US1305217A - jerram and f - Google Patents

Description

A. E. JERRAM AND F. B. KEALL.

LASTING MACHINE.

APPLICATION FILED JULY 19. I916.

Patented May 2.7 1919.

4 SHEETS-SHEET 2.

ms PEYCRS m, rumour/4a,. WASHIHOYON n c A. E. JERRAM'AND F. B. KEALL.

LASTING MACHINE.

APPLICATION FILED JULY 19, l lfi. 1,305,217, Patented May 27,1919.

4 SHEETSSHEET 3.

A. 'E. JEBRAM AND F. B. KEALL.

LASTING MACHINE.

APPLICATION FILED JULY. 19. 1916.

4 SHEETS-SHEETA.

Patented. May 27,1919,

. tension.

UNITED STATES PATENT OFFICE.

ARTHUR ERNEST JERRAM AND FRANK BYCROET KEALL, OF LEICESTER, ENGLAND,

ASSIGNORS, BY MESNE ASSIGNMENTS, TO UNITED SHOE MACHINERY CORPORATION,

0F PATERSON, NEW JERSEY, A CORPORATION 0J5v NEW JERSEY.

LASTING-MACHINE.

Specification of Letters Patent.

Patented May 27, 1919.

Application filed ul y 19, 1916. Serial No. 110,097.,

To all whom it may concern:

Be it known that we, ARTHUR ERNEST JERRAM and FRANK BYCROFT KEALL, subjects of the King of England, residing at .Leicester, Leicestershire,England, have invented certain Improvements in Lasting- Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention has for its object to deal with a condition existing in lasting machines that employ grippers to stretch an upper and wipers or the like to lay the flange of the upper into lasted relation to the innersole. Eflicient operation requires that the wiper take from the gripper the control of the stretched portion of the stock without loss of the tension which the gripper has applied. Under working conditions the flange of the upper is, and for economical reasons should always be, narrow and, furthermore, the gripper does not always seize it at the same distance from the edge of the upper; also the stock of one upper will stretch more than that of another. The practical result is therefore that the gripper occupies variable positions at the end of the stretching operation and it has heretofore been impracticable in a commercial 'mach'ine to cause the wiper to follow the gripper closely enough to insure against more or less loss of One chief purpose'of this invention is so to relate the gripper and wiper movements as to eliminate this loss of tension and therefore to do more efficient lasting.

A broad feature of this invention consists in a novel organization of an upper stretching gripper and a cooperating wiper, with means for relativelyoperating the gripper and the wiper to cause the wiper to advance to the gripper before the gripper releases the upper or alternatively to cause the grip per to retain its control over the upper until the wiper reaches the gripper, notwithstanding variations in the point to which the gripper moves in stretching the upper.

In a preferred embodiment of theinvention in' a mechanism herein illustrated the gripper is yieldingly moved to apply a previllustrated, the variation in the wiper movement is .eifected by moving the wiper through a constant length of time but at a variable rate, the wiper advancing mecha- I nism being set automatically by the gripper overdrawing mechanism to effect a slow or a fast advance as required until the gripper releasing movement in the cycle and then a correspondingly fast or slow advance to complete the full movement to a uniform final distance from the shoe edge, the wiper being also-the tack carrier as herein shown. It is therefore a feature of this invention to provide wiper operating means adjusted by a gripper operating means, and more particularly by a gripper controlled setting device which can diminish or augment, as the case may be, the speed imparted to the wiper.

Another feature of the invention consists in a novel organization of mechanism to impart a side wiping action to the wiper. This organization includes means for imparting plaiting movements to the gripper, a reciprocating wiper having a normally direct path of advance and means for causing the wiper to follow a different path including 'movements from and toward the normal path when the plaiting movements are employed. Preferably the wiper path is at one side of the normal path when the plaiting movements are in one direction and at the other side of said normal path when the plaiting movements are in the other direction. This organization also permits the wiper and tacker to be structurally combined and affords practical manufacturing advantages over prior mechanisms.

These and other features of the invention, including certain details of construction and more important combinations of parts, will be better understood from the following description and the accompanying drawings and the invention will then be more particularly pointed out in the claims.

