US1048137A - Polishing-machine. - Google Patents

Description

.0.'L. DOSGH.

POLISHING momma. Arrmonmn FILED APR.29-,'1909. I Patented Dec. 24, 1912.

(SHEETS-SHEET 1.

H WITNESSES INVENTOR ATTORNEY 4 SHEBTS-SHEET 2 0. L. BOSCH.

POLISHING MACHINE. I APPLICATION FILED 10211.29. 1909.

Patented Dec.24,1-91

IVESSES': I

' WIT Patented. Dec. 24, 1912.

55 lA/I/ENTOR Mmsssrs;

ATTORNEY 0. L. nosoH. POLISHINGMAUHINE.

APPLICATION FILED APR.29, 1909.

Patented Dec. 24,' 1912.

4 SHEETS-SHEET 4.

I ml

i l l all";

- 'lm/Ervrol? 40 t times into contact UNITED strar as PATENT OFFICE.

OLIVER L. boson, or ELIZABETH, NEW JERSEY, ASSIGNOR TO THE smsnn MANUFAC- roams COMPANY, A CORPORATION or NEW. JERSEY. f

' romsnmc-macninnf Application filed April 29, '1909. Serial No. 492,929.

To all whom it may concern: 7

Be it"known that I, OLIVER-L. DoscH, a citizen of the United States, residing at Elizabeth, in the 'county of Union and State of New Jersey, have invented certain new and useful Improvements in Polishing- Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has for its object to provide a polishingmachine adapted for rap- .idly and effectively producing a smoothed polished surface upon various metallic obporting pulleys connected byca belt serving as a backing over which is applied a second belt provided upon its exposed face with abradmg material such as emery, the article to be polished being pressed against the abrading belt in undergoing the polishing operation.

In its preferred form, the present improvement includes a vgyratonv work-supporting arm provided with a carrier for holding the work, such arm being'pivotally mounted upon the machine frame in such manner as to maintain the work by gravity pressed against the abrading belt, the gymtory movements of the work-supporting arm causing the work to be moved to-and-fro across the abrading belt transversely of its direction of movement, whereby the entire movement.

surface of said belt is brought at different ished. Special means are provided for oscillating the work-supporting arm so as to subject to the action of the abrading belt the outer half of the rounded balance-wheel pulley rim to be polished, and the-said arm is mo inted upon a la'terallysliding carriage provided with suitable actuating means, whereby across the operative face of the .abradiug beltin addition to its described oscillatory Th work-supporting arm is Specification of Letters Patent:

with the object to be pol;

which is journaled the the work is caused to travel bodily Patented Dec. 24., 1912,

provided with a special form of work-holder with means for turning its work-engaging member inthe opposite direction from the travel of the abrading belt, the axis of rotation of the work being inclined to the direc tion of movement of the abradingi belt whereby the smoothness, of the'cut or abrasion is increased. v

In the accompanying drawings, Figure'fl is a partial end elevation of a polishing mach 1ne embodying the present improvements, Fig. '2 a partial front elevation and Fig.3 a partial plan view of the same.

Fig. 4 is an elevation, partly in section, (if the driving inechanism of the machine and Fig, 5 a

transverse sectional elevation of the gearing and the casing inclosmg the same. Fig. 6' 1s a detached sectional v1ew of the-means for maintaining the work suppo-rting arm retracted from operative position for introduction and removal of the work. Fig. 7 is a detached side elevation of one of the adjustable bearings' of the upper supporting pulley for the backing and abrading belts.

Fig. 8 is a side view showing the manner of mounting the-adjustable bearing of'the rears wardpulley for the abrading belt. Figs. 9, 10, 11 and I2 are detached views representing difi'erentparts of the transverse feedingmechanism for the work-supporting arm. Fig. 13 is an enlarged sectional plan v1ew of the work-holding device carried by the work-supporting 'arm, and" Fig. 14 a detached side elevation of the work-retaininmember thereof. I

Themachine is shown constructed with a frame comprising the base 1, ,a-rearwardly extending member 2 and a standard 3 rising from the base and surmount-edby the head or cross-beam At the front of the standard '3 are disposed the fixed bearingsfi in driven shaft ,6, and the adjustable bearing blocks 7 in which is journaled the parallel shaft 8. As represented in I. Fig. 7, each bearing block 7 is supported at opposite ends upon each of its.

four faces by the point-"of one ofthe adjusting screws 9 of two parallel series which are tapped through the walls of the housing to receivethe block 7 and v the slide-plate 1'1 fitted the front face block 10 aperturcd itself formed upon to a suitable slide-way upon of the standard 3 and provided with a projecting boss 12 having ail-internally threaded aperture entered by the adjusting screw 13 swiveled in the lug 14 which is bolted to the front of the standard 3. As will be readily observed, the turning of-the adjusting screw 13 will cause the raising or loweringof the slide-plate 11, and hence of the bearing 7. which is adjustable both vertically and sidewise by means of the adjusting screws 9.

