US1624578A

US1624578A - Sound-reproducing machine

Info

Publication number: US1624578A
Application number: US747892A
Authority: US
Inventors: Buckle Horace Leopold Tucker
Original assignee: Victor Talking Machine Co
Current assignee: Victor Talking Machine Co
Priority date: 1924-02-05
Filing date: 1924-11-05
Publication date: 1927-04-12
Anticipated expiration: 1944-04-12

Description

April 12, 1921.

H. L. T. BUCKLE SOUND REPRODUCING MACHINE Filed Nov. 5. 1924 sheets-snm 1 EL?, l.

/ 'I ze 2 .mvs/vron HTTORNEY f A 1624 578 April 1927. H L. T. BUCKLE s y SOUND REPRoDpcING MACHINE Fned Nov.v 5, 1924 4 sheets-sheet s finan/ver April 12. 1927.

1,624,578 H. l.. T. BUCKLE SOUND REPRODUCING MACHINE Filed Nov. 5, 1924 4 sheets-sheet 4 -v `recorded inthe record tablet.

Patented Apr. 12, 1927.

i rena/e UNITED STATES PATENT GFFIC E,

HORACE LEOPOLD 'rocken BUCKLE, or'vrnvvsnnr, ENGLAND, Assreivonfro vieron TALKiNG MACHINE COMPANY, A oonron'nrion or NEW JERSEY.

SOUNDeREP'RODCING MACHINE.

Application filed November 5', 19554, Serial No. 747,882, and Great Britain February 5, 1924.

My invention relates to sound reproducing machines or talking machines, and particularly to those machines wherein the angularvelocityy of the turntable and the record rotated thereby may be constantly and regularly increased or diminishedv during the travel of the reproducer over a disc record during the reproduction of sound. type of vtalking machine` has certain advantages over thoe machines wherein the angular velocity of the turntable and record 1s maintained constant during the reproduction ofsound'from a disc recordparticularly in the length of a selection which may be n those machines whereinv the angular speed of the turntable is so varied, a. much longei selection can be recorded on the tablet than can be when it is rotated at a constant angular vvvelocity. f

My invention relates then to the recordingor reproducing of 'sound on and from a record tablet in which the angular speed of the rotation of the tablet or record is constantly increased, if the recorder or reproducer moves inwardly from the periphery toward the center of. the ltablet in recording or reproducing sound, or is constantly decreased, if the recorder or reproducer moves outwardlyv from the center toward the periphery of the tablet Or recordin recording or reproducing sound.A

One of the objects of the present invention is to providein a mechanism .of the type above specified, improved means for accurately increasing or reducing the angular velocity of the turntable by varying the position of the governor friction pad by and from the tone arm without substantially limitingor restricting the free swinging movement-ofthe tone arm.

A further object of my invention is to provide improved means for substantially converting a machine which will operate tov rotate arecordat a variable angular velocity and hereinafter termed for brevity a variable speed machine, into a machine which will rotate the record at a constant angular velocity and hereinafter termed for brevity a constant speed machine, and conversely, from a constant speed machine into a variable speed machine.

A further object of my invention is to produce a talking machine which may be converted into a constant speed machine or This a variable speed machine at willlby merely effecting a simple adjustment, preferably accomplishedby throwing a lever into one f position for 'constant speed77 rccordreproduction and into another position for variv` able speed record reproduction.

A further object of my invention is to provide a machine of the interchangeable or convertible type above referredtowith a speed adjusting mechanism which may be operated to increase or diminish the speed of the rotation of the turn-table whether the machine be operating as a constant speed machine or as a variable speed machine.

It has heretofore been proposed to rotate V the turn-table slowly during the recording and reproducing of sound, when the'needle or stylus is at the periphery of the record tablet and ata gradually increasing angular speed as the stylus moves toward the cen- V ter ofthe record so that the linear speed of that portion of the sound record groove, which is in engagement with the stylus at any time, will. be constant (constant'needle speed). To give a constant needle speed'toy 80'v the record, the angular speed of rotation ofV the turntable must vary inversely with the distance of the stylus from the center ofthe record. But in such constant needle speed mechanisms, with a l2 inch record disc, 85A

wherein the sound groove begins near the periphery of the disc, and ends for instance 2 inches from the center of the disc, the angular speed of the record at the end of the reproduction must be substantially three 9otiines greater than itis at the commencement. In such constant needle speed ma chines, therefore, wherein the variation of the turntable speed is produced by varying the speed of the motor, the governor must be capable of giving an acceleration of from lowest operative speed to highest operative speed ofy at least one to three. It is diliicult to construct a governor which willregulate properly over so wide a range of speed, but lou it is essential that' the governor shall control the speed of the motor at all times withy absolute accuracy, because otherwise the re production will'not be in tune.

Moreover, in constant needle speed re- Jthis drag is over- 11o' come to a greatextcnt in reproducing sound at a constant angular speed, because o'l' the high linear speed ot' the groove under the stylus and the momentum ot the turntable. lint in constant needle speed talking ma chilies.` the angular speed ot the turntable is sloiv when the stylus is at the peripher),T ot' the record and the drag on the motor at this time is difficult to control by the `governor and tends to malte the reproduction oit sound out ot tune.

rI`he object ot my invention is to obtain a record and a machine with which it may be played wherein a considerably longer selection may be recorded and reproduced on a record of given diameter than can be reproduced at a constant angular speed, and which will be tree trom the dilliculties above noted.

A further object ot my invention is to accelerate the angular speed ot the turntable at a considerably lovver `ate than that necessary to produce constant needle speed.

A. further object ol my invention is to rotate a record on a variable speed 1nachine during the reproduction ol sound from the peripheral convolution ot the groove considerably taeter than it would be rotated in reproducing sound from the peripheral grooves of a constant-needle-speed record, but considerably slovvcr tha it would be rotated in reproducing sound from the corresponding peripheral grooves ot' a constant angular speed record. This operation also has the advantage that the drag ot the needle at the peripheral portion of a record is satisfactorily orercome by the. momentum ot the turntable, while the acceleration ot the motor troni theslow to the high speed, may be made to be comparativelj7 small, and well 'Within the certain and accurate control ot a well designed and constructed llvball governor n1echanism.

Further objects ot in v invention will appear in the specilication and claims below.

