US113743A - Improvement in the modes of forming the heads of wrench-bars - Google Patents

Description

UNITED STATES PATENT OFFICE.

AURY G. GOES, OF WORGESTEB, MASSACHUSETTS.

IMPROVEMENT IN THE MODES 0F FORMING THE HEADS 0F WRENCH-BARS.

Specification forming part of Letters 'Patent No. 113,743, dated April 18, 1871.

To all whom it Imay concern:

Beit known that I, AURY G. GOES, of the city and county of Worcester and State of Massachusetts, have invented certain new and useful Improvements -in Mode of Forming Wrench-Bar Heads; and l do hereby declare the following to be a full and exact description of the same, reference being had to the accompanying drawing,which forms a part of this specilication, in which Figure l represents a perspective view of a wrench-bar head after being subjected to the first process of formation. Fig. 2 represents a side view of the same. Fig. 3 represents a front view of the same. wrench-bar head as formed preparatory to finishing. Fig. 5 represents a front view of the head as formed preparatory to nishing, and Fig. 6 represents the head when nished. Fig. 7 represents a'vertical central section of the forming-dies, wrench-bar, and partially-formed wrench-head on line A B, Fig. 8; and Fig. 8 represents a similar view on line G D, Fig. 7.

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

As wrench-bar heads have heretofore been formed, it has been the usual practice to use a bar of metal of sufiicient width and thickness to make the head, and to then roll or forge down the bar of the wrench to the required size, which is a slow and comparatively expensive process, and, besides, by such inode of formation, it is difficult to produce a sufficient fullness at the lower corners of the head, and as a consequence the wrench, when finished, shows scars and aws at the junction of the head and bar, which detracts very much from the appearance and value of the wrench, the only alternative being to use a large surplus of metal, which requires to be slabbed of inthe process of finishing the head, and consequently very much increases the waste of material and cost of manufacture. Then, again, no successful mode has been devised, previous to my present invention, whereby the head could be formed from a piece of metal rolled to the size, or near the size, of the re- Fig. 4 represents the quiredA wrench-bar, the bar and head being formed in one piece.

The object of my present invention is to produce a wrench-bar head which shall have the required fullness at its corners without a surplus of metal, and also to form the head from and upon a small bar, so as to obviate the necessity of forging or rolling down said bar 5 and my invention consists in first upset ting the end of a piece of metal of the size, or near the sizeof the required wrench-bar into the peculiar shape, as hereinafter described, to form the head, and afterward forging or pressing the head into the required shape for finishing. V

My improved mode of forming wrench-bar heads is as follows: y

A piece of metal, rolled to the size, or nearly the size, of the required wrench-bar A, is arranged in a suitable die, A', and its end upset, by means of properly-applied pressure, to producethepeculiarly-shaped blank head B. The forming-dies A and D are of such shape that the blank head B will be formed with an upward inclination or bevel, G, at its lower side, while its upper rear corner, D, will be made with an inward inclination, as indicated in Figs. 2 and 3 of the drawing.

After the head B has been upset to the form shown in Figs. l, 2, and 3, itis removed from the forming-die, and is subjected to suitable shaping mechanism, wherebyl the head is elongated and flattened to the proper shape for finishing, as shown by Figs. 4 and 5. For this part of the process I prefer a machine consisting of a drop and a pair of lateral cheek-prcssers, the drop and cheek-pressers acting upon the head alternately, similarto that heretofore patented by L. and A. G. Goes.'

It will be understood that the face of the drop-die is made to correspond in shape to the required form of the upper side of the head, it being provided with a suitable angle to bend down the forward end of the head B, and thereby produce the bevel E at the upper side thereof, while the lower side is at the same time bent down at a right angle with the bar A, as shown at G', Fig. 4.

By the operation of bending down the forward end of the head the metal is forced out.

Ward at thesides a a, as indicatedinFigs. 4 and. 5, thus producing the required fullness at the corners, the eXtreme end being at the same time Worked forward in a very perfect and easy manner.

the required size of the finished bar, soas to allowsr suicient metal to insure a smooth finish upon Jche bar.

Having described my improvements in the mode of forming Wrench-bar heads, what I claim therein as new and of my invention, and desire to secure by Letters Patent, is

Reducing the head B, shown in Fig. l, to the shape shown in Figs. 4 and 5, in the manner substantially as described.

AURY G. GOES.

Witnesses: l

Trios. H. DODGE, n A. E. PEIRCE.

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