US1302433A - Phonograph. - Google Patents

Description

C. B. REPP.

PHoNoGRAPH.

` APPLICATION FILED .UNEQ gll. l@ SQBS., Patented Apr. 29, 15H9.

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B. miPP.

PHONOGHAPH. APPLICATION HLED JUNE 2.1911.

Patented Apr. 29, 19?*9.

2 SHEETS-SHEET 2.

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CLINTON IB. i?, OF NEVI YORK, N. Y., .SSIG-NOR, BY MESN'E ASSIGNMENTS, TO

GUILLERM H. ALONSO, 0F NEW YORK, N. Y.

PHONOGRAPH.

teenies..

To all z czognv it 'may concern Be it known that I, CLINTON B. RRPP, a citizen of the borough of Manhattan, in the city, count-y,l

and i-'State of New York, have invented certain new and vuseful Improvements in Phonosound waves are transmitted through a vibrator member to av diaphragm placed under tension through said vibratory member, wherein the direction otV the application of stress or pressure upon the diaphragm may 'be varied to adapt the machine to use with records wherein the indicated sound waves have la vertical undulation, or records where- `in' such indicated sound waves have a lateral undulation. A further object is to provide in a machine of this character means applying pressure upon the stylus point 'through an auxiliary7 4supporting or controlling arm, the connecting means between this arm and the -vibratory member being so constructed as to permit that-,change iii the poa machine of this character wherein any variance in the arcs-'described by the' vibrator `member and by the auxiliary supporting lor cont-rolling arm will be automatically compensated for. in a manner to avoid anyv false tone in the reproduced sounds. A. still further object is to provide a machine of this character wherein the pressure will be placed.

uponA the diaphragm by means of a spring land a loop member capable of movement relative to the diaphragm, the means tensioning the saidl spring being capableo't such adjustment as to vary the direction ot the application ofpressure vwithout` materially varying the degree of such pressure. "still further object is to provide a machine of this -character wherein the `auxiliary c oiitrolling specification of Lenersratent.

nited States .,residing at the Patented am. as, ieia.

Application filed .T une 2, 1911. Serial No. 630,882.

or suporting arm will be so supported and will have the requisite pressure so applied thereto through the spring, as to avoid the development of independent vibrations in said spring or any retardation of said arm in following the indicated sound waves upon a record under the control of the vibrator member; A still further object is to provide in a machine of this character a concealed 'horn so constructed and arranged relative to the sound box as to permit said hornto have vertical movement relative to the sound box without disconnecting thev horn from the sound outlet of said box. A still further object is to provide in a machine of this character a concealed horn so related to the outlet of the sound boX as to permit the concealed horn to be disconnected from said outletl and the substitution of an ordinary horn therefor. And a still further object is to provide a. machine of this character, the

various part-s of which will be so constructed and arranged as to minimize likelihood of the development of such vibrations as would interfere'witli or impair t-lie sound vibrations indicated upon the record passing tothe diaphragm while permitting the machine to be economically produced.

The invention consists primarily in the combination in a phonograpln of an amplifier, a vibrator member` means capable ot.

movement relative to said amplifier, connecting said vibrator member with said ampliter, means applying pressure to said 'amplifier iiil a direction opposite Ato the direction of the vibrations passing thereto` and means varying the direction of the application of pressure by said last named means whereby both kvertical and lateral vibrations may be transmitted through said vibrator member to said amplifier; and in such other novel features of construction and combination oi?vv parts as are hereinafter set forth' and de? scribed and more particularly'pointcd out in the claims hereto appended.

Referring to tlie'drawi1igs:-'

Figure l is a front View in. perspective, ot the soundreproducing means ci' my. iinproved phonograph; F ig. 2 is a rear elevation thereof;4

F ig. 3' is a' detail view of theniount of the vibrator member;

Fig. 4: is a vertical sec-tion through" the ieu cabinet; showing the sound reproducing platform Z). The means actuating said plat? -form are not shown, as such are well known in. the art and immaterial to `the invention.

.Spaced away from and at one side of the platform Z) is a sound box c of the ordinary, or any.desired or approved type, having a sound outlet c and carrying a diaphragm c2 indicated in dotted lines Fig. 1. Said sound box is raised above the plane of the platform Z) by a plurality of standards (Z.

Extending from the diaphragm 02 toward the platform b is a vibrator member e, of material adapted to transmit sound vibrations to said diaphragm, as indicated by a record, such material preferably being wood.

