US596325A - Machine for stretching uppers - Google Patents

Description

`(No Model.) 5 sheetssheet 1 W. S. HAMM.

MAGHINE POR STRETGHING UPPERS.

Patented Dec. 28, 1897.

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W. s HAMM. MACHINE POR STRBTGHING UPPBRS. No. 596,325. Patenti-3d Deo. 28,1897.

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INVENTDH; ZM' (5t M I o @t WILLIAM S. HAMM, OF NFNV'TON, MASSACHUSETTS, ASSIGNOR TO AUGUSTUS- SEAVER, OF BOSTON, MASSACHUSETTS.

MACHINE FOR S-'I'RETCl-lllalG UPPERS.

SPECIFICATION forming part of Letters Patent No. 596,325, dated December 28, 1897. Application iled January 22, 1897. Serial No. 620,208. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM S. HAMM, of Newton, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Machines for Stretching Uppers, of which the following is a speciiication.

This invention relates to machines for stretching uppers over their last-s prior to their being secured to the insoles; and it has for its object to providea machine which may be operated to secure the drawing of the uppers over the lasts efcaciously and with the least expenditure of power and which will be so constructed that after an upper has been drawn taut the last may be reversed and the upper secured to the insole without removing them from the machine.

To these ends the invention consists of a machine embodying those features of construction and arrangement which are illus# trated in the drawings and which are now to be described in detail, and then pointed out in the claims hereto annexed.

Reference is to be had to the accompanying drawings, forminga part of this specification,` in which like letters of reference indicate the same parts or features wherever they occur.

Of the drawings, Figure 1 is a side elevation of one form of machine embodying my improvements. Fig. 2 is a front end elevation of the same. Fig. 3 is a plan View of the same.

Fig. et is a front end elevation of the machine with the base of the standard broken away and the head of the machine reversed or swung upon its axis, so as to bring the sole uppermostfor the purpose of securing the upper thereto. Figs. 5, 6, and 7 are crosssections showing the action of the gri ppers in grasping the edges of the upper and drawing it taut on the last. Fig. S is a section on the line 8 8 of Fig. 1. Fig. 9 is a section on the line 9 9 of Fig. 1. Fig. 10 is an enlarged section on the line 10 10 of Fig. 2. Fig. 11 is an enlarged section on the line 11 11 of Fig. 3. Fig. 12 is an enlarged 12 of Fig. 3.

In carrying out my invention, which it will be understood is not limited to those details of construction which I have elected to illustrate in the drawings and which I shall now section on the line 12 chine.

proceed to describe, I employ a standard a, having a suitable flattened base a and a laterally-projectin g bracket c2, in which are supported some of the operative parts of the ma- Upon the upper end of the standard a is s ecured a bearing-bracket CL3, having a suitable sleeve-like bearing c4. The casting or head b, upon which are mounted the grippers for drawing the upper taut over the last, is .provided with a tubular trunnion b', projecting through the bearing a4 and equipped on its other end with a notched collar h2 and with an arm b3, clamped thereto, and provided with a counterbalancing weight .194. The head or bracket b (shown in Figs. 1 and 12) is curved downwardly and forwardlyand is formed with two steps or abutments c c, having upwardly-projecting points c' to receive the last, there being a recess or cutaway portion between the steps, as more clearly shown in Fig. 12. The head is provided with an upwardly-projecting bracket d, in which is rotatably clamped by a cap d' a stud d2, which is formed at its forwardlyprojecting end into a bearing d3 to receive a vertically-movable bar d4, having a point d5 to enter a recess in the last, as, shown in Fig. 1, and to clamp it against the steps on the head or bracket b.

It will be seen that the bar d4 is arranged in advance of the rear step c, so as to cause the last to be clamped firmly against both sets of projections c c'. The bar is formed for a portion of its length with rack-teeth, with which a pinion d@ on a shaft di, equipped with a hand-wheel'cls, engages and by means of which the bar may be raised or lowered. Its upper reduced and threaded end d is provided with two lockingnuts d10, between which and the upper end of the bearing CZSis placed a strong helical spring d of su'liicient strength to'raise the bar d5 to its uppermost position. For the purpose of locking the bar at any desired position I provide a springheld cam C112, secured to a stud-shaft mounted in the bearing cl3 and adapted to be held by its spring Z13 against the bar, as shown in Fig. 10. When the hand-wheel d8 has been rotated, so as to force the bar d4 downward, the cam CX12 bears against the said bar and locks it against upward movement. The

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shaft of the cam is provided with a handle (ZM, whereby when the cam is rocked against the stress of the spring and out oi engagement with the bar the spring d will force the bar upward to its normal elevated position.

