US85329A - Charles h - Google Patents

Description

CHARLESIL REID, OF DANBURY, CONNECTICUT.

Letters Patent No. 85,329, dated December 29, 1868.

IIVIPROVED TOOL-HOLDER.

To all whom it may concern:

. Be it known that I, CHARLES H. REID, of Danbury, in the county of Fairfield, and State of Connecticut, have invented a new and improved Tool-Holder; vand l do hereby declare that the following is a full, clear,

-and exact description thereof, whichwill enable those skilledin the artlto make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a side View of my invention.

Figure 2 is a similar view of the same, inverted and reversed, and with a portion of the stock or holder broken away, to exhibit Ithe boring-tool and its gib and clamp-screw.

Figure 3 is a section through a; x, fig. l.

Figure 4 is a section through y' y, iig. 2.

Similar letters of reference indicate 'corresponding parts.

The object of this invention is to provide a simple, convenient, and effective stock or tool-holder for machinists use, and which is available. both as a tool# holder for lathes and planing-machines; and also for holding a boring-tool for such shallow work as is capable of being bored out on the chuck of a lathe.

It consists in a metallic bar, preferably of rectangular section, provided with devices for holding the various tools required, is herein fully set forth.

By refercnce'to the drawings, it will be. seen that one end of the "bar Ais formed for holding the tools for ordinary lathe-work, as the turning-tool, cuttingoi' tool, thread-tool, and the like, or for holding a planing-tool, when the invention is used in the toolpart of a planing-machine. l

The other end is formed -for holding a boring-tool, for any shallow work capable of being bored out on the face-plate or chuck of a lathe.

Both ends are provided with screws for securing the tool.

On one side of the tool, and near the end of the saine, a shallow dovetailed recess. B, is planed ont to the end ofthe bar.

A slit, a., is then sawed through the bar, extending from its extreme end back nearly or quite the length ofthe recess, and at right angles to the bottom of the same, thus forming two spring-jaws, C D, through which a clamp-screw, E, passes.

The threaded part of the screw works in a hollow thread, in the jaw D, while the cylindrical part works ti'eelyin an unthreaded hole in the jaw C, as shown in tig. 3.

The heads G of both screws may be formed square, hexagonal, or capstanjheaded, as desired.

The tool H is formed to tit inthe recess, its edges being either dovetailed, bevelled, or grooved, to' rit easily within the recess B, filling the same as far as the tool extends back.

The jaws are drawn toward each other by the clampscrew, and thus bindthe tool rlnly in the recess.

The tools are milled out in the proper fo'rm, in a y milling-machine, ,and may befeformed with increased thickness of metal at the upper edge, as shown, to confer greater stiffness to it in the line of its cuttingpoint b.

The opposite endof the holder is bored out to about half its length, for the recption of a round oroctagonal shank of a boring-tool, I, and is recessed at the endto' receive a gib, J, having a concave or V-shaped groove, which enables the said gib to set upon the boring-tool, as shown.,

A recess, K, works in a hollow thread in the bar, and is so arranged that the point-ofthe said screw impinges'vagainst the gib, and Abears it upon the boringtool, as shown at-figs. 2 and 4.

In using this tool-holder, it is secured in the toolpost of the lathe or planing-machine, and from its form and usual dimensions, is adapted to be thus secured in the eye or mortise of tool-posts, in the mannei in which the main b'ody of the bulky tools, as hereto re made, are secured.

t will be observed that the bar A need not necessarily combine the devices for holding the boring-tool I with the spring-jaws C and D, for the said bar may be made plain at one end, while the other may contain either of the two dierent tool-holding devices; and I desire to be understood as not limitin my invention to, this double formation of the bar, a though, when so made, it is .of course ,Y more useful as a toolholder in general.

One of the principal advantages of this invention obtains in the fact that the tools employed are comparatively small, easily made and iitted, and the points are easily renewed when dnlled or worn, and in wear and renewal the tools can be used up to within much less than half of their original length, and still be held firmly in the holder.

The dovetailed form of the recess is perhaps the most preferable, as being most easily made, but it will be obvious that the sides of the said recess may' have a V-shaped or semicircular section, and the tools be formed with corresponding grooves; but such modification partakes essentially of the spirit of the invention, and I desireto be understood as not limiting myself to the precise form of the sides of the recess, as illustrated by the drawings.

When one end ofthe tool-holder is used, the screw of the other cud is generally removed, to enable the stock A to be inserted in the mortis@ ofthe toolpost.

I claim as new, and desire to secure by Letters Patentl 1. The improved tool-holder A, When constructed as set forth, to hold both the tools H and I, inthe manner described.

2. The tools H b, in combination with a tOolLhQIder, A, all constructed substantially as set forth.

The above specification of my invention signed by me, this 29th day of September, 1868.

C. H. REID.

Witnesses:

FRANK BLocKLEY,

F. ROBERTS.

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