US2084348A - Machine for operating upon soles - Google Patents

Description

1m 22, 1937. N. H. KNOWLTON' 2,084,348

MACHINE FOR OPERATING UPON SOL-ES Filed Oct. 15, 1935 7 Sheets-Sheet l June 22, 1937. N. H. KNOWLTON 2,084,343

MACHINE FOR OPERATING UPON SOLES '7 Sheets-Sheet 3 Filed Oct. 15, 1935 June 22, 1937.

N. H. KNOWLTON 2,084,348 MAGHINE FOR OPERATING UPON SOLES Filed Oct. 15, 1935 7 Sheets-Shem; 4

MACHINE FOR OPERATING UPON SOLES Filed Oct. 15, 1935 7 Sheets-Sheet 5' 12 92 w m mfg 70F;

June 22, 1937. N. H. KNOWLTON' I MACHINE FOR OPERATING UPON SOLES Filed Oct. 15, 1955 7 sheets-sheaf 6 June 22, 1937. N. H. KNOWLTON 2,084,343

MACHINE FOR OPERATING UPON SOLES Filed Oct. 15, 1935 7 Sheets-Sheet 7 v l ig yvf/v 70/1 Patented June 22, 1937 aa ns PAT? 1 MACHENE FOR OPERATING UPON some Application October 15, 1935, Serial No. 45,110

14 Claims.

This inventionrelates to improvements in machines for operating upon soles and is herein illustrated as embodied in a channeling machine of the type in which the marginal portion of a sole is advanced continuously past operating tools by means of a work supporting feed wheel. These tools, which may comprise, for example, a channel knife and a grooving tool, are, in the illustrated machine, carried upon a head which is movable upwardly and downwardly in response to the thickness of the work, the operating tools being gaged from the upper surface of the work by a presser foot. The head is urged downwardly by a spring, causing the presser foot to remain in engagement with the work and also to press the work against a feed wheel. Machines of this type may be used for channeling and grooving outsoles for McKay sewed shoes.

The general object of the present invention is 20 to improve the construction of such machines for the purpose of making the machines more efficient and reliable in operation.

In accordance with a feature of the invention the head upon which the operating tools of the illustrated machine are mounted is carried by an upper frame member which is detachable from the lower or principal portion of the frame of the machine, this upper frame member being secured fixedly upon the lower frame member in a desired position of adjustment transversely of the direction in which the Work is fed. Such provision for the adjustment of the upper frame enables the position of the operating tools transversely of the direction of the feed to be conveniently determined.

In accordance with another feature of the invention the feed wheel is provided with elongated teeth extending from its periphery, each of the teeth having a ridge which extends lengthwise of the tooth and which is convex in longitudinal section. In the illustrated machine the teeth are disposed obliquely to their path of movement. Teeth of such form not only tend to urge the work transversely against the edge gage as it is being fed but also facilitate turning of the work about the more sharply curved portions such as at the ball line or at the toe without tearing the fibres of the material of the sole.

50 The invention further includes improvements in the general organization of machines of this type, improved means for supporting the grooving instrumentality, and other features of construction and combinations and arrangements of parts hereinafter described, the advantages of which will be obvious to those skilled in the art.

In the accompanying drawings, Fig. 1 is a view in side elevation of the improved machine;

Fig. 2 is a view of the machine in front elevation;

Fig. 3 is an enlarged view in side elevation of the feeding mechanism and channeling knife of the improved machine;

Fig. 4 is a sectional view in side elevation of a portion of the machine;

Fig. 5 is a plan view of parts shown in Fig. 4;

Fig. 6 is a sectional View in front elevation of a portion of the machine;

Fig. '7 is a view in front elevation of a portion of the driving mechanism;

Fig. 8 is a plan view of the guiding and feeding mechanism;

Fig. 9-is a sectionalview in side elevation of the guiding and feeding mechanism;

Fig. 10 is a sectional plan view of parts shown in Fig. 9;

Fig. 11 is a perspective view of the support for the channeling knife;

Fig. 12 is an elevational view of the channeling knife; i

Fig. 13 is a perspective view of the grooving knife and its support;

Fig. 14 is a perspective view of a portion of the structure shown in Fig. 13;

Fig. 15 is a view in front elevation of the structure shown in Fig. 13;

Fig. 16 is a perspective view of parts shown in Fig. 14;

Fig. 17 is a longitudinal view of the grooving knife;

Fig. 18 is a plan View of the support for the grooving and channeling knives;

Fig. 19 is a fragmentary View in front elevation of the feed wheel;

Fig. 20 is a perspective view of a portion of the periphery of the feed wheel;

Fig. 21 is a transverse sectional view of one of the feed teeth taken at the highest point of the tooth and at a right angle to the major axis of the tooth;

Fig. 22 is a fragmentary view in front elevation of a feed wheel having a different form of tooth;

Fig. 23 is a perspective view of a portion of the periphery of the wheel shown in Fig. 22;

Fig. 24 is a sectional view in front elevation through the highest point of one of the feed teeth of the wheel shown in Figs. 22 and 23;

Fig. 25 is a fragmentary view in front eleva- 7 "heightwise adjustable to enable the operatorto bring to-a convenient level the locality at which tion of a feed wheel having a third form of tooth; V 1 l Fig. 26is a .perspectiveview of a portion of the periphery of the wheel shown in Fig.v 25;: and

r i Fig. 27 is a sectional View taken in a plane normal to the ridge of one of the feed teeth shown in Figs. 25 and 26. V

The operating instrumentalities of the illus trated machine consists of a knife ID for forming a channel in an outsole and a tubular knife I 2 for forming the usual stitch-receiving groove at the root of the channel lip. A toothed feed wheel l4 advances the sole past the channeling and groov ing knives. A driven roll l6 engages the edge of the sole to gage the sole relatively to the knives.

