US499879A

US499879A - Phonograph

Info

Publication number: US499879A
Authority: US
Publication date: 1893-06-20
Anticipated expiration: 1910-06-20

Description

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- TpA. EDISON.

PHONOGRAPH.

No. 499,879. Patented June 20, 1893.

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PHONOGRAPH. No. 499,879. Patented June 20, 1893.

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(No Model.) 7 Sheets-Sheet a.

T. A. EDISON. PHONOGRAPH.

No. 499,879. Patented June 20, 1893.

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T. A. EDISON.

PHONOGRAPH. No. 499,879. Patented June 20, 1893.

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PHONOGRAPH. No. 499,879.

Patented June 20, 1893-.

(No Model.) 7 Sheets-Sheet 7. T. A. EDISON.

PHONOGRAPH. No. 499,879. Patented June 20, 1893.

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UNITED STATES "PATENT- OFFICE.

THOMAS A. EDISON, OF LLEWELLYN PARK, NEW JERSEY, ASSIGNOR TO THE EDISON PHONOGRAPH COMPANY, OF NEW JERSEY.

PHONOGRAPH.

SPECIFICATION forming part of Letters Patent No. 499,879, dated June 20, 1893.

Application filed July 30, 1888.

To all whom it may concern:

Be it known that I, THOMAS A. EDISON, a citizen of the United States, residing at Llewellyn Park, in the county of Essex and State of New Jersey, have invented a certain new and useful Improvement in Phonographs, (Case No. 792,) of which the following is a specification.

My invention relates to improvements in the mechanism of my phonograph, whereby it is made more convenient and efficient in operation.

The invention consists in the various novel devices and combinations of parts and in the method as fully hereinafter explained and pointed out by the claims.

In the accompanying drawings forming a part hereof,-Figure 1, is a frontelevation of the complete machine with the front of the case broken away to show the driving motor. Fig. 2, is a top view of the complete machine. Fig. 3, is a top view of the phonograph proper on a somewhat larger scale omitting the driving and governing devices. Fig. 4, is a sectional view illustrating the movable center for supporting the outer end of the phonogram cylinder carrying shaft. Fig. 5, is an end view of the phonograph. Fig. 6, is a sectional view showing the traveler arm and connected parts. Fig. 7, is a top view of the driving motor. Fig. 8, is a sectional view of such motor. Fig. 9, is an end elevation of the speed governor. Fig. 10, is an elevation and partial section of the governor taken at right angles to Fig. 9. Fig. 11, is a top view of the contact arm of the governor; and Fig. 12, is a view principally in diagram showing the circuit connections of the electric motor and governor.

A is the frame of the phonograph proper which is mounted upon a box B, which in turn is mounted upon a suitable base 0. The frame A is supported upon one end of the box B so that it overhangs such box to make roomfor a receptacle A which stands upon the base 0 under the overhanging phonograph frame and receives the shavings which are cut from the phonogram cylinder.

Between the phonograph frame A and the 50 box B are placed cushions aof elastic material such as soft rubber, which,'to a desirable serial No. 281,453. (No model.)

extent, prevent the vibrations of the motor contained within the box B from being transferred to the phonograph frame to the injury of the recording or reproduction of the sounds. The frame A is secured to the box B by means of screws b which pass through slotted lugs 12 on the frame A into the top of the box B. Lugs b on the base B rise up on each side of the bottom edge of the frame A so as to hold such frame against lateral displacement. A screw 0 passing through a part of the frame A sets against a ing a on the base B (shown in dotted lines in Fig. 1).

The screw 0 serves to adjust the frame A on the box B for the purpose of tightening the driving belt as will be presently explained, and the lugs b are slotted to permit of this movement, the screws 1) being finally tightened after the proper adjustment of the driv- 7o ing belt has been secured.

D is the shaft of the phonograph, which is arranged horizontally and longitudinally upon the frame A. This shaft is held upon stationary centers so as to turn true and for the purpose of compensating for any wear. At the inner end of the frame A a standard d rises, through which passes the adjustable and removable centering pin (1, which is held by a set screw 01 passing through the top of the standard d. Atthe outer end of the phonograph shaft D the .centering pin e is carried by a swinging arm D. This swinging arm D is pivoted upon a side extension A of the frame A at one end and at'its other end it is 8 removably attached to a side extension A of the fra'me'A by means of a bolt e and a thumb nut 6 This bolt 6 is pivoted on the end of the side extension A of the frame A so as to swing vertically and it enters a slot 0 e in the end of the swinging arm D. By loosening the nut e the bolt e can be swung downwardly out of the slot a when the arm D is free to be swung upon its pivot thus exposing the outer end of the phonograph shaft D, while 5 by'swinging the arm D inwardly, the center e will properly engage with the end of the shaft D and bylifting the bolt 6' and tightening the thumb nut e the arm D will be fastened rigidly against the end of the side extension A of the frame A. To prevent the shaft D from too great a displacement when the arm D is swung outwardly, it passes through a slotted standard 61 which rises from the base A and center (1' by reason of its impingemntagainst 1 the base A.