Figure l of the drawings is a perspective View of so much of a well-known commercial lasting machine, of o the type shown in United States Letters Patent No. 1,029,840, granted June 18, 1912, for improvements in lasting machines, with this invention incorporated in it as is necessary for an understanding of this invention.

Fig. 2 shows the wiper operating mechanism in part sectional plan, while Fig. 3 shows the same parts in side elevation, the parts being in both Figs. 2 and 3 in the relative positions occupied by them before the advance of the wiper is commenced, as for example just when the overdraw movement of the gripper is beginning. Fig. at is a part sectional rear elevation f the wiper advancing mechanism in the same position.

Fig. 5 is a section on line 5-5 of Fig. 2. Figs. 6, 7 and 8 show in plan different positions of the wiper advancing mechanism as the wiper movement proceeds after a setting of the advancing mechanism for a maximum movement, that is, after the grippers have made a long overdraw; Fig. 6 shows the position with the parts set for the long wiper movement but before the movement is started; Fig. 7 shows the position occupied at the end of the first stage of the wiper advance, that is, when the wiper has moved up to the gripper while the latter I holds the upper under tension; and Fig. 8 shows the position of the parts when the wiper has completed its second stage of movement and is in tack inserting position.

Fig. 9 is a view to be contrasted with Fig. 7, and showing the position which the parts occupy at the end of the first stage of wiper advance after a setting of the advancing mechanism for a minimum wiper movement corresponding to and following a minimum overdrawing movement of the gripper.

Fig. 10 is a side elevation partly in section of the gripping and gripper 'carrying mechanism.

Referring to Fi 1, the camshaft 2 has bearings in a suitable frame not fully shown which also aflords support for various pivots and sliding parts including the pivot 6 upon which the gripper updraw lever 8 is fulcrumed. This lever is operated from a cam at the rear end of the shaft 2 and from its front end is pivotally suspended the gripper which comprises a movable jaw member '10 pivot-ally connected by a link 12 to the fixed aw member 14. The moving jaw member 10 is connected by pivot 15 to a push rod 16 that is depressed for closing the gripper by a rock shaft 18 having bearings in the lever 8 and one arm of which rests on a cam 20. The rod 16. works within the hollow stem 22 having a ball 24 at its upper end by which the gripper is suspended from the lever 8 and on which lower end of the stem 22 the fixed aw member 1. 2 is formed or attached. The push rod 16 is urged upwardly to open the gripper by a spring 26 held between an adj ustably fixed collar 28 on the stem and a sliding collar 30 bearing upwardly on a pin 32 projecting laterally from the rod 16 and passing through slots in the stem 22. The stem is embraced by a strap 34: connected to the plaiting mechanism and has a ball and socket connection 36 to an overdraw slide rod 38. The jaw member has a pivot 10 connecting it to a link 42 mounted upon a pivot 4. 1 on the jaw member 141. The link 42 is more or less parallel to the link 12 and of substantially the same length. There is a substantial amount of clearance between the rod 16 and the stem 22 and the passage through the ball member 24: is somewhat coned so that the rod 16 can tilt to some extent following its movement through the connection to the jaw member 10. In closing the gripper, the link 42 compels the tail of the jaw member to follow an arcual path, and although there is a certain angularity between the links 12 and 42, the tipping of the jaw member traces out a path which is practically arcual, and in the closing of the grippers the faces on the jaw member 10 and on the aw member 14 are maintained practically parallel to each other. Consequently, the faces of the projections on the jaws are always maintained practically parallel to each other and as the projections on the one jaw are caused to approach the others centrally the position of the gripping point from the centers of the jaws is practically uniform despite the thickness of the material gripped. Moreover, in the construction shown, the centers of the links are so arranged that the aw member swings loosely away from the fixed jaw to a considerable distance in opening and a wide spread of the jaws in this direction is assured.

