US323114A - Saw-gummer - Google Patents

Description

(No Model.)

' J. B. GLOPTON.

SAW G'UMMER.

,114. Patented July 28,-1885.

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JOHN BENJAMIN OLOPTON, OF BASTROP, TEXAS.

'SAW-GUMMER.

SPECIFICATION forming part of Letters Patent No. 323,114, dated July 28, 1885.

Application filed J one 23, 1884.

T0 0% whom it may concern.-

Beit known that I, JOHN BENJAMIN GLoP TON, of Bastrop, in the county of Bastrop and State of Texas, have invented certain new and useful Improvements in Saw Gummers, of which the following is a specification.

My invention relates to saw-gummers, and is designed as an improvement upon the machine for which Letters Patent were granted to me bearing date March 1, 1881, and numbered 238,352, though the improvement can be applied also to other machines or implements of like character.

The invention consists in a bit and die or dies of novel form, as hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a perspective view of a saw-gummer provided with my improved bit and dies; Fig. 2, a perspective view of the bit; Fig. 3, a face view, and Fig. 4 an edge view, of the same; Figs. 5 and 6, respectively, views of the dies; Fig. 7, a face or edge view of one of the dies, and Fig. 8 a view illustrating the action of the bit and dies.

The purpose of my invention is to improve the action and prolong the usefulness of the bit and dies, and to prevent the clippings from interfering with the operation of the machine.

The improvements are here illustrated as applied to the machine previously patented to me, as above mentioned, but may be embodied in any similar machine with equal advantage.

Referring again to the drawings, and particularly to Fig. 1, A indicates the base or frame of the machine, slotted to receive the saw; B, a bar pivoted to its side and carrying the guide-shoe O, which bar and guide together keep the machine in the plane of the saw.

D is the bar which carries the weight required to hold the machine against the action of the feed, which is represented as of the same construction as that shown in my former patent.

E indicates the swinging bar, which rests upon and is pivoted to the upper face of the base of frame A of the implement, and is formed with a rabbeted or grooved projection, F, to receive the cutting-bit G, which is held in place by set-screw H passing through the front of projection F. The bit G acts in con- (No model.)

junction with dies I I, set in a recess in the base block or frame A at one side of its slot, the bit-carrying arm being moved across said slot by means of a lever, M, and a gage, J, being provided to regulate the cut of the bit, as before.

These parts are shown and referred to merely for the purpose of making clear the construction and mode of operation of the improved bit G and dies I I, to which the present invention relates, and all parts not particularly mentioned or described may be of the construction shown and described in my aforesaid patent, or of such construction as may be preferred.

Referring now to Figs. 2 to 8, inclusive, G

indicates the cutting bit, which is doubleended and reversible, and therefore capable of extended use without resharpening. The bit consists of a flat steel bar or block of suitable length,width, and thickness, having a beveled face, a, at each end upon opposite sides. These beveled faces a extend'across the'entire width of the bit, with the exception of a narrow rib or portion, 1), which is left the full thickness of the bit, and serves as a bearingface for the bit-holder. The edge of the bit opposite the rib or portion b is likewise beveled, reducing the width of the bit at each end, as more fully shown in Fig. 3, and forming an inclined cutting-face,c, the edges of which act, in conjunction with the edges of dies I I, in the same manner as the bladesof shears. This bit is clamped in the projection F of bar E by set-screw II, as shown in Fig. 1, its cuttingface 0 being turned toward the slot of baseblock A, and so adjusted with reference to gage J and dies I I as to make any out required.

The die I is of the form shown in Fig. 5- that is to say, it is a tapered block of dovetail form in cr0ss-section, and is formed with a forwardly-projecting upper corner, (I, and inclined cutting-edge c, with which the cutting face'c of bit G coacts, as illustrated in Fig. 8, the forward or outer point of the die and base of cutting-face 0 coming first together, and said face passing the cutting-edge e gradually from point d downward, in the same manner as the blades of shears pass one another, thus giving a gradual clean and powerful cut with the application of far less. power than is required where the cut is made simultaneously from end to end.

The die I consists of a rectangular shank, f, having an A-shaped upper end, with a slight ledge or shoulder, g, at the side, which abuts against die I, and with an overhanging shoulder, h, at theopposite side to rest upon the base-bloclc A and support the die in place. The head or upper end of the die I is widened, as shown in Figs. 6 and 7, to form an inclined face, t, the corner of which forms a cuttingedge to coact with a corner or edge of face a of the bit G, in the same manner as the other corner or edge of said face coacts with cuttingedge e of die I, and as illustrated in Fig. 8.

In practice it is found that the clippings frequently cling to the cutter or bit, and being carried back thereby fall between the bit vand the teeth of the saw, preventing a proper action of the bit, impeding the movement of the parts, and often bending or breaking the teeth of the saw. To obviate this difficulty I form upon the opposing faces j and 7c of the dies I and I, over which the clippings are carried by the bit, teeth or barbs Z, which serve to hold the clippings and prevent them from being carried back by or with the bit or cutter. These teeth or barbs may be formed by means of a chisel or other cutting-tool, or in any other convenient manner, and of the same form, essentially, as the teeth of a file or rasp.

The bit and dies being thus constructed, the bit is clamped in place by set-screw H. The die I has its shank f inserted in the opening made for it in block A, and the die I is driven in by the side of it, the taper of the die I serving to wedge and hold both securely in place, and when the parts are thus applied the machine is operated in the usual manner.

When the bit becomes worn or dull, it is simply released and turned end for end, presenting a new cutting-face, and thus doubling the time of its use without resharpening.

If desired, the beveled faces a of the bit G may be made on the same side instead of on 5 opposite sides, as in the drawings.

Having thus described my invention,what I claim is- 1. A die for saw-gumming implements, having a shank, f, anA-shaped upper end, a ledge, g, at one side, and a shoulder, h, at the opposite side, to rest upon the frame of the implement.

2. A die for use in saw-gumming implements, having barbs or teeth to remove clippings from the cutter, substantially as explained.

3. A die for saw-gummers, having its cuttingedge inclined forward at the outer end, substantially as and for the purpose set forth.

4. A reversible bit or cutter for saw-gum- 6o mers, having one side face at each end beveled to conform to the required form or inclination of the tooth of the saw.

5. A bit orcutter for saw-gummers, having its cutting-face beveled, substantiallyas shown, whereby it is caused to cut from its base to its point, as explained.

6. The herein-described bit or cutter for use in a saw-glimmer, consisting of a body having beveled face a, rib b, and inclined cuttingface 0.

JOHN BENJAMIN OLOPTON.

Witnesses:

A. O. ERHARD, ISAAC S. LEWIS.

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