The center e is a pin which passes through the arm D and is made adjustable by means of a screw f which turns into the arm D and has a flange f on its head which engages with a slot in the side of the pin 6. By turningthe screwfit will be seen that the center pin e will be adjusted and this without turning the center pin; the, turning of the center .pin might be attended with a disturbance of the relative adjustment of theparts.

Upon the shaft D between the standard d? and the swinging arm Dis mounted the phonograrn cylinder F. This is preferably a cylinder havinga slight taper on its external surface, its smaller end being at the outerend of the shaft. The standard 01 is at theend of the top plate of the frame A, the extension of such frame beyond the box B being efiected by the side bars A A The phonogram cylinder F being located between the side bars AA overhangs the frame, leaving a clear space beheath the cylinder through which the cuttings from the blank drop into the receptacle A The tapering cylinder F is adapted to receive a cylindrical phonogram blank F having a tapering bore adapted to fit the surface of the cylinder. By swinging the arm D outwardly, the phonogram blank F can be removed from the cylinder or placed upon it. To stiffen the side bars A A of the frame and to prevent a vibrating or tuning fork action, which would injure the record, such side bars are connected by a cross bar A at ther outer ends, such cross bar A curving downwardly out/of the way so as not to interfere with the manipul a-- tions of the blanks.

G is a stationary rod which is mounted in standards on the frame A and its side bar A in rear of and parallel with theshaft D. Upon the rod G is a sleeve G, which is adapted to slide and turn freely upon such rod, and

which is of less lengththan the rod, so that its longitudinal movement thereon will be equal'at least to the length of the phonogram cylinder F. Secured to the outer end of the sleeve G is the rocking holdingarm H which is rigidly fixed to said sleeve and projects up.- wardly and forward over the top of the phonograni cylinder. On its upper end the rocking holding arm H carries the swinging spectacle frame H, which is pivoted to said rocking holding arm-so as to swing laterally across it. A spring pin 9 having. a beveled end enters bevel slots 9 in the hub of the spectacle frame so as to hold the spectacle frame by spring pressure at either limit of its swinging movement. The eyes of the spectacle frame carry the recorder H and the reproducer H which are brought alternately into operative relation with the surface of the phonogram blank by the swinging of the spectacle frame.

The head of the rocking holding arm 11 is provided with laterally extending arms 9 g through which pass set scrcws g 9 These set screws bear against the spectacle frame when it is swungin one direction or the other, so as to adj ustthe spectacle frame to bring the recorder or reproducer into the desired relation with the surface of the blank. The

screw 9 eflfects this adjustment for the rethis is to enable the production-of a double 7 record upon the same blank and in parallel spiral lines.

It is evident that if the recording point be made narrow relative to the feeding movement, the space between the spiral lines of record may be as wide or wider than the track of the record itself. If such is the case the unoccupied space between the lines of record may be utilized for producingasecond record. f The screw g enables the operator to adjust .the recording point so as to track in this "space between the lines of the first record, and the screw g enables the operator to ad- ';just the reprodncer so that it will track on either record. @frame are provided with fingers 72. through 5 which pass the adjusting screws 72. which frost upon the guide rest I, which is secured to the side barA of the framein front of the phonogram cylinderand parallel with its axis. ;'lhe.bearing of the adjusting screw h upon {the straight guide rest I causes the recorder or reproducer to advance in a straight line along the surface of the blank. The ends of Zthe adjusting screws 71. which bear upon the guide rest I are enlarged so as to overlap said The eyes of the spectacle guide rest for a purpose which will be presently explained.

