US2116243A - Chuck - Google Patents

Description

R. W. JOHNSON CHUCK Mgy 3, 1938.

Filed NOV. 19, 1936 '3 Sheets-Sheet l.

May 3, 19%- l. R. w. JOHNSON 2,116,243

CHUCK Filed Nov. 19, 1936 3 Sheets-Sheer, 2

May 3, 1938. R. W. JOHNSON I CHUCK Filed Nov. 419, 193e 5 sheets-sheet 5 IIJ @fyi

Patented May 3,1938 y l 2,116,243

UNITED STATES PATENT OFFICE CHUCK Ray W. Johnson, Chicago, Ill.

Application November 19, 1936, Serial No. 111,660

10 Claims. (Cl. 242-68) This invention relates to chucks, and is parating mechanism of the chuck in order to effect ticularly concerned with chucks of the type securement. adapted to be employed in combination with a Another object of the invention is the provision shaft for holding rolls of paper or other materials of an improved chuck of the class described which which are to be mounted on a shaft for wrapping is adapted to be quickly and easily released by 5 or unwrapping. means of a special tool.

The devices of the prior art are subject to the Another object is the provision of an improved disadvantage that the engaging jaws -have an chuck of the classdescribed which is adaptable axial movement with respect to the shaft on for use on either end of the paper roll or shaft which the roll is mounted, and thus it is freand which is sturdy, economical, and capable of 10 quently found that after the roll has been semanufacture with a minimum amount of macured in place the paper is out o alignment with chine operations. Y the other mechanism of the press or other ma- Other objects and advantages of the invention chine in which the paper is used. will be apparent from the following description One of the objects of the invention is the proand the accompanying drawings, in which similar 15 vision of an improved chuck for paper rolls or the characters of reference indicate similar parts like in which the engagingjaws do not have an throughout the several views.

axial movement with respect to theV 'roll which Referring to the three sheets of drawings acthey secure and engage, thereby assuring the secompanying the specification,

2b curement of the roll in aligned position, once it Fig. 1 is a fragmentary diagrammatic view of a 20" is moved into that position. pair of chucks constructed according to the in- The devices of the prior art are also subje vention, mounted on a roll supporting shaft, to the disadvantage that the jaws are actuated byV showing the usual mode of use 0f Such Chucks; rotatable threaded members, and the threaded Fig. 2is a fragmentary vertical sectional view,

' parts of those chucks `have to be so arranged with taken through the mechanism of Fig, 1, on the 25 a left handand a right hand thread that they plane 2 2 of Fig. 6, passing through the axis will be tightened by the rotation of the shaft. of the shaft;

However, such devices are frequently loosened Fig. 3 isa sectional view, taken on the plane when the shaft is temporarily rotated in the of the line 3.3 of Fig. 1, looking in the direction 3G other direction, or the mechanics may become of the arrows, and showing the jaw securing 30 confused in the assembly of the devices so that mechanism; g the threads may be wrongly arranged. Fig. l` is a vertical sectional view, taken on Another object of the invention is the provithe plane of the line 4 4 of Fig. l, looking in sion of an improved chuck for paper rolls or the the direction of the arrows, showing the means like which does not require any right hand or left for moving the jaws into engagement with the 35 hand threaded members, so that the chuck is not interior of the roll;

loosened by rotation in the opposite direction Fig. 5 is an elevational view of a combination and there is no possibility of assembling the wrench and chuck-releasing tool; chuck with the shaft in the wrong way. Fig. 6 is a sectional View, taken on the plan 40 Another object of the invention is the provision of the line 6-6 of Fig. 1, looking in the direction 40 of an improved chuck of the class described, the of thearrows, showing the means for securing jaws of Awhich are adapted to be brought into the chuck tothe shaft;

tight engagement with the interior of a paper Fig. 7 is a View in perspective of the mecharoll by the peripheral motion of certain parts nism with the jaw retaining housing and the rather than the axial motion thereof, thereby asjaws removed;` i 45 suring the alignment of the roll after the chuck Fig. 8 is a view in perspective of the jaw reis secured to the roll.` taining housing, partially broken away to show Another object of the invention is the provithe groove for the jaw flanges; and sion of an improved chuck of the class described,v Fig. 9 is. a `view in perspective of one of the which has means for securing the jaws inv any of jaws of the chuck, shown in such a position rela- 50 a plurality of predetermined positions, which setive to Fig. 8 as to permit its ready insertion.

