US1544589A - Sound tube for talking machines - Google Patents

Description

-Jlulyk'lfy 1,544,589

w. lvjoYl-:Ry SOUND TUBE FOR TALRINQ MACHINES- originan Filfed June 25,419.21'

UNITED srAT'ES'PArENT orifice,

WILIIAM- w.` MoYnR, for coLLmGswooD, NEW JERSEY, AssrGNon To VICTOR 'raini-v ING 'MACHINE GOMBANY, A'conr'oanrrolv or NEW JERSEY.

SO'UND TUBE FOB. TALKING MACHINES.

` `appiicauli ined June 23, 1921, serial No.-479,738.. Renewed November-17,1924.

Toall whom it may concern.'

Be it known that I, WILLIAM W.,MornR,

a citizen of the United States,:ad a resi` dent of Collingswood, inthe county of Oamden'and State of New Jersey, have invented certain new and useful Improvements in Sound, rlubes for Talking Machines, of

Which the' following is a specification'.

My invention relates to certain improvements in talking machines, and more; par,- ticularly to sound-tubes or sound conduits, comprising'the tone arm proper, the gooseneck or other tube to which thev sound box may be attached, and the connection between the tone arm and the gooseneck by `means of whicha continuous passage for sound waves 1s provided between the sound box and abny suitable amplifier with which the tone arm may be in communication, and the sound box is free to oscillate vertically in its travel Vacross the face of the record,

and the sound box may be swung upwardly away .from the'record. The objects of my 'invention are to provide 'a sound conduit or sound conveying tube in which there is a substantially continuous tapering passage Ifrom the sound i' box to the amplifier, with which the larger end of the tone armis in communication; in which there are few parts which are'readily, and easilyfassembled; inl which the goose-- neck is free to rotate 4smoothly in the end of the tone arm proper-without frictional resistance to such motion but without any looseness between the gooseneck and the tone arm; wherein any wear in the bearings between the gooseneck and the tone arm may be readily taken up; in which anyrattle'or vibration between the gooseneck and the tone Asent an. attractive appearance.

arm isabsolutely eliminated; and in whichl .the assembled tone arm and gooseneck prevthe end of the tone arm, the gooseneck, and

the connection therebetween, with the posi- 'tion of the sound boxindicated in dot and dash lines, p

In Fig.1 is shown -a portion lof a cabinet of 4a talking machine, whichportion may 'be the top of a cabinet, or a partition within- 'a cabinet.v To the under sidey ofl the motor board 2, .a1-motor,V- (notshown) may be securedin the usual manner, said motor being' 'l arranged. to rotate the vertical spindle 3, on f the upper 'end ofwhich the urntable 4 is mountedtosupport and'rotate a sound record The sound-box6 may be secured by the bayonet joint Z and pin 8, to the free end of the'gooseneck' 9, and it" is of course provided with theusual stylus 10 arranged totrack in the grooves in the face o-f the sound record.r i

"The larger end of lthe tone arm "11 has a bearing `in the. bracket 13 Aand a coaxial `bearing '14 inthe overhangig end 15 of the bracket 18and upon these bearings, 12 and I14, thetone'arm 11 is free to swingupon a verticalaxls ina plane parallel to the face ofthe sound record 5,@ It isto be understood that thel larger endl of the tone arm might be directed upwardly instead of downwardly to' communicate with anampliiier above the tone arm, a 'suitable bracket being obviously necessary for so mounting theA vtone arm. Y

vWhen the stylus lOvis in engagement with the groove in the 'record 5 vandthe record is rotated, the tone arm 11 and gooseneck 9 swing in ahorizontal plane about the axis of the lbearings'12 and .14 andthe reproduced sound is transmitted through the gooseneck 9 and tone 'arm 11 to -the amplifier.

The smaller free en'd- 16 of Athe tone arm 11 is'provided lwith a relatively short transverse cylindrical. sleeve 17, 'one end 18 of which is closed 'except for a small beveled hole 19 `therein at .the'center thereof, and the other end of which isopen, the said open end being provided with an inwardly vconverging narrow beveled or conical bearing surface 20. The sleeve 17 is permanently and rigidly secured to the small end 16 of the tone arm 11 Iin any substantial manner as for instance by brazing or soldering.