A pressure foot l8 holds the sole in firm engage-' v ment with the feed wheel'l4 and also controls. the heightwise position of the knives relatively.

to the sole.

a work bench.

in any desired position of heightwise adjustment a frame 24. The frame24 carries the operating" instrumentalities above referred to, and it is made the work is presented. Mounted directly up'o'n the frame 24 are a shelf 23 (Fig. 2 and guard plates25 and 21 for the feed wheel I 4.

The driving mechanism for the feed wheel [4 and gage roll I6 is carried by the framef24 and comprises a pul1ey 26 adapted to be driven from any. suitable source of power and mounted for "free rotation upon a stationary shaft 28 which is secured to the frame 24. Integral with the pulley 26 is a clutch disk 30. 7 Also mounted for free rotation upon the shaft 28 is a clutch memher comprisinga hub 32' carrying a disk 34 which in the illustrated construction consists of'bakelite molded to provide a rim 38 which enables the disk to be employed as a hand wheel when'it ,is desired to turn the machine slowly byhand; A bearing 38 for "taking end. thrust from the hub 32 is carried by the frame 24. Secured upon the disk 34 are a, plurality of leather clutch the clutch members:40. I

, When it is desired to start the machine running' members 40 which are engageable with the face of the clutch disk 30. A spring 42 normally holds the face of the disk 30 out of engagement with the clutch disk 30. is brought into engagement 2 with the clutch members 40 by a treadle-operated mechanism comprising an idler roll 44 which exertsaxial pressure upon a'hub cap 46 of the pulley 26. 'The roll 44 is mounted in the upper.

end of a lever 48 which is slotted to embrace '7 of the lever 50.

the upper end ofa lever 50. The lever. 48 is pivotally connectedto the lever 50 by a 11111 52.

Acompression spring 54 surrounds a pin '56 which is threaded into the upper end of the lever 50, the spring 54 being interposed between a washer 5'! abutting the head of the pin 56, and a washer 59. Thewasher 59 engages'the lever 48 on each side of the slot formed therein to transmit the thrust" of the spring 54 into the lever 48. v The lever 48 thus constitutes a yieldable extension 7 The elongation-of the'spring 54 is limited by the engagement of the washer 59 with the lever 50. The p sure of the spring 54 can'be adjusted as desired by turning the threaded pin 56. The lever 58 is fulcrum ed upon a pin 58 which may be clamped in. any desired position of heightwise adjustment in a" slot 6 I.

Thesupporting structure of the machine comprises a base plate ZBadapted to be secured upon;

Integral with the plate 20 is a vertical guideway- 22 in which may belsecured ally extending depressions and projections 10 adapted to intermesh. Adjustmentis effected by formed in a bracket 60 secured to the base plate.

The pin 58 is adjusted up or down in the slot 6| to bring the roll 44 into proper relation with the hub cap 46, the level of thehub 'cap 26 depending upon the heightwise adjustment of the frame 24. A stop screw 62 threaded in the lever 50 adjustably limits the outward movement of the lever 50-by engaging a afinge.64 of the bracket 60. As shown in Fig. 1, the flange 64 extends vertically so as to be engageable with the stop screw 62 regardless of the heightwise adjust free end to. the upper'end of a treadle rod 12. In I order to compensate for the heightwise adjustment of the fulcrum pin 58, the arm 66 may be adjusted relatively to .the lever 50. To provide for such adjustment the arm 66 and the lever 50 are pivotallyconnected to 'eachfother bya pin 68, the arm and the, lever each having a hub,

which hubs are provided, respectively,'vvith radiloosening the pin 68, separating theptwo hubs,

rotating the arm 66 to bring its free end tQ the desired level, and'then tightening the pin 58 to! bring the two hubs into clamping position. The

lower end of the treadle rod 12 is connected to a treadle-M. A spring 16 secured at one'end to the arm 65 and at its opposite end to the work.

bench serves to hold the arm 66 andthe treadle 14 normally in upward position withthe clutch disk of the driving pulle y out of engagement with I -:the clutch members 40. 1 e

' The treadle 14 controls the'starting and stop ping of the machine. Depression of this treadle rotates the lever 50 in a counterclockwise direction, as viewed in Figfl, and, through thespring 54, causes therroll 44 to bear yieldingly against the hub cap 46 and bring thdclutch disk 30 into' engagement with the clutch mem- V bers 40. A spring-pressed latch '11 relieves the operator of having tohold down the treadle duringthe operation. It will be noted that'the pressure between the clutch members 40 and the disk 3!] depends upon the adjustment of the spring 54. Thefpressure of the spring 54'should be so adjusted as to enable the clutch members to drive without slipping when a sole is'being operated upon. However, the pressure of the spring 54 should be only slightly in excess'of what is necessary, so that the operator can at once slow down or stop the machine by grasping the rim 36.. Manual control in this manner is frequently moreconvenient than hand feedingwith the clutch members disengaged.

