US2036904A - Wood heel grooving machine - Google Patents

Description

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Apwfifl 7 mw E. A. WEBSTER WOOD HEEL GROOVING MACHINE Filed Jan. 7, 1 953 5 Sheets-Sheet l Mwwm E. A. WEBSTER WOOD HEEL GROOVING MACHINE Filed Jan. '7, 1933 5 Sheets-Shet 3 E. A. WEBSTER WOOD HEEL GROOVING MACHINE Filed Jan. 7, 1933 I 98 A WM 5 Sheets-Sheet 4 WOOD HEEL GROOVING MACHINE Filed Jan. 7, 1935 5 Sheets-Sheet 5 Patented Apr. 7, 1 936 UETED STATES PATENT OFFICE WOOD HEEL GROOVHNG MACHINE Application January 7, 1933, Serial No. 650,646

30 Claims.

This invention primarily relates to that type of wood heel grooving machines, or machines for forming thebreast surface of a wood-heel, in which the lip portion of the heel; which meets the shank part of the shoe when in position thereon, is curved convexly from one side to the other, at the time the grooving operation is performed, the convexly curved surface being blended with the rest of the breast surface which is formed.

Prior to my invention this result has been accomplished in two generically different ways; 1st

by moving the heel in a curved path,with rela-' tion to a rotarycutter, as in the patent to Sanders No. 1,213,271, and 2d by operating on the heel by means of a cutter of the internal; or rosette type, as in the patent to Russ No. 1,846,615.

Trade requirements demandnumerous variations in the formation of the breast surfaces of wood heels, many, but not all of which may be secured by'varying the'contour' of the cutting edges of the cutter blades. For example, a variation'in the formation transversely of the groove, orfrom side toside of the heel, cannot be secured by a variation in the cutter blades, in fact, variations of this character cannot, so far as I am aware,'be secured with machines produced prior to my invention. Variations in the convexity of the lip may be secured, in the type first mentioned, by varying the length of the arc through which the heel holder is carried, and in the internal cutter type, by providing for a radial adjustment of the blade holding means, but both of these arrangements involve objectionable complications.

The objects of my invention are, primarily, to provide a machine for performing the above described heel-grooving operation, which is adapted for ready adjustment to secure all necessary variations of convexity of the lip, and the longitudinal inclination of the breast surface, without changing the shape of the cutter blade edges, and which in addition maybe arranged to secure any desired variation in the transverse formation of the breast surface. Also to provide a machine with which the grooving operation may be made almost wholly automatic, so that the operation may be greatly facilitated, without danger of injury to the operator.

I accomplish these objects primarily by mounting a rotary cutter, of the type commonly employed for wood heel grooving directly onthe shaft of an electric motor, and by pivotally mounting the entire motor so that it may be oscillated about an axis which is approximately perpendicular to the motor axis,'to carry the cutter back and forth in operative relation to a fixed heel holder, and

providing in connection therewith means for oscillating the motor ata desired speed, the supporting means of the motor being arranged for adjustment with relation to the heel holder and the cutter with relation to the supporting means, to vary the length of the radius of the path of movement of the cutter, and to vary the inclina- 7 tion of the plane of movement of the motor axis.

Also by providing means for bodily moving the supporting means of the motor towards or from the holder during the oscillating movement, when variations in the transverse formation of the groove are desired.

For a more complete disclosure of the invention reference is made to the following specification in connection with the accompanying drawings, in which:

Fig. l is a view in side elevation of a complete machine embodying my invention.

Fig. 2 is a plan view thereof.

Fig. 2 is a. detail view of an alternative construction for controlling the position of the motor oscillating shaft,

Fig. 3 is a view in elevation of the front end of the machine.

Fig. 4 is a detail sectional view of a portion of the blank feeding means.

Fig.6 is a detail view of the motor oscillating means.

Figs. 6 and 7 are detail views of the motor supporting and adjusting plates.

Figs. 8 and 9 are detail views of the clamping member of the blank holder, or jack.

Figs. 10 and 11 are detail views of the base member of the jack.

Fig. 12 is a detail view of the operating means of the jack clamping member.

Fig. 13 is a detail View of a heel-positioning, notch-forming means.

Fig. 14 is a detail view of the breast gage operating means.

Figs. 15, 16 and 17 are views of heel blanks illustr'ating the work performed thereon by the machine.

