US2218576A - Machine for use in the manufacture of shoes - Google Patents

Description

Oct, 22, 1940. I J. B. HADAWAY MACHINE FOR USE IN THE MANUFACTURE OF SHOES Filed July 50, 1937 3 Sheets-Sheet l Oct. 22, 1940. J. B. HADAWAY MACHINE FOR USE IN THE MQNUFACTURE 0F SHOES Filed July 30, 1937 3 Sheets-Sheet 2 A/VENTU/P' Oct. 22, 1940. HA A 2,218,576

MACHINE FOR USE IN THE MANUFACTURE OF SHOES Filed July 50, 1937 3 Sheets-Sheet 3 WVEA/TUF /5 hm 2x27" Patented Oct. 22, 1940 PATENT OFFICE "MACHINE FOR use IN THE MANUFACTURE oF SHOES j John B. Hadaway, .Swampsoott, Mass, assignor to United Shoe Machinery Corporation, Borough of Flemington, N J a corporation of New Jersey Application July 30,1937, Serial No. 156,560

16 Claims. (01. 12-17) This invention relates to machines for use in the manufacture of shoes and is herein illustrated and described as embodied in a machine forrubbing the stitches of an outsol'e and for roughing the channel surfaces preparatory to applying cement to the channel to facilitate adhesion of cement when .the channel lip is laid. The illustrated'machine represents an improvement upon the machine disclosed in United States LettersPatent No. 1,217,595, granted February 2'7, 1917 upon my application and it includes features disclosed and claimedin United States Letters Patent No. 2,004,109, granted June 11, 1935 upon my application, United States Letters Patent No. 2,087,238, granted July 20, 1937 upon application of Charles G. Brostrom, and an application for United States Letters Patent-Serial No. 125,608, filed February 13, 1937 in the name of Arthur S. Johnson.

It is an object of the present invention to provide improved instrumentalities I for roughing channels and for rubbing stitches and also to provide an improved machine equipped with such instrumentalities and organized to enable them to perform their respective functions simultaneously. In accordance with a feature of the invention, the illustrated machine is'provided with a pair of roughing tools constructed and arranged to operate, respectively, upon a channel base and a channel lip, and a stitch-rubbing tool positioned between the roughing tools. As illustrated, the roughing tools consist of rotary brushes and the stitch-rubbing instrumentalities are toothed members oscillated in such a manner as to bring them into rubbing engagement with the stitches. These stitch-rubbing members are oscillated in orbital paths which are elongated in the direction of feed of the work. The stitch-rubbing members engage the stitching alternately, Zone of them always being in engagement with v the stitching.

In accordance with a further feature, each of the above-mentioned roughing tools, as herein illustrated, consists of an improved roughing brush comprising a plurality of sectors each having an abrasive periphery, a disk having a. plurality of radial guideways in which the sectors are mounted, and a rotary cam mechanism "for adjusting the sectors inwardly and outwardly of the guideways. These'brushes in the illustrated machine are frusto-conical in form, having their end faces of larger diameter adjacentto each other, the end face of the'brush which operates on the channel basebeing greater in ,diameter than the end face of the brush which operates on the channel lip. This construction avoidsthe possibility of scouring through the lip.

These .and otherfeatures of the invention, in cluding certain details of construction and combinations of parts, will be described in .connection with the illustrated machine and pointed out ,I in the appended claims.

, ;Referring now to the accompanying drawings, Fig. l is a view in perspective of the improved machine, omitting the base of the supporting frame thereof;

Fig. 2 is a view in end elevation of the machine shown in Fig. 1;

:Fig. 3 is a View in front elevation of the machine; 4 is a perspective View of the several parts which make up the improved roughing tool;

Fig. 5 isa perspective view illustrating the operation' of the machine; 1

Fig. 6 is a detail View in end elevation of a modified stitch-rubbing mechanism; Fig. 7 is a detail view in front elevation of the stitch-rubbing mechanism shown inFig. 6; and

Fig. 8 is an incompletesectional view illustrat-' ing a detail of the machine and taken on line VIIlIV'III of Fig. 3.