One end of the vibrator member e carries a mount f for the stylus or reproducer point f3, and the other end thereof. carries an open loop e passing through and engaging a loop g carried by the stud 03 which extends through and is attached to, the diaphragm et The loop while preferably consisting of a strand of silk or cat gut, may be made of any desired material, so long as it pos-- sesses sufficient flexibility of 'movement to be capable of movement relative to the diaphragm and of placing the diaphragm under pressure acting in a direction toward the vibrator member e.

Acting upon the vibrator member e, and through -said member and the loop g upon the diaphragm, is a spring or other tensioning means h, the free end of which is attached to tensioning means mounted upon lone of the standards d.

In machines of this character, it has -been demonstrated that to` effectively transmit sound vibrations indicated upon a record through the vibrator member to the diaphragm, it is essential that the entire transmission mechanism should be in tension and that the means applying the tension to the connecting means between the dvibrator arm and the diaphragm must be applied in a direction opposite to the movement of the vibrations in passing to the diaphragm, with a resultant tensioning of the diaphragm.

Machines heretofore designed byfme embodying this principle, have been adapted for use only in connection with records having vertical undulatory lines thereon, -ori Igr'ap'iiophone records, and were not` capable lof use with records having lateral undulachine sliown in the accompanying drawings.

however, I apply the pressure of the spring it at an: angle to the axis of the diaphragm c2 sol as to adapt the machine for use in connection with gramophone records, 'thus bringing the line of the force exerted into consonance with the lateral vibrations passing through the member e.

In order that the machine u adapted for reproducing sounds from .graphophone records, the tensioning means for the spring. 7L consists'of a pivoted lever z', the arm of said lever to which the spring is connected, being of a length sufficient to bring the end of the spring below the point of connection between the loop g and the diaphragm, or in alinement with the axis of said diaphragm.

To secure the proper adjustment of the lever z', I provide said lever with a guide slot z" having enlargements 2 at the opposite ends thereof, a setl sciew connected to the standard (Z supporting said lever, passing through said slot and having an enlarged head adapted to enter said enlargements and prevent the accidental displacement of said lever through the tension of said spring and the loosening of said set screw. It will be readily observed that by this construction, the raising or lowerino of the arm of the -lever 2' to which the spring h is attached, will vary the directionofthe pressure applied to the loop g and through it to the diaphragm c2, the pressure so applied being either axially of said diaphragm or at an angle to, and laterally of said axis.

Axially below the diaphragm c2 is a post 7e having a horizontal slot 7c therein, said post having revolubly mounted therein a fork Z having a screw threaded stem Z cooperating with screw threads in said post and of a length sufficient. to extend-across said slot ZE.

Mounted in the fork Z -by means of horizontal pivots Z2 is a forwardly projected supporting or `controlling arm m through which the requisite pressure of the stylus upon the record is developed. The forward end of the arm m is connected to the vibrator member e adjacent the mount f, insulation being used between the member c and the connecting means to prevent the development of Vibrations in the arm m. The revoluble stem Z and the pivots Z2 having. axes perpendicular to each other, the arm m is free to rock vertically or swing laterally with the movement of the vibrator member e in follow-ing the record, said arm m at all times determining and maintaining the proper position of said vibrator meniber relative to the record.

Pendant from the arm m is a post n having a series of recesses along the length thereof adjacent sai'd arm, the lower portion meer; ,f

' of said arm extending atan angle toward the post k terminating adjacent to said post in a; manner to support the arm 1ny and the vibrator member e when the stylus point. is

j -oisengagednfronithe record. Connected with the plz'istjzrv at one end withthe steml at the i, other end, is' aispring opfwhichl by reason of Pits acting-'upon'. the E'post below the arm m eiterts sufficienti-,downward .pressure upon lv`-x1-said arm tos'e'cure 'the'desired pressure oft-he, stylusupoirithfe'recard.I Byshifting the con- Y `necting'.'po'in't between said .spring and said POSt n' upwardly" o rfdowli'wardly, this pressure maybe lessenedV or'v increased as desired,

the notches-.along saidpost holding 4the -spring any: ladjusted position.

Owlng tofthat-'shifting of the. membere incidental to converting 'the instrument from af'i-gramophoneyto en -'graphophone, or vice 0i A.

