US1976763A

US1976763A - Heel slotting machine

Info

Publication number: US1976763A
Application number: US608714A
Authority: US
Inventors: Lewis J Bazzoni; Harry D Elliott
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1932-05-02
Filing date: 1932-05-02
Publication date: 1934-10-16
Anticipated expiration: 1951-10-16

Description

Oct. i6, 1934. L J. BAZZONl Er AL 1,976,763

" HEEL SLOTTING` MACHINE Filed'May 2, 1952 a sheets-sheet 1 sof zo@ Fig; 15, 60 400 Mm. I

Q mia,

t. 116, 11934; l., .1. BAZZONI 'ET AL 1,9%763 HEEL sLoTTING MACHINE n Filed May 2, 1932 8 Sheets-Sheet 2 if *q-552 2 O ,7\ L22 "a" .355 550 a .y ""57 4.2M A 54 0d. 16, 1934. L J. BAZZONl Er AL 1,976,763

HEEL SLOTTING MACHINE Filed May 2, 1952 8 Sheets-Sheet 3 n Il l l l Gt M 3934' L. J. BAzzoNl ET A1. L9759753 K HEEL SLOTTING MACHINE Filed May 2, 1952 8 Sheets-Sheet 4 I/E/v 70H5 Ocf- 16, 1934- L. J. BAZZONI Er AL. 1,976,763

HEEL SLOTTING MACHINE Filed May 2, 1952 8 Sheets-Sheet 5 Q4 \9 I; Q (D 11 x k qu N w N VN u N Oct. `16, 1934. l.. J. BAzzoNl ET Al. Y 1,976,753

HEEL SLOTTING MACHINE FiledrMay 2, 1932 8 Sheets-Sheet 6 /N l/EA/ Tm@ Oct. 16, 1934.

` Filed May 2, 1952 L. J. BAZZONI El' AL HEEL 'SLOTTING MACHINE 8 Sheets-SheetI V'7 www l Y". l

Oct. 16, 1934. l.. J. BAzzoNl y -1:r Al.

HEEL SLOTT ING MACHINE Filed May 2. 1932 e sheets-sheet 8 iatented Oct. 16, 1934 f.. 1,976,763,

UNiTEo STATES PATENT (3F-HCE HEEL SLOTTENG Lewis J. Bazzoni, Swampscott, and Harry Ih Elliott, Beverly, Mass., assignors to United Shoe Machinery Corporation, Paterson, N. J., a corporation of Nett7 Jersey Application May 2, 1932, Serial No. 608,714

117 Claims. (01.12-42) This invention relates to grooving or slotting relatively movable in a curved path extending machines and is illustrated as embodied in a maheghtWiSe and WdthWSe f a DOS-tOIled heel t0 chine for cutting in the breasts of heels grooves form in a curved surface of the heel a laterally or slots for receiving covers applied to the heels. curved cover receiving slot.

In United States Letters Patent No. 1,691,149, The illustrated machine is described with refdo granted November 13, 1928, upon application of erence to its use in forming in the breasts of Anthony Cocozella, there is disclosed a shoe hav- Louis heels cover receiving gIOOVSS 01 SlOS Such ing a Louis heel the breast of which is provided as are disclosed in the patents above-mentioned. with a wide shallow groove or slot for receiving a In order to insure accuracy in forming the slots 10A heel breast covering flap which is split from the and to reduce the cost of the slot forming operaheel portion of the sole of a shoe and is attached tion to a minimum, heels which are slotted in to the shank portion of the sole. After the heel, the illustrated machine are automatically prethe side cover of which has been applied thereto, sented to slot forming cutters, it only being necesis attached to the shoe, the flap is secured within sary for the operator to place the heels in carthe groove in the breast of the heel. rlhe upper liers which are constructed and arranged quickly 70.

end portions of grooves of the type disclosed in to locate and to clamp the heels in the machine the above-mentioned patent usually extend sub- 'and which, in accordance with a feature of this stantially from one breast edge of the heel to the invention, comprise an abutment for engaging the other so that when the covering flaps are secured attaching face of a heel, a pin extending from the in the respective grooves, the upper portions of abutment and shaped to enter a recess in the at- 2d the aps Will merge with the edges of the shank taching face, a bar for engaging the lip of the portions of the soles of the shoes. The breasts heel to orient the same about the pin, and a memof heels covered in this manner have a panel ber to clamp the oriented heel against the abuteifect which is attractive in appearance. ment.

Instead of forming in the breasts of heels wide vThe machine is provided with right and left 8dV grooves or 4slots intol which the entire iap may slotting units and With a turret upon which three be inserted and secured, it is sometimes the pracof the above-mentioned carriers are mounted at tice to form in the breast of a heel a pair of narequally spaced distances circumferentially of the row slots which are located adjacent to and eX- turret. The turret may be temporarily stopped tend along the respective breast edges of the heel. at every third of a revolution to enable the oper- S5 In covering such heels, the marginal portions of ator to remove a slotted heel from and to place the side covers thereof are inturned upon and sean unslotted heel in one of the carriers which has curedin these narrow slots and after the partially turned to and is stopped 'at a heel loading stacovered heel has been attached to the shoe, the tion. f The heels in the respective carriers are sucflap is secured to the portion of the breast face cessively rpresented to the right and to the left 90 of the heel included between the slots and the slotting units which, during a period at which marginal portions of the flap are tucked `into the the turret is at rest, operate simultaneously upon slots alongside the tucked-in marginal portions of heels in two of the carriers While the other carthe side cover. Such a construction is disclosed rier is positioned at the heel loading station.

` io in United States Letters Patent No. 1,704,204, The cutter of one of the units is constructed and 95 granted March 5, 1929, on an application filed in arranged 'IODOIHI in the breast 01 @1 heel On O Ile the naine of William H. Nutt and provides a heel, 0f the CalllerS One-half O f the Wlde Slot disthe cover of which may be quickly and effectively closed in the above-mentioned United States secured thereto, having a pleasing beaded eiect Letters Patent No. 1,691,149 or to form one of the at its breast face. narrow slots disclosed in the above-identified 100 It is an object of this invention to provide a, United States Letters Patent No. 1,704,204, demachine which will quickly and effectively form pending 1113011 the type 0f W01k fOr which the in curved surfaces of work pieces such, for inmachine S equipped and adjusted, and the other stance, as heels of shoes, cover receiving grooves unit iS Constructed and arranged t0 Complete the or slots of the types disclosed in the above-inenother half of the wide slot or to form a corre- 105 tioned patents. s sponding narrow slot in the other half of a heel With the above object in view and in accordon the other carrier. ance with a feature of the invention, the illus- In order that the turret may be intermittently trated machine is provided with slot forming stopped and securely held when heels in the carmeans and heel positioning and supporting means riers are positioned at the operating stations,

riers, are positioned at the` operating stations, A'

they should be arranged substantially in parallel relation, and that the half of the breast of each of the heels being operated upon should be located farther from the axis of r'otatiorrof4 the"` turret than the other half of the heel. `With this in view and in accordance with another feature of the invention, each ofthe carriers is mounted for rotation relatively to the turret and, as the turret is rotated, `rotates in a direction opposite to the direction of rotation ofthe turret and through the same number of degrees of rotation as the turret. f

f In order to form'the above-.described slots in the breasts of heels positioned inthe .carriers and inaccorda ce with anotheitfe'atureofl this invention, in the illustrated machinev each of the cutters is mounted for movement in a tortuous path, such movement being effected byv supporting the cutter for simultaneous-swinging movement about two axes disposed .at substantially right angles to each other.` Each rof the cutters is journaled in a cuttercarrier which is pivotally secured to a bracket comprising a projecting shaftaboutthe axis of which the bracket may be oscillated by an armor lever.- rA cam, roll mounted upon the cutter carrier and arranged for engagement witha cam controls the degree of rotation ofthe cutter carrier aboutthe bracket as the same `is oscillatedaboutthe axis of the shaft thereby to cause the cutter to move in a path similar to the heightwise curvature of the breast of the positioned heel as it moves substantially parallel to -a breast. edge ofthe heel to form in the breast a heel cover receiving slot which is substantially parallel to a breast edge oftheheel. Y

' In order effectively to move the cam roll of the cutter carrier along the sharply curved'surface of the cam through which the cutter is moved in a path following the heightwise curvature of the breast of the heel to be slotted and accordance with another feature of the invention,the illustratedmachine is provided with the above-mentioned arm for moving the cutter along the lower portion of the breast of the heeL-a lever constructed and arranged to movein a` direction disposed at a substantial angle tothe direction of movement of the arm to move the cutter along the projecting portion. of theheelbreast, and resilient means operable through the arm to inj sure that the cam roll willbe yieldingly held against the cam as the'lever moves the cutter along the projecting portion of the breast `of .the heel. The above-mentionedlever also serves to raise the cutter away from the heelafter the termination of the slotting. operation to permit the heel to be indexed with the turret.