The drive is transmitted from the hub 32 through-a gear18 which is securedupon the hub 32 and which meshes with an ldlergear (Fig.

7) mounted upon a stud-'82 secured in the frame 24. The idler gear 80 drives a gear 84' which is fixed upon a shaft 85 by a set screw 88. 7 Because of the idler gear 80, the; direction of rotation of the hand wheel .34 will be the same as that of the 1 feed wheel I4, an arrangementwhich facilitates a manual drive or manual control of the drive.

V The shaft 86 is journaled in the frame and V V has an end extending outside the frame upon which there is secured by a set screw 89 a hub 90 (Fig. '3) The hub 90 carries a beveled gear92. Secured by screws- 94 to the outer face of the gear 92 is the feed wheel l4. One or more spacing members 96 may beinterposed between the feed wheel I4 and the gear 92. Secured upon the shaft 86 is a collar 98 (Fig. 1) against which bears one end of a compression spring I which surrounds the shaft 86. The opposite end of the I; spring I00 bears against a portion of the frame 24, the spring thereby tending to urge the shaft 86 and the feed wheel outwardly or to the left, as viewed in Fig. 1. The limit of such outward movement is determined by mechanism, later to be described, which operates upon the gear 84 through a washer I02 which is secured upon the face of the gear to take the wear.

The arrangements for supporting and driving the edge gage roll I6 will now be described. Formed in the frame 24 is a guideway I04 (Fig. 9) for a slide block I06 which is free to move in a direction parallel to the shaft 86. Secured in the outer end of the block I06 by a set screw I88 is a sleeve I I0 upon which is rotatably mounted a beveled gear II2 adapted to mesh with the gear e2. The gage roll I6 is threaded upon the hub of the gear Iii. against a spacing washer I I4 of desired thickness. A hub cap H6 is countersunk into and soldered to the upper end of the hub of the gear H2. A pin IIB having a rounded head I20 which rests upon the upper surface of the cap W5 extends downwardly through the cap H6 and through the sleeve IIO. Clampecl upon the lower end of the pin H8 by a set screw I22 is an L-shaped block I24 having a flange I25 which extends upwardly into a slot I28 formed in the outer end portion of the slide block I06. The purpose of the flange I25 is to prevent turning of the pin IIB with the gear H2. Surrounding the pin I I8 and housed within the sleeve IE0 and interposed between the cap I I6 and a shoulder on the sleeve H0 is a compression spring I30 which tends to raise the gear H2 and the gage roll I4 relatively to the sleeve H0 and the slide block I06. The height to which the gage roll I6 may rise under the influence of the spring I30 is controlled by a foot I32 for a purpose which will later be described. The head I20 serves as a bearing for the foot I32 and also, in combination with the pin H0 and the block I24, as a stop for limiting the upward movement of the gage wheel It. A guard I34 (Figs. 3 and 8) extends into the space between the upper portion of the feed roll I4 and the forward portion of the gage roll it to prevent the work piece from being caught between these two wheels. The guard I34 is secured to the slide block I06 by a set screw The slide block I05 is retained in the guideway I04 by a cover plate I38 (Fig. 3) in which is formed a slot I40 to accommodate a pin I42 which extends into the slide block and which serves as a means for urging the slide block inwardly or toward the right, as viewed in Figs. 3 and 9, for a purpose which will later be described. Threaded into the slide block and extending parallel to the shaft 85 is a rod I44, having a capstan head I46 (Fig. 1) in which are formed holes I48 to accommodate a tool for turning the rod I44 to adjust it 5 longitudinally with respect to the block I06. The rod 54.5 is retained in adjusted position relatively to the block I06 by a set screw I55. The rod N54 is slidably retained within a lug I52 extending from the frame 24. A coil spring I54 surrounds the rod I44, having one end abutting against the lug I52 and its opposite end abutting against the slide block I06 to urge the slide block outwardly or toward the left as viewed in Figs. 1 and 9. The shoulder which occurs at the junction of the head I45 with the rod I44 bears against the opposite surface of the lug I52 to limit the outward movement of the rod I44 and thereby of the gage roll I6. The end of the head I46 bears against the washer I02 and thus determines the outward position of the shaft 86 and the feed wheel I4 under the influence of the spring I00.

Fulcrumed upon a pin I50 which is secured in the frame 24 is a bell-crank lever, one arm I53 of which is connected to a treadle rod I60 and the other arm IIIZ of which is engageable with the pin I42. The lower end of the rod I60 is secured to a treadle I64. Extending from the arm IE8 is a lug I60 through which is threaded a stop screw I58 the end of which bears against a stationary lug I10 extending from the frame 24 to limit the movement of the bell-crank comprising the arms I58 and I62. Upon depression of the treadle I54 the arm I62 will urge the pin I42 inwardly or toward the right, as viewed in Figs. 1 and 9, against the pressure of the spring I54.