The operating instrumentalities of the machine.

are carried by a head iii which is mounted upon a suitable standard. Formed in the head II) are a pair of bearings l2 andM, respectively, (Fig. 3), in which is mounted a shaft l6 having an externally tapered end portion 32. Mounted upon the shaft I5 are a pair ofloose pulleys l8 and 20, and between these pulleys is mounted a pulley 22 which is fixed to the shaft It. A cover plate 23 for-the above-mentioned pulleys is secured to the'head ID. A pair of oppositely running belts 24 and 25 which maybe driven from any suitable source of power normally engage the loose pulleys I8 and 29, respectively. When it is desired to drive the shaft l6, one or the other of the belts 24 and 26 may be shifted'from its loose pulley to the fixed pulley 22 by one of a pair of belt shifters 28 and 30. a

The roughing tool is mounted upon the free end of the shaft l6 and comprises a hub 34 (Fig.

' of the above-mentioned spindle extends through the shaft Hi from "the far end thereof,-having a *handwheel 35 which enables the operator readily to secure the roughing toolas a unit to the shaft I6, or to release the roughing tool for removal with a radial slot 44 extending through the diskv at the base of each of these guideways. Extending from each of the blocks 42 through each of the guideways 44 is a pin 45. Integral with the hub 34 is a circular plate or disk 48 in which are formed four spiral slots 58. Eachoi the pins 46 extends into one of the slots 50, the slots being.

so designed as to cause the blocks 42 to be ad'- justed radially upon relative rotary movement between the disks 38 and 48.

Mounted upon each of the blocks 40 are a pair of arcuate members 52 spaced axially from each other to accommodate stitch-rubbing mechanism later to be described. Each of the arcuate members 52 carries radially extending tufts of wire bristles which constitute the abrasive periphery of the tool. The arcuate members 52 are channel shaped, with the tufts of bristles set in the base of the channel and the walls serving to confine the bristles axially and presenting smooth outer surfaces. Each arcuate member is secured by screws extending through the base of its channel and threaded into the periphery of its respective block. Two rows of tufts are provided in each arcuate member, the rows extending circumferentially parallel to each other with the individual tufts staggered. Each arcuate member is staggered circumferentially with respect to its neighbor on the same block to enable the four arcuate members of each ring to break joint with those of the other ring. While expansion of the brush by radial adjustment of the blocks 42 may tend to open up spaces in each ring of bristles, the other ring will be continuous in the neighborhood of such spaces and as a result there will always be some bristles in engagement with the work to assure a steady even action upon the work and to avoid the bumping which might occur if the spaces did not break joint.

The bristles on the arcuate members 52 adjacent to the disk 38 are relatively coarse in texture, being in the neighborhood of 0.006 of an inch thick while the bristles on the arcuate members further removed from the disk 38 are relatively fine, for example about 0.0045 of an inch. The brush comprising the coarser bristles is identified by the reference character 54 and the brush comprising the finer bristles by the reference character 56. Loosely mounted upon the spindle 36 beyond the blocks 40 is a clamping disk 58.

The outer end of the spindle 36 is threaded to accommodate a clamping nut 60. It is evident that when the nut 60 is tightened all of the brush elements will be tightly clamped against the disk 48 in whatever position of radial adjustment the blocks 40 may occupy. Threaded upon the hub 34 is a sleeve 62 from which extends a frusto-conical shield 64, the rim of which may engage the bristles of the brush 54. The sleeve 62 is held in any desired position of adjustment by a locknut 66. By adjusting the sleeve 62 the bristles of the brush 54 may be prevented from flaring toward the right, or they may even be bent toward the left. The right-hand edge of the periphery of {the brush 54 is thussharply defined, enabling the operator to confine the roughing action to the channel base without damaging the upper of the shoe and avoiding the possibility of stray bristles which might scratch the upper. The periphery of the brush 54 is frusto-conical with the large end adjacent to the brush 56. The periphery of the brush 56 is likewise frusto-conical with the large end adjacent to the brush 54. Referring to Figs. 3 and'5, however, it will be observed that the diameter of the large end of the periphery of the brush 54 is somewhat greater than the diameter of the adjacent large end of the periphery of the brush 56 for a reason which will later be explained.

The means for holding the channel lip against the brush 56 are in some respects similar to those disclosed in the above-mentioned Patent No.

