US139717A - Improvement in machines for crimping leather for boots and shoes - Google Patents

Description

V s. w.`1AM|soN. 5 Machines for Crimping Leather for Boots andShoes, No. 139,717. Pa1en1ed1une10`,`1373."

2 Shexts-"Sheet 2.

` s. wQiAMlsoN. i A Machines for Crimping Leather for Boots. and Shoes."` N0. 139,717. l Patentediunei04i873. i

Uivrrnn STATES PATENT, Oer@ SAMUEL WV. JAMISON, OF NEWARK, NEW JERSEY, ASSIGNOR T0 HIMSELF AND WILLIAM J. DUDLEY, OF SAME PLACE.

IMPROVEMENT IN MACHINES FOR CRIMPING LEATHER FOR BOOTS AND SHOES.

Specification forming part of Letters Patent No. 139,717, dated June 10, 1873; application fihd May 20, 1873.

To all whom it may concern:

Be it known that l, SAMUEL W. JAMIsoN, of Newark, Essex county, New Jersey, have invented certain new and useful Improvements in Machines for Crimping Leather for Boots and Shoes, and for Crimping other Materials, of which the following is a specifica-tion:

My invention principally relates to crimping-machines of the kind for which Letters Patent of the United States were granted to me May 7, 1867, No. 64,538, and February 15, 1870, No. 99,906.

The machine in which my present invention is embodied in the main resembles the machine shown and described in the patent last above named, the differences consisting, first, in the 4 construction of the crimping-jaws, and second,

in the addition ot'inishing-jaws which follow the crimpingjaws to press andsmooth out the wrinkles from the material acted on by the crimping-jaws.

`The nature of my invention, and the manner in which the same is or may be carried into eit'ect, will be readily understood by reference to the accompanying drawings, in which- Figure 1 is a front view, in perspective, of a machine made in accordance with my invention. Fig. 2 is a rear elevation ofthe same. Fig. 3 is a view of one of the crimping-jaws detached. Fig. 4 is a transverse vertical central section ot' one of the finishing-jaws and one of the 'crmpingjawa together wit-h their adjusting mechanism. Fig. 5 is a view of one of the finishing-jaws.

The hinged and laterally-adjustable ways i K, for the crimping-jaws, and the Weights 15,

and rods and levers 12 13 14 16, for drawing said ways toward each other, are arranged and operate in the manner described in section III of the specih'cation of my patent No. 99,906, above referred to. So also my present machine contains the` same arrangement of the system of levers 17 1.8 19, connecting-rod 20, and treadle 21, as described in section IV of the specification of said patent. The adjusting mechanism of the-crimpingjaws D I) is constructed and combined with said jaws in the manner described in section II of the specification-of said patent. `The gearing for imparting an up-anddown movement to the jaws 1s also constructed and arranged as described in section I of the specification of said patent, with the exception that I nowdispense i i with the two different-sized gears, by means' of which, in the patented machine, the jaws were moved upward at a greater speed than they were moved downward; and in lieu thereof I use a sm gle intermediate gear, by means of which the jaws a-re caused to ,travel at the same rate ot speed up and down. This I am enabled now to do by reason of the peculiar" construction, hereinafter described," of` the crimping-jaws, which renders unnecessary the slow downward movement ofthe jaws required under the old construction in order to avoid tearing or injuring the leather. The` tripping devices and clutch are also constructed and i arranged 1n the manner described in the afore-` said patent.

Further reference to the above recited mechanisms will not, therefore, be necessary, and I shall confine myself to a descriptionof those devices in which my present invention is found.

There are two crimping-jaws, D, designed to pass down on `opposite sides of the tree or form N. By the action of 4these jaws the leatheron the tree is crimped into shape.`

Each jaw being a counterpart of the other, a" y description ot' one will answer for both.

I now dispense with the clamp-piece which,

in the machine described in patent 99,906, was l i located in the lower part or heel ofthe jaw, A

the leather, when first acted "on, willhugfthe point only of the jaw without" clinging tothe" beveled sides. In the machine as heretofore made the lower part of' the jaw was simply rounded, its edge being at all parts perpendicular, or substantially so, to the side ot.' the tree. The consequence was that the leather,

when first pressed down by thejaw, would hug and cling to the lower edge ofthejaw throughout the whole or nearly the extent of the same. Inthisway theleather would beforced orspread away from the heel instead of bein g drawn or concentrated toward it, as it should be, in order to produce a properly-crimped 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 projectingbeak 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 whenY the jaw reaches the tree and first acts on the leather, and the beveled parts b on each side thereof eectually prevent the clinging or hugging of the leather at those points. The interior face of the jaw is formed with a series of central, upwardly-curved corrugations, c, which have the effect of crowding or concentrating the leather toward the heel of the boot front as the jaw descends, in this respect dii'ering 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 ot' this formation ofthe corrugations is, as above intimated, to crowd or concentrate the stock toward the heel of the crimped front, where the leather must be most drawn out, where the greatest strain comes, and where the most material is needed. Were the central corrugations downwardly curved they would have exactly an opposite eiect, and would tend to spread the material away from the point where it is not required. The toe portion cl and leg portion c ofthe jaw are also provided with corrngations; 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 iinished and crimped front. The proportional dimensions of the part with upwardly-curved central corrugations, and theV toe and leg portions, are such that the said central corrugated part will have traversed only about one-half of the boot front 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 thejaw will have completed its downward movement. In this way the Yfinal strain upon the crimped Yfront is given by the upwardly-curved central corrugations at a point where that strainis most needed, viz.,` the heel, and at a time when sufficient leather has been crowded into the heelfto allow it to be fully stretched and brought to a point without danger of rupturing the front or tearing out the corner.

vIt will be obvious that the toe and leg corrugations might be dispensed with, inasmuch as the edges d e would act on the leather to a great extent like the corrugations. It is alsoto be remarked that the upwardly-curved central corrugations may be only in the upper half of the jaw, or thereabout, 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.

