US1440603A - Profiling machine - Google Patents

Description

J an. 2, 1923.

Hfc. HOOK.

PROFILING MACHINE.

4 SHEETSSHEET l.

FILED OCT. 14, 1920.

w wo if e m ,H

Jan. 2, 1923.

H. C. HOOK.

PROFILING MACHINE.

4 SHEETS-SHEET 2- HLED 0CT.14, 1920.

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PROFILING MACHINE.

4 SHEETS SHEET 4.

FILED OCT. 14, I920.

fzzyeraioz HEN/9V C Hoe/r,

2W2 My uhunuuupunuw Patented Jan. 2,1923.

HENRY c. noon, on wmnsoa, vnaivronr, assronoa, BY Masha ASSIGNMENTS, 'ro

ALUMINUM MANUFAGTURES, INCORPORATED,

RATION OF DELAWARE.

or CLEVELAND, OHIO, A 00320- Toall whom it may concern:

Be it known'that I, HENRY G. 110011, a

' citizen of the United States, residin at Windsor, county of Windsor, State of mont, have'invented a certalnnew and .useful Improvement in Profiling Machines, of

which the following is a specification, ref-,

erence being, had therein to the accompanying. drawings.

This invention relates to profiling machines of the class adapted to remove portions of the surfaces of solid objects. latcs especially to a machine for forming oil grooves of any desired confi uration on theinner surface of substantia ly semicylindrical bearings.

One object of the invention is to construct a profiling machine which will reproduce the surface reliefs or elevations and face'of a work blank. j I Another object of the invention is to construct a simple, improved machine for accurately reproducing the surface grooves of a master plate on the surface ,of work blanks. Another object of the invention is to construct an improved machine for accurately, quickly and cheaply forming grooves of various configurations in the inner sur face of substantially semicylindrical bearin s.

another object is to construct an improved profiling machine for forming grooves in the lnner surfaces of substantially semicylindrical bearings of various SIZeS- Another object is to construct an im-. proved profiling machine for forming depressions in the inner surface of .semicylindrical objects ofIrelatively small diameters. Another object is to devise a new and improved means of mounting and actuating the cutting tool of a profiling machine of the class described. a Another object is to devise a new and improved means for mounting and connecting a source of power with the cutting tool of aprofiling machine of the class described.

Other objects more or less intimately re.- lated'to these objects will be pointed out in the following specification.

To disclose my invention so that it may be easily understood by those skilled in the art, I have chosen to describe inrdetail a It rev arrows.

specific form ofmachine made in accord-.

ance' with the principles of my invention and to illustrate, the various parts of this machine in the accompanying drawings which constitute a part of thi -Mi t1on and in'which, r

Fig. 1 is a top plan view of acomplete' machine adapted to formrooves on the 1111181. surface of semlcylm rlcal bearings.

Fig.2 is aside elevation, partly in sec- ,tion, taken on line 2-2 Fig. I.'

Fig. 3- is a plan view partly in section taken on line 3--3 of Fig. 2.

Fig. 4 is an end elevation, in' section, taken on line 4-4Fig. 1 showing themachine assembled for cutting. Fig. 5 is a view similar to the blank holding mechanism retracted and theblank removed. depressions of a master object on the'sur- Fig. 6 is an enlarged detail View of the cutter 1 and its and 5. p

, Fig. '7 is-a similar view of a modified form of cutter-mounting ,for small bearing blanks.

Fig. 8 is a sectional view, taken online 8 8. Fig. 2- looking in the-directions of the Fig. is an enlarged section taken on line 9-9 Fig. 2 showing details of the tracing pointer.

Fig. 10 shows in' plan view a rod with an eye head and eye 33' forming part of the blank holding device.

The base 1 which may be secured to a table, bench or. other suitable supporting means (not shown) carries on its upper surface a block 2, a cross slide 3, and two vertical brackets 4.

The block 2 is accurately positioned on base 1' by .dowel pins 5 which extend into holes 6-in the blockfand is secured in position by bolts 7. A master block 8 seats on the upper surface of block 2, being accurately positioned relative to block 2 and the other parts of the machine by registering dowel pin 9and hole 9*, and a groove 2 in which a portion of block 8 has a close fit. Screws 10 pass through block 2 and hold ,-.block 8 in place. The master block 8 has its upper surface shaped and grooved or otherwise formed to conform to the shape Fig. 4 but withmounting shown in Figs. 4

and configuration desired in the finished I work blanks which in this particular machine are semicylindrical bearings. For

, 'Nuts 1 serve to adjust the position of slide [,3 relative to the rod 14, while an ad ustable stop 18 limits the forward movement of z aro 14. The rod- 14. with the slide 3 Se,

. sliding I Wear 8 instance any configuration of groove "3 desired in the finished bearing is formed ,in j

bu ng shoulders-'3 the surface of the master blank. 1twillof coursebe understood that the master blanks, 8 is not interchangeable with all bearings and-must be replaced byv suitably formed blocks whenever bearings of'diiferent sizes or shapes or havingdilferent forms of grooves are desired.

