US2820976A - Rough rounding machines - Google Patents

Description

Jan. 28, 1958 e. w. CLEVERSEY ETAL 2,820,976

RQUGH ROUNDING MACHINES Filed Sept. 26, 1955 5 Sheets-Sheet 1 Jan. 28, 1958 e. w. CLEVERSEY ETAL 2,820,976

, ROUGH aounnmc MACHINES Filed Sept. 26, 1955 v 3 Shegts-Shget 2 [mi/eni ma Gerald W. G/everseg John 5. 1. 71885 By I z.

Jilm- 1958 G. w. CLEVERSEY ETAL 2,32

ROUGH ROUNDING MACHINES 3 Sheets-Sheet 3 Filed Sept. 26, 1955 Inventors Gerald [M fi/everseg John 5. Lgriess United Sttes ROUGH nominate. MACS Gerald W. Cleversey, Topsfield, and Iohn S. Lyness, Naham, Mass., assiwors to United Shoe Machinery Corporation, Flemington, N. 3., and Boston, Mass, a corporation of New Jersey Application September 26, 1955, Serial No. 536,474

16 Claims. (Cl. 12-435) This invention relates to rough rounding machines of thetype disclosed in an application of G. W. Cleversey Serial No. 536,447, filed on September 26, 1955, and is illustrated herein as embodied in a gage mechanism which is disclosed in United States Letters Patent No. 2,799,031, granted on July 16, 1957 upon an application of Lloyd L. Curtin.

In the above-mentioned machine embodying the Curtin gage mechanism, a shoe and a tool head are moved relatively to each other progressively to cause a rounding out to be transferred about the periphery of the shoe, and the tool head and shoe are positioned relatively to each other, to determine the sole edge extension, by a single gage which continuously engages the shoe upper at a constant height above the welt. In order that the sole edge extension shall have the desired width at all points around the shoe, the gage is moved and positioned relatively to the tool head by mechanism including a cam, the operation of which is synchronized with the feeding movement of the work. It is apparent that if the work is invariable in form and the above-mentioned cam is properly designed with reference to the contour of the work which is engaged by the gage, the desired contour will be imparted to the insole when it is rounded.

In most classes of work its form along the contour engaged by the gage is determined by the last and varies so little, from shoe to shoe, as not materially to ailect the accuracy of the rough rounding operation. However, in some classes of work, particularly when a cushion or arch supporting insole is used, the contour of the shoe where it is engaged by the gage may be determined (and distorted if the insole is misplaced) as much by the insole as by the last because such an insole is often located, heightwise of the shoe, at or near the level at which the above-mentioned gage engages the shoe. Consequently, any lateral misplacement of the insole will aifect the shape of the shoe and, hence, the accuracy of the rounding cut. More particularly, if such a misplacement of an inner sole results in a void between it and the shoe upper, the latter will be unsupported against and yield in response to the pressure of the gage, and

the rounding cut will produce a relatively narrow sole edge extension. This condition is aggravated at the inner shank of the shoe where, because of the pronounced slope of the upper, the shoe may be permitted to be'advanced toward the tool farther than it would be at other points where the bearing pressure between the shoe and the gage is more direct.

In view of the foregoing, it is an object of the invention not only to utilize the features of the above-mentioned Curtin gaging mechanism, on account of which a single gaging member is suited for operating upon the convex forepart and heel part portionsof the shoe as well as the concave shank portions of the" shoe, but also to avoid the formation of an excessively narrow sole edge extension because of abnormalitiesin the condition or shape of the shoe upper;

To this end, the invention contemplatestheprvision 2,326,976 Fatented Jan. 28, 1958 in a rounding machine, in which a gage controls a shoe and a tool head while they are relatively moved to cause the rounding cut to be transferred about the periphery of the shoe, of a normally inactive guide which, in accordance with a feature of the invention, is normally biased into engagement with the shoe upper contiguous to the welt crease but which, for a predetermined period during the rounding operation, is locked relatively to the tool head so that the sole edge extension formed upon the sole during the period when the guide is locked cannot be any less than it is where the locking of the guide first takes place. Accordingly, even though the guide will be inefiectual so far as controlling the edge extension of a normally formed shoe is concerned it will, nevertheless, be fixedly positioned in readiness to act instead of the usual gage if, because of a misshapen contour of the shoe, the gaging action afforded by the gage would result in an excessively narrow sole edge extension.

While the invention contemplates the locking of the above-mentioned guide during any desired part of the rounding cut, the guide is most advantageously locked while the rounding cut passes through the shank portion of the shoe for the reasons noted above. More particularly, the locking of the guide, in the illustrated machine, is efiected just before or upon the entry of the rounding out into the inside shank, and upon the departure of the rounding out from the inside shank the guide is unlocked.