The bifurcated member 2 of the frame is provided with parallel seats 15 to which are fitted the side-plates 16, each being formed with a housing block 17 embracing the bearing block 18 adjustably supported therein at opposite ends, similarly to the bearing block '7 befd're described, upon the points of the screws 19 of two parallel series and affording a bearing for the rearward pulley shaft 20. The slide-plates 16 are each provided with a longitudinal boss 21 entered by a uide-rod 22" extendin from a hub 23 b D vformed upon the standard 3, between which hub and the bottom of a longitudinal socket in the boss 21 is interposed a spring :24 acting to yieldingly press the slide-plate 16, and with it the shaft 20, rearwardly from the shafts 6 and 8. As will be observed, the shaft 20 can be accurately alined by adjustment of the two bearing blocks 18 carried by the two slide-plates 16, by means of the adjusting screws 19.

As indicated in the drawings, the machine forming the subject of this application is substantially duplex, the work-holding and polishing members being duplicated, and a description of one of the duplicated groups of mechanisms will therefore be suflicient.

Upon the outer ends of the lower or driving shaft 6 are disposed the driving pulleys 25, the upper shafts 8 having secured thereon the supporting pulleys 26. These pulleys are embraced by the vertically arranged backing belts 27 which may be of leather or of any other usual or suitable material. Encircling each of the belts 27 with their supporting pulleys 25 and 26, and embracing also the rearward idler pulley 2S fixed upon the rearward shaft 20. is the abrading belt 29, which is in practice composed of emery cloth, or of leather or of other fibrous material having upon its outer face emery or other suitable abrading material. As will be observed by reference to Fig. 1, each belt 29 is in contact with its respective backing belt 27 only at the front of the machine and around portions of the supportpressed idler pulley 28 which maintains it taut independently of the belt 27, under the action of the springs 24.

As represented in Fig. 2, the shaft 6 carries, intermediate the bearings 5 and between the spaced upright members 3 of the frame, the pulley 30 which serves to transmit to the driving pulleys 25 their operative movements through the belt 31 extending upwardly with one member passing through the a erture 31 in the cross-beam 4, to the line-s iafting or other source of power.

The cross-beam 4 is provided with the forwardly projecting spaced bearing bosses 32 within which is journaled the oscillating sectional rock-shaft composed of the members 33 33*, each of the independent sections of which is provided adjacent the intermediate central bearing member 32 with .ihe fixed thrust-collar 34 and adjacent its other bearing member 32 with the thrust-collar to prevent endwise movement of the shaft section. These rock-shaft sections are provided upon their opposite ends each with a transverse aperture in which is secured by means of the set-screw 35 the endwise adjustable cross-bar 36 provided upon opposite ends with spherical counter-balance weights 3'7.

Mounted upon the shaft 33 are the sleeves 38 which are formed with openings 39 in the frontside intermediate the end portions, whichlatter are fitted upon the shaft so as to slide thereon; Each sleeve 38 isprovided intermediate its ends with a forwardly pro-- jecting horizontally bifurcated bearing boss 40 embracing a pinion 41 fixed upon a vertical rock-shaft 42 journaled in said bearing boss and meshing with a series of rack-teeth 43 cut in the partially flatted forward side of the r0ck-shaft 33.

The work-support comprises a depending arm 44 having at its upper end a yoke with spaced laterally extending members 45 embracing the bearing boss 40 and rigidly attached to the opposite ends of the shaft 42 by means of the transverse pins 46. The members 45 of the yoke are disposed substantially in the plane of the rock-shaft- 42, 'butthe depending work-supporting arm 44 is arranged at a slight inclination with said yoke and rock-shaft as indicated in Fig. 2. The rock-shaft 42 thus affords an axis disposed longitudinally of but offset from the work-supporting arm 44 upon which the latter is caused .to oscillate by engagement of the rack teeth 43 with 'the pinion 41. v

The arm 44 is' formed at its lower end with a laterally extending bracket 4?, and is provided near the adjacent end of said bracket with an aperture through which extends the hollow transverse shaft'4S upon which is fixed the crank-arm 49 carrying the outwardly extending crank-pin 50. The

shaft 48 is shown formed in its outer end with a slight enlargement to receive the hub i a of a sewing machine balance wheel with rim 6 connected with the belt-wheel afforded by the flanged and peripherally grooved hub portion 0 by means of the spokes (Z between .sleeve- 52 is provided with alongitudinal slot '5 .havinga transverse portionv '56 inclmed t nearly arightangle to the'portion 55 and extending in the direct-ion of rotat-ion of the shaft 48, Which-slot is entered by the reduced end portion 'of a locking screw 57 tapped into the hub '51 of the bracket- 47.