Upon the inner end of the sleeve G is mounted the traveler arm I, which is adapt- ,ed to turn freely on the sleeve G. traveler arm projects forward over the shaft D between the standard d and thepulley E This and has asection of a nut h? attached removably to its lower edge and engaging with a fine screw thread h which is cut uponthe shaft D between the standard d and the pulley E. The nut section 72, is removalbly secured to the traveler arm I by means of screws as shown, sothat it can be readily replaced when worn out; it is alsomade removable so that it can be made of steel and have a finely cut screw surface. The traveler arm itself may be of cast iron. The traveler arm projects over the shaft D and in front of it, and at its forward end is provided with a downwardly projecting finger't' having its lower end 'i' turned upwardly to form a hook, the end of which hook terminates in a knife edge which engages the under side of a screw shaft i mounted in standards on the top plate of the frame A in front of and parallel with the screw cut section of the shaft D. The shaft 2' is provided with a screw thread i which is coarser than the screw thread 71 The function of the screw thread 2' is to move the traveler arm back with a speed which is greater than the forward movement which is given such traveler arm by the screw thread If. This screw thread 2' is a ratchet thread so as to engage efiectively with the hook end of the finger i and to move the traveler arm backwardly without causing a friction which would result from a tendency to force the point '6 out of the thread were such screw thread beveled equally in opposite directions. The shaft 1 is driven from the shaft D by means of a belt 2' which passes over small pulleys on both shafts. A lugjon the sleeve G engages with a lug j on the hub of the traveler arm I, when the sleeve G is turned back to the limit of its turning movement; This limit is determined by a fingerj on the rocking holding arm, which strikes the edge of the base A or the side bar A whenthe spectacle frame is thrown backwardly over the center so that it will maintain itself in the elevated position. The lug j does not strike the lugj' until the limit of movement is nearly reached so that the efiect will be to just lift the traveler nut 72 out of engagement with the screw thread if without engaging the point 'i' of the finger 't' with the reversing thread 01 Before this limit of the lifting movement of the spectacle frame is reached such movement does not affect the traveler arm. In front of the guide rest I and the reversing shaft 1 and extending the entire length of the frame A and theside bar A isa turning guide bar J. This turning guide bar is pivoted in lugs j projecting from the frame, it being held eccentrically by centers j passing through the lugs 7' and engaging with the outer edge of the bar J at its ends. The inner edge 7' of the bar J is made as a straight edge, and the enlarged ends of the adjusting screws h project over this straight edge j, and likewise a projection f on the finger '6 attached to the end of the traveler arm 1 projects over this edge 3' To one end of the bar J are secured two fingers k 7t between which plays a cam 70 secured to the end of a turning stud 70 having a thumb piece on its end. A spring 75 throws the finger is down against the cam k throwing the straight edge 7' downward. The function of the cam k is to turn the bar J against the tension of the spring k and to lift the edgej against the tension of the spring. For this purpose the cam 70 is provided with two risers 70 k, the rise being less than the rise 716 Now by turning the cam 10 with the fingers the effect will be to turn the bar J and to lift the edge 7' by two successive movements. The effect of the first movement, that produced by the rise of the cam, is to lift the spectacle frame so that the recorder or reproducer will be disengaged from the surface of the blank and to lift the traveler nut 71, out of the feeding screw 72 so that the further feeding of the spectacle frame will be stopped. The clearance between the edge j and the shoulderj is slightly greater than that between the edge j and the adjusting screw h so that the recorder or reproducer will be first disengaged from the surface of the blank before the traveler nut is disengaged from its feed screw in order to prevent injury to the blank or the record on it. The effect of the second step of the movement, that produced by the rise k of the cam, is to simultaneously raise the spectacle frame and traveler arm to a farther extent and to throw the point z" of the finger 1' into engagement with the reversing screw thread 2' This reverses the movement of the spectacle frame so that in reproducing the matter can be repeated to any extent desired. An arm m may be attached to the turning bar J and be connected by a cord or wire with a treadle J so that the move- .ments of the bar J may be produced by the 'recorder or the reproducer with relation to the surface of the phonogram blank can be determined. An adjustable knife L is pivoted to the rocking holding arm H for the purpose of turning olf the surface of the blank. The swinging arm D is provided with a projecting flange m projectinginwardly around the center pin e and entering the end of the phonogram cylinder F, so as to act asaguard to the center pin, preventingthe material which is cut from the blank from entering the space around the center and gumming up the bearing. A guard plate W1 is attached to the side bar A in rear of the phonogram cylinderso as to guide the shavings cut from the blank into the receptacle A Such shavings by reason of the movement given them by the turning of the cylinder, tend to pass over the extension A of the frame; they are inter cepted by the guard plate m For driving the phonograph I prefer to employ an electric motor. This is inclosed in the box B, the armature M of the motor being mounted on a vertical shaft M, which passes through the top plate of the box B above which it is provided with a pulley 'n. An endless belt at passes around this pulley n and passes under two guide pulleys 91*, 02 which are held by centers in the frame A near the lower edge of the pulley E. The horizontal shaft D of the phonograph is thus driven from the vertical shaft M of the motor through an endless belt, whose direction is changed from ahorizontal to a verticalplane by means of the guide pulleys 71 ,775. This belt connection between'the motor and phonograph shaft: is preferable to gearing since theslight mechanical vibrations-of the motor are not transferred" thereby to the phonograph. It will beseen that byadjusting the set screw 0 any tension desired caube given to the belt n. The-form of electric motor employed isa multipolar motor, it having four field magnet poles 0 o 0 0 These poles project upwardly from a four armedplate M The armature M revolves above the plate M the armsof the plate M being wound with the field magnet wire. The plate M issupport ed from'the'bottom of the box Bby suitable legs 0 and is steadied from the top plate of the box B by studs 0 The vertical shaft M of thcmotor is stepped in the center of theplate M A hole is cut through the center of the plate M and into-this hole is introduced from the under side of the plateM ablock p of metal carrying in its upper end a fiat agate p. The plug step 19 is made adjustable by means of a. screw p entering the bottom of the plate Mzand bearingat one side of' its head onthe plug p, so that by turning this screwthe plug p can be adjusted. The lower end of the shaft M is brought "to a rounded point where it'rests on the agate p, the shaft above-the agate being surrounded by a bushing 19 of. brass or other suitablematerial; the shaft at its upper end is held. by acenter pin 19 The commutator brushes of the motor are shown at NN.