The machine is so constructed that after the last is clamped upon the steps by the bar i or clamping devices just described the whole head may be rotated, so as to reverse the last and bring its sole uppermost. In order to lock the head at any desired position, the notched collar b2is provided, as hereinbefore stated, there being a latch e pivoted in ears c' and which is adapted to enter any one of the notches in the collar. mally held in engagement with the walls of the notches by a spring c2, but it is adapted to be drawn out from engagement therewith by a foot-lever c3, passing through the standard and pivoted on the base a and having its rear end connected with the end of the latch by an adjustable link el, as shown in Fig. l. By depressing the end oi.' the foot-lever c3 the latch is disengaged from the collar, and the operator may then freely swing the head around in any desired position.

For the purpose ot' stretching the upper over the last I employ two sets of grippers on each side of the last which are arranged to draw the edges of the upper down and then under the last to entirely remove all the wrinkles and creases and t the upper perfectly upon the last; and in addition thereto the grippers which stretch the toe portion of the upper are arranged to slide forward, so as to stretch the upper not only transversely of the last, but `longitudinally thereof also.

I do not provide a gripper for the extreme toe end of the upper, as the stretching of the upper in the central longitudinal line of the last is accomplished by manually-operated pincers, which are adapted to be rested or fulcrumed in notches c2 c2 in the forward end of the head or bracket. Preferably the grippers on each side of the last are arranged `to grasp the upper at a point between the heel and the ball or at the shank and at a point in front of the ball; and hence the first-mentioned grippers are arranged to move only downward and transversely of the last, while the latter are arranged to be moved downwardly and inward and forward by means of devices to be described.

I shall first describe the grippers which are arranged beneath the shank of the last.

Referring more particularly to Figs. 5, G, '7, and S, it will be seen that the head or bracket b is provided with two laterally-pro jecting lugs ff, with grooves or depressions, in which are clamped by caps ff two bars f2 f2, the ends of which are secured in brackets ffi", which project upwardly and outwardly. The bars f2 are preferably formed with enlarged heads f, having ears or lugs f5, and the brackets f3 are each formed with an inwardly-projecting lug f6 to receive the lower end of the bar, being secured to the head f4 The latch is nor` by screws f7. (Shown in dotted lines in Fig. S.) In the lugs f5 of the bars f2 are pivoted arms g g, each of which is provided at its upper end with a jaw g', adapted to cooperate with a jaw g3, mounted on another arm g2, which is movable in parallelism to the arm g. rlhe arms g and gzare connected by cross-links g4 g5, which are pivoted together at their intersection and are pivoted at their upper ends to the said arms, They are each provided with a pin projecting into slots in the said arms, and the links g5 are each provided with an extension g, so that by raising or lowering the latter the jaws g and g3 may be caused to approach or recede from each other. For operating the two sets of grippers in unison I provide the following devices: 71, 7L' are toggle-levers pivoted together and respectively pivoted to the ends of the extensions g" of the links g5 and to the upper ends oi' the brackets f3. Springs h2 hold the jaws g g3 normally open and the arms g outward, the latter' being provided with lingers rf with adjustable screws g8, abutting against stops g on the brackets, which limit their outward movcment. The springs Z1,2 are assisted in maintaining the arms g in their outward positions by additional springs 7b3, each of which has one end attached to a finger g7 and the other end attached to a pin on the bracket f3. The head or main bracket Z) is provided with a socket Z110 to receive a vertically-movable pin t', which projects thereinto and which is formed on the end of a bar i', projecting below the head. The bar i' is provided with a cross-bar i2, the outer ends of which are connected by chains 3 with the pivots ZU* of the toggle-levers 71, 7L', so that by drawing downward on the bar 'i' the toggle-levers are straightened out, with the result that the edges of the upper are clamped between the jaws g g3 and are drawn downward and under the last, as pictured in Figs. 5, (i, and 7, which show the various positions of the parts as this is being accomplished. In order to lock the jaws in their operative locking positions, a cam i5 is secured to a shaft i, mounted in the head l) and provided with a handle il, as shown in Fig. l. The spring is holds the cam against the pin t', so that when the bar t" is drawn downward the cam Z5 engages it and prevents any backward movement until it is moved out of engagement therewith by the handle Z7.