The above-mentioned Curtin type of gage has elements which are movable relatively to each other between an extended relation, in which the gage presents a concave work-engaging surface to the work and a collapsed relation in which the elements present a convex work-engaging surface to the work. Thus, the same gage, in one state, is shaped appropriately (concave) for engaging the forepart and heel part and in its convex state, is appropriately shaped to engage the concave shank portions of the shoe. If, as in the instance of the illustrated machine, the above-mentioned guide is used with this Curtin type of gage, it is desirable that the operation of the locking means for the guide be synchronized with the movements of the gage elements between their collapsed and extended relations.

To this end, and in accordance with a further feature of the invention, there is provided in the illustrated machine means for locking the guide in timed relation to one of the collapsing movements of the gage elements, this means also being constructed and arranged to unlock the guide during the succeeding movement of the gage elements into their extended relation.

Invention is also to be recognized in the illustrated locking means for the guide comprising a brake shoe which is movable into and out of engagement with a sliding carrier for the guide, the brake shoe being operated by connections including a compressible member which is normally biased in one direction into an inoperative position but is moved in the opposite direction in synchronism with the collapsing movement of the gage elements to cause the brake shoe to hold the carrier for the guide fixed with respect to the tool head at the desired time.

The above and other objects and features of the invention will next be described in the following detailed description of an illustrative embodiment of the invention and will be defined in the appended claims.

In the drawings,

Fig. 1 is a side elevation of the tool head of a rough rounding machine embodying the invention, as viewed from the left;

Fig. 2 is a front elevation, partly in section, showing the wing gage of the structure of Fig. 1 at an enlarged scale;

Fig. J is aside elevation of the wing gage and its op- Q erating means, as shown in Fig. 1, but at an enlarged scale;

Fig. 4 is a side elevation showing the structure of Fig. 3 as viewed from the opposite, right side;

Fig. 5 is a sectional front elevation, the section being taken along the line V-V in Fig. 3;

Fig. 6 is a plan view of the structure shown in Fig. 3, certain parts thereof having been broken away and shown in section; and

Fig. 7' is a sectional elevation of the structure shown in Fig. 6, the section being taken along the line Vll--VII.

Reference may be made to the above-mentioned Cleversey application for a complete understanding of the parts of the illustrated machine which are common to this and to the prior machine. These parts include a chopping knife 10 which is fixed upon a plunger 12 mounted to reciprocate vertically in the frameld of the tool head. A shoe to be rounded is presented bottomup to the knife 10 with the upper surface of its welt,

or the corresponding surface of theshoe if it is not a welt shoe, seated upon an anvil 16 (Fig. 3) and a Welt support 18, the upper surfaces of the anvil and support being flush with each other. The anvil is integral with a plate 20 which is fixed to the frame 14. The shoe is urged against the anvil and welt support by a bottom rest 22 (Fig. 1) which is spring biased downwardly and may be retracted into its inoperative position by moving a handle 24 rearwardly.

A shoe to be rounded is supported upon an automatically operated jack (not shown herein, but fully disclosed in the above-mentioned Cleversey application) to which is imparted a gyratory movement to cause the periphery of the shoe to be progressively presented to the knife in a direction which is always tangent to the periphery of the shoe at the point of operation of the knife thereupon.

The amount of the sole edge extension is controlled by a wing gage 26 which constitutes the principal sub ject matter of and is claimed in the above-mentioned Curtin patent. This gage comprises a left wing 28 (Figs. 2 and 6) and a right wing 30 which are so shaped and mounted as to be capable of presenting either a concave or a convex work-engaging surface to the work, depending upon whether the work is convex or concave, respectively. The position of the gage 26 relatively to the knife 10, which determines the sole edge extension formed by the rounding cut, is controlled by gage operating means, driven as in the above-mentioned Cleversey machine and including a cam shaft 32 (Figs. 1 and 6) which is continuously rotated in synchronism with the movement of the jack.

Referring now to the construction and mounting of the gage 26, the wing 28 (Figs. 2 and 7) has a hollow shank 34 which is freely rotatable within a similar shank 36 for the wing 30, the latter being freely rotatable in a slide 38. This slide is freely movable forwardly and rearwardly of the machine between the plate 20 and a pair of gibs 40 (Figs. 5 and 6) which are fixed to the plate. The slide 38 is constantly biased rearwardly by a spring 42 (Figs. 1 and 3), connecting the slide and the left hand gib. 40, so as to maintain a roll 44 constantly in engagement with a cam 46 which is fixed to the above-mentioned cam shaft 32. The roll 44 is rotatably mounted upon a stud-48 (Fig. 7) which is fixed upon a slide 50, the latter being mounted for adjustment upon the slide 38 lengthwise thereof. A rearward portion of the slide 50 is received between the head and a shoulder 52 on a screw 54 which is threaded in the slide 38, so. that by turning the screw 54, the roll 44 always remaining in engagement with the cam 46, the spacing of the'winggage 26,.from the knife 10 can be varied at will, according to the amount of sole edge extension required. A spring pressed detent 55 is mounted to slide upon-Iabracket fixed to the slide 50 into any' one of a number of recesses formed in the head of the screw 54, to hold the latter in adjusted position.

