US2799031A - Rough rounding machine gage - Google Patents

Description

July 16, 1957 CURTIN ROUGH ROUNDING MACHINE GAGE :5 Shets-Sheet 1 Filed Sept. 26. 1955 Inventor Lloyd L. Cur-fin July 16, 1957 1.. CURTIN 2,799,031

ROUGH ROUNDING MACHINE GAGE 6 Filed Sept. 26, 1955 3 Sheets-Sheet 2 1E; 42 I52 gr; 40 /44 Lloyd L. Curfin Inventor.

July 16, 1957 Filed Sept. 26, 1955 L. L. CURTlN ROUGH ROUNDING MACHINE GAGE 5 Sheets-Sheet 3 United States PatentO ROUGH ROUNDING MACHINE GAGE Lloyd L. Curtin, Towson, Md., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application September 26, 1955, Serial No. 536,484

21 Claims. (CI. 12-85) This invention relates to rough rounding machines, and is illustrated herein as embodied in an improved gage mechanism adapted for use in a machine of the type disclosed in an application for United States Letters Patent of G. W. Cleversey, Serial No. 536,447, filed on September 26, 1955.

The above-mentioned Cleversey machine is typical of rough rounding machines in that it has a crease guide for positioning a shoe relatively to the rounding tool, while the rounding cut passes through the shank portions of the shoe, and a separate forepart gage which positions the shoe relatively to the tool while its forepart is being rounded by'engagement with the shoe upper at a height above the welt which is different from that at which the shoe is engaged by the crease guide. The crease guide and the forepart gage are moved toward and away from the rounding tool, to vary the sole edge extension as required by the style of the shoe, the positions of the guide and gage being, in each case, under the control of a cam. It is evident that these two cams must be accurately designed with reference to each other and to the shape of the shoes to be operated upon in order to effect the desired sole edge extension, in view of the different contours of the shoe along which the gage and guide engage the shoe, as well as the fact that the gage and guide must be selectively brought into operative relation to the shoe at the desired times without producing an irregularity in the sole edge when an interchange of the guide and gage is made.

It is advantageous that, as in the prior Cleversey machine, the forepart gage have a work-engaging surface which is concave lengthwise thereof to obtain the best possible gaging action throughout the forepart portion of the shoe, all parts of which present a convex contour to the forepart gage. Moreover, the concavity of the gage is such as to cause it to engage the shoe at spaced points where the curvature of the shoe is the least, as at the sides of the shoe in the vicinity of the tip line, and this feature of the gage, together with the fact that it is mounted to swing freely in response to the pressure of the shoe thereagainst, prevent the formation of any perceptible jog in the rounding cut when the portion of the shoe including the tip line is presented to the gage.

It is evident, furthermore, that the concave form of the forepart gage is unsuitable for a gaging member which, like the usual crease guide, is required to act upon the concave shank portions of the shoe.

With a view to utilizing the above-mentioned desirable features in a gaging mechanism, and avoiding the prior practice of using a forepart gage and a separate crease guide which must be interchanged, there is provided by the present invention, in accordance with one feature thererelation, in which the gage has a convex conformation 2,799,031 Patented July 16, 1957 suitable for engaging the concave shank portions of the shoe.

As embodied in the illustrated machine, in which a shoe on a jack and the rounding tool are moved relatively to each other to transfer the operation of the tool upon the shoe about its periphery, the above-mentioned gage elements are moved between their extended and collapsed relation by mechanism which, in accordance with a further feature of the invention, is operated, in timed relation to the progress of the rounding out about the shoe, to move the gage elements into their extended relation upon each emergence of the rounding cut from the shank of the shoe, and to move the elements into their collapsed relation upon or just before each entry of the rounding cut into the shank portions of the shoe. With a gage construction of the type set forth above, a single gage performs the entire guiding action which is under the control of only one cam, instead of the two cams which are necessary for the control and operation of a forepart gage and a .separate crease guide.

Although the gage operating mechanism of the illustrated machine for moving the gage elements between their extended and collapsed relations employs a cam, the requirements upon which its shape is based are not so critical as to require more than one cam for all styles and sizes of shoes. Accordingly, it is necessary to change only one cam in the illustrated machine because of a change in the style of the work which is presented thereto.

The above and other 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. l at an enlarged scale;

Fig. 3 is a side elevation of the wing gage and its operating 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 VV 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 VIIVII.

