US1686960A - Carving machine - Google Patents

Description

Oct. 9, 1928.

J. E. COOPER v ;CARYING-' MACHINE Filed Jan- 27,' 1926 4 Sheets-Sheet .INVENTOR Jameazffaa BY MSATT RN Ys Oct. 9, 1928. 1,686,960

J. E. COOPER cmvme momma Filed Jan. 27, 192s 4 Sheets-Sheet 2 INVENTOR %zlsA ORNEYS Oct. 9, 1928. 1,686,960

J. E. COOPER CARVING IACHINE Fil n- 27, 1926 4 Sheets-Sheet 4 IN ENTOR James E. er

Patented Oct. 9, 1928.

UNITED STATES JAMES E; COOPER, OF PER-RY, NEW YORK.

CARVING MACHINE.

Application filed January 27, 1926. Serial No. 84,051.

The present invention relates to a carving machine and has for one objectto provide an improved machine of this class designed particularly for carving or finishing knife handles constructed of bone or other suitable material.

A further object of'the invention is to provide a carving machine embodying one or more rapidly driven cutters together with improved work holding and advancing means by which various movements are imparted to the work while it is being fed in engagement with the cutters whereby knife handles and other articles may be rapidly carved or. cut in accordance with different predetermined designs or patterns.

A further object of the invention is to provide an improved machine of the class described which is particularly adapted for the rapid production of knife handles simulating or having the appearance of buckhorn.

To these and other ends the invention resides in certain improvements and combina-' tions of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings:

Figure 1 is a front elevation of a machine illustrating one embodimentof the invention;

Figure 2 is a top plan view of the same;

Figure 3 is a similar plan showing the work holder and other part-s in a different operating position;

Figure 4 is a transverse sectional elevation taken on line t e of Figure 2;

Figure 5 is an end elevation as viewed from the left of Figure: 1; t

Figure 6 is an enlarged fragmentary sectional elevation taken on line 6 6 of Figure 2;

Figure 7 isa sectional ele ation somewhat similar to Figure 6 with the work holder shown tilted to one of its eXt-remeoperating positions Figure 8 is a transverse sectional eleva-.

nuts.

of one of the operatingconnections for rocking the work holder;

Figure 10 is an end elevation of the support for the eccentrically mounted work bar; 7 Figure 11 is a fragmentary sectional elevation taken on line 11 -11 of Figure 10; Figure 12 is an enlarged sectional elevation taken on line 1212 of Figure 2;

Figures 13 and 14 are. sectional views taken transversely vof the eccentrically mounted work holding bar showing the latter adjusted to different heights to accommodate work pieces having different curvatures;

Figure 15 represents a face view of one of the'handle sections completed by the present machine;

Figure 16 is a cross section through theare indicated at 1 2 and are adapted to be" driven preferably at a relatively high rate of speed by any suitable driving means, being in the present instance detachably carried by the spindles 13 which are provided with pulleys 1% arranged to be driven by belts 15.

The spindles are supported in suitable bearin gs llicarried by a frame 17 having opposite ly projecting plate portions 18 and 19, as shown in Figures 1 and 2. The frame is supported for vertical adjustment preferably by bolts or screws 20 which are threaded in suitable supports 21 projecting upwardly from the base 10. The screws are provided with nuts 22 engaging the plates 18 and 19 on the lower sides thereof to form adjustable supports for the frame 17, the upper nuts 23 serving to clamp the plates upon the lower Thus, means is provided for varying the height of the cutters to accommodate them to diiferent siz e work pieces as will appear hereinafter.-

The work is carried by an adjustable holder or support'embodying a number of parts including the. rectangular shaped bar 24 having its ends provided with trunnions journaled eccentrically in bearing blocks 26 which in turnare adjustably mounted for rotation in the upstanding ends of frame or support 28 ea'ibodying a plate extending longitudinally beneath the bar the eccentrics 2G havii V flanges clamped upon the ends by screws 27 as shown in Figures 10 and 11. The frame 28 is provided adjacent its center with downwardly turned lugs 29 having a pivot bolt30 extend ing horizontally thcrethrough to receive the head 31 of a vertically disposed pivotal member 32 which is journaled in a bearing 33 secured to the top of the base plate 10 shown in Figure 4. The pivotal member --2 is'projected downwardly through an open-' ing in the base plate 10 and is preferably provided with a spacing sleeve 34 adapted to engage an arm 35 clamped upon the lower end oft-he sleeve by a nut 36 on the reduced end 37 of the pivot member 32 as SllOWll'ili Figure 4. A tensionspring connects the outer end of the arm with one end of the frame or work supporting plate 28 for a purpose which will hereinafter appear.