' 2,004,109 and comprise a wedge-shaped finger 68 adjustably secured to a sleeve 10 carried upon the lower end of a lever 12. The finger 68 is similar to the member 82 of the machine disclosed in the above-mentioned application of Johnson, having an under surface adapted toengage the sole of a shoe and an upper surface adapted to support the channel lip against the roughing tool. As best shown in Figs. 1 and 2, the lever 12 is made up of four segments secured together by. adjustable rigid connections 13 and I5 and also by a hinge TI. The connections 13 and I5 "are of the tongue-and-groove type, the former being arranged for forward and backward adjustment (right and left as seen in Fig. 2) and the latter for heightwise adjustment of the finger 68; The hinge 11 connects the lowest segment, which carries the fingers 68, to the rigid assembly comprising the other three segments, and is arranged for swinging movement of the finger 68 toward and from the roughing tool. A relatively weak compressionspring 19 surrounding a screw 8| tends to hold the finger 68 away from the roughing tool. The screw 8| extends through one of the segments and is threaded into the other to provide an adjustable stop for the extent of separation of the segments under the influence of the spring 19. The spring 19 yields under pressure as the shoe is held against the roughing tool during the operation, the upward swinging movement of the finger being limited by the engagement of adjacent surfaces on the two segments of lever which areconnected by the hinge 11. The uppermost segment of the lever 12 is fulcrumed upon a pin 14 carried by a block 16 which in turn is mounted upon the end of a rod '18 secured in lugs extending from the head Ill. The upper arm of the lever 12 is connected to one end of an operating rod 80, the opposite end of the rod 80 being pivotally connected to an arm 82 which is mounted for free swinging movement .upon a bracket 84 carried by the rod 18. A rod 86 extends upwardly from a treadle (not shown) and is pivotally connected to the arm 82. Depression of the treadle will draw the arm 82 downwardly, causing the rod 80 to be pulled towardthe right, as seen in Fig. 3,'to rotate the lever 12 in a clockwise direction. The treadle is .normally held up by a spring (not shown) to a stop position determined by a collar 81 adjustably secured upon the rod 86 and engageable with a lug 89 extending from the head I. The connection between the lever 12 and the rod 80 provides for fine adjustment of the normal or operating position of the lever 12 about its fulcrum i4 and comprises a pin'having a knurled head 9|. The end portion of the shank of this pin is threaded through an eye in the rod 80 and is secured by a locknut 95. An eccentric 93 (Fig.

2) formed on the shank engages an eye formed in the lever 12. Adjustment is effected by turning the head 91 while the locknut is loosened.

A gage 88 is provided for assisting the operator in positioning the work piece. Thisgage' extends over the channel lip-and terminates in a downwardly extending convex edge 90 which is positioned in the general plane of the clearance space provided by the axial spacing of the two sets of arcuate members 52 as already described. The shank of the gage 88 is adjustably clamped by a screw 92 in the lower end of a bar 04, the upper end of which is. clamped upon the pin 14.

In addition to the roughing brushes which act upon the channel base and the channel lip, the machine is provided with means for rubbing down the stitches which extend over the surface of the channel base closely adjacent to the shoulder of the channel. The machine shown in Figs. 1, 2, 3 and 5 is provided with a single stitch rubbin tool. A modification comprising a pair of stitchrubbing tools is illustrated in Figs. 6 and '1. Each member of the pair shown in Figs. 6 and '1 is similar, except for minor differences which will later be pointed out, to the single tool disclosed in the other figures, and the same reference characters employed to identify various portions of the single tool (together with its operating mechanism) havebeen applied to corresponding portions of one member of the pair. Such numbering will be convenient for the reason that certain details of the stitch-rubbing mechanism common to both the single and the double tool arrangements are best shown in Figs. 5 and 6-.

The single stitch-rubbing mechanism will first be described. This mechanism comprises an arcuate plate 96 which extends rearwardly around the blocks 40 and through the clearance space between the two sets of bristles and which has formed in its lower extremity a plurality of blunt teeth I00 which engage the stitching. The plate 96 (see Figs. 5 and '7) is secured upon an arm I02, the upper end portion of which carries a block I04 having a longitudinal slot which is engaged by a slide I05 in which is journaled an eccentric I06 secured on a'shaft I08. A compression spring H0 is interposed between the lower end of the slot and the slide I05. A screw I I2 threaded through the upper end of the block :04 extends downwardly to engage the slide I05 as a stop to limit upward movement of the slide. The screw II2 is held in any desired position of adjustment by a. locknut H4. The arm I02 at a locality between the plate 96 and the block I04 is pivotally connected to a link 98 which is pivotally mounted for free swinging movement about the rod 18.