The gooseneck 9 is,vgenerallyv speaking,

to by a pin 8 onthe sound box sliding into a bayonet slot 7 in the end of the gooseneck 9. The ,larger end 22 of the gooseneck 9 is preferably cylindrical and may be closed by a plug 23y rigidlyvsecured thereto, as for instance, by brazing or soldering. Between the cylindrical end 22 and the tapered por'- tion of the gooseneck or sound box tube 9 is a shoulder 24 providing a narrow conical surface 25 adapted to it smoothly against the conical surface of the sleeve 17 The plug 23 is provided with a screw threaded opening 26 arranged coaxially with respect to the -cylindrical end 22 of the gooseneck andl adapted to receive a split screw 27, the head 28 of which is preferably conical and adapted to fit within the beveled opening 19 in the closed end 18 of the sleeve 17. The end 22 of the gooseneck 9, yand which is within the sleeve' 17, is of a diam-j eter substantially less than the kdiameter of the interior of the said sleeve, and the length of the said end 22 from the conical shoulder 24, to the end of the plug 23 is substantially less than the length of the sleeve 17 froml the conical bearing 20 thereon to the inner side of the end wall 18 of the sleeve.

To assemble the tone arm and the gooseneck it-is merely necessary to insert'the end 22 into the open end of the sleeve 17 `and to then thread the screw 27 through the opening 19in the closed end 18 of the sleeve 17,

into the threaded hole 26 in the plug 23 and neck up into smooth bearing relation with the conical surface 2O of the opeir end of the sleeve 17. In this manner the two parts may be drawn so nicely together that there isno lost motion whatever between them. 'If,..in the course of time, aslightk wear .should occur between the vconical surfaces 2O and 25 and between the conical head 28 of the screw 27 and the conical hole 19 in the sleeve, it would be merely necessary to slightly turn the screw 27 sufficiently to draw the parts again into perfect bearing relations with respect to each other.

In this constructionthe bearing surfaces which are in engagement with each other are very small. There is very little fric tional resistance to the free turning of 'the gooseneck within the sleeve 17, but at the sametime there is no looseness or lost motion between the said parts, therebyv obviat- 'compressed and will bind tightly in the opening and remain in fixed relation `or stationary with respect to the plug when once' adjusted.

In the assembled relation, the gooseneck or sound box tube turns or rotates within the sleeve on` smooth narrow bearings provided by the said conical surfaces 2O and 25, and on the small ivot provided by the screw or stud 27. gs shown in the drawings, the head 28 of the stud 27 is pref' erably conical and fits smoothly into the 'conical hole 19 in the closed end 18 of the sleeve 17, and therefore the gooseneck or sound box tube may`- be considered to be mounted on a pair of opposed narrow conical bearing surfaces on the tone arm, one` of the sleeve or tone arm which engage or are in contact at all with the gooseneck or `cooperating conical bearing surfaces on the sleeve or tone arm. When so viewed the sound box' tube is mounted to freely rotate within the tone arm on two opposed conical bearings adjustable axially with respect to each other to provide for an accurate ad- -justment of the bearings and for taking up of wear therebetween.

By allowing ample clearance between the inside surface of the end 18 of the sleeve 17 andthe surface of the adjacent end of the-plug 23 and by making the diameter of .the end of the gooseneck which is inserted -into the sleeve substantiallyless than the diameter of the interior of the sleeve, slight variations in the length or diameter of the inserted end 22 of the gooseneck will not 'interfere with the proper mounting of the gooseneck within the sleeve', and therefore no particular accuracy is required in any of the over-all dimensions ofthe inserted end 22 ofthe gooseneck or sound box tube.

the' parts mounted thereon or carried thereto draw the conical surface 2,5 on the gooseby Vfhile the larger end 22 of the gooseneck is shown and described as being preferably cylindrical it is to be understood that it may b'e of any other suitable shape,- so long as it is out of contact -with the inner surface of the sleeve, except at the narrow bearing surfaces above described, and is not of 4a shape to prevent the passage of vthe sound from the sound box to the tone-a rm proper.

