US176919A - Improvement in leather-skiving machines - Google Patents

Description

Boston, of the county of Suffolk and State of v whichbed B, the knife or cutteI U, and the yielding presser D.

.shoulder, a, to support a ring, F, which enand is provided with a clamp-screw, b, to

ism with thetop of the ring. In front of the {top of the edge-rest.

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' IMPROVEMENT m LEATHE'R-SKIVINGMACHINES.

Specification forming part of Letters Patent No. 176,919, dated May 2, 1876;

j April 13, 1876.

application filed To all whom it may concern:

Be it known that we, TYLER ANDREWS, of

Massachusetts, and STEPHEN MOORE, of Sudbury,-of the county of Middlesex, -of the said State, have invented a new and useful Machine for Skiving Shoe-Uppers, or various other articles of leather or other material;. and do hereby declare the same to be fully described in the following specification and represented-in the accompanying drawings, of

Figurefl is a top View, Fig. 2 a front eleva-v tion, and Fig. 3a transverse section, of the said machine.

. The principal constituents of the machine are the curved edge-bearing A, the slanting In the drawings, E denotes a standard, having projected from its upper end a cylindrical journal, constituting the curved edge-bearing A, there being at the base of said journal a compasses the part A, turns freely thereon,

clamp it thereto. The upper surface of the said ring, which constitutes the bed B, is inclined both transverselyan'd longitudir'ially, there being one or'more longitudinal inclinations to it. It descends or declines from the edge-bearing in radial directions.

0n the top of the projection-A,and so as to extend obliquely across the upper edge of the bed-ring F, there is fixed the knife 0, whose cutting-edge is horizontal, or not in parallelknife is an elastic yielding presser, D, shaped as shown in the drawings, it being secured in place by screws h h, going through it into the By revolving the ring F. on its supports more or less,'we can vary the distance of the edge of the knife from the part of the ring immediately beneath it, and thus vary the thickness of the scarf orpart to be removed from a piece of leather to effect the scarfing of it.

Or, in other words, we can adjust the machine to the scarfing of a piece of leather, whatever may be its thickness, between limits'incident to the machine, having the bevel thicker or thinner at the edge, as circumstances may require. I

'lo scarf a piece of leather or material, it is to be placed in the upper surface of the bedring, and with .its edge against the periphery of the edge-bearing A, and it is to be drawn forward under the knife and presser. The

material, on being pulled against the knife and along underneath it, will be held down upon the bed by the presser and be scar'fed by the knife, the presser yielding or moving up or down as the material may vary in its thickness at the'ed'ge to bebeveled'.

The knife, by ranging obliquely across the upper surface of the bed-ring, so as to have its cutting-elge make an acute angle with the periphery of the edge-beari11g,will not only cut with a drawing stroke, but operate to force or keep the material into close contact with the edge-bearing. 7

The knife-edge and the presser may be at right angles to the edge-bearing; but under such circumstances they will not operate to so good advantage, as the knife'will not cut with a drawing stroke, nor force the material up to the edge-bearing. I

The object of making the edge-bearing curved or .cylindrical is to enable concave curved edges of leather to be skived or scarfed to advantage.

The bed B may slant transversely only, and be immovable, withreference to the edgebea'ring'and knife; but it will be evident that with such a construction the machine would be very limited in its use, comparatively speaking, as in all cases it would reduce the leather to one thickness at its edge; whereas, 7

. We'claim as our invention as follows:

1. The combination of the knife 0, the yield- 2 l l76,9l9

ing' presser D, the edge-rest A, anda bed in and applied substantially in manner and to clined in one direction on its top to the edge operate as and for the purpose or purposes as of the knife, as set forth, all being arranged set forth.

substantially as specified.

2. The combination of the knife 0, the yield'- ing presser D, the curved or cylindrical edgebearing A, and the adjustable bed-ring F, Witnesses: slanted transversely and longitudinally on its R. H. EDDY, upper edge, all being constructed, arranged, R. SNOW.

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