curing means is adapted to elfectV the secure- Referring to Figs. l and 2, Hl indicates in its ment of the jaws upon relatively small steps of entirety one chuck, and Il the other chuck,

movement so that there is` little or practically mounted on a shaft i2 for the purpose of securing V no backlash or backward movement of the actua roll of paper I3 to the shaft. The shaft l2 is 55 rotatably mounted in the bearings I4, I5, and is adapted to be removed from the bearings for the purpose of passing the shaft through the cylindrical core I6 upon which the paper of the roll I3 is usually wound. It will be observed that j the chucks I and II are oppositely disposed on the shaft I 2, but otherwise these chucks are identical in construction and interchangeable so that there is no possibility of wrong assembly of the chucks with the shaft.

Referring to Figs. '1 and 8, I shall now describe one of the chucks in detail. The chuck preferably includes a plurality of jaws I1 of identical construction, and any number of jaws may be used, but I prefer to use three separate jaws in the preferred embodiment, and have numbered them I1, I8, and I9 in Figl.

Each of these jaws comprises an elongated cast metal member which is curved like part of a cylinder, and which is provided at its end with the retaining flanges 20. The outer surface 2| of each jaw may be substantially cylindrical, and it may, if desired, be provided with a plurality of grooves 22, giving the outer face 2| of the jaw a serrated surface, but I have found such serrations are not necessary.

The cylindrical surface 2| is substantially complementary to the cylindrical bore 23 on the inside of the cardboard core IB of the paper roll I3, but each jaw covers less than one-third of the periphery of the interior of the core I6 so as to permit enough clearance so that the jaws may contract and expand within a core I6.

The inner curved surface 24 of each jaw is not cylindrical, but diverges from the cylindrical for'n'i'by curving farther inward at the point 25 than its location at the point 26; that is, the jaw is made thicker at the top of Fig. 9 than it is at the bottom of Fig. 9, and thus the inner surface 24 is a camming surface, the upper portion of which in Fig. 9 is disposed at a lesser radius from the center of the shaft than the lower portion.

Each of the jaws |1-I9 is also provided with an alignment flange 21, comprising a radially extending flange located on its outer surface 2| at a point slightly spaced fromrthe jaw supporting housing 28, and adapted to engage the end of the paper roll I3. This ange determines the position of the jaws in the core I6 of the paper roll.

The retaining flange 20 may comprise an integral radially and outwardly projecting flange, having a straight outer edge 29, and provided at each end with a thickened column 30. The thickened column portions 30 are of such thickness that they t within the grooves 3|, which are formed in the jaw supporting housing.

The jaw supporting housing 28 comprises a part of the chuck head 32. It is a cast metal member of annular shape, having two flat annular end walls 33, 34 joined by a fru'sto-conical side Wall 35. The end wall 33 has a bore 36 which is of sufficient size to pass the camming member 31 (Fig. 7) to facilitate assembly with that part. The end wall 34 has a larger bore 38, the size of these bores differing by an amount which is equal to the largest thickness at the point 25 of a jaw 24. Between the annular end walls 33 and 34 there is located rthe groove 3|, this groove being divided intothree separate pockets 3| by the equally spaced partitions 39.

The retaining anges 20, with their enlarged portions 39, are adapted to fit in the grooves or sockets 3|, radial movement being permitted, the

enlarged portions 30 slidably engaging the walls of the sockets 3|.

A portion of the frusto-conical outer wall 35 is cut away at 40, so that when this part of the housing is assembled with the other part 4|, which comprises a ratchet housing, there is an aperture 42 for the passage of a force-multiplying lever 43.

The chuck-retaining housing is provided with a laterally projecting cylindrical wall 44, serving as part of a housing for the ratchet mechanism, and it is provided with screw supporting lugs 45, located to be aligned with similar screw supporting lugs on the ratchet housing 4| (Fig. 7). Screws passing through the ratchet housing 4| and threaded into bores in the jaw retaining housing 28 secure these two parts together to form the chuck head.

Referring to Fig. 7, the chuck is preferably provided with means for positively securing the chuck head 32 to the shaft I2, comprising the relatively heavy cylindrical extension 46, forming a collar which is separated from the housing 4| half-way as by a groove 41.

