US855736A - Sound-box for talking-machines. - Google Patents

Description

No.855,786. 4 PATENTEDV JUNELL, 1907.

L. P. VALIQUET.

SOUND BOX FOR TALKINGMAGHINES. APPLICATION FILED JAN. 12, 1904.

WITNESSES: INVENTOR loxi\s .\$cx\\guei By I m A TTOIINEY.

- T0 (12/: whom it may concernrinrrnn erases rarer enrich Louis? va iieunr, or NEW YORK, N. Y., ASSIGNOR TO THE VICTOR .TALKING ltiACHINE COMPANY, A CORPORATION or NEW roan.-

scene-sex Foe TaLKiNle-macHiNEs.

Be it known that I, Lou s P. VALi UieT, a citizen of the United States, and a resident of the city of New York, State of New York,

have invented certain new and useful Improvements in Sound-Boxes for Talking- Machines, of which the following is a full, clear, and complete disclosure. The object of my invention is to; provid such a construction in sound boxes that the stylus bar may be adjusted and formed so as to have the correct characteristics of-elas ticity, shape and size in relation to the dia phragni.

A further object of my invention is to provide such a stylus bar that the tendency to lateral movement of its end where it connects with the diaphragm is entirely obviated and the sound waves therebydischarge at in. more exactly perpendicular direction upon the diaphragm of the sound box.

' Briefly, .my invention consists in providing a stylus bar, the end of which is bent inwardly to form the connection between the end of the stylus bar and the diaphragm, the parts being integral and capable of being filedor reduced so as to vary theirsize, shape and elasticity.

For a full, clear-and exact description of my invention reference may be had to the accompanying specification and to the accompanying drawing forming part thereof,

in which I a Figure 1 s a Vertical sectional view of a sound box, said section being taken substantially on a plane passing through the axis of the stylus bar; .l ig. 2,'a front elevation of the sound box; Fig. 3, a side view'of the sound box on the side thereof through which the stylus bar projects, and Fig. 1, an elevation of the stylus bar detached from the sound box.

Referring to the drawing, the numeral 1 in- I dicates the cylindrical casing of the sound in position.

box, and 2 the sound tube thereof. The interior of the casing is formed with the usual flange or seat 3 for holding the diaphragm 4 The usual gaskets or other suitable matcrial are placed each side of the diaphragm as indicated at.5 and 6 A ring 7v referably of metal and slightly elastic is ibrced'against the outer gasket 6 to hold the diaphragm in position. openingS is provided in the cylindrical portion of the casing Specification of Letters Patent. Application filed January 12,1904. serial -188 806.

, Patented June 4:, 190% screws 10 for olding the fulcrum'and stylus bar in position.

The stylus bar 11 corisists'ol a tapering piece of steel or other suitable material having the usual recess 12 in its lower endfor 'eceiving the st lus or needle 13. The lower end of the sai stylus bar 11 is provided with an enlarged ortion in the nature of a flange against whic the sup orting spring yoke or fulcrum 15' is seated passes the thumb-screw 16 for retaining the needle 13 Within the end of the stylus .bar. The inner reduced end' of the stylus bar 11 is curved slightly outward and then inwardat right an es to the axis of said stylus bar as indicated at 17. The inner end of the rightangled portion is provided with enlarged head 18" which'is secured against the dia-. phragm 4 by means of wax or other suitable material, as indicated at 19. The curved portion 17 of thest lus bar-l1 is preferably of small radius an of the shape shown in Figs. 1 and 4, the shape shown being that most convenient for the adjustment and same in relation to diaphragms of difieren peculiarities and characteristics.

. 5 and through which It is well known in the manufacture of ,thicknesses which materially affects the quality and volume of the sound produced. A thick diaphragm would of course require a stylus bar of less elasticity, of more rigidity, and of heavier weight than would a die.-

phragm of a less thickness." It is therefore necessary to balance the stylus bar tocorrespend to the thickness of a particular diaphragm. This balancing may be easily accomplished in the present form of iny-invention by scraping or filing away the material about the curve and the portions adjacent ity and rigidity so that the said character: istics may be exactly and acchratelypro advantages of havingtheinner end offthe stylus bar reduced and purged as described? the stylus bar is made resilientioraportion .thereto, of the stylus bar. This not only reduces the weight of the stylus bar at them point of the curvebut also varies its elasticduced to correspond with the diaphragg which has been inserted. Inaddition 'to" the treatment of the stylus bar for balancing the 5 phragm. This does away with any tendency of its length which allows the vibrations transmission to the diaphragm. This causes the sound produced by the diaphragm to be much softened and the harsh-and undesirable vibrations are, therefore, eliminated.