A bracket or holder 39 is secured to the work supporting bar 24 by means of the bolts 40 as shown in Figure'2, the holder forming a support for the feed rolls and the gearing for drivingthe same. The upper rolls are indicated at 41 and the lower rolls at 42, the latter operating in transversely extending slots 43 formed in the bar 24 as shown in Figure 4. The lower rolls are connected with and driven by the parallel shafts 44 which are journaled in the holder 39 as shown in Figure 6 and which carry at their outer ends the gears 45. The upper rolls 41 are carried on the inner ends of a series of shafts 46 having gears 47 meshing with the gears as shown in Figure 8. A gear 48 driven by the intermediate lower gear 45 serves to drive the right hand gear 45 which in turn drives the upper right hand gear 47. The remaining gears 47 are driven, one by the lower left hand gear 45 and the other by the lower intermediate gear 45 and the two last mentioned gears 45 are driven by a gear 49 on the end of a stub shaft 50 connected by a universal joint 51 with a sleeve 52 telescoped upon a drive shaft 53 and adapted to be driven by the latter through a key 52 The shaft 53 is connected by a universal joint 53 with a driving connection 54 journaled in a bearing 55 supported by the left hand end of the base plate 10. The driving connection 54 carries a stepped pulley 56 by which it is driven, the pulley being driven by a belt 57 as shown in Figure 5.

The shafts 46 which carry the upper feed rolls 41 and gears 47 are journaled in floating bearings 58 guided vertically between the side walls of the holder 39 and a pair of upstand ing lugs 59 at one end of the holder and a corresponding pair of lugs 60 at the other end of the frame. The floating bearings 58 are inclined upwardly at theirbottom edges and toward their inner end as indicated at 61 in Figure 6 to permit them to have a slight rocking movement under the pressure of the springs 62, the lower ends of which engage the inner. ends of the bearings while the upper ends are seated upon the lower face of a bar 63 secured to the'side walls of the holder 39 and to the upstanding lugs 59 by means of screws 64. The slight vertical movement of the bearings 58 is not suiiicient to cause the gears 47 to move out of operative relation with'respect to the gears 45 but is sufiicient to permit the upper feed rolls 41 to accommodate themselves to work pieces of difierent thicknesses, within the desired range of the articles to be operated upon. Upward displacement of the bearings 58 attheir outer ends is prevented by a plate 65 overlying the l bracket as shown in Figures 2 and 6; A casing 66 is provided for protecting the train of gears carried by the bracket, thecasing being suitably connected with the bracket in any desired manner. A tension spring 67 is connected with the plate 65 and is adapted to be secured at its upper end to a suitable support, not shown, the spring serving to form a yieldable or flexible support for the bracket and certain of the parts-supported thereby.

The work, indicated at 68 in Figures 3 and 4, comprises in the present instance a piece of stock of any suitable material cut to the size and shape desired, preferably comprising a section of a knife handle having the usual curved or rounded face on the exposed side thereof. In advancing the handle sections to the feed rolls they are disposed on a plate 69 carried by the bar 24 and are guided at one side by an adjustable plate 70 connected with the plate 69 by the clamping screws 71 extending through slots 72 in the plate 7 0, the latter being adjustable to accommodate work pieces of different widths. The plate 70 is provided with an extended guide portion 73 projected inwardly close to the first set of feed rolls as indicated inFigure 3. Opposite the extended guide portion 73 is disposed an additional guide for the work comprising a slotted plate 74 held in any desired position of adjustment by a clamping screw 75 threaded into the plate 69, the guide 74 being close to the feed rolls so as to continue to engage the work piece while it is being ad vanced by the first and preferably by the second set of rolls. The feed rolls are preferably made of steel and are roughened so as to better grip the work passing therebetween.

They may however be made of any other duce'the carving operations, are cut and shaped to the proper 512565 with their outer,

faces curved or rounded to the desired degree.