Collar 46 is also split radially at the slot 48 (Fig. '1), and the two legs 49, 5l) are joined by a threaded member 5I, located in the bore 52 and threaded into an aligned bore in the leg 56. Threaded member 5| has a non-circular socket 53 for reception of the non-circular (hexagonal) bent end 54 of the wrench and releasing tool 55 (Fig. 5). By means of the collar 46 it is possible to clamp each chuck in proper position 0n the shaft I2 simply by driving the threaded membery 5| home into a threaded bore in the leg 50.

The housing member 4| is provided with a radially extending supporting flange 56 and with an outer cylindrical flange 51, the latter being also cut away at 58 at a point which registers with the cut-away portion 40 of the housing 28. This housing member is provided with a cylindrical bore 59 for receiving the shaft I2, and it is secured to the housing member 28 by a plurality of screw bolts 60 (Fig. 3). The flange 56 is provided with apertures for receiving the spring supporting pins 6|, 62. It is also provided with an aperture for receiving the pivot pin 63 for a plurality of pawls 64-51. The pins 6|-63 may have a sliding t in the bores in the flange 56, and also a sliding fit in similarly located bores in the flange 33 of the housing member 28.

Flanges 56 (Fig. 7) and 33 and 34 (Fig. 8) are each provided with the through bore 68 to permit passage of the cylindrical end 69 (Fig. 5) of the chuck releasing tool from either side of the chuck head, although the tool can only be inserted from the left of Fig. 1 when a roll is on the chuck. 'I'he action of this tool will be described in detail later.

Each of the pawl members 64-61 is of the same shape, but the pawls are successively longer, as shown in Fig. 3. Each pawl comprises a steel member which is provided with an inwardly projecting tooth 69 at one end, a bearing aperture 10 between its ends, and with a grooved tail 1| at the opposite end. The groove in the tail 1| is located on the inner side in Fig. 3, as shown by the dotted lines at 12, and is adapted to receive one end of the longer arm 13 of a spring 14.

The pawls are pivotally mounted on the pin 63 for engagement with the teeth 15 of a ratchet sector 16. Only one pawl actually engages a tooth at one time, but the pawls being of successive length, all within the spacing between two teeth, it `will be observed "that the .sector 1,6 may be engaged by any one of the four pawls, depending on its position, and thus the iincrements of movement and points of `securlement of the sector 16 are varied by extremely small spaces, differing only by the difference in length of the pawls 641-61.

Each of the springs 14 comprises a relatively long arm 13, a coiled portion 11 Ycoiled about the pin 6|, .and afshort arm 18 engaged outside `of the pin 62.

The springs are placed under such tension `that they pivot the pawls in a counter-clockwise ,drection in Fig. 3, to urge them into r`engagement with the ratchet sector 16. They may :be moved out of engagement with the tooth ;15 of the ratchet sector 15 by the camming action of the frusto-conical end 19 of 'the tool 55 when thrust into the bore 68, from either end of the head.

The tool is. to be inserted in Fig. 43, the cylindrical portion 69 engaging the tails 1I of all of the pawls `(i4-61, and holding `them out of engagement.' `This shows the action of the tool in releasing the pawls from the ratchet sector so that the clutch may be released when the tool is removed, the pawls `automatically engaging the teeth.

Referring to Fig. 1, the chuck is provided with a camming member .31, comprising a substantially cylindrical `or tubular cast metal member which is provided with a multiplicity of integral camming formations 88. The camsl are merely ribs or thickened portions on the cylindrical wallof the tube 31, and it will be observed that at the cams 88 this wall increases in thickness in a clockwise direction in Fig. "1.

The cams 88 are preferably 'located `at equally spaced points along the length ofthe tubular member 31 and arranged at equally spaced points about its periphery. In the present oase, where three jaws are used, three series of cams 80 `are equally spaced about the periphery of the vcamming member 31 and located to engage the jaws l1-I9. The endmost cam 80 is provided with a tapered surface 8! to facilitate the insertion of` this camming member through the `bore in the housing member 32.

The camming member 31 is provided with a cylindrical bearing flange 82 at its left end (Fig. 7). the bearing ange 82 fitting within the bore 36 (Fig. 8) for rotatable support of the camming member in the housing. The camming member is also provided with an enlargement or head 83, which has a radially extending body 84 provided with an aperture 85 that is rectangular in cross section so asto receive the rectangular bar 43.

