US2466178A

US2466178A - Grading machine

Info

Publication number: US2466178A
Application number: US543451A
Authority: US
Inventors: Wilbur L Mackenzie
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1944-07-04
Filing date: 1944-07-04
Publication date: 1949-04-05
Anticipated expiration: 1966-04-05

Description

w. l.. MacKENzlE 2,466,178

GRADING MACHINE 9 Sheets-Sheet 1 April s, 1949.

Filed July 4Q 1944 Plil 5 1949- w. L. MacKENzlE 2,466,178

GRADING MACHINE 9 Sheets-Sheet 2 Filed July 4, 1944 CmO/QQU W. L. MacKENZIE GRADING HACHINE v '9 Sheets-Sheet 3 Filed July 4, 1944 v l. a@ .mi

April 5, 1949. w. L. MucKENzlE 2,466,178

GRADIsa ummm Filed July 4, 1944 9 Sheets-Sheet 4 .Je Y

April 5, 1949. w. MacKENzIE 2,466,178

GRADING MACHINE Filed July 4, '1944 9A Sheets-Sheet 5 W. L. MacKENZlE GRADING MACHINE April 5, 1949.

9 Sheets-Sheet 6 Filed July 4, 1944 April 5, 1949.

w. MacKENzlE GRADING MACHINE 9 Sheets-Sheet '7 Filed July 4, 1944 GRADING MACHINE 9 sheets-sheet 8 Filed July 4, 1944 226 20@ 70" im) 217 i April 5, 1949. w. L. MacKENzlE 2,466,178

GRADING MACHINE Filed July 4, 1944 9 Sheets-Sheet 9 MASTER. MEG'JT 6721?/ lgyz. E927. KM

-Patented Apr. 5, 1949 GRADING MACHINE winm- L. MacKenzie, Beverly, mignon to United Shoe Machin ery Corporation, Flemington, N. J., a corporation of New Jersey Application July 4, 1944, Serial No. 543,451

27 Claims.

as to shape but `varies systematically along one or more axes.

An object of the invention is to provide an improved grading machine in which relative movements between a model and its follower are automatically eilected and are communicated with predetermined modiilcations to a tool and a work piece being treated by the tool. To this end, and in accordance with a feature of the invention, a model carrier and a work support are concomitantly given combined movements of rotation and translation during which a follower held in engagement with the periphery of the model controls, through a pantographic mechanism, movements of the tool relatively to the work, there being grading mechanism arranged to modify the movements oi the tool independently lengthwise and widthwise of the work.

Another object of the invention is to provide an improved length-grading mechanism. To this end and in accordance with a further feature of the invention an additional lengthwise movement is superposed on the model when the length oi the work piece to be operated upon or reproduced is to be different from that of the model. The extent of the length grading is controlled by varying the extent of this additional lengthwise movement of the model carrier.

In accordance with a further feature oi the invention, means are provided for automatically adjusting the width-grading and length-grading, mechanisms in accordance with the size oi a work piece to be operated upon or in accordance with the size of a templet which may be mounted on the work support. Feelers are arranged for engagement with selected portions of the periphery of the work piece or templet to measure the length and width thereof and means operatedby these feelers adjust the length-grading and width-grading mechanisms respectively.

The above and other features of the invention, including various novel combinations or parts and details oi construction will now be described in 2 detail by reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a plan view of one form of apparatus constructed in accordance with the present invention;

Fig. 2 is a section on the line II--II of Fig. 1:

Fig. 3 is a front elevation of the machine shown in Fis. 1;

Fig. 4 is a plan view partly in section along the line IV-IV of Fig. 3;

Fig. 6 is a section on the line VI-VI of Fis. 5; A 7 is a section along the line VII--VII o! F18. l

Fig. 8 is a section along the line VIII-'VIII of Fig. 1:

Fig. 9 is a section along the line IX-IX of Fig. 10 is a left end elevation of the machine;

Fig. 11 is a plan view of a portion of the machine on a larger scale than Fig. 1, certain of the parts being removed in order more clearly to illustrate other parts? Fig. 12 is a section on the line XII-m1 oi Fig. 11;

Fig. 13 is a section along the line XIII- XIII 0f Fis. 12:

Fig. 14 is a section along of Fig. 1:

Fig. 15 is a section on the line XV-XV of Fig. 11;

Fig. 16 is a section along the line XVI-XVI of Fig. 1l;

Fig. 17 is a section along the line XVII-XVII of Fig. 1l;

the line XIV-XIV Fig. 1a is a section along the une xvm-xvm i of Fig. ll;

Figs. 19 to 21 are plan views of the model carrier and associated mechanism with parts thereof broken away and illustrating the positions of the parts at different points in the cycle of operation when the length-grading mechanism is adjusted to duplicate the exact length of the model;

