US287813A - Skiving-machine - Google Patents

Description

(No Model.)

W. S. FITZGERALD.

SKIVING MACHINE.

Patented Nov. 6, 1883.

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UNITED gSTATES PATENT OFFICE.

IWALTER s. FITZGERALD, oF EoSToN, MASSACHUSETTS.

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SPECIFICATION forming eert of Letters Patent No. 287,813, dated November e, i883.

A vApplication filed July 25, 1883. (No model.) d

` provement in Skiving-Machines, of which the following is a full, clear, andfexact description, reference being had to Vthe accompanying drawings, making part of this specification, in which- Io Figure l is auelevation of the front side of a skiving-machine having my improvement applied thereto. Fig. 2 is a Sectional elevation of a portion of the same. Fig. 3 is a sectional plan. Fig. 4 is a section on the line x I5 of Fig. 3. f Fig. 5 is an elevation of a portion of the rear side of the machine:

lMy present invention has special reference to the relative location andv position which\the cutting-knife bears to the rotating table upon 2o which the stock to be cut is fed; and this in-l vention consists in placing the skiving-knife at the right of the rotating table and slightly to the rear of the vertical plane passing through the axis of the feed-roll, by which arrange- 25 ment of the knife the leather, leather-board,

Snc., iscut evenly and uniformly, as required, while the tendency of the creasing or wrinkling of the material is entirely overcome.

To enable others skilled in the art to under- 3o stand and use my invention,- I will proceed to describe the manner in which I have carried it out.

In thesaid drawings, A represents theframe, in suitable bearings, ct b, in which revolves the 3 5 horizontal driving-shaft c, carrying a drivingwheel, B, at one end and aserrated or toothed feed-roll, d, at its other end. rIhis feed-rollis capable of vertical adjustment by operating a screw, C, which actsupon a spiral spring, e,

4o interposed between its bottom and the bearing a of the driving-shaft thereunder, saidshaft being free to rock on its bearing b, and its downward movement being limited by a stop, h.,

D is a circular table secured to the top of a 4 5 J vertical shaft, i, having its bearings in a block,

Aj', capable of being laterally adj usted, and secured on the frame A by means of a slot, t", and clamping-screw s, the vertical adjustment of the table being effected by operating the screw, k at the bottom of the shaft t', the material to be skived being fed upon the table, which is caused-to revolve by the friction of the same thereon while being guided forward by the feed-roll. l

Z is a Spring presser-rod pivoted at m tothe frame, the lowe end of the rod being brought to bear on the materialwhen convex or outwardly-curved surfaces are being cut, and as this rod hasl but a slight bearing on the stock, the facility of turning the, same at* sharp angles while being fed is thereby increased.

Within a recess, termed a y throat,77 n, formed in the adjustable block A', is located a skiving-knife, E, the bottom ofthe throat being inclined and situated to the right of the table, and slightly tofthe rear of a vertical plane passing through the axis of the feedroll d, the top of the inclined throat extending nearly to the under .side of said table. The knife suitable for the particular description of stockto be cut is held in the proper position and at the required inclination by clamping a plate, F, against the sideV of the shank or knife stock by tightening the screw t, an upward angle, Fig. 2, Aof about thirtyve degrees with the horizontal plane being preferred when the material to be cut is thin, and having a direction downward toward the table when thick material is to be cut. G is an adjustable gage, against which the edge of the material bears as it is carried by the feed-roll to the knife. This gage is set more or less over the table, according to the amount of the edge to be removed. The adjustable block A is moved, with the knife, table, and gage, horizontally inV either direction to Suit the required bevel-to be given the edge of the stock. For instance, when the edgejof a thin piece of material is to be acted on, I move the adjustable block to the right, thus bringing the right-hand portion of the periphery of the table nearer the driving-wheel B, after which I adjust the knife to its exact relativel position with respect to the table, and secure it by the clamping-plate F, and, finally, I adjust the edge-gage G. For thick stock I move the block A in the opposite difeed-roll d, and a gage, the adjustable block 1o reotion, then adj usb the knife and edge-gage A,\vitl1 its throat; n and knife E,1ooai;ed there independently of each other. in, as described, for tliepurpose set forth. v 'llle'severelv portions of the machine, with 'Witness my hand this 13th day of July,l883., 5 the exception of the knife '-throat n and the v v f 4 4 location of the knife, being Well lnown7 they XVALTDR S' FITZGERALD v f y are notv particularly described herein. lIn presence of l claim- N. W. STEARNS,

In combination with the rotating table D, i J As. TV. CHAPMAN.

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