The rectangular bar 43 may be of considerable length, as, for example, 12 to 18 inches, so as to permit considerable force to be applied to the rotation of the camming member 31. Lug 84 is provided with a pair of outwardly projecting lugs 81 and 88, which are of the same thickness as the bar 43, and which are adapted to project between the edges 58 and 40 of the cut-out portions of the housing. Camming member I31 is provided with a cylindrical bore 8S for receiving the shaft l2, and this bore is split by a slot 90, which extends throughout the effective length of the tubular member 31. The bore 89 communicates with a counterbore 86 at the end flange 9i of the camming member, and counterbore 86` is adapted toy receive an inwardly projecting cylindrical bearing flange 92 carried by the housing 4member' :(H, providing another bearing for the head 83 of the camming member 31.

.'leadfB ofthe camming member 31' is provided with ,aperipherally extending groove `93 (Fig. 2), ,which `extends over approximately one-third of the 'periphery of the head, `and which is adapted .torreeeive the ratchet tooth sector 1.6 of complementary shape.

.'.Ihe ratchet tooth sector 16 comprises a curved member, Eh'aving a radially, inwardly extending lug :94, which extends into bore 95 in the tubular member 31. Lug 84 is adapted to bear the major portion of the load on the ratchet tooth sector 16, and positively prevents rotation of this sector with respect to the camming member 31, but the ratchet member is secured in place by a plurality of through 4screw bolts 95, which are threaded into the flange 9|.

The method of assembly of the parts is as follows: The tool 55 may have its end 89 inserted in the bore 68 of the housing member 4i, and the pawl members 54--81 may then be assembled on this housing member, with the springs and pins. The vthree jaw members |1-i9 may be inserted with their fiangesLZil in the sockets 3l of the housing member or .collar '28. The camming member 31 may then be inserted between the jaws i1l9 and ,rotated until the lugs 81, 88 are located in the groove 42. The housing members 4l and 32 may then be placed together, with the bores that receive the screw vbolts Si! in registry, and they may be secured together by the screw bolts.

Thereafter the tool 55 may be removed to permit the pawls Sil-51 to come into engagement with the ratchet sector.

The use and operation of the chucks is described as follows: The shaft I2 is inserted through the core I5 of a roll of paper, `with a chuck HJ, lil at each end of the roll. The jaws i 1 19 of each chuck are inserted into the core I6 until the liange 21 engages the end of the core, and the collar 45 or" each chuck is secured in place by the threaded member 5 I, which draws the legs 49, 5i) of the collar together and clamps the collar on the shaft in the position of Fig. 1. The roll lf3 is then secured on the shaft by means of the chucks, as follows:

A bar 43 is inserted in its socket 85, and the camming member 31 is rotated by moving the bar downward in Fig. '1; that is, in such direction as to rotate the cams 88 counter-clockwise in Fig. '7. `The thickened portions of the cams 80 come into engagement with the thickened portions of the jaws I1-I8 simultaneously, and effectively spread the jaws i'l--i' into engagement with the core HS. As the camming member 31 is rotated, the pawls ld-81 are constantly urged toward the teeth 15, and one of the pawls is always in position to engage one of the teeth'. The camming member 31 will be held by the pawls 64 in substantially the position to which it is moved, with only a minimum` amount of back movement or backlash, amounting to the difference in length between successive pawls (547-61. The roll having once been aligned with the press or other mechanism with which it is being -used by location of the chuck lil, it cannot get out of alignment by any action of the chucks because the chucks merely spread their jaws radially and do not slide longitudinally of the roll.

Both chucks are identical in construction, and there is no possibility of wrong assembly of the chucks with the shaft, and since there are no tation of the shaft, the securement of the roll by the chucks is assured at all times.

