US89702A - Improvement in wrenches - Google Patents

Description

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. GEORGE C. TAFT, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO LORING GOES, OF SAME PLACE.

Letters Patent No. 89,702, dated Ma/y 4,1869.

Know all men by these presents:

That I, GEORGE O. TAFT, of the city and county of Worcester, and Common wealth of Massachusetts, have invented certain new anduseful Improvements in Screw- Wrenches, of which the following is a full, clear, and exact description, reference being had to the accompanyling1 drawings, forming a part of this specification, in w 1c Figure 1 represents a side view of a screw-wrench,A with my improvements applied thereto, the rear end of the handle being shoum broken away, and

Figure 2 represents a section on line A B, fig. l.

To-enable those skilled in the art to which my invention belongs, to make and use the same, I will describe it more in detail. l

The nature of my invention consists- First, in the combination with the shankand ferrule of a wrench, of a divided quill, as and for the purposes hereafter explained.

Second, in the combination with the rear projecting-end of the rosette-screw, of a set or stop-nut, as and for the purposes explained.

In the drawing- A is the ferrle, which is supported against the back strain of the rosette-screw B, when the wrench is used, by means of a divided quill, G, arranged upon the shank D, and overwhich the handle E is slipped, before the rear nut F is screwed upon the end of shank D.

In a previous invention for which I applied for Letters Patent, alwhole quill, O, was used for a similar purpose, but practical objections are found to exist to the use of a whole quill, for the reason, that if the. vshank D is not always of the same size, quill O is liable to either bind, when itis slipped on, or else it goes on with a too loose iit. Y

These objections are obviated by the use of a divided qull, as shown in the drawings, since they can be made in sections less than half the size of shank D, and consequently will t shanks of an under-size, as well as shanks of over-size.

In making the sections of the quill, I prefer to make the end next to the vferrule the largest, and tapering towards the rear end, to conform to the ordinary shape of the shank.

When nut Fis screwed up, it forces the forward ends of the sections of the quill against the inner shoulders of the ferrule, as indicated in dotted lines, whereby the back strain on the ferrule, which is sustained, in the ordinary Goes wrench, by the handle E, is transferred direction, thus changing the desired opening H, be- Y tween the movable jaw G and stationary jaw I.

' To overcome and guard against such occurrences, the rear end of the rosette-screw B is made so as to project back of the rosette J, and through projection K of ferrule A, a suflicient distance to receive a check or stop-nut L, which is provided with a screw-thread,

to fit a screw-thread cut on the projecting end a of therosette-screw spindle B.

The operation is as follows: Y

When the wrench is to be used -in the ordinary manner, nut L is turned back, and the rosette-screw B can be turned freely in either direction; out when the wrench is to be used on a uniform-sizedA nut, the movable jaw'G is adjusted by means of rosette J and screw B, after which stop or check-nut L is turned up, thereby drawing rosette J back against the projection K of ferrule A, and locking-screw B, in a fixed position.

It may be well to upset theprojection a slightly,

after nutl L has been screwed on, for the purpose of preventing the accidentaldisplacement and loss of said nut.

Having described my improvements in screwwrenches,

What I claim therein as new, and of my invention,

land desire to secure by Letters Patent, is-

1. The combination, with the shank D, ferrule A, and nut F of a wrench, of one or more sections of a supporting-quill, substantially as and for the purposes.

set forth;

2. A stop or check-nut L, substantially as and for thepurposes set forth.

3. The combination, with the ferrule A, shank D, and rosette-screw spindle B, of a divided quill, O, and stop-nut L, substantially as and for the purposes set forth.

GEO. 4O. TAFT.

Witnesses:

THos. H. DODGE, GRAS. H. BURLEIGH.

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