In the drawings forming a part ott' this specification and in which the same relierence characters are employed throughout the various views to designate the same parts,

Fig. 1 is a plan view ot a portion ot a talking machine embodying nrv invention with tone arm and turntable omitted iter the sake ot' clear-ness but with the positions ot the saine indicated in dot and dash lines. In this view the mechanism is set to operate a variable speed machine and the parts are in the relative positions in which they are when the reinfoducing stylus is in the outermost or largest convolution ot' a sound record groove.

Fig. 2 is a plan vien' similar to Fig. 'l but with the parts in the positions in which they are when the reproducing stvlus is in that convolution of the sound record groove ot smallest diameter; that is to say, nearest the center ot the record.

Fig. 3 is a plan vievv ot the mechanism shown in Figs. 1 and 2 but with the mechanism set to operate as a constant speed machine, oit the type used to reproduce orn dinarj,r records.

Fig. il a side elevational view ol a portion ol" a turntable, the tone arm, the goose neck and the reproducer. In this ligure also is illustrated a portion ot the mechanism comprising my invention and more particularl),1 the manner in Which the mechanism is attached to and actuated by thc tone arm. lhe pivotal mounting ot' the variable speed cam lever or member is here shown in vertical crosssection.

Fig. 5 is a plan view and Fig. G is a side elevational view of the l'riction pad carrying member.

Figs. 'i' and 8 arc respectively plan and side elevational vievvs ot the friction pad controlling member.

Figs. 9 and 10 are respectively plan and side elevational views ot the main conversion motion member.

Fig. 1l is a vertical sectional view on the line 11-11 of Fig. 1.

Fig. 12 is a vertical sectional View on the line 12-12 ot Fig. 2.

Fig. 123 is a vertical sectional view on the line lh-13 ot Fig. 3.

lhe talking machine to which my invention may be applied or adapted may com prise the niotoilioa1d l. to the under side ot which is secured the motor trame 2 in which is Ajournaled the spring barrel 3 provided with the. usual driving gear l driven by said spring barrel and meshing with and driving a worm 5, 'last on the turntable spiiulle The said spindle G may be provided \vith a worm gear 7 meshing with and driving a Worm 8 on the governor shaft J which is journaled in bearings 10 on the motor trame 2.

Above the motor-board 1 are the turntable 11 mounted on and rotated by and with the spindle (5, and the tone arm 12, the outer end of which may be provided with a gooseneck 13 to which may be attached a sound box or reproducer 111 adapted to hold a stylus 15 in position to cooperate with the record groove in a disc record 1G placed on the turn table 11. IVhile other llyball governor mechanisms may be used in carrying out my invention, I pre'ler to employ a construction which I have found to be very sensitive and accurate when operated over great ranges ot speed and which is disclosed in I.iettei"s=l.atent ot' the llnited States, No. 1,520,008, granted December 21:3, 192% Such a llvball governor mechanism coinprises the governor sha'lt f) upon which is mounted a governor disc 17 relativelvtrec to slide on the governor shaft 9:1ongitudinallytliereof, and preferably provided with a -huborcollar 18`integral therewith. Y. Also -a weight or flyball'22 by a screw 23, said Screws 23 serving to secure the springs 2O and the rigid members 21 firmly together and to the weights or iiyballs 22.

Between the fixed collarl 19 and the hub 18 ofthe governor ydisc 17 and tending to hold them apart is a spiral compression springv 24l whichV surrounds the governor spindle-9.

A'In tliis'governor mechanism in order to prevent the pulll of the weights 22 on the governor disc `17 from becoming excessive, theA weights'22 are mountedvon the connectingmembers'between the fixed collar 19 and thegovernor disc 17 substantially nearer to the fixed collar than to the governor disc, the distance ofthe weights from the i'ixed collarwbeing5for-example, from one-half to one-thirdof the distance ofthe weights from the governor disc.

The 4pull ofthe weights increases rapidly with the distance that they move away from the axis ofthev rotation of the shaft and therefore it is desirable that the weights should'notA move too far away from the axis of the Shaft and consequently they should be connectedto the spindle by the relatively short rigid arms 21.

Cooperating with the friction disc 17 is a frictionpad 25k mounted on and carried by the friction pad carrying member 26. As the governor rotates the weights 22 iiyoutwardly tending to straighten the slightly curved springs 2O and'to pull the governor disc 17 towardtheleft (in F ig. 1) and to compress the spring 24. The extent to which the governor disc moves to the left is Ceterminedv by they position of the friction pad 25-and consequently the speed at which the governor andthe motor controlled thereby shall operate is determinedjand regulated by the position ofthe friction pad'25 with respect 'to the governor'disc 17.

Referring now particularly to Figs. 1 and 2" wherein the parts are shown so adjusted as to cause the machine. to operate as a variable speed machine, on the base platey 27 suitablysecured to the motor-board 1 by screws 28vis pivotally mounted the variable speed controllingV cam member 29, the same comprising an arm 30 preferably provided at its outer end' with an antifriction roller 31 mounted on a pin or screw 32 fixed to said arm, saidY roller being adaptedl to smoothly litt into a slot 33 in an arm or bracket rigidly secured to the underside ofthe tone arm 12 as by screws or rivets, and having the free end thereof extending under the turntable 11 as-clearly shown in Fig. 4.

Said member 29 also comprises a cam 36 and a rather long pivot pin 37' rigid therewith and preferably fitted into a socket 38, rigidly` mounted in the base plate 27, and providing aV smooth bearing for said pivot pin 37.

In the bottom of said socket 38 is preferably seated a ball 39 forming a thrust bearingfor the pivot pin 37.

To prevent the accidental removal ofthe member 29 from the plate 27, said pivot pin .is preferably provided with a groove 49 into which lits'the free oset end41 of the bracket'42 rigidly secured to the base plate 27 by a screw 43, said free end 41 being provided with a semicircular. recess which fits closely around and adjacent the bottom` of the rgroove 41 in the pivot pin 37.

The cam surface 36 ofthe cam 36 ispre'ferably arranged so that it decreases or re-A cedes toward the axis of the variablespeed cam member 29 as the sound-boxfmoves to ward the center of the turntable.