Fig. 22 is a plan view of the model carrier and associated mechanism illustrating the parts adjusted for maximum down grading oi' the length of the model;

Fig. 23 is a plan view of a work piece on the the work:

of a sheet templet.v

work support showing theaction oLav cutter on Fig. 24 is a plan view of a model and a work piece reproduced with the exact length and width of the model;

Fig. 25 is'a plan view of the model and work piece, illustrating the movement of the model during the length-grading operation and showing the work piece reproduced in a shortervlength in accordance .with the extent of movement of the model: and

Figs. 26 and 27 are plan views of themodei and work piece illustrating the action of the width-grading mechanism, the parts being positioned in Fig. 26 so that no width grading takes place whereas in Fig. 27 the work piece is graded v l down in width from the model.

'by split friction pegs lli surrounded by small islands I1 to raise the work above the support i2 and give lfreedom of action by the cutter. It will be understood that other operations may be performed by providing supports for other kinds of work and other forms of tools, without departing from the invention. natives are such things as the rough-rounding of a sole,the roughing of the margin of a, sole or of the overlasted margin upon the bottom of a shoe, and the application of cement to the marginal portion of the bottom of a shoe. In the latter case, the tool would consist of an applying member which might take the form of a nozzle. The arrangement herein shown is such-that movement is imparted to both the work and the tool so that there is a relative traversing movement which carries the tool around the periphery of the work and causes the tool to cut according to a pattern graded from a model i4 in the form As herein illustrated, the work support l2 is mounted upon a shaft i (Fig. 10) rotatable within a hollow bearing which is supported in vertical position on one end of a carrier arm |8 the other end of which is pivoted on an upright post 20 secured in a frame 22. The free end of the arm i0 is turned down to rest on a wear plate I0 (Fig. 1) which supports the arm for lateral swinging movements. Another upright post 24 (Fig. 5) is supported in the frame 22 and on it there is a sleeve 20 forming a bearing for a..

large gear 28 to which there is keyed a sprocket wheel 00. I'his sprocket wheel 00 is connected by means of a chain 02 to a similar sprocket 04 attached to a large gear 00 (Figs. 1 and 4) rotatable about the post 20. Another carrier arm 30 (Figs. 4 and 5) swings on the sleeve 20 above ythe sprocket wheel 00 and has a depending end (Figs. 4 and 5) on the lower end of which thereis attached a pinion v48 meshingwith the large gear 28. similarly, the work support shaft I8 in the carrier arm i0 is provided at its lower end with a pinion 00 which meshes with the large gear 00.

It is desired to provide the model |4 and the Illustrative of these alter- 30 ematica such that the point er cntact be tween the-'tool and the work, for example, does 'not change in position overa great distance. To get this combined motion there is provided a pinion I2. (Fig. 4) which meshes with the large f gear 28 andwhich is rotatable upon a xed stud y 04 capable of oscillating about a screw 68 carried by the base of the machine.l Power to cause this motion is. supplied to the machine through a crank 08 having a worm-and-gear connection 08 (Fig. (i) to an upright shaft 10 on which there is a gear 12 meshing with the large gear 28. As a consequence, when the gear 20 is turned,

the model, and along with it the work table. are

Y turned through av half revolution'to cause the tool to treat the heel end, for example, and are lthen translated by the action of the crank stud 00 which oscillates the carriers 08 and I8 so that .the treatment is-carried along the side of the work. This is followed by another half rotation as the toe end vis treated and then by another*- oscillation as the other side of the work is treated. It will be understood that the pinion 52 is turned through two revolutions in moving the model completely around back to its starting position.

A link ||0 (Fig. 1) is provided, so that the movements of the tool I0 are governed by a model follower, in the form of a roll 14 (Fig. 5) resting against the periphery of the model |4. This roll rier arm 00 at 02 and at its other end to a linkv 3g, tool, is carried on the end of a bent lever 18.at

'upright pivot 80. The pivot 80- is carried at the outer end of an arm 82 capable of swinging about a block 89 (Figs. 1 and 3) whichis joined by a pin 0| to an arm 92 which swings about a fixed stud 04 carried by another bracket 80 (Figs. 1 and 10) extending rearwardly from the frame. on these same studs 84 andi are bell cranks 98 and |00 (Fig. 1) Joined by a rod |02, the crank 08 being connected by alink |04 to a pivot |08 substantially above' the model follower 14 and the crank |00 being connectedl by a link |06 to the ilsool |0, these links being joined by a cross rod It will be seen, therefore, that the pivotv |00 and the tool |0 are joined by a pantographic linkage so that their movements exactly .correspond. The pivot |08, however, has a variable relation to the model follower 14 as a result of grading mechanismto be described. Further-` more, to maintain a constant relative speed of movement of the follower and the model at all Sleeved times during the operation of the machine there is provision for moving the upright stud upon which the arm 'I6 carrying the follower 14 is pivoted. This stud 80 is surrounded by the forked end of a lever l I2 (Figs. 1, 4 and 22) which is pivoted to the frame on a screw pin ||4 and has a cam roll ||0 resting against the periphery of a cam I0 carried by the shaft, 'I0 and held there 76. by means of a spring |20 (Flai) attached to the 4 work I3 with a combined'motion of rotation and 75 the operation of the machine so that a prede' tex-mined portion of the periphery of the model is traversed per unit of time at all portions of the periphery of the model. It should also he noted that the follower 'id is held against the model i@ by means of a spring |26 extending between the sub-frame 22 and an arm |28 attached to the block 18 on which the follower arm 1S is mounted.