In order to form wide slots Such as those dis-A closed in the above-.mentioned Cocozella` Patent No. 1,691,149 by the use'or" a cutter having a Short cutting edge and in accordance with a further feature of the invention, the illustrated machine is provided with means for oscillating or vibrating each of the carriers at a high rate of speed, during the travel of the cutter heightwise of the heel, widthwise of the heel to widen the slot formed in the breast of the heel. Slots formed in the breasts of different sizes ofheels as well as different portions of the same slot vary in width and therefore the illustrated machine in accordance with another feature of the invention is provided with mechanism for varying the degree of vibration of the carrier during movement 0f lthe cutter past the heel.

VIn order that each of the cutters shall form in the breasts of heels having breast edges of different radii of curvature, slots which extend substantially parallel to the breast edges of the heels, the illustrated machine, in accordance with a further feature of the invention, is provided with mechanism for varying the distance between the cutter and the axis of the shaft of the bracket which supports the cutter carrier. In the illustrated machine provision is also made to insure that the cutter follow the heightwise curvature of the breasts of heels of different sizes and styles. This is effected by providing a plurality of cams of different sizes and shapes which may be interchangeably used in the machine. f

Although the machine is described with reference to the slotting of Louis heels it will be understood that cover receiving slots maybe formed in the breasts of Cuban heels by the use of this machine. In order to equip the machine for Cu ban work the cam for causing the cutter to swing relatively to its respective carrier is replaced by a cam having a substantially plane face whichis suitably arranged to insure that there is practically nov swing of the cutter relatively to the cutter carrier during the slotting operation. Thus the illustrated machine, in accordance with another feature of the invention, is provided with a rotary cutter andv a heel clamp movable one past the other in a curved path thel curvature of'which is constrained to planes substantially parallel to the axisv about which the cuttervrotates.

' lEach of the cutter carriers may be initially adjusted lengthwise of the positioned heel upon which it is to operate in order that the cutter shaft may be disposed horizontally when the cutter is in engagement with the breast of the heel and may be initially adjusted heightwise and widthwisek of the heel to insure that the axis of rotation of the' bracket upon which the cutter carrier is mounted will pass substantially through the center of curvature of the breast edge of the Fig. 4 is another horizontal sectional View of n the illustrated machine taken along line IV--IV of Fig. 1.

Fig. 5 is a vertical sectional View taken along line V-V of Fig. 3 and illustrating the construcl. i

tion of heel carriers and turret mechanism;

Fig. 6 shows a horizontal section taken along line VI-VI of Fig. 5;

Fig. '7 is a detail view of mechanism located at the'front of the machine and actuated by a treadie to enable the operator to position heels in the heel carriers; y

Fig. 8 is a plan view illustrating portions of the cutter operating mechanism, parts of which have been broken away tol show the interior constructionoi such mechanism; v

Fig. 9 is a vertical sectional view of the machine illustrating in detail a cam and associated mechanism for operating the slot forming cutter;

Fig. 10 is a horizontal section taken along line X-X oi Fig. l;

Fig.f11 is a detail view illustrating a cutter lift cani and associated mechanism and also a cam for causing the cutter toV swing forwardly and rearwardly of the machine;

Fig. 12 shows a cam through which the turret is locked when the heels are being slotted;

Fig. 13 illustrates a cutter carrier equipped with a circular cutter or saw for forming narrow heelcover-receiving slots in the breasts of heels;

Fig. 14 is a detail view showing the relative positions of portions of the machine illustrated in Fig. 5 when the cutters are slotting the breasts of heels;

Fig. 15 shows a cam diagram illustrating the time relation of the cams which control the movement of the heel positioning and the cutter operating mechanism; f

Fig. 16 is a perspective view of a Louis heel, the breast of which has the right half of a wide heel cover receiving slot formed therein;

Fig. 17 is a View similar to that shown in Fig. 16 after the wide cover-receiving slot has been formed in the breast of the heel;

Fig. 18 is a perspective view illustrating a heel having narrow heel-cover-reoeiving slots formed at opposite sides of its breast and extending heightwise oi the heel; and

Fig. 1 9 is a perspective View of the rear bottom portion of a iinished shoe having heels such as illustrated in Fig. 18. f

The illustrated machine is constructed and arranged to form in the breasts of heels coverreceiving grooves, recesses, or slots 30 (Fig. 17)

. which extend over a substantial portion of the width of the breasts of heels 32 and are further described in the above-mentioned United States Letters Patent No. 1,691,149. The illustrated machine may also be used to form in the breasts or heels narrow heel-cover-receiving grooves, re-

cesses, or slots 34 (Fig. 18), such as are disclosed United States Letters Patent No. 1,704.204 above referred to, and in which the marginal portion of heel breast covers and the side covers oi the heels may be secured.

In order to form the heel-cover-receiving slots 39, 34 the illustrated machine is provided with three heel-positioning and clamping members or heel carriers 36 which are mounted upon a turret 36 and are automatically moved in succession in a counter-clockwise direction (Fig. 3) from a heel loading station A, where a heel is positioned in each of the carriers 56, to station B where the heel is operated upon by a cutter (Fig. 1) to iorm a part 29 (Fig. 16) of the slot 3o, or by a circular cutter or saw 42 (Fig. 13) to form the right slot 34 (Fig. 18). The heel is then indexed upon the turret 38 to station C where the slot 39 is completed by another cutter 4i) similar to the cutter r4() at station A, or where a slot S4 is formed at the left side of the breast of the heel by another circular cutter or saw 42.

It will be noted at this time that when forming the slots 30 the heelcarriers 36 are rapidly vibrated or oscillated widthwiseoi the path of movement of the

cutters

40, 42 in order to form the wide slot 30 (Fig. 17) by'cutters 40, each of which has short beveled cutting edges. When forming the slots 34 the carriers 36, and therefore the heels mounted thereon, are held stationary.

If heels are positioned upon successive carriers 36 at station A, after the turret has moved twothirds of a revolution, the opposite lateral portions of two heels are simultaneously slotted by

cutters

40 or 42 at stations B and C. The heels on their respective carriers 36, through mechamsm which will later be described, always remain parallel vto themselves as they are moved with the turret 38 upon their respective carriers 36.

The

cutters

40 and 42 are constructed and arranged to move heightwise of the heels positioned breast upwards, as shown at Fig. 5, at stations B and C in a path substantially corresponding to the heightwise curvature of the breast of the heel, and, at the same` time, swing in an arc iollowing the breast edges 44 in order that the

sides

46 and 48 of the

slots

30 and 34, respectively, may be parallel to their respective breast edges v44, except at the projecting portions 50 ofthe breasts of the heels where the

sides

46 and 48 are inclined to the adjacent breast edges 44, and terminate at the upper breast corners 52 of the heels. The cutter may, therefore, be defined as being mounted for movement in a tortuous path.y In shoes having Louis heels (Fig. 19) the breast cover 54'is split from the rear portion of the sole 56 and is left attached to the shank portion 58 of the sole. The cover 54, which is commonly referred to as a breast covering flap, is laid upon the breast ofthe heel after the same has been attached to the shoe, and, in order that the lateral edges oi the flap may form an unin terrupted continuation of the edges of the shank portion oi the shoe it is desirable that the top portions of the slots 30 and 3.4 shall extend to the upper breast corners 52 of the heel.

The illustrated l machine is automatic in its operation, the operator only being required to place heels in the positioning and clamping inembers or carriers 36 when the turret 38 is at rest, the turret rotating in a counterclockwise direction (Fig. E) and each of the heels having its top lift attaching face `74 facing the operator.

By causing the heel to remain parallel to itself as it moves from station B to station C it will be clear that the portion of the breast of the heel to be slotted is so presented to the cutters that the cutters operating in stations B and C may be conveniently mounted for swinging movement without interfering with each other.

In order tovpresent heels to the

cutters

40, 42 the illustrated machine, as above stated, is provided with the turret 38 comprising the three carriers 36 spaced at equal distances around the turret which is mounted for rotation in a horiaontal plane upon a vertically disposed shaft 62 (Fig. 5) journaled in the main frame of the inachine. Each ci the carriers 36 includes an abutment 64 with which the attaching face of the heel 32 engages, each of the heels being provided with a recess 66 to receive a pin 70 carried by the abutment 64 and a clamp 72 which is constructed and, arranged to engage the top lift attaching face '74 of the heel and may be moved away from the abutment 64 by the operator through mechanism which will later be described.

