USRE6525E - Improvement in machines for crimping leather for boots and shoes - Google Patents

Description

2 Sheers--Sheei i.

S. W. IAMISDN. Machine for Crimping Leather for Boots and Shoes.

Reissued Jun 29, 1875.

Davey $01:

Wfzzasaas:

N-FETERS, FHOTOLI7HOGRAPHEE WASHINGTQN. D. C,

2 Sheets--Sheet 2.

S. W. .IAMISUN.

Machine for Urirfiping. Leather for Boats and'Shq'es. No. 6,525, Reiss'uedlune29,1875.

N-PEIERS. PNOTB-LIYMOGRAPMER. WASNIHGTON. D. c.

UNITED S'rArEs SAMUEL JAMISON, OF NEWARK, NEW JERSEY, ASSIGNOR, BY MESNE I PATENT OFFICE.

ASSIGNMENTS, TO THE S. W. JAMISON BOOT AND SHOE CRIMPING MACHINE COMPANY, OF NEW YORK CITY.

IMPROVEMENT IN MACHINES FOR CRIMPING LEATHER FOR BOOTS AND SHOES.

Specification forming part of Letters Patent No. 139,717, dated June 10, 1873 reissue No. 6,525, dated June 29, 1875; application filed June 18, 1875.

The machine herein shown in illustration of my present invention, in the main, resembles the machine shown and described 'in the patent last abovenamed. I have, however, improved the structure of the crimping-jaws. I have also, with a view to producing more perfect work, made use of a series of pairs of jaws, in place of one pair, as formerly, each pair being caused to exercise a pressure that is regulated and controlled independently of the others. I have also constructed the added jaws in a way to adapt them to act as finishing-jaws, to perfect the work already performed by the jaws that first act on the material.

The nature of my invention, and the manner in which the same is or may be carried into efiect, will be readily understood by reference to the accompanying drawings, in which Figure l is a front view, in perspective, of a machine made in accordance with my invention. Fig. 2 is a rear elevation of the same. Fig. 3 is a view of one of the crimpingjaws detached; Fig. 4 is a transverse vertical central section of one of the finishingjaws and one of the crimping-jaws, together with the adjusting mechanism. view of one of the finishing-jaws.

The hinged and laterally-adj ustahle ways K for the crimping-jaws, and the weights 15,

Fig. 5 is a and rods and levers 12 13 1416, for drawing said ways toward each other, are arranged and operate in the manner described in section III of the specification of my Patent No. 99,906, above referred to. So, also, my present machine contains the same arrangement of the system of levers 17 18 19, connectingrod 20, andtreadle 21, as described in the specification of said patent. The adjusting mechanism of the. crimping-jaws D D is constructed and combined with said jaws in the manner described in section II of said patent. The gearing for imparting an up-and-down movement to the jaws is also constructed and. arranged as described in section[ of the speciiication of said patent, with the exception that I now dispense with the two diiferentsized gears, by means of which, in the patented machine, the jaws. were moved up at a greater speed than they were moved downward; and in lieu thereof I use a single intermediate gear, 8, bymeans of which the jaws are caused to travel at'the same rate of speed up and down. This I am enabled now to do by reason of the peculiar construction, hereinafter described, ot' the crimping-jaws, which renders unnecessary the slow downward movement of the jaws required under the old construction, in order to avoid tearing or injuring the leather. The tripping devices and clutch are also constructed and arranged in the manner described in the aforesaid patent;

Further reference to the above-recited.

mechanisms will not, therefore, be necessary, and I shall confine myself to a description of those devices in which my present invention is found.

There are two crimping-jaws, D D, designed to pass down on opposite sides of the tree or form N. By the action of these jaws the leather on the tree is crimped into shape. Each jaw being a counterpart of the other, a description of one will answer for both.

I now dispense with the clarnppiece, which, in the machine described in Patent No. 99,906, was located in the lower part or heel of the jaw, and I also materially change the contour of the jaw and the corrugations on its inner face. The change in the contour of the jaw consists in making its heel or lower part projecting, so as to constitute a beak or point, a,