The cam surface 36 is arranged to coop-- erate with a friction pad controlling mem-- ber 44 which preferably comprises a bell crank lever having onearm 45 provided at its free end with an antifrictionv roller 46 mounted to rotate smoothly on a vpin or stud 47 on said lever and to normally bearagainst the cam surfaceBG. The other arm 48 of the lever .44 is preferably provided.' with a straight edge 49 extending radially from the axis of the pivot pin 50 which is rigidly mounted in the lever 44. The pivot pin 50 is rather long and is smoothly Vjournaled in a socket 51 (seeFig. 12) which in turn is rigidly mounted in and carried by the main conversion member 52; In the bottom of this cup or socket 51 is thrust ball bearing 53 upon which the lower end ofthe pivot pin 5() rests. The accidental removalV of the friction pad controlling member 44 from its bearing in the socket 51. is preferably prevented by a bracket 54 which may be rigidly secured to the member 26 by a screw 55A, said'bracket having a free offset end 54 adapted to extend over the upper surface of the bellcrank lever 44 and to bear upon the upper end of thepivotA pin 50.

The friction pady carrying member 2G (see Figs. 5 and 6) is a long irregularly shaped member and carries V'near one end thereof a downwardly extending bracket or arm 56 in the free end of which is mounted the friction pad 25. Vhen mounted on thel plate 277 this bracket or arm 56 extends downwardly through a suitable opening 27 titl over the governor and into the path of the governor' disc 17. Un the upper side ol said member 2G and near the end thereof is an antifrictiou roller 57 mounted to turn on a pin or stud 58, while the other end of said member' 2G is provided with a relatively long rigid pivot pin 59 extending downwardly therefrom and fittingl into a socket- (39 (sec l1 ig. ll) rigidly secured to the speed adjustment member Gl. rl`he lower end of this pivot pin 59 preferably rests on a ball thrust bearing 02 in the bottom of said cup or socket GO and said pin smoothly lits into the bore of said socket (30. To prevent the accidental removal of the friction pad carrying,l member 2li from said socket 60, l, preferably provide a bracket (i3 secured to the speed adjustment' member el by a screw G4, said bracket having an overhaningl upper end 63 adapted to bear on the top of the pivot pin 59. On the underside of the member 2G l j n'eferably provide a stud or projection (35 adapted to bear ou and slide over the plane upper surface of the base i plate 27 so that such friction pad carryingr member may swing on its pivot pin 59 smoothly in a. horizontal plane parallel to the upper surface of the base plate 27.

lVhen the member 2G is mounted in the manner above referred to, the anti/friction roller 57 at thc outer end thereof is in the plane of the arm 4S of the friction pad controlling member -l-Ll as the latter swings about its pivot pin and the straight edge 49 ol said arm 4:8 is normally in engagement with said roller 57.

About the pivot pin 59 of the friction pad carrying' member 2G a spring Go' is preferably coiled, one end of said spring; beine,r hooked over the edge of the speed adjustment member (l and the other end ol said spring being; hooked over the edge of said friction pad carrying member, the tension of said spring GG beingr such as to tend to throw the friction pad carrying member 2G in an anticlockwise direction (Fig. l) about the axis of its pivot pin 59 to normally hold the roller 5S against the straight edge t9 of the friction pad controlling member elli.

The speed adjustment member 6l comprises a two armed lever, to the end of one arm 67 of which the said friction pad carrying member 2G pivotally connected, as above described, and to the other arm GS of which is attached a handle G9. A pointer 70 adapted to be manually moved with the member Gl over a suitable dial 7l to differentI positions is at the end of the arm (58. This speed adjustment member Gl is pivotally mounted on a stud (see Fig. 13) ri gidly secured to and extending upwardly from the base plate 27, a friction washer 73 being jn'cfcrably passed over the stud 72 before the speed adjusting member (il is placed thereon so that the washer T23 is inlei-posed between the member 6l and the top ot the plate 27. Another friction washer 7a is preferably placed on the stud 72 and above the member 6l so that the speed adjustiner member is located between the two friction *ushers 73 and 74. The stud 72 is also preferably provided with a circumferential channel or groove just above the upper friction washer 74 for the reception of a U-shaped buckled spring` 7G which when slipped into the channel 75 applies a friction to the free movement of the member b'l and holds the said member Gl lirmly in any adjusted position.` The operation of this speed adj ustingI mechanism will be further described below.

The main motion conversion member 52 is pivotally mounted on the base plate 27 on a pivot pin 77, a washer 78 (see Fig. 10) beingl preferably interposed between the base plate and the member 52 so that the arms of the lever or member 52 swing in a plane parallel to but just above the plane oit' the top surface of the base 27. The base plate 27 and motor-board l are both provided with alined arc-shaped slots 79 so that the socket or cup 5l may project freely therethrough and swing about the axis of the lever 52 without contact with the base place 27 or the motor-board l (see Fig. 12). This arcshaped slot 79 is concentric with the axis 0f the pivot pin 77. y

Projecting.;` outwardly 'from the axis of the stud or pivot pin 77, the member 52 is provided with an arm S0, the outer end of which is provided with an oil'set shoulder nl extending upwardly therefrom, and through this offset end or shoulder 81 is threaded an adj usting screw 82, preferably provided with a lock nut 83, and lying in the plane of the end of the arm 48.

The opposite end of the member 52 is provided with a pin or stud 84 to which one end of a link S5 is pivot-ally attached, the other end of said link being pivotally connected to the free end of one arm 86 of a bell crank lever S7 by a pivot pin 88. The other arm S9 of the bell crank lever 87 is provided with a handle 90 by means of which the bell crank lever 87 may be manually swung or moved on its pivot pin 91 lixedly mounted in the base plate 27. This member 52 with the link 85 and bell crank lever 87 constitute the main operative parts of what may be termed the conversion mechanism.

Also secured to the base plate 27 by a screw 92 is an arm 93 having an end 93 upturned into the path of the. movement of the member about its pivot 59 but below and out of the plane of the end of the arm of the member del. This arm 93 may be adjustably positioned so as to prevent any excessive movement of the member 26 into an anticlockwise direction about its pivot 59 during the manipulation of the'conversion movement. It may here be notedthat when the conversion motion lever 87 is `in the 'position shown in F ig. l, then the ymechanism isset for variable speed operation and when the lever 87 is thrown to 180othe position shown in Fig. 3 then the mechanism isset to operate as aconstant speedmachine. By making that end 85 of the link 85 which is attachedto the conversion motion lever 87 curved so that it substantially fits around f the hub of the lever 87, the contact of the Aclockwise ldirection and the contact of the convex'edge of the said'curved end 85 of said link 85 with vthe downwardly offset end 89 of the arm 89 yforms a limit or vstopmotion for the member 87 in a clockwise direction. By swinging, then, the lever 87 to the limits ofitsfmotion in either direction, the 'talking machine above described is most easily and readily converted from a constant speed'machine into a variable speed machine and vice versa.