" -"jifrbetiveen the vibrator member e and 1ts suplversa-5. Iim'mirporate.in the-connecting means andco'iiti'blling 'arm m 'a universal joint soastojpfermit the requisite. .shifting Qrof'fthefvibrator .member e relative to the supporting and controlling arm m without subiW-Lthefal'm m and. forming a. loop p thereon whichis tnrnedupw'ardly. Mountedin this nl oop, by means of horizontal pivots is 'a ring pp having pivotally supported therein [by means-fof vertical pivots, the oppgsitely dis- `posed shoesl p2: conforming to ands-bearing .ipon the member e," vibration absorbent ma- Q lterial being disposed between said shoes and ing 'thespr'ihg o to the stem of the fork no friction between the spring and said stem the' member e to prevent the escape of vibrations to Said arm m.

permitsthe member eto beshifted'to vary the directionof the pressure applied to the diaphragm, the universal pivotal support for v the 'arm m permitting said member c to move freely in 'any' direction without pivotal movement 'upon the universal joint.. -By connectis-developed with the lateral movement of the arm-ml thus not only avoiding slight retardationof said arm, but at the same time [avoiding the development of vibration in said spring which might tend to impair the 1 efficiency of the machine.4

The absence -.of cross.l vibrations-throughout vthe apparatus being 'ay desideratum, I

provide .a special form of mount and secure itto the vibrator-.member e in a `special manner-'to avoid any possible looseness of said. vmount with resultant slight rattling which would develop serious blasts" from the instrument lwhenl inj-o'peration. This mount consists .of an'4 orificed head carrying 'a set l crew f for securing the pointfiirmly' in' position, .sa-idfheadbein providlui` with a;V

screw threeded'temirw; 'ch i'svdrlvenplnto i..

' This mechanism is said horn and 4the This form of joint` vis a. tube s the forward end thereof lation to vThe point and1 firmly embedded in the material of which said arm is made. This manner of 'attaching the mount vso compresses the materests upon a base adapted to contain the` drlving mechanism for the platform b, which base forms a part ofthe cabinet d. inclosed by a cover g mounted within which is a horn 7' projecting over the platform b. The-front of this cover I close by mea-ns of lthe hinged doors p orted by the door frame in a fixed position relative to said cover and including said openings.'

clearance for the .conduit system between of the sound box. l

The cover g is hinged at gt adjacent to saidopening. and asA it is turned upwardly carries with it the entire horn, exposing the works of the machine so as ,to permit the placing or removal -of records upon or from the platform b.' To permit this opening of the cover, it is necessary to provide a special joint in the conduit system connecting the horn with the sound box and a specially Ag. having sound outlet openings g2 at the Y top and bottom thereof, the horn being sup- The'ba'ck ofthe cover has an opening g3 therein adapted to lprovide l sound outlet opening c l constructed system of'sound conduits, which .will now be described.

Extending longitudinally of the machine Y havmgacoupling sleeve s' at adapted to slip over and engage the sound the sound box c. The vrear'end of'this tube is provided with an elbow s2 which is con'- nected with a' corresponding elbow s3 carried l.by the, horn 1', by-means of a coupling member t consisting of two members united bymeans of a screw thread. The adjacent arms of the elbows s? and s? each other and their axesare'in exact. alinement with the axes of the hinges for the cover so that as the cover is raised, or lowered, the elbow s3 may turn freely with rethe elbow .s2 and thus preventl the movement of the cover from interfering in any way withthe saidconduit system. j

The coupling s'- vhas 'a tight sliding` tit with it may be readily disengaged, if desired, and

an ordinary outside horn applied to the instrument in lieu of the concealed horn.

phonograph Vis substantially as follows is inserted inthe mount' `-"and-jsecuredanyplaceby the set 'screw j,

are alined with` the-nipple ofithe sound, outlet so that iso y and is then placed upon the record in engagement with the spirally indicated sound waves inthe usual manner. As' the platform rotates, the record sets up vibrations in the vibrator member e which pass along said member to the loop g and through said loop to the diaphragm c2, the member e having no movement in its entirety except about a pivotal point where the loop c engages the loop g. The diaphragm being under tension through the stress or pressure thereon from the spring L, is very sensitive to the vibrations passing thereto, and quickly returns to normal owing to the fact that the action of the spring L' is constant and acts directly' upon said diaphragm through the loop g. Said spring h also applies such pressure in a line or direction opposite to the direction of line of movement of the sound vibrations passing to the diaphragm.

The pointv f3 is held, with the requisite pressure, upon the record by the spring 0 through the controlling or supporting arm m, which is capable of oscillatory movement about a compound axis directly below the axis of the diaphragn'i. The said arm is permitted to follow the arm cwhether it moves verticallyor laterally under the control of the record, and any irregularities in the record, or in the platform 7), are compensated for. The arm m nevertheless, always defines the arc through which the point f3 must travel, the vib ator member e at all times being under the control of said arm m.