The grippers for the edges of the upper near the toe end of the last are shown in Figs. 9, 11, and 12, to which reference is to bc had.

The bracket l) is provided at its forward end with a slidewayj to receive a carriage Zr., having tongues Zt sliding in said slideway and held therein by strips 7a2. The carriage is adapted to be reciprocated or adjusted by a screw Z, having its end threaded into a nut Z', formed in the under side of the head and having on its outer end a sleeve Z2, formed with a hand-wheel Z3. The screw Z is formed with a flange Z13 abuttingagainst the carriage, so that by turning the hand-wheel in one di- IOO IIO

hand-wheel in the other direction it will be drawn forward, as will be readily seen. The carriage is formed with two outwardly-projecting wings or plates k12, suitably braced by webs k3 and formed at their outer ends with split bearings k4, in which are mounted or journaled posts m. The latter may be locked in position by bolts h5, which actv to clamp the bearings 7a4 firmly therearound. Projecting outward from each post is an arm m', formed therewith and on the end of which a collar m2 is clamped, as shown in Fig. 9. Keyed to each arm m', so as to be prevented from rotating, while free to slide longitudinally therein, is a sleeve m3, formed with an ear or lug m4, into which the screw m5 is threaded. Each screw m5, which is provided with a hand-wheel m6, passes loosely through a lug m7 on the collar m2 and, as just stated', is threaded into the lug m4 on the sleeve m3, so that when the hand-wheel lm6 is turned in one direction or the other the sleeve m3 is forced forward or back along the arm m. The sleeve 'm3 is likewise provided with two upwardly-projecting ears m8, between which and in which is pivoted a lever n, which passes through an aperture m9 in the post m and is provided on its end with a grippingarm fn, having a jaw n2. The lever n rests upon a pin m10, inserted in a socket in the postm and resting against a spring m11, which latter rests upon a disk m1?, which may be adjusted by a screw m13 to regulate the tension of the spring. The spring 'm11 is of sufcient strength to cause the pin m10 to hold the lever n in its uppermost position, there being an adjustable screw m14, which acts as a stop to limit the upward movement of said lever.

Connected to the arm 'n' by cross-links 0 0', similar to those described at g4 and g5, is another gripping-arm n3, likewise equipped with a jaw n4 to cooperate with the jaw n2, above referred to. The gripping-arm n3 may be moved toward and from the gripping-arm n and in parallelism therewith by means of chains p p, connected to a cross-bar q and to extensions 02 of the links 0. The cross-bar q is mountedupon a stud g3, projecting-rearward from a hanger Q4, having a downwardly and rearwardlyprojecting finger Q5 for a purpose to be described, which hanger is secured upon the lower end of a bar q, sliding in a socket 7914 in the carriage lc. A locking-cam r on a shaft r', mounted in the carriage la and provided with a handle r2, is held in engagement with thepin Q6 by a spring r3, so that after the hanger g4 has been depressed to cause the jaws n2 n4 to engage the edges of the upper and draw the latter downward the cam fr engages the pin Q6 and holds the grippers in their operative position.

In drawing upon the chains p p to cause the gripping of the edges of the uppers the levers are swung downward and the 'upper is drawn taut by them over the last.

By mounting the grippers on the post m it is permitted to adjust the grippers so that their gripping-jaws will lie parallel to the sole of the last irrespective of the particular shape of the latterthat is to say, if the toe of the last is pointed the two sets of jaws can be adjusted so that each set will be parallel to the edge of the sole adjacent to it.

The rear gripping-jaws may remain parallel and do not need to be adjusted, while in order that the machine may be used for all sizes and styles of shoes it is essential that the forward grippers may be adjusted to lie at any angle to each other, and hence this is one of the important features of my invention.

To assist the clamps in holding the posts against rotation when there is a lateral strain on the ends of the lever n n, caused by the carriage being drawn forward, I provide each post m with an extension m15, formed into a segmental ratchet, with the teeth of which a dog m16, pivoted on the plate 7G12, is' caused to engage by a spring m17.

When the levers are adj usted with the posts m, the .dogs m16 engage the teeth of the segmental ratchets and lock the posts against backward rotation.

