US58315A - Improved machine for cutting leather - Google Patents

Description

'UNITED STATESPATENT Onnien.

CALEB S. STEARNS, OF MARLBOROGII,MASSACHUSETTS.

IMPROVI-:D MAeHlNE Fon CUTTING LEATHER.

Specification forming part of Letters Patent No. 58.315, dated September 25, 1866.

To all whom it may concern:

Be it known that I, CALEB S. S'rEARNs, of Marlborough, in the county of Middlesex and State of Massachusetts, have invented an Improved Machine for Cutting Leather, Src., of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this speciiication, in which- Figure 1 is a perspective view of my improved machine for cutting leather. Fig. 2 is a side elevation of the saine. Fig. 3 is a section through the die and its shaft, on the line y y of Fig. 2.

Machines have been constructed for the purpose of cutting out soles of boots and shoes and other articles, in which the die was attached to the end of a vertical shaft, working up and down in stationary bearings. This necessitated the cutting of the hide into long strips, which were moved along under the die; but with this method a considerable waste of leather was occasioned, as the die was always brought down vertically in the same place, and could not be moved so as to cut in the eX- act spot required, and on this account the ordinary hand-die, which is struck with a mallet, is generally preferred.

My invention has for its object to overcome this objection,.and it consists in a machine in which the die is secured to a movableframe, and so arranged that it can be brought over and down onto any portion of the table in the required position to cut the leather Without unnecessary waste, the hide being spread out upon the table, and not cut into strips, as heretofore.

To enable others skilled in the art to understand and use my invention, I will proceed to describe the manner in which I have carried it out.

In the said drawings, A is the bed of the machine, from which rise the standards B C, the former of which supports the frame D.

E is a block, which is grooved on each side, and fitted to slide back and forth in the frame D, and to this block is secured a shaft, F, to which is att-ached, so that it will swing freely in. any direction, the frame G. This frame is jointed in the center at a, and its outer end y :is bifurcated, forming bearings b for a vertical hollow shaft, I-I, which slides up `and down, and is provided with a collar, c, between which and the lower bearing b it is surrounded by a spiral spring, d, by which it is retained in the position seen in Figs. l and 2, the collar c serving as a stop.

I is a collar, which is so attached to the lower end of the hollow shaft H that it will swivel round freely thereon, and to this collar I is secured, by means of a set-screw, e, the cutting-out die K, the spindle f of which passes up into the hollow shaft H, and on top of this spindle f rests a rod, g, of such a diameter that it will slide freely Within the hollow shaft. The die can thus be revolved around freely in any direction, as required.

I will now describe the manner in which the die K is brought down onto the leather or other material which is placed upon the table L.

M is a presser-block, the surfaceof which nearly corresponds to that of the table L, and from the ends of this block project the guides h, which slide up and down in` slots t' in the standards C. 4

N is a horizontal shaft which runs in4 bearings-in the standards C, and carries the driving-pul1ey O, and at each end, outside the bearings, a disk, l?, from which projects a crank-pin, j, which is connected with the guide h by means of a rod, 7c, and thus, as the shaft N is revolved, the presser-block M is carried down, so as to strike the top of the rod g and press the die through the leather or other material on the table, the area of the under surface of the presser-block being such that it will strike the rod g whenever the whole of the die is over the table'L.

It will be seen that the pressure of the rod g is exerted directly over the center of the die, thus avoiding all liability of straining theswivcling-collar I. The length of the rod g may be varied to correspond to the length of the spindle of the die employed, and thus insure the die being vbrought down sufficiently-to cut through the material on the table L.

When the presser-block M is raised the y spring d draws` up the die K,and retains it above the leather, so that the operator, by taking hold ot' the swinging frame G, can move the die at pleasure over any portion of the hide, and bring it down into the exact position required to cut Without unnecessary Waste.

Instead of the sWiveling-die being attached to a swinging frame, it may be secured to a frame so arranged as to slide in different directions to bring the die over any portion of the table required, Without departing from the spirit of my invention. In the machine above described, the die K is for cutting out the soles of boots and shoes, but dies of other forms for cutting out various articles may be used instead.

It will be seen that with the above-described machine the leather or other material canv be portion of the table L, in combination with the presser-bloek M, or equivalent device for pressing it down, substantially as set forth.

2. The hollow shaft H, with its swivelingcollar I, in combination with the die K and the rod g, substantially as described.

CALEB S. STEARNS.

Witnesses: i

P. E. TnsoHEMAcHER, W. J. CAMBRIDGE.

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