When it is desired to use the machine with a gramophone record, the spring is caused 'to exert a pressure upon 'the diaphragm laterallyof the machine, thus causing the direction of the pressure tensioning the diaphragm and the loop g to be in a line opposite to the direction of movement of the sound Vibrations in passing through the vibrator member e and the said loop, which with a gramophone record would be laterally of said member e. If, however, it be desired to use the machine with a graphephone record, the set screw f/' is released and the lever z' swung so as to cause the spring tov extend substantially axially of the diaphragm c2, as shown in dotted lines in Fig. 2, thus varying the direction of the pressure applied to the diaphragm through the loop g so as to bring said pressure in a. direction opposite to the movement oflthe vertical vibrations passing through said member e and loop g to said diaphragm. As the inner end of the vibrator member e is thus shifted relative to th'e diaphragm, the universal jointl through which the outer end of said member is supported andcontrolled by the arm m, permits the member e to shift relative to the arm mwhile at the same time avoiding any looseness in the connection between said member and said arm. This conversion oit' the, machine from a gramophone to a graphophone or vice versa, is accomplished by the variance in the'direction of the pressure applied through the loop. g tothe diaphragm, no other adjustment being required, or if required, being automatic. Owing to the fact that the pressure exerted through the spring it will amount to several ounces, it is desirable to provide positive means locking the lever z' in either adjusted. position, which I accomplish by the construction above referred to.

The flexibility of the loop g will not only permit the adjustment above referred to, but will, by a slight oscillatory movement longitudinally of the machine, compensate for the are described by the inner end of said member when shifted to vaccomplish such adjustment, and also compensate for vthat slight eccentricity of centers about which the arm m. and member c pivot in following the record when the machineis used as a gramophone.

The operation ,of the horn located in the cover of the machine is apparent from the description of the construction thereof, it being evident that-thecover q and the loop -arrying the horn yturn about the same axis with theraising of the cover.'

The reach of the tubular conduit extending` from the sound box elongates the passage through which the sound waves pass before being delivered. thus increasing the etliciency of the amplifying mechanism with a compact structure. Furthermore the detach-ability of the coupling member sfrom the nipple forming the sound outlet, permits the cover f] to be.' raised and the concealed horn l' to be disconnected from the sound box and an ordinary horn to be applied thereto. i

lt is not my intention to limit the invention to the precise details of construction' shownv in the accompanying drawings, it

ybeing apparent. that such may be varied without departing from the spirit or ,scope of the invention. l v

I believe'it to be broadly new to provide an instrument wherein the sound vibrations are transmitted through a vibrator. member to a diaphragm subjected to pressure, embodying therein means for varying the diy rection of thispressure applied to the diaphragm toconvert the instrument yinto either a gramophone or graphophone as desired,

I also believe it to be broadly new to provide a machine wherein sound vibrations Iare transmitted through a vibrator member t0:

iso

brator member adapted to receive vibrations, from areCo'ld and transmit them to said neonata claim as newand desire to have' protected by Letters Patent, is :-'-l

lt--ln'af-phonograph, an amplifier, a viamplifier, means capable of movement relativelyv to saidamphfier connect-lng sald v1 brator member with said amplifier, meansl tensioningl Vsaid amplifier through `said movabletensioning member acting on said" spring whereby the position of said spring `lever in` position.

means in a :direction opposite' to the direction of the'vibration's passing thereto, and means varying the direction of the application of the tension by said' last name-d means whereby both vertical andlateral vibrations may be ftransmitted, through said vibrator member to said amplifier.

2:' Ina phonograph, an amplifier, a vibrator member adapted' to receive vibrations from a record and transmit them to said ampllfier, means capable of movement relativelyto said-amplier, connect-ing said vibrator member with said amplifier, a' spring tensioning'y said i amplifier through said means ina -direction opposite to the direc# tion of the vibrations passing thereto, and 'a v may be changedfto` vary the direction of the application of the `tension by said spring to permit either lateral or vertical vibrations to be transmit-ted through said vibrator member to said amplifier.