When a rounding operation is started the periphery of the cam 46 is engaged by the roll 44 at the radius A (Fig. 6), and at this time the knife operates upon the sole at the outer shank of the shoe not far from the ball line. For each cycle of operation of the machine the cam 46 makes one complete revolution and in doing so presents portions of varying radii to the roll 44, whereby the gage 26 is variably positioned according to the different amounts of sole edge extension which the shoe is to have at different points about its periphery.

The wings 28, 30, as viewed in plan (Fig.6) are segmental in form, and the rim of each wing is recessed to receive the other, as shown in Fig. 2,.except at the central portion of the gage. Here, the rims of the wings are seated upon each other without overlapping each other and are slightly rounded heightwise, as illustrated in Figs. 3 and 7. The upper half of this rounded surface at the central portion of the gage is on the wing 28, and the lower half is on the wing 30. The inner portions of the wings 28, 30, that is, those portions which'overlap each other more or less, are circular and concentric with the common axis of their shanks 34, 38. At the outer portions of the wings 28, 30 their work-engaging surfaces become tangential to their circular portions, as illustrated in Fig. 6, this portion of the wing 28 being provided with a lip 56 which overlaps the circular portion of the wing 30. Similarly, the wing 30 is provided with a lip 58 which overlaps the circular portion of the wing 28. The upper surfaces of the wings at their outer ends are cham feted as at 59 (Figs. 3 and 4) so that the upper surface of the gage is slightly convex lengthwise thereof and accommodates the concavity of the upper margin of the sole of a shoe as viewed sidewise.

The illustrated gage 26 is designed to position the tool head and shoe throughout the entire rounding operation by continual engagement with the shoe along one contour at a constant distance above the welt, whereby the well known difiiculties of. effecting an interchange of a crease guide, engaging the shoe at one level, and of a forepart gage, engaging the shoe at a different level, are avoided. When convex portions of the shoe, such as the forepart and heel part, are presented to the gage, the wings 28, 30 are held in an extended relation, as illustrated in broken lines in Fig. 6, giving a concave configuration to the gage as viewed in plan and, with the wings in this position, a portion of the shoe having a relatively long radius of curvature is engaged at spaced points by the lips 56, 58. Convex portions of the shoe having a small radius of curvature, such as. its toe and heel ends, will engage only the central portion of the gage including the circular portions of the wings which are between the lips.

When concave portions of the shoe, such as its shank portions, are presented to the gage 26, the wings 28, 30 are held in a collapsed relation, as illustrated in full lines in Fig. 6, giving a convex configuration to the gage as viewed in plan and, at such times, only the circular portions of the wings at the central portion of the'gage engage the shoe. Throughout a rounding operation, the wings are not only held for certain periods in each of the relations above described, but are automatically swung,- by mechanism next to be described, from one relation to the other, in synchronism with both the movement of the shoe and the movement, of the gage which affects the sole edge extension. This mechanism also is so constructed as to permit the gage 26 to swing freely in response to the bearing pressure of the shoe thereagainst, without affecting the relation of the wings to each other.

The wings 28, 30 are connected by links 60, 62 (Figs. 6 and 3), respectively, to arms 64, 66, .the armp66 having a hollow shank 68 within which is freely rotatable a tubular;.shank-70 for the arm 64s The shank. 68 is mounted to rotate freely within the slide 38. and has. formed therein two, opposed-and oppositely inclined slots 7,2, 72

asaaars (Figs. 7 and'3). Similar oppositely inclined slots 74, 74 are formed in the shank 79, and through all these slots there extends a cross pin 76 which is carried by a plunger 78 mounted to slide axially within the shank 7%. The plunger 78 is mounted, by means of a shouldered screw 80, to swivel freely upon a bar 82 which is fixed to the lower end of a plunger 34, the latter being mounted to slide freely in a hole in the slide 33 and carrying a cross pin 86 which projects through a slot in the slide 38. Pivotally mounted upon each end of the cross pin 86 is a square block 9i) (Figs. 3 and 4). These blocks are received in slots formed in the forward ends of arms @2, 92 the former being pinned upon the left hand end of a sleeve 94, the sleeve being rotatably mounted within the slide 38. The other arm is integral with the right hand end of the sleeve, and to this arm there is secured by a pin 95 (Pig. 4) a segmental gear 96 which is held in assembled relation to the sleeve by a bolt 3 passing through the sleeve. A pinion lull meshes with the segmental gear 96 and is pinned to a shaft 192 which is rotatably supported at its forward end by a bearing the attached to the slide 38.