To provide for the vfree and unrestrained movement of the vsocket or cup 60 about the axis of the pivot pin 72 ofthe speed adjustment member'61`, the base plate 27 is provided with an arc-shaped recess 94 and the motor-board is provided witha similar arc-shaped hole 94 in registration therewith as is clearly shown lin Fig. 11. :Stop pins 95, 95 may be rigidly attached to the base plate 27 to limit the movement ofthe arm 68 in either direction.

Having now described with considerable particular-ity the structural arrangements speed operation, the turntable 11 is assumed..

to be vturning in aclockwise direction driven fromk the motor, the spindle 6 of Vwhich is turning in a clockwise direction. The governor is rotating and the centrifugal Vforce of the iyballs or weights 22 has drawn the governor disc 17 up against the face of the friction pad 25. The turntable 'may be as# sinned to be turning comparatively slowly in this position, the stylus 15 being assumed to be inthe outermost convolutions 96 of the record Agroove at the point 98. Y

As the tone arm is swung transversely over the Vface of the record by reason of the engagement kof the stylus with the sound record groove, the arm Vor bracket 84 is swung 'with it from the position shown in full lines inFig. 1, lslowly into 'and through the first position shown to the left in F ig. 1 "in Adotted lines, and finally yto the second position shown to the left in dotted lines wherein the stylus is in engagement with the innermost convolutions 99 of the sound record groove and at the point 100.

This slow motion of 4the arm or bracket 84 causes the variable speed control cam member 29 to slowly swing about the pivotal axis of the pin or stud 37 in ananticlockwise direction from the position shown in full lines in Fig. 1 to that shown in Fig. 2. During this slow swinging movement of the member 29, theroller 46 on one end vof the arm of the friction pad controlling member 44 follows vdownwardly on the cam surface 86 by reason of the pressure exerted by the spring 66 on the friction pad carrying'member 26, lthe roller 57 on the endof which is held spring pressed against the straight edge 49 of the arm 48 of the member 44. Thus the roller 46 is held pressed against the cam surface 86 throughout @he traverse of the tone arm 12 over the record 16 during` the reproduction of sound therefrom.

But as vthe friction pad controlling member 44 thus slowly swings in 'an anticlockwise direction about its pivot pin 50 permitting 'the friction pad carrying member 26 r-to `thus slowly swing about its pivot pin 59 in an anticlockwise direction, the vfriction pad 25 is constantly slowly moved to the left into the position shown in Fig. 2. lhecentrifugal force developed `by the rotation of the governor shaft 9 draws and holds the face of the governor disc against the pad andthe speed of the motor therefore constantly increases throughout the travel of the tone arm over 'the recordlduring the reproduction of sound therefrom.

Vhether the rate in the increase in the speed of the motor be constant or variable depends upon the shape of the -cam 86. The operation may be either, and if the recordfbe originally recorded in a master'tablet by a mechanism controlled by a similar cam, then'the reproduction of sound from such a frecord will be like the original sound recorded. My invention comprehends theoperation of a variable speed machine wherein the rate in the change in the speed is constant or variable.

During vthis reproduction of sound at a variable speed the only parts of the .speed controlling mechanism which are actuated by the arm or bracket 34 are the variable speed controlling cam member 29, the friction pad controlling member 44 and the friction pad carrying member 26. All the -other, parts of the said mechanism shown 'in Figs. 1 and 2 are unaected yby the 'movement of the tonearm.

If now it should happen either from 'the 1111111111 For 11111 11111111111111111011 111' :1 111111111111111' S111eetio11 1'111'01'11011 in 11110 1'e1'o1'11 111111111.'n @111:11 for insinnee. :1s 111e pitch of 111e 511111011011 11e/11111' too 111011 o1' 1011' :1S reproduced on 111e machine. the 01111111101' 111:11y 11111011' the pointer ot 111e Spoed edjnntinent 1111111111111' Gl to 111e right to deereosae 111e speed of 1:1111 1110101' 11nd to lower 111e 11111111 o1 111e Fe1ee tion 111111111' reprodneed o1' to 111e 11e-ft to i11- ereafe 111e Speed of 111e 1110101' $11111 1'11iee the 11111011 o1. 111e eeieetion 111111111: reproduced. 111111111 this Speed edinetine; 111111111101' G1 is swung to t11e right` 1111` end of 111e 11111311011 111111 carrying; 111e11111e1' QG eonneeted thereto swings to 111e 1'1111111, 11111111111; 111e 11:111 0111'1'1'- 11111; 1111111111111' 211 11110111'` 111e w11111111111 111111111111' 111'1'1vid11d 1111 111e 11111111' 11n 111e Straight edge 19 and :1t 11111 1111111111 tinie drawing! 111e reid 111e1111. 1111' :211 :11111111 1111' S1 ':1i; 1'11t 11111111 110. 11'1111'11, :1s :1110111 111151111111111` 111111111111111' lnnlieo :1 s110111' 11111111' 1o n 111:1111' 1101'111111 lo the axis 01; 111e 110111111111' s111111', .(1. '.111111. 111ove111e11t ot 111e 1111111111111' 211: therefore, moves 1110.11'11'1'1011 11111125 11'1111'11'111'1111111' to the fece o1E 111e dise '17. 111111 :111 111e 111111111 time slightly against it, 1.11115 'touring 111e disc 1T to Vthe rig'lit :11111 reducing 111e speed of' 111e `governor :1nd 111e 1111-11'11:111i:1n1 0011110111111 11111110111'. Conversely, 11 movement o1' the lever (1S to tlie 1e'1t Slightly nieves the 111111 25 to the left :11111 inerenffee 111e Speed of 111e 1110101'. A 001151111111111111 111011011 of the 111'111 (1S producen :1 relatively slight 111011011 01" the 'friction 111111 Q5 toward oi.' 111111111' from the friction 11nd l? :1nd thun is operated n delicate speed adjusting; mechanism te i11- erease 01' diminish the 1111111111 01 111e motor. B111; this manuel operation ot 111e speed adjusting 1111111111111' (il does not :111eet o1' 1110110 in :my 11:11; t11e variable Speed Controlling 11111111111111151111 or change 111e :11111111111101111 o1 the ports tliereo with respect to 11:11:11 other. 1111115 While 111e speed 1'111'1'11111' 1110011- 1111is111 is operated to reprodnee 50111111 1111'0111 11 record 111111011, t11e 1111011 111:11' be vnried Without inierrupting' the 001111111101111 oper ation of the speed varying 11'1e1'11s1nisn1.