When a heel carrier 36 arrives at loading station A, the heel is properly oriented about the pin 70 by engaging the lip 68 (Figs. l' and 1S) oi fis' ` l the drum 114 and the abutment 64 is adjustably the projecting portion of the heel with a stationary plate 76 which is adjustably secured through the screw-and-slot connections 78 to the main frame. In order that the lips 68 of heels of diiferent sizes and shapes may engage the plate 76 when the recess formed in each of the heels engages the pin the recess 66 is always formed at a uniformv distance from the lip 68.

As the carriers 36 successively arrive at loading station A, the operator steps upon the treadle 80 (Fig. 2) whi-ch, through a rod 82 and an offset bell-crank-lever 84 (Fig. 7), operates a lug 86 secured to sliding rods 88 mounted in front and rear guide lugs 94, 96, respectively, thereby to move the clamp 72 secured to the sliding rods 88 against the pressure of springs 90 and away from the abutment 64 in order to remove a slotted heel from the machine and to insert an unslotted heel in the machine. Each of the springs 90 encircles its corresponding siiding rod 88 and has its rear end in engagement with a collar 92 (Fig. 5) which is forced against a shoulder of an enlarged portion 93 of the rod and engages at its forward end forward guide lugs 94. Thesprings 90, therefore,

j normally move the clamp 72 rearwardlyuntil the clamp engages the heel positioned against the abutment 64, the offset bell-crank lever 84 working against the force of the springs 90 to move the clamp 72 forwardly for removing a slotted-,heel from the carrier and to insert another heel to be slotted in the carrier. lIt will be noted that an elbow portion 98 (Fig. 7) of the bell-crank-lever 84 is pivotally mounted-upon a pin 100 extending at right angles to the direction of movement of each of the carriers 36 as it arrives at loading station A and is normally held upright for positioning behind the lug 86 for the purposeabove described. If, however, the lug 86 and theupstanding elbow portion 98 should be out of adjustment so that the lug 86, in arriving at station A, strikes the side of the elbow portion 98, such portion will pivot about the pin 100 against the pressure of a spring 102, the lower end of which is attached to the bellcrank-lever 84 and the upper portion of which is attached to a pin 104 carried by the elbow portion vided with a rearwardly extending arm 106 (Fig. 2)

the rear end of which is attached to a spring 108 to cause the arm 106 to engage a projection 110 of the main frame.

The turret 38 carries three shafts 112 (Fig. 5)

each secured to a drum 114 which is rotatably supported upon the turret 38 by roller bearings 116 and serves as a base upon which the heelpositioning and clamping members or carriers 36 are mounted. The front and the rear guide lugs 94 and 96 respectively, are formed integral with secured to the drum by a nut 118 which is in threaded relation with an extension 129 of reduced diameter at the upper end of the shaftv112.

Secured to the lower end of each of the shafts '112 is a pinion 122 which is rconstructed and arranged to mesh with a floating pinion 124 mounted for vertical movement upon a cylindrical bearing pin 126 pinned at 128 to the turret 38.

The floating pinion 124 is normally moved downball bearings 132 (Fig. 5) located on top of a fixed pinion 134 arranged to mesh with the floating pinion 124 and secured to the main frame by a screw 136. The

pinions

122, 124 and 134 are of equal diameter and have the same number of teeth, the arrangement being such that as the shaft 62 is rotated in a counter-clockwise direction, as seen from above (Fig. 3), through a certain arc, the shafts 112, as they travel with the turret through that arc, will rotate in. a clockwise direction with respect to the turret through an equal arc. It will thus be clear that heels positioned in the carriers 36 will remain in parallel relation as the turret 38 is rotated or indexed progressively to advance the heels.

The driving mechanism for the shaft 62 is so constructed and arranged, as will later be described, that it stops for a period at every third of a revolution while a slotted heel is being removed from the machine and another is inserted therein at loading station A, the two heels positioned in the other two carriers in the meanwhile being slotted at stations B and C.

Power is supplied to the machine through a driving belt 1,38 (Figs. 3 and 4) which connects a motor 140 with a counter-shaft 142 extending forwardly and rearwardly of the machine. The counter-shaft 142 carries a worm 144 constructed and arranged to mesh with a gear 146 keyed to a shaft 148 (Fig. 4) and extending transversely of the machine and provided with a disk 150 and an arm 152, tothe outer end of which is secured a roller 154 formed and arranged to engage a recessed disk 156 (Figs. 1 and 4) pinned to a shaft 158. Upon rotation of the shaft 148 a Geneva movement is imparted to the shaft 158, the periphery of the disk 150 serving progressively to engage slight concavities 160 formed in the periphery of the recessed disk 156 to lock the same in position while the heels are being slotted and until the disk 156 is again indexed by the rotation of the arm 152. Keyed to the shaft 158 isa bevel gear 162 which meshes with a bevel gear 164 secured to the bottom of the vertical drive shaft 62, the ratio of the

gears

162 and 164 being 2:1 in order that, as the slotted disk 156 is indexed one-sixth of a revolution by the arm 152, the turret 38 will move through one-third of a revolution and come to a stop until the arm 152 again moves around and indexes the slotted disk 156.

When the carriers 86 arrive at stations A, B and C, respectively, it is desired that the turret 38 be clamped against rotative movement, since even a slight displacement thereof would result in an improperly positioned slot in the breast of the heel. Accordingly, when the heels positioned in the carriers 36 are properly located a sliding bracket 166 (Figs. 2 and 5) having at its upper portion a tapered opening 168, will engage, depending upon the position of the turret 38, one of three correspondingly shaped plungers 17() which are carried by the turret 38 in vertically extending bores 172 and are yieldably slidable therein. Each of the plungers 179 has an enlarged head 174 and an elongated shank 176, the upper portion of which is threaded to receive a plungerretaining collar 173. Surrounding the shank 176 of each of the plungers 170 is a heavy spring 180, one end of which engages the head 174 of the plunger and the other end of which engages a shoulder of the turret 38, the arrangement being such that the plunger 170 is urged downwardly by the spring 180 until the collar 178 engages the upper surface of the turret. The

" an arm 182 formed integral with the pinion 122 plunger 170 is, therefore, slidingly carried by the turret, the projection of the plunger 170 beyond the turret being dependent upon the position of the collar 178 upon the plunger. "I'he lower por-V tion of the head of the plunger and the opening 168 are correspondingly tapered in order to facilitate the proper positioning of the plunger within the opening and to insure that ifthe plunger by mistake should extend slightly into the opening 168 as the turret 38 is rotated, the plung-r er will be forced upwardly againstv the pressure of the spring 180 and will not cause injury to'n portions of the machine. The tapered construction of the opening 168 and the plunger 170 also permits the rsliding bracket 166 to force the plunger 170 upwardly during the locking of the turretA 38 `thereby to insure a tight nt of the plunger 170 in the opening 168.

Asj above explained, it has been found that .a cutter 40 having a narrow .beveledcutting edge will effectively form wide slots 30 in the breasts 0f heels when the heels are rapidly oscillated or vibrated transversely of the direction of the movement of the cutter 40 as it moves past the heel in a path approximating the heightwise curvature of the breast of the heel and following a breast edge of the same. Accordingly, while the cutter is moving in such path each of the drums 114, when located at stations A and B, is vibrated or oscillated about the axis oi' the shaft 112 by and carrying a depending roller 184.

Each of the rollers 184 successively engages at stations B and C respectively swinging cams 186 (Figs. 2 and 3) secured to a shaft 188 positioned in a transversely extending boss 190 (Fig. 2) of the sliding bracket 166. To operate the swinging cams 186 the machine is provided with an arm 192 (Fig. 1) pinned to a shaft 194mounted in the main frame and carrying a transversely extending pin 196 for supporting a block 197 which fits into a vertically extending guideway 198 of a depending flange 260 of the right hand swinging cam 186. To the shaft 194 is keyed an upstanding arm 202 (Fig. 2) the upper end of which carries a pin 204 of a suitable size to receive a hub portion of a link 206, the opposite end of which is connected to a stud 208 carried by a slide 210 which is adjustable along a guideway 212 of an actuating lever 214 pivotally mounted in the main frame upon a shaft 216.

In order to oscillate the shaft 216 and thereby the lever 214 an arm 218 is secured to the yshaft 216 and is linked to a connecting rod 220, the lower end of which is mounted upon. a crank 222 (Figs. 2 and 4) carried by a .shaft 224 which is rotatably supported in the main frame and towhich is keyed a bevel gear 226 which meshes with another gearv 228 keyed to the countershaft 142.