- The sleeve 52, which constitutes the dead spindle of the work-holder, is provided with a knob. 58 by which it may be turned and moved endwise into and out offcontact withthe work; and itis fitted with a plug 59, secured adjustably therein by means of set-scre'ws 60' to adjust-theposition' of the thimble 53 longitudinally in'relation to the shaft or live spindle 48. .The forward portion of the shaft 48 is formed in one sidewith a longitudinal slot 61 to receive the laterally extending'finger 62- of the push-pin 63 extending through the hollow shaft 48 and providedat its opposite end with the knob 64 The finger 62 is nor mally housed within. a recess in the outer end of the crank-arm 49, but in order to eject the balance-wheel at the completion of a polishing operation, the rod 63 is thrust forward by pressureof the hand upon the knob 64, which causes the-finger -62 to engage the inner end of the balancewheel hub and force the same offtheend of the shaft 48f; the knob 58 having previously been turned to disengage the stop-screw 57 from the transverse portion 56 of the slot 55 and the sleeve 52 then withdrawn'to release the work.

As will be observed, the work-supporting arm ,44 is pivotally mounted by means of the yoke and sleeve 38 upon the rock-shaft 33, which is disposed above theforward portion of the belt-pulley 26, and the rim of the bal-' ance-wheel isthus maintained by gravity in contact with the'oute'r abrasive face of the polishing belt, resting'a gainst the same intermediateand opposed to the idler pulleys 65 and 66 mounted upon suitable brackets 67 and 68, respectively, attached to the front of the standard 3. f l y As will be seen by reference to Fig. 2, the facesof the pulleys 65 and 66 are narrower than hose of the belt supporting pulleys 25 and 26, and they arearranged' uponzoppo site sides of the-polishing point iii-relation to the direction of movement of the polishing belt, and at the opposite sides of "said belt causes the latter to conform to the pebelt in relation to the width of the latter, so

as tolie in an-oblique arrangement. By this a yielding abrading surface intermediate the upper idler pulley 65 and the-lower supporting pulley 25,- and in the other half of said means, in one half of the travel of the work acrossthe polishing belt, thelatter presents travel a 'similarly'yielding abrading surface is presented by the belt extending from the] loweridler pulley 6.6 to the'upper supportng pulley 26. It will thus be seen thatthe side-thrust of the work upon the polishing belt is sustained almost entirely by these idler pulleys, andvthatfits pressure upon the.

riphery of the circular object (such as a sewing machine balance wheel) to insure a much largerarc ofcontact than would be afforded without the use of these idler pulleys.- It will be observed that the sleeves 38 constitute reciprocating and rocking carriers for the work-holders which are movable upon supporting fulcra afforded, in the present embodiment of the improvement, by the rock-shaft sections 33"and 33*; and it is e'vident that ,-the form of such carriers is not confined to that shown and described herein, so long as they perform the functions ascribed to them herein. I

For convenient introduction and removal of the work, the work-supporting arm 44 is :provided with a lateral handle 69 by means of which it is drawn forwardly, which causes the sleeve 38' and its supporting shaft 33 to be oscillated suflicientlyto permit the shoul' der 70 of the detent lere1w71, pivoted at'72 upon a bracket 73 bolted to the member 4,

to-enga-ge the tooth 74. of the collar 75 fixed to said shaft, whereby the arm 44 is maintained in retracted position until the detent lever 71 is lifted by its handle 76, when the arm 44 is again permitted to gravitate to its operative position. As shown in the drawings, one side of the tooth 74 is inclinedin relation to the detaining shoulder'engag'ing theshoulder 70 of the lever 71, whereby the detaining leveris'adapted to rest normally upon said tooth when the arm 44 is in operative position; but when the work-supporting arm is retracted, and its supporting sleeve '38 rocked with the oscillatory rack-bar 33,

the collar 75 is turned sufficiently to permit the shoulder 70 of the lever 71 to drop behind the abrupt shoulder of the detaining tooth 74, whereby the parts are retained in retracted.v positionuntil the lever is raised to release the tooth 74 as previously described.