15 on base 1, the base portion of slide 3 and a stop late 16 attached to the rear of base 1;

;' cured to it between nuts 17 may conveniently tween a shoulder 14", formed thereon and 30 f forward movement by a lever 20 pivoted to, I v 1 the forward end-of rod 14 and having, a'cam.

surface 21 to engage a suitable bushing hi h i seated in extension 15. s 1n palrs on surfaces 23, and by being adf. The vertical 1 l vide'd with mac to .receifve- -blank adaptors f 24 .which are ,l s'lidably secured to Ithe vertical portion 3 "by screws 25 passing 'thru slots26. -Nea'r 40 be given rearward movement relative to base 1 by a spring 19 encircling the'rod 14 bethe extension 15, whilethe rod may be given portion ofslide 3 "his inedabearing surfaces- 23 the upper extremity,.of slide 3 two screw threaded rods '27 and. 28 pass thru holes in the slide andare .adjustably located by nuts 29 and 30 respectively. Rod 27 has an eye head 31 and eye 31 in which a bushing.

Therod 28 has, an eye- 32 has a loose fit.

. head ,33 with an elongated eye 33, and a .wardlythuscausing a binding contact of head 40 against the work blank and a clamping of'the bushing relative to head 31. .To

assist in returning bushing 32 to" its'normal Positionv W Cam lever 34 is-released, a

spring pressed plunger 35'is mounted the "'head 33 asshown in Fig. 4.-

Bushing 32'is bored centrally and threaded interiorly for engagement with a threaded" rod 36 which extends thru the bushing pressed to retract. rod 36and bushing 32 32 indicate g5." j'At; theloiwe'r d at -a ated e0 otherwise" suitably if Iin thefadapters 4.,

efsign d'gto permitthe head ta) Y J. is limited by sp i y ,fifo'rmed on the enter v a rabbeted or e to engage the edge of a bushingjandij-retain it in place .7 daptors when they toga r: as in accommodatingfljshortfw Enrthermo're when the adaptor are suitably 'spaced apart and the ,fod",'36}i soatljustedin the bushing 32 as jato br ng tapered surface 40 of the head 4Q n'eontact withthe inclined surfaces or edges. of the 'adap'tors- '24 when the cam lever '34" released, "actuation of the head 40 becomessemiautomatic. As the cam lever 34 presses against bushing 32 the force is transmitted by rod 36 to head 40, causing the -surface.40" toslide along the adjacent surfaces of adaptors 24,thus moving head 40 into engagement with a work blank semiautomatically or without manual operation except thru the cam lever 1 Y The work blank adaptors 24 are relatively thin blocks or plates with substantially. V shaped edges 41-suitable for supporting semieylindrical work blanks, preferably mounted justed laterally thereon with screws 25 may -'accommoda te blanks of various lengths. A

work blank -or semicylindrical bearing 42 may be'se'cured in position on edges 41 by adjustable gauges 43 and head 40 of rod 36, --the .;gaugesi43 being attached to adaptors 24 by screws 44 and 44", as shown.

The vert cal uprights 4 are horizontally bored and provided with bushings 50 thru Which a shaft 52 is slidabl-y and rotatably mounted. This: shaft maybe made in one to register with grooves 8 formed in the "mastel block. .A hand grip 56 of wood, or vother suitable material may be fastened to the free end of rod 52 v for easy manipulation of rod 52.

=At a'point which is between the uprights when the shaft is in its normal position, 52 is provided with a diametrical circular bore 57, having enlarged ends 57.

right angles. to bore 57, a substantially rec-. tangular diametrical slot 58 is formed.