When the axis of the stud 208 carried by the slide 210 is in line Ywiththe axis of the shaft 216 upon which rthe lever 214 is mounted, each of the swinging cams 186 will remain stationary as the lever 214 isoscillated. It .will be noted, however, that as the slide 210 is raised along the guideway 212 the angle of oscillation of the arm 202, and therefore of the cam 186, will increase.

In forming slots 30 in the breasts of Louis heels it is desirable that the degree of oscillatory movee ment of the carrier 36, when forming. the upper portion of the slot 30, should be greaterthan whenk the lower portion of the slot is `being formed, the difference between thedegreegof oscillation of the cutterwat the top and the lower portions of the heelbeing greatest when operating upon a full Louis heel, the width of which tapersto a considerable extent from the top to the bottom of .the heel. '.To vary the swinging movement of the cam 186 during each slot-forming operation, the slide 210 is connected through a link 230 to! an -arrn 232 pivoted at 234 to the main frame and pivotally connected through a link 236 Lto a cam follower 288 fulcrurned on ay shaft` 240 supported by the main frame. The cam follower 288 is urged against a swing-varying cam 242 bya spring`244, one end of which engages the rear end of the carnfollower 238, and. the other end of which is'attached to the main frame.' As the cam follower 238 rides from the lower part 246 of the .swing-varying cam 242 and up 'the shoulder 248, the carrier 36 will begin to oscillate the degreeof oscillation increasing to substantially a point 250, after which the degreeof. oscillation decreasesuntil the cam follower 288 rides down a shoulder 262 and into position upon the lower part 246 of the cam. When the cam follower 238 engages the lower partj246 of ythe swingvarying cam 242, as illustrated in Fig. 2, the cani is in neutral position and remainsstationary throughout the continuous rockingl movement of the lever 214. It will be understood, that the shape of the cam may be varied in accordance with the shape of the breast of the heel tovbe slotted. Y

In forming the slots 34 (Fig. 18) it is unnecessary to vibrate the heel carrier 36 as the cutter 42 moves past the Vheel and, accordingly, in order to set up the machine to form such slots the swing-varying ,cam 242 is replaced by a circular cam which has a diameter of suitable size to retain the slide 210 at its lowermost position at .all times thereby causing the swinging cam 186 to remain stationary throughout the slot-forming operation.

Upward movement of the bracketv 166 to lock the turret 38 and to raise each of thev swinging cams 186 into engagement with the rolls 184 is effected bya turret lock cam 254 (Fig. 4) which operates the bracket 166 in timed relation with the other elements through mechanism which will now be described. The bracket 166 is provided at its lower portion with a boss 256 (Fig. 2) which is pivotally connected through a link 258 to an arm 260 (Figs. 4 and 12) of a sleeve 262 carried upon the bearing shaft 240. The sleeve 262 has another arm 264 which carries a cam roll 266 constructed Iandarranged to engage a cain track 268 (Fig. 12) of the turret lock cam 254. When the cam roll 266 engages the lower portionf270 of the cani track 268 the bracket 166 islowered to permit the turret 38 tobe indexed, and when the-camroll 266 engages the upper portion 272 of the cam track 268 the turretis locked.

l Wheneach of the arms 182 (Fig. 5) is oscillated by its respective swing cam 186 to increase the width of aslot 30 formed in a heel, as above described, itrwill be noted that since the pinion 134 is fixed, it is desirable to throw the floating pinion 124 to a raised position suchas shown in Fig. 14', during theslot-forming operation. This is elected by providing the bracket 166 with a cup portion 274 which, upon upward movement of the bracketl to lock the turret 38, engages the lower surface of the floating pinion 124 and moves the sameY along the cylindrical bearing pin 126 against the pressure of the spring 131. Upon the completion ofthe slotting cut and upon downward movement of the bracket 166 the oatist ing pinion 124 is moved back to its original posi# tion under pressure of the spring 131.

Each oi the

rotary cutters

40, 42 is'secured to a shaft 276 of a motor 278 journaled in a cutter carrier 280. The cutter carrier 280 is trunnioned at 282 upon a pair of depending arms 284 which are secured to a U-shaped bracket 286 and relatively to which the cutter or 42 swings under the control of a cam roll or follower 288 (Figs.

1 and 9) carried'upon a shaft 289 and shaped and arranged to engage a cam 290 to cause the cutter to follow the heightwise curvature of the heel.l As the cutter moves as above'descrlbed it swings around anv axis 292 (Fig. 1) of a vertically disposed post or shaft 294 to cause ythe cutter to follow the curvature of the breastiedge 44 of a positioned heel.

The mechanisms for operating right and left

cutters

40 or 42 are substantially identical in construction but are reversed in arrangement in order that right and left units will form the right and the left halves of the slots 30, respectively, or the right and left slots 34,' respectively, ac-

cording to the type of work being operated upon. 25'

In the following description reference will be made to one of the cutting units only, it'being' understood, however, that for each part of one unit the other has a reversed but corresponding part.

The cam roll 288, which is mounted upon the shaft 289 journaled in the cutter carrier 280, is normally urged downwardly against the cam roll 290 by a spring pressed plunger 296 slidably mounted in a rearwardly extending boss of the cutter carrier 280 and constructed and arranged tov engage a lug 298 carried by the depending arm 284 of the U-shaped bracket 286. The U-shaped bracket `286 may be set in predetermined clamped relationship with respect to a horizontally dis# 46 posed bracket supporting bar 300 secured by a pin 302 to the upright post or shaft 294 mounted for rotation in a vertical housing 304 (Fig. 2) and having a collar 306 secured to its upper end and serving to support the cutter-carrying mechanism through a ball thrust bearing 308.

Thecutter carrier 280 may be swung around the axis 292 of the post 294 by a cutter-operating lever 31() (Fig. 2) extending rearwardly of the machine and having at its forward end a recessed portion which, with a plate 312 (Fig. 1) screwed to the lever 310, forms a socket for receivingka ballportion 314 of a stud 316 bolted to the inner end of the U-shaped bracket 286. y Y Each of the operating levers 310 is' of'telescopic i construction, the forward portion 318 (Fig. 2)

thereof being adjustable relatively to al housing portion 320 by releasing screws 322 and, after such adjustment is eiiected, tightening the same; The

, rear end of each of the levers 310 is provided with a socket 324 (Figs. 2 and 3) shaped to receive a ball 326 carried by an arm 328 secured to a sleeve 330 (Fig. 3) which is keyed to a shaft 332 journaled in the main frame. The rear end ofythe socket`324 is closed by a plate 334 screwed to the rear end of the housing portion 320, the ball 326 normally being forced against thehousing portion 320 of the lever 318 by a plunger 336 which is urged forwardly of the machine by a spring 338 housed in an extension 340 of the plate 334.

The reason for this construction will'appear presently. f To the outside end of the shaft 332 is secured an arm 342 having a lengthwise extending channel 344 andconnected through a link 346 to an arm 348 keyed to a shaft 350 which is supported by themain frame. The shaft 350 is secured at its inner end to an arm 352 (Figs. 4 and 11) which carries a roller 354 constructed and arranged to engage a closed cam track 356 of a cutterswing cam 358. Upon a complete revolution of the cam 358

the'cutter

40 or 42 through the above-described mechanism is moved rearwardly and forwardly ofthe machine in a complete cycle.

;The throw of the arm 328 may be lengthened or shortened by causing the point at which the link 346 is pivoted tothe arm 342 to be adjusted along the arm. This adjustment may be conveniently effected through the provision of a dovetail block 360 mounted in a correspondingly shaped channel 344 of the arm 342 and carrying a pin 362 to whichthelink 346 is pivotally secured. Adjustment of the block 360 along the channel, 344 is readily carried out by n rst releasing clamp screws 364 and then turning a hand wheel 866 which is rotatively secured to the arm 342 and in threaded relation with the block 360. When this adjustment has been made the clamp screws 364 are again tightened to retain the block 360 in adjusted position relatively tothe arm 342. In order to form the slot 30, the cutter 40 after moving from the top lift attaching face 74 to the attaching face of the heel has its direction reversed to cause it again to pass over the breast of the heel thereby to smooth out the slot. In forming the slots 34, however, there is no advantage gained by causing the cutter 42, after having formed the slot, to retrace its steps and, ac cordingly, the cutter 42 is moved only in one direction past the heel.