'.= In'finishing the handles to simulate buckhorn it is necessary to impart variousmovements to the work holder so as to afford irregularities in the depth, length and contours of the numerous cuts produced and to obtain these different movements mechanism has been provided which will'now be described. In this connection it should be remembered that three separate movements are'simultaneously impartedto the work holder and-"that the extent ofthese movementsmay be varied by suitable adjustments provided for and further that the speed of the various driving parts for nnparting'the different movements may be varied as desired to effect the variations in the results produced. The several movements take place about the pivotal axes of the bar 24, the pivot bolt 30 and the pivotal member 32; the axis of each of these members being preferably at a right angle to thatof the axes of the other two members. The mechanism for imparting thesemovements will be described in the order named. The

' rocking of the bar 24 about its horizontalaxis as defined by the centers of the trunnions 25 is necessary in order to move all parts of the curved or convex'face of the work piece into engagement with the cutters, the idea of which is illustrated by the difference in the positions of the work holder as shown in Figures 6and 7. The rocking of the bar 24 about its horizontal axis is effected through the operation of a flexible sha 't embodying preferably the telescoping sections 7 9 and 80, the flexible joints 81 and 82, the inner operat ing section 83 and the outer driving section 84, journaled in a suitable bearing 85 and driven through a pulley 86 by a belt 87 as shown in Figures 3 and 5. The inner section 83' is journaled in a bearing 88 carried by a bracket 89, depending from the. frame 28 which supports the work holder 2 1-jas shown in Figure 12. The shaft section 83 is provided with a disk or wheel 90 slotted at 91 to receive a nut 92 through which extends a screw 93 for adjusting the nut within the slot. The nut carries an extension 94; having a ball and socket connection with link 95 which in turn is adapted through another ball and socket connection to operate extension-96 of a. block 97 having slots 98 for receiving the clamping screws 99 threaded into the work holdingbar 24:. The block is made adjustable to take care of the different positions of the link 95 upon adjustment of the block 92 to vary-the throw of'the linkin order to-vary the extent of movement of the barv 2 1-upon oscillation of the latter bythe means just described. In this connection it will be understood thatwith a workpiece ,having'a curve struck from 'a'relatively short: radius; as. indicated in Figure 14 that the throw of the bar must be greater than for the work piece shown in Figure 13, having a curve struck from a longer radius, the throw. being regu lated by varying the throw of the pitman or link 95. During oscillation of the bar 24 about its axis-the flexibledrive shaft ,5258 will assume Various angular positions andlwillof course continue to drive the chain of, gears shown in Figure 8 and through them the feed rolls will be driven to advance the work in the direction indicated by the arrow in Figure 4:. 1

Where there is an appreciable difference in the radii of the curves-of the handle sections 2 to be carved, the eccentrics 26 which support the bar 24 areadjusted accordingly as indi I cated by the showin in Figures 13 and; 141. The eccentrics may T e adjusted so that the distance between the curved surface of the handle and the axis of the bar'24 will correspond substantially to the length of the particular radius employed in; producing the curve on the machine usedin shaping the handle. j

In the raising or lowering of the bar 2 1 through adjustment of" the eccentrics, the work will be shiftedvertically with respect to the cutters andin certain cases at leastit will thereforebe necessary to raise or lower the cutters accordingly andgthis is done by adjusting the screws-20 or changing the position of thenuts thereonwhich support the frame 17. I. V

Oscillation of'the frame 28 upon its pivotal axis 30 to continuously shift the bar 2 t during the cutting operation is effected by a cam or'eccentric 100 driven'by a shaftlOl-j-ririrnaled at its'inner end in a suitable bearing formed in the block 102, as shown in Figure 4:, and at its outer end in a bearing .103, the shaft at this end carrying a pulley 104 driven by a belt 105' on a small pulley 106 carried by the shaft 86 as-shown in Figures 3 and 5. The cam 100 is adapted to'receivethe lower end of a plunger 107 guided by the brackets 102 and having on its upper end a roller 108 engaging a hardened plate109 on the bottom of the frame 28. The spring 38 serves to yieldingly maintain the work in engagement with the roller 108; By thus rocking the holder upon the axis 30, the cuts indicated at 110 in Figure 17 are successively produced as the work advances and since the work is also being oscillatedin a direction at a right angle to its line of movement by the movevaried. This effect is still further emphasized by the third movement of the holder in oscillating it about the axis of the pivotal member 32.