The curve'17, in combination with the outward bend of the'stylus bar proper, aifords amuch longer connection between the stylus bar and the diaphragm, thereby obviating the tendency of the diaphragm to be moved transversely, owing to the fact that the end of the stylus bar vibratesor'oscillates in the arc of a circle. This longer connection also allows. the part at right angles to the diaphragm to be made stiffer without sacrificing any features of theresiliency thereof.

By having the fulcrum spring or yoke located as shown in the drawings, that is, substantially in the plan of the axis of the stylus bar and by, providing the inner end of the stylus bar. with the shape shown, the oscillations of the stylus bar are made at almost exactly right angles to the plane of the diaof the end of the stylus bar to move laterstylus bar from the diaphragm.

ally in the plane of the diaphragm, which in some instances with heavy vibrations is sufficient to loosenthe connecting portion of the Ido not wish to be limited to the exact details of form and arrangement of parts herein set forth for the same may be varied, to produce the functions and results set forth, ina degree commensurate with the claims hereinafter made.

Having thus described my invention, what I claim and desire to protect by Letters Patent of the United States, is

' 1. In a sound box for talking machines, the combination of adiaphragm and a stylus bar having a double 'or reversed curve and having its inner end broughtinto operative relation with said diaphragm.

' 2.'In a sound box for talking machines, the combination with a diaphragm, of a stylus bar gradually tapered toward its inner end, and having a double or reversed curve, said inner end being adapted to be connected to the diaphragm.

3. In a sound box for talking machines, a stylus bar which is graduallytapered toward its inner end, said end being curved outwardly on an arc of comparatively large radius and then curved inwardly on an arc of comparatively small radius to connect with the diaphragm on a line at substantially right angles to the plane thereof.

4. In a. sound box for talking machines, the combination of a diaphragm and a stylus bar which is reduced in diameter toward its inner end, said reduced portion being bent out of the direct line first away from and then toward the-point where it is connected with the diaphragm to increase its length in relation to thelength of the radius of the 7 sound box.

5. In a sound box for talking machines, a stylus bar having a reduced inner end, said end being curved outwardly, and then inwardly to be attached to said diaphragm and .to form a resilient or yielding connection therefor.

'6. In a sound box for talking machines, a

stylus bar having agradually reduced inner end which is adapted to be attached to the diaphragm, said end being curved outwardly, and then inwardly in a direction substantially at right angles to the axis of'the stylus bar to form a resilient connection.

7. In a sound box for talking machines, a stylus bar having a tapering inner end, said inner end being bent outwardly, and then inwardly in a curve of small radius to connect with the diaphragmto form a resilient connection therewith.

8. In a sound box for talking machines, a

stylus bar which is tapered toward its inner end, said end being bent outwardly and then curved inwardly to connect with the diahra m and to form a resilient connection P e therewith. I

9. In a sound box for talking machines, a stylus bar having an integral flange thereon, a fulcrum for said stylus bar comprising a torsion spring having a central collar held frictional y in position against the said flange. v

on the stylus bar, said spring having annular ends adapted to be attached to the sound box casing.

10. In a sound box for talking machines, a

stylus bar having an integral flange, afu-lcrum for said stylus bar comprising a torsion spring having portions substantially in the plane of the axis of said stylus bar having a then toward said diaphragm, the inner end of said stylus bar being adjacent said diaphragm. y

13. In a sound box for talking machines the combination of a diaphragm and a stylus bar, said stylus bar having its inner end inclined' outwardly away from the diaphra and then turned inwardly to be attache to said diaphragm, to form a resilient or yielding connection therefor.

14. Ina sound box, a stylus bar having its inner extremity bent outwardly on a curve of relatively large radius and bent inwardly In witness whereof I have hereunto set my on a C1:1[1'VB of relatively smalllradius; d hand this 8th day of January, A. D. 19041 15. n a soun box, a sty us a1" tapere toward its inner extremity, the said stylus LOUIS VALIQUET" 5 bar being bent outwardly on a curve of rela- Witnesses: tively large radius and being bent inwardly FRANK G. SWARTWOUT,

on a curve of relatively small radius. JOSEPH M. ZAREMBA;

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