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 frame 14 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 the shoe 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. l) 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 novel wing gage 26 comprising a left wing 23 (Figs. 2 and 6) and a right wing 36 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 14?, 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 3?. (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 36, the latter being freely rotatable in a slide 33. This slide is freely movable forwardly and rearwardly of the machine between the plate 20 and a pair of gibs 40 (Figs. 4 and 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 46, so as to maintain a roll 44 constantly in engagement with a cam 46 which is fixed to the abovementioned 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 wing gage 26 from the knife 16 can be varied at will, according to the amount of sole edge extension required. A spring pressed detent 55 is mounted to slide upon. a bracket fixed to the slide 59 into any one of a number of recesses formed in the head of the screw 54, to hold the latter in adiusted 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 36. The inner portions of the wings 28, 36, that is, those portions which overlap each other more or less, are circular and concentric with the common axis of their shanks 34, 36. Atthe outer portions of the wings 28, 39 their workengaging 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 chamfered 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 sidew1se.

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 difficulties 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 arm 66 having a hollow shank 68 within which is freely rotatable a tubular shank 70 for the arm 64. The shank 68 is mounted to rotate freely within the slide 38 and has formed therein two opposed and oppositely inclined slots 72, 72 (Figs. 7 and 3). Similar oppositely inclined slots 74, 74 are formed in the shank 70, 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 70. The plunger 78 is mounted, by means of a shouldered screw 80, to swivel freely upon a bar 32 which is fixed to the lower end of a plunger 84, the latter being mounted to slide freely in a hole in the slide 38 and carrying a cross pin 86 which projects through a slot 88 in the slide 38. Pivotally mounted upon each end of the cross pin 86 is a square block 90 (Figs. 3 and 4). These blocks are received in slots formed in the forward ends of arms 92, 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 92 is integral with the right-hand end of the sleeve, and to this arm there is secured by a pin 95 (Fig. 4) a segmental gear 96 which is held in assembled relation to the sleeve by a bolt 98 passing through the sleeve. A pinion 100 meshes with the segmental gear 96 and is pinned to a shaft 102 which is rotatably supported at its forward end by a bearing 104- attached to the slide 38.

It will now "be evident that when the shaft 102 is rotated, in one direction or the other, the cross pin 76 will be raised or lowered with respect to the shanks 68, 7t and that, through the camming action between the cross pin 76 and the inclined slots 72, 72 and 74, 74 the arms 64, 66 will be swung so as to cause the Wings 28, 30 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 105 seated upon the shank 63 has a small projection which engages the lower side of the plate 20 and serves as an anti-friction bearing when the cross pin '5 76 is raised. A similar washer 105 is seated upon the shank 70 and has a projection which seats upon the bottom of a recess in the washer 105.

The shaft 102 is driven by and is received within a sleeve 106 (Fig. 4) which at its rearward end has a splined collar 108 which receives a complemental splined enlargement 110 formed upon the rear end of the shaft 102. Thus, the pinion 100 and shaft 102 move with the slide 38 without affecting the driving relation between the sleeve 106 and the shaft 102. To the sleeve 106 there is secured by a key 112 a pinion 114 which is rotatably mounted in a bracket 116, the latter being fixed by screws 118 to the plate 20. The pinion 114 is driven by a segmental gear 120 which is fixed upon the lower end of a shaft 122, the latter being rotatably mounted in the bracket 116 and having fixed thereto an arm 124 upon the outer end of which is rotatably mounted a roll 126. 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 126 is biased against the cam 128 by a spring 130 which is stretched between a strut 132 (Figs. 4 and which is fixed upon the bracket 116 by the screws 118, and an arm 134 which is clamped upon the sleeve 106.

When the portion of the cam 128 between the radii A and B (Fig. 6) is presented to the roll 126, 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 C, which Portion of the cam is circular. During this period, the rounding cut 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 128, just beyond the radius C, is now presented to the roll 126, and the wings 28, 30 are moved from their fully extended 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 lines, Fig. 6). As the next concentric portion of the cam 128, 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, 30 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 28, 30 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 28, 30 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 126 at the radius A.

' The illustrative machine includes, with the gage structure described above, means for causing the welt support 18 to act as a crease guide and to position the tool head and shoe relatively to eachother while the rounding cut passes through the inner shank portion of the shoe if, because of an abnormality in the shape of the shoe, the wing gage 26 would permit the rounding out to be made excessively close to the shoe upper. For this purpose, the I 6 illustrated welt support 18, which is fixed to a carrier (Figs. 5 and 6) mounted to slide in a recess between the above-mentioned slide 38 and flanges 142 integral with the plate 20, is locked relatively'to the tool head in the position .it occupies when the rounding cut passes into the inner shank until the rounding cut emerges therefrom. The mechanism for thus controlling the welt support 18 will be only briefly referred to below, since this mechanism, as well as its relation to the wing gage 26, is fully disclosed and claimed in a copending application for United States Letters Patent of G. W. Cleversey et al., Serial No. 536,474, filed September 26, 1955.