Having thusl described my finvention, what I claim and desire to protect by Letters Patent of the United States is;

1. In a sound conveying tube -for talking machines, the combination of a tone arm, a sound box tube mounted to rotate within the end of said arm, said tone arm being provided vwith a conical bearing surface and said soundbox tube being provided with 'a cooperating surface adapted to bear against said conical surface of said tone arm, and` means for adjusting said surfaces with Arespect to each other and for taking up any looseness therebetween and vfor holding said surfaces in smooth bearing relation. l

2. In a sound conveying tube for talking machines the combination ofa tone arm and a sound box tube, theend of said sound box tube being mounted to rotate within the end of said arm on two pairs of narrow opposed conical bearings one bearing ,of one of said pairs of bearings being adjustable toward and `avi/ay from the other bearing of said pair of bearings.

3. In a sound conveying tube for talking machines the combination of a tone arm lprovided with an opposed pair of narrow conical bearing'surfaces, a sound box tube provided with a complementary pair of opposed narrow bearing surfaces, and means to draw and adj ustfthe saidopposedesurfaces ofisaidA sound box tube toward each other, and each respectively against and into smooth bearing relation with one of said conical surfaces on said tone arm,iand to securely hold said surfaces in such adjusted position.

4. In a sound conveying tube for talking machines the combination of a tone arm terminating in a sleeve and interiorly beveled at lone end to form a narrow conical bearing surface, a sound box tube having one end extending coaxially within said sleeve, said end being of a diameter substantially less than that of 'the 'interior of said' sleeve, said sound box tube being provided with a shoulder having a conical surface, and means, ar-y f ranged coaxially of said sleeve and said end of said sound, box tube, secured lto said end and turning therewith, to take up wear between and to hold the said conical surfaces on 'said sleeve and sound box tube in smooth bearing engagement and providing a pivot on which, and said conical surfaces, said sound box tube may rotate within said sleeve.

,5. In a' sound conveying tube for talking machines the combination of a tone arm to lsaid end of said sound box tube and turning therewith, to adjust said sound box tube longitudinally within said sleeve and to hold the said conical surfaces on said sleeve andt sound box tube in smooth bearing engagement andprovid-inga pivot on which, 'and' said conical surfaces, said soundbox tube may rotate within said sleeve.

6. In a sound conveying tube for talking machines, the combination of a tone arm, terminating in a cylindrical sleeve open at one endand substantially closed at the other, but provided'with a relatively small opening at the center of the closed end thereof, the open end of said sleeve being interiorly beveled to form -a narrow conical bearing surface, a sound box tube having one'end mounted within' said sleeve withA its innerl end spaced from the closed end of said sleeve and of a diameter substantially less than that ofthe interior fof said sleeve, and hav- 7. In a sound conveying tube for talking j machines, a tone arm terminating in a trans- -verse cylindrical end open at one end and 'substantially closed at the other end but provided with a 'relatively small opening at the centeriof the closed end thereof, the open 4end of said sleeve being interiorly beveled to forma narrow conical bearing surface, a gooseneck having one end extending coaxiallywithin said sleeve, said end of said gooseneck being of a diameter substantially less than that of the interior of said sleeve and of a length substantially less than that of said sleeve, said' gooseneck being provided with a shoulder having a conical surface, and means arranged coaxially of said sleeve and said end of said gooseneck, passing'v through said small opening in the end4 of said sleeve, tightly secured to said gooseneck, turning therewith, operative to hold cal surfaces, said gooseneck rotates Withinl said sleeve.

8. In a sound conveying tube for talking machines, the combination of a tone arm and a sound box tube mounted to rotate Within the end of said arm, said tone arm and saidsound box tube being each provided With a conical bearing surface 'adapted to' t one against the other, and means for adjusting' said sound box tube longitudinally With- 10 inthe end of said arm and for holding said conical surfaces in smooth bearing relation. lIn Witness whereof, I have hereunto set iny hand this 21st day o`June, 1921.

WlLLIAM W. MOYER.

Images