The means for rocking the work holders about the axis of the pivotal member 32 comprises a pitman 111 connected with the underside of the frame 28 by a ball and socket joint 112 and at its outer end with a plate 113 by a ball and socket joint 114:. The plate 113 is adjustably connected by a bolt 113 with a slotted arm 115 of a bell crank lever 116 pivoted upon a downwardly projected lug 117 carried by a bracket 118 secured to another bracket 119 which supports the bearing for the short shaft 54. as shown in Figures 3 and 5. The bell crank lever 116 is rocked by a connection 120 actuated by the crank arm 121 of a disk 122 on the shaft 54 as shown in Figure 3. Thus, it will be seen that three separate movements are imparted to the work holder at the same time, the movement last described being particularly adapted to prevent the various cuts from extending parallel to each other, or in other words, to produce a series of cuts disposed at a slight angle one with respect to another. By the last named operation the direction of movement of the work is rapidly changed and by thus continuously interrupting its course of movement and imparting the additional movements described, numerous cuts are produced which vary in shape and size as well as in their angular relation, whereby the desired irregular effect is afforded and the handle sections when completed have the general appearanceof buckhorn. The variegated effect produced may be increased by using cutters having teeth of different sizes and further by so positioning the cutters that the teeth of one willoperate between the cuts produced by the teeth of the other.

Further irregularities in the size and shape of the various cuts may be afforded byvarying the speeds of the several operating mechanisms as will be understood.

The work after passing through the machine is allowed to drop off of the oscillating bar 2 1 into a receptacle below, not shown.

While the present embodiment of the invention is one adapted for producing knife handles and the like simulating buckhorn, it will be understood that themachine is not limited to this particular class of work since by varying the adjustment of the operating parts or by employing only two of the movements described or by varying the number and shape of the cutters, different designs or patterns may be cut on different kinds of articles. I

I claim as my invention:

1. In a machine of the class described, base, a work holder, a plurality of supporting devices for the holder mounted upon the base and adapted for oscillation in different directions at the same time, one upon another, means for snnultaneously operating said devices and a tool adapted to'operate upon the work during movement thereof. 7

2. In a machine of the class described, a base, a work holder, a plurality of supporting devices for the holder mounted upon the base and adapted for oscillation in differentdirections at the same time, oneyupon another, means for operating said devices, a revoluble cutter adapted to produce a series of irregularly shaped cuts upon the work and driving means for the cutter.

3. Ina machine of the class described, a frame, an oscillatory support thereon movable about one axis and having adjustable eccentric bearings angularly disposed with respect to said axis, a member having its opposite ends journaled in the bearings, a guide for the work upon said member, feeding means for the work carried by said member, means for automatically oscillating said holder and said member-and a cutter adapted to engage the work during advancement and oscillation'thereof. 4. In a machine of the class described, a frame, an oscillatory work holder thereon said holder having a pair ofv adjustable ec-s centric bearings and a bar having its opposite ends journaled in said hearings to oscillate about a different axis fromthat of the holder, feed rolls for advancing the workjupon the bar, means for driving the feed rolls, separate operating devices for simultaneously oscillating the bar and the holder, and a cutter adapted to engage the work duringadvancement and oscillation thereof. 7 g

- 5. In a machine of the class described, a frame, an oscillatory support mounted to swing about a vertical axis and having a pair of adjustable bearings, a bar having its opposite ends'journaled in said bearings, feed rolls for advancing the work upon the bar, means for driving the feed rolls, means for oscillating the bar, means for oscillating said support, a revoluble cutter having a plurality of teeth adapted to engage the work idure ing advancement thereof and driving'means for the cutter.

6-. In a machine of the class described, a frame, an oscillatory support thereon, a work supporting bar having its opposite ends journaled upon the support, a holder carried by the bar, separate sets of feed'rolls for the work journaled upon the holder, one set of which is disposed in transversely extending recessed portions of the bar,drivingmeans for the feed rolls including a single flexible shaft connected therewith, means for oscillating the bar, means for oscillating the support, and a revoluble cutter having a plurality of teeth adapted to engage the work during advance? ment and oscillation thereof.