Grooves 59 extend from slot 58 to the free end of shaft 52". a c

A spindle 60 is rotatably mounted in bore 57. Antifriction means cooperating with spindle 60 may consist of bearmgs, comprising a race 61, located in each opening 57 a and balls 61* interposed between the races and a shoulder -62 at one end of spindle 60, and

a tapered nut 63 suitably secured at the I *otherend thereof. A washer 64 and a nut 66"" or other means. that various types and sizes of cutters may be employed, as, desired for different sized- 65 serve to retain the spindle and its antifriction means in position in the'shaft 52.

blanks or bearings and grooves.

- veniently be carried by In assembling spindle '60, the shank is passed thru the boreof a pulley 67 haying a grooved outer surface 67 located in slot 58. The pulley may be secured to the spindle as by a set screw 68 or in any other suitable manner. By means of a belt 69 running in grooves 59 and connecting the pulley with a source of power later to be described, the cutter is rotated and caused to cut the surface of work blanks brought into' engagement therewith.

A source of power for the cutter may conthe free end of rod 52 As is shown, a flat base member 70 has an uprighti71 bored to receive the end of rod 52 to which it is secured by a pin 72 passing thru the upright 71 and a slot 73 near the end of rod 52. Grooved face pulleys 74 are mounted on pins 75 in upright 71 so as to run within grooves 59in rod 52 and to engage with belt 69.

A source of power, such as an electric motor 7 6, is mounted on an arm 77 which has pivotal engagement with base 70. A

stop screw 78 and post 78, and aspring 79 serve to adjust and maintain the arm 77 in any desired position. A grooved pulley 80 is attached to the rotating axle of the the motor and carries the belt 69, which serves to transmit rotational motion of the motor to the cutting tool 66.

To counter balance the weight of the motor 76, base 7 0, and other parts which may project on one side of rod 52, a counterweight 81 may be adjustably attached to the extended end of rod 72 on the side of rod 52 opposite such parts.

In using the above described machine to form oil grooves on. the inner surface of semicylindrical bearings, the apparatus is assembled as shown' in the drawings. master block 8 having an upper curved surface substantially the same as regards size, shape .and grooves, as is desired in the "finished bushing, is mounted where itwill be -in exact alignment with the shaft 52. The tracing pointer 54 is adjusted to or otherwise secured to the.

engage the'groove 8 in the block and is then locked in position by screws 55 and 55.

Next a bearing 42 is placed in the V shaped recesses41of adaptors 24 and guages 43 adjusted to accurately position the bearing. The head 40' is then pulled down to engage the edge of the bearing opposite the guages 43 by adjusting rod 36, nut 38, and bushing '32, and is clamped in position by cam lever 34 pressing on bushing 32.

The bearing having been thus secured in the adaptors, the slide is adjusted on rod 14 so that when cam lever 20 is moved to clamping position, the bearing will be brought into working position relative to shaft 52 and cutter 66. A cutter 66 of the desired size is secured in spindle 60. The

belt 69 is assembled with pulley 67 on spindle 60, pulley 80 of motor 76, and pulleys '7 4 of upright 71. After arm 77 which bears the motoris properly located with respect to base 70 so as to properly align pulley 80 with pulleys 74 and 67 and to give belt 69 the desired tension the apparatus is ready for operation.

Electrical energy issupplied to motor 76 and the rotational movement thereof transmitted to cutter66. v I

Theslide 3 is. moved forward and locked in the predetermined position which brings the cutter 66 into engagement with bearing 42. By manually sliding and rotating rod Y52 and thus causing pointer 54 to follow grooves 8 in the master block, corresponding grooves will be, traced out and cut on the bearing 42 by cutter 66.

It will be noted that rod 52 is free to rotate'in bushing 50 while the belt 69 is mov iing, due to the location of the belt within the circumference of the rod 52. Furthermore since the motor is mounted for movement with shaft 52, it transmits its rotational motion to the cutter 66 equally well in all positions of the shaft 52 and regardless of the movement of the rod.

After the grooving has been completed and slide 3 retracted by spring 19, the finished bearing may be removed from adaptors 24 by releasing camlever 34 and retracting rod 36 and head 40 after which another bea-ring may be inserted and the operations repeated. I

With bearings having internal diameters .of two inches or more the cutter mounting described above may be employed but when smaller bearings constitute the work blanks, a modified cutter mounting is preferred. Such a mounting is detailed in Fig. 7. Here is shown a smaller rod 85 with a bore 86 and slot 87 and having bearings 89 seated in enlargements 86 of bore 86. A spindle 90 turns on bearings 89, being held in position by pulley 91 secured thereto by a set screw 92. A screw 93 holds a cutting tool 94 in place in spindle 90 while a key and keyway 95 prevent rotation of cutter 94: relative to" spindle 90. Grooves similar to grooves 59, Fig. extend from pulley 91 tothe endof shaft 85. I