As indicated in the drawings, and more particularly-in Figs; and 13, upon the end ofthe' shaft 48 opposite that upon which the work is support-ed is secured by means :of the splinev 77 the-bevel-wheel 78*whosehub 795s jo-u'rnaled in the base of the arm a'nd'meshing with this bevel-wheel is asirni-lar -g'ea'r 80 fixed" updh the lower end of an actuating shaft 81 extending through the hollow arm 44: and j ournaled in suitable bearings provided at opposite ends thereof, this shaft being driven by means which will later be described to turn the work-holding shaft 48, and hence the object to be polished,

in'a direction opposite to that of the polishing belt 29.

Fixed upon the horizontally disposedcam-shaft 82 which is mounted in suitable bearings 83 rising from the cross-beam 4 is the feed cam-cylinder 8i provided with the substantially heart-shaped cam-groove 85 which is entered by a roller-stud 86 carried by the collar 87 secured by means of the pin 88 upon the reciprocatlng bar 89 slidingly supported upon the cross-beam 4 parallel with the feed-cam shaft 82 and the 1'0ck-shaft33. As represented in Figs. 3, 11 and 12, the reciprocating bar 89 is provided upon opposite sides of the collar 87 with laterally disposed longitudinal angular grooves 90 each of which is entered by a roller-stud 91 carried by a screw 92tapped into the forward end of the bearing member 83. As the angular slots 90 are arranged respectively above and below the center of the rod 89, it will be observed that the roller-studs 91 serve to prevent the turning of the same in either direction, while permitting its free endwise movement.

F ixed L djustably uponthe opposite end portions of the bar 89 by means of setscrews 93 are tubular sleeves 94 each provided in its lower side with a transverse notch adapted to be entered by the rearwardly profecting lug 96 upon one of the sliding sleeves 38, said lug,being formed with a notch 97 conforming in curvature with the surface of the reciprocating bar 89, and being substantially of the width of the notch 95 in the sleeve 91in As will be observed the opposite ends of the slot 95 in the sleeve 94; constitute coupling shoulders which are normally engaged by the shoulders afforded by the opposite ends of the lug 96 extending from the sleeve 38. the members of the coupling so con tituted being disei'igaggcd by the rocking of the sleeve in the withdrawal of the vvork-siupporting arm 4-!- irom operative relation with ,the abrading n'ir-mlcr afforded by the polishing belt 29. It is evid it that any other suitable device may be employed for detachably connecting the oscillatory and reciprocating sleeve 8 with the ting teed-cam St 85.

Fixed upon one of the cam-shaft 8:? is

i ll

:1 bevel-wheel 98 witx'l which meshes the similar bevel-vend. at the vm cated .by means of the notched sleeves 94 and lugs 96 upon the sleeves 38 to impart similar 'movements to said seeves, which causes the work-supporting arms at to be carried bodily crosswise of the direction of movement of the abrading belt 29; while the engagement of the pinions 41 with the racks 43 cut in the sides'of the rock-shaft 33 induces a simultaneous oscillatory movement of said worlcslipporting arms, which serves to turn thework-holding bracket-ar'n t? around the rock-shaft 42 as an axis, so as to progressively present to the operative face of the belt 29 the exposed semi-ciroular surface of the balance-v, heel rim 5 for the polishing operation.

weighted counter-balance rods 36 may be shifted endwise in one or the other direction so as to adjust-the pressure of the article to be polished upon the abrading belt, this being accomplished through the root-shaft and the depending arm 44, which is locked from turning upon the same by the engagement of the pinions 41 with the rack members 43. 4

While both the abrading belts 29 may be provided with operative faces of the same degree of coarseness, in practice they are sometimes made of different character, so that one may be employed as a roughing member and the other as a finishing member, for successive use upon each object to be polished. By forming the rock-shaft for. sustaining the work-supporting arms in independent sections, it will be observed that the work-holders may be retracted and returned to operative position alternately, in order to prevent the vloss of time. of having one portion of the machine idle while the work is being introduced or withdrawn from the other portion.