Length grading is effected by moving the model il axially, i. e., along a line joining the tip end of the toe and the tip end of the heel as it is turned. The model |4 is secured to posts |30 (Fig. 5) carried by a slide |32 (Figs. 5, 1l and 15) which is mounted in a slideway I 34 secured to the enlarged upper end 35 (Fig. 5) of the shaft 46. Attached to the slideway is a forwardly projecting arm |36 carryinga stud |31 which forms a support for a pivotally mounted block |38 (Figs. 5 and 16) forming part of a lever having a rearwardly extending arm |33 (Figs. 11 and 16) and an arm |40 provided with a curved slot |4|. Adjustable along the slot of this arm is one end of a link |42 which is connected by means of a screw |44 to the far end of the slide |32. A stop |43 is adjustably connected by a screw |45 to the arm |40 to limit the extent of movement of the link |42 away from the stud |31. Accordingly, when the lever |39, |40 is rocked the amount of movement oi.' the slide |32 depends upon the position of the link |42 with respect to the arm |40 and the slotted arm |40 is connected to the link |42 by means of a shiftable pivot pin |46 (Figs. 16 and 17). This pin has a flat enlargement |46 on its lower end the top surface of which is corrugated, as shown in Figs. 17 and 18, to correspond with corrugations |50 on the under side of the slotted arm |40. The pin 46 slides vertically in an upwardly extending guide |41 integral with the link |42 and is normally held upwardly with the enlargement |48 in engagement with the corrugations |50 'by means of a fiat spring |52 which is forked to engage the shoulder of a reduced flattened portion |54 of the pin. Disengagement of the pivot pin |46 when it is desired to change the point of connection between the slotted arm |40 and the link |42 is effected by a two-armed lever |58, |60 (Figs. 5, 11 and 16) pivoted in the end of the link |42. This l'ever has the arm |58 overlying the head of the pin |46 and a depending arm |60 (Fig. 5) which is alined with a push rod |62 carried in depending guides |64 formed on the link |42. The push rod normally bears lightly against the depending arm |60 of the lever by reason of a spring |66 which is interposed between one of the guide arms |64 and a block |68 which is secured to the rod with its upper side portion resting against the edge of the link |42. The actuation of this rod |62 for setting the position of the pivot pin |46 will be later described.

11). It will be seen, therefore, that the model i6 on the slide 32 may be moved lengthwise dur ing its movement relatively to the follower to an extent which depends upon the setting of the link |42 with respect to the slotted arm |40. With the link 42 positioned on the arm |40 so that its connection to the arm coincides with the pivot of the lever Q36, i39 and 40, no lengthwise movement of the model;y takes place as the lever is swung by the action of the cam |80, lbut if the link is adjusted along the arm |40 away from the pivot, the model moves lengthwise as it rotates. 'Ihe movement of the model lengthwise of its slideway |34 depends upon the shape of the cam |80 (Figs. 19 and 21) as the latter is rotated with the shaft 10. In Figs. 19, 20 and 21 there is no length grading because of the fact that the link |42 is positioned parallel to the slideway |34 with its connection to the arm |40 coincident with the pivot of the lever |33, |40, |4|, whereas a maximum amount of length grading is introduced with the setting shown in Fig. 22.

Provision is also made for width'grading and. to this end, the lever 16 (Fig. l1) which carries the model follower pin 14 is provided with another arm (Fig. 1) which terminates in a ring-shaped portion |32 (Figs. 5, 6 and 22) the center of which is exactly over the follower 14.