I This will move the gage roll It inwardly and also by reason of the fact that the head I46 bears against the washer I02 will cause the shaft 86 to be moved inwardly carrying with it the feed wheel I4. The inner position assumed by the feed wheel I4 and the gage wheel l6 upon depression of the treadle I64 is determined by the adjustment of the stop screw I58. The proper positioning of the gears $2 and H2 relatively to each other is obtained by loosening the set screw I I50 and turning the head I4 to adjust the gage roll inwardly or outwardly with respect to the rod I44. The pressures of the springs I00 and I54 normaily hold the feed wheel and the gageroll respectively in their outermost positions with the treadle I554 up. The normal position (i. e. the position when the treadle is up) of the gear 84 is always the same being determined by the capstan head I45 which bears against the fixed lug I52. The feed wheel I4, however, may be adjusted inwardly or outwardly upon the shaft 86 by loosening the set screw 89. The spring Idfi is relatively light to avoid excessive wear between the washer W2 and the capstan head I46.

Detachably mounted upon the upper portion of the frame 24 is a frame I772. Threaded into the frame I'IZ (Fig. 6) is a clamping screw I'Ifi having a inged head I15 and having also a flange H8 fer exerting clamping pressure against two spaced lugs I extending upwardly from the frame 24. The frame IIE has a finished surface I82 which is adapted to enter into clamping engagement with the opposite surfaces of the lugs I80 upon tightening of the screw M4 to hold the frame I'IZ securely clamped upon the frame 2d. The lugs Hill are undercut, as indicated by the numeral I83 on Fig. 6, to hold the frame I'IZ more securely in position. The frame I12 can readily be detached from the frame 24 by loosening the screw II4 sufliciently to enable the surface I82 to be withdrawn from beneath the undercut surfaces ISS. An inward and outward adjustment for the frame II! is obtained by loosening the screw I'M and sliding the frame Ill! inwardly or outwardly to the desired position. In order to facilitate such adjustment a screw W4 having a capstan head IE6 is threaded into a lug I83 extending from the frame I'IZ. A groove I99 is formed in the head I35 and is engaged by a stationary member I02 secured by a sore-w I93 in one of the lugs IBII. Turning of the head I36 while the clamping screw IE4 is loosened will adjust the frame I'l2 inwardly or outwardly, and when the desired adjustment has been effected the screw I84 is clamped by a set screw I94.

adjustment of the screw 84 changed,

The clamping screw H4: is then tightened. The

frame H2 can thus alway's be replaced in its adjusted position upon the frame Mas-long as the retained in engagement with the frame I12 by a guide i tlFig. 1.8). Fulcrumed upon a pin 2&6 secured in the frame H2 is a lever 208 having formed in it acup-shaped depression 210.

2E2 having a knurled head 2M; Surrounding the screw 2l2 and interposed between the head 214 and the bottom surface of the depression 2 I it is a compression spring Zit; Interpo-sed between'depressions'formed respectively in the under suruface of the outer end portion of thelever 2% and the upper surface of the head202 isra' strut 2E8. The pressure of,the spring 2l6 acting through the strut 2!8 urges the head 202 downwardly as far as permitted by a' stop screw 220 ,(Fig. 4) which is threaded through a lug 222 extending from the lever 200. The end of the stop 5 screw 220 bearsagainst the upper surface of the arm. Hit. The screw 220 isprovided with a knurled'head 224.

hold the screw 220 against accidental turning,

thereby retaining it in a position of desired adjustment. a e

The mounting of the 'presser'foot' l8 in the head 202 will now be described. Guided for movement in Vertical adjustment in'a rectangular notch in the head 202 is a block 228 (Figs. 1 and 2) of rectangular cross section. The block 228 is secured to the head 202 by a clamping.

screw which passesthrough a vertical slot in'the block 2253. In the lower portion of the block 228 is formed a horizontal guideway'in which the presse'r foot I8 is slidablymlountcd for horizontal "of the work. The presser foot is secured in its screw 235 is threaded into the block 228.

adjusted-position relatively to the block 208 by a clamping screw 232 which passes through a horizontal slot in the presser foot l8; In order to facilitate vertical adjustment of the presser foot is relatively to the head 202 an adjusting screw 234 has a knurled head236. A collar 238 integral withithe shank portion of the screw 234 tively to the head 202.

head will, therefore, serve. to raise or lower engages a notch formed in the head 202 to hold the screw 254, against vertical movement rela- Turning of the knurled the presser'foot IB. The lower portion ofthe presser foot H? has a smooth surface which rides upon the. upper surface of the work 'piece and which is rounded off, as indicated'by the 'reterence character 240 on Fig. 2; to accommodate the advancing work piece. j

. Thepresser foot l8, as has already been mentionecl, rests upon the work piece, and its pres sureuponi the work piece represents not only the f has not been 7 Ex- 7 tending through the lower wall of the depression 25c and threaded into the frame I12 isascrew Surrounding the screw 220 I V and interposed between the head" 2-24 and the lug a is a compression spring 226 which serves to adjustment in the direction of feed The total Weight of the head 202' and all tamarri ed thereby but also the force of the spring U6. The stop screw 220, which serves to keep the through the machine, is adjusted to enable the presser foot to approach the feed'roll I4 more closely than the minimum thickness of the work which is to be treated; During the passage'of Work the heightwise position of the channeling channeling and grooving knives out of contact p with the feed roll l4 when no work is passing knives. will be determined'bya the presser foot I I8 and not by the stop screw 220. i

The head 202 may be raised by a treadle mocha; nis m comprisng a lever 242 (Figs. 1 and 4) which 7 is fulcrumed upon a pin 244 secured in the frame 24. extending downwardly from the arm 200. Secured to the opposite end of the lever 242 is a. rod 240 the lower end of which is secured to a treadle 250. The depression of the treadle 250 will thus operate to raise the head 202. When the. channeling cut is to begin at one side of the heel end of a sole and terminate at theother side of the heel end it is unnecessary to raise the head 202 inasmuch as the feed wheel will carry the sole under the presser foot, and the head will yield One end of the lever 242 engages 9, lug 246' upwardly according to the thickness of the "sole.

