The talking machine world (July-Dec 1918)

104 THE TALKING MACHINE WORLD July 15, 1918 LATEST PATENTS RELATING TO TALKING MACHINES AND RECORDS— (Continued from page 103) Figure 1 is a vertical section through the upper portion of a talking machine cabinet, with certain of the interior parts appearing in section and others in elevation; Fig. 2 is a top plan view with the lid removed; Fig. 3 is a detail view on an enlarged scale in vertical section through the joint between the upper and lower sections of the sound conveyer; Fig. 4 is a horizontal section on the offset line 4 — 4 of Fig. 3; Fig. S is a fragmentary vertical section similar to Fig. 3, but illustrating the locked position of the two sections of the sound conveyer; Figs. 6 and 7 are detail views in the nature of diagrams designed to illustrate the different relations of the needle and record groove of a laterally cut record where the point of the needle moves in a radial line and where it moves in the arc of a circle over the face of the record; Figs. 8 and 9 are views similar to Figs. 6 and 7 respectively and illustrate the relations of the needle and groove of a vertically cut record where the needle moves radially and where it moves in the arc of a circle over the face of the record. Talking Machine Sound Box and Reproducer. — Patrick B. Delany, South Orange, N. J. Patent No. 1,261,218. This invention contemplates certain improvements in talking machine sound boxes and reproducers. As illustrated in the accompanying drawing, Figure 1 is a face view of the sound box complete. Fig. 2 is a perspective of the vibrating arm detached. Fig. 3 is a section on line 3 — 3, Fig. 1. Fig. 4 differs slightly from the illustration of Fig. 3 in that it shows the threaded engagement between the cruciform vibrating arm <@ig.-2. and its supports having right and left threads. Fig. 5 is a section on line 5 — 5, Fig. 1. Fig. 6 shows one of the gaskets between which the diaphragm is mounted. Fig. 7 is a cross section of Fig. 6. Phonograph. — Carl Stein, Steger, 111., assignor to Steger & Sons Piano Mfg. Co., same place. Patent No. 1,261,174. The purpose of this invention is to provide an improved construction in a phonograph or sound reproducing instrument, particularly with respect to the amplifying and resonating devices. It consists in the elements and features of construction shown and described, as indicated in the claims. Figure 1 is a vertical section, axial with respect to the vertically extending member of the sound conduit, of a phonograph embodying the features of this invention, the reproducer and tone arm and the record carrier being shown in side elevation and conventionally — that is, without regard to details of construction. Fig. 2 is a vertical section at the line, 2 — 2, on Fig. 1. Fig. 3 is a section at the line, 3 — 3, on Fig. 1. Fig. 4 is a perspective view of a removable resonating device adapted to be contained in the horn mouth or amplifier. Fig. 5 is a perspective view of an obstructive deflecting device, adapted to be positioned at the smaller end of the amplifier or horn mouth terminal of the conduit. Fig. 6 is a perspective view of a partitioning device employed in the sound conduit at the entrance to the amplifier or resonator. Split Mandrel. — Louis G. Larsen, Bridgeport, Conn., assignor to the American Graphophone Co., same place. Patent No. 1,265,793. This invention relates to talking machines, and more particularly to a support for the sound, record tablets thereof. It is customary with machines employing the so-called cylindrical type of record tablet to provide a mandrel having a slightly tapered exterior surface, the bore of the tablet being correspondingly tapered to fit the mandrel with such a grip that it may be rotated thereby. In the course of manufacture slight variations occur in the dimensions of the surface of the mandrel and of the bore of the tablet, with the result that different tablets do not fit different mandrels with the same degree of accuracy, both as respects their relative taper and as respects their mean dimensions. Furthermore, as the mandrel is usually made of metal, its co-efficient of expansion and contraction is different from that of the material of which the tablet is composed. Accordingly, changes of temperature effect different degrees of expansion and contraction of the tablet and mandrel. It is of importance, particularly with machines that employ correction devices, that the tablet shall always be placed in a predetermined position with relation to the mandrel and its related mechanism. Owing to the variations arising in the course of manufacture, as above indicated, and owing to different temperature conditions, a tablet frequently cannot be properly positioned upon a mandrel without danger of breaking it. It is an object of this invention to provide a mandrel whereby the tablet may be properly gripped for rotation, and whereby it may always be properly positioned, without danger of breakage from temperature changes or from undue pressure in attempting to force the tablet to its proper position. A further object of this invention is to provide a mandrel which shall resiliently grip the tablet only adjacent its ends, permitting ready application of the tablet upon and withdrawal of the same from the mandrel. A still further object is to provide a mandrel simple in construction, durable and easy of manufacture. This invention comprises a mandrel provided with a rigid central portion and relatively and independently collapsible resilient end portions. While the resiliency of the end portions may be provided in a variety of ways, the embodiments of the invention selected for illustration comprise the provision of a plurality of tongues running' longitudinally of the mandrel and conveniently produced by a series of saw-kerfs extending from each end of the mandrel. To provide for resiliently gripping the tablet only at its ends, the central portion of the mandrel is reduced in exterior diameter. Referring to the accompanying drawings, Figure 1 is a perspective view of a mandrel embodying the invention. Fig. 2 is a longitudinal central sectional view of the same, showing a record tablet in position; Fig. 3 is a fragment of a mandrel illustrating a modified embodiment. Cover Support for Phonographs. — Martin Bersted, Chicago, 111., assignor to the Brunswick Balke-Collender Co., same place. Patent No. 1,265,874. This invention relates to a cover support for phonographs and has for its object the provision of means for securely holding the cover in closed or opened position as desired, the cover being readily adjustable by simply grasping and moving it without the necessity of manually disengaging latches or other parts intended to hold the cover in place. Figure 1 is a side elevation of the device applied to a phonograph, a fragment of the latter being illustrated in section, with the parts in closed position, and Fig. 2 is a similar view showing the parts in opened position. Attachment for Phonographs. — George W. Van Nortwick, Denver, Colo. Patent No. 1,266,181. This invention relates to attachments for phonographs and its primary object resides in providing a simple appliance by which the needlecarrying element of the instrument is automatically retained in a raised position after it has been lifted to disengage the needle from the record. By the use of this invention, accidental dropping of the needle or stylus onto the grooved zone of the record is positively avoided, and the arm bearing the_needle may be moved across said zone for the purpose of returning the needle to its original position after it has traversed the zone producing groove, without danger of its coming in contact with the grooved portion of the record and without scratching or otherwise marring the same. Figure 1 is a fragmentary elevation of a phonograph to which attachment is applied. Fig. 2, a section taken along the line 2 — 2, Fig. 1. Fig. 3, a horizontal section along the line 3 — -3, Fig. 1. Figs. 4, 5 and 6 sectional views showing modifications of the arm of the appliance shown in Fig. 1. Fig. 7, a fragmentary plan view of a phonograph showing the invention as applied to a tone arm on which the sound box and needle are carried through the instrumentality of a pivoted goose-neck, and Fig. 8, a section taken along the line 8 — 8, Fig. 7. REPAIRS All Makes of Talking Machines Repaired Promptly and Efficiently TALKING MACHINE REPAIR AND SALES CORPORATION ANDREW H. DODIN, President 176 Sixth Avenue New York TELEPHONE, CHELSEA 8437