As shown in the drawings, a motor It is mounted on the base of the machine and is arranged to drive a counter shaft II by a belt H, and the shaft [2 is in turn arranged to drive a shaft l4 through a belt l3. Shaft I4 is provided with a worm l5, which is in mesh with a worm gear l6 mounted on a shaft H, which may be considered as the main shaft of the machine. The shaft ll has a crank arm 18 secured on one end thereof,

and arm l8 has a crank pin is on which one end of a connecting rod is mounted, the opposite end of said rod being journaled on a crank pin 21 which is secured in a crank arm 22 on a shaft 23, said crank pin being somewhat elongated to permit longitudinal adjustment of shaft 23 without disturbing the connection with connecting rod 28. Shaft 23 is journaled in bearings 24 formed on a base plate 25, which is mounted for vertical adjustment on an upright 26 on the machine base, said adjustment being effected by an adjusting screw 2? which is swiveled in a bracket 28 secured on the upright 26 and threaded in said plate 25, clamping bolts 29, which pass thru slots in the plate, being provided for holding the plate securely in adjusted position.

In this connection, also, means are provided for securing a longitudinal adjustment of shaft 23, which comprise a collar mounted on, and having a swivel connection with said shaft, said collar having an adjusting screw 3! swiveled therein, which is threaded in a boss 32 on the bearing 24. The purpose of this adjustment will be hereinafter explained, as will an alternative means shown in Fig. 2

A crank arm 36 is rigidly mounted on the front end of shaft 23 at right angles thereto, and has a supporting plate 35 formed integrally therewith and extended forwardly therefrom at right angles, and said plate 35 has a flat face 36, (see Fig. 6), on its side next shaft 23, which is disposed in a plane parallel to the axis of shaft 23. An adjusting plate 3? is mounted on said face 36 and is connected to plate 35 by a bolt 38, which is extended through a hole 22 in plate 3?, and a hole 48 in plate 35, and said plate 3? is provided with dovetail guideways II, in which the base plate 42 of an electric motor 43 is mounted, (see Figs. 5, 6 and 7), an adjusting screw M being threaded in a lug on plate 31 and engaged with base plate 42, to adjust the latter in said guideways 4|, and bolts 45 being provided in plate 3! to clamp plate 42 in the positions to which it is adjusted in said guideways. A bolt 48 is extended from plate 31, through an arc-shaped slot 8 in plate 35, having bolt 38 as its center, to clamp the plates 36, 3'! and 42 together, the above described construction permitting adjustment of motor in the plane of the face 38 and in a direction parallel to the axis of the shaft 58 of the motor 43, and also a swinging adjustment about the bolt 38 as a center. In practice, in all positions of adjustment of motor 43, its shaft 59 is held in a position in which its axis intersects the axis of shaft 23, either at right angles, or at an angle which is slightly inclined from a right angle, as indicated in Figs. 1, 2 and 5. The motor 33 is connected to a suitable electric terminal by a flexible cable 52, and a rotary heel grooving cutter 53, having suitably shaped blades, is mounted on the end of the motor shaft 59.

As thus arranged the main body of the motor is so supported that much the greater portion of the weight thereof is supported beneath the level of the axial line of shaft 23, and the shaft 50 thereof is extended above said level, so that the cutter 53 is supported at a substantial distance above said line, and oscillation of the shaft 23 will cause the cutter to be swung back and forth in a curved path about the axis of shaft 23 as a center. The crank arm 22 on shaft 28 is of considerably greater length than that of crank 53, so that, when the shaft I l, is driven by the motor m, the rotary movement thereof will be converted into an oscillatory movement of shaft thereby producing an oscillatory movement of cutter 53. The terminals of the path of movement of the cutter may be somewhat varied by varying the length of the connecting rod 20, which is provided with means for this purpose, but this adjustment having once been made will not ordinarily have to be disturbed.

It will thus be apparent, that if a heel blank is held so that its breast portion protrudes into the path of movement of the cutter, a breast surface will be formed on the blank which will have a convexly curved lip portion, as shown in Fig. 15, the center of revolution of which will be at the axis of the shaft 23.

In connection with the above described grooving means, suitable heel blank holding means are provided, which hold the blank in a fixed position with relation to the cutter as it is swung f-om right to left, as viewed in the position of Fig. 3, automatic means, hereinafter described, being provided for feeding the blank into position to be operated on, for clamping it in this position while the cutter is moved from right to left, and for unclamping it and removing it from this position before the cutter is swung back from left to right, and then for discharging the blank which has been operated on into a suitable chute at the front of the machine.

