US192111A - Improvement in crimping-forms for boot-uppers - Google Patents

Description

J. B. CLAIR. CRIMPING-FORMS FORBOOIf-UPPERS.

No. 192,111. Patented June 19, 1877.

NPETERS, FHOTO-LITHQGRAFHER, WASHINGTON. D C.

UNITED, STATES PATENT OFFICE.

JOHN B. CLAIR, 0F OLDTOWN, MAINE, 'Assrenon OF ONE-HALF HIS RIGHT TO JAMES w. WALDRON, OF SAME PLACE.

IMPROVEMENT IN CRIMPING-FORMS FO R BOOT-UPPERS.

Specification forming part of Letters Patent No. l92 ,lll, dated June 19, 1877; application filed November 2, 1876. 1

To all. whom it may concern:

Be it known that I, JOHN B. CLAIR, of Oldtown, in-the county of Penobscot and State of Maine, have invented certain new and useful Improvements in Crimping-Form for the Uppers of Boots; and I do hereby declare that the following is a full, clear, and exact description thereof, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming apart of this specification, in which- Figure 1 shows a side view of my invention; Fig. 2, detail, showing clamp k.

The same letters show like parts.

The object of my invention is the production of a crimping-form for the uppers of boots, which shall do its work with less danger of wrinkling or tearing the leather, and with greater rapidity and certainty, than those now in use. I

My invention will be readily understood by reference to the accompanying drawings, in whicha shows a form of the ordinary shape, having a portion, b, at its back out out and attached by a'hinge. To this part b is attached a metal extension, 0, the whole form-- ing one jaw, d, of the machine. To the under side of the foot part of the form is attached a metal: guard, e, to which, at the toe end, is hinged a metal jaw, f, the two jaws d f meeting at and opening from the heel. These jaws. are grooved upon their inner sides, as is also the guard 0, so as to inclose an angle-iron, 9, through the 'angle of which passes a screw, h, into a bearing in the guard 0, so that by turning the screw the angleiron is forced outwardly, drawing with it the jaws df, which slide upon its inclined sides. At 13 z are springs secured to the stationary partof the form, and passing through slots j j in the jaws d f, respectively, and acting on said jaws in such a manner as to create a tendency to close. To the ends of these springs projecting through the slots, or to the jaws themselves, if preferred, are pivoted the clamps for holding the leather. These clamps are peculiar in construction, shutting over each side of the jaws d f, which are suitably roughened to hold the leather. The pivot upon which they turn is placed at the upper corner nearest the heel of the machine, causing the clamp toact as a cam. The upper part 1 of the angle-iron g is so formed as to act as the center or heel clamp in conjunction with a cap. It is rectangular in horizontal section, and is largest at the bottom, having its sides grooved or corrugated. Above this, on the screw, slides the cap m, roughened upon its inner surface, and .shutting down over the part l of the angle-iron, securing the leather between the roughened surfaces.

The operation of my machine is as follows: The bootfront taken from the breaker is placed over the form, an d the clamps k It turned down over the leather, pinching it between the jaws and the clamp. The heel part is also drawn into place over the partl of the angle-iron, and the clamp m pressed over it. The front is now secured in place, and, the screw it being turned, the angle-iron g is forced out,

opening the jaws and stretching the leather to the form. As the stretching proceeds the leather is drawn down into the angle a of the form, and also from the clamps la it toward the center clamp lm, the line of the greatest stretch being on the line a n, and decreasing on either side, causing a tendency to wrinkle.

This .is obviated by the method of attaching the clamps is k, which, operating as cams, give slightly as the stretching proceeds, holding the leather firmly, but not rigidly. This, moreover, greatly lessens the danger of tearing of the leather. This efiect of the clamps is increased if they are pivoted to the ends of the springs t 11, which give an elasticity to the fastening.

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

1. In a crimping-form for the uppers of boots, the combination of the form a, springjaws df, angle-iron g, screw h, and clamps l m and k is, all operating as set forth, for the purposes specified. y Y

2. In a crimping-form for the uppers of boots, substantially as herein described, the

.eccentrically pivoted leg and foot clamps k k,

as and for the purposes set forth. I

3. The springs i i, in combination with the leg and foot clamps k k eccentrically pivoted In testimony. thatl claim, the foregoing I thereto, as and for the purposes described. have hereunto set my hand this 30th day of 4. A crimping-form for the uppers of boots October, 1876'.

in which the leg and foot portions of said JOHN B. CLAIR.

front are retained in place on the form by elas- Witnesses:

tic fastenings, substantially as described, for JOHN R. MASON, I

the purposes specified. WM. FRANKLIN"'SEAVEY.

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