After the 50111111 recorded 111 record tablet 111111 been reproduced, the sound 110x 111:117 11e lifted 'from 111e reeord :1nd 811111111 io the lei't 0111111111111' to the periphery of the 1'111101'1'1 :1nd :11111111 1111101111 in 111e 501111131 record grooves 'for :1 eeeond reproduction o1' 110111111 11'11111 the record Without stopping the 111111111'. In thus swinging the tone :11111 0111111111111' to 111e periphery ot 111e record, the 1'11111111le Speed 001111111111111' 1:11111 1111111111111' S29 11111 11e 1111111111 in :1 clockwise direction about its pivot pin 31' 'forcing 111e bell crank 1eve1' in 11. eloekwise direction 11110111 its pivot pin 50 :1nd 11111111 forcing the 111111 eerrying 111111111101' to turn in e clockwise direction :111011t its pivot pin 59, thus fore ing' 111e '11111111111 11:111 :1113111111 t11e governor dise l1 111111 111111111113y 111e `5:101'111'1101' dise 1,7

:1 sound 11:11'11' 111 111e 1111111111011 11111111111 in Fie'. '1., 1111115 redneingr 111e epeed o1 11111 governor to that appropriate 1"'01' 111e reproduction of 510111111 1:10111 111e outermost eonvohniono of the record. It for :my reason 111e stylus 11e not swung; 011111111111111 to :1 position correspond 11111' to 1111111 111111111111111 by the 11F-.merel 98 but to 11011111, 110111111011 11111111111011111111 111e positione` 9:3 :11111 1110, :1S '1101' 1111111111111. 1:0 reproduce :1 Second time :1 Certain 11:11't o1. J111e recorded 511111111111011. 1111111 i1: will 11e 011Se1'ved that the 1'0111'1' 11:15 of 111e 1111111111111' 4&1 willL 11e on tl111t 11:11:11 o1' 111e ef1111 snrlnee 313 which 1101'111 1111011111; to 111e epeed :1t whiff-,11 the record should rotate `for 111111` 111111110111111' 11:11't ol. 111e reeord. 111 011101.' 1111111191 to w1n1teve1' 1109111011 111e 511111111 111:1 1T 11o nioved over 111e '1:1111 111' 111e 1'111'111'11 :11111 11111111 1111011111111 into 11111111111111111111; with 1111'` 111|1'111ee 1111 111e record, 1111111 the speed o1 111e 111111111111111 11'111 11e 11111 1'111'1'111'15 :111111-111 101' 111e 1'1'111'01'11101'1011 o1 50111111 1'1'0111 1:11:11' 111111111111111' 11:11'1l 01 111e record 1111111111. A111111' 11:11'11111 once 1:11'1111 eet to 011er- 111'11 :1S :1 1111111111111, speed 111111111110, t11e 111:111111110 111:1 1' 1111 operated 11110 :1n ordinary talkingY 111:1111111111 1111 placing 111e Stylus on :my part 0'1" the record :1nd correctly reproducing 110111111 therefrom.

Referring' new to Figs. 2 :1nd 3, it 111:157 11e assumed that :111er tlie reproduction o1 sound 11'0111 f1 variable speed record 11:15 been eo111pleted :1nd the 111111.11 :1re in the 11ositlon shown in F151. 21 11111, Conversion 1110- tion member S9 1111s 1.1111111 swung 'lroni the position shown in Fig'. 2 to 111e position 511011'11 1n Fig. 3. In 5111115511111; 111e l111ndlo 90 110111 the 10mg position 1011111 1111111111111 posi# lion, the n1e1n11e1' Si' 111111 11111111 511111115111111111111 Snbetantizdly 1.800 :1nd 11111 111111 85 111111y 1.1111111 thrown 11 distnnee 11111111111111in11y 111111111 1o 111111 111111111311 o1E 111e 1111'011' o1' 11111' 1'1'111111' o1' pivot pin 8S :1110111: 111e 1111111' 511 o1'` 1111' 1111111111111' 8T. This longitudinal 111111'1'111en ol: 111e 111111 W1 Swings 111e 111111.11111 170111111111011 1111111111111' .52 in :1 Clockwise 1111110111111 :111111111 ile 1111'01 11111 71' 12110111 111e 110111111011 111101111 111 111111'. i to 111:11 1111111111 111 1""4 f. '1111111 11111111011 111' 111e 11111111- 11111' V12 :1110111 its 1111'011 11111 TT 1'111'1'11'11I 11111 V11'111- 111011111111 @111111111111111 1111111111111' 1l 1111111111111'1111v 111111 :11111;` "111111 111:1 1'11111 11111 1.1111` 1111' 1111111111111 of the 1'011131.' 57 :11131111111 1:1111 111111111111, 11115111 111111 110111 the 11111111" -11'1 :11111111111 111e. 1'11111 11111 fnee 36 until 111e 11:11'1 1e 01"'1'110 111'111 1S encounters 111e `11'1111 11111'111'11111'1

end

1,13 o1`i 111e rigid stop :11'111 113. A1501' 1111111 01111511111111111111 the :11'111 11S is no 101111111' turned .1111:111 :intieioekwise direetion 111' 111e tree 111111 of 111e pod Carrying 1111111111111' 213 1111t t11e, pivotal socket 51 111 11'1111'11 11111 111111 111111101111133' inein- 1Je1' 411 ifs 1111011111 1'01111111111111 lo move downwardly or in 11 clot-111111111 direction :1110111` 111e pivot 1'1" carrying 1111' :11111 `J1 of the 11101111101' L14 donnWnrdI)7 :11111 :111111 1'1'0111 11110 1:11111 S111'- 1111'11 511i. '1111111 1111111011 111111111111011 1111111111111' 52 is time turned :11101111` .its pivot 7T, the :11'111 80 is `swungftowardf t-he arm V448 iof the =pad controlling -'-1ne1nber 44 and the -end of: the adjusting screw 82 finallyengages the 'backside of the arm 4-8. This-screw `82 -is so adjusted and set that when fthe :handle 90 of the member 87 has reached the position shown in Fig. 3, the end -of ythe screw 82 shall have engaged the -arm 48 of the vpad controlling member 44 and'moved it about its pivot 50 and "with it the friction padcarrying member about is Ipivot 59, a distance siu'iicient to bring the pad 25 into that position -which will cause the turntable to revolve at 'the speed v'usually maintained in reproducingl sound :from constant speed records,-that is `to say, into a `position which will cause -the turntable to revolve at substantially 78 revolutions permiuute. The parts are now in thep'osition Yshown yin Fig. 3. The free end of the arm 45 of the pad controlling pmember is remote from the cam surface V'36. The 'tonearm may be swung about vits pivot freely and in doing so it will swing the variable speed control cam memher 29 about its :pivot 37 but -such motion is linoperative to produce an-y contact' between the-cam'surface 36" and the rollerV 46. iWith the parts constructed, arranged and disposed lin vthe manner above described, the tone arm is substantially just as free to be swung over the record asit 4would be in an ordinary Constant speed machine.