This means is operated in time with the oscillation of the motor shaft 50, and comprises the following mechanism:-

A fixed clamping member 55, or base member of the jack, which is adapted to receive the base end of the heel blank, is mounted on the frame in a horizontal position, in which it will support the blank in the correct position to be operated on by the cutter 53, as it moves from right to left, and a support 56, having a horizontal top surface, is provided directly in front of member 55, on which the operator deposits the blank at the beginning of the operation. A clamping member, in the form of a plunger 51, is mounted for vertical reciprocation in the frame, and has a lever 58 pivotally connected to the upper end thereof, said lever being mounted on a pivot 59 in the frame and having a rod 60 connected at its upper end to the opposite end thereof from the plunger, the lower end of rod 60 being engaged with one arm of a bell crank lever 6|, which is mounted on a pivot 62 and has a cam roll 63 in I the other arm thereof, arranged to engage a cam 6t fixed on the front end of shaft l1, so that, on each revolution of the latter, the plunger 57 will be moved down to clamping position and raised to an initial position, the weight of the where it is deposited by the operator, into posir tion to be clamped by the plunger 51, and operated on by the cutter, and then for removing the blank in advance of the return movement of the cutter, and depositing it in a discharge chute.

For this purpose I provide a mechanism partly shown in detail in Figs. 4.- and 12, which comprises an arm 65, mounted on a rock shaft 66, journaled in the frame and having an arm 61 which is connected to one end of a connecting rod 68, the opposite end thereof being connected to an arm 59, mounted on a rock shaft ll], journaled in the frame, said shaft having an arm ll thereon, in the end of which a cam roll 12 is mounted, said r011 being arranged to engage a cam on shaft ill, and being held in contact therewith by a spring TM, whereby the arm 65 is swung back and forth on each revolution of shaft ii. The arm 65 has a holder block 35 on its end, in which a friction pin it is'reciprocally mounted, said pin being retarded in its reciprocating movements in both directions by a friction packing it, which engages a fiat face on one side of the pin it and is adjusted by a screw 18. A finger oil is mounted on a pivot 8!, in one side of block i5, and is provided with a hook 82 at one end, the opposite end having an arm 83, the end of which is convexly curved, and which bears against one side of the pin it, the latter having a longitudinally extending recess 8 l therein into which the arm 83 will be swung by the action of a spring pressed pin 85, when the pin it is reciprocated, as hereinafter described.

A movable breast gage 8%? is provided, shown in detail in Figs. 13 and 14, which is mounted on a lever 53?, pivoted at 88 on the frame in position to raise and lower said gage at the inner end of the base member 55 of the jack. A connecting rod $9 is attached, at one end, to said lever er and the opposite end thereof is pivotally connected to an arm on a rock shaft 9i, mounted. in the frame, said shaft having an arm 92 thereon having cam roll as which is held in engagement with the periphery of a cam 5. 9 on shaft i2. By this arrangement the gage 8% is raised and lowered, in time with the other operations, on each revolution of shaft I1.

For the purpose of guiding the heel blank as it is moved from the suppor to the base member of the jack, and for positioning it laterally thereon, a T-shaped bracket is provided, the base portion 95 of which is connected to the frame by a bolt which passes through a slot Si in the frame, (see Figs. 8, 10 and if), permitting longitudinal adjustment of said base portion. As shown in 10, a flat, elongated guiding portion 98 is formed on the end of said base portion to, and extends at each side thereof from a point in proximity to the path of oscillation of the cutter 53, at right angles to said path, and forwardly at one side of the jack member 55 and the support guiding portion 93 having a vertical face next said member and support, in which a dovetail groove is formed, to receive a strip of fiber board so, which extends throughout the lengt thereof and protrudes slightly beyond the end of the portion 93 into position in which it ma be trimmed by the cutter to the shape of the groove to be formed in the blank, thereby serving to reinforce the side of the blank at which the cutter emerges, so as to prevent splintering of the wood. A spring pressed guiding finger tilt is supported at the opposite side of the member 55 from the guiding portion t8, and acts to guide the blank as it is pushed inward, and to hold it against the fiber guiding plate 98.