The shaftI88 is journaled in bearings I28 and I38 which are both carried by a bracket I32 (Fig. 3) secured upon the rod 18. Secured upon the shaft I08 is a'pulley I34 (Fig. 2) driven by a belt I36. Rotatably mounted in an arm I38 are a pair of pulleys I40 and I42 which rotate as a unit, being integral in the illustrated machine. The pulley I40 drives the belt I36 while the pulley I42 is, in turn, driven through a. crossed belt I44 from a pulley I46 which, in turn, is driven, when the shaft I8 is turning in the direction indicated by the arrow in Fig. 3, through a Horton one-way clutch I48 on the shaft I6. The arm I38 is pivotally mounted for adjustment about a pin I50 (Fig. 2) secured in a bracket I5I and has an arcuate slot I52 (Fig. l) concentric with the pin I50. The arm I38 may be clamped in any desired position of adjustment against the bracket I5! by a bolt I54 extending through the slot I52. The bracket at its intermediate portion is split for clamping about the bearing I30. The lower end of the bracket I5I is clamped by a. screw I53 to a pin I55 secured in the head I0.

Supported by the bracket I32 is a frusto-conical guard I56 extending beneath and in front of the rotating shield 64. The guard I56 is similar to that disclosed in the above-mentioned Brostrom Patent No. 2,087,238 and is similarly adjustable bothheightwise and axially of the tool by means of clamping bolts I60 extending through slots I62 (see Fig. 3).

For sharpening the maintaining the desired contour of their periphery there is provided a grinding wheel I64 secured upon a'shaft journaled in a bearing I60 carried by an arm I68. The grinding wheel shaft carries a pulley I10 which is driven by a belt I12. The arm I68 is secured upon a shaft I13 which is journaled in a bearing I14 carried by the bracket I32. Rotatably mounted upon an eccentric I16 are a pair of-pulleys I18 and I80 both integral with a common hub I82 and rotating as a unit. The belt I12 runs over the pulley I18 while the pulley I80 is driven by a belt I88 running over a pulley I84 secured upon the shaft I6. The arm I68 extends beyond the bearing I66 and its outer end portion constitutes a handle having a knob I86 by which the arm I68 may be swung about the axis of the shaft I13. It will be observed that the grinding wheel I64 may be brought down from its inoperative position, as shown in Figs. 1, 2 and 3, into engagement with the brushes 54 and 56. The operating position of the grinding wheel is determined by a stop screw 188 engageable with an abutment surface I90 formed on the bracket I32 and secured in adjusted position by a lock-nut I92. When in its upper or inoperative position the arm I68 is supported by a knurled head I94 oithe screw in contact with an upper portion of the abutment I90.

brushes 54 and 56 and for f The arrangement of the eccentric I16 upon the shaft I13 is such as to loosen the belt I83 when the grinding wheel is moved into inoperative position, thereby stopping the drive of the grinding wheel, and to tighten the belt I83 and thereby cause the grinding wheel to be driven when the grinding wheel is brought into operative position. In order further to insure that the driving wheel will not needlessly be driven when in inoperative position a plunger I96 (see Fig. 3) mounted in the bearing I14 is urged by a spring I91 into engagement with an annular raised surface I98 on the pulley I18. Movement of the grinding wheel into operative position will withdraw the surface I98 from engagement with the spring plunger. In order still further to insure against the grinding wheel being needlessly driven when in its inoperative position there is provided a brake in the form of a finger 200 (Fig. 8) engageable with the belt I83 where the latter runs over the pulley I80. The finger 200 extends from a hub 202 rotatably mounted on the rod 18 and having a second finger 204 which, in turn, is engageable by an arm 206 extending from a hub secured upon the end of the eccentric'I16. A torsion spring 208 coiled about the rod 18 tends to hold the above-mentioned brake in inoperative position.

Swinging of the grinding wheel I64 up into inoperative position will cause the arm 206 to engage the finger 204 and thereby force the finger 200 against the beltI83.