hen one of the work-supporting arms 44 is retracted, it is obvicus that the lug 96 is disengaged from its slot 95 in the reciprocating sleeve 94:. and the bodily and oscillating movements of the worloholder'are suspended. After the renewal of work in the work-holder. the raising of the detentlever permits the arm 44 to gravitate toward the abrading belt '29, until the lug 96 rests upon the exterior of its propelling sleeve 94. in which position it remains to maintain the work still out of contact with the abrading member until the notch 95 comes into register with said lug, when the latter enters the notch and permits the rocictuating the backing and abrading belts is As will be readily o bserved, by loosening the set-screws 35, thederived from the driving shaft by means of the pulley 30 connected by the belt 31 with: an overhead pulley of suitable line shaftin'g; and the movements of the work in relation to the abrading belt' are derived from an overhead counter-shaft'102 mountwhich it derives its rotary movements, and

' it has fixed thereonthe spiral gears 107 and 108, and intermediate worm-gear 109 which meshes in turn with a worm-wheel 110 fixed upon the vertical sectional shaft 111 112, the upper section of which is journaled in the gear case 104. .The shaft section 111 is provided externallywith the longitudinal groove 111 which is entered by the inwardly extending spline or key 112 of the tubular lc-wer shaft section 112 connected at its lowerend by means of the 'cross-pin 113 with the shouldered upper endof the feed drive shaft 100.

Fixed upon the vertical shaft-sections 11 1 journaled in the gear casing 104, are the spiral gears 115 meshing with the similar gears 107 108,-respectively, uponthe coun-v t'er-shaft 102. .Each of these vertical shafts 114 is connected by a universal joint 116, of any well-known or suitable construction, with the upper? end of a shaft-section117 I, provided externally, with a longitudinal' groove 11 8 entered-by the inwardly pro ect-' ingkey or feather 119 of-the tubular shaft section 120 entered in the'upper port-ion by the section 117 and. having at its lower end a universal joint connection 121,- through a suitable coupling 122 with the'upper end of the inclined work-holder actuatingshaft 81. As will be observed, the gear casing 104 is in practice so located above the machine thatthe shaft section 111 is in direct alineme'nt with .the'shaft- 100 for communieating operative movements to the feedcam; but as the work-holder actuating shafts 81 have gyratory and lateral movements upon the machine frame, it is obviously necessary to employ connections between the shaft members 81 and 114 which shall accommodate'such movements, but it.

is evident that the telescopic sections 117 and 120 may be readily replaced by flexible shafting of other kinds, if desired. In order to. expose the entire outer face of the pulleyrim Z) to the action of the abrading belt 29, it is requisite that; the work-holding bracket :47; should have .a bodily movement exceeding the width of the operative face of the abrading belt, so that the pulley-rim may beat all times directed from the hub portion toward the belt. By offsetting the bracket 47 from'the rock-shaft 43, andhencegfr'o'm its axis of .65 movement, and imparting to the arm 44 the which is arranged in a plane parallel with.

lateraltraveling movements as well as turn ing movements upon the. shaft 12, the work is constantly maintained in operative contactwith the abradingbeltand in progreelsively varying angular relation there-- Wit Having thus set forth the nature of the invention, what I claim herein is 1. In a machine of the class described, the. combination withan abrading member and driving means therefor, of a workholder for sustaining the work in contact with said abrading'member, feeding means connected with said work-holder for causingit'to travel transversely of the direction' of movement of said abrading member a distance greater than the width of the operative face of the latter, and means connected with the work-holder whereby the work is constantly directed upon the abrading member and from which it derives circular movements upon angularly arranged. axes one ofwhich is disposed in a plane sub-" stant-ially parallel with thedirection o foperative movementof the abrading member.

2. In a machine of, the class described,

.the combination with. anabrading member and driving means therefor, of a workholder, sustaining means therefor including twoflangularly disposed rock-shafts one of 9b thedirection of movement of the abrading member, means for imparting to the work-' holder swinging movements upon said rockshafts to expose the work mounted therein to the abrading member in different angular relations, and means for [imparting to the work-holder feeding movements transverse to the direction of movement of the abrading member. I

3. I11 a' machine of the class described,

the combinat-ion with an abrading member having a.yielding operative face and "driving means therefor, of a movable, .workholder, a swinging arm for supporting the '110 same, afulcrumfor. said arm,'a' second arm' supported by said fulcrum in angular relation' with t-he=.firstnamed arm, a weight secured upon. the second-named: arm andadjustable towardand from said fulcrum,

and feeding means connected with said Work-holder for causing the Work to travel transversely of: thefldirec'tio-n. of movement] ofsaid'abrading-member. I 1 i the combination. with an abrading member, and means for sustaining and driving'the same including a rotary shaft, of a workholder for sustaining the work in contactwith said abrading member, means for mov- 125 ing the work-holder crosswise of the face of the abrading member substantially parallelwith said shaft, and means for simultaneously imparting to said work-holder circular movements upon axesrespectively 4. In a machine of the class described, 120

. Work-holder; feeding means connected therewith for causing itto travel transversely of the direction of movement of said abrading member, and mechanism, including a rackbar with means. for sustaining it against endwise movement and a pinion meshing therewith and sustained in operative relation with the work-holder, for imparting an oscillatory movement-to the latter.

