US352037A - Tool-holder for grindstones - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. I. CARE.

TOOL HOLDER FOR GRINDSTONES- No.352,037. PatentedNov. 2, 1886.

N. PETERS Plmlo-L'xlhagraphar. Wanhingtnn. n c,

' (No Model.) 2 Sheets-Sheet 2.

J. I. CARR.-

TOOL HOLDER FOR GRINDSTONES.

UNITED STATES PATENT OFFICE.

JOHN I. CARR, OFOHICAGQ, ILLINOIS.

TOOL-HOLDER FOR GRINDSTONES.

SPECIFICATION forming part of Letters Patent No. 352,037, dated November 2, 1886 Application filed February 9 1886. Serial No..191,l88. (No model.)

To all whom it may concern.-

Be it known that 1, JOHN I. CARE, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Supplemental Tool-Holders for Grindstones, of which the following, in connection with the accompanying drawings, is aspecification. v

The purpose of myinvention is to extend the capacity or usefulness of tool-holders for grindstones. To that end I employ a supple mental holder or device adapted to be used in conjunction with tool-holders of the class referred to; and myinvention consists in certain novel features of construction, hereinafter set forth in my claims, and which I will now proceed to describe with sufficient particularity to enable those skilled in the art to appl my invention to use.

In the drawings, Figure 1 is.a side view of a tool-holder illustrative of my improvements, showing the manner in which the same is applied to use. Fig. 2 is a top view of my improved supplemental holder, enlarged, and representing so much of atool-holder for grindstones as maybe necessary to further show the manner of applying the supplemental holder to the holder proper. Fig. 3 is a side view of the supplemental holder detached. Fig;

4 is a side view of my supplemental holder, represented in connection with a tool-holder different from that shown in Fig. 1, the supplemental holder being in the reverse position from that shown in the figurelast referred to. Fig. 5 is a detail, enlarged, the same being a top view of the single or larger jaw of the supplemental holder,and showing its relation to the holder proper; andFig. 6 is a detail of one of the smaller jaws.

Like letters of reference indicate like parts.

Arepresents a grindstone, andB is its frame or support.

O is atool-holder for grindstones. The holder 0 shown in Fig. 1 is substantially the same as that shown and described in Letters Patent of the United States of America No.

277,958, granted to George H. Strong and myself the 22d day of May, 1883, for the improvementstherein set forth, and the. holder 0 shown iir'Fig. 4 is substantially'the same as that shown and described in'Letters Patent of the United States of America No. 277,883, and granted to me the 22d day of May, 1883, for the improvements therein set forth. I need not, therefore, here describe either of the said tool-holders with particularity. A feature of construction common to both of the said toolholders is, that each has a clamp, D, for holding the tool firmlywhile it is being ground. In each of the said holders provision is also made for presenting the tool to the stone at different angles or inclinations, according to a comparatively small clamp, 12 b, and at its central portion a comparatively large clasp, c. The clamps b b consist of rigid horizontal extensions d dand of set-screws e e, entering and passing through the upper ones of these extensions. The lower extensions, d d, are inclined, being highest at their outer ends or edges, and are arranged directly underneath the lower ends of the screws e 6, all of which is clearly shown in Figs. 3 and 6.

plate, f, extending rigidly from the central part of the bar 6 in a direction opposite from that in which the parts (1 d extend, and of a plate, g, corresponding, in form to the plate The clasp 0 consists of a comparatively broad and flat part or drops a little near its clamping-edge and then inclines upward, and the corresponding end of the plate 9 is formed to clamp the tool downupon the inclined or upturned part of the plate f.

In Fig. 6 I have shown a pivoted plate, j, arranged on the lower extension, d, for the purpose of adapting the clamps b b to fit the tool nicely; but the plate 9' is not essential.

To use my supplemental holder for the purpose for which it is intended, I arrange it in the clamp D of any tool-holder for grindstones capable of receiving it, and make it fast there in the same manner that tools are secured therein for being ground-for example, as shown in Figs. 1 and 4. To grind a drawshave, E, I place it in the clamps b b, as indicated inFig. 2. It will be perceived that the whole cutting-edge is exposed between the said clamps, and that the back edge is for an equal distance exposed and out of contact with the holder. The tool to be sharpened stands far from the holder 0, and is also so exposed in the supplemental holder as to be capable of being ground from its rear edge to its front or cutting edge as well as along the entire length of the latter edge. Draw-shaves of different sizes may thus be firmlyheld for being ground, and the work may be done without obstruction being offered by any part of the toolholder. The tool to be ground may be also flatly presented to the, stone. The supplemental holder may also be so clamped by the holder proper that the tool to be ground will be a greater or less distance from the top of the stone, as may be desired, thus varying the bevel on that side of the tool in contact with the stone, and the tool'holder is not liable to strike the stone at any time. The tool which is being ground can also be adjusted endwise in the clamps b b, and also adjusted laterally by moving the clamp D (shown in Fig. 1) laterally on its supporting-rod F, as described in the said Letters Patent N 0. 277,958, so that any length of shave may be ground without changing the bevel.

The clasp cis intended to hold such articles ascase-knives, F, Figs. 4 and 5. To use this part of the supplemental holder it is so arranged in the holder proper that the plate 9 will be clamped down upon the knife or other article, the knife or other article being first arranged between the plates f and g. It will be perceived, on reference to Fig. 4, that the knife will be held down quite flatly against 'the stone, and that its entire cutting-edge (see Fig. 5) will be exposed for being ground, only a comparatively small part of the back of the knife being held in the clasp. To grind the blades of scissors and like articles requiring a very short or narrow bevel,I reverse the supplemental holder, or turn it over so that the plate f will be uppermost, thus presenting the blade to be ground to the stone at a considerable angle or inclination thereto.

In using either part of the supplemental holder, I also make use of the holder proper in any way that will be of advantage.

It will now be perceived that the supplemental holder adds greatly to the usefulness of the holder, or extends its capacity for usefulness by increasing the range of work. I do not, therefore, here intend to restrict myself to the combination of a supplemental holder with any particularholder proper. Neither do I intend to restrict myself to all the details of construction shown and described relating to the supplemental holder; but,

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A supplemental tool-holder for tool-holders for grindstones, the said supplemental holder having branching or diverging arms a a, adapted at or near their junction to be clamped by the tool-holder proper, and the outer end ofeach of the said arms having thereon a clamp for clamping the tool to be ground, and the said arm also havingthereon a central clamp extending in an opposite direction from the said two clamps, substantially as and for the purposes specified.

2. A supplemental tool'holder for tool-holders for grindstones, the said supplemental holder having branching or diverging arms a a, the said arms having on their outer ends the clamps b I), having inclined lower jaws, and the said arms being also adapted to be clamped at or near theirjunction by the toolholder proper, substantially as and for the purposes specified.

3. As a new article of manufacture, a supplemental tool-holder for tool-holders for grindstones, the said supplemental holder having therein two clamps arranged apart from each other upon a bar connecting them, and the said bar having thereon a central clasp, 0, consisting of the fixed plate f and the hinged plate 9, extending in the opposite direction from the said clamps, substantially as and for the purposes specified.

In testimony that I claim the foregoing as my own I hereunto affix my signature in presence of two witnesses.

JOHN I. CARR.

lVitnesses: V

F. F. WARNER, H. S. BURKI-IARDT.

Images