It will now be evident that when the shaft 192 is rotated, in one direction or the other, the cross pin 76 will be raised or lowered with respect to the shanks 63, 75} and that, through the camming action between the cross pin 76 and the inclined slots 72, i2 and 74, 7 the arms 64, 66 will be swung so as to cause the wings 23, Fall to be moved between their extended and collapsed positions. Similarly, the wings will be held in a certain position, by the connections just described, for any position of the shaft 102 which is maintained.

A washer i635 seated upon the shank 68 has a small projection which engages the lower side of the plate 2d and serves as an anti-friction bearing when the cross pin 76 is raised. A similar Washer N5 is seated upon the shank 7G and has a projection which seats upon the bottom of a recess in the washer 195.

The shaft 192 is driven by and is received within a sleeve 19,6 (Fig. 4) which at its rearward end has a splined collar 1%8 which receives a complemental splined enlargement lit) formed upon the rear end of the shaft 102.. Thus, the gear lllil and shaft hi2 move with the slide 38Without affecting the driving relation between the sleeve 106 and the shaft 192. To the sleeve 1% there is secured by a key 112 a pinion 11- which is rotatably mounted in a bracket 115, the latter being fixed by screws 118 to the plate 2% The pinion 114 is driven by a segmental gear 128 which is fixed upon th lower end of a shaft 122;, the latter being rotatably mounted in the bracket 116 and having fixed thereto an arm upon the outer end of which is rotatably mounted a roll 3.2-5. This roll engages a cam 128 (Figs. 6 and 1) which is fixed upon the cam shaft 32 and, as will be described later, is so shaped as to cause, through the connections just described, the gage wings 28, 30 to be moved between or to be held in their collapsed and extended positions. The roll 226 is biased against the cam 12% by a spring which is stretched between a strut E32 (Figs. 4 and 5), which is fixed upon the bracket 116 by the screws 11-3, and an arm 134- which is clamped upon the sleeve When the portion of the cam 128 between the radii A and B (Fig. 6) is presented to the roll 125, the wings 28, 30 are moved from a partially extended relation into their fully extended relation, the latter relation being maintained throughout the angle between the radii B and (I, which portion of the cam is circular. During this period, the rounding out is transferred around the forepart from the outer ball line to a point in the inner shank, beyond the inner ball line, where the sole edge begins to straighten, that is, to change from a convex curvature to a concave curvature. The next falling slope of the cam 123, just beyond the radius C, is now presented to the roll 126, and the wings 28, 30' are moved from their fully extencled relation into their fully collapsed relation (solid lines-Fig. 6). As the rounding cut begins to run out of the concave inner shank portion of the shoe toward the heel part, a rising slope on the cam 128, succeeding the above-mentioned falling slope and terminating at radius D, causes the wings 28, 30 to be moved into their fully extended relation (broken linesFig. 6). As the next concentric portion of the cam 12%, beginning at the radius D, is presented to the roll 126, the rounding out is being transferred around the heel of the shoe, and the wings 28, 3d are constantly held in their fully extended relation because of the circular form of this portion of the cam. However, by the time the rounding cut approaches closely the portion of the outside shank of the shoe which is concave, the circular portion of the cam 128 between radii D and E passes beyond the roll 126, and a falling slope of the cam just beyond radius E causes the wings 23, St to be moved into a collapsed relation, appropriate for guiding the shoe by contact with a concave portion thereof. Since the concavity of the sole edge in the outer shank is not as extreme as it is in the inner shank, the wings 23, 3f? are not at this time moved into their completely collapsed relation and, after receiving their total collapsing movement, are moved somewhat toward their extended relation before the machine comes to rest at the end of its cycle, with the cam 128 again engaged by the roll 1'26 at the radius A.

The above-mentioned anvil 15 (Figs. 6 and 7) has a shallow circular recess the forward edge of which constitutes a shearing edge I135 arranged to cooperate with the knife it the stroke of the latter being so arranged that the cutting edge of the knife, at the bottom of its stroke, is below the upper surface of the anvil. A disk 136, slight- 1y smaller than the above-rnentioned recess, is soldered therein flush with the upper surface of the anvil and so as to leave a thin crescent-shaped opening behind the shearing edge 135 for receiving the knife. The welt support 18 is mounted for movement forwardly and rearwardly of the anvil l5 and is biased forwardly into constant engagement with the side of the upper of a shoe being rounded under the guidance of the gage 2 5. Accordingly, as the gage 25 is moved to vary the sole edge extension, the shoe Will cause or permit a corresponding movement of the welt support 18. Thus, the welt support always engages the side of the shoe upper adjacent to the welt crease and supports the welt of the shoe across its entire exposed width.