7. In a machine of the class described, an oscillatory frame, a work supporting bar having its opposite ends journaled upon the frame, a holder carried by the bar, separate sets of feed rolls for the work journaled upon the holder, one set of which is disposed in work supporting bar having its opposite ends journaled upon said frame, a support carried bythe bar, a plurality of upper and lower work feed rolls having spindles journaled upon said support, driving means for the spindles, means for oscillating, the frame, means for oscillating the bar upon the frame and a revoluble cutter adapted to engage the work during advancement and oscillation "thereof.

9. In a device of the-class described, a base, a frame mounted for oscillation thereon, a

work supporting b'ar having its opposite ends journaled upon said frame, a support carried by the bar, a plurality of upperand lower work feed 'rolls having spindles j ournaled upon said support, a flexible shaft operatively connected with the spindles, means for driving said shaft, means for oscillating the frame, means for oscillating thebar upon the frame, and a revoluble cutter adapted to engage the work during advancement and oscillation thereof. r

10. 'In a device-of the class described, a base, a frame mounted for oscillation thereon, a work supporting bar having its opposite ends 'journaled uponsaid frame, a support carried'by'the bar, a plurality of upper and lower work feed'rolls havingspindles journaledupon said support,ga train of gears for driving said spindles, 'a flexible shaft operatively connected with one of the gears, means for driving said shaft, means for oscillating the frame, means for oscillating the bar upon the'frame, and a revoluble cutter adapted to engage the work duringadvancement and oscillation thereof. 1

11. In a device of the class described, an oscillatory frame, means for oscillating the frame, a support pivoted to swing upon the frame, means for oscillating the support, a plurality of feed rolls having spindles ournaled upon said support, gears upon said spindles, additional feed rolls for cooperation withthe first mentioned rolls, spindles for driving the second mentioned rolls having gears meshing with the first mentioned gears, floating bearings for the second mentioned spindles, means yieldingly urging the second mentioned trolls toward the first, driving meansfor. said gears including a single flexible shaftconnect-ed therewith anda revoluble cutter adapted to engage the-work during advancement thereof bysaid rolls.

12. In:a device of the class described an oscillatory frame, a bar mounted for oscillation upon the frame, a plurality of feed rolls having spindles journaled uponsaid support, gears upon said spindles, additional feed rolls for cooperation with the first mentioned rolls, spindles for driving the second mentioned rolls having gears meshing with the first mentioned gears, floating bearings for the second mentioned spindles, means yieldingly urging the second mentioned spindles toward the first, driving means for said gears, a

revolublev cutter adapted to engage the work during advancement thereof by said rolls, means for oscillating said frame, and means for oscillating the bar thereon.

13. In a device of the class described, a base, a pivotal support carried by the base,

a frame pivoted upon the support for oscillation about an axis at an angle to the axis of the support, a work holder upon the frame,

a revoluble cutter, means upon the holder for automatically feeding the work into engagement with the cutter, means for auto,-

matically rocking the frame upon the support, and automatic means for oscillating the support. I

14. In a device of the class described, a base, a pivotal support'carried by the base,

a frame pivoted upon the support for oscil- I lation about an axisat an angle to the axis of the support, a work holder pivoted upon the frame, a revoluble cutter, means upon the holder for feeding the work into engagement with the cutter, means for rocking the frame upon the support, means for oscillating the support, and means for oscillating the holder upon the frame. 7

15.In a device of the class described, a base, a'pivotal support carried by the base, a frame pivotally mounted upon the support for oscillation about an axis at .an angle'to the axis of the support, an arm carried by the support and adapted for oscillation thereby, means for oscillating the frame, a yielding connection between the arm and frame adapted to maintain the latter in engagement with said oscillating; means, means for oscillating the pivotal support, a work holder carried-bytheframe and a cutting tool adapted to operate upon the work during oscillation of said frame and support.

16; In a device of the classdescribed, a base, a support pivoted upon the base, a frame pivoted upon the. support for oscillation thereon about an axis at; an angle to the axis ofthe support, a work holder carried by the frame, a cutting'tool adapted for operation upon thework operating means connected with the frame adapted to automatically os Ian cillate it about the axis of the support, and automatic means for rocking the frame upon the support. 7

[17. In a device of the class described, a base, a support carried by the base, a frame pivoted upon the support, a work holder pivoted upon the frame, a revoluble cutter adapted to engage the work, means for automatically oscillating the frame upon the support, and automatic means for oscillating the holder upon the frame.