In thus swinging-the conversion ymotion lever from the position shown in Fig. 2 to tha-t shown in Fig. 3, the variable speed mechanism is lthrown completely out of action and theA constant lspeed controlling mechanism, comprising 'the arm 80, the adjusting screw82 and the lock nut 83, is thrown Yinto operation to yset the governor for constant speed reproduction.

But having been thus set for constant speed reproduction, it maybe that by reason of lfaulty adjustment or -wear ofthe parts that the turntable `is runninga little faster or a little slower than the standard speed of`78 revolutions per minute for Athe reproducion of sound from ordinarv constant speed records and ifi for that or any lreason it is desired to increase or diminish the speedof the motor it :is merely necessary to adjust the lever 68k slightly to the right to decrease :the speed, or slightly to the left to incre-ase the speed ofthe motor. And this adjustment of the speed for constant speed operation is precisely like that for variable speed operation in that no parts of the mechanism are moved except `the Speed adjustment member 6l Land the pad Supporting or carrying member 26, the friction pad on the kmeimber 26 beingm'oved over the face of the friction disc 17 'and slightly against it when the lever '68 is moved 'toward the slow position andaway from the face of the governor disc 17 when 'the said Jlever is moved toward the fast position.

It is to -benotcd that if Athe rigid stop arm 93 were to be omitted and the conversion lever 87 were to beswung from the position shown in Fig. 2 to that shown in Fig. k3, the pressure of the free end of'the pad supporting ymember 26 would continue to swing Ithe member let about its pivot and would hold the roller t6 again-st the cam surface 36 until the end ofthe screw 82 shall engage the back ofthe arm a8 ofthe lever del. The distancel which the friction 'pad might thus move away fromthe governor disc 17 before the engagement, above referred to, of the screw 83 withthe-baclof the arm 48 might be considerable, and enough to permit the governor to rotate at an excessively high speed, possibly higher than that at which it was designed to run, with the result that the governor might become broken .or strained to an extent suiiicient to injure or interfere with its proper operation. The free end of the rigid arm 93 is therefore preferably adjusted so that the upturned end 93 thereof will be engaged by the 'pad carrying member 2G duringtheoperation of the motion conversion member as soon as the pad reaches a position which permits the governor to revolve'a little faster than it does when the machine is being operated at its highest speed as a variable speed machine. Vhen, therefore, the motion conversion lever 87 kis swung to the position shown in Fig. 3, the end of the yscrew 83 should engage the back edge of the arm 48 just prior. to the completion `of its full movement, Yto move the member 26 slightly and out of engagement with th-e upturned 4end 93 of the arm 93.

It will new be seen that lhave provided a mechanism in which a talking machine motor, 0r broadly, a talking machine, may be converted at will from a variable speed machine into a constant speed machine by merely throwing the lever 87 from one position to another and a constant speed machine may be similarly converted into a variable speed machine by a simple movement of the lever in a reverse direction. lVhet-her the mach-ine be operating as a constant or as a variable speed machine,- the speed of the motor may be increased or decreased by a speed adj usting lever, the operation of which does not disturb in any way the adjustment of the part-s of either the constant or thev variableV speed mechanism.

A minimum amount of work is .imposed upon the stylus when operating with my invention. During the reproduction, the cam moves from a high to a llow position and the roller slides or rolls 'down on the cam surface 36. Upon the spring 66 is imposed'the work of moving the friction ipad vduring the reproduction of sound from a record. The cam merely controls the posin tion to which the 'lree end ot the arm i5 ot the member' il may move. The roller l? ich lows the cam surface and movement is in1- parted to the lever elfi by the Spring,T 66. The pressure between the roller lo and the cam surface 3G is slight during the reproduction ot sound from a record and consequently the friction between the cam 3G and the roller LG ia correspomlinnly alight. By mannali;T throwing the motion conversion lever S7, the speed varying niechanism 11u13,T be thrown at will ont ot operation and the pad will be simultaneously positioned with respect to the ,ejovernor disc for constant Speed operation oi" the motor, and, conversely, by throwingY the lever 8T in the opposite direction, the constant apeed varying mechanism thrown absolutely ont ot ope ation and the speed varying,` mechanism ir thrown into operation, to convert the machine lfrom a variable to a constant speed machine and vice versa.

l'lavinpT thun deecrihed in v inventii'in, what I claim and desire to protect by Lettere Patent ot the United States ie:

Il. In a talking' machine, the combination with a motor, a turntable and a reproducer, ot a constant speed controlling mechanism, a variable speed controlling mechanism actuated by said reprodncer, and a conversion member connected to both said mechanisms and manually operative to alternately throw said mechanisme` into operative relation with said motor.

2. In a talking,r machine, the combination with a motor, a turntable and a reproducer, ot a constant :speed controlling mechanism, a variable speed controllino` mechanism actuated by said reproducern a convcinion mcmber connected to both said mechaiiisma and manuall5T operative to altermiteliY throw said mechaniame into operative relation with :raid motor, and manually operable means cooperating with Said .mechanisms to increase or dccreaae the Spoed ot Said motor without dialurbingg ihe adjuistmenta ol either oli said mechaniema.

-l. In a talltinn' machine, the Combination with a motor, a turntable and a reproducer, ol a consta t aperti controllingl mechanism, a variable speed ccmtrollinn mcchanifan ac tuuted by Said reprrnilucer, a couveraion member connected to both Said mechanianui and manuali)Y operative to allernatcljiv throw said mechanisms into operative relation with said motor, and menne to limiti the speed at which said motor mai7 run during` the morement of said conversion member.