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

I combine with crimping-jaws a second set of jaws, which are smooth-faced, and move up and down with the crimping-jaws, following the latter in their descent so as to act on the crimped front as it leaves the crimping-jaws, smoothing and taking all wrinkles out of the material. These jaws I 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 g, which may be considered to constitute the nishing-jaw proper, has its lower edge q1 shaped to t exactly the upper edge of the tree, so that the jaw in its descent will come in contact with the tree simultaneously throughout its length. The jaw g is fastened rigidly to its backing j' at the center g2; but its ends are free, so that they may be set out more or less from the backing by means of screws 7L, 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 objectof which is to adapt the jaw to the varying thickness of the boot-front operated on 5 said front, when it leaves the crimping-jaws having usually more thickness in the middle than toward the two ends. The finishing-jaws are preferably arranged above the crimpingjaws at such distance, as shown, that they will take hold of the crimped front before it is entirely released by the crimping-jaws.

The two nishing-jaws are adjusted toward and away from each other by mechanism but slightly differing from that employed for the same purpose with the crimping-jaws. Each jaw is jointed at its lower end by a horizontal hinge, if, to an arm, t', on a vertical plate, F, mounted on a spindle, l, on which it is capable of an oscillating movement. This oscilla-Y tion is `controlled by aI set-screw, k, passing through a curved slot in the plate F into the stationary plate G iixed 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 l, and having on its rear face a double helical cam, which lits a corresponding cam surface on the face of the bracket I, these parts being similar to those employed for the same puipose with the crimping-jaws. The head ofthe spindle l is heldin the brackeuand its screwthreaded end projects beyond plate F, and is `provided with a nut, by means of which the parts, when adjusted, can be tightly clamped together. The upper end of the jaw is connected with bracket I by means of a plate, m, held. adjnstably to the jaw by a screw, n, passing through a slot in the plate m, the latter being connected with a jointed head, Yo, on the bracket by means of a divided right-and-left screw-threaded rod, p, having its two contiguous ends united by a correspondingly-screwthreaded couplin g-sleeve, 1^, by means of which the working length of the rod p can be increased or decreased at pleasure. When the parts p and o are pressed down so as to be in line,the jaw will be held rigidly and prevent-4 ed from giving back; but by breaking or elevating the joint between them, as shown on the left in Fig. 2, the jaw will be tilted back on its lower joint or axis i. According to the working length of the rod p, the upper end of the jaw, when the parts p and o are in line, will be forced out more or less, this depending upon the adjustment of the lower part of the jaw l, effected 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 setscrews n and k. By loosening these screws E and the nut on spindle l, the jaws can be set at any desired angle. The tilting of the finishing -jaws on their axes i is effected by mea-ns of bent levers o, one for each jaw, riveted to brackets I or arms c extending therefrom, and formed with slots in their shorter arms, through which pass pins projecting from arms o on the parts 0. By taking either lever by the handle and vibratin git up or down, the jaw will be correspondingly tilted forward or back, as seen in Figs. l and 2. The brackets I of the rnishing-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 crimping -jaw ways, as fully shown in the drawings, and therefore requiring no further description. The brackets I are provided 'with horizontal splines s, fitted in grooves inl the brackets of the crimpingjaws, so that each set of jaws may be free to move apart independently of the other, to couform to different thicknesses of leather, while at the same time they must both move together up and down. .I connect, in this instance, the cross-head B with the jawsby means of jointed rods t, extending from the lower ends of the brackets of the crimpingjaws to the cross-head. v The ends of the latter extend through between the" hinged ways of the two sets of jaws,`and work up and down in xed or stationary guides L.

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

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

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

l. The crimping-jaws, 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 lirst acted on shall hug the beaks or points only of the jaws without y 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 orwithout toe and leg corrugations, substantially as hereinshown 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, ,y it will have traversed only about one-half the4 boot or 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 crimping boot and shoe fronts, the combination of the central upwardly-curved corrugations with toe and leg corrugations, formed y substantially as shown and described. so as to divert from the heel or lower point of the front the material y on each side of said central corrugations, for the purposes set forth.

6. 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 lat-ter set of jaws, substantially as shown and described.

7. The finishing-jaws having such a contour as to tit 0r 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 Yhold of the crimped front before it is entirely released by the crimping-jaws, substantially as shown and set forth.

8. The iinishingjaws formed substantially as described, with toe and leg portions, which may be adjusted or set .out more or less to conform to irregularities in the thickness of the crimped front.

, 9. In combination with the crimping-jaws and finishing-jaws, the hinged independent ways upon which said sets of jaws respectively slide, and the independent and separate systems of levers, connecting-rods, and weights, for drawing together said ways, substantially as shown and` described.

10. The co1nbination,with the finishing-jaws, of mechanism, substantially as described, for

jointed atY their lower ends to their supporting brackets, 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 vas desired, substantially as and for the purposes shown and set forth. i

In testimony whereof I have signed my Vname to this specification before two subscribing witnesses.

S. NV. JAMISON.

Witnesses:

M. BAiLEY, EDM. F. BROWN.

Images