18. In a device of the class described, a base, a support carried by the base, a frame pivoted upon the support, a work holder pivoted upon the frame, means for automatically oscillating the frame upon the support, automatic means for oscillating the work holder upon the frame, feed rolls for the Work carried by the work holder, driving means for the rolls a rotary cutting tool adapted to-operate upon the Work during oscillation of the frame and work holder, and means for adjusting the tool transversely of its axis of rotation.

19. In a device of the class described, a base, a pivoted support carried by the base, a frame pivoted upon the support, a work holder pivoted upon the frame, means for oscillating the frame upon the support, means for oscillating the work holder upon the frame, feed rolls for the work carried by the work holder, driving means for the rolls, a cutting tool adapted to operate upon the work during oscillation of the frame and work holder, and means connected with the frame adapted to oscillate it about the axis of'the pivotal support independently of its pivotal movement thereon.

20. In a device of the class described, a base a support pivoted thereon, a frame pivoted upon the support, a work holder pivoted upon the frame, a plurality of feed rolls for the work carried by the holder, a power driven member, a flexible drive shaft having one end connected therewith and the other operatively connected with the feed rolls, means adapted to be operated by the power driven member for oscillating the frame, means for oscillating the work holder upon the frame, and a cutting tool adapted to operate upon the work during oscillation and advancement thereof.

21. In a device of the class described, a base, a frame mounted to swing about a vertical axis thereon, a work holder mounted upon the frame, a plurality of feed rolls for the work carried by the holder, power driven member, a flexible drive shaft having one end connected therewith and the other operatively connected with said feed rolls, a lever adapted to be actuated by said power driven member, .an operating connection between the frame and the lever adjustable upon the latter for varyingthe extent of movement of the holder, and a cutting tool flexible driving connection for said rotatable adapted to operate upon the work during oscillation and advancement thereof.

22 In a device of the class described, a base, a support pivoted upon the base, a frame pivotally mounted upon the support, means for oscillating the frame aboutits pivotal axis, a work holder pivoted upon the frame, means for oscillating the frame about the i pivotal axis of the support, a memberrotatably supported by the frame, a flexible operating connection between said member and the work holder for oscillating the latter, said cbnnection being adjustable to vary the ex- I tent of movement of the holder,-dri-ving means for said rotatable member, feeding means for the work and a cutter adapted to engage the work during oscillationand advancement thereof. V j n 23. In a device ofthe class described, a base, a support pivoted upon the base, a

frame pivoted upon the support, a Work holder pivoted upon the frame, means for oscillating the frame about the pivotal axis of the support, means for oscillating the frame about its own axis, a rotatable member carried by the frame and having an adj ustable crank arm thereon, a flexible operating connection between said crank arm and said work holder for oscillating the latter, a

member,'means for advancing the work upon the holder, and a cutter adapted to operate upon the work during advancement thereof.

'24-. In a device of the class described, a base, a cutter revolubly mounted thereon, a horizontally disposed frame pivotally connected with the base, a work holder extending transversely of the pivotal axis of the frame, bearings for the opposite ends of said work holder adjustable upon the frame to raise and lower the holder relative to the cutter, feed rolls for the work j'ournaled upon the holder and extending transversely of the axis thereof, a flexible driving member operatively connected with the feed rolls, means forrockin'g 1 the holder upon the frame, yieldable supporting means for the holder connected therewith at one side of its pivotal axis, oscillating means for the holder, and means for oscillating the frame. v 25. In a device of the class described, a base, a cutter revolubly mounted thereon, a horizontally disposed frame pivotally connected with the base for oscillation thereon, a Work holder extending transversely of the pivotal axis of the frame, bearings for the opposite endsof the holder adjustable upon the frame to effect adjustment of the work relative to the cutter, feeding means upon the holder for advancing the work during the cutting operation, a revoluble member connected with the frame, driving means for said member, an adjustable operating connection between the revoluble member and the holder for oscillating the latter, and

igieans for oscillating the frame upon the ase.

26. In a device of the'class described, a base a Work holder, means upon the base 5 adapted to support the holder for operation in different directions about different axes extending at an angle one to the other, means by which said oscillations are effected simultaneously, Work feeding devices carried by the holder, driving means for sai devices, a revoluble cutting tool adapted to engage the Work between the feeding devices and means for adjusting the tool relative to the Work.

JAMES E. COOPER.

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