The chucks do not depend solely on the collars 46 for their securement to the shaft because this securement is augmented by the spreading action of the cams Sii and jaws ll-ES, which acts on the split sleeve 31 to compress that sleeve into closer engagement with the shaft l2. The chuck thus has the complete length and full internal area of the sleeve 3l, as well as the collar 46, for frictional engagement with the shaft l2 to secure each chuck to the shaft. v

The securement of the chuck to the paper roll effectively secures the chuck more tightly to the shaft. After the roll has been secured by means of a chuck at each end, the bar 43 is, of course, removed. The chuck may be released at any time by merely forcing the conical end 'i9 of the tool 55 into the bore S8. The conical end 'i9 cams the pawls 64-67 out of engagement with the sector 'i6 and releases the chuck. This may be made easier by inserting the bar i3 and relieving the pressure on the teeth at the same time the tool 55 is inserted. The insertion of the tool 55, however, permits the camming sleeve 3l' to be rotated to released position at once so that the chucks immediately release the roll.

It will thus be observed that I have invented a ne-w chuck for use in securing paper rolls or the like to a shaft.

The present chuck is quick and positive in its action and, as stated before, it is not loosened by any rotation of the shaft. Its parts comprise castings which require a minimum amount of machining, and it may, therefore, be constructed at a very low cost. The chuck facilitates the alignment and securement of the roll in proper position, and the action of securing the paper roll by the chuck does not change the alignment of the roll.

While I have illustrated a preferred embodiment of my invention, many modifications may be made without departing from the spirit of the invention, and I do not wish to be limited to the precise details of construction set forth, but desire to avail myself of all changes within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patend of the United States, is:

l. In a chuck for securing a hollow member to a shaft, the combination of a supporting head with a rotatable camming sleeve adapted to be mounted on the shaft, a plurality of jaws extending longitudinally of the shaft and locatedtoutside of said sleeve, said jaws and sleeve comprising camming means operating between said jaws and said sleeve by the rotation of said sleeve for spreading said jaws into engagement with a hollow member to be secured to the shaft, pawl and ratchet means carried by said head and sleeve for securing said sleeve in any of a plurality of predetermined rotative positions, and means for slidably engaging said pawl means to release said pawls from the ratchet and effect a release of the chuck, said latter means comprising a tool having a camming end adapted to be inserted in a bore in said head.

2. In a. chuck for securing paper rolls or the like to a shaft, the combination of an annular head provided with a bore extending through the same, a sleeve rotatably mounted in said bore and having peripherally extending camming means on its outer surface, and a plurality of jaws having parts thereof expansively mounted in said head, said jaws having camming formations on their inner surfaces whereby rotation of said sleeve spreads said jaws into engagement with a member to be fastened to a shaft, said head having inwardly open, curved sockets, and said jaws having outwardly extending iianges for engagement in said sockets.

3; In a chuck for ksecuring paper rolls or the like to a shaft, the combination of an annular head provided with a bore extending through the same, a sleeve rotatably mounted in said bore and having peripherally extending camming means on its outer surface, and a plurality of jaws having parts thereof expansively mounted in said head, said jaws having camming formations on their inner surfaces whereby rotation of said sleeve spreads said jaws into engagement with a member to be fastened to a shaft, said sleeve being provided with ratchet teeth adjacent said head, and pawl means in said head for securing said sleeve in any of a plurality of rotative positions.

4. In a chuck for securing paper rolls or the like to a shaft, the combination of an annular head provided with a bore extending through the same, a sleeve rotatably mounted in said bore and having peripherally extending camming means on its outer surface, a plurality of jaws having parts thereof expansively mounted in said head, said jaws having camming formations on their inner surfaces whereby rotation of said sleeve spreads said jaws into engagement with a member to be fastened to a shaft, said sleeve being provided with ratchet teeth adjacent said head, and pawl means in said head for securing said sleeve in any of a plurality of rotative positions, said pawl means comprising a plurality of separately movable pawls having engaging teeth located within the space between two adjacent ratchet teeth.

5. In'a. chuck for securing paper rolls or the like to a shaft, the combination of an annular head provided with a bore extending through the same, a sleeve rotatably mounted in said bore and having peripherally extending camming means on its outer surface, a plurality of jaws having parts thereof expansively mounted in said head, said jaws having camming formations on their inner surfaces whereby rotation of said sleeve spreads said'jaws into engagement with a member to be fastened to a shaft, said sleeve being provided with ratchet teeth adjacent said head, and pawl means in said head for securing said sleeve in any of a plurality of rotative positions, said head having a transverse bore locate-d adjacent the pawls, and means slidably mounted in said bore for moving the pawls out of Aengagement with the adjacent ratchet teeth.