However, in many types of work the channeling cut begins and terminates at localities between the ends of the sole, for example, at theheel breast line. In such cases the sole is introduced between the presser foot and the reed wheel with i the head raised the head being'rlowered to bring the knives into operating position at the locality at'which the channel is to begin, and being'r'aised again when the knives have reached the locality at which the channel is to terminate.

'The arrangements whereby the channeling knife i 0 is'secured in the head 202 will now be described. Slidably mounted in a vertical guideway formed in the head 202 and retained therein by a cover plate 25| (Figs. 3and 18) is a slide block 252. Threaded into the upper portion of the block 252 is an adjusting screw 254 havinga square'head 255. The upper portion of the shank of the screw 252 is smooth and passes through a 'bore in a lug 256 extending from the head 202; A collar 258 upon the screw 254 bears against the upper surface of the lug 256 prevent;

ing downward movement/of the screw 254. Surrounding the screw; 254 and interposed between the under surface of, the lug 256 and theupper surface of the block-252 is compression spring 260 which exerts a downward-thrust upon the- 7 block 252 to maintain the block'yieldingly in a position of adjustment-determined by the screw 254. Formed in the lower portion of the block 252 is an arcuate guideway 262' (Fig-L11) in which is slidably mounted a block 264. The block I 250'is secured in a desired position of a'ng'ular adjustment in the 'guideway 262 by a clamping bolt 265 (Fig.3) which isthreaded into. the. a

block 264 and which passes through a slot in the block 252. The under surface of the block 264 is formed to constitute a horizontal guideway parallel to the: direction of feed ofthe work for. a

block 268 which is secured in adjusted position fto the block 254 by a clamping bolt 210. A slot 272 parallel to the direction of feed of the work is formed in the block 268. to accommodate the bolt 21! for various positions of adjustment.

cated by the numeral 214, of the channeljknife $6. The shank214 is clamped in'a desired poj Formed in theblock 268, as shown in Figsfll and f l2, is a guideway for the shank portion; indiclearance.

sition of adjustment of the knife ID by a set screw 216. In order to insure that when the knife I6 is removed for grinding, or for any other reason, it may readily be replaced in the position of its former adjustment, a stop 218 is secured to the block 268 by a clamping screw 286. The screw 286 passes through a slot formed in the stop 218 and extending in a direction parallel to the guideway for the shank 214. The stop 218 has a flange 282 which overhangs the end of the shank 214 and thereby definitely limits the extent to which it can be inserted in the guideway upon replacement of the knife. The stop 218 may be clamped in any desired position by the screw 263 to determine the adjustment of the knife I6.

The elevation of the channeling knife relatively to that of the presser foot determines the heightwise position of the channeling cut, and may be varied as desired by adjustment of the screw 254. The inclination of the channeling cut is determined by the adjustment of the block 264 in the arcuate guideway 262. Adjustment of the inclination of the channeling cut does not vary the level, relatively to the thickness of the sole, of the point at which the knife I6 enters the edge of the sole, because the center of the arcuate guideway 262 is taken about that point, which is slightly higher than the upper edge of the periphery of the edge gage wheel I6. The block 268 is adjusted in its horizontal guideway to bring the cutting edge of the knife II] as close as possible to the presser foot I8, the block being advanced each time the knife is ground to keep the edge close to the presser foot. No adjustment of the knife l6 transversely of the direction of feed is ordinarily made. Such adjustment, however, can be effected by adjusting the position of the frame I'l2 by means of the screw I84.

Secured by a pair of screws 284 (Fig. 3) to the knife slide block 252 is a block 266 (Figs. 3 and 8) having a vertical guideway in which is secured the foot I32. An adjusting screw 288 having a knurled head 296 is threaded into the block 286. The upper and lower faces of the head 293 engage the walls of a notch formed in the foot I32, thereby determining the position of heighthwise adjustment of the latter. A clamping screw 292 passing through a vertical slot in the block 286 clamps the foot I32 to the block. The height of the edge gage roll I6, as has already been pointed out, is determined by the foot I32. The reason for such control over the height of the edge gage roll is to enable the roll to rise and fall in unison with the head 202 to accommodate varying thicknesses of the soles being operated upon, including local variations of thickness in a single sole. Relatively thick soles thus have an abutment of corresponding height, which avoids any tendency of such thick soles to slide over the top of the gage I6. The height of the gage I6, on the other hand, is strictly limited by the small but necessary clearance for the channeling knife I0. The adjustment of the height of the block 286 by the screw 288 should be such as just to provide this Since the foot I32 is carried by the channeling knife block 252, heightwise adjustment of the latter will not affect the clearance between the channeling knife and the gage roll.