The whole operation of feeding the blank into position, and removing it, is as follows:

The operator places a heel blank 1: on the support 55, as shown in Fig. 1, then arm 55 is swung down and rearward and pin it engages the back side of the blank and pushes it rearward onto the base member 55. Before the blank reaches its extreme inward position, the breast gage 36 is moved up into position, so that the breast of the blank is pressed against it. At the same time the plunger 57 will be descending, and just before the head of the plunger engages the blank, a spring pressed pin till, in the head (see Fig. 9) will engage the blank, so that, just before the blank is clamped, it will be yieldingly pressed by the pin l6 against the gage 85, by the finger inf? against the vertical face formed by the fiber board plate 59% and by the spring pressed pin ibl against the base member so that the blank will be accurately positioned, and then the blank will be firmly clamp-ed against the base member by the plunger 57! in position to be operated on by the cutter. As the cutter is advanced, the breast gage is quickly moved down out of the path of the cutter, and then. the grooving operation will be performed. The downward and rearward movement of the arm continues during the grooving operation, causing the pin it to be pushed back, and the finger to be advanced, so that, by the time the cutter has been swung past the blank and the grooving operation finished, the inner inclined end of the recess 34% in the pin it will engage the arm fit of the finger 80, causing the latter to be swung towards the blank, so that it will be held in the dotted line position of Fig. l, in which position the hook 82, at the end of the finger, will swung in front of the blank, so that it is in position to engage the breast surface formed by the cutter. stant the plunger is lifted out of contact with the blank and then the arm r35 is swung back, causing the fing to pull back the blank While holding the sa t the face of the fiber plate 99. end of support and plate in position to receive the blank asit is pulled back from the jack by finger as, so that it will automatically discharged. As the arm 65 swings back to its initial position, the rear end of pin '66 is forced against a fixed stop plate which is adjustably mounted on a bracket Eii i, causing the pin to be pushed back to its initial position, as shown in Fig. 1, so that the operation above described may be repeated.

In the subsequent operation of heel turning, in which the sides of the heel are formed, it is necessary that the heel be held centrally with relation to the breast surface w hich is formed by the grooving operation, so that the center of the convexly formed lip, or the highest point therein with relation to the base surface, will be equidistant from the two sides, at the points where they meet the breast surface.

For the purposes of positively locating the blank in the heel turning machine with reference to the breast surface which is formed, as shown in Fig. 15, means are provided herein for forming a positioning groove y (see Figs. 15, 16) in the base portion of the heel blank. To this end a right angularly shaped lever M35 is mounted on a pivotal support i Flt at the front end of the machine, and one arm of said lever has a cam roll i537 therein, which is held in contact with a cam W8, on the shaft ll, by a spring lbs. The other arm of said lever has a shaft i it mounted therein, having a pulley ill on one end thereof and an electric motor H2 is mounted on the machine base and arranged to drive shaft HEB constantly by means of a belt fit. A drill fit is mounted in a chuck in the opposite end of said shaft, and a stop screw 5 i5 is arranged on lever H95, in position to engage the frame, and limit the swinging movement of the lever by the spring ass. As thus arranged, as the lever m5 is swung rearward by the At this in- A chute tea arranged at the front spring M9, the drill H4 is advanced into engagement with the underside of the blank while it is held clamped in the jack and forms the inclined groove, or notch y in the base side of the lip of the blank, as shown in Fig. 13, the cam I08 permitting the spring I09 to move the lever I05 so as to perform this operation practically at the instant the blank is clamped by the plunger 5?, and acting to withdraw the drill by the time the breast gage 86 is withdrawn to permit the grooving operation. For the purpose of permitting the drill to perform this operation while the blank is clamped in the jack at this time, the base member 55 of the jack has a notch H5 formed in the middle of its front end and on its under side (see Fig. 10), and the breast gage 86 is also provided with a notch to permit this operation to be performed before the gage is withdrawn.

The above described construction and arrangement permits various adjustments to be made so that different formations of breast surface may be secured without changing the formation of the cutting edges of the cutter blades. If it is desired to increase the convexity of the lip curvature, the shaft 23 will be raised by adjusting the bearing plate 25 upwardly, and then the base plate 42 will be correspondingly lowered on the plate 31, and if the convexity is to be decreased, the shaft 23 will be lowered and the motor adjusted upward on plate 31. An adjustment to vary the thickness of the lip which is formed on the blank may be made by adjusting the plate 32 on the plate 3?, without substantially varying the convexity, but if it is desired to correct any variation in convexity made by such an adjustment, such correction may be made by adjusting the bearing plate 25, adjustments to vary the thickness of the lip and adjustments to vary its convexity being in no way related.

