such a machine. _ Fig. 3 shows the [J • collar or clip adapted for application t o the sound-box of a talking machine. Fig. 4 shows a view of a modi* tied form of brake end. Fig. 5 is a second modification of the brake end such as is used for machines employing discs or records larger than the revolv0 » ing plate. Fig. 6 is a modified form of the brake arm or standard. Fig. 7 is another modification thereof. Fig. S is a modification showing a lug cast on the sound-box of a talking machine for the attachment of the stop. Sou.\»-Box for Talking Machines. Robert L. Gibson, Philadelphia, Pa. Patent No. 954,953. The object of this invention is to provide a construction of sound-box for talking machines which shall have great sensitiveness, whereby the volume of sound may be increased without loss of timbre or accuracy of articulation. This invention consists in supporting the stylus bar on a pivotal connection formed by a spring whose length is in a plane at right angles to the plane of the diaphragm. I n providing the sound-box with a stylus bar secured to or in contact with the diaphragm and suspended from the frame of the sound-box by a wire structure under tension. In providing an expansible frame to which the wire structure is secured, combined with adjusting devices for the expansible frame whereby the wire structure may have its tension adjusted. Figure 1 is an elevation of a talking machine embodying the invention; Fig. 2 is a front elevation of the sound-box; Fig. 3 is a bottom view of the sound-box; Fig. 4 is an enlarged sectional view on line 4 — 4 of Fig. 2, showing the improved -J J manner of suspending the stylus bar; Fig. 5 is a bottom view of a sound-box showing a modification of the invention, and Fig. 6 is a sectional elevation of the same. Sound-Modifier for Talking Machines. Edward P. Shepard, San Diego. Cal. Patent No. 953, 557. This invention relates to an improvement in soundmodifi3is for talking machines, f.nd its object is to provide means whereby the sound can be modified or reduced without in anywise producing a detrimental muffling effect. In the accompanying drawings, Figure 1 is a fragmentary view of the goose-neck of a talking machine, showing the invention applied; Fig. 2 is a plan view of the modifier, and Fig. 3 is a sectional view of the same. Duplicate Sound-Record. Jones W. Aylsworth, East Orange, N. J., assignor to New Jersey Patent Co., West Orange, N. J. Patent No. 953,454. The purpose of the present application is to describe and claim an improved sound-record as a new article of manufacture. As such, the invention may be defined as a duplicate sound-record formed of celluloid (in which term is included all so-called indestructible materials for the instrumental purpose, such as collodion, pyroxylin and cellulose acetate, and having homogeneous or non-laminated walls and with a cast permanent record surface, as distinguished from one in which the material is merely distorted or displaced. Figure 1 is a longitudinal sectional view of the improved record. Fig. 2, a diagramatic view of a suitable apparatus for producing the same, and Fig. 3, a cross-sectional view through the matrix showing one way of removing the finished records therefrom. Diaphragm. Clark Zarr, Newberry, Pa. Patent No. 953,889. This invention relates to diaphragms for soundconveying instruments, and is particularly applicable to use in talking machines. The object of the invention is to provide a diaphragm which will transmit the human voice, music and other sounds without detracting from the tonal qualities or adding any unpleasant sounds. The diaphragm will be made of suitably prepared and treated fiber sheet material. If a center post is employed this may be made of similar material. The fibrous sheet material diaphragms and post may be assembled and fastened together by a coating of some resilient waterproof material. In practice the diaphragm may have applied to it a gasket of yieldable material to prevent the parts which will normally clamp the diaphragm in position interfering with the proper working of the diaphragm. Figure 1 is a perspective view showing one sids of the improved diaphragm, namely the lower or post-carrying side. Fig. 2 is a similar view of the other or upper side of the diaphragm. Fig. 3 is a broken-away, enlarged central cross-sectional Cry