The grooving knife I2 is mounted in the head 202 by means which will now be described. Slidably mounted for vertical movement in a guideway formed in the head 262 is a block294 (Figs. 4 and 18). A cover plate 296 retains the block 294 in its guideway. Threaded into the block 294 is an adjusting screw 298 having a head .300

and having also a collar 302 which is engageable with the upper and lower walls of a slot 304 formed in the lug 256 extending from the head 202. A spring 368 embraces a peripheral groove formed in the head 30!! to prevent undesired turning of the screw 298. Surrounding the screw 298 and interposed between the upper surface of the lug 336 and the lower face of the block 294 is a compression spring 3| which exerts a downward thrust upon the block 294 to retain the latter in a position of adjustment with the collar 362 bearing against the lower wall of the slot 364. Formed in the lower portion of the block 294 is a horizontal guideway 3l2 which extends in the direction of the feed of the work. Slidably mounted in the guideway 3I2 is a block 3I4 (Figs. 4 and 13). through a horizontal slot 3I'I in the block 3M and threaded into the block 294 secures the block M4 to the block 294. Threaded in the block 3l4 is an adjusting screw 3l3 having a knurled head 323. The end of the screw 3|8 bears against the block 294 and thereby determines the position of horizontal adjustment of the block 3l4 relatively to the block 294. The screw M8 is provided with a knurled lock nut 322. Upon the lower portion of the block 3I4 is formed a guideway 324 (Fig. 15) upon which is slidably mounted a block 326. The guideway 324 extends transversely to the direction of the feed of the work, and a clamping screw 328 passing through a slot in the block 326 secures the block 326 to the block 314. Formed in the under surface of the block 326 is an arcuate guideway in which is rotatably mounted a block 336 (Fig. 13) having an arcuate rib 332 which is slidable in the above-mentioned guideway. The block 330 is secured to the block 326 by a clamping screw 334 threaded into the block 326 and passing through a slot in the block 330. Retained within a bore in the block 330 is a draw bolt 336 (Figs. 13, 14 and 16) having a tapered portion 338 (Fig. 16) which engages a complementary tapered surface on the block 330 to lock the bolt 336 against turning when a clamping nut 340 threaded upon the end of the bolt 336 and bearing against the block 333 is tightened. Integral with the bolt 336 is a head 342. Slidably mounted in the head 342 is a shank 344 upon which is secured the tubular grooving knife I2. In the illustrated construction the grooving knife I2 is welded to the shank 344. The shank 344 is retained within its groove by a square washer 346 which is held bya clamping screw 348 threaded into the head 342. It is unnecessary to adjust the shank 344 relatively to the block 342, and in order to insure that the grooving knife will always be secured inthe same position relatively to the head 342, a finished surface 356 (Fig. 13) is provided on the head 342. This finished surface 350 constitutes a stop to limit the inward movement of the shank 344 by engagement with the knife I2. Secured upon the head 342 by a screw 35I (Figs. 14 and 16) is a block 353. As shown in Fig. 14, the block 353 has a flange engaging a complemental surface of the head 342 to provide for sliding adjustment of the block 353 parallel to the bolt 336. As also shown in Fig. 14, the block 353 is slotted to accommodate the screw 35I for various positions of adjustment. Secured upon the block 353 by a pair of screws 352 is a guide 354 for the thread of leather which is removed by the grooving knife. It will be noted that the angle of the grooving knife I2 can beadjust'ed by loosening the screw 334 and A clamping screw 3I6 extending Q rotating the block 330. The arcu'ate guideway for the block 33il has its center approximately at the locality of the cutting edge of the grooving knife l2 sothat angular adjustment ofthe grooving knife will not vary the position ofits'cuttingedge. In some types of work the stitch-receiving groove is omitted around the toe end of the sole 7 and the illustrated machine is accordinglypro vided with a treadle-ope'rated mechanism whereby the operator can discontinue. and resume the groove at will. This mechanism comprises a lever;356 (Figs. 2 and 18) which is fulcrumed upon a pin 353 mounted on the arm 200. The

outer end of thelever 2561s connected tofla; treadle' rod 368, the lower end'of which is-connected to a treadle 362.

The inner end of. the

lever 356is provided with a pair of spaced by the grooving knife 12.

slot 364, above referred to, is not only to deterears 364 which embrace a pin 3 66, secured to the slide block 2554. Depression of the treadle 362 will serve to raise the pin 366and there- The purpose of the mine the operating position of .thegrooving knife 12 under the influence of the spring 3l0, but

also to serve as an upper limit. to theimovement of the grooving knife to prevent the grooving knife from being raised iar'enough. to engage the; upperlip. This distance isrelatively slight and accordingly the'slot .304 is only' slightly deeper than the thickness of the collar 302.