'As previously mentioned, the peripheries of the 15 brushes 54 and 56 are frusto-conical with their larger diameters adjacent to each other and with the larger diameter of the brush 54 somewhat greater than that of the brush 56. In order to maintain this desired contour of the roughing tool the grinding wheel is provided with two frusto-conical surfaces 2Illand 2I2 which are complemental, respectively, to the desired contours of the brushes 54 and 56. The smaller ends of the frusta 2H] and 2I2 are accordingly adjacent to each other, the diameter of the smaller end of the frustum 2H) being somewhat less than the diameter of the smaller end of the frustum 2I2. The frusta 250 and 2I2 may conveniently be composed of separate disks of suitable grinding material secured together as a unit upon the shaft I66.

In order to keep the surface of the work piece free of leather dust during operation there is provided a blast nozzle 2I4 which is supplied with air under pressure through a conduit 2I6 supported by a clamp 2i 8 on the bracket '56. A suction dust hood 220 (Fig. 1) is provided for disposing of the dust.

The operation of the machine upon a shoe S having a channel lip L is illustrated in Fig. 5. The operator first depresses the treadle to retract the finger 68 from the brush 56. He then inserts an end portion of the lip L between the finger 68 and the brush 56, pressing upwardly to compress the spring I9 until the finger 68 swings upwardly as far as permitted by the above-described engaging faces on the segments of the lever 72 connected by the hinge Ti. He then releases the treadle, enabling the treadle spring to swing the lever I2 counter-clockwise, as viewed in Fig. 3, into the operating position determined by the adjustment of the eccentric 93. The finger 68, in accordance with such adjustment, will control the pressure of the lip L against the brush 56. In presenting the shoe to the machine the operator holds the shoe with the toe end pointing toward him, and he feeds the shoe away from himself. He is careful at all times to hold the shoe with the edge 90 of the gage 68 against the shoulder of the channel, thus maintaining the shoe in proper relation to the roughing and stitch-rubbing tools. The edge 96 prevents the operator from inadvertently moving the shoe too far to the left, which might cause the finger 68 to turn down the lip L and thus to expose the wrong side of the lip to the brush 56. The direction of rotation of the shaft I6 as indicated by the arrow in Fig. 3 is such as to assist in the feeding of the shoe. The operator in feeding the shoe turns it in accordance with the curvature of the outline of the sole, continuing the operation until the opposite end of the channel is reached. When he finishes the operation the toe end of the shoe will be pointed away from him.