` 'Ine cam 290 (Fig. 9), which controls the swingingmovement of each of the

cutters

40, 42 about the trunnions 282, is secured to a slide 368 through a bar 370 (Fig. 10) carried by the slide 368 and having a vertically extending face constructed and arranged to engage the front face 372 of the cam 290 to aline the same properly lengthwise. The cam 290 is secured in position against the bar 37()v by a clamp 374 carried by the slide 368 and having a wedge portion 376 adapted to engage a V-shaped recess 378 in the rear ace of the cam. It will be clear that as a screw 380, through which the clamp 374 is secured to the slide 368, is tightened, the clamp will force the cam 290 against the bar 370 and retain the same in a predetermined relation therewith. Through the above mechanism the cam 290 may be readily replaced by a cam of a different shape when the operator desires to. slot heels, the breasts of which have a heightwise curvature diiferent'from that of the heels being slotted.

The slide 368 at its under side is provided with a dovetail recess 382 (Fig. 9) for receiving a correspondingly shaped projection 3840i a plate 386 supported upon a horizontally' projecting ange388 (Figs. adjustable forwardly and rearwardly of the machine alonga dovetail tongue 390 (Fig. 1) by turning a screw 392 which is rotatably mounted with respect te the aange 38s and is in threaded relation with a depending lug 394 (Fig. 10) secured to the plate 386. In order to lock the plate 386 against movement and to release the same for adjustment along the tongue 390, the plate 386, comprises a spline portion 391 which engages one side of the tongue 390 may be forced against the tongue bysa wedge arm 3917, one end of which engages a recess in the spline portion 387 and the other end or" which is shaped to engage a tapered end of a screw 399 carried by the plate 386. The cam 290 5 and 9) of the main frame and and which may thus be conveniently adjusted forwardly and rearwardly of the machine by turning the screw 392 and may be adjusted widthwise of the machine by moving the slide 368 relatively to the plate 388, after loosening lock screws 396 in threaded relation with the slide 368 and serving frictionally to bind the slide with the plate 386.

It will be noted that the steep portion 398 of the cam 290, along which the cam roll 288 moves to guide its corresponding cutter along the projecting portion of the breast of the heel positioned in the carrier 38, is inclined at a steep angle to the direction of movement of the cutter operating lever 310. Accordingly, the machine is provided with lifting levers 400 (Figs. l, 2 and 3) each carrying at its forward end a screw 402 which engages the under side of a projecting lug 494 of the cutter carrier 280 and assists the cutter operating arm 310 in moving the cam rolls 288 up the steep portion 298 of the earn 290. Each of the cutter lifting levers 400 is adjustably mounted lengthwise of itself by means of a screwand-slot connection 406 (Fig. 2) along a guideway 408 of an arm 410 secured to a shaft 412 mounted in the main frame, The shaft 412 is keyed to a rearwardly extending arm 414 (Figs. 2 and 3) the rear end of which is pivotally attached to a rod 416. In order to actuate the rod 416, the machine is provided with a cutter lifting cam 418 (Figs. 4 and 1l) which engages a cani roll 420 secured to one end of an angle arm 422 supported for oscillation upon the shaft 240. The other end of the angle arm 422 is pivotally connected to the rod 415, the cam roll 420 being held in engagement with the cutter lifting cam 418 through a spring 424 one end of which is secured to the angle arm 422 and the other end of which is secured to the main frame.

ln order to regulate the time at which the lifting lever 400 is effective, the screw 402 carried by the lever 409 may be adjuste-d relatively to the lever 400, the operation of the lever being so timed that when the cam roll 288, which is moved rearwardly of the cutter operating lever 310, reaches the curved portion 398 of the cam 290, the lifting lever 310 will raise its respective cutter carrier 280 to cause the

cutter

40 or 42 to swing upwardly about the trunnions-282 thereby to assist the cam roll 288 in climbing the curved portion 398 of the cam 290.

As already stated, it is customary to run each of the

cutters

40 and 42 back over the breast of the heel and thus to smooth out the bottom of the slot 30. Whether or not it is desirable to have each of the cutters 40 retrace its path, depends to a considerable extent upon the ratio of the rate ci vibrations of the carrier 36 during the slot forming operation to the speed of the cutter heightwise of the heel. In practice it has been found that satisfactory results have been obtained by decreasing somewhat the ratio of the rate of vibratory movement of the carrier 35 to the rate of speed of the cutter heightwise of the heel and by causing the cutter again to move heightwise of the slotted heel, but in a reverse direction back to its original starting position. Accordingly, after each of the

cutters

40, 42 has been raised above the lip '88 of the projecting portion of the heel, the lifting lever 400 is temporarily stopped'during about 28 of rotaton of the cutter lifting cam 418. The lifting lever 400 is then gradually lowered and the cam roll 288 in the meantime under the force of gravity moves down the portion 398 of the cam 290 to move the cutter forwardly of the machine and down the projecting portion 50 of the breast of the heel.

It is desirable that the cam roll 288 shall be held tightly but with a yielding pressure against the curved portion 398 of the cam 290. This is effected through the above-described connection between the cutter operating lever 310 and the arm 328, the ball 326 carried by the arm 328 during the first part of the slot forming operation being held against the forward portion of the rear socket 324 by the spring 338. As the cam roll 288 moves up the sharply curved portion 398 of the cam 290, the arm 328 travels faster than the cutter operating lever 310 which is slowed up by contact of the cam roll 288 with the sharply curved portion 398 and this causes the ball 326 to compress the spring 338 as the cutter lifting lever moves the cam roll 288 up the steep portion 298 of the cam.

As each of the cutters moves forwardly and beyond the top lift attaching face '74 of the heel the lever 400 is lifted through the above-described mechanism and raises with it one of the

cutters

40, 42 which swings about the trunnions 282 in order that the heel positioned in the following carrier 36 may be indexed into proper position upon the turret 48 preparatory to starting another slotting operation. When the turret 38 has been indexed and the heels next to be operated upon are again located at stations B and C, respectively, each of the cutter lifting levers 400 is lowered to permit the cutter which is normally urged downwardly by the spring-pressed plunger 296 to be lowered until the cam roll 288 engages the forward end portion 426 (Fig. 9) of the cam, it being noted that the cam is of considerable length in order that after the cutter has moved past the top lift attaching face rI4 of the highest type of heel, the cam roll will rest upon the end portion 426 of the cam 290 to position the cutter as the lifting lever 400 is lowered to ineective position. 'Ihe machine is thus ready to move each of the cutters 49, 42 rearwardly of the machine to start the slotting operation.

l It will be understood that the cutters may be controlled so that they move heightwise of the heel in one direction only preferably from the top lift receiving face 74 to the attaching face of the heel. Such an arrangement is especially useful in forming the narrow slots 34 by the use of the circular cutters 42. Accordingly, as the cutter 42 passes beyond the lip 68 of l the projecting portion 50 of the heel after having moved from one end of the heel to the other, the cutter lifting lever 310 is raised to move the outter above and outV of the way of the heel. When slotting heels as above described, as the cutter is moved away from the heel, the turret 38 is unlocked and is then indexed to position the next heel to .be slotted relatively to the cutter. As the turret 36 is being indexed, the cutter operating lever 310 moves the cutter 42 forwardly of the machine, and, after the heel has been indexed, the lifting lever 400 is lowered to permit the cam roll 288 to engage the portion 425 of the cam 290, thus positioning the cutter 42 just ahead of the top lift receiving face of the heel 74 and ready to move rearwardly through the above-described mechanism to form a slot 34 in the newly-presented heel.v

The abutment64 (Fig. 5) may be adjusted relatively tothe drum 114 in order that when slots 30 are being formed in the breasts of heels hav- 428 of the shaft 112 and the heel engaging face of the abutment maybe varied. It is customary to set the abutment 62 so that thedistance 430 is approximately equal to the transverse radius of 'curvature of the projecting portion of the breast of the heel, in order that as the heel is oscallated about the axis 428, the depth of material removed from different transverse portions of the breast of the heel will be substantially the same to. insure that the bottomof the slot 30 at the projecting portion 0f the breast will have approximately thesame curvature :as the corresponding original portion of the breast of the heel. When the above adjustment has been made, it will be clear that the cutter. andl its operating and guiding nstrumentalities will also have to be changed by mechanism which will presently be described. I

As above stated, when the style of the heels to be slotted is changed, it is generally desirable to change the radius of swing of the cutter about the axis 292 ofA the post 294 4as well as to replace the cam 290 by a cam having a cam roll engaging surface of a different curvature from that of the camremoved. To effect the adjustment of the cutter in relation to the axis 292, the machine is provided with a trough-shaped member 432 (Fig. 1) which is positioned in an extension of the slide 368 through the forwardly and rear;- Wardly extending dovetail end guideway connection 434, shaped to receive thevdepending stud 316'carried by the U-shaped bracket 286.k When the stud 316 is positioned .within the troughshaped member 432, screws, which are carried bythe U-shaped bracket'l286 and normally serve to clamp the bracket to the bar 300, are released and the bar 300 is adjusted along the U-shaped bracket 286 until the axis 292 of the post 294 has been properly located relatively to the cutter.