It will be noted, referring to Fig, 2, that the.

line of pull of the treadlerod 360jis relatively closefto the axi's of the pin [98.5 Accordingly,

(Fig, 3) which, as illustrated in Figs. 19, 20 and 21, are obliquely disposed upon the cylindrical surface which constitutes the periphery of the feed wheel. Each of the teeth 368 hasasharp edge or ridge 316 whichhas the forml of a convex curve extending lengthwise of the tooth and rising fromthe surface of the periphery of the feed wheel. The lateral surfaces-breach tooth are generated by a pair of elementsf312 and 314,

respectively, which pass through the .edge' 310, each element being maintained substantially parallel to its original position. The form of tooth above described, havi'ng a'sharp edge 310, is employed in operations. upon leather soles, the presser foot i6 bearing down upon the soles with sufficient force to cause the feed teeth to cut into the surface of the leatherto' their full depth. For operating upon rubber soles a somewhat different form of tooth 316 illustrated in FigsL 22, 23 and 24 is preferable. The teeth 316. are likewise inclined to the elements of the cylindrical' surface which constitutes the periphery or" the wheel M. Each of the teeth 316 has an edge pressed agai'nstthe feed wheel with 'sufiicient force to cause the teeth 316 to become partially embeddedin the rubber. The edges 318, however;

or ridge Sis which .extends entirely across the. periphery of the 'feed wheel. The edge 318 is a' slightly convex curve and the tooth is generated by a pairof curved elements 380and 382 which' intersect in the edge 318. The rubber soles-are are not sharp enough to cut'into the rubber.

V A third form of. tooth, indicated by the refer V encechara'cter 385i, is illustrated inFigs.- 25; 26 and 27. The base of thisitooth f is an :oblique resulting from the the tooth 384 is approximately like 7 inj'the; material to their fulldepth,

convex ridge 31.8.

parallelogram (disregarding the curvature of the periphery of the feed wheel, which isnegligible over the area of'a single tooth), consisting of two parallel short sides 386 and'two parallel long. sides, one of which is indicated'by the reference" numeral 388. This tooth has .aridge 390 which is parallel to and equidistant from the long sides 388 of the base. The lateral faces, which are included between the ridge 390 and the sides 7 388 are substantially plane. The ridge 390 is shorter than the sides 388; and the end faces ofthetoothgwhich are triangular, lie in planes which slope upwardly toward each other from the short sides 386 and at equal angles to the plane of the base. .The intersections of the end faces with the lateral faces-form edges, and

those edges which extend from the ends of the ridge 398 to the acute corners respectively of the parallelogram of the base constitute .ineffectcontinuations of the ridge 390 and are designated by the referencecharacter 392. Theparal lelogram of the base is disposed :upo the pcriphery of the feed .wheel with the sides 388 e V inclined to the elements of the cylindrical sur face of the feed wheel; the long diagonal is similarlyinclined, but to a less extent." The tooth 384, like the tooth 368, doesnot extend to either edge of the periphery of the feed wheel The tooth 384 is an alternative to the tooth 368, and operates in the same way upon leather soles.'

All of the feed teeth above described arefas' upon'the periphery of the feed wheel. This 'has already been mentioned, obliquely disposed obliquity of the feed teeth causes them to exert upon the'sole a thrustwhi'ch is transverse to the direction of feed, urging the sole'again'st the edge gage,-and' relieving the operator of having to'hold thesole against the'edgegage. The sole canthus be leftto itself and .will'remain in contact with the. edge gage as it is fed,'turnin'g according to thevarious curves in its outline; The pressure of the workagainst the'edgegage inclination of. the feed teeth notonly maintains the; Work in' gaged relation to the operating tools but also; since the'edge gage is a driven roll the edge gage to assist ingfeedi'ng the work.

with a knurled edge,.en"ables' When a sole as it is being fed is turned in accordance with the curvature of its outline, the:

turning movement will give rise to components of motion which are lengthwise relatively to the feed teeth. Such components'are especially pro "nounced at ,the sharplycurve'd toe end of the sole. The tooth 368 is shaped-to facilitate 'such rn only is adapted to relative pivotal movement, but will cut, into the leather as relative endwisemovement takes place, without gouging tearing the fibers of the material and with a -minimum of resistance .to the relative'movement. 'I'hetooth 384 win behave in thesame way. It"

movement. The convex ridge 310 not the sole or willbe noted that the ridge 390,. together withthe edges 392, is similar to As already'mentioned, the teeth .316 are different inthat they are more blunt and are not intended" the ridge: 310; and that 5 Q the 6006113368.

tocut into ,the'material; they are not embedded and they ex'- tend completely across; the periphery of the feed I wheel. The 1 teeth "316, however, resemble the the pe pheryof the feed wheel and in having a The: end portionsof the teeth 316j-fare not embedded in theqm'at'erial. man 7 appreciable extent, and the convexity' of the'ridge 0'. T teeth 368 and 384 in being obliquely disposed upon 378 will accommodate relative longitudinal move-v ment of the work without any gouging of the material by the end portions of the teeth. It is apparent that all three forms of teeth will offer a minimum of resistance to the turning of the sole and avoid damaging the sole when it turns.

To start the machine the operator depresses the treadle is, latching it down, which couples the power drive of the machine to the feed wheel and causes the sole to be fed in operative engagement with the channeling and grooving knives. The depth of the channel is controlled by the edge gage roll it. In many types of work where the depth of the channel is to be increased at the shank portion of the shoe the operator depresses the treadle ltd which moves the edge gage roll inwardly and thereby increases the depth of the channel. When the stitch-receiving groove is to be discontinued, the operator depresses the treadle 362 holding it down until the work has been fed to a point where the groove is to be resumed. In certain cases it is desirable that thework be fed slowly and in such cases the operator may release the treadle 66, thereby disconnecting the driving clutch, and turn the wheel as by hand. The operator often finds it convenient to control the speed of the feed wheel by grasping the rim 35 and permitting it to slip through his fingers at the desired speed, without resort to the treadle i i.