For the purpose of drawing downward upon the bar t" and the hanger g4 to operate the grippers I provide foot-levers S and t, respectively, fulcrumed on the base ct.

In the bracket d2,before mentioned,I mount two sliding bars s and t', which are connected to the foot-levers by adjustable pivoted links s2 and t2 and which are normally held in their raised positions by springs s3 t3.

The bar s is equipped at its upper end with a yoke 84, with inwardly-projecting fingers S5, between which the bar i may freely pass, but which will, when said bar is between them and thevrod or bar s is depressed, engage an enlargement or head 2512 on the bar 'i' and draw it downward. The upper end of the bar t is provided with a head t4, which projects forward, so as to lie above the finger Q5 of the hanger 14 when the head, with the grippers, is in the position shown in Fig. l, so that when the lever t is depressed the hanger g4 is drawn downward and the grippers connected therewith consequently operated.

Upon depressingeither of the foot-levers s ort the cross-bar t2 or the cross-bar q and their corresponding grippers are actuated, and upon removing the foot from said levers they are elevated by the springs s3 or f3, while the grippers remain locked by the hereinbeforedescribed devices.

The operation of the machine is as follows: The insole is secured on the last by several tacks, and after the upper is drawn over the last the latter is placed on the abutments on the head, after which it is rigidly lockedthereon by turning the hand-wheel d8 until the IOO IIO

point d5 enters the recess in the last and forces the latter against the points c c. Then the levers n n are adjusted about their pivots until the jaws of the forward grippers are parallel to the edges of the sole of the last, and the carriage is also adjusted to carry the said grippers in position to grasp the edges of the upper in front of the ball. Then the foot-levert is depressed, which at one action causes the front gripper to tightly grip the edges of the upper and draw them downward, and as the grippers begin their drawing action after having grasped the upper the hand-wheel Z3 is turned so as to feed the carriage 7s forward. Thus the upper is drawn taut over the last downward and forward toward the toe with an even pressure on both sides of the last. After this has been accomplished the handwheels m6 are rotated to force the levers m and their grippers inward under the last far enough to allow of tacks being driven through the edges of the upper into the insole. Then the lever s is depressed and the grippers at the shank grasp the edges of the upper and draw the said upper taut downward and inward under the shank of the last. The extreme toe portion of the upper is lasted over by means of manually-operated pinceis,\vhich may be fulcrumed in the notches c2, as hercinbefore explained. The upper is now ready to be tacked to the insole, so that after depressing the lever e3 to disengage the latch e from the notched collar b2 the operator partially revolves the whole head and brings the sole uppermost, as shown in Fig. 4:, where he can easily drive the tacks through the edges of the upper into the insole.

It will be observed that by constructing a machine in accordance with the foregoing I provide a revoluble abutment, which operates to resist the thrust of the grippers and against which the latter exert their force in drawing an upper taut over a last, and that after the upper has been suitably stretched over the last the grippers maybe disengaged from the foot-levers or power devices and the whole head or abutment partially rotated, the grippers remaining locked during this operation. This is of importance in my invention, since the last being arranged sole downward the operator may watch the upper during the stretching process to prevent it from being drawn out of shape or stretched too far on one side or the other, and if by chance the upper has been stretched too far on one side by one of the front grippers he may easily adjust the grippers by means of the handwheels m to lay it properly over the last.

The grippers are automatically locked in position to maintain the upper in its stretched condition and remain so when the head is revolved; nor does the adjustment of the front grippers change their relationship to the lever t, for it will be observed that the hanger has a long finger q, which extends under the projecting portion of the head and slides thereunder when the carriage is adjusted. Again, by constructing the grippers as hereinbefore described their jaws are automatically clamped together on the upper and then they are moved bodily by a single movement of the foot-lever, so that two distinct operations with two separate mechanisms for clamping the jaws together and operating the grippers are not necessary.

It will be understood that the invention is not limited to the details ot' construction which are shown and described, since it may be embodied in machines of other forms and provided with mechanism other than that illustrated in the drawings.

Having thus explained the nature of the invention and described a way of constructing and using the same, although without attempting to set forth all of the forms in which it may be made or all of the modes of its use, I declare that what I claim is- 1. In a machine for stretching uppers, the combination of a reversible support affording an abutment for a last; upper grasping and stretching means carried by said support; a lock to hold said means in grasping and stretching condition; and an operating member on a iixed support, the said upper grasping and stretching means and the said operating member having disconnected parts interlocking only for combined movement relative to the reversible support.