The welt support is secured by screws 138 upon the forward end of a carrier 14% winch is mounted to slide freely forwardly and rearwardly of the tool head in a recess between the slide 38 (Fig. 5) and a pair of depending fianges 142 which are integral with the plate 29. To the left-hand side of the carrier 149 there is fixed a lug 144 which protrudes through an opening in the slide 33 and is bored to receive a sliding rod I146 (Fig. 3) for which there is provided an abutment screw M3, the latter being threaded in a bracket 1543 fixed upon the left-hand side of the slide A spring 152 is compressed between the lug 144 and a head on the rod 146 and, acting upon the lug 144, causes the welt support 13 to be biased forwardly into engagement with the side of a shoe being operated upon.

it will be understood that, because the gage 26 engages the shoe at a constant distance above the welt, the cam 45 must be designed to compensate for the difference between the curvature of the shoe where it is engaged by the gage 26 and the desired contour of the sole edge. That is, the overhanging relation of the shoe at the inner shank of the sole requires that the cam 46 have a considerably smaller radius in that portion of its periphery which determines the position of the gage when the rounding cut is transferred aiongthe inner shank than elsewhere, in order that the desired soleedge extension will be produced at this part of the shoe. in some classes of work as, for. example, when a cushion insole or an arch supporting insole is used, a slight misplacement laterally of the last of such an insole, will cause a distortion in the heightwise curvature of the shoes where it is engaged by the gage 26. Because of the pronounced heightwise slope of the inner shank, a slight distortion of the type just referred to will have an appreciable effect upon the guiding action of the gage 26. If, for this reason, the sole edge is rounded with an excessively wide extension, it may be reduced to the desired amount by the final edge trimming operation. However, it is evident that an excessively narrow extension cannot be thus corrected.

To insure against an excessively narrow sole edge extension being formed, particularly at the inner shank, provision has been made in the illustrated machine for utilizing the welt sup ort 18 as a crease guide in such cases when the guide 26, because of an abnormal shape of the shoe, would cause the rounding out to be made too close to the shoe upper.

To this end, the welt support 18 is locked relatively to the anvil 16, in whatever position it occupies as the rounding cut passes into the inside shank. by me hanism operated by a brake cam 154, which is fixed to the cam 128 between the radii C and D. Approximately as, or just before the rounding cut pas es the inner ball line of the shoe, the cam 154 strikes a roll 156 which, through the mechanism next to be described, causes a pair of brake shoes 158 (Figs. 6 and 7) to clamp the carrierl fi for the welt support 18 to the flanges 142 of the plate 20.

The roll 156 is mounted upon a holder 160 which is adjustably secured by a screw 162 upon-the bottom side of a bar 164, the latter being supported at its rearward end by and being arranged to slide upon a stud 166. This stud is fixed upon a plate 168 which is secured to the rear endof the plate 20, and a spring 170 compressed between ,the plate 168 and the bar 164 normally bia es the latter into engagement with the head of the stud. The bar 164 has formed therein a T slot which slidably receives a member 172 having threaded therein a screw 174 the head of which extends throu h a circular hole 176 in the bar 164. When the bar 164 is in its normal, rearmost position, the member 172 is biased forwardly by a spring 178,

which is compressed between the member 172 and the bar 164, so as to bring the screw 174 into abutting relation with the bar 164 at the forward side of the hole 176. Upon a pin 180 carried by the member 172 there are pivotally mounted a pair of toggle links 182 which at their outer ends are pivoted upon the brake shoes 158, the latter being mounted to move freely toward and away from each other in slots formed in the flanges 142, the slots being just large enough to receive the shoes.

The construction and arrangement of the parts just described is such that when the bar 164 is in its normal rearmost and inoperative position no presure is exerted by the shoes 158 upon the carrier 140. Accordingly, ex-

cept when the cam 154 displaces the roll 156, the carrier 140, and hence the welt support 18, is free to slide under H the impulse of the spring 152., and will be maintained in engagement with the side of the shoe upper. However, when the roll 156 is displaced forwardly by the cam 154, overcoming the spring 171 the bar 164 is advanced to cause the spring 178 yieldingly to advance the member .172, whereby the toggle links 182 are straightened and the shoes 158 are forced against the carrier 140 so as frictionally to lock the carrier to the flanges 142. Yielding movement of the bar 164 in excess of that required to efiect the locking of the carrier 140 is permitted by the clearance between the rearward sides of the screw 174 and hole 176. As soon as the cam 154 moves away from the roll 156, the bar 164 is restored to its normal rearmost position by the spring 170, and the braking pressure between the shoes 158 and the carrier, 140 is removed with no apreciable movement of the shoes away from the carrier.