` In this ring-shaped end'portion, there is (Fig. 6)

a headed sleeve |34 serving as a bearing for a. ring-shaped upper end |36 of a U-shaped member |38 retained to turn with the sleeve by a nut |31. The member |38 is integral at its lower end with a grading lever 200 extending lengthwise of the model and pivotally attached by a screw 202 to a slide 204 (Figs. 5, 7 and 8). The slide 204 dovetails in the guideway of a bar 206 which extends lengthwise of the model and is secured to the upper face thereof so that its axis is in alinement with the axis of the model, as determined by a line interconnecting the extreme end of the toe and the extreme end of the heel, as illustrated in Fig. 11 (the bar 206 being omitted from this figure). Secured to this grading lever 200 at an intermediate point by means of a screw 208 passing through a spacing block 203 (Fig. 7) is another grading lever 2|6 the rear end of which (Fig. 1) swings on the pivot |08 (Fig. 6) which interconnects the link |64 and the cross rod ||0. Inasmuch as the movements of the tool l0 correspond exactly to the movements of this pivot |08, the widthgrading movement imparted to the pivot |08 is reflected in the action of the tool, and it will be seen, from the continued description, that the extent of this width-grading movement depends upon the position at which the far end of the upper grading lever 2|0 is connected to, in effect, the slide 204. If the point of connection is above the pivot screw 202 of the lower grading lever 200, then there will be no relative movement between the levers 200 and 2|0 and no widthgrading action. The upper lever 2|0 is, however, forked to swing about the neck 2|| (Figs. 8 and 9) of a pivot block 2| 2 the shank of which is threaded in a latch block 2 |4 adapted to be adjustably connected to the lever 2|0. The latch block 2|4 has a striker Plate 2|5 held by screws 2|1 for a purpose which will later appear. The pivot block 2|2 is elongated and slides in a groove 2|8 of a plate 2|8 which is attached to the slide 204, and this groove 2|6 is exactly above and parallel to the groove in the slideway 206. The outside faces of the forked end portion of the lever 2|0 are inclined to fit in a dovetail groove pivot pin |46 (Figs. 16 and 17).

serrations in the upper surface of the lever by a spring 228.

Under some circumstances, it may be desired to adjust the grading mechanisms for length and l for width in accordance with the dimensions of a sole-shaped templet 248 (Fig. 1), one being provided i'or each size and width. To facilitate making such adjustments in accordance with the dimensions of one of these templets, for example, the latter, is applied to the split pegs i8 on the work table l2, upon which its heel end will occupy a predetermined position regardless of size. 'Ihe position of the toe end ofthis templet is ascertained by bringing against it a pin 24| in a toe gage plate 242 (Figs. 1, 10 and 11) hinged to a` swinging arm 258. A screw 252 in this arm prevents the hinged plate from dropping below the level of the table I2. The swinging arm 258 is i attached to a cross shaft 268 which is carried by

hangers

262 and 264 at the far or rear side of the frame 22, but prior to its movement to bring the toe gage into position, a hand latch 256 (Figs. 1, 3 and 5) having a handle 258 and an upstanding end 258 (Fig. 5) is moved to hold the i model I4 in its initial position. To accomplish this, the end 258 is brought into engagement with a notch 26| (Figs. 16 and 22) in the side ot the lever arm |89.

To set the length-grading mechanism, shaft 268 is provided at its left end with an upright arm 266 having a broadened end portion 288 (Fig. 11) for contact with a block 218 adjustably clamped to a slotted arm 212 which is an extension of the link |42, with the result that the link |42 is swung about its pivotal connection with the slide |32. 'I'his movement is permitted by an ment of the link |42 by releasing the shiftable Therelease of the pin is effected by moving the rod |62 (Fig. 5) against the arm |88 of the two-armed lever |88. |58 so that the latter will depress the pin against its spring |52 (Figs. 16). To this end, the shaft 268 has yieldably connected to it by means of a .friction clutch 214 an upstnding Striker 27|- 268 and 216. vAs this happens, the frictionally connected striker 218 drops against an upright abutment 218 (Fig. 5) which insures the proper L arrangement which anticipates the actual adjustangular relation between these two, essential for the correct timing of the movement of the rod |82 to release the pin |48.

Determination of the width-grading adjust-` ment is effected by another portion of this same hand-operated apparatus which comprises a` width-measuring lever 288 (Figs. 1, 10 and 11) i is an -upstanding .pin 288 adapted to be received r in a slot 288 (Figs. 1 and 14) of an angle piece 238 carried by a flat arm 282 extending .rearwardly from a pivot block 288. This pivot block 'surrounds and is carried by-a pin 296 which is supported on the frame 22 by abent bracket 298 (Fig. 3) adjustably secured thereto (Fig.-1). A V-shaped guide member 388 (Fig. 14), having curved entrance anges 38|, is adjustably attached by means of a screw 382 (Figs. 1 and 10) to the angle iron 288 which, in effect, forms an extension of the swinging arm 282. This screw passes through a slot 383 in the overhanging top of the guide member 388 thus furnishing a setting-up adjustment. When the arm 258 on the shaft 288 is raised -to bring the toe gage pin 24| into engagement with the templet 248, it will also bring the abutment 282 and its width-measuring lever 288 up for engagement with the ball of the templet 248. As this happens, the rear end `of the lever 288 will be guidedby the V-shaped slot of the guide member 388 until its pin 286 enters the slot 288. This is followed by manual movement of the lever 288 to bring the ball gage abutment 282 into contact with the templet, which movement will be transmitted from the angle iron 288 through a; rod 384 rto a bell crank 386 piv oted on the stud 84. The left end of bell crank 388 (Figs. 1 and 3) is adapted to engage the striker plate 2|5 on the slide block 2|8, by means of which the upper grading lever 2|8 is pivotally secured to theupper guide 2|6 and which is parallel to the dovetail guide in the arm 288, to