It will be observed that the stitch-rubbing tool 96 is oscillated in an orbital path which is elongated in the direction of feed of the shoeand that this tool in its lower position, at which it engages the shoe, will travel in the direction of feed. The movement of the tool is considerably faster than the feed of the shoe to enable the tool to rub against the stitching. The spring I I yields and thereby enables the shoe to flatten out the lower portion of the path of travel of the stitch-rubbing 'tool 96 which otherwise might tend to push the shoe away from the brushes 54 and 56. The teeth I60 engage a length of stitching greater than the extent of their oscillation. The successive contacts of the teeth will thus overlap, and the entire length of stitching will be engaged. The effect of the teeth I06 is not only to rub down and flatten out the stitches, but also slightly to mutilate the top of the thread to enable the cement better to penetrate and better to adhere when the lip is laid. The teeth I60 are not sharp enough to weaken the thread appreciably. The stitch-rubbing tool, also operating in the direction of feed, contributes to the elfect of the roughing brushes in helping the operator feed the shoe. The width of the teeth I00, that is, the thickness of the plate 96, is more than sufficient to cover the stitching, being enough greater to avoid likelihood of missing the stitching as the operatonaided by the gage 90, feeds the shoe. When it is desired to sharpen the brushes the rotation of the shaft I6 is reversed by moving firstthe belt shifter 28 to the left and then the belt shifter 30 to the left, as viewed in Fig. 3. Such reversal of drive while the brushes are beingsharpened increases their effectiveness when driven in their normal direction for roughing. It will be observed that the Horton clutch I48 will not operate to transmit such reverse drive of the shaft I6 to the shaft I68, and will thus prevent the stitch-rubbing instrumentalities from being needlessly driven during the grinding of the brushes. The arm I86 is then swung down into operative position. As has already been explained, such movement will cause the grinding wheel to be driven and the adjustment of the screw I 88 will determine the exact diametrical dimensions of'the brushes. As the brushes wear down they may be expanded by loosening the nut 66 and rotating the brushes together with their disk 38 relatively to the disk 48. The brush assembly may then be clamped in adjusted position by tightening the nut 60. The contour of the periphery of the brushes as above described is important, inasmuch as it has been found that unless the diameter of the larger end of the brush 56 is less than the diameter of the larger end of the brush 54, the brush 56 may sometimes tend to scour through the relatively thin lip of the channel. The fact that the brush 56 is composed of finer and more flexible bristles than the brush 54 helps likewise to avoid damage to the channel lip. The modified stitch-rubbing mechanism shown in Figs. 6 and 7 comprises a pair of stitch-rubbing tools oscillated alternately with one or the other always in engagement with the work. Except for such differences as will presently be pointed out, the various members of one set which make up this double mechanism are similar to corresponding members of the other set, and also to corresponding members of the simpler mechanism already described. For convenience, one set of members of the double mechanism have been given the same reference characters as the corresponding members of the single mechanism. The second set of members shown in Figs. 6 and 7 comprise a plate 596 similar to the plate 96 but extending forwardly around the blocks 40, and having formed in its lower extremity a plurality of blunt teeth 666. Each of the plates 96 and 596 in the locality of the teeth is reduced to half the thickness of the remaining portion of the plate. The reduced portions of the plates are in sliding engagement with each other, and are of sufilcient extent to provide clearance for the unreduced portions as, the plates oscillate. The unreduced portions of the plates, as seen in Fig. 7, are in alinement with each other and occupy the clearance space between the brushes 54 and 56. The plate 96 of the'single stitch-rubbing mechanism -.is not reduced in thickness at'the locality of theteeth and in that respect differs from the plate 96 of the double mechanism. The plate 596 is secured upon an arm 602 similar to the arm I62 except for the fact that the. arm I 62 is ofiset to bring the plate 96 into alinement with the plate 596. The upper end portion of the arm 662, carries a block 664 similar to the block I04 and having a longitudinal slot which is engaged by a slide 665 similar to the slide I95. An eccentric 666 similar to but displaced 180 from the eccentric I06 is secured on the shaft I96 and is journaled in the slide 605. In the double construction illustrated in Figs. 6 and 7 the eccen-- trics I06 and 606 are integral, being formed on a sleeve which is secured upon the shaft I68. A compression spring 6") similar to the spring H6 is interposed between the slide 665 andthe lower end of the. slot in the block 664. A screw 6I2 threaded through the upper end of the block 664 extends downwardly to engage the slide 695 as a stop to limit the upward movement of the slide. The screw (H2 is held in any desired position of adjustment by a locknut 6M. The arm 662 at a locality between the plate 596 and the block 694 is pivotally connected to a link 598 which is pivotally mounted for free swinging movement about the rod 18. The members 6I2, 6M and 598 are similar in construction and purpose to the previously described members H2, H4 and 98, respectively.

The movement of the stitch-rubbing tool 596 like that of the tool 96 previously described will be oscillation in an orbital path elongated in the direction of feed of the shoe. By reason of their respective eccentrics being displaced from each other by 180 the stitch-rubbing tools 96 and 596 will operate alternately. The springs III! and BIG will yield and thereby enable the shoe to flatten out the paths of travel of the tools with the result that one tool will engage the work before the other has left it.

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

1. A machine for operating on channeled soles comprising a pair of roughing tools constructed and arranged to operate respectively upon a channel base and a channel lip, a movable stitchrubbing tool positioned between said roughing tools, and means for imparting stitch-rubbing movement to said stitch-rubbing tool.

2. A machine for operating on channeled soles comprising a pair of adjacent roughing brushes for operating respectively upon a channel base and a channel lip, a driven shaft on which said roughing brushes are mounted, a stitch-rubbing tool positioned between said roughing brushes, and means for oscillating said stitch-rubbing tool.

3.In a machine for operating on channeled soles, a rotaryroughing brush adapted to operate upon a channel surface, driving means for said brush, a stitch-rubbing tool adjacent to said brush, and means for oscillating said stitch-rubbing tool.