The use and operation of-the illustrated machine'will now-be briefly-summarized.

A shoe is presented to the tool head with its bottom uppermost andengaged by the bottom rest 22 which causes the upper surface of the welt of the shoe to be seated upon the anvil 16 and welt suport 18. The tool head is bodily biased toward the shoe, as disclosed in the above-mentioned Cleversey application, to maintain the wing gage 26 in contact with the shoe upper, the shoe being supoprted by the jack which is moved so as progressively to present the periphery of the sole to the knife 10.

The rounding out is begun near the outer heel-breast line of the shoe and progresses forwardly thereof through the outer shank, around the forepart, through the inner shank and around the heel part to the starting point.

The wing gage 26 at the beginning of the cut is collapsed somewhat and is moved toward its extended state as the rounding out emerges from the outer shank of the shoe. When the rounding cut passes out of the outer shank, the elements 28, 30 of the gage will have been moved into their fully extended relation, giving the gage a concave formation appropriate for the convex curvature of the forepart. When the rounding cut enters that portion of the shoe in the vicinity of the inner ball line, where the curvature of the sole edge changes from convex to concave, the gage elements 28, 30 are moved to their fully collapsed relation, imparting to the gage a convex form appropriate for engaging the concave inner shank portion of the shoe.

Throughout the rounding out the wing gage 26 is positioned with respect to the knife 10, so as to control the sole edge extension, by the above described connections which are operated by the cam 46, all the gage mechanism which has been summarized up to this point constituting the princi al subject matter of, and being claimed in the above-mentioned Curtin patent.

The welt support 18 is biased into constant engagement with the side of the shoe by the spring 152 while the rounding cut traverses the outside portion of the shank of the shoe and its forepart. However, when or just before the rounding out passes into the inner shank and a falling slope of the cam 128, just beyond the radius C, is presented to the roll 126 to impart collapsing movement to the gage wings 28, 30, the cam 154 acts upon the roll 156 to cause the welt support 18 to be locked against movement upon the tool head.

Since the welt supoprt 18 is positioned by its engagement with the shoe just before it is locked, the sole edge extension can be no less during the period in which the supoprt is fixed upon the tool head than it was at the time when the locking took place. Accordingly, if because of an abnormality in the shoe in the inner shank, the wing gage 26 would permit the sole edge extension to be excessively narrow, the welt support 18 will act as a guide or gage for preventing the sole edge extension from being any less than it is where the locking of the welt support took place.

The locking of the welt support 18 is efiected in response to forward movement of the bar 164 which, in being advanced against the resistance of the spring 170, acts upon the spring 178 to cause the toggle 182, 182 to be straightened sufficiently to press the shoes 158, 158, againt the carrier 140. The locked state of the carrier and welt support is maintained while the rounding cut traverse the inner shank, the cam 154 being presented to the roll 156 throughout this period. However, when the rounding cut emerges from the inner shank the cam 154 leaves the roll 156, and the bar 164 is returned to its in-. operative position, determined by the stud 166, under the influence of the spring 170. Dining the first part of this return movement of the bar 164, clearance between the forward sides of the screw 174 and hole 176 is eliminated and, thereafter, the member 172 is moved rear wardly with the bar 164 to collapse the toggle 182.cnough to retract the shoes 158- from the. carrier 140.1 The-slat,

ter is now free to slide in the tool head so that the welt support 18 may continuously be biased by the spring 152 into contact with the shoe upper throughout the remainder of the rounding out which is under the control of the wing gage 26.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United State is:

I. In an automatic rough rounding machine in which a tool head and a shoe are relatively moved progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, a gage for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, a guide mounted upon said head for yielding movement within the welt crease of the shoe into engagement with the side of the upper contiguous thereto, and means for locking said guide against movement on said tool head While the rounding cut traverses a predetermined portion of the periphery of the shoe.

2. In an automatic rough rounding machne in which a tool head and a shoe are relatively moved to cause the point of operation of the tool head upon the shoe to be progressively transferred about the periphery of its sole, a gage carried by said head for relatively positioning the shoe and the tool head to control the sole edge extension formed by the rounding cut, a guide adapted to engage contiguous portions of the upper and of the upper margin of the some at each side of the welt crease, said guide being mounted upon said head to slide freely transversely of the direction of the rounding out into engagement with the shoe upper, and means for locking said guide against movement upon said head at a predetermined stage of the rounding cut.

3. In an automatic rough rounding machine in which a tool head and a shoe are relatively moved to cause the point of operation of the tool head upon the shoe to be progressively transferred around the periphery of its sole, a gage for relatively positioning the tool head and shoe by engagement with the shoe upper adjacent to the welt crease, operating means for said gage for varying its position to control the sole edge extension formed by the rounding cut, a guide mounted upon said head for yielding movement within the welt crease into engagement with the side of the shoe upper, and mechanism for locking said guide against movement with respect to said tool head in timed relation to the operation of said gage operating means.