.determine the setting of the block 2|4 in accordance with the length of `the templet 248. 'I'he tooth on the latch 226 (Fig. 8) is so shaped that the latch block may be readily moved to the left by a force exerted on the striker plate 2|5 but the block will be eiectively locked in adjusted position and can only be moved to the right upon retraction of the latch.

In the operation of the machine, it will be assumed that the work piece on the support i2 to be operated upon or reproduced is lto be smaller both in length and width 'than that of the model I4. If the bottom of a shoe, for example. is to be roughed or cemented by an appropriate tool substituted for that of the cutter which is illustrated, 'the shoe will be mounted in a suitable manner on the work support and measurements taken directly from the shoe bottom. In the illustrated embodiment of the machine, a pattern is to be cut from a sheet of material on the work support as indicated in Fig. 23 and accordingly a templet of the'desired length and width will -ilrst be mounted on the work support i2 on the split pegs I5. Before adjusting the grading mechanisms in accordance with 'the size of this tempiet they are first moved manually yinto initial positions. Thus the arm |42 is adjusted with respect -to the curved arm |48 so that its point of connection is directly above the support for the pivotally mounted block |38 (Fig. 16) whereby swinging of the lever |38, |88, |48, during the operation of the machine, will not cause any lengthwise movement of the link |42. In other words, the machine is set for the vgreatest length. The latch block 2|4 (Fig. 8) is moved to its rearmost position with respect to the lever 2|. in which position the pivot block 2|2 is spaced rearwardiy of the screw 282 or in other words in .the position of maximum width grading down from the model. With the templet positioned on the work lsupport i2, the operator swings the toe gage plate 2.42 upwardly to bring the pin 24| intol engagement with the toe end lofthe templet. During ythis movement, the striker' 218 4engages the end of the' rod' |82 (Fig. 5) thereby to operate the lever |50, |00, moving the pivot pin |46 downwardly against Ithe force of the spring |52 out of locking engagement with the teeth on the under surface of the curved -arm |40. Shortly after this, the arm 2-66 engages the block 210 thereby to move the arm 212, and with it the link |42, into a position corresponding to the length of the templet. It will be understood that thel shorter the templet the greater the distanc the forward end of the link |42 is moved along the curved arm |40. During this time the width-measuring lever 280 engages the side oi the templet and if the templet is wider than the smallest width to which the machine is capable of grading, the lever is moved in the direction of the arrow (Fig. 1) and operates -to swing the left end of the bell crank 306 forwardly to engage the striker plate 2|5 on the slide block 2|4 thus moving this forwardly to a position depending upon the width of the templet. The lever 200 is shown in its position just before it reaches its ultim-ate position opposite to the ball line of the shoe. When the gages are returned to their rearward retracted positions the striker 216 moves away from the rod |62 whereupon the spring |52 locks the length-grading link |42 in its adjusted position. The latch 226 locks the block 2 |4 in whatever position it has been moved by the bell crank 306 so that the width and` length-grading mechanisms are now properly set. The templet may now be removed from the work support |2 and a block of plywood or the like may be placed thereon and the machine -is ready to reproduce in the work piece a pattern corresponding in shape to that of the model I4 but differing as to length and width in accordance with' the size of the templet'which has been previously placed thereon.

The machine is now operated by turning the crank 68 although it will be obvious that a suitable motor may be substituted for the crank if desired. First, however, the latch 256 (Fig. 1) is moved to withdraw its upstanding end 255 (Fig. 5) from the notch 26| (Fig. 22) in the lever arm |39. As the crank 68 is turned it operates through the