The welt support 18 is normally biased into engagement with the side of the shoe upper contiguous to the upper surface of the welt by a compression spring 152 (Fig. 3) which bears against a lug 144 fixed to the left hand side of the carrier 140. Thus, the welt support is constantly positioned by engagement with the shoe as long as it is free to slide with respect to the tool head. The locking of the welt support is effected by connections comprising a pair of'brake shoes 158 (Figs. 6 and 7.) which are received in slots in the flanges 142 and are brought to bear frictionally against the carrier 140 when a cam 1'54, fixed to the above-mentioned cam 128, engages a roll 156. This roll is associated with a bar 164 which is mounted to slide freely between the flanges 142 and carries a sliding member 172 which is pivotally connected to the common joint of a pair of toggle links 182 which are joined to the shoes 158. A spring bearing upon the rearward end of the bar 164 biases the latter rearwardly so as to cause enough collapsing of the toggle links 182 to remove the pressure of the shoes 158 against the flanges 142 when the cam 154 leaves the roll 156. Another spring 178 compressed between the bar 164 and the member 172 causes the toggle links to be yieldingly extended and braking pressure to be exerted by the shoes 158 upon the carrier 140 when the roll 156 is engaged by the cam 154.

The use and operation of the illustrated machine will now be briefly described.

The shoe is presented to the tool head with its bottom uppermost and engaged by the bottom rest 22 which holds the upper surface of the welt of the shoe flatly against the anvil 16 and welt support 18. The tool head is bodily biased toward the shoe, as disclosed in the above-mentioned Cleversey application, constantly to maintain the wing gage 26 in contact with the shoe upper, the shoe being supported by a jack which is moved automatically so as to present the periphery of the sole progressively to the knife 10.

The rounding cut is begun near the outer breast line of the shoe and progresses forwardly thereof along the outer shank, around the forcpart, then along the inner shank, and finally around the heel part to the starting point.

At the beginning of the cut, the roll 126 engages the cam 128 at the radius A (Fig. 6), the elements 28, 30 of the gage now being partially collapsed. As the rounding cut traverses the junction of the forepart with the outer shank, the rising slope on the cam 128 between the radii A and B is presented to the roll 126, causing the gage elements 28, 30 to be moved into their fully extended relation, in which they present a concave work-engaging surface to the shoe suitable for engaging the convex contour of the forepart.

Wherever the peripheral contour of the shoe is only slightly convex, as at the outer and inner sides of the forepart, the shoe upper is engaged at spaced points by the outer ends of the lips 56, 58, the gage elements being bodily swung about the common axis of their shanks 34,

. 36 by the bearing pressure of the shoe against the gage.

However, at the toe end of the shoe, as well as at the heel end, where the curvature of the sole edge is pronounced, the shoe is engaged only by the mid portion of the gage between the inner ends of the lips 56, 58.

When the rounding cut, after having been carried around the forepart, reaches the junction of the inner forepart and shank, the falling slope on the cam 128 just beyond the radius C is presented to the roll 126, causing the gage elements 2%, simultaneously to be moved rearwardly of the tool head into their fully collapsed relation (solid lines, Fig. 6). Now, the rounding out having reached the more deeply recessed portion of the inner shank, the central convex portion of the gage, which includes the circular portions of the elements 23, 30, is presented to the shoe. As the rounding out emerges from the inside shank, the rising slope on the cam 128 terminating at radius D is presented to the roll 126, causing the gage elements 28, 30 to be moved into their extended relation in time to present a concave work-engaging surface to the shoe when its heel part is presented to the gage. The gage elements are now held in this relation, whilethe rounding out traverses the heel end of the shoe, because the portion of the cam 128 between the radii D and E which is presented to the roll 126 during this period is of constant radius. Upon the entry of the rounding cut into the outside shank the falling slope on the cam 128 beyond the radius E is presented to the roll 126 and, accordingly, the gage elements 28, 30 are collapsed rearwardly of the tool head, to a somewhat lesser extent than they were at the inside shank, but sufficiently to cause the gauge to present a concave work-engaging surface to the shoe, appropriate for engaging its slightly concave outer shank portion. Just before the machine comes to rest, at the end of each cycle, a portion of a rising slope on the cam 128, which terminates at radius B, is presented to the roll 126, causing the gage elements 28, 30 to be moved, forwardly of the tool head, part way to their fully extended relation. When the cam 128 comes to rest it is engaged by the roll 126 at radius A.