A further variation of the formation of the breast surface may be made by varying the inclination of the axis of the cutter shaft to the axis of the shaft 23, which intersects it at approximately right angles. This may be done by loosening the nut on the clamping bolt 46, so that a swinging adjustment of the plate 31 may be made about the bolt 38, as a center. This adjustment principally affects the inclination of the breast surface adjacent the top lift, or tread end of the heel, with relation to the tread surface.

As, with the above described construction, it is not practical to vary the position of the base member 55 of the jack, a further adjustment, which varies the depth of the groove which is formed in the blank, may be made by adjusting the shaft 23 longitudinally by means of the adjusting screw 3|, thereby varying the position of the path ofv movement of the cutter, so that it will be carried closer to, or further away from the blank which is held on the jack.

As shown in detail in Fig. 2 means may be provided, in substitution for the adjusting screw 3i and parts engaged thereby, whereby the shaft may be moved longitudinally during the grooving operation, so that the depth of the groove which is formed will be varied transversely of the heel instead of forming it at a uniform depth, as has been done by all prior machines of this character.

When this arrangement is to be employed, the screw 3i will be removed and a collar I it, having a cam path H7 therein, will be secured on the shaft 23. A bracket H8 will be attached to the bearing plate 25, said bracket having a pin H9, extending into said cam path ill, so that, as the shaft 23 is oscillated in one direction, it may be moved longitudinally away from the blank during the first half of the movement from right to left, and towards it during the remaining portion of the movement. This longitudinal movement will be timed with respect to the period during which the cutter is actually engaged with the blank, so that the change in direction of movement will take place at the middle ofv the grooving operation. An illustration of a formation which may thus be secured is shown in Fig. 17, on which the blank x is shown as having two distinct breast faces divided by a medial line extending from the lip to the tread face. Obviously, various formations in this way may be made by varying the formation of the cam path Ill, as for example, the entire breast surface may be made transversely convex similarly to the formation of the. lip surface. Various ornamental effects may thus be produced. Obviously, also, the longitudinal adjustment of the shaft 23, which is secured by the screw 3|, might also be secured by the construction shown in Fig. 2 if the cam path was not curved, but the screw adjustment is preferably where no variation in the transverse formation is desired.

The machine organized as above described,

performs the work rapidly and satisfactorily,

without danger of injury to the operator, and is adapted to vary the formation of the heel breast in several respects, without varying the formation of the cutter blades.

I claim:

1. In a machine for grooving heel blanks, a fixed blank holder, a constantly rotating grooving cutter, and means for moving said cutter past the holder in a curved path about an axis transverse to the axis of the cutter, to perform a grooving operation on a blank held by the holder.

2. In a. machine for grooving heel blanks, a fixed blank holder, a constantly rotating grooving cutter, and means for oscillating said cutter in operative relation to the holder about an axis transverse to the axis of the cutter.

3. In a machine for grooving heel blanks, a fixed blank holder, a shaft having a rotary grooving cutter thereon, means for constantly rotating said shaft, and means for simultaneously swinging said shaft about an axis intersecting the axis of the shaft at approximately right angles, to carry the outer past the holder in operative relation therewith.

4. In a machine for grooving heel blanks, a fixed blank holder, a shaft having a rotary grooving cutter thereon, means for constantly rotating said shaft, means for simultaneously swinging said shaft about an axis intersecting the axis of the shaft, to carry the cutter past the holder in operative relation therewith, and means for varying the angular relation between the axis of the shaft and the axis about which it is swung.

5. In a machine for grooving heel blanks, a fixed blank holder, a shaft having a rotary grooving cutter thereon, means for constantly rotating said shaft, means for simultaneously swinging said shaft about an axis intersecting the axis of the shaft, to carry the cutter past the holder in operative relation therewith, and means for varying the distance between the cutter and the axis about which it is swung.

6. In a machine for grooving heel blanks, a

stationary blank holder, a motor having a shaft arranged to be constantly rotated thereby, a grooving cutter mounted on said shaft, a support o'nwhichsaid motor is mounted, and means for oscillating'said support about an axis which intersects said shaft, to carry said cutter pastsaid holder in operative relation thereto and to return it to an initial position.