It'will be understood that for small bearings asmall shaft, ,a cutter and cuttermountings are needed, and that these parts should be enlarged somewhat when bearings oflarge sizes are to be accommodated. It'is' face equidistant from the center of'the rod' 52, the center is adpated to form grooves of uniform depth in any portion of the bearing surface. When a larger or smaller'bearing is tobe grooved it is placed on the \I- shaped edges of the adaptors and the slide 3 is adjusted on rod 14 so that the center of. curvature of the .bearing'surface coincides with the center of the shaft, when the slide ;is clamped in working position.

It is necessary, however; to use a cutter having a cutting head and shank of suf-. ficient length to engage the bearing blank and toform grooves or depressions of'the desired depth and size therein. ,.With the exception of this one replaceable unit the apparatus is equipped to form grooves ofumform depth in bearings of many dlfi'erent sizes.

While" I have'described in detail the various nartsof a specific apparatus embodying the principles of my invention, and one class of work of which it is capable I do not 'w1sh to be limited thereto, since many modifications of various parts of thedescribed apparatus as well as of the type of work it is capable of performing can be made w thout departure from the scope of the lnvention as. defined in what is claimed.

What'Iclaimis: 1. In a profiling machine for forming dc pressions in the surface of an artlcle, a base, a master block mounted on the base having depressions in its surface, a cross slide movably mounted on the base, and adapted to carry a work blank, ashaft movably sup. ported by the basejand having a pointer engaging the depressions in the master'block I I :and also having acutter adapted toengage a surface of a work blank, and means mounted on and movable with the said shaft for actuatingthe cutter to perform a cutting operation on the surface ofthe said work blankb.

2. In a profiling machine for forming ole-vv pressionsin the surface of an article, a base mounted on having uprights, a master block rotatably mounted in the shaft angles to the length thereof to engage a work. movable the base and having depressions in its upper surface, a cross slide movably mount ed on the base, and adapted. to carry awork blank, a shaft movably supported in the up rights and having a pointer adapted to move in and be "guided by the. depressions in the master block, the shaft also having a cutter. adapted to engage a surface of the work blank and to' reproduce therein the depressio'ns of the jm'aster blank when. the said tion on the surface of the said work. lank.'- 1

3. In a profiling'm-achinefor forming da.

pressions in the -surface of an ar ticle a base a semicyhndrical master block mounted on;

and adapted to carry a semicylindrical work the base and having depressions in'its surface, across slide movably mounted on the base, j

blank, a shaft movably supported by the base and having a pointer engaging the depressions in the-master block and also havingai cutter adapted-to engage the inner'surface of a work blank, and-means mounted on and movable with the said shaft foractuating the cutter to perform a cutting operation on 7 the surface of the said work blank.

4. In a profiling machine forforming dcpressionsin the surface of an article, a base, a semicylindrical master block mounted on the base and having depressions in its vin- I i ner surface, a cross slide movably-mounted in the base, and adapted: to carry a-semicy; 00

lindrical workblank, a shaft movably supported by the base and having a pointer-- adapted to move in and be guided by thefde:

pressions in the master block, the shaftalso having a cutter adapted to engage the inner surface of a work blank and to reproduce therein the depressions of the master block when the shaft isguided thereby,'and means mounted on and movable with the said shaft for actuating the cutter to perform a cutting work: blank. i .v

5. In a profiling machine for forming-de pressions in the surface of an article, a base,-

a cross slide movably mounted on the base.

and adapted to'carry .a work blank, a sh af't supported by the base for rotational and lateral movement relative thereto, a cutter blank, and means mounted on and and at right. I

6. In a profiling machine for formin" depresslons 1n the surface of. an article, a ase,

a cross-slide movably mounted on the base, and adapted to carry a work blank, a shaft supported by thebase. for rotational and lateral movement relative thereto, a cutter v rotatably mounted in the shaft and at'an angle to the length thereof to engage a work blank, power means mounted on and movoperation on the inner surface of thesaid f able with the'said'shaft-and ing the power means with the cutter and surface of the said work' b ank.

passing within the outer circumferenceljof the shaft.- ffif 7. In a profiling machine'for forming; de pressions in the surf'ace'of an article,a base; j

having two, uprights and a cross slide guide located there between, a master block mounted on the base and having depressions inits surface, a cross slide mountedon the said guide and adapted tohold a Work blank, a

shaft movably supported by the base and operation onfthe surface'ofthe said work blank. I i