3. Inf a phonograph, an amplifier, a vibrator member adapt-ed to receive vibrations from a record. and transmit them to said amplifier, means capable of movement relatively to said amplifier, connecting said vibratorl member with saidv amplifier.4k a.- Spring tensioning said amplifier through said Vmeans in-a direction opposite to the direction of the vibrations passing'thereto,

an `oscillatoryy lever acting on said spring whereby the position ofsaid spring maybe 4 Changed to var v the direction of the appli- 45 cationlof 'the tension by said spring to permit either lateral or'vertical vibrations `to, be

transmitted through Said 4vibrator member y to said amplifier.

and means locking said 4. In a phonograph. an amplifier. a vibrator` member, a supporting and controlling arm for said vibrator member movable at one end abouta compound axis and con# l,nected at the other end with saldvibrator member by av universal joint,`means 'exert-v ing downward pressure upon said arm, means [capable of movement relatively to sald 'amplifier connecting said vibrator member with saidamplifier, means tension-- ing. said amplifier throughsaid means in a direction opposite to the direction of the vibrations passingthereto, and, means vary-fV4 ing the direction o the' application-Lof the tension b vsaid lastfnained meansfwhereby` both vertical and lateral vibrations may be transmitted through said vibrator member to said amplifier.l

5. lin a phonograph, an amplifier, a vibrator member, a supporting and controlling arm for said vibrator member movable at one end about a. compound .axis and connected at the other end with said vibrator member by a universal joint, means exerting downward pressure upon said arm, means whereby such downwardpressure may be varled, means capable of movement relatively to said amplifier connecting' said vibrator member with said amplifier, means tensioning said amplifier through said means:

in a .direction opposite to the direction of the "ibrations passing thereto, and means varying the direction of the applica-tion of the tension b v said last named means whereby both vertical and lateral vibrations may be transmitted through'said vibrator vmember to said amplifier. i

'6. ln a phonograph, an amplifier, a post axially 4below said amplifier, a yoke movable abouta vertical axis mounted in` said post-,

a supporting or controlling arm, lone end of which is mounted on horizontal pivots in said yoke, a. vibrator member, a universal joint c'onnecting the other end of said arm with saidk vibrator member, means exerting a downward pressure upon said arm,.means capable of movementrelatively to said amplifier connecting said vibrator member with said amplifier, means tensioning said amplifier Athrmlgh said means in a direction opposite to the direction of the vibrations passing thereto, and means varying the direction of the application of the tension by said *last named means whereby both 'vertical and lateral vibrations may betransmitted, through said vibrator member to said ammeans exerting la downward pressureupon said arm, means capable of movement rela` tively 'to said amplifier connecting said vibrator member with said 1amplifier. means tensioning` said amplifier through said means ina direction opposite to the direction of 'the vibrations passing thereto, and, means' varying the-direction o the applicationfof the. tension bv said last named means Whereby both vertical and lateralvibrations may be transmitted through said j vibrator'-Ineni-y lill@ lilo i rae said vibrator member and said diaphragm, means tensioning said diaphragm through said loop and said vibrator member in a direction opposite to the direction of the vibrations passing theretoand means varying the direction of the application of the tension by said last named means whereby both vertical andvlateral vibrations may be transmitted throughl said vibrator member pto said diaphragm.

9. In a phonograph, an amplifier, a post axially below said amplifier, a yoke movable about a vertical axis mounted in said post, a supporting or controlling arm, one end of which is mounted on horizontal pivots in said yoke, a vibrator member, a universal joint-connecting the other end of said arm with said vibrator member, means exerting a downward pressure upon said arm, means projecting from said supporting or controlling arm and extending into close-juxtaposition to said post whereby said arm may be held against excessive downward movement, means capable of movement relatively to said amplifier connecting said vibrator member with said amplifier, means tensioning said amplifier through said means in a direction opposite to the direction of the vibrations passing thereto, and means varying the direction of the application of the tension by said last named means wherebyT both vert-ical and lateral vibrations lnay be transmitted through said vibrator member to said amplifier.

10. A phonograph embodying therein a flexible diaphragm, a wooden transmitter arm, a connection between one end of said arm and said diaphragm, and a metallicmount carried by the other end of said'arm comprising a head having a socket adapted to vreceive a. stylus, a screw threaded stem of smaller dimensions than said head whereby a shoulder is formed thereabout, said of said amplifier, whereby lateral vibraf tions passing through said vibrator will be' transmitted to said amplifier, and means .forcing said vibrator member toward the record.