The machine has suitable edge rests 30, 31 for the shoe, and the overdraw slide rod 38 is moved to position the gripper at the edge of the shoe by a cam on the rear face of a cam block 20 and is reversely moved yieldingly to carry the flange of the updrawn and tensioned upper inwardly from the edge of the shoe as far as the upper will permit by a spring arm 52, this distance, of course, varying with the size of the upper relatively to the last, the distance from the edge at which the gripper seizes the upper, and the elasticity or extensibility of the stock. After the gripper reaches the limit of its yieldingly efiected movement allowed by the stock in any particular cycle of its operation it pauses, holding the stock until the cam rotates far enough to allow the gripper to open and release the upper. In the meantime and before the release occurs, the wiper 54 is advanced in contact with the overdrawn upper to take control of the stock and prevent it from slacking back toward the edge of the shoe.

Referring now to Figs. 2 and 3', it may be seen that the wiper, which is associated with the tack block as distinguished from the relatively movable block of said prior patent, is reciprocated by a link 56 and its direction of movement is controlled by a guide member 58 and by a slide block 60 which is mounted upon the outer pivot 62 of the link 56 to slide in a guide formed on the machine frame, the guide preventing lateral movement of the rear end, of the slide 54.

The machine is provided with mechanism similar to that shown in the said priorpatent for giving plaiting movements to the gripper in either direction, and when the plaiting mechanism is in operation it is, desirable that the wiper should have lateral movements as well as to-and-fro or wiping movements. In the construction shown, the member 58 is given movements from the wiper slide 54- which at times may be converted into lateral movements to swing the outer end of the wiper slide 54,.the inner end remaining laterally fixed on the pivot 62. These movements of the member 58 are efiectedby a; link 64 pivoted at 66 to' between its ends. As the slide 54 is given a reciprocation, the link 72 acts first to break and then to straighten the toggle formed by the link 64 and the lever 68, and the toggle therefore moves the member 58 on the slide '54..

Referring to Figs. 2 and 5,. it will be seen that, the forward end of the member 58' has a cylindrical orifice in which is mounted a cylindrical block 74 having a slot. 76" adapted to contain for sliding movement therein a block 78. mounted on the lower end of an axially fixed shaft 80.. The block 7 8 has an arm 82 which is connected by a link 84' to the mechanism for controlling the pla-iting movements as is shown in Fig. 1, this mechanism being setby the usual knee lever 85.

Supposing the block 78 to be set as in Fig. 2 with its sides parallel with the direction of movement of'the rear end of the-slide 54, the movements of the member 58- by the breaking and straightening of the toggle 64, 68 will have no efi'ect upon the movement of the slide 54. When, however, the knee lever, 85 is shifted to cause plaiting movements of the gripper to be effected, the arm 82 is swung to position the block 76 and the slide block 74 at, an inclination to the normal direction of movement of the slide 54 and causes the member 58 to have a lateral component of movement first in one direction and then in the other during afull single reciprocation of the slide '54 by the bending and straightening of the toggle I 64, 68. By this construction the initial or retracted position of the wiper 55' and its final or advanced position over the shoe bottom are always. the same whatever may be slide since the rearward or tack receiving posltion and the forward position of the tack block beneath the driver will always be the same. The lateral movement of the member 58. when the block 7 8 is inclined will Y cause the wiper to move during its to-andfro reciprocation first to the right and then to the left or first to the left and then to the right, according as the, block 78 is positioned by the plaiting mechanism at. an inclination in one direction or in the other direction. The reciprocating movements of the wiper and tack block are so combined with the lateral movements of the member 58 that the wiper is constrained, in passing to its final forward position, to describe a curved path to one side or the other of its normal direct path of advance.

The gripper overdraw mechanism includes yielding means so that the gripper may, when it has put a certain strain upon the upper materials, remain stationary relatively to certain parts of its operating mechanism which continue their movement, and the position in which the gripper stops in its overdraw movement varies, with the amount of yielding of the upper material and the amount of margin allowed in cut-,

ting the upper as well as with the distance from the edge where the gripper seizes the upper stock. When, after such. a yielding of the grip-per overdraw mechanism and at a predetermined moment in the cycle of the machine, the pincers release their hold on the upper materials they spring away from the upper toreturn to their normal position relatively to the other parts of the overdraw mechanism. In prior machines of this type the wiper has been given a positive reciprocation of constant length and when the gripper engages a short or unyielding upper and consequently moves but a short distance in its overdraw movement, the wiper is liable to overtake and contact with the gripper, and if the opening of the gripper is so timed as to take place, undersuch conditions, prior to the contact of the wiper with it, the wiper will not have advanced sufliciently far to hold the tensioned upper from drawing back. T