Inl order initially to locate thecutter relatively to the positioned heel after the adjustment just described has been madethe U-shaped bracket 286 and the bar 300 are adjustable as a unit widthwise, heightwise and longitudinally of the machine by mechanism which will now be described. The vertical housing 304 is provided with a laterally extending flange 438 having in its rear face a vertically disposed dovetail recess 440 (Fig: 8) constructed and arranged to engage a correspondingly shaped tongue of a vertically extending plate 444. The housing 304 may be raised or lowered by a hand screw 446 which is in threaded relation with an extension 448 (Fig. 2) of the housing 304 andhaving its lower end in engagement withrthe upper face of the. plate 444. In `order to carry out this adjustment, set screws 450 carried by the anges 438 of the housing 304 are released and the hand screw 446 is turned to raise or to'lower the cutter. After the proper adjustment has Ybeen effected, the set screws 450 are again tightened to retain these parts in adjusted position with respect Atoueach other.

ranged to receive a tongue 454 formed at the forward end of a bed plate 456. In order to effect the adjustment ,of the plate 444 along the tongue 454, the machine is provided with screws 456 which are in threaded relation with the wedge clamps 459. When the screws 458 are released, a hand screw 460 rotatably mounted on the tongue 454 and in threaded relation with a lug 462 secured rtothe plate 44 is turned until the cutter is properly positioned, after which the clamp screws 458 are tightened to maintain the plate 444 in adjusted position.

When itis desired to slot heels having the same general heightwise curvatures as heels for which the machine is adjusted and having wider breasts, the operator, after placing the trough-shaped member 432 on the slide 368, releases the screws 396 (Fig. l) and also the screws 436 and turns the hand screws 460. Accordingly, as the cutter carrier 280 moves widthwise, the cutter cam 290, which is mounted upon the slide 368, also partakes ofthe adjustment. After the proper adjustment has been effected, the screws 436 are again tightened and the trough-shaped member 432 is removed from the machine.

In order to aline the axis of rotation 292 (Fig. 1) with the center of, curvature of the side of the heel adjacent to the breast edge thereof, the plate 444 may be moved longitudinally of the machine by adjusting the bed plate 456 forwardly or rearwardly of the machine. Such adjustment is performed by releasing clamp screws 464 and by turning a hand screw 466, one end of which is rotatably mounted in the sliding bed plate 456 and vthe other end of which is in threaded relation with a lug 468 secured to the main frame. When the desired adjustment has been made, the screws 464 are again tightened to clamp these parts together. r

In order to cut the cam roll engaging surface of the cam 290 toa shape adapted to control the cutter in a path similar to that of the heightwise curvature of the breast of the heel, the cams 290 may be cut by using as a template a heel having the desired heightwise curvature. With this in View, the machine is provided with a pinion 470 (Fig. 1) which may be temporarily placed upon the rear projecting end of the cutter shaft 276 and meshes with another pinion 472 placed upon the cam shaft 289. A roller is then mounted upon the shaft 276 but is not held for -positive rotation therewith and a cutter is secured to the shaft 289 in place of al cam roll 288. As the cutter operating lever causes the cam cutter to move in a heightwise path controlled by the roll which is in engagement with the breast of the heel, the cam cutter forms in the cam block a surface corresponding in shape to the breast of such heel.

It is desirable in making adjustments on the machine to turn over the operating parts slowly. Accordingly, the machine is provided with a hand crank 474 normally urged forwardly of the machine by a spring 476 and having at its rearward end a serrated portion 473 constructed and arranged to engage a corresponding serrated portion 480 mounted upon the forward end of the counter shaft 142.

yThe operation of the machine will now be described. Assuming that the main driving motor 140 and the motors 273 which operate the

cutters

40 and 42 have been started; as one of the carriers 36 arrives and is stopped at Aposition A (Fig. 3), the operator steps onthe treadle to move the clamp v72 forwardly of the..machine and away from the abutment 64. After thel heel has been placed in the machine in a position such as illustrated in Fig. 5, the treadle is then released in order to permit the clamp 72 rmly to press the heel against the abutment 64. The turret 38, after a predetermined period, is automatically indexed through the above-described mechanism to move the heel positioned in the carrier 36 to position B. As the heel is moved with the carrier 36, it remains parallel to itself; the carriage 36, as it arrives at station B, being locked.

In the cam diagram illustrated in Fig. 15

reference numerals

482, 484, 486, and 488 graphically represent th'e displacement of the turret lock cam 254, the cutter swing cam 358, the cutter lift cam 418, and the cutter swing varying cam 242, respectively, during a complete cycle of the machine. By reference to this diagram, the timing relationship between the cams will be clear, it being understoodv that such diagram is for the purpose of illustrating one condition of operation of the machine and that the timing and the shape of the cams depends upon the type of heels being slotted and upon the type of slot to be formed.

The cams are illustrated as starting at 0 which corresponds to the time that the cutter is at its forwardmost point of travel. As the cams are rotated from 0 to 10, the cutter does not move forwardly or rearwardly of the machine and the turret lock cam 482 raises the sliding bracket 166 to lock the turret 38, the cutter lift cam 486 in the meanwhile causing each of the lifting levers 400 to be lowered thereby to permit the cutter carrier 280 also to be lowered until the cam roll 288 engages the lforward portion 426 (Fig. 9) of the cam 290. During the rst 10 of rotation of the cams, the cutter swing varying cam 242 causes the slide 210 to remain at the lower end of the guideway 212 of the actuating lever 214 to hold the swinging arms 186, which through the above-described mechanism oscillate the carriers 36, stationary.

From approximately 10 to 185 of rotation of the cams, the cutter is moved rearwardly of the machine, the heightwise pivotal movement of the same about the trunnion 282 being controlled by the cam 290, and the cutter carrier 280 being swung about the axis 292 of the post 294. During this corresponding period, the sliding bracket 166, which has been raised by the turrent lock cam 254, is held stationary and the cutterv lifting cam 418 is designed to retain the lever 400 at its lowermost inoperative position away from the cutter carrier 280. From 10 to 25, however, the carrier swing varying cam 242 rapidly raises the slide 210 of the actuating lever 214 to cause the swinging cams 186, which respectively engage the depending rollers 184, to vibrate the carriers 36 about their respective axes 428 (Fig. 5), the degree of vibration of the carriers rapidly increasing. The cutter starts to operate upon the heel when cams have been rotated through approximately 25 and at this time and until the swing varying cam has rotated to 155 the slide 210 is raised gradually to increase the degree of vibration of the carriers.

As the cutter swing cam 358 rotates from 135 to 145, it moves the arm 328 (Fig. 2) at approximately the same rate of speed as it is moved from 10 toy 135. During this period the cutter lift cam 418 causes the lever 400 to raise the cam roll 288 up the sharply curved portion 398 (Fig. 9) of the cam 290, this movement taking place as the cutter arrives approximately at a point 490 (Fig. 5) along the breastof the heel. f

Because of the steepness of the portion 398 of the cam 290, the cutter, during this period, does not move so fast as it would normally move if the arm 328 were rigidly connected to the operating lever 310. As above described, the arm 828 is permitted to yield relatively to the operating lever 310 through the provision of the spring 338 and its associated elements as shown in Fig. 2. This spring is compressed by the arm 328 as the cam roll 288 moves up the portion 398 of the cam and serves to insure that the cam roll 288 is always in engagement with the steep portion 398 as it is raised by the lifting lever 400. During this period, the turret remains locked. Upon rotation of the cutter swing cam 358 from 145 to 165 the arm 328 and the lifting lever 400 are at rest, the cam roll 288 being held by the tension of the spring 338 against the top part of the steep portion 398 of the cam 290 and the lever 400 serving to support the trimming mechanism in its raised position. The turret in the meantime remains locked, and the degree of swing of the carriers 36 which reaches a maximum at 155 starts to decrease gradually until the cam 242 has rotated through 290 which corresponds to the time when the cutter moves forwardly of the top-lift receiving face 74 of the heel.

During the rotation of the cutter swing cam 358 from 165 to 175, the cutter operating lever 310 is pulled forwardly of the machine under force of gravity by the carrier 280 and its associated parts as the lever 400 is lowered, the cam roll 288 being held tightly against the steep portion 398 of the cam by the spring 338 which is held by the ball 326 of the arm 328 until the cutter reaches the point 490 on the breast of the heel. The ball 326 carried by the arm 328 in the meanwhile has been traveling forwardly of the machine faster than the cam roll 288 and when the cutter reaches the point 290, the ball 326 engages with the forward part of the socket 324 for positively moving the cam roll 288 forwardly of the machine.

