US100082A - Improved leather-splitting machine - Google Patents

Description

aient @ritira OALEB S. STEARNS, 'OF MARLBOROUGH, MASSACHUSETTS.

Letters Patent No. 100,082, elated Feb/mary 22, 1870; mtedatetl February' 12,1870.

IMPROVEID LEATHER-SPLITTING- MACHINE.

The Schedule referred to in these Letters Patent and making part of the same To all whom it may concern Be it known that I, GALEBS. STEARNS, of Marli borough, in the county of Middlesex, and State of Massachusetts,-have invented an Improved Machine for Splitting Leather, 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.

Figure 2 is a transverse section through the center of the same.

Figure 3 is a perspective view of the brake with its roll.

In machines for splitting leather of the old construction a difficulty was experienced from the wrinkling or doubling up of the leather as it was pushed by the rolls against the knife, causing the leather to be cnt of an unequal thickness, to remedy which objection a machine was constructed with a carrying cylinder provided with mechanism for grasping the end of the leather, as set forth in Letters Patent of the United States granted to me on'the ninth (9th) day of February, A. D. 1864.

With the construction as described in the aforesaid Letters Patent that portion, however, of the leather held by the grasping mechanism was wasted.

To construct a machine. in which this waste and valso the wrinkling or doubling up of the leather is thus preventing the above mentioned wrinkling ofthe leather as it is pushed against the knife and entirely avoiding the .waste incident to the grasping mechanism.

lo 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 drawingsl A is the frame-work of the machine.

B is the carrying-cylinder, the surface of which is milled or roughened so as t0 prevent the leather from slipping thereon, and thus insure its being carried forward as required.

The journals a of the cylinder B revolve in bearings b, which slide in slotsc in the frame-work, and are -pressed upward therein by means of spiral springs (l.

C is the splitting-knife, which is secured by means of screws c to a longitudinal bar, D, the under side of which is cut away, as seen in lig. 2,'so as to afford a throat or passage, h, for the delivery of they split or waste.

E is a brake which extends ylongitudinally across the top of the carrying-cylinder B, and is provided atits outer ends with guide-blocks g, which slide vertically in slots f in the upper portion of the frame-work, the brake being ,presseddown toward the cylinder by means of spiral springs t, whilethe amount of its upp ward motion is regulated by the thumb-screws G, which .thus serve to gauge the thickness to bev given to the leather when split.

The under side of the brake is made concave, so asv to fit the cylinder B, and smooth to allow the leather to slide freely under it until delivered by the revolution of the ronghened cylinder B close up to the edge' of the knife C, the concave surface of the brake projecting up to the edge of the knife to prevent the leather from wrinkling or doubling up on its passage thereto.

Near the outer portion of the brake E is formed a circular longitudinal recess, lc, for tlie'reception of and forming a bearing for a small roll, H, at one end of so as to allow the brake to be' pressed np until arrested by the gauge-screws G, bibre the cylinder B can be depressed, and thus, when the leather is entered between the roll H and cylinder B and carried under the brake E, the latter is first raised until the guide-blocks g comeA into contact withthe screws G, after which the cylinder B is depressed so as to allow the split or waste leather to pass under the knife C and out of the machine. i

The grain is thus cut of uniform thickness throughout, and any unevenness caused by the varying thickness of the leather is thrown into the split. 1n case, however, a portion of the leather'shonld be of a thickness less than that required for the grain, the cylinder B will not be depressed, as the brake E will not be raised sufficiently to come into contact with the gaugescrews G, and consequently the thin portion of the leather will pass over the knife without being split, the springdorake forcing the leather without regard to its thickness at all times firmly down upon' the cylinder, and the leather is thus held securely in its proper position until delivered to the edge of the knife, and entirely prevented from wrinkling or doubling up while being carried forward thereto.

The above-described machine has few parts, is of simple construction, and not liable to become disarranged, while it will perform its work iu a. thorough and superior manuel'.

Claim,

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

'lhe yielding brake E with its concave under sur face, in combination with the carrying-cylinder B and the knife C, the brake being so arranged. as to hold the leather in position until delivered to the-edge of the knife,lsubstantially in the manner and for the purpose set forth.

Also, the roll H, in combumtiomwith the yielding brake E and the carrying-cylinder B, substantially `as and for the purpose described.

Also, the springs 'i el, in combination with the brake E and cylinder B, `when the springs are so constructed and arranged that the brake will yield until arrested i by the gauge-screws, before the ycylinder can be depressed, substantially as and for the purpose set forth.

CALEB S. STEARNS. Witnesses E. R. ALLEY, AMos CUTTER.

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