6. In a machine of the class described, the combinatien with an abrading member, and means for sustaining and driving the same including a rotary shaft, of a carrier, a supporting fulcrum for said carrier substantially parallel with said shaft and along which the carrier is adapted to travel, a swinging work-holder pivotally mounted upon said carrier transversely of said fulcrum, and means for moving said carrier lengthwise of its fulcrum.

7. In a machine of the class described, the combination with an abrading member and driving means therefor, of a swinging wortholder having a pivotal support and adapted to hold the work by gravity in operative relation ith the latter, and feeding means connected with said work-holder to cause the Wo-rkto travel transversely of the direction of movement of said abrading member.

8. In a machine of the class described, the

combination with an abrading member and driving means therefor, of a rock-shaft, a swinging work-holder mounted thereon to partake of its rocking movements, an arm fired upon said rock-shaft in angular relation with said work-holder, and a weight adjustably secured upon said arm to cause the work-holder to maintain the work in yielding contact with said abrading member. '9. In a machine of the class described, the combination with an abrading member and driving means therefor, of a work-supporting arm mounted to vibrate upon a fixed fulcrum, means for turning said arm upon an axis in angular relation with said fulcrum, and )VOlk-l'lOldlDg means carried by said arm and ofl set from said axis.

10. In a machine of the class described.

the combination with an abrading member.

and driving means therefor, of a traveling work-support provided with work-holding means, a fulcrum-bar upcn which said worksupport is mounted for laterally swinging and sidewise traveling movements, and a' the combination with an abi'ading member and driving means therefor, of a traveling work-support provided with work-holding means, a. fulcrum-bar disposed rearward of the operative face of the abrading member and upon which saidwork-support is suspended to maintain the work by gravity in contact with the abrading member, means for moving the work-support lengthwise of said fulcrum-bar and across the operative face of the abrading member, and a connection between said work-support and fulcrum-bar for varying the angular relation of the work to the abrading member.

12. In a machine of the class described, the combination with an abrading member and driving means therefor, of a traveling work-support movable transversely of the direction of movement of the abradingmemher, a rotary work-holding spindle carried by said traveling work-support and inclined in relation to the direction of movement of the abrading member, and means for turning said work-holding spindle.

18. In a machine of the class described, the combination with an abrading member and driving means therefor, of a worksupport comprising a bracket formed with spaced bearing members, a live spindle mounted in one of said bearing members and provided with a bearing portion to receive the work and with a crank-arm for positive engagement with the work, a retractable retainer mounted in another bearing member of said bracket and adapted to hold the work 111 ])(Slti011 upon said spindle, and an ejector acting in opposition to said retainer for dis charging the work after retraction of the retainer from operative relation therewith.

14:. In a machine of the class described, the combination with an abrading member and driving means therefor, of a movable work-support, a tubular live spindle mounted therein and provided with a longitudinally slotted work supporting portion, means for driving said live spindle, a re tractable retainer for holding the work in position upon said live spindle, and a pushrod. entering the hollow live spindle and provided with a lateral work-ejecting finger extending through the longitudinal slot of said spindle.

15. In a machine of the class described, the combination with an abrading member and driving means therefor, of a movable work-support, a live spindle mounted therein for carrying the work, means for driving said live spindle, an endwise and cir cularly movable cylindrical work-retaining member also mounted in said work-support and provided with a longitudinal slot with a transverse extension at one end, and a stop-pin carried by said work-support and entering the longitudinal slot of said retaining member.

"16. In a machine of the class described,

the combination with an abrading member and driving means therefor, of a movable work-support, a live spindle mounted therein for carryingthe work, means for driving said-live spindle, an endwise andci-rcularly movable tubular workretaining member also mounted in said work supportand provided with locking means for holdingit in operative position, and a'work-engaging thimble fitted loosely within the operative end of said work-retaining member and formed with an axial cavity to receive the adj acentend of said live spindle.