During the rotation of the cams from 175 to 305, the cutter is moved from point 490 on the breast of a heel forwardly of the top lift receiving face 74 of the heel, the turret continuing to remain locked and the cutter lift cam 418 retaining the lifting lever 400 in its lowered inoperative position. The cutter swing-varying cam 242 during its rotation from 155 to approximately 290, as above explained, gradually lowers the slide 210 in the actuating lever 214, thereby causing the degree of swing of the carriages 36 gradually to decrease and after rotating through 290, which corresponds to the time that the cutter moves olf the breast of the heel, the swing of the carriers rapidly diminishes until the cam 242 has rotated through 305.

When the cutter swing cam 358 has rotated through 305, the cutter has completed the slotting operation and has moved forwardly of the top-lift receiving face '74 of the heel and upon continued rotation of this cam to 360 no forward or rearward movement is imparted to the cutter. As the carrier swing-varying cam 242 rotates from 305 to 360 the slide 212 remains in its lowered position in order that there will be no vibration of the carrier during this period. From 305 to 315, however, the slide bracket 166 is moved downwardly until the turret 38 is free to be indexed, this cam during a period from 315 to 360 being constructed to retain the slide bracket 166 in a lowered position during which period.l theturret is indexed. In order tok move the cutter away from the turret 38 the cutter lift cam 418, as it rotates from 305 to 315, raises the cutter above the turretand during its continued rotation to 366 retains the cutter in such raised position. Y It will again be noted that as the bracket 166 is lowered, the cup portion 274 thereof permits the'oating pinion 12e to be moved to its lowered position illustrated in Fig. 14 in order that as the turret 38 is indexed, the heel in the carrier Willremain parallel to itself. While the operation of the machine has been described with reference tovone of the carriers 36, it Will be understood Vthat the machine is constructed and arranged to operate simultaneously upon-af heel positioned ineach of the carriers located at stations A and B, a side of the breast of one heel being slotted at station Aand the other side of the breast of the other heel being slotted at station B. By providing the turret with a third carriage 36, which, while the other two heels on the turret are being slotted, is positioned at loading station A, the' operator is able to remove a heel which has already been slotted in the machineY and to replace it with an unslotted heel during the slot forming operation.

It will be understood that the above-described operation has been included for the purpose of illustrating the invention, and that instead of having the cutters 4G, 42 move twice over the breast of the heel, the timing and the design of the cams may be such that -when the cutter has moved from the top-lift receiving face 74` to the attaching face of the heel, it may be lifted away from the control of the cam 290 and therefore awa-y from the heel instead of retracing its heightwise path of movement to the top-lift receiving face of the heel 74. Such an operation may be advantageously used whenforming the slots 34, since the character of the slot is not improved by moving the cutter back alongA the narrow slot34. l Moreover, by moving the cutteraway from the heel when it arrives at the lip 68 of the projecting portion of the heel, the turret 38 may then be indexed as the heel is'held inraised positionby the lever 400 and is being moved back to its starting position by the cutter operating lever 310. Y

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

1. A- slotting machine having, in combination, slot forming'means andheel positioning and supporting means relativelyfmovable in a curved path extending heightwise and widthwise ofa .positionedheelA to form in a curved surface of the heel a laterally curvedcover receiving slot.

2. In a machine 'of the class described, slot forming means and a heel support constructed and arranged for relative movement in a tortuous path to formin the curved breast of al heel upon the support a laterally curved cover receiving slot.

3. A slotting machine having, in combination, slot forming means and a heel support constructed and arranged 'for relative movement in a tortuouspath to form inthe breast of a.Louis -heel upon the support a laterally curved heel cover receiving slot which is substantially parallel to one ofthe breast edges ofthe heel.

4. A slotting machine having, in combination, `a support for a Louis heel," a slot-forming cutter, and means for moving the cutter in a. curved path following the general heightwise curvature of the breast of the'heeliand curvedwidthwise of the heel thereby to form a heel cover receiving slot in the breast of the heel.

5. A slotting machine having, in combination, a support for a Louis heel, a slot-forming cutter, and means including a cam to control the cutter in a curved path following the general heightwise curvature of the breast of a Louis heel and curved laterallyof the heel thereby to form a tortuousl heel'cover receiving slot in the breast of the heel.

6. A slotting machine having, in combination, a

support for a Louis heel, a slot forming cutter, and means for moving the cutter relatively to the support in a tortuous path thereby to form in the breast of the heel mounted upon the support a heel cover receiving slot-curved widthwise of the breast of the heel. Y Y

'7. A slotting machine having, in combination, a member to support and to position a Louis heel, and a cutter constructed and arranged for movement relatively to the member in a tortuous path following the general heightwise curvature of the heel and extending substantially parallel/to one of the breast edges of the heel.

8. A slotting machine having, in combination, a support for a heel, and a cutter mounted for bodily swinging movement about two axes disposed at substantial angles to each other and constructed and arranged to form in a curved surfacev of a heel upon the support a laterally curved heel cover receiving slot.

9. A slotting machine having, in combination, means constructed and arranged to position and to support a Louis heel, a slot-forming cutter, and means bodily to swing the cutter about two axes disposed at substantially right angles to each other thereby to form in the breast of the heel a cover receiving slot which extends heightwise of the heel and is curved laterally.

10. A slotting machine having, in combination, a support constructed and arranged to position and to clamp a heel, and a rotarycutter mounted for bodilyl swinging movement about two axes disposed at substantial angles to each other thereby to form in the breast ofthe heel on the support aheel cover receiving slot which is curved widthwise of the breast' of the heel.

`1-1. A slotting machine having, in combination, a cutter, a support for a work piece, means for causing relative progressive movement of the support andthe cutter thereby to form a slot in the workpiece, and means for causing relative reciprocation of the support and the cutter widthwise of the slot during said progressive movement thereby to increase the width of the slot.

12`. A slotting machine having, in combination, a cutter, a support constructed and arranged to position a heel and to clamp the same in position, means for causing relative progressive movement of the work support andI the cutter to form a cover receiving slot in the heel, and means for causing relative reciprocation of the work support and the cutter widthwise of the slot in the heelduring said progressive movement thereby to increase the width ofthe slot.

13. Agroove-forming machine having, in combination, a support mounted for reciprocation and constructedand arranged to position a work piece, 'a cutter mounted for movement in a predetermined path vrelatively to the support, and means simultaneously to reciprocate the support and l.

to -move the cutter past the support to form in the work piece awide groove. i

142 A slot-forming machine having, in coin- Abination, a support-mounted for reciprocation and constructed and arranged to position and to clamp a heel, a cuttermounted for movement in a predetermined path relatively to the support, and means simultaneously to reciprocate the support and to move the cutter past the support to form in the heel a Wide slot for receiving the cover Vof the heel.

l5. A groove-forming machine having, in combination, a rotary cutter mo-unted for movement in a predetermined path, a support constructed and arranged to position a Work piece and mounted for vibratory movement. transversely of said path, and means to vibrate the support and to move the cutter along said path to form in the Work piece and elongated groove the width of which is determined by the degree of vibratory movement ofA the Work support.

16. In a slotting machine, a support constructed and arranged for oscillation, a rotary cutter mounted for movement in a predetermined path relatively tothe Work support, and means to oscillate the Work support as the cutter moves in said path to form in a Work piece mounted upon the support a slot for receiving a cover applied to the work piece.

17. A slotting machine having, in combination, a supportl constructed and arranged to position a Wood heel and mounted for oscillatory movement, a cutter movable in a path corresponding substantially to the curvature of a surface of a heel, means to move the cutter in said path, and means to oscillate the support during movement of the cutter in said path in order to form upon the heel a slot to receive a heel cover.

18. A slotting machine having, in combination, a support constructed and arranged to position and to clamp a wood heel and mounted for oscillatory movement, a rotary cutter movable in a predetermined path, means to move the cutter in said path, and means to oscillate the support during movement of the cutter in said path at an angie to said path to form inthe heel mounted upon the support a slot for receiving a heel cover.

i9. Ak slotting machine having, in combination, slot forming means and heel supportingmeans relatively movable progressively in a curved path to form in a curved surface of a heel upon said support a curved heel cover receiving slot, and means for causing relative oscillation of the slot forming means and the heel supporting means in paths extending Widthwise ofsaid slot thereby to Widen the slot during said relative movement inthe curved path.