Mechanism is provided for moving the wiper at variable rates controlled by the overdraw movement of the gripper so that when the gripper moves a short distance'before its release of the stock the wiper will move slowly and after release more rapidly, and when the overdraw movement of the gripper islong, as when a. yielding upper -1s being lasted, the first part of the wiping movement will be rapid and the later part of its movement after the gripper releases the stock will be correspondingly slow.

This mechanism comprises a wiper 55 on rocker arm 90 mounted on a rock shaft 92 and operated by a cam 91 on the main shaft 2. The rocker arm is connected by a link 96 to the joint of a toggle formed by the link 56 and a'link 98 whose inner end is pivoted at 100. It will be seen that movement of the rocker arm 90 will straighten and bend the toggle 56, 98 and advance and re- .tract the wiper slide provided the inner pivot 100 of the toggle is stationary and also 1 that if the position of the pivot 100 is varied themovement imparted to the slide 51 bya given movement of the rocker arm 90 will also be varied. The pivot 100 is on the outer end of a lever 102 having a fixed pivot at 101 in the frame 1, Fig. 3. The position of the pivot 100 is controlled by two toggles. one

comprising the rocker arm 90 and a link 106 and the other comprising a lever 108 to which the link 106 is pivoted at 105 and a link 110, Fig. 9, pivoted to the lever 108 at 111 and having a movable pivot 112 at its 7 opposite end.

The combined action of the toggles 90, 106 and 108, 110 is controlled by the overdraw movements of the gripper by means of a link 11 1, Fig. 1, pivoted at one end to an adjustable clamp block 116 on the over draw rod 38 and at the other end to an arm 118 on a rock shaft 120 mounted in the frame 1. vPivoted upon the lower end of the shaft 120, Figs. 3 and 1, is a U-shaped member or yoke 122 which is also pivoted on a stud 121 co-axial with and below the shaft 120. In the yoke 122 is mounted the shaft 112, above referredto, which forms one pivot of the link 110. The yoke 122 permits the pivot 111 of the toggle 110, 108

'to be swung into alinement with the axis of the shaft 120 and stud 121, Figs. 6 and 8, and out of alinement therewith as in Figs. 6, 7 and 9. F iXed on the shaft 120 and above the yoke 122 is an arm 128 carrying a pawl 130 normally held against a stop 132 in the arm 128 by a spring 131.

,urged by a stiff spring 111 secured to the .lower end of the shaft 112. Below the dog 110 and fixed on the shaft 112 is adog release 116. The link 110 is pinned to the shaft 112 and, therefore, pivotal movement of the link 110 with the shaft 112 causes the dog release 116. to engage the dog 110 and release it from engagement with the rack 112 when the pivot 111 is swung into alinemay swing about the center 120 to position the dog 110 opposite any part of the rack 112.. Pivotal movement of the link 110 with the shaft 112 to carry the pivot 111 out of alinement with the shaft 120 permits the spring 111 to cause engagementofthe dog 110 with the rack 112 as in Figs. 7 and '9. Movement of the shaft 112 to cause ,movement of the dog release 116 away from the dog 110 also causes the detent 136 to move out of contact with the pawl 130. A.

"stop 150 limits the forward swinging move- ,ment of the yoke 122, and a lug 152 on the yoke is engaged by the arm' 128 to swing the yoke 122 back into position against the stop 150 at the end of the cycle of the machine when the parts are in the position shown in v Fig. 2.

