US402860A - Machine for stretching leather - Google Patents

Description

(No Model.) 2 Sheets-Sheet '1. G. L. ROYER. MACHINE FOR STRETGHING LEATHER.

nted May 7, 1889.

' (No Model.) 2. SheetsSheet 2.

G. L. ROYER. MACHINE FOR STRETGHING LEATHER.

Patented May 7, 1889.

m NA.. I v 0 O FW: 9 Q w w o o M p m. ufluwnmwnlmfl M II IH W I -H H 1W3; 1| a E 5% Lg -edge, as shown in Fig. 3.

NITE-D STATES CHARLES LOUIS ROYER,

PATENT OFFICE.

OF HALIFAX, ENGLAND.

MACHINE FOR STRETCHING LEATH ER.

SPECIFICATION forming part of Letters Patent No,402,860, dated May 7, 1889.

Application filed November 12, 1888- Serial No. 290,654. (No model.) I

To all whom. it may concern.-

Be it known that 1, CHARLES LOUIS ROYER, a citizen of the United States, but now residing at Halifax, England, have invented a new and useful Improvement in Machines for Stretching Leather, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of the specification.

Leather-stretchin g has heretofore been done by a machine which resembles this in many respects, but which differs from it in the fact that it has not so conveniently-arranged and efficient a table or so conveniently-arranged and efficient a beam, and has but one tensionknife.

In the drawings, Figure l is a vertical section of a machine embodying my improvement. Fig. 2 is a front elevation of the same Fig. 3 is a plan of the table of such a machine, and Fig. 4 is a section of the beam and tension-knives upon a large scale.

A is the frame of the machine, and B is the table.- This table is formed with a curved A swinging arm, 0, is pivoted to the frame of the machine, as shown in Fig. 1, and is provided at its upper extremity with a blunt knife-edge, c, of a similar contour to the curvature at the edge of the table. This knife-edge is a little below the plane of the upper surface of the table B, and the edge of the table may be formed, if desired, with a notch, into which the knife-edge fits, as shown at b of Fig. 1.

D is the leather intended to be stretched.

E is the tension-wheel. Upon its shaft 6 is a clamping device for fastening the edge of the leather to be stretched to the shaft. This may be of any usual form. A treadle, O, pivoted to the frame of the machine, engages the power end of the swinging arm 0, and by its depression brings up the knife-edge c to a proper position to put a strain upon the leather. There is a beam, F, which extends across the machine from side to side, and which is liftedinto place by the lever G, which is armed with an eccentric upon its inner end. In the construction of the machine two of these levers G are usedone at each end of the beam Fin order that either end may be raised a little higher than the other end, to compensate in work for the inequalities of the leather.

On the head of the machine, on each side, are boxes H, in which are mounted the journals of a shaft, I. This shaft I carries upon one side two knives, 2 and it, one of which, 1', projects in the vicinity of an inch farther from the shaft than the other, It. In the beam F, at the part opposite the knife 2', is a groove, f, which is somewhat wider than the knife 71, and increased by twice the thickness of the leather to be stretched. The distance between the knives t' and k is such that while the knife'i is capable of entering the groove f the knife is will impinge upon the upper surface of the beam F.

The piece of leather to be stretched, being placed in this machine and one of its ends engaged with the shaft 6 of the wheel E, is led across the table of the machine and its outer end dropped down between the swinging arms 0, which carry the knife-edge o. The

treadle 0 being then depressed and the levers G raised and the wheel E revolved toward the operator, the leather will be forcibly drawn toward the operator, and will be held back in its movement by the tension brought to bear upon it by the engagement between the knife-edge c and the edge of the table B. As this table is convex from the operator and the knife-edge c is concave toward the operator, the leather will be stretched, or smoothed, or ironed from side to side, as well as stretched endwise, and the wrinkles smoothed out. In its passage across the machine the leather first encounters the round-edged knife is, which presses upon the leather and presses it against the upper surface of the beam F, while the knife *6 presses a bight of the leather into the groove f of the beam F, bringing tension upon it over the edges of this groove and under the rounded lower surface of the knife 2 For the purposes of adjustment, a handle, J, is applied to the shaft I, so that it can be swung in and out of position, as may be desired, and a stop, 8, is provided on the frame of the machine, in which is inserted a setscrew, 5', by which the swing of the shaft I toward the operator on its lower side may be limited and the knives t is adjusted in proper working position. Another stop, 8 limits the throw of this shaft in the opposite direc tion.

The combination of a lifting grooved beam with a single knife adapted to press the leather into a groove is not new; but the additional knife, k, adapted to press and smooth the leather against the upper surface of the beam before it is drawn over the edges of the groove f and under the knife 1', has not, so far as I am aware, hitherto been made. The formation of the table B, with its convex edge, and the combination therewith of the concaved knife-edge c is, I believe, also new.

I claim as my invention and desire to secure by Letters Patent- 1. In a leather-stretchin g machine, the combination of the drawing mechanism with the table .13, convex from the operator upon its outer edge, with the knife-edge c, concave toward the operator upon its edge and adapted to engage with the leather, D, below the surface of the table B and put the same in tension, substantially as and for the purpose described.

2. The combination of the adjustable beam F, provided with the groove f, and the roundedged knives 70, placed above said beam, one of which, i,is adjusted to press the leather into the groove f, and the other of which, 76, is adjusted to press the leather upon the upper surface of the beam F, substantially as and for the purpose described.

CHARLES LOUIS ROYER.

\Vitnesses:

TI-IOS. WM. CLARKE, J. M. 1)OL|A-N.

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