12. .In a phonograph or talkingy machine, the combination of a. record support, a reproducer in operativeA relation thereto, a coverior said record support and reproducer pivotedv for movement about a horizontal axis, and a continuous sound conveyer connected with said reproducer and having a plurality of communicating sections, one of which is mounted for pivotal movement relapivoted for movement about` a horizontal axis, and a continuous sound conveyer connected with said reproducer and having a plurality of communicating sections, one of whichis pivoted for movement relatively to the other about the pivotal axis of the cover, said axis passing through the central axis of said sound conveyer and being so arranged that the conveyer sections remain in complete register with eachother during their relative movement about said axis, substantially as described.

14. In a phonograph or talking machine,

the combination of a record support, a reproducer in operative relation thereto, a cover for said record support and reproducer pivoted for movement about a horizontal axis, and a continuous sound conveyer'with said reproducer and having a plurality ot communicating sections, one of which is movable with said cover, the communicating ends of said conveyer sections being relatively movable about said axis but immovable toward and away from each other or out of register with each other upon the opening or closing of the cover, substantially as described.

f 15. In a phonograph or talking machine, the combination of a record support, a reproducerin operative relation thereto, a cover for said record support and reproducer pivoted for movement about a horizontal axis, and a continuous sound conveyer connected with said reproducer and having a pluralityl of communicating sections, one of which is movable with vsaid cover, the communicating portions of said conveyer sections being relativelymovable about said axisbut immovable relatively to each other in the directions of their axes or out of register with each other upon the opening or closing of the cover, substantially as described.

16. In' a phonograph or talking machine, the combination of a record support, a. reproducer in operative relation thereto, ay cover for said record support and reproducer pivoted for movement about a horizontal axis, and a continuous sound conveyer connected with said reproducer and havmg a plurality of communicating sections, one 'of which is movable with said cover, the communicating portions of said. conveyer sections herring their ones coincident with the piro-tai of seid. cover and being rein- 'ticeiy movable about seid exis, substantie-ily .es

,Tin phonograph 'or talking machine, the combination of sound reproducing eppemtns. e piroted cover the-reiter, haring nioreeient shout eV horizont-:1, exis and a sound enpiiiier movable with seid cover and haring' s snhstnntieiiy inirisontsii3- projecting portion pivotzdj; connected to said sound reproducing apps-retos on e horizontal uns the A iirotied of seid coter and ernpiier honig coin ident suhstnntiniit :is described.

reproth'scing mechanism inciting an inx-Ino\` shie sound holt. e. coter hinged adjacent said hosen-e. horn cnrried h5 and movable with. said. corenend s; con dnitzsjrstem embodying there-- in two tu sections. one end of said sections respectirei;- being connected with said sound son end said horn. and the other ends of seid sections beine" in eonnnunicetion with euch other and s swivel connect-ion between seid ends, the exis ot said connection being in suhstetiei aiineinent. with the exis of seid hinges.

i9. iin e. phonograph. a cabinethevin a hase. a rotstable table. supported thereiy, ineens whereby? said tahe may be rotated. a. reproducing mechanism includingan iin f setuid box. s cover hinged odin-centsid haw, s horn carried by and movable with seid coter, e. conduit system embodying; therein two enguhn" sections. one end of seid ijf being connected with nd seid horn. and .the other' ends of said sections being in connnuniczl-tion with erich other, and a swivel connection he tween seid ends, the axis of said connection being' in substantiel slneinent with the artis of said hinges, and doors carried hy seid coter extending across the inout-h of Seid horn.'1 said doors hating openings therein communicating' with said horn.

:20.- n a phonograph, a reproducing nicchimism embodying thereina stationary soind box hating a nipple surrolmding the outlet opening thereof. a concealed horn, n conduit system. one end of which is adapted to he connected with said horn and 'the other end of which is adapted to he connected with 'the nipple of said sound box. one end of said system having n pivot-s1 relation to the other. whereby the. end .connected to the sound box may be disconnected therefrom to permit the instrumentto be used with either seid concealed horn or with an exposed horn.

2l. En a phonograph. al reproducing mech anisln embodying therein a statiornujv sound box having en upwardlyv directed sound outietopening` :i projecting nipple surroiuiding said opening;` a concealed horn having an inlet adjacenty to said sound box, und a c011- duit adapted to detechabiy engage said nipple and to communicate with the inlet of said concealed horn. Whereb)v said concealed horn may be connected with said sound box or disconnected therefrom to permit the use of :in exposed horn.

)in witness whereof. have hereunto nttixed my signature in the presence of two Witnesses, this 31st dey of M215'. 1911.

I CLINTON B. REP?.

iitnesses Etonr, diventino, F. G. Te-NTWORTH.

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