2. In a machine for stretching uppers, the combination of a support rotativel y mounted for reversibility and affording an abutment for a last; upper grasping and stretching means carried by said support; a lock to hold said means in grasping and stretching condition; and an operating member on a fixed support, said means and theoperating member having disconnected parts interlocking for combined movement relative to the reversible support, without obstructing rotary movement of the latter.

In a machine for stretching uppers, the combination of a reversible support affording an abutment for a last; a carriage longitudinally movable on said support; upper grasping and stretching means on said carria-ge; a lock to hold said means in grasping and stretching condition; and an operating member on a fixed support, said operating member and the grasping and stretching means having disconnected parts interlocking for combined movement relative to the reversible support, with provision for adjustment of the carriage longitudinally of said support.

4. In a machine for stretching uppers, the combination of a support affording an abutment for a last; grippers movably mounted on said support so as to move transversely of and toward and away from the last thereon; and a toggle between the grippers and the support and operating both to close the grippers and to move the same relatively to the support.

5. In a machine for stretching uppers, the combination of a support affording an abutment for a last, an arm pivoted to the said IOO IIO

support and having a jaw to engage one side of an upper on such last, a complemental jaw to engage the opposite side of the upper, a-

lever pivotally connected with the arm and with the complemental jaw, and a toggle one member of which is connected with the said lever and the other with the support.

6. A machine for stretching uppers, comprisin g alast, an abutment therefor, two pairs of oppositely arranged grippers, and means for causing one pair of grippers to be moved inwardly under the last, and additional means for causing the other pair of grippers to be moved longitudinally of the last.

7. In a machine for stretching uppers, the combination of areversible support affording an abutment for a last; grippers on said support and arranged to act upon an upper on such last; means carried by the support for closing the grippers on the upper and for moving them to stretch the same, said means including a reciprocating bar having a head or lateral projection; an automatic lock associated with said bar; and an operating member on a fixed support and having a part coacting with the projection or head on said bar to secure combined movement of the latter and the operating member relative to the reversible support.

8. A machine for stretching uppers, comprising a reversible abutment to receive a last, two pivoted gripping-arms pivoted to the abutment and each having a coacting gripping-arm connected thereto, a stationary standard, an operating-lever mounted on said standard, and suitable connections between said lever and the gripping devices.

9. A machine for stretching uppers, comprising an abutment, gripping-jaws arranged adjacent the abutment, means for closing the jaws and moving them transversely of the last, and additional means for moving said jaws longitudinally of the last.

10. A machine for stretching uppers, com' the jaws bodily movable in the direction of its length, means for closing the jaws and swinging the lever transversely of the last, means for adjusting said lever longitudinally toward and from the last, and means for adj ustin gsaid leverbodilylongitudiually of the last.

12. A machine for stretching uppers, comprising an abutment, gripping-jaws arranged adjacent the abutment, a pivoted lever for the jaws, means for closing the jaws and swinging the lever transversely of the last, and means for adjusting said lever to present the jaws with their edges parallel to the edge of the sole of the last.

13. A machine for stretching uppers, comprising an abutment, gripping-jaws arranged adjacent the abutment,means for causing the jaws to stretch the upper, a pivotal support for said jaws adjustable to present their edges parallel to the edge of thesole of the last, and means for locking said support against backward movement on its pivot, substantially as described.

14. A machine for stretching uppers comprising an abutment adapted to receive a last, gripping-jaws mounted upon the said abutment, a carriage movable relatively to the abutment, gripping-j aws mounted on said carriage, and means for operating said jaws to stretch the upper.

15. Ina machine for stretching uppers, the combination of a reversible support aordin g an abutment for a last, a reciprocating pin on said support and adapted to engage the vlast and hold it against the abut-ment, and

means for manipulating said pin.

16. In a machine for stretching uppers, the combination of a reversible support affording an abutment for a last, a reciprocating pin on said support and adapted to engage the last and hold it against the abutment, means for moving said pin into engagement with the last, and an automatic lock to hold said pin in such engagement.

In testimony whereof I have signed my name to this specication, in the presence of two subscribing witnesses, this 13th day of January, A. D. 1897.

WILLIAM S. HAMM.

Witnesses:

A. D. HARRISON, P. W. PEZZETTI.

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