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

l. A sole fitting machine comprising a lower frame, sole-supporting and feeding means on said lower frame, an upper frame, a head supported on said upper frame for movement toward and from said supporting and feeding means, an operating tool on said head, means for urging said head toward said supporting and feeding means, a presser foot carried by said head for supporting said head against said urging means in accordance with the thickness of the work, and means for securing said upper frame fixedly upon said lower frame in a desired position of adjustment transversely of the direction in which the work is fed.

2. A sole fitting machine comprising a lower frame, sole-supporting and feeding means on said lower frame, an upper frame, a head supported on said upper frame for movement toward and from said supporting and feeding means, an operating tool on said head, means for urging said head toward said supporting and feeding means, a presser foot carried by said head for supporting said head against said urging means in accordance with the thickness of the work, means for adjusting said upper frame relatively to said lower frame in a direction transverse to the direction in which the work is fed, and means for securing said upper frame upon said lower frame in adjusted position, said adjusting means being constructed and arranged to insure replacement of said upper frame in a position of previous adjustment after removal from said lower frame.

3. In a sole fitting machine, a frame, a head movably carried by said frame, an operating tool mounted in said head, a lever fulcrumed on said frame, a spring acting on said lever, and a strut interposed between said lever and said head for transmitting the thrust of said spring from said lever to said head to urge said head to a desired operating position, said lever and said head having recesses to accommodate the ends respectively of said strut.

4. In a sole fitting machine, a frame, a head movably carried by said frame, a channeling knife mounted in said head, a presser foot mounted in said head, a work support, a lever fulcrumed in said frame, a headed screw threaded into said 7 frame, a compression spring interposed between the head of said screw and said lever, and means for transmitting the thrust of said spring from said lever into said head to urge the presser foot against a work piece on said work support, said screw serving as a means of adjusting the compression of said spring.

5. A sole fitting machine comprising a tool for operating upon a sole, a feed wheel for supporting the sole and feeding the sole past said tool, a driven shaft upon which said feed wheel is mounted, an edge gage for positioning the sole relatively to said tool, a spring urging said edge gage to a stop position, means for retracting said edge gage from said stop position against the force of said spring to vary the position of the sole relatively to the tool, a spring for urging said feed wheel to a stop position, and connections to said edge gage and said feed wheel constructed and arranged to retract said feed wheel from its stop position in unison with said edge gage.

6. In a sole fitting machine, a tool for operating upon a sole, a driven feed wheel for feeding the sole relatively to said tool, a head upon which said tool is mounted with provision for movement of said tool relatively to said head in a direction toward and from said roll, a pivotal support for said head having its axis substantially parallel to the axis of said feed roll to provide for yielding movement of said head away from said feed roll to accommodate the thickness of the work, a lever fulcrumed upon said head for controlling the movement of the operating tool relatively to the head, and an operating rod for said lever, said operating rod having its line of pull relatively close to the axis of said pivotal support to avoid transmitting movement to said head.

'7. In a machine for operating upon shoe parts or like articles, a feed wheel having elongated feed teeth disposed obliquely upon its periphery, each of said feed teeth being relatively high at a locality substantially midway between its ends, and the height of each tooth, in the localities adjacent to the ends of the tooth, diminishing toward the adjacent end.

8. In a machine for operating upon shoe parts or like articles, a feed wheel having elongated teeth extending from its periphery, each of said teeth having a ridge which extends lengthwise of the tooth and which is convex in longitudinal section, the end portions of which ridge are lower, with respect to the periphery of the wheel, than the intermediate portion.

9. In a machine for operating upon shoe parts or like articles, a feed wheel having teeth which extend obliquely with respect to their path of movement, each of said teeth having a ridge which extends lengthwise of the tooth and which is convex in longitudinal section, the end portions of which ridge are lower, with respect to the periphery of the wheel, than the intermediate portion.

10. In a machine for operating upon shoe parts or like articles, a feed wheel having obliquely disposed teeth upon its periphery, each of said teeth having a sharp ridge which emerges at each end of the tooth from the peripheral surface of the wheel, said ridge being convexly rounded from one end of the tooth to the other end.

11. In a channeling machine, a grooving knife, a carrier for said knife, a block having an arcuate guide in which said carrier is 'adjustablv seoured, the axis of said arcuate guide passing through the locality occupied by the cutting end I of said knife, whereby the adjustment of the carrier in said arcuate guideway will not affect the cutting end of the knife.

12. In a channeling machine, a grooving knife,

in which the first-mentioned block is a-djustab1y 15 secured, the axis of said arcuate guide passing through the locality occupied by the cutting end 7 of said knife, whereby the adjustment of the firstmentioned block in said arcuate guideway will not affect the position of the cutting end of the knife. Y

14. In a sole fitting machine, a frame, a feed wheel mounted on-said frame, ahead constructed and arranged to carry an operating tool, a pivotal support upon which said headis mounted for swinging movement toward and from said feed Wheel about an axis parallel to the axis of said; I

feed wheel, a lever mountedon said, frame for 'pivotal movement about an axis transverse to the axis of saidpivotal support, a connection between said lever and saidheadand resilient means 'acting through said lever and said connection to' urge said head toward said feed-wheel.

NORWOOD H. KNQWLTON.

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