4. In a rough rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding out made by the tool head upon the sole about the periphery thereof, a gage mounted upon said head for positioning it with respect to the shoe, said gage having elements mounted for movement relatively to each other between an extended and a collapsed relation in which the gage presents a concave and a convex Work engaging surface, respectively, to the shoe, gage operating mechanism for moving said elements between their extended and collapsed relations, a guide mounted upon said head for yielding movement into engagement with the side of the upper of the shoe contiguous to its welt crease, and means operated in synchronism with said gage operating means for locking said guide against movement on said tool head While the rounding out traverses a predetermined portion of the shoe.

5. In a sole rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding cut made by the tool head upon the sole about the periphery thereof, a gage mounted upon said head for positioning it with respect to the shoe, said gage having elements mounted for movement relatively to each other between an extended and a collapsed relation in which the gage presents a concave and a convex work engaging surface, respectively, to the shoe, gage operating mechanism for moving said elements between their extended and collapsed relations, a guide mounted upon said head for yielding movement into engagement with the side of the upper of the shoecontiguous to its welt crease, and means for locking said guide against move ment on said tool head in timed relation to the movement of said gage elements into their collapsed relation.

6. In a sole rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding out made by the tool head upon the sole about the periphery thereof, a gage mounted upon said head for positioning it with respect to the shoe, said gage having elements mounted for movement relatively to each other between an extended and a collapsed relation in which the gage presents a concave andaconvex work engaging surface, respectively, to the shoe, gage operating mechanism for moving said elements between their extended and collapsed relations, a guide mounted upon said head for yielding movement into engagement with the side of the upper of the shoe contiguous to its Welt crease, and means operated in timed relation to alternate movements of said gage elements from their extended relation to their collapsed relation for locking said. guide against movement on said tool head as the rounding out enters the inner shank portion of the shoe.

7. In a sole rounding machine having a tool head and a shoe support which are relatively movable to cause the point of operation of said head upon a shoe. on said support to be progressively transferred about the periphery of the shoe, a gage having elements mounted for movement relatively to each other between an extended and a collapsed relation in which the gage presents a concave and convex work-engaging surface, respectively, to the shoe, mechanism for moving said elements between their extended and collapsed relations, a guide mounted upon said head for sliding movement into contact with the side of the shoe upper contiguous to the Welt crease, means for holding said guide yieldingly against the shoe upper, and means for locking said guide against movement upon said tool head during alternate periods in which the elements, of said gage are disposed in, their collapsed relation.

8. In a rough rounding machine having a tool head to which a shoe is presented progressively to transfer the rounding cut made by the tool head on the shoe about the periphery of its sole, a gage mounted upon said tool head for positioning it with respect to the shoe, a guide mounted upon said head for sliding movement within the Welt crease of the shoe into engagement with the portion of the upper contiguous thereto, locking means for said guide, and means for operating said locking means to lock said guide upon and to release it from said tool head when the rounding cut enters and departs from, respectively, a shank portion of the shoe.

9. In a rough rounding machine having a too-l head to which a shoe is presented progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, a gage mounted upon said head for positioning it with respect to the shoe, a guide mounted upon said head for sliding movement within the welt crease of the shoe into engagement with the side of the shoe upper contiguous thereto, and means for locking said guide upon said tool head upon the entry of the rounding out into the inside shank portion of the shoe, said means being arranged to unlock said guide upon the emergence of the rounding out from the said shank portion of the shoe.

10. In a rough rounding machine having a tool head to which a shoe is presented progressively to transfer the point of operation of the tool head on the shoe about the periphery of its sole, a gage mounted upon said head for relatively positioning it and the shoe to control the sole edge extension formed by the rounding cut, mechanism for moving said gage with respect to said head to vary the sole edge extension, a guide mounted upon said head for sliding movement into engagement with the side 11 of the shoe uppercontiguous to the welt crease of the shoe, means for biasing said guide into contact with the shoe upper, and means for locking said guide-against movement upon said head in timed relation to the operation of said mechanism while the rounding cut passes through the inner shank portion of the shoe.

11. In a rough rounding machine comprising a tool head to which a shoe is presented progressively totransfer the rounding cut made by the tool head upon the sole about its periphery, a gage mounted upon said head for relatively positioning it and the shoe to determine the sole edge extension formed by the rounding cut, gage operating means for moving said gage with respect to said tool head in timed relation to the progress of the rounding cut to vary the sole edge extension, a guide mounted upon said head for movement into engagement with the shoe upper adjacent to the, welt crease, means for biasing said guide into contact with the shoe, means for locking said guide against, movement upon s"id tool head comprising a brake shoe, operating means for said brake shoe ccmprising a toggle and a slide connected to said toggle, means for biasing said slide in one direction to render said brake shoe inoperative, and means operated in timed relation to the operation of said gage o erating means for moving said slide in the opposite direction to cause said guide to be locked against movement upon said tool head by said shoe.