2G. A slotting machine having, in combination, slet forming means and heel supporting means relatively movable in a curved path to form in a curved surface of a heelvupon said support a curved heel cover receiving slot, said slot forming means and said heel supporting means being mounted for relative reciprocation transversely of said path to widen the slot during said relative movement in the curved path, andmeans constructed and arranged to vary the degree of reciprccation in order to change the Width of the slot.

2l. A slotting machine having-in combination, slot forming means and heel supporting means relatively movable in a curved path to form in a curved surface of a heel upon said supporting means a curved heel cover receiving slot, said slot forming means and said heel supporting being mounted for relative reciprocation transversely of said path to Widen the slot during said relative movement in the curved path, and means constructed and arranged to vary the de.- gree of reciprocationfduring saidl relativemovement in said curved path thereby to vary-the Width of different portions of the slot. 22. A slotting machine having, in combination.' slot forming means and a heel support constructed and arranged for relative movement in a tor-- tuous path to form in the breast of a Louis heel upon the support a heel cover` receiving slot, which is substantially parallel to one of the breast edges of the heel, and means to cause relative vibratory movement of the slotl forming means and said support in paths disposed widthwise of the heel thereby to Widen the slot during said relative movement along the path.

23. A slotting machine having, in combination, a support for a heel, a cutter constructed and arranged for progressive movement relativelyto the support in a tortuous path to form in the breast of a heel upon the support a heel cover receiving slot curved Widthwise, and means to vibrate the support relatively to the cutter in a path extending transversely of said paththereby to widen the slot formed in the breast of the heel by said cutter as it is moved along said path. 24. A slotting machine having, in combination, a support for a heel and a cutter construotedand arranged for movement relatively to the support in a tortuous path to form in the breast ofthe heel upon the `support a heel cover receiving slot curved transversely of the breast of the heel, said cutter and said support being mounted for relative oscillation transversely of said path to Widen the slot formed by the cutter as it moves in said path, and means constructed and arranged to vary the degree of oscillation during said relative movement in the path thereby to vary the Width of the slot along different portions thereof. ,A 25. A slotting machine having, in combination, a support for a Louis heel, a cutter constructed and arranged for progressive movement relatively to the support in a tortuous path extending generally heightvvise of the heel positioned inthe support thereby to `form in the breast of the heel a heel cover receiving slot arranged parallel to a breast edge of the heel, and means to vibrate the support relatively to the cutter Widthwise of the heel during the movement of said cutter thereby to widen the slot.

26. A slotting machine having, in combination, a support for a Louis heel, a cutter constructed and arranged for movement relativeiy to the support in a ytortuous path extending generally heightvvise of the heel positioned in the Support to form in the breast of the heel a cover receiving slot extending parallel to a breast edge o the heel, said support being mounted for oscilla.-A tion transversely of said path during movement of said cutter to widen the slot formed thereby, and means constructed and arranged tovary the degree of reciprocation of the support during movement of the cutter thereby to vary the width of the slot formed in the heel along diierent portions of the same. y 27. A slotting machine having, in combination, a support for a heel, a cutter constructed and arranged for bodily swinging movement about two axesdisposed at substantial angles to each other toeform in a curved surface of a heel upon the support a laterally curved heel cover receiving slot, and means to vibrate the support transverselyy of the path of movement of said cutter thereby to Widen the slot formed in the heel as the cutter is moved in said path. 28. A slotting machine having, in combination, a support for a heel and a cutter constructed and arranged for movement about two axes disposed at'A substantial angles to each other to form in the breast of a Louis heel upon the support a heel cover receiving slot which is curved widthwise of the breast of the heel, said support being mounted for oscillation widthwise of said path of movement to widen the slot formed by the cutter, and means constructed and arranged to vary the degree of oscillation of the support thereby to vary the width of the slot.

29. A slot forming machine having, in com'- bination, a support mounted for oscillation and constructed and arranged to position a work piece, a cutter mounted for movement ina predetermined path relatively to the support, and means simultaneously to move the cutter past the support and to oscillate the support through an arc across said path to form in the work piece a Wide s'lot. Y y

30. A slot forming machine having, in combination, a rotary cuttermounted for movement in a predetermined path, a support constructed and arranged to' position aheel and mounted for vibratory movement in an arcuate path disposed transversely of the path of movement of the cutter, and means to vibrate the support and to move-the cutter along said path to formin the heel an elongated cover receiving slot the width of which is controlled by the degree of -vibratory movement of the Work support.

31. A slotting machine having, in combination, slot forming means and heel supporting means relatively movable in a curved path to form ina curved surface of a heel upon the support a heel cover receiving slot, and means to cause relative vibratory movement of the slot-forimng means and said heel-supporting means in arcuate paths extending transversely of said first-named path thereby to widen the slot during the above said relative movement.A

32. A slotting machine having, in combination, a support for a Louis heel, a cutter-constructed a-nd arranged for movement relatively to the support in a tortuous path extending generally heightwise of the heel positioned in the support, and means to vibrate the support in a circular path having a radius of curvature equal substantially to the radius of curvature of a transverse portion of the upper projecting part of the breast of the heel during said movement of the cutter thereby to widen the slot.

33'. A slotting machine having, in combination, a support for a Louis heel, va cutter constructed and arranged for movement relatively to the support in a tortuous path extending generally heightwiseof the heel positioned in the support to form in the breast of the heel a cover receiving slot extending parallel to a breast edge of the heel, and'means to vibrate the support in -a circular path having a radius of curvature substantially equal to that of the curvature 'of a transverse portion of the upper projecting part of the breast of the heel thereby to widen the slot formed by the cutter. v

34. A slotting machine having, in combination, a support for a Louis heel, a rotary cutter constructed and arranged for movement relatively to the `support in a tortuous path extending generally heightwise of the heel positioned in the support to form in the breast of the heel acover receiving slot extending parallel to a breast A'edge of. the heel, said support being `mounted for vibratory movement in a circular path Yhaving a radius of curvature substantially equal to that of a transverse portion of the' upper projecting party of the breast 4of the" heel toy widen' the slot formed by the cutter, and means constructed and arranged to vary the degree of vibration of the support during movement of the cutter thereby to vary the width of the slot formed in the heel along different portions thereof.

35. A slotting machine having, in combination, slot forming means, and means to position a heel the breast of which has a projecting portion, said slot forming means and said heel positioning meansbeing mounted for relative movement to form in the projecting portion of the breast of the heel a heel cover receiving slot which extends heightwise of the heel and terminates at one of the upper breast corners of the heel.

36. lA grooving machine having, in combination, a rotary cutter, and means constructed and arranged to position a heel the breast of which has a projecting portion relatively to the cutter, said cutter' and said heel positioning means being mounted for relative movement to form in the projecting portion of the breast of the heel a heel cover receiving groove inclined toward one of the breast edges of the heel.

37. A heel slotting machine having, in combination, a support for a heel, a rotary cutter, said cutter being mounted for swinging movement about two axes disposed at substantially right angles to each other to form in the breast of the heel upon the support a heel cover receiving slot extending heightwise and widthwise of theheel. 38. A slotting machine having, in combination, a support for a Louis heel, a rotary cutter, said cutter being mounted for swinging movement about two axes disposed at substantially right angles to the axis of rotation of the cutter and at substantially right angles to each other, means to move the cutter about one of said axes, and a cam shaped and arranged to control the movement of the cutter about the other axis as the cutter moves about said one axis thereby to form in the breast of the heel upon the support a heel cover receiving slot extending heightwise and widthwise of the heel.

39Y A slotting machine having, in combination, a support for a heel, a rotary cutter, said cutter being mounted for swinging movement about two axes disposed 'at substantially right angles to the axis of rotation of the cutter and at substantially right angles to each other, means to move the cutter about one of said axes, a cam shaped and arranged to control the movement of the cutter about the other axis as it moves about said one axis to form in the breast of the heel upon the support a heel cover receiving slot extending heightwise and widthwise of the heel, and means to vary the distance between the cutter and said one axis to vary the lateral radius of curvature of the slot.

40; A slotting machine having, in combination, a support constructed and arranged to position a heel, a cutter mounted for swinging movement about two axes disposed at substantial angles to each other, means vto swing the cutter about one axis, and a cam to control the movement of the cutterV about theV other axis as the cutter swings about said one axis to cause the cutter to form in the heel a heel cover receiving slot;

41. A slotting machine having, in combination, a support constructed and arranged to clamp a Louis heel, a cutter mounted for swinging movement about two axes disposed at substantially rightangles to each other, means to swing the cutterabout one axis, and a cam to control the movement of the cutter about the other axis as