pinions

12, 28, 48 (Fig. 4) to impart a turning movement to the model carrier on the shaft 46 and the shaft is simultaneously translated by reason of the connection of the carrier arm 38 in which the shaft 46 is supported to the link 60 which is oscillated through the medium of the crank pin 56. The resulting motion is i1- lustrated in Figs. 19 to 21 in which the model carrier is first rotated to carry the heel end into the position shown in Fig. 19 after which, by a combined motion of translation and rotation, it assumes the position shown in Fig. whereupon after another turning movement to carry the toe end of the model into the position shown in Fig. 21, the motion of the model is repeated until it comes to rest in the position shown in Fig. 11. During this time it will be apparent that the pinion 52 (Fig. 4) makes two complete revolutions. The connection of the work support |2 on its shaft I6 to the model carrier slideway |34 on its shaft 46, by the mechanism shown in Fig. 4, causes a similar movement to be impartedvto the work support. During the movement of the model carrier by the mechanism shown in Fig. 4, an additional lengthwise movement along a line joining the toe and heel ends of the model is imparted thereto. This movement is eifected by movement of the cam |10 (Figs. 11 and 19 to 21) operated by its connection to the gear |14 to which is imparted a rocking motion by reason of 10 its connection to the cam |80, the result being that at predetermined times in the movement oi the model carrier the lever |39, |40 is rocked about its pivot thereby causing movement of the link |42 to slide the model carrier as indicated, diagrammatically, in Fig. 2 5. The -extent of this sliding movement depends upon the position of the link |42 with respect to the lever |40, the result being to decrease the effective length of the model as the link is swung to set it farther away from the pivot of said lever.

The tool |0 and the pivot |00 (Fig. 1) which is nearly above the model follower 14, are connected by pantographic mechanism so that themovements of the pivot |00 are duplicated by the tool I0. The pivot |08 is connected to the model follower 14 through the adjustable linkage 2|0, 200 so that the movements of the pivot |08 will differ from that of the follower in accordance with the distance between the pivot 202 and 2|| (Fig. 8) which thereby governs the width grading. If these pivots are in alinement then the pivot |08 will always be in axial alinement with the follower and no width grading takes place. However, with the machine adjusted for width grading, the movement of the pivot |00 will be less than that of the tool so that the tool will grade down from the model as indicated in Fig. 27.

From the above it will be seen that without any eifort on the part of the operator in guiding the follower with respect to the model, the machine is capable of grading both as to length and width from a pattern or model and that the adjustments for width and length grading are readily made by means of feelers or gages movable into contact with the periphery of a templet or a work piece upon'which an operation is to be performed.

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

1. In combination, a model carrier, a sheet model thereon, a follower, means maintaining said follower in engagement with the periphery of the model, a work support, a tool engageable with a work piece on saidv support, means for moving said carrier and said support in unison to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, and means connecting said tool and said follower including grading mechanism for modifying the movements of the tool to effect a graded reproduction of said model.

2. In combination, a model carrier, a sheet model thereon, a follower, means maintaining said follower in engagement with the periphery of the model, a work support, a tool engageable with a work piece on said support, means for moving said carrier and said support in unison to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, means including a parallel linkage interconnecting said follower and said tool, and a width-grading mechanism forming part of said last-named means.

3. In combination, a model carrier, va sheet model thereon, a follower, means maintaining said follower in engagement with the periphery of the model, a work support, a tool engageable with a work piece on said support. means for moving said carrier and said support in unison to present successive portions of the periphery of the model to the follower and successive porll tions of the work piece to the tool, a pantographic mechanism interconnecting said follower and said tool, and means for modifying the movements of the tool to impart a length-grading m-` tion thereto.

4. In combination, a model carrier, a sheet model thereon, a follower, means maintaining said follower in engagement with the periphery of said model, means for turning the carrier to present successive portions of the periphery of themodel to said follower, a work support, a tool for operating on a work piece thereon, means for relatively moving said work support and said tool, and means connecting said tool and said follower including grading mechanism for effecting a graded reproduction of said model.

5. In combination, a model carrier, a sheet model thereon, a follower, means maintaining said follower in engagement with the periphery of said model, means for turning the carrier to' present ,successive portions of the periphery of the model to said follower, a work support, a tool for operating on a work piece thereon. means for relatively moving said work support and said tool, means including a parallel linkage mechanism connecting said tool and said follower, a width-grading mechanism forming part of said last-named means, and means for modifying thel movements of the tool to impart a length-grading motion thereto.

6. In combination, a model support, a. follower, means maintaining said follower in. engagement with the periphery of a model mounted on the support, a work support, a tool arranged to act on a work piece mounted on the support, means for moving said supports in unison. to present successive portions of the periphery of the model to the follower and successive portions of the work piece totheA tool, means connectingthe follower and the tool to causeA them to move in unison, and means for modifying the movements of one of said supports relatively to the other to cause a grading modification of the -move-` ments of the tool.

'1. In combination, a model support. a follower, means maintaining said follower in engagement with the periphery of a model mounted on the support, a work support, a tool arranged to act on a work piece mounted on the support, means for moving said supports in unison to present with the periphery of a model mounted on the support, a work support, a. tool arranged to act on a work piece mounted on the support, means for moving said supports in unison to present successive portions ofthe periphery of the model to the follower and successive portions of the work piece to the tool, means connecting the follower and the tool to cause them to move in unison, and length-grading mechanism comprising means for modifying the movements of one of said supports relatively to the other.