12. In an automatic rough rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding cut made by the tool head upon the shoe about the periphery of its sole, a gage mounted upon said head for positioning it with respect to the shoe to determine the sole edge extension, said' gage having elements mounted for movement relatively to each other between an extended and a collapsed relation in which the gage presents a concave and convex work-engaging surface, respectively, to the shoe, gage operating mechanism for moving said elements between their extended and collapsed relations, a guide mounted upon said head for yielding movement into engagement with the side of the shoe upper contiguous to its Welt crease, means for locking said guide against movement on said tool head comprising a compressible member, means for biasing said member in one direction into an inoperative position, and means for moving said member in the opposite direction in synchronism with the movement of said gage elements into their collapsed relation to cause the locking means to fix said guide with respect to said tool head While the rounding cut traverses a shank portion of the sole.

13. In an automatic rough rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding out made by the tool head upon the shoe about the periphery of its sole, a gage mounted upon said head for relatively positioning it and the shoe to determine the sole edge extension formed by the rounding cut, a guide mounted for movement upon said head into engagement with the side of the shoe upper contiguous to the welt crease, a carrier tor said guide, means for biasing said carrier toward the shoe whereby said guide is yieldingly held in contact with the shoe upper, a brake shoe mounted in said tool head for movement into and out of engagement with said carrier, and means for holding said brake shoe against said carrier to lock said guide with respect to said tool head while the rounding cut traverses the inner shank portion of the shoe.

14. In an automatic rough rounding machine comprising a tool head to which a shoe is presented progressively to transfer the rounding out made by the tool head upon the shoe about the periphery of its sole, a gagemounted upon said head'for relatively positioning it and the shoe to determine "the sole edge extension formed by the rounding cut, a guide mounted for movement upon said head'into engagement with the side of the shoe upper con-' tiguous to the welt crease, a carrier for said guide, means for biasing said carrier toward the shoe whereby said guide is yieldingly held in contact with th'e'shoe upper, a brake shoe for locking said carrierto' saidtoolihead, and means for operating said brake shoe comprising a slide, means for moving said slide alternately in'opposite directions at the beginning and end of a predetermined portion of the rounding cut, and connections between said slide and said brake shoe for pressing said brake shoe against said carrier in response to movement of said slide in one direction and for retracting said, brake shoe from said carrierinresponse to mov ment of said slide in the opposite direction. t Y z 15. In a rough rounding machine comprising a tool head to which a shoe is presented progressively to'transfer the rounding cut made by the tool head upon the sole about the periphery thereof, a gage'for relatively positioning the shoe and said tool head to control the sole edge extension, a, guide arranged to engage the shoe upper within the welt crease, a carrier for said guide mounted upon said tool' head for movement toward and away from the shoe, means for biasing said carrier toward the shoe whereby said guide is yieldingly held; v

in said tool head for movement into engagement with said carrier to fix said carrier and guide with respect to said tool head, operating means for said brake shoes comprising a toggle connecting said shoes and a compressible member connected to said toggle, and means for operating said member alternately in opposite directions at predetermined stages of the rounding cut successively to straighten and collapse saidtogglewhereby sald carrier and guide are locked againstand freed for move ment, respectively, with respect to said tool head. 7

16. In a rough rounding machine comprising'a tool head to which a shoe is presented progressively totransfer the rounding out made by the tool head upon the sole about its periphery, a gage for positioning theshoe with respect to said tool head, gage operating means for moving said gage with respect to said head to'control the sole edge extension, a welt supporting guide arranged to engage the shoe upperwithin the welt crease, a carrier for said guide mounted upon said tool .head'for'movement toward and away from the shoe presented thereto, means for biasing said carrier toward the shoe whereby said guide is yieldingly held against the: shoe upper, a brake shoe mounted for movement in said tooljhead into engagement with said carrier to cause saidi-guide to be fixed with respect to said tool head, operating means for said brake shoe comprising a compressible slide composed of two members one of which is connected. to said brake shoe, the other of said members being biased so as to retract said brake shoe from said carrier,=a spring interposed between said members for biasing them apart and tending to cause said shoe to be moved toward said carrier, a stop cooperating with said members'to determine their extended relation, and means acting upon said compressible slide in synchronism with said gage operating means for successively locking said .carrier to, and releasing it from, said tool head at the beginning and end, respectively, of a predetermined portion of the rounding cut.

References Cited in the file of this patent UNITED STATES PATENTS 1,118,484 Fowler Nov. 24,1914

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