17. In a machine of the class the combinationjwith an abradin-g member 1 and driving means therefor, of a movable VOPlXr-S UPIJ OTt a live spindle mounted there in for carrying the'work, means for drivingsaid live spindle, an endwise and circularly movable tubular work-retaining member also mounted in said work support and provided withlocking means for holding it in operative position, and a work-engaging thimble fitted loosely within and longitudinally adjustablein the operative end of said work-retaining- .member and formed with an axial cavity to receive the adjacent end of said live spindle; Y

18. In a machine of the class described, the combination with a polishing belt pro- 1 vided with an abrasive operative face, supporting pulleys for said belt, and means applied to one of-said pulleys for driving the same, of a work-holder for presenting the work to the'operative face of said belt in termediate its supporting pulleys, and spaced idler ipulleys adjustable toward and from each other'and disposed at opposite sides of. tl1e point of applicationof the work and at the back'of the abrading belt for sustaining the thrust of the work.

19. In a machine oflthe class described,

the combination with a polishing belt pro-,

vided withan abrasive operative face, sup- )ortin ullevs for said belt and meansapplied-to one of said pulleys for driving the same, of a work-holder for presenting the work to the operative face of said belt. intermediate its supporting" pulleys, and idler pulleys disposed at opposite sides of the width of the belt andspaced apart inthe direction of movement 0 the belt upon opposite sides of the point f application of the work to said belt.

-20. In a machine-of the: class described,

I the combination with an abrading member and driving means therefor, of [a movable work-supporting arm, a rack-bar mounted upon a fixed' support transversely of the direction of movement of the operative face of, said abrading member, a reciprocating -sleeve fadjaccnt said rack-bar, a rock-shaft journaled in said sleeve andvhaving said work-supporting arm fixed thereto, a pinion described,

fixed upon said rocleshaft and adapted t(.

mesh with the teeth of said rack-bar", and

of said sleeve and having the spaced members of the yoke of said work-supporting arm fixed thereon and embracing said boss,

mediate the spaced-members of saidboss and adapted to mesh with'the teeth of said rack-bar, and means for reciprocating said sleeve to impart bodily reciprocatory'and oscillating movements to said work support, ing arm.-

22. In a machine of theclass described, the combination with. an abradingmemb'er and driving means therefor, of a movable work-supporting arm, a rack bar mounted .upon a fixed support transversely of the direction of movement of the operative faceof said abradmg member, a reciprocating sleeve mountedupon said rack-bar which affords a.fulcrum upon which the sam;: is adapted to oscillate, a rock-shaft journaled in said sleeve and having said work-supporting arm fixed thereto, a pinion fixed upon said rock-shaft-and adapted t-0 'InSll with the teetlrof said rack-bar, and means for reciprocating said sleeve to impart bodily reciprocatory and oscillating move: ments to said work-supporting arm.

23. In a machine of the class described, the combination with an abrading member a pinion fixed upon said rock-shaft interand driving means therefor, of a rack-bar mounted for oscillation upon a fixed supporttransversely of the direction of movement of the operativeface of said abrading -member,' a reciprocating sleeve mounted upon said rack-bar with which it is adapted to oscillate, a work s'upporti-ng arm pivotally mounted upon said reciprocating sleeve and having rigidly connected therewith a pinion meshing with saidrack-bar, and

means for reciprocating said sleeve to impart bodily reciprocatory and oscillating movements to said work-supportmgarm.

24.- I-na machine of the class described, theicornbination with an abrading member and driving means therefor, of a rack-bar monnted jfor oscillation upon afixed support transversely of the direction of move.-

ment of the operative face of said abradrec ing member, a reciprocating sleeve mounted upon said rack-bar with which it is adapted to oscillate, a worlosupporting arinpivot ally mounted upon said reciprocating sleeve and having rigidly connected therewith a pinion meshing with said rachbar, means for reciprocating v said 'sleeve to impart bodily reciprocatory and oscillating move ments to said work-supporting arm, a detent shoulder carried by said oscillatory rackbar, and a movable stop mounted upon sf fixed part of the machine and movable into and out of operative relation with said detent shoulder.

35. In a machine ofthe class described, the combination with an abrading member and driving means therefor, of a rack-bar mounted for oscillation upon fixed sup port transversely of the direction of move- .ment of the '-,operative taco of saidiabrading n1e1nber,-,a reciprocating sleeve mounted upon sstidraclebar with which it is adapted to oscillate, worlt supporting arm pivot ally mounted upon said reciprocating sleeve and having rigidly connected therewith s, pinion meshing with said rack-bar, means for reciprocating said sleeve to impart bodil reciorocatorv' and oscillatin movements to said work-supporting arm, a collar fixed upon sald oscillatory rack-bar and )rovided with e detainin tooth and a sto work to the abrasive face of the belt, means connected with said sleeve-to impart bodily member, a

lever with {1 depending shoulder pivotally mounted upon a fixed part of the machine and adapted to normally rest upon said fixed collar-and to operatively engage said tooth with its depending shoulder when said sleeve is rocked into extreme inoperative position with the work-support retracted from operative relation withsaid belt,

26. In a machine of the class described,

reciprocalory and oscillating movements to said work-supgtiorting arm, and means, in cluding a shaft-disposed longitudinally of said worlesupporting arm, for imparting rotary movements to said work-holding v spindle.