step bearing of the motor shaft. The armature of the motor is a Grammering which is securedtoa hub on the shaft. by means of ity with a relativelylow axlespeed. The motor employed, being an electro-dynamic motor, has a high. degree of efliciency, which efficiency is increased by the fact that it is a multipolarmotor, since the magnetism has a shorter distance to travel through the iron of the armature anda more intense field is produced. With the fly wheel form of armature it would not be possible. to get as intense a field or one as uniform with a field magnet having but two poles. I'have also found that by using a motor with avertical shaft a great reduction can be made in the power of the drivingbattery over what would berequired by a motor mounted on ahorizontal shaft.

The motor being nicely balanced pnits jewel step seems torequire very little power to drive it and does not-produce troublesome vibrations in the phonograph.

An oil tube N extends from the top plate of thebox B down to the To control the speed of thcmotor and make it uniform, I provide-a governor. ernor has'a shaft P which-is driven by an endless belt q from a pull'eyon the motor shaft. Centrifugal balls P" P are secured to springs g g whichare attached at their upper ends to the shaft P and at theirlower: ends hold a plate P which surrounds the shaft P and is raised and lowered by the centrifugal balls .at its upper end 'bya center ping: The

movement of the plate P by the governor balls-serves to make and break circuit be- ?tween two springer rwhich are heldbya ipivoted lever Q whichis adjustabl'eby'means of a screw Q passingthrough arsuitable support with which itsscrewthread engages and also passing through the end of the lever'Q below which it is provided" witha nut and *above which it has a spring We prevent any jlost motion at the connection between= the screwQ and the lever Q; It" will be seen that by adjusting the elevationof the lever Qthe Epoint at which the plate P will, touch both 5 the springs 'r T will be varied, and since this :point is the point at which the speed of the imotor is-checked, it will be seen that the-mo-- .tor can be varied in itsspeed; which it is defsirable to do in reproducing the soundsfrom Ephonogram blanks, since the speed at whi'clr thesound record was madewill be indicated upon the blank and the machine-canbe set Thehead Q of thescrew Q" for that speed. is provided with a suitable index as shown,

justment of the governor can be determined.