' 11; In a profiling-machine for forfnin depressions in the surfaceofan article, a ass,

a. cross slide movably mounted on the base,

and adapted to carry afworkblank, a shaft movablyi'supported by-the base and having a blank, the shank of; theeutterbeing rotatacutter adapted to engage a surface of a work l bly mountedwithjin' the circumference of the shaft and being connected .to and actuated having a pointer engagin the depressions by means also located-within the circumference' of :theshaft; andmeans mounted on' in the master block and a so having a cut ter adapted to engage a surface of t e work blank, and means mounted on=andmovable with the said shaft'for' actuating the cutter to perform a.cutting o eration on the 8. In a profiling machine for forming depressions in the surface of an arti cle,'a base having two uprights and a cross slide guide located therebetween, a master block mounted on the base and having depressions in its surface, a cross slide mounted on the said guide and'adaptors carried thereby for hold- 7 ing a work blank, a shaft movably supported by the base and having a pointer engaging the depressions in the master block and also having ,a cutter adapted to engageasurface of the work blank, and means mounted on and movable with the said shaft for actuating the cutter to perform a cutting operation 1 on the surface of the said work blank. 9. In a profiling machine for forming depressions in the surface of an'article, a base having two uprights and across slide guide located therebetween, a masterblock mounted on the base having depressions inits surface, a cross slide mountedon the said guide an adaptor carried thereby for seating a work blank and adjustable means carried by the cross slide for securing a work blank in the adaptor, a shaft movably supported by the base and having a pointer engaging the depressions in the masterblock and also having a cutter adapted to engage a surface of the work blank, and, means-mounted on and movable with the said. shaftfforactuating the cutter to perform a'cutting operation on the surface of the said work blank. I 10. In a profiling machine'for formingdepressions in the surface of an article, a base; a master block mounted on the base and hav ing depressions in its surface, a cross slide movably mounted on the :base, and adapted to carry a work blank, a shaft movably supported by the base and'having a pointer env the circumference of the shaft, and means mounted on and movable with the said shaft 7 .and:movable with the said: shaft for actuating the cutter to perform'a cutting opera-v base, and'adapted to carrying a'work blank. a shaft movably supported by the base and having'j'a rotatable cutterw extending at an angle to the longitudinal center line of the I shaft, said cutter being adapted to engage a surface of a work blank, -the shankof the cutter'andits mounting being located within the circumference "of the said shaft, and

means mounted on and movable with the said shaft for actuatingthe cutter'to perform a cutting operation on the surface, of

the said work blank.

13. 111 2. profiling machine for forming depressions 'm-wthe surfaceof an article, a. base, a cross sl de movably mounted on the base, and adapted to carry a work blank, a shaft-movably supported by "the base and having recesses, means mounted in, certain of the recesses for rotatably'securing a cutting tool and means, operable in certain of the recesses for rotating ithe'said cutting tool, and means mounted on and movable with the said shaft-for actuating the cutter to perform a cuttingloperation. in the face of the said work blank.

v 14, In a profiling-machine for forming depressions in, the surface of an article, a base, a cross slide movably mounted on the base, and adapted to carry a workbla-nk, a shaft movably supported by the base and having recesses, a cutting tool rotatably ire mounted in certain of the said recesses to engage the work blank, power means mount-' ed on and movable with-the said shaft and means connecting-the power means and the cutting tool fand movable in certain of the said recesses for. transmitting rotational movement of the power means to the cutting tool irrespective of the movement of the-shaftj v 15. In a profiling machine forforming depressionsflm the surface of an article, a base,' a cross slide movably mounted on the base, and adapted to carry a work'blank, a shaft movably supported by thebase and gage a.work blank and a motor mounted on and movable with the shaft, and belt connecting the motor and the cutting tool and movable in certain of the said recesses whereby rotational movement of the motor may cause rotation of the cutting tool irre" spective of the movementor positioniof the said shaft.