Referring now to Fig. 2 and Fig. 9, Fig. 2 represents the position of the parts at the beginning of a cycle. Fig. 9 represents the position of the mechanism after the parts have been set by a minimum amount of overdraw movement of the gripper and after the has moved a short distance. Comparthe overdraw rod, has-moved forwardly a short distance corresponding with the short overdrawmovement causing the arms 118,

128 to rotate with the shaft 120 and the pawl 130 to push von the detent1136 and swing the yoke 122 on its pivot 120 to position the pawl 110 near that end of the rack 112 which it =111Sl; reaches in its -movement. During this ,ofthis' toggle aet-ing upon the toggle 108,

10 to move the pivot 111 from axial alinement, with the pivot 120 thereby causing the dog release 116 to permit the dog to engage "the rack 112 and temporarily prevent further movement of the pivot 112. At the same time the rocker arm 90 has acted through the link 96 to partly straighten the toggle 56, 98. The effect of this straighten- .ingniovenient'of the toggle, however, has

been partly counteracted by the breaking of the toggle 108. 1 10 thereby moving the inner pivot'100 of the toggle 56,98 in a direction partly counteract the straightening of the toggle 56, 98, the movement given to the slide 51 being therefore slowed down to correspond with the short overdraw movement ef the gripper. 'Ihe dog 110 having eni igmQ with Fig. 9, it will be seen that in F1 9 the link 111, which is connected with gaged the rack 142, theposition of the pivot 112 of the toggle 108, 110 is fixed, and under these conditions is bent rearwardly. Further movement of the rocker arm 90 by bending the toggle 90, 106 causes a straightening of the toggle 108, 110 and also straightening of the toggle 56, 98, the action of these toggles then bemg combined to cause rapid movement of the wiper 154: during the later portion of its wiping movement.

In Fig. 6 is represented the position ofthe parts after they have been set by a maximum overdraw movement of the gripper and beforethe wiping movement has commenced. Here it will be observed that the toggle 108, 110 is in effect bent forwardly by reason of the rearward movement of its end pivot 112 and that the first movement of the rocker arm 90 causing the toggle 90, 106 to straighten will also straighten the toggle 108, 110, thereby causing the pivot 100 of the toggle 5.6, 98 to be moved in a direction to accelerate its straightening movement untilthe parts reach the position shown in Fig. 7, the accelerated movement of the toggle 56, 98 being, of course communicated to the wiper to cause a greater movement of the wiper to correspond with the long overdraw movement of the gripper. Further movement of the rocker arm 90 causes the toggle 90, 106 to be broken and consequently to break forwardly again the toggle ,108, 110' thereby moving the pivot 100 of the toggle 56,- 98 in a direction to retard the later movement of the Wiper, The position of the. partsafter the full movement is shown inFig. 8. In this figure the toggle 108, 110 has been sufficiently broken to cause the dog 140 to be released from the rack 142. This release, how

ever, is only momentary and as the roc zkerv arm moves back to produce the return move-- ment of the wiper, the pawl 140, reengages the rack and the mechanism. acts; inthe re verse order to producefirst. ahslow movement of the wiperand 'thena rapid move-; ment, and as the overdrawr'rod returns to normal position, the arm. 128fengage s the lug behind it: for engagement therewith ,at' the beginning of. the-next cycle, the

therate of movement ofrthe wiper when the overdraw movementis'a minimumand when that movement is a rmaximum has. been de scribed, and itwiHI-bennderstood that for: intermediate amounts 'ofover draw the rate of movement of the wiper during the over-- draw Q will be. correspondingly varied, the mechan sm acting automatically to increase parts thenf being i the positionsh owl in 2; Y .The action of the, mech sm f Varying the rate otmovement of the wiper when the overdraw movement is long and to diminish the rate ozt movement of the wiperWhen the overdraw movement is short. Furthermore, the entire extent of the wiper movement is constant and when the first part of the wiper movement is rapid the later part of-its movement is correspondingly slow and vice versa.

'The novel gripper mechanism herein shown anddescribed but not claimed is made the subject-matter ofanother of our applications, Serial No. 108,212 filed July 8, 1916.

Having fullydescribed our invention, We claim as new and desire to secure by United States Letters Patent;

1, In a machine of theclass described, the combination with an upper stretching grip per constructed and arranged to draw the upper over the last bottom varying distances under different conditions of work, and a cooperating Wiper, of means for automatically varying the movement of the wiper in accordance with the overdraw movement of the gripper.