R is an electro-magnet whosoarmature R breaks circuit at its back point r,tl1e-armature being retracted-bya spring 7'.

the governor are illustrated in Fig. 12, in which I, 2, represent the wires fromthe battery or other source of electrical energy leading to the binding-posts 3, 4, which are located-upon the box B. From the bindingpost 4, a wire gfrom thence to the plate 6 of a plug switch. From the binding post' i also extendsawire "7 connected to thebase of the magnet R and hence to its armature R L From the'insulated back point r of themagnet' a wire 8 extends to the armature M'ofthe motor andfrom thence to the plate 6 of the plug switch; also extending from the binding post 4 is a wire 9 wire is broken.

which includes the coils of' the magnet R and thence. extends to the. spring r at which the Thewire 9 iscontinued however from the springr to the plate 6 of the It will be seen that the armature of the motor,- its field magnet and'the governor magnetRare by means of which andthe pointer r the ad? The electric connections-of the motor and 5 passes to the field magnet ofthe motor and" This gov- Theshaft Pisa vertical shaftstepped i at its lower end ou the flat aga'teq and held.

in three separate multiple arc circuits from the battery. The circuit of the field magnet is I never opened except at the plug-switch, which opens all of the circuits at once. The circuit of the armature however of the motor is opened whenever the magnet R moves its ar mature R off of the back point W. The magnet R is wound to a high resistanceand is extremely sensitive in its action, so that the instant the circuit to this'magnet is closed by the plate P touching the springs r 'r, the magnet will act and will open the circuit of the armature. This makes a much more sensitive governing device than if it were attempted to control the circuit of the armature by means of the governor directly. The field magnet circuit of the motor not being opened by the governor the spark which would be caused by the discharge of the field magnets will not be present.

What I claim as my invention is 1. In a phonograph, the combination with the phonogram cylinder and its carrying shaft, of centers upon which said shaft turns and a swinging arm upon which one of said centers is mounted, substantially as set forth.

2. In a phonograph, the combination with the phonogram cylinder and its carrying shaft, of centers on which the said shaft turns, a swinging arm carrying one of said centers and a standard through which such shaft passes loosely for preventing displacementof the shaft when the centeris swung away from its end, substantially as set forth 3. In a phonograph, the combination with the phonogram cylinder and its carrying shaft, of centers on which said shaft turns, a swingingarm carrying one-0f said centers and the driving pulley on the shaft extending below the top of the frame so as to look the shaft against longitudinal displacement,substantially as set forth.

4. In,,.a phonograph, the combination with the cylinder shaft, of the cylinder mounted on one end of said shaft, centers onwhich the shaft turns and a swinging arm carrying the center at the cylinder end of the shaft whereby the end of the cylinder can be exposed for receiving or removing the phonogram blank, substantially as set forth.

5. In a phonograph, the combination with the supporting frame, of a shaft overhanging the frame, the phonogram cylinder placed on the overhanging portion of the shaft and a removable bearing for this overhanging end of the shaft, substantially as set forth.

6. In a phonograph, the combination with the supporting frame, of the cylinder shaft mounted upon such frame and overhanging the same at one end, the phonogram cylinder mounted on the overhanging end of the shaft, side bars extending from the frame out to the end of the shaft and a movable arm connecting such side bars and carrying the outer bearing of the shaft, substantially as set forth.

7. In a phonograph, the combination with the frame A, having side bars A A and the phonogram cylinder and shaft, of the swinging arm D carrying the center for the outer end of the shaft and pivoted upon one of said side bars and locked to the other side bar by the swinging bolt 6' and nut e ,substantially as set forth.

8. In a phonograph, the combination with the frame A having side bars A A and the phonogram cylinder and shaft, of the swinging arm Dcarrying the center for the outer end of the shaft and the bar A connecting the side bars of the frame, substantially as set forth.

9. In a phonograph, the combination with the rocking holding arm and the traveler arm, of a movable bar acting upon both of such arms and lifting them together, substantially as set forth.

10. In a phonograph, the combination with the rocking holding arm and the traveler arm, of a bar having a straight edge extending beneath both of such arms and pivoted so as to be capable of a turning movement, whereby it .Will lift'said arms together, substantially as set forth.

11. In a phonograph, the combination with the rocking holding arm and the traveler arm, of the pivoted lifting barextending under both the rocking holding arm and the traveler arm and a cam for turning said lifting bar, substantially as set forth. I

12. In a phonograph, the combination with the rocking holding arm and the traveler arm, of the feeding and reversing screws, the turning lifting bar and the cam having two rises for giving such lifting bar two successive movements, substantially as set forth.

13. In a phonograph,the combination with the rockingholding arm and the traveler arm, of the stud for lifting the traveler arm when the rocking holding arm has reached thelimit of its lifting movement, substantially as set forth.