Throughout the rounding out the wing gage 26 is positioned relatively to the tool head by the cam 46 which is engaged by the roll 44 and, since the cams 46 and 128 are carried by the same cam shaft 32, the operation of the gage elements 28, 30, between their extended and collapsed relations, is always synchronized with the progress of the rounding out and the bodily movement of the gage 26 by which the graduation of the sole edge extension is effected. In order to vary the amount of the sole edge extension at all points uniformly around the shoe, the screw 54 may be adjusted to reposition the wing gage 26 toward or away from the knife 10.

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

1. 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, :1 gage for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising elements mounted for movement upon said head with respect to each other between extended and collapsed relations to vary the effective contour of the work-engaging portion of said gage, and means for moving said elements betweentheir extended and collapsed relations at predetermined stages of the rounding cut.

2. 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 mounted upon said tool head for relatively positioning the tool head and shoe, operating means for said gage for varying its position with respect to said tool head to control the sole extension formed by the rounding cut, said gage comprising elements mounted to swing upon said tool head forwardly and rearwardly thereof into advanced and retracted positions, respectively, and means for simultaneously swinging said elements from one of their positions to the other alternately in synchronism with the operation of said gage operating means.

3. 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 mounted upon said tool head for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising wings extending laterally of said tool head toward each side thereof and mounted thereon to swing forwardly and rearwardly thereof, and means for swinging said wings at one stage of the rounding out forwardly into advanced positions, said means being constructed and arranged to swing said wings rearwardly at another stage of the rounding out into retracted positions.

4. In an automatic 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 the sole, a gage for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising wings having superimposed circular portions and being mounted upon said tool head to swing about the common axis of said circular portions, and means operated at predetermined stages of the rounding cut for simultaneously swinging said wings rearwardly and forwardly of said tool head alternately.

5. In a sole rounding machine, a rounding tool, a gage having elements mounted to swing upon each other in a common plane between an extended and a collapsed relation in which the gage presents a concave and a convex work-engaging surface, respectively, to a shoe presented thereto, said elements being mounted to swing freely together in response to the bearing pressure of the work thereagainst and with respect to each other about a common axis, and means for swinging said elements about said axis with respect to each other equally in opposite directions between their extended and collapsed relations.

6. In an automatic 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 for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding out, said gage comprising elements having work-engaging surfaces arranged to engage the shoe upper along the same contour thereof, said elements being mounted for movement on said head with respect to each other to vary the workengaging contour of said gage, and means for moving said elements equally in opposite directions as the rounding cut passes each junction of the shank portion of the sole with the forepart and heel part thereof.

7. 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, said gage comprising elements having work-engaging surfaces which are continuous with each other in the same plane, said elements being mounted for movement relatively to each other between extended and collapsed relations in which the work-engaging surface of said gage lengthwise thereof is concave and convex, respectively, and means for moving said elements between their extended and collapsed relations at predetermined stages of the rounding cut.

8. In an automatic 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 for positioning the tool head with respect to the shoe, operating means for said gage for varying its position with respect to said tool head to control the sole edge extension formed by the rounding cut, said gage having elements mounted for movement with respect to each other between an extended relation in which the gage presents a concave work-engaging surface to the shoe and a collapsed relation in which the gage presents a convex work-engaging surface to the shoe, and means for moving said elements between their extended and collapsed relation in synchronism with the operation of said gage operating means.

9. 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, said gage comprising elements mounted for movement with respect to each other upon said tool head between an extended and collapsed relation in which the gage presents a concave and convex work-engaging surface, respectively, to a shoe presented thereto, said elements also being mounted to swing freely together in response to the bearing pressure of the work, and means for moving said elements with respect to each other between their extended and collapsed relations at predetermined stages of the rounding cut.

10. 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, operating means for said gage for varying its position with respect to said tool head, said gage comprising elements mounted for movement upon said head with respect to each other between extended and collapsed relations to vary the effective contour of the work-engaging portion of'said gage, and means for moving said elements equally and oppositely to each other between their extended and collapsed relations in timed relation to the operation of said gage operating means.

ll. 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 its periphery, a gage for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising elements mounted upon said tool head for movement with respect to each other forwardly and rearwardly of said head between advanced and retracted relations, respectively, to vary the effective contour of said gage, and means for holding said elements in their retracted relation while the rounding out traverses the shank portion of the shoe and for holding said elements in their advanced relation while the rounding cut traverses the forepart of the shoe.