'2, Ina machine of the class described, the

combination of an upper stretching gripper having an overdraw movement, a cooperating wiper, and means for relatively operating the gripper and the Wiper to cause the Wiper to advance to the gripper in its overdraw movement before the gripper releases the upper. I 1 I 3. In a machine of the class described, the combination of a gripper constructed and arranged to tension the upper varying distances over the lastbottom underditlerent conditions of work, 'a cooperating wiper, and; means to cause the gripper to malntaln' control o'ver the upper until the wiper reaches the gripper irrespectively of variations in the point to which the gripper moves .in stretching the upper.

4:. In a machine of the class described, an

upper stretching gripper, meanstor operat; ing the gripper yieldingly to draw the upper .:.over the ,ShOQ bOttOm, a cooperating wipenmeansifojr varying the-rate of wiping, movement of the wiper, and means set by the overdraw movement ofthe gripper tor rend-I are -,th we o -merem 1"; th W per proportional to the overdraw movement of the gripper.

5. A machi e of the class described .hav- 7 ing, 3 in ,g'combmation, a gripper constructedand arranged tooverdraw. the uppervarying me mtsgund r. difiere'nt conditions of. work,'

a cooperating wiper, means: for moving the w per between fixed lim ts, and means for ncr as n e in t a rat bf e e t qt; e wi erv ntmDwe l r cr m t e 2 7 long... H 7 M H, Y 6. In.a ma'cl1ine of the class described, the combinationof an upper stretching gripper, means for operating the gripper to tension h upper g; distan es frees t e last edge under different conditions of work, the wiper cooperating with the gripper to lay the upper upon the last bottom, and means for automatically causing the wiper to follow the gripper until the stock is released irrespectively of the varying distances to which the wiper moves over the last edge before the stock is released.

7. In a machinepf the class described, the combination of an upper stretching gripper, means for yieldingly operating the gripper to overdraw the upper, a wiper cooperating with the gripper to lay the upper upon the last bottom, and automatic means for rendering the wiper movement slow and short when the gripper moves a short distance over the last bottom, and means for causing the wiper to complete its stroke at a high rate after the gripper releases the stock.

8. In a machine of the class described, the combination of a gripper constructed and arranged to overdraw the upper varying distances over the last bottom under different conditions of the upper stock, a wiper cooperating with the gripper to lay the upper over the last bottom, and wiper controlling mechanism arranged to be set by the overdraw movement of the gripper to cause the wiping movement to be effected at one rate of speed until the gripper releases the upper and then to cause the wiper movement to be completed at another rate of speed.

9. In a machine of the class described, a reciprocating wiper, wiper operating mechanism comprising a toggle which is straightened to advance the wiper over the shoe bottom, means for operating the toggle, and means for varying the position of one pivot of the toggle to control the rate of movement of the wiper.

10. In a machine of the class described, the combination of a reciprocating wiper, toggle mechanism for advancing and retracting the wiper, a second toggle mechanism for varying the location of a pivot of the first toggle, toggle operating means,

and means for setting the second toggle so as first to diminish and then to increasethe action of the operating means on the first toggle. V

11. In a machine ofthe class described, the combination of a gripper having varying operative movements over the shoe bottom, a reciprocating wiper, a toggle for advancing and retracting the wiper, a second toggle constructed and arranged to vary the position of a pivot of the first toggle,

means for operatin the first toggle to ad- Vance and retract t e wiper, and means set by the movements of the gripper to vary the action of the second toggle upon the pivot of the first toggle whereby when the gripper has a short movement over the last bottom the second toggle will counteract the action of the first toggle, and when the gripper has a long movement over the shoe bottom the second toggle will accelerate the action of the first toggle.

12. A machine of the class described having, in combination, a gripper, means for yieldingly moving the gripper for applying a predetermined tension to the upper whereby the gripper moves variable distances from the shoe edge before it releases the upper, a wiper, and wiper operating mecha nism constructed and arranged to advance the wiper a corresponding automatically varied distance before the gripper releases the upper.

13. A machine of the class described having, in combination, a gripper, gripper overdraw mechanism constructed and arranged to move the gripper varying distances from the shoe edge before releasing the upper, wiping means, and means automatically set by the overdraw mechanism to eflect a slow or fast advance of the wiping means prior to release of the upperby the gripper according as the release of the gripper occurs near to or farther from the shoe edge.