the jaw being inwardly beveled on each side thereof,.as shown at b, so that when the jaw descends the leather, when first acted on, will hug the point only of the jaw without clinging to the beveled sides. In the machine as luretofore made the lower part of the jaw was simply'rounded, its edge being-at all parts perpendicular, or substantially so, to the side of the tree. The consequence was that theleather, when first pressed down by the jaw, would hug and cling to the lower edge of the jaw throughout the whole, or nearly the whole, extent of the same. In this way the leather would be forced or spread away from the heel instead of being drawn or concentrated toward it, as it should be, in order to produce a properlycrimped front, and by reducing the quantity of leather at the heel there was danger of tearing the front at that point. Under the present construction this difficulty is obviated. The projecting beak a, which takes hold of that part of the leather which forms the heel or lower rear corner of the boot-front, is the only part of the jaw to which the leather can cling when the jaw reaches the tree and first acts on the leather, and the beveled parts I) on each side thereof effectually prevent the clinging or hugging of the leather at those points. The interior face of the jaws is formed with a series of central upwardly-curved corrugations, c, which havev the effect of crowding or con centrating the leather toward the heel of the boot-front as the jaw descends, in this respect differing essentially and materially from the jaw in my previously-patented machine. The middle or highest point of each curve should, preferably, be in a vertical line, passing through the center of the beak a of the jaw. The object of this formation of the corrugations is, as above intimated, to crowd or concentrate the stock toward the heel of the criniped front, where the leather must be most drawn out, where the greatest strain comes, and where the most material is needed. Vere the cen' tral corrugations downwardly curved they would have exactly an opposite effect, and would tend to spread the material away from the point where it is not required. The toe portion d and leg portion 0 of the jaw are also provided'with corrugations; but these are so formed, as shown, as to divert the material in front of them from the heel, so as to prevent excessive concentration of stock at the latter point, and to equalize, as far as possible, the thickness of the material of the finished and crimped front. The proportional dimensions of the part with upwardly-curved central corrugations and the toe and leg port-ions are such that the said central corrugated part will have traversed only about one-h alf of the bootfront when the toe and leg portions have passed by or below the same. Thus, after the side corrugations d and e have passed by and-below the leather, the latter will still be acted on by the central corrugations c, the upper half of which will still be required to traverse the front before the jaw will have completed its downward movement. In this way the final strain upon the crimped front is given by the upwardly-curved central corrugations at a point where that strain is most neededvia, the heel-and at a time when sullicient leather has been crowded into the heel to allow it to be fully stretched and brought to a point without danger of rupturing the front or tearing out the corner.

It will be obvious that the toe and leg corrugations might be dispensed with, inasmuch as the edges d 0 would act on the leather to a great extent like the corrugations. It is also to be remarked that the upwardly-curved central corrugations maybe only in the upper half of the jaw, or thereabont, and that they need not be ranged in a continuous and regular series from top to bottom of the jaw. So, also, the construction of the beak a, and bevels b can be modified. I have, however, shown the jaw in the form in which I believe it to be best adapted for practical use. 7

The use of these crimping-jaws is not necessarily confined to the special machine herein described. They may be employed in crimping-brakes, so called, or other suitable mechanism for crimping.

As shown in the drawing, and as hereinbefore indicated, I employ, in addition to the crimping-jaws that first act on the material, other jaws that perfect the work already done by the first set. The added jaws which I here employ are smooth-faced, and move up and down with the crimpingjaws, following the latter in their descent, so as to act on the crimped front as it leaves the crimpingjaws, smoothing and taking all wrinkles out of the material. These jaws I shall term the finishingjaws. They are represented at E E. Each is composed of a supporting-plate, f, faced on the inner side with a separate plate, g, which is designed to be in contact with the crimped front. This plate 9, which may be considered to constitute the finishing-jaw proper, has its lower edge 9 shaped to fit exactly the upper edgeof the tree, so that the jaw in its descent will come in contact with the tree simultaneously throughout its length. The jaw g is 9 but its ends are free, so that they may be set out more or less from the backin g bymeans of screws h, whose ends bear against the free portion of ,the jaw. The latter is made of steel, or suitable flexible and elastic material, so as to permit of this adjustment, the object of which is to adapt the jaw to the varying thickness of the boot-front operated on said front, when it leaves thecrim ping jaws, having usually more thickness in the middle than toward the two ends. The finishing-jaws are preferably arranged above the crimping-jaws at such distance, as shown, that they will take hold of the .crimped front before it is entirely released by the crimpingjaws.

The two finishing-jaws are adjusted toward and away from each other by mechanism but of an oscillating movement. This oscillation is controlled by a set-screw, 7c, passing through a curved slot in the plate F into the stationary plate G, fixed on the axis Z, in rear of plate F. The jaws are set closer together, whenever desired, by means of a disk, H, one for each jaw, loosely mounted on the spindle Z, and having on its rear. face a double helical cam, which fits a corresponding cam-surface on the face of the bracket I, these parts being similar to those employed for the same purpose with the crimping-jaws. The head of the spindle l is held in the bracket and its screw- ,threaded end projects beyond plate F, and is provided with a nut, by means of which the parts when adjusted can be tightly clamped together. v