7. In a machine for grooving heel blanks, a stationary blank holder, a motor having a shaft arranged to be constantly rotated thereby, a grooving cutter mounted on said shaft, a support on which said motor is mounted, and means for oscillating said support about an axis which intersects the axis of said shaft at approximately right angles, to carry the cutter past the holder in operative relation therewith.

8. In a machine for grooving heel blanks, a stationary blank holder, a motor having a shaft arranged to be constantly rotatedthereby; a grooving cutter mounted on said shaft, a support on whichsaid motor mounted, means for oscillating said support about an axis which in-' tersectsthe axis of said shaft an angle, to 'carrysaid cutter past said holder in operative relation thereto, and means to adjust said sup port relative to theaxisabout which it is oscillated to vary the curvature of the path'of movement of the cutter.

9. Ina machine for grooving heel blanks, a fixed blank holder, a shaft having a grooving cutter thereon, means for constantly rotating saidshafua support for said shaft arranged for oscillation about an axis which intersects the axis of said shaft,'means for adjusting said support transversely of its axis with relation to said hol'den'andi means for adjusting said. cutter with relation'to the axis of said supp-crate vary the curvatureof the path of movement of the cutter with relation to the holder.

10. In a machine for grooving heel blanks, a fixed blank holder, a shaft having a grooving cutter thereon, means for constantly rotating said shaft, a support for said shaft arranged for oscillation about an axis which intersects the axis of said shaft, means for oscillating said support to carry the cutter in a curved path past the holder in operative relation therewith and to return the cutter to an initial position, means for adjusting said support, to vary the position of its axis with relation to the holder, and means to adjust the cutter in the direction of its axis and with relation to the axis of said support.

11. In a machine for grooving heel blanks, a fixed blank holder, a shaft having a grooving cutter thereon, means for constantly rotating said shaft, a support for said shaft arranged for oscillation about an axis which intersects the axis of said shaft, means for oscillating said support to carry the cutter in a curved path past the holder in operative relation therewith, and means to adjust said support in the direction of its axis, to vary the transverse position of the path in which the cutter is carried with relation r to the holder.

12. In a machine for grooving heel blanks, a blank holder, a rotary grooving cutter, means for moving said cutter past the holder in a direction transversely of a blank held by the holder, to perform a grooving operation on the blank, and means for moving said holder and cutter relatively in opposite directions transversely of said direction, to vary the depth of the groove transversely of the blank as the grooving operation is performed.

13.- In a machine for grooving heel blanks, a blankholder, a rotary grooving cutter, means for moving said cutter past the holder in a predetermined-path to perform a grooving operation on a blank held in said holder, and means for simultaneously moving said holder and cutter relatively-in a direction transverse to said path, a

to Vary the depth of the groove transversely of the blank.

14. In a machine for grooving heel blanks, a blank holder, a rotary grooving cutter, means for moving said cutter past the holder in a predetermined path to perform a grooving operation on a blank held in said holder, and means for simultaneously moving said cutter relatively to said holderin a direction transverse to said path, to vary'the depth 'of the groove while being formed;

In 'a machine for grooving heel blanks, a fixed blank holder, a rotary grooving cutter, means for oscilla'tingsaid cutter back and forth past said holder in a curved path; to perform a grooving operation on a blank held in said holder, and means for moving said cutter in the direction of its axis of oscillation while it is operating on the blank, to vary the depthof the groove while being formed.

16. In a machine for grooving heel blanks, a fixed blank holder, a shaft having a grooving cutter thereon, means for con tantly rotating said shaft, a support for said shaft arranged for oscillation about an axis which intersects the axis of said shaft, means for oscillating said support to carry said cutter back and forth past the holder in operative relation therewith, and means to move said support in the direction of its axis during the operative movement of the cutter.

17.-- In'a machine for grooving heel blanks, a fixed blank holder, a constantly rotating grooving cutter, means for oscillating said cutter about a fixed axis'as it is rotated, to move the same in one direction in operative relation to the holder and to 'return it to an initial. position, means for automatically-clamping a blank in said holder in advance of the-operative movement of the cutter,

and means'i for automatically unclamping the blanktand for removing it from the holder in ad- I Vance of the return movement of the cutter. i

18. In a machine forgrooving heel blanks, a

fixed'blank holder;:a constantly rotating grooving cutter, means for oscillating said cutter about a fixed axis as it is rotated, to move the same in one'direction in operative relation to the holder and to return it to an initial position, means for automatically feeding the blank into the holder and for clamping it in position therein after the cutter has been moved past the holder during its return movement and before it has been moved into operative relation therewith during its operative movement, and means for automatically unclamping the blank and for removing it from the holder after the cutter has been moved out of operative relation with the holder and before it is moved past the holder on its return movement.