14. A machine of the class described having, in combination, a gripper, gripper operating mechanism constructed and arranged to draw the upper varying distances from the shoe edge before, it releases the upper, said distance depending upon the conditions of the upper, a wiper having constant positions of retraction and advance, and means controlled by movement of the gripper for varying the speed of movement of the wiper before release of the upper relatively to its speed of movement after said release.

15. A machine of the class described having, in combination, a reciprocating wiper having constant positions of retraction and advance, and means for varying the path of the wiper between those positions.

16. A machine of the class described having, in combination, a gripper, means for imparting at will'plaiting movements to'the gripper, a reciprocating wiper; means for reciprocating :the wiper, in astraight path when no plaiting movements are imparted. to the gripper, and automatic means for causing the wiper to follow acurved path when plaiting movements are given to the gripper.

17. machine of the class'described having, in combination,"a gripper, means for imparting at will'pla'iting movements to the gripper in either direction, a reciprocating wiper,'and means for giving the wiper varying movements in a curved pathcorresponding in direction to either direction of plaiting movements of the gripper.

18. A machine of the class described having, in combination, a gripper, means for imparting at will plaiting movements to the gripper, a reciprocating wiper, means for reciprocating the wiper between two constant positions, and means for varying the path of movement of the wiper between said positions in accordance with the plaiting movements of the gripper.

19. A machine of the class described having, in combination, a wiper, means for reciprocating the wiper to and fro over the shoe bottom, means for moving the wiper laterally comprising a toggle which is bent and straightened in each reciprocation of the wiper, and means constructed and arranged to be set by the operator to render the movement of said toggle effective to move the wiper laterally during its to-andfro movements or to render the toggle movements ineffective.

20. In a machine of the class described, a gripper having a yielding overdraw movement which causes the overdraw movement to be short when the upper is short and to be longer when the upper is more ample, a reciprocating wiper, and mechanism for relatively operating the wiper and gripper to cause the wiper to assume control of the stock before the upper is released by the gripper when the overdraw movement of the gripper is short and to prolong such control when the overdraw movement is longer.

21. In a machine of the class described, the combination of an upper stretching machine, a cooperating wiper, and means for causing the wiper to advance substantially to meetvthe gripper before the gripper releases the stock, regardless of the distance of the point from the last edge at which the gripper seizes the upper or of the amount of movement permitted to the gripper determined by the elasticity or yield of the upper.

'22. In a machine of the class described, the combination of an upper stretching gripper constructed and arranged to draw the upper over the last bottom varying the distance under different conditions of work, a cooperating wiper, and means for varying the rate of movement of the wiper in accordance with the overdraw movement of the gripper.

23. A machine of the class described having, in combination, a gripper constructed and arranged to overdraw the upper varying amounts under different conditions of work, a cooperating wiper, and means for retarding the movement of the wiper when the overdraw movement is short so as to prevent contact of the wiper and gripper.

24. A machine of the class described hav ing, in combination, a gripper, means for imparting plaiting movements to the gripper, a reciprocating wiper, means for reciprocating the wiper in a straight line when no plaiting movements are imparted to the gripper, and automatic means for causing the wiper to follow a path including movements from and toward the normal straight path of the wiper when plaiting movements are given to the wiper.

25. A machine of the class described having, in combination, a gripper, means for imparting upper plaiting movements to the gripper in either direction, a reciprocating wiper having a normally directed path of advance, and means for giving the wiper during its advance a movement from and toward said normal path on either side of said path according to the direction of plaiting movement of the gripper.

26. In a step-by-s'tep lasting machine, the combination of a yieldingly operating overdrawing gripper and a wiper arranged for independent successive operation, with means constructed and arranged automatically to vary the relative timing of the wiper advance and the gripper release to enable the combined action of the gripper and wiper to overlap to varying extents in accordance with variations in the overdraw movements of the gripper.

In testimony whereof we have signed our names to this specification.

ARTHUR ERNEST JERRAM. FRANK BYCROFT KEALL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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