16. In a profiling machine for forming depressions in the surface of an article, a

cutting tool rotatably mounted in the. said 7 shaft, and power means connectedto the said base, a cross slide adjustably mounted on the base, an adaptor secured to; they-cross slide and having a substantially shaped surface for mountin semicylindrical work blanks of different sizes, the said V shaped surface and cross slide cooperating to adjust the center of curvature of a work blank held thereby to a fixed positioma shaft sup-- ported by the base and carrying a rotatable cutting tool for engagement .withthe inner surface of the said work'blank, and means mounted onand movable with the shaft for rotating the said cutting tool. 1 Q

17. In a machine of theclass described in combination, a base having .a cross slide guide adjacent one end thereof, brackets secured to the base on either side of the said guide, a shaft longitudinally and rotatably' mounted in the said brackets, a cutting tool rotatably mounted in the said shaft betweenthe said bracketsand adapted to engage a work blank carried by the said cross slideand means within the shaft for actuating the cutting tool while permitting unrestricted movement of the saidshaft.

18. In a machine ofthe class described in combination, a base, a master block secured thereto adjacent one end,and having' depressions in its upper surface, a cross-slide guide in the base adjacent the oppositev endthereof, a cross slide adapted to carry a work blank and slidably mounted in the said guide, brackets secured to the said base on either side of the guide, a shaft mounted in the said brackets for rotational and longitudinal movement, a cutting tool mounted in the shaft between the said brackets and adapted to engagewith a work blank carried by the said cross slide, a tracing pointer carried by the said shaft adjacent the said master-block, and means for rotating the said cutting tool in all positions of the said shaft.

19. In a machine of the class described in combination, a base, a shaft movably mounted thereon, a work blank carrying member movable into and out of ,Working position with respect tothe said shaft, a cutting tool carried by the shaft andmeans Within the shaft for rotating the said cutting tool in all positions of the said shaft. I

20. In a machine of the class described in combination, a base, a shaft movably mou'nt-' ed thereon, a cam operated member slidably secured to the said ifisey a motor" bracket- 7 carried bythe said shaft, a cutting tool rota'-- tablymounted in the shaftand adapted to the said cutting tool while permitting unre;

stricted movement of the saidshaft.

' 121. In amachine of the class described in combination, a-base, a shaft mounted thereon for longitudinal and rotational movement, a I

shaft. Y

1 22. A machine comprising in combination, f

a base, when mounted thereon for. rota tional and longitudinal movement, a cutting tool projecting from the side thereof, power means'forrotating thesaid cutting'tool with-' rout restricting movement ofthe said shaft and a counter weight adjacent one end of the said shaft for automaticallyireturning'.-

the shaft to a predetermined posltion. p

'23. In. a device of the class described, a

base, a manually operable shaft mounted thereon for longitudinal and. rotational" movement, a tracing pointer carried by the shaft and adapted to engagea master block,-

means .for rotating t e said cutting tool in all 24. In a a rotatable cutting tool carried by-the shaft; and adapted to en age a work blank and ing from one sideof the said shaft, means 3 carried by'the shaft for rotating the saidcutting tool, a member slidably mounted on the blank on the said member, andmeans for moving the said member to bring the work blank into engagement with the said cutting tool.

combination, brackets having aligned open ings, a shaftmovably mounted therein, a transverse bore-in the said shaft, a cutting grooves-extending from the said bore to one end of the said shaft and means for rotating the said cutting tool comprising a motor mounted on the said shaft adjacent the open said baseand adapted to-re'ceivethe work I 25. In a device of the class described in i tool rotatably mounted in the said bore,'

.i za

ends of the said grooves and a belt connect-.

ing the motor t0 the cuttin tool and adapted to move within the sai 'groovesp- 26. In a device of the class described.v in

combination, a shaft mounted for unrea stricted, longitudinal and rotational m'ovement, a bore extending transversely through the sa d shaft, a cutting tool rotatably mounted inthe said bore, longitudinal grooves in opposite sides of the said shaft extending from the said bore to one-end of the shaft, a pulley secured'to the said cutting tool and aligned with the said grooves, a motor securedto the shaft, and a belt adapted to connect the said motor with the said pulley and to lie Within the said grooves. Y

27. In a combination, a shaft mounted for endwise and rotational movement, a transverse bore in the shaft, opposite grooves extending. from adjacent one end of the said shaft to 15 the said bore, a cutting tool rotatably device of the class described, in.

mounted in the said bore and having a pulley secured. thereto in" alignment with the said grooves, a bracket mounted on the shaft and'having pulleys in alignment with said grooves, a power mechanism mounted on the said bracket and a belt connecting the said mechanism and the said cutting tool pulley and engaging the pulleys in the said bracket, whereby the said belt lies Within the said grooves from adjacent one end of the shaft to the cutting tool.

In testimony whereof, I hereunto aifix my signature.

' HENRY HOOK.

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