6. In'a chuck for securing paper rolls or the like to a shaft, the combination of a supporting head adapted to be iixedly secured to a shaft, with a split sleeve adapted to be rotatably mounted on said shaft and rotatably mounted with respect to said head, said sleeve having a plurality of cams and being provided with parts adapted to clamp the shaft, a plurality of jaws having parts thereof movably mounted on said head for engaging the interior of a paper roll, and means for rotating said sleeve, whereby said jaws are expanded to engage the paper roll and the sleeve is contracted to engage the shaft, a ratchet carried by said sleeve, said sleeve having means for securing it selectively to the head in any of a plurality of adjusted positions, comprising a multiplicity of pawls located with their engaging shoulders at increments of distance from each other which are less than the distance between the teeth of the ratchet.

7. In a chuckfcr securing paper rolls or the like to a shaft, the combination of a supporting head, said head having an inwardly open annular groove and having aV sleeve rotatably mounted on said head, with a plurality of curved jaws extending longitudinally of said sleeve and exterior` thereof, said curved jaws having flanges slidably mounted in said annular groove, said groove and flanges being of sufficient size to permit radial movement of said jaws, camming formations on said jaws and sleeve increasing in size in a peripheral direction, whereby when the sleeve is rotated the jaws will be expanded to engage the paper roll, and means for securing the sleeve in predetermined position with respect to the head, comprising a ratchet carried by said sleeve and a pawl carried by said head, said sleeve having a slot extending over the major portion of its length, whereby the sleeve may be urged into closer engagement with the shaft by the action of the camming means.

8. In a chuck for securing paper rolls or the like to a shaft, the combination of a supporting head, said head having an inwardly open annular groove and having a sleeve rotatably mounted on said head, with a plurality of curved jaws extending longitudinally of said sleeve and exterior thereof, said curved jaws having flanges slidably `mounted in said annular groove, said groove and anges being of suiiicient size to permit radial movement of said jaws, camming formations on said jaws and sleeve increasing in size in a peripheral direction, whereby whenthe sleeve is rotated the jaws will be expanded to engage the paper roll, and means for securing the sleeve in predetermined position with respect to the head, comprising a ratchet carried by saidV sleeve and a pawl carried by said head, said 'sleeve having a slot extending over the major portion of its length, whereby the sleeve may be urged into closer engagement with the shaft by the action of the camming means, said head com` prising a pair of circular parts, and said sleeve having an annular portion projecting radially therefrom secured between said parts for rotative movement.

9. In a chuck for securing paper rolls or the like to a shaft, the combination of a supporting head, said head having an inwardly open annular groove and having a sleeve rotatably mounted on said head,rwith a plurality of curved jaws extending longitudinally of said sleeve and exterior thereof, said curved jaws having flanges slidably mounted in said annular groove, said groove and flanges being of sufficient size to permit radial movement of said jaws, camming formations on said jaws and sleeve increasing in size Vin a peripheral direction, whereby when the sleeve is rotated the jaws will be expanded to engage the paper roll, and means for securing the sleeve in predetermined position with respect to the head, comprising a ratchet carried by said sleeve and a pawl carried by said head, said sleeve having a slot extending over the major portion of its length, whereby the sleeve may be urged into closer engagement withthe shaft by the action of the camming means, said sleeve having a radially extending lug provided with a handle socket and an elongated handle in said socket for rotating said sleeve.

10. In a chuck for securing paper rolls or the like to a shaft, the combination of a supporting head, said head having an inwardly open annular groove and having a sleeve Vrotatably mounted on said head, with a plurality of curved jaws extending longitudinally of said sleeve and exterior thereof, said curved jaws having iianges slidably mounted in said annular groove, said groove and flanges being of sufficient size to permit radial movement of said jaws, camming formations on said jaws and sleeve increasing in size in a peripheral direction, whereby when the sleeve is rotated the jaws will be expanded to engage the paper roll, and means for securing the sleeve in predetermined position with respect to the head, comprising a ratchet carried by said sleeve and a pawl carried by said head, said sleeve having a slot extending over the major portion of its length, whereby the sleeve may be urged into closer engagement with the shaft bythe action of the camming means, said head having a shaft-engaging collar provided with split ends, and threaded means for drawing said split ends together to clamp said head to said shaft.

RAY W. JOHNSON.

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