14. In a phonograph, the combination with the supporting rod and the sleeve sliding and turning thereon, of the rocking holding arm secured to said sleeve, the traveler arm turning upon such sleeve, a stop for determining the limit of the lifting movement of the rocking holding arm and studs'for lifting the traveler arm when the rocking holding arm has reached the limit of its lifting movement, substantially as set forth.

15. In a phonograph, the combination with the rocking holding arm and the traveler arm, of the turning lifting bar acting upon both of said arms and the foot treadle connected with said turning lifting bar for operating it, substantialiy as set forth.

16. The method of producing more than one record on the same phonogram blank consisting of first making one record thereon and then adjusting the recording point to an intermediate position between the adjacent spiral lines of the preceding record and making an additional record, whereby without increasing the fineness of the feeding screw more matter can be recorded upon a phono- IIO gram blank of given length, substantially as set forth.

17. In a phonograph, the combination with the rocking holding arm,,of the guide rest and the adjustment upon such guide rest having a bearing overlapping the guide rest and a turning lifting bar beneath the overlapping bearing, substantially as set forth.

18. In a phonograph, the combination with the phonogram cylinder and shaft, of the swinging arm carrying the center for the cylinder end of the shaft and the wax guard surrounding such center and entering the end of the cylinder, substantially as set forth.

19. In a phonograph, the combination with the phonogram cylinder and the turning oif knife or tool, of the wax guard in rear of such. cylinder for directing the shavings into areceptaclebeneath the cylinder, substantially as set forth.

20. In a phonograph, the combination with the horizontal main shaft, the phonogram blank carrier'revolved thereby, and the re-1 cording and reproducing devices, of an electric motor mounted upon a vertical shaft, and a belt connection between the motor shaft. and the phonograph shaft, substantially as 3 set forth.

21. In a phonograph, the combination with 3 the phonograph shaft, the phonogram blank carrier revolved thereby, and the recording and reproducing devices, of an electric motor connected with said shaft for driving the same, the armature and the field magnetof said motor being connected in multiple arc,

and a speed governor controlling the armature circuit, substantially as set forth.

22. In a phonograph, the combination with j the phonograph shaft, the phonogram blank carrier revolved thereby, and the recording:

and reproducing devices, of an electric motor connected with said shaft for driving the f same, and having its armature and its field magnet in separate multiple arc circuits, a magnet controlling the armature circuit, and a centrifugal governor controlling the said magnet, substantially as set forth.

23. In a phonograph, the combination with the phonograph shaft, the phonogram blank carrier revolved thereby, and the recording and reproducing devices, of an electric motor connected with said shaft for d riving the same,

a speed governor controlling the speed of said motor by opening the circuit thereof when a' predetermined speedhas been obtained, and an adjusting screw for varying the point at which the governor will aifect the circuit, substantially as set forth.

24. In a phonograph, the combination with the phonograph shaft, the phonogram blank carrier revolvedthereby, and the recording and reproducing devices, of an electric motor con nected withsaid shaft for driving the same,

a centrifugal governor controlling such motor by closing circuit at contacts and an adj ustment for varying the position of such conmounted upon an adjustably pivoted lever at 1 which the magnet circuit is broken and a centrifugal governor moving a disk which closes the magnet circuit-at such contacts, substantially asset forth.

26. In a phonograph,thecombinatiou with the frame supporting the phonograph shaft, the phonogram blank carrier, and the recording and reproducing devices, of an electric motor mounted upon abase and connected by a belt with the phonograph shaft,.and means for adjusting the phonograph frame to tighten said belt, substantially as set forth.

27. In a phonograph, the combination with the phonograph proper in which are combined a phonograph shaft, a phonogram blank carrier revolved thereby, and recordingand reproducing devices, the same being mounted upon a separate frame, of a base carrying a motor connected with the said shaft for driving the same, and cushions of elastic material between said base and the phonograph frame, substantially as set forth.

28. In a phonograph, the combination with the frame of the phonograph proper, of the base carrying a motor connected by a belt with the phonograph shaft, guiding lugsupon the base, slotted lugs and screws for securing the phonograph frame to the base and an adjusting screw for adjusting the phonograph frame upon the base for the purpose of tightening the belt, substantially as setforth.

29. In a phonograph,the combination with the feed screw and the traveler arm, of the nut section secured'rigidly but removably to said traveler armand engaging with said feed screw, substantially as set forth.

This specification signed and witnessed this 27th day of July, 1888.

Tnos. A. nelson.

Witnesses:

' RIoHD. N. DYER,

WILLIAM PELZER.