19. In a machine for grooving heel blanks a fixed blank holder, a supporting shaft and means to move the same rotatively, an arm extending from said shaft having a support thereon extending in parallelism with the shaft, a motor mounted on said support, a shaft in said motor arranged to be rotated thereby and held in a position in which its axis is intersected by the axis of said supporting shaft at an angle, and a grooving cutter on said motor shaft arranged to be carried thereby in operative relation with said holder, to perform a grooving operation on a blank held by said holder as it is moved past the sa -e by the rotative movement of said supporting shaft.

20. In a machine for grooving heel blanks, a fixed blank holder, a rotary grooving cutter, means to move the cutter past the holder to perform a grooving operation on a blank held by said holder, an auxiliary cutting device, and means to move said device in time with the movement of the cutter to form a positioning notch in the base side of the lip portion of the blank while held in said holder.

21. In a machine for grooving heel blanks, a blank holder, a rotating grooving cutter, and means for moving said cutter in a curved path transversely of its axis past the holder while held in a fixed position, to perform a grooving operation on a blank held by the holder.

22. In a machine for grooving heel blanks, a blank holder, a rotating grooving cutter and means for moving said cutter past the holder while held in a fixed position in a path extending transversely of the cutters axis and transversely of the blank held by the holder, to perform a grooving operation on the blank.

23. In a machine for grooving heel blanks, a fixed blank holder, a rotating grooving cutter, means for moving said cutter back and forth past the holder to perform a grooving operation on a blank held thereby, and means for automatically clamping the blank in the holder in advance of the operative movement of the cutter and for automatically unclamping the blank to permit its removal from the holdervv in advance of the return movement of the cutter.

24. In a machine for grooving heel blanks, a fixed blank holder, a rotating grooving cutter, means for moving said cutter back and forth past the holder to perform a grooving operation on a blank held thereby, and means for automatically feeding the blank to the holder and for clamping it therein in advance of the operative movement of the cutter and for automatically unclaniping the blank and removing it from the holder in advance of the return movement of the cutter.

25. In a machine for operating on Wood heel blanks, a fixed blank holder member, a rotating cutter, means for moving said cutter past said member, to perform a breast shaping operation on a blank held thereby, and for returning the cutter to an initial position, a breast gage, automatic means for moving said gage into operative relation with said holder member, means for clamping the blank in position thereagainst, and means for then moving the gage from its operative position in advance of the operative movement of the cutter.

26. In a machine for operating on wood heel blanks, a fixed blank holder member, a rotating cutter, means for moving said cutter past said member, to perform a breast shaping operation on a blank held thereby, and for returning the cutter to an initial position, a breast gage, automatic means for moving said gage into operative relation with said holder member, means for feeding the blank onto said member and into position against said gage, means for clamping the blank thereon as positioned, and means for then moving said gage out of operative relation with the member in advance of the operative movement of the cutter.

27. In a machine for grooving heel blanks, a blank holder, a rotating grooving cutter, means for moving the cutter and holder relatively to perform a grooving operation on the breast portion of a blank held by the holder, an auxiliary cutting device, and means for operating the same in time with said grooving operation, to form a positioning recess in the base portion of the blank.

28. In a machine for grooving heel blanks, a l

blank holder, a rotating grooving cutter, means for moving the cutter and holder relatively to form a transversely extending groove and a transversely convex lip on the breast portion of a blank held by the holder, an auxiliary cutting device, and means for moving the same in time with the operative relative movement of the cutter and holder, to form an elongated positioning recess in the base side of the lip which is centrally located with relation to its side edges.

29. In a machine for operating on heel blanks, a fixed blank holder, a rotating cutter, and means for moving the cutter past the holder to perform a breast shaping operation on a heel blank held thereby.

30. In a machine for shaping the breast surface of heel blanks, a holder arranged to engage the ends of the blank, a rotating cutter and means for moving said cutter in a path extending transversely of the cutter axis past a blank held in a fixed position by the holder from one side to the other thereof, to perform the breast shaping operation.

EDWIN A. WEBSTER.

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