12. In an automatic rough rounding machine in which a tool head and 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, said gage comprising elements mounted upon said head for movement with respect to each other to vary the effective contour of the work-engaging surface of said gage, and means for moving said elements equally in opposite directions at predetermined stages of the rounding cut between an extended relation and a collapsed relation, said means being constructed and arranged to hold said elements in a collapsed relation while the rounding cut traverses the shank portion of the shoe and to hold said elements in their extended relation throughout the remainder of the rounding cut.

13. In a rough rounding machine having a tool head to which a shoe is presented progressively-t transfer the point of operation of the tool head on the shoe about the 10 periphery of the sole, a gage mounted upon said tool head for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said-gage comprising wings extending laterally of said tool head toward each side thereof and mounted upon said tool head to swing bodily and also with respect to each other'about a common axis, means for positioning said wings comprising a member for moving said wings with respect to each other equally in opposite direction, said member being mounted to swing freely with said wings whereby the position of said wings relatively to each other is maintained while said wings are swung together in response to the bearing pressure of the shoe thereagainst.

14. In an automatic 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 for positioning the tool head with respect to the shoe to control the sole edgeextension formed by the rounding cut, said gage having elements mounted upon said head for engagement with a shoe presented thereto along the same contour of the shoe, said elements also being mounted for movement relatively to each other between extended and collapsed relations in which the work-engaging surface of said gage longitudinally thereof is concave and convex, respectively, and means for moving said elements from their extended relation into a collapsed relation upon each entry of the rounding out into the shank portion of the shoe.

15. In an automatic rough rounding machine having a tool head to which a shoe is presented progressively to transfer the pointof operation of the tool head on the shoe about the periphery of a sole, a gage for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, operating mean for said gage for varying its position with respect to said tool head, said gage having elements mounted for movement between an extended relation and collapsed relation, and means operated in timed relation to said gage operating means for moving said elements into their collapsed relation upon each entry of the rounding cut into the shank portion of the shoe and for moving said elements into their extended relation upon each departure of the rounding cut from the shank portion of the shoe.

16. 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, said gage comprising elements mounted upon said head to swing with respect to each other between an extended relation in which they present a concave work-engaging surface to the shoe and a collapsed relation in which they present a convex work-engaging surface to the shoe, said elements also being mounted to swing together freely in response to the bearing pressure of the shoe thereagainst, and means for holding said elements in a collapsed relation while the rounding cut traverses the shank portion of the shoe and for holding said elements in their extended relation throughout the remainder of the rounding cut.

17. In a 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, said gage comprising elements having superimposed circular portions and being mounted to swing about the common axis of said circular portions, said elements also having wings disposed one at each side of said circular portions, and means for swinging said elements equally and oppositely to each other between one relation in which said wings are behind said circular portions and a second relation in which said wings are in front of said circular portions.

18. In an automatic 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, 3. gage for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising elements each having a circular portion and continuous therewith a tangential portion, said elements being mounted upon said tool head with their circular portions in superimposed relation and to swing about a common axis which is concentric with said circular portions, the tangential portion of each of said elements having a lip disposed in overlapping relation to the circular portion of the other element, and means for swinging said elements at one stage of the rounding cut to separate said lips whereby the circular portions of said elements are exposed and present a convex work-engaging surface to the shoe, said means being constructed and arranged to swing said elements in the opposite direction at another stage of the rounding cut to bring said lips adjacent to each other whereby said circular portions of said elements are covered by said lips.

19. 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 for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising elements mounted upon said head for movement with respect to each other between an extended and a collapsed relation to vary the effective contour of the work-engaging portion of said gage, said elements also being mounted for movement together in response to the bearing pressure of the shoe, and means for moving said elements with respect to each other comprising a plunger mounted to move freely with said elementswhen they move together, and connections between said plunger and said elements for moving said elements equally in opposite directions in response to movement of said plunger lengthwise thereof.

20. 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 for relatively positioning the tool head and shoe to control the sole edge extension formed by the rounding cut, said gage comprising elements mounted to swing on said tool head and with respect to each other about a common axis, and means for moving said elements oppositely to each other to vary the contour of the work-engaging portion of said gage comprising a plunger mounted to rotate freely about its axis and to slide lengthwise thereof, and pin-and-slot connections between said plunger and elements for causing said elements to be swung in opposite directions in response to sliding movement of said plunger.

21. In a rough rounding machine, a rounding tool, a gage associated with said tool having work-engagingelements mounted to swing with respect to each other about a common axis, means for controlling said elements comprising members having coaxial tubular shanks provided with oppositely inclined slots, a plunger mounted to slide coaxially of said shanks and having a cross pin received in said slots, and means for operating said plunger to cause said elements to be swung oppositely to each other whereby the contour of the work-engaging surface of said gage is varied.

No references cited.

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