The upper end of the jaw is connected with bracket I by means of a plate, in, held adjustably to the jaw by ascrew, a, passing through a slot in the plate m, the latter being connected with a jointed head, 0, on the bracket by means of a divided right-anddeft screwthreaded rod, 11, having its two contiguous ends united by a correspondingly screwthreaded coupling-sleeve, r," by means of which I the working length of the rodp can be increased or decreased at pleasure. When the .parts 10 and 0 are pressed down, so as to be in line, the jaw will be held rigidly and prevented from giving back; but by breaking or elevatii'ig the joint between them, as shown on the left in'Fig. 2, the jaw will be tilted back on its lower joint or axis 45. According to the work-ing length of the rod 1), the upper end of the jaw, when the parts 19 and 0 are in line,- will be forced out more or less, this depending upon the adjustment of the lower part of thejaw l, efl'ected by means of cam H. The adjustment of the jaws toward'each other is thus provided for. It is, however, necessary also to provide for the oscillation of the jaws on the spindles l, in order to conform to the varying position of the tree or form, which is made adjustable, or so as'to be tilted endwise, as described in my Patent No. 99,906. This provision is found in the mode of holding the slotted plate m to the jaw, and the slotted plate F to the plate G, by their respective setsorews n and 70. By loosening these screws and the nut on spindle l, the jaws can be set at any desired angle. The tilting of the finishin g-jaws on their axes i" is effected by means of bent levers c, one for each jaw, riveted to brackets I or arms '13, extending therefrom, and formed with slots in their shorter arms, through which pass pins projecting from arms 0 on the parts 0. By taking either lever by the handle and vibrating it up and down, the jaw will be correspondingly tilted forward or back, as seen in Figs. 1 and 2. The brackets I of the finishing-jaws slide up and down on independent ways J, arranged within or between the ways which carry the crimpingjaws. The ways J are hinged precisely like' the crimping-jaw ways, and'are provided with an independent system of levers, connectingrods, and weights for drawing them together, arranged in the same manner as the like devices for the crimpingjaw ways, as fully shown in the drawings, and therefore requirbetween the hinged ways of the two sets of jaws, and work up and down in fixed stationary guides L. y

I contemplate using the machine for 'crimping not only leather, but cloth, serge, &c. In the latter case the finishing-jaws should be heated, which could be readily effected by making them hollow and beating them internally by gas.

I have described what I consider to be the best and most practicable arrangement of the crimping and finishing jaws, and their acc'es sories. It is manifest, however, that the details of arrangement and construction can be variously modified without departure from the principles of my invention. I do not, therefore,limit myself to the precise details herein described and shown; but

What I claim, and desire to secure by Letters Patent, is-

1. The crimpingjaws, each formed with a projecting beak or point, and inwardly beveled on each side thereof, substantially as shown and described, so that when the jaws descend the material, when first acted on, shall hug the beaks or points only of the jaws, without clinging to the beveled sides.

2. In a machine or apparatus for crimping leather for boot and shoe fronts, a crimpingjaw, the acting face of which is provided, between the toe and leg portions, and at the point where it crimps the leather over the bend in the tree or form, with upwardly-curved corrugations, arranged substantially as described, to concentrate or crowd the leather toward the heel or lower rear point of the boot-front during the descent of the jaw, substantially as herein shown and set forth.

3. A crimping-jaw for crimping boot and shoe fronts, formed with a projecting beak or point, and inwardly beveled on each side thereof, and provided with central upwardlycurved corrugations, with or without toe and leg corrugations, substantially as herein shown and described.

4:. A crimping-jaw constructed with toe and leg portions, and with a central part provided with upwardly-curved corrugations, substantially as described, the said central part being of such relative dimensions to the toe and leg portions that, during the descent of the jaw,

it will have traversed only about one-half the boot and shoe front when the toe and leg portions of the jaw are about to release or quit the same.

5. In a crimping-jaw for crimpin boot and shoe fronts, the combination of the central upwardly-curved corrugations with toe and leg corrugations, formed substantially as shown. and described, so as to divert from the heel or lower point of the front of the material on each side of said central corrugations, for the purposes set forth. 7

6. In a crimping-machine, the combination, with thecrimping tree or form, of a series of pairs of jaws, which act in succession on the material to be crimped, and-a corresponding series of adj ustably-weighted levers, by which the pressure of each pair of jaws upon the material may be regulated independently of the others, substantially as set forth.

7. In a crimping-machine, a series of pairs of independently-adjustable jaws, each pair of which jaws exercises upon the material to be crimped a yielding pressure, induced by ad-' justlably-weighted levers, substantially as set fort 1 g 8. In a crimping-machine, the combination, with the crimping-jaws, of finishing-jaws, following said crimping-jaws, and acting on the crimped front as it leaves the latter set of jaws, substantially as shown and described.

9. The finishing-jaws, having such a contour as to fit or come in contact simultaneously at all points of their lower edges with the tree or the crimped front thereon, and arranged immediately above'the crimping-jaws, to take hold of the crimped front before it is entirely released by the crimping-jaws, substantially as shown and set forth.

10. The finishing-jaws, formed substantially for drawing together said ways, substantially as shown and described.

12. The combination, with the finishing-jaws, of mechanism, substantially as described, for setting them at different distances apart to accommodate different thicknesses of leather,

and for maintaining their parallelism when thus adjusted.

13. The combination, with the crimping-jaws and their hinged ways, of independent hinged ways, and finishing-jaws sliding thereon, the said crimping-jaws and finishing-jaws being so connected that, while moving together up and down, the jaws of either set may move laterally apart independently of and without interference with the other set.

14. In combination with the finishing-jaws, jointed at their lower ends to their supportingbrackets, the devices herein described for connecting the upper ends of said jaws to their brackets, and the levers, whereby said devices may be operated to tilt the said jaws toward or away from each other, as desired, substantially as and for the purposes shown and set forth.

In testimony whereof I have hereunto signed my name this 10th day of June, A. D. 1875.-

S. W. JAMISON.

Witnesses:

B.. F. STONE, A. J. ROBINSON.

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