27. In a machine of the class described, the combination with an ubrading member and driving means therefor, of a raclf-bar mounted for oscillation upon a fixed supvfor actuating the same, end an oper'zitive connect on intermediate the feed-cam and said CEHTIQI whereby reciprocetory i'nove direction of mo no ions port transversely of; the direction or" moves.

n ent of the operative face of said shreding membena reciprocating sleeve mounted upon said rack-bar with which 1t 18 adapted to osoillateya work suppo'rting arm pivotally mounted uponseid reclprocating sleeve and extending therefrom st an inclination to its supporting pivot and having rigidly connected therewith a'pinion meshing with said rack-bar, a Workaholding spindlecarri'ed by said work-supporting arm and adapted to present the Work to the abrasive face of the belt, means connected with said sleeve to impart bodily reciprocatory and oscillating movements to said work-supporting arm, and means, incl tding aishaft disposed longitudinally of said work-support: in arm, for impsrti g" rotary movements to said worloholding spindle.

28. ln a machine of 'he class described,

'ih-rading member etor, of a support-;

the combination and actuating means .3 ing iulcrum-har disposed above and parallel with the operative. face of the; abrad ng i ith means foe-sustmeinber and provided tail ng it again:

oscillating and recipi ed upon and movable loh'gitn'ilinallyof said fulcrum-bar, a swin i ork-sup'porting' 1:: arm sustained by said carrier and adapted to present the worlcto the operative'jtaceot the abrading member, a feed-cam, 'Inea s ments are i uni-ted to the latter independ ently ofssi supporting fulcrum-bar.

devise movement, an .g carriermount-f too 2-9. ln s machine otthe class described,

the con'zbination with an abrading member and. driving means therefor, of a reciprocatrier is adapted to move transvers ly of the enient of said abrading unporting arin sustains member, a we by oerrn work to the o; 'e face of the abrndingmember, a 1, an endn'ise movable bar actuate-s. by s feed-cam, a connection intermediate said bar and said carrier and provided with interlocking couplii'ig men hers adapted to be shi at will into and out of operativeengagement, and means for actuating said 3G, in of the class described, the comhin: on abraoing member and {lslV 9f nieens therefor, ot a reciprochin g eatery a support upon which said carrier s adnptcd to reciprocate transwrs l on of movement of said librading nieznb .i we l t-supporting arin sustained by sale carrier and adapted to present the work to the operative face of the abradingf'member, a feed-cam, an endwise movable bar actuated by said feedoain, a detachable conn 'ion between said carrier, supporttupon which said car- 7 adapted to present the bar and said carrier, thesame being thrown into operative and inoperative'relation by the'oscillatory movements'of said carrler,

- and means for actuating said feed-cam.

catory rocking carrier, a support upon which said carrier is adapted to reciprocate transversely ofvthe direction of movement of said abradin member, a work-supporting arm sustaine .by said carrier and adap'te to pre'sentthework-to the operative face of member, a'feed-cam, an endwise movab e bar provided with a 'later'aL 1 coupling shoulder and actuated by said feedcam, a yoke'extending from said carrier and normally engaging the coupling shoulder.

of said bar, but adapted to bedetached therefrom when said carrier is rocked upon its support, and m'e'ans'for actuating said 32. In a machine of the class. described, the combination with an abrading member and driving means therefor, of a traveling work -holder, means for rotating the same including a rotary shaft, a counter-shaft, a plurality of cross-shafts, angular gearing connecting the counter-shaft with one ofsaid cross-shafts, an intermediate shaft with universal joint connections respectively with said work-holder, worm gearing connecting the'countens'haftwith another of said crossshafts, and means connected with the latter for effecting the travel of said work-holder crosswise of the abrading member.

In testimony whereof, I have signed my name :to this specification, in I the} presence of two subscribing. witnesses;

' OLIVER L. DOSCH.

Witnesses:

HENRY J (MILLER, JOSEPH .F. J AQUITEL said cross-shaft and the actuating shaft of"

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