4. A machine for operating on channeled soles comprising a pair of driven adjacent co-axial roughing brushes for operating respectively upon a channel base and a channel lip, a stitch-rubbing tool in the form of a thin blade-like member extending between said brushes and having blunt stitch-engaging teeth extending from its outer.

edge, and means for oscillating said stitch-rubbing tool.

5. In a machine for operating on shoes, a

stitch-rubbing tool, mechanism for oscillating said too-l in an orbital path, and a spring in said mechanism yieldable under pressure of the sole against the tool to flatten out said orbital path 5 way, and a freely swinging link upon which the intermediate portion of said lever is fulcrumed.

7. In a machine for operating on shoes, a stitch-rubbing tool, a lever carrying at one of its ends said stitch-rubbing tool and having a slotted guideway formed in its other-end, a driven eccentricin driving engagement with said guideway, a freely swinging link upon which the intermediate portion of said lever is fulcrumed, and a compression spring interposed between said eccentric and the base of said slot to enables-aid stitch-rubbing tool to yield under pressure of the work. I 8. In a machine for operating on shoes, a pair of stitch-rubbing tools in sliding contact with each other, and means for oscillating said tools alternately in orbital paths.

9. A machine for operating on channeled soles comprising a pair of roughing tools constructed and arranged to operate respectively upon a channel base and a channel lip, a stitch-rubbing tool positioned between said roughing tools, and a gage engageable with the shoulder of the channel to position the shoe in operating relation to said tools.

10. A machine for operating on channeled soles comprising a stitch-rubbing member, means for oscillating said stitch-rubbing member to cause it to rub down stitching on a channeled sole, and a gage engageable with the shoulder of the channel to position the shoe in operating relation to said stitch-rubbing member.

11. A machine for operating on channeled soles comprising a roughing tool, a member adapted to hold a turned-up channel lip against said roughing tool, said lip-holding member being constructed and arranged to occupy the space between the turned-up lip and the outer surface of the sole on which the lip is formed, a lever carrying said lip-holding member, said lever being fulcrumed for swinging movement of said lip-holding member toward and from said roughing tool, a yieldable, element in said lever, and resilient 'means urging said yieldable element in a direction to maintain said lip-holding member away from the roughing tool, said resilient means being yieldable under pressure of the outer surface of the sole to enable the operator to exert pressure through the shoe to cause the liphold-. ing member to press the lip against the roughing tool.

12. A rotary abrading tool comprising a plurality of sectors, a support constructed and arranged for radial movement of said sectors, and

abrasive material constituting the periphery of the tool and carried by the sectors, the abrasive material on each adjacent pair of sectors overlapping to insure circumferential continuity when the sectors are expanded as a group.

13. A rotary abrading tool comprising a plurality of sectors each having abrading bristles extending outwardly from its periphery, a disk having a plurality of radial guideways in which said sectors respectively are mounted, a cam having a plurality of slots, means carried by said sectors and engageable with said cam slots for adjusting the radial positions of said sectors, said cam slots being arranged to cause radial movement of said sectors upon relative rotation of said disk, and means for securing said disk against rotation to hold said sectors in their adjusted positions.

14. A rotary roughing brush comprising a plurality of sectors each having abrading bristles extending outwardly from its periphery, a disk having a plurality of guideways in which said sectors are respectively mounted, a circular plate having a plurality of spiral'cam slots and having a hub on which said disk is rotatably mounted, cam elements on said sectors respectively cooperating with said spiral slots to move said sectors radially to expand and contract the brush upon rotation of said disk relatively to said cam plate, and means for clamping said sectors against said cam plate to maintain the sectors in adjusted position.

15. A rotary'abrading tool comprising a plurality of sectors, a support constructed and arranged for radial movement of said sectors whereby the sectors may be expanded as a group to increase the diameter of the tool, and a pair of arcuate abrading elements on each of said sectors, the members of each pair being axially separated from each other to provide a clearance space extending around the periphery of the tool.

16. A rotary roughing brush comprising a plurality of sectors, a support constructed and arranged for radial movement of said sectors whereby the sectors may be expanded as a group to increase the diameter of the brush, a pair of arcuate channel-shaped bristle holders on each of said sectors, the members of each pair being axially separated from each other to provide a clearance space extending around the periphery of the brush, and wire bristles set in the bases of said channel-shaped holders and extending beyond the Walls of said holders.

JOHN B. HADAWAY.

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