Ll. In a talkingr machine, the combination with a motor, a turntable and a rcpriulucer, ot a constant speed controlliiigi mechanism, a variable speed controlling,` mechaniem actuated b v eaid rcproducer, a conversion member connected lo both said i'nccl anielne and manually operative to alternately throw Said mechanisms; into operative relation with said motor, and means to prevent said motor from racing' duringI the operation ol' said conversion member.

ii. ln a talking machine, the conibination with a motor, a turntable and a reproducer, including' a stylus to track in the groove oil a dise sound record on eail turntable, oli a speed varying and controlling mechanism, and means'h to automatically pl'ogresaivel)f adjust said mechaniem to accord with the position of the reproducer stylus with repect to a record on said turntable to produce a continuallj,r increasing angular speed ot said turntal'ile but a continually diminishing linear speed et the l roove at the pointe-t' the engagement ot the Stylus therewith, as the reproducer movea toward the center. ot l@aid turntable.

(i. In a talking;r machine, the combination with a motor, a turntable and a reproducer, including a stylus lo track in the `groom of a disc sound record on Said turntable, of a speed varvlnrY and controlling mechanism, and means to automatically progressively adjust said mechanism to accord with the position ot the reproducer stylus with respect to a record on said turntable to produce a continually diminishingr angular speed olI rotation ot' said turntable but a continually increasing; linear speed oi the groove at the point o the engagement ot the stylus therewith aa the reproducer moves toward the pe iipheri7 oit said turntable.

7. In a talkingl machine, the combination ot a motor, a turntable and a replo'ducer, in eluding;v a stylus to track in the groove ot' a disc sound record on said tin'ntable, of a speed varying and controllingr mecl'laniem, and means to automaticalljiT progressively adjust Said inechanien'i to accord with the poration ot the reprodacer stylus with respect to a record on Said turntable to produce a continuallyY increasing; angular Speed of rotation ot said tinntablo but a continually diminishing' linear speed ol the groove at the point ot the engagement oi the stylus there with, as said reproducer moves` to ard the center oi said turntable and to produce a continually decreaainfi' angular speed o'l ro tation ol' wahl luriniablf-x but a continually in creasing); linear Speed ol the `groove at the point oli the engagement ot the st vlim4 therewith as Said reproducer moves toward the pcripheiwr ot Said turntable.

Si. In a talking machine, the combination with a motor. a turntable and a reproducer, including` a stylua` to track in the groove oit a disc sound record on said turntable, ot a speed varyingl and controlling mechaniem, and means to progvireasivelv automatically adjustsaid mechanism to accord with the position oi' the reproducer stylus with respectto a, record on said turntable, to produce a conloo tinually increasing angular speed of rota-tion of said turntable as said reproducer moves toward the center of the turntable .and to producea needle speed of theperipheral convolutions of the record groove lower than that of the .peripheral,convolutionsof a constant-angular-speed record oi.' the saine size, and higher than that of the peripheral convolutions ot va .constant-needle-speed record of the same type.

9. In a talking machine, the combination with a motor, a turntable and a reproducer,

.including a stylus to track in the groove of .a disc sound .record on said turntable,'of a speed varying and controlling mechanism and imeans to vprogressively automatically yadjust said mechanism to accord with the position of the reproducer stylus with .respect toa record on said turntable to produce a .continually diminishing angular speed of the rotation ot' said ,turntable as said reproducer moves .over said turntable `toward .the periphery thereof and to produce va `needle speed of fthe peripheral .convolutions off said .record When said stylus is in lengagement therewith lower than that of spect ,to a record on said turntable to produce a continually increasing angularspeed ot' said ,turntable as said reproducer moves toward .the center of said turntable and a continually .diminishing angular `speed -`of rotation of said turntable as saidreproducer moves toward 4the periphery of said record and to produce a .needle Vspeed .of `the .peripheral convolutions of said -disc record when .the stylus is in engagementitherewith lower `than .that .of fthe peripheral convolutions of a constant-angular-speed record of the same size, and ,higher than that of' the peripheral convolutions of aconstant-needlespeed record ofthe same size. f 11. In a.talkingimachine.the combination .with a turntable, a reproducer, .a motor .for rotating said turntable and `a governor mechanism comprising `a kgovernor disc, a `friction pad and centrifugal means fonholding said governor disc against 'said pad kto control the speed of fsaid motor, of means to operate said motor at `Will 'as a variable 'speed or' 'ajconstant speedjin'otor, comprising `'automatic speed varying .means for slowly 31110.' ingl jsjad ip'aid .wthrespeet vto said l gavernord-isc .to increase .the speed of said motor as `the reproducermoves toward the center of lsaid turntable and to decrease said speed as the reproducer lmoves toward the periphery of saidturntable, and manuallyoperableconversion means to throw at Will said speed varyingineans out ot operation" and to simultaneously stationarily position said pad with respect to said governor disc for const-ant speed operation of said motor and conversely -to `throw at Will said `automatic speed varying means into operationandsaid pad from constant speed operation position.

l2. In a Vtalking machine, the combination with a turntable, a reproducer, a motor for rotating said turntable and .a governor mechanism comprising a governor disc, a friction padand Centrifugal means for holding said .governor disc against said pad to control the speed 'of said motor, ot vmeans to operate saidmotor at Will asa variablespeed or a constantspeed motor, comprisingautomatic speed varying means for slowly Vmovingsaid `pad With respect to said governor disc to increase the speed of said .motor as said reproducer moves toward the center yof said vturntable .and .to decrease said speedas .said reproducer moves toward the periphery ot' said turntable, manually operable conversion means A,to throw at will said speed varying means out of operation and to simultaneously stationarily position said pad With respect to said governor `disc for constant speed operation ot said motor and conversely to throw .at Will said speed varying mea-ns into operation from constant speed operation position, and manually operable speed adjusting means to adjust said pad .to- Ward and aivay from vsaid governor disc Without changing the adjustment of said 'automatic speed varying means, or of said constant speed operation Whether said motor is operating as a constant or avariable speed motor when said manuallyadjusting ymeans are operated.

13.'. In a 'talking machine, lthe combinai tion Witha turntable, a. motor for rotating saidturntable fand a governor mechanism comprising a,governor disc, a friction-pad and lvcentrifugal means .for holding said governor disc against said pad'to control the speedo said motor, of variable speed controlling means ft'or gradually automatically moving said friction pad with respect .to saidgovernor disc to operate said motor as a variable speed motor', manually operable conversion means to throw at will said Speed varying nieanssiont ooperation and rto simultaneous- `ly stationarily[position said rpad with.. refepect to said 7 governor disctooperate said motoras'a eonstant speed 'motor' and .manuyally.operable speed adjusting ineansto .ad-

,just sadpad-vvith respectto said gOvernor disc .Without aiectingfthe adjustment .of vlsaid automatic speed 'varyingmeans 0r of said constant speed operation of said motor whether said motor is operating as a variable or as a constant speed motor.