10. In combination, a model carrier, a follower, means maintaining said follower in engagement with the periphery of a model mounted o n the carrier, a work support, a tool arranged to act on a work piece mounted on the support, means for moving said carrier and said support in unison to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, means connecting the follower and the tool to cause kthem to move in unison including widthgrading mechanism, and means for modifying the movements of said carrier relatively to the support to effect a length-grading modification of the movements of the tool.

1l. In combination, a model carrier, a follower, means maintaining said follower in engagement with the periphery of a model mounted on the carrier, a work support, a tool arranged to act on a work piece mounted on the support, driving means for rotating and oscillating said work support and carrier in unison, and means including grading mechanism connecting said follower and said tool.

12. In combination, a. model support, a follower, means maintaining said follower in engagement with theperiphery of a model mounted on the support, a work support, a tool arranged successive portions of the periphery of the model to the follower and successive rportions of the work piece to the tool, means connecting the follower and the tool to cause them to move in unison, means for modifying the movements of one of said supports relatively to the other to cause a grading modification of the movements of the tool, and means for adjusting said lastnamed means.

8. In combination, a model carrier, a follower, means maintaining said follower in engagement with the periphery of a model mounted on .the carrier, a work support, a tool arranged to act on a work piece mounted on the support, means for moving said carrier and said support in unison to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, means connecting the follower and the tool to cause them to move in unison, and means for modifying the movements of said carrier rela` tively to s'aid support to cause a grading modiilcation of the movements of the tool.

9. In combination, a model support, a follower, means maintaining said follower in engagement to act on a work piece mounted on the work support, means for imparting rotary movement in unison to said supports, means including pantographic mechanism connecting said follower and said tool, means for imparting an oscillatory movement to one of said supports to obtain a grading action of the tool on the work, and means for adjusting the magnitude of said oscillations.

13. In combination,r a model support, a follower, means maintaining said follower in engagement with the periphery of a model mounted 'on the support, a work support, a tool arranged to act o n a work piece mounted on the work support, means for imparting a combined rotary and oscillatory movement in unison to said work supports, means including pantographic mechanism connecting said follower and said tool, and means for varying the oscillatory movement of one of said supports independently of the other to obtain a grading action of the tool on the work.

14. In combination, a model carrier, a follower, means maintaining said follower 'in engagement with the periphery of a model mounted on the carrier, a work support, a tool arranged to act on a work piece mounted on the support, means for imparting a combined rotary and oscillatory movement in unison to said work support and carrier, means including pantographlc mechanism connecting said follower and said tool, and means for imparting an additional variable oscillatory movement to said. carrier to obtain a grading action of the tool on' the work. i

15. In combination, a model support, a follower, means maintaining said follower in ensagement with the periphery of a model mounted on the support, a work support, a tool arranged amarre to act on a work piece mounted on the work support, means for imparting rotary movements in unison to said supports, means including pantographio mechanism connecting said follower and said tool and mechanism for modifying the movements of the tool to obtain a grading action along one dimension of the model, means for imparting oscillatory movements to one of said supports to obtain a grading action of the tool along another dimension of the model. and means for adjusting the magnitude of said oscillations.

16. In combination, a model carrier, a follower, means maintaining said follower in engagement with the periphery of a model mounted on the carrier, a work support, a tool arranged to act on a work piece mounted on the support, means for imparting a combined rotary and oscillatory movement in unison to said work support and said carrier, means including pantographic mechanism connecting said follower and said tool and mechanism for modifying the movements of the tool to obtain a grading action along one dimension of the model, means for additionally oscillating said carrier to obtain a grading action along another dimension of the model, and means for adjusting the magnitude of said oscillations.

17. In combination, a model carrier, a follower, means maintaining said follower in engagement with the periphery of a model mounted on the carrier, a work support, a tool arranged to act on a work piece mounted on the support, means for imparting a combined rotary and oscillatory movement in unison to said work support and said carrier, means including pantographic mechanism connecting said follower and said tool and mechanism for modifying the movements of the tool to obtain a width-grading action thereof, means for oscillating said carrier lengthwise of the model to obtain a length-grading modification of movements of the tool, and means for adjusting the magnitude of said oscillations.

18. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said support, means` for relatively moving said model carrier and said follower to present successive portions of the periphery of the model to the follower, means for imparting similar relative movements to the work support and the tool, means including pantographic mechanism connecting said follower and tool to cause them to move in unison, and a. grading mechanism interposed in said lastnamed means for modifying the movements of the tool, said grading mechanism including an adjustable linkage connected to said model and operated by the relative movement between said model and said follower.

19. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said support, means for turning said model carrier and said work support to present successive portions of the periphery of the said model to the follower and successive portions of the work piece to the tool, and means including pantographic mechanism connecting said follower and said tool to cause them to move in unison, said mechanism having a slide mounting interposed between the model carrier and the carrier-turning mechanism.

20. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said support, means for turning said model carrier and said work support to present successive portions of the periphery of the said model tothe follower and successive portions of the worlr` piece to the tool, means including pantographic mechanism connecting said follower and said tool to cause them to move in unison, a width-grading mechanism interposed in said last-named means for modifying the movements of the tool, said width-grading mechanism including an adjustable linkage connected to said model and operated by the relative movement between said model and said follower, and means for sliding the carrier lengthwise of the model carried thereby to effect a length-grading modification of the movements of the tool.

21. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said support, means for imparting a combined rotary and oscillatory movement in unison to said carrier and said work support to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, means including pantographic mechanism interconnecting the follower and the tool to cause them to move in unison, and a grading mechanism interposed in said last-named means for modifying the movements of the tool, said mechanism having a slide mounting interposed between the model carrier and the carrier-turning mechanism, and cam-operated means for sliding the carrier lengthwise of the model carried thereby to effect a length-grading modification of the movements of the tool.

22. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said support, means for imparting a combined rotative and bodily movement to said carrier and said support to cause them to move in unison to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, means including a parallel link- .age interconnecting the follower and the tool, and

width-grading mechanism comprising a link connecting said tool and a superposed point on said linkage, pivotally connected grading levers connecting said point and said follower, a slide movable axially of the model, and means for pivotally connecting the far ends of said levers to spaced points on said slide whereby the movements of the tool are modified by this width-grading mechanism.

23. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said support, means for imparting a combined rotative and bodily movement to saidv carrier and said support to cause them to move in unison to present successive portions of the periphery of the model to the follower and successive portions of the work piece to the tool, means including a parallel linkage interconnecting the follower and the tool, and width-grading mechanism comprising a link connecting said tool and a superimposed point on said linkage, pivotally connected grading levers connecting said point and said follower, a slide movable axially of the model, means for pivotaliy connecting the far ends of said levers to spaced points on said slide where` by the movements of the tool are modified by this width-grading mechanism, and means for adjustlng the relative points of connection between the far ends of the levers and said slide to modify the degree of width grading.

24. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support. a tool arranged for engagement with a work piece on said support, means for imparting a combined rotative and bodily movement to said carrier and said support to cause them to move in unison to present successive portions of the periphery of' the model to the follower and successive portiom of the work piece to the tool, means including a parallel linkage interconnecting the follower and the tool, width-grading mechanism comprising a link connecting said tool and a superposed point on said linkage, pivotally connected grading levers connecting said point and said follower, a slide movable axially of the model, and means for pivotally connecting the far ends of said levers to spaced points on said slide whereby the movements of the tool are modified by this widthgrading mechanism, and means for sliding the model carrier axially to effect a length-grading modification of the movements of the tool.

25. In combination, a model carrier, a model mounted thereon, a follower, means maintaining said follower in engagement with the periphery of said model, a work support, a tool arranged for engagement with a work piece on said sup-3 port, means for imparting a combined rotative` and bodily movement to said carrier and said support to cause them to move in unison to present successive portions of the periphery oi the model to the follower and successive portions of the work piece tothe tool, means including a parallel linkage interconnecting the follower and the tool, width-grading mechanism comprising il.` link connecting said tool and a supelPOSed point slide movable axially of the model, and means for pivotally connecting the far ends of said levers to spaced points on said slide whereby the movements of the tool are modified by this widthgrading mechanism. means for sliding the model carrier axially to eifect a length-grading modification of the movements of the tool, and means for adjusting the points of connection between the far ends of the levers on the slide and for adjusting the magnitude of the axial sliding movement of the carrier thereby to eilect variations in the degree of width grading and of length 2s. ni combination, a model carrier, a model thereon, a follower, means maintaining said fol,

lower in engagement with the periphery of a model on the carrier, a work support, a tool arranged to act on a work piece on said support,

means for relatively moving said carrier and saidby movement into engagement with the periphery of a member on the work support for adjusting the grading mechanism in accordance with the size of said member.

27. In combination, a model carrier, a model thereon, a follower, means maintaining said follower in engagement with the v periphery of a model on the carrier, a work support, a tool arranged to act on a work piece on said support. means for relatively moving said carrier and said follower to present successive portions of the periphery of the model to the follower, means for similar relative movement to said work support and tool, width-grading mechanism Vhetween said follower and said tool, means for oscillating the model carrier to impart a lengthmodification of the movements of the tool, and means engageable lwith spaced-points on the periphery of a member on the work support for adjusting said width-grading mechanism. and the amplitude of the oscillations of the model carrier in accordance with the width and length of said member.

WILBUR L. Hmmm.

REFERENCES CITED The following references are of record in the file of this patent: l