14. In amachine tor reproducing sound from a dise sound record tablet in which the record oi sound is in the iorm el a spiral groove in a tace thereoi, the combination with a reproducer, a motor :lor rotating said tablet, a governor mechanism comprising a `governor disc rotated by said motor, a lriction pad and centrifugal means tor drawing and holding said governor disc against said pad during the rotation of said motor, of variable speed controlling means actuated by the reproducer to move said friction pad with respect to said governor disc to cause said motor to gradually increase in speed as the reproducer moves toward the center of said record tablet and to cause said motor to gradually decrease in speed as the reproducer moves in the opposite direction, and means to throiv at will said variable speed controlling means out ot' operation and to simultaneously adjust said pad into position tor constant speed record reproduction.

15. In a machine for reproducing sound from a disc sound record tablet in which the record oi sound is in the 'Forni of a spiral `groove in a face thereof, the combination with a reprodueer, a motor for rotating said tablet and a governor mechanism comprising a governor disc rotated hy said motor, a triction pad and centrifugal means for drawing and holding said governor disc against said. pad during the rotation of' said motor, of va riable speed controlling means actuated b v the reproducer to move said friction pad with respect to said Igovernor disc to cause said motor to gradually increase in speed as the roproducer moves toward the center oit said record tablet and to cause said motor to lgradually decrease in speed as the reproducer moves in tho opposite direction, means to throw at will said variable speed controllingr means out oi operation and to simultaneously bringr said pad into position for constant speed record reproduction, and manually operable speed adjusting means to vary the position of said pad with respect to said governor disc to increase or diminish the speed of 'the motor without changing the :uljustment oi. said automatic speed `'arying mechanism or of said constant speed operation whether said motor is operatingI at a constant speed or at a variable speed when said speed adjusting means are op erated.

1l (i. In a talking machine, the combination with a. reproducer, a turntable, a motor for rot-ating said turntable and a `governor conn prising a `governor disc, a friction pad, and centrifugal means for holdingr said disc against said pad to control the speed of said motor, of mechanism to slowly move said pad to gradually vary the speed of said motor for variable speed operation, a mechanism to accurately position and to hold stationary said pad for constant speed operi tion, a conversion member on which opera tive parts ot said mechanisms are mounted, and manually operated means for moving said conversion member to alternately throw said mechanism into operative relation with respect lo said pad and governor disc to convert at will said machine from a constant to a variable speed machine and 'from a vaA riable to a constant speed machine.

li'. ln a talking machine, the combination with a reproducer, a turntable, a motor i'or rotating said turntable and a governor coinprisinga `governor disc, a friction pad, and centrifugal means :tor holding said disc against said pad to control the speed of said motor, oi mechanism to slowly move said pad to gradually vary the speed said motor for variable speed operation, a mechanism to accurately position and to hold stationary said pad 'for constant speed oper tion, a conversion member on which operative parts ot said mechanism are mounted, manually operated means for moving said conversion member to alternately throw said mechanisms into operative relation with respect to said pad and governor disc to convert said machine at will from a constant to a variable speed machine and iroln a variable to a constant `speed machine, and manual means operable independently oi said mechanisms to move said pad with respect; to said disc to vary and adjust the speed oi. said motor. Y

18. In a talking machine, the combination with a motor, a governor therefor, a turntable driven by said motor and a rcproducer, ot a variable speed mechanism controlled by said rcpriiducer and acting on said gever nor to slowly vary the speed. olf said motor as said reproducer travels over a record on said turntable, and conversion means man ually operable to render said variable speed mechanism inoperative and to simultaneously automatically set and hold said governor in a position at which said motor will revolve said turntable at a speed suitable for the reproduction oi sound from constant speed records.

1S). .ln a talking nflachine, the combination with a motor, a governor therefor, a turn table driven by said motor and a reproducer, oi' a variable speed mechanism controlled by said reproduecr and acting on said, governor to slowly ary the speed of said motor as said reproducci.' travels over a record on said turntable, and conversion means manually movable into one position to throw said variable speed mechanism into operative relation to said motor and into another position to render said variable speed mechanism inoperativeand to simultaneously automatically set and hold said governorl in lili a position at which said motor will revolve said t-urntable at a speed suitable for the reproduction of sound from constant speed records..

20. In a.- talking` machine, the combination with a motor, a turntable, a reproducer and a governor including a governor disc and a friction pad operating therewith, of a variable speed mechanism actuated by said reproducer to slowly change the position of said pad as said reproducer moves `over the turntable, and manually operable means for throwing at will said variable speed mechanism into and out of operative relation with respect to said governor, and for simultaneously automatici-illy moving Said pad to, and holding it .stationary in, a position at which said motor will revolve said turntable at the speed required for the reproduction of sound from constant speed records when said variable speed mechanism is out of said operative relation.

21. In a talking machine, the combination with a motor, a turntable, a reproducer and a governor including a governor disc` and a friction pad operating therewith, of a variable speed mechanism actuated by said reproducer to .slowly changethe position of said pad as said reproducer moves over the turntable, manually operable means for throwing at will said variable speed mechanism into and out of operative relation with respect to said governor, and for simultaneously automatically moving said pad to, and holding it stationary in, a position at which said motor will revolve said turntable at the speed required for the reproduction of sound from constant spe-ed records when said variable speed mechanism is out of said operative relation, and means independent or' said manually operable means to adjust the speed of said motor.

22. In a talking machine, the combination with a motor, a governor therefor, a turntable driven by said motor, and a reproducer, of a variable speed mechanism controlled by said reproducer and arranged to act on said governor to slowly vary the .speed of said motor as said reproducer travels over a record on said turntable, and conversion means manually7 movable into two positions, in one of which said variable speed mechanism is rendered operative by said conversion means and in the other of which said variable speed mechanism is rendered inoperative and said governor is automatically set to and held by .said conversion means in a position at which said motor will revolve said turntable at a speed suitable for the reproduction of sound from constant speed records.

In testimony whereof, I have hereunto set my hand this seventeenth day of October, 1924.

HORACE LEOPOLD TUCKER BUCKLE.