US402692A

US402692A - simpson

Info

Publication number: US402692A
Authority: US
Publication date: 1889-05-07
Anticipated expiration: 1906-05-07

Description

oooooooo '7 4 2 Sheets Sheet 1. J. H. SIMPSON. OF MAKING TURN BUGKLES No. 402,692. Patented May 7,1889.

(No Model.)

I 2 Sheets-Sheet 2. J. H. SIMPSON.

ART OF MAKING TURN BUOKLES.

PatentedMayV, 1889.

UNITED STATES PATENT OFFICE.

JAMES H. sIMPsoN, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR ro CARNEGIE,

' PHIPPS & coMPANY, (LIMITED) or SAME PLACE.

ART OF MAKING TURN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 402,692, dated May 7, 1889.

Application filed July '7, 1888. Serial N0.279,Z78. (N0 model.)

To all whom it "may concern.- I

Be it known that I, JAMES H. SIMPSON, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in the Manufacture of Turn-Buckles; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming part of this specification, in which+ Figure 1 is an end view of a blank from which a turn-buckle is made according to my invention. Fig. 2 is a plan view thereof. Fig. 3 is a vertical cross-section of the cuttingtools which I employ for cutting the blank to form the straps. Fig. 4 is a vertical crosssection of the tools which I employ for spreading the blank when it has been thus cut. Fig. 5 is a plan view of one of the dies which I employ for compressing the blank laterally. Fig. 6 is a vertical cross-section through the pair of such dies, showing an interposed blank, the section being on the line 3 y of Fig. 8. Fig. 7 is a plan view of one of said dies in connection with the end-compressing dies, showing also an interposed turn-buckle in longitudinal section through both straps. Fig. 8 is a vertical longitudinal section on the line a; 00 of Fig. 7. Fig. 9 is a plan view, and Fig. 10 a side View, of the finished turn= buckle.

Like symbols of reference indicate like parts in each.

In the practice of my process I take a hollow blank, 2, of about the length of the turnbuckle desired-such as shown in Figs. 1 and 2-which blank is either a completely welded tube or a tube the edges of which, though preferably scarfed, have not been welded, (see Fig. 1,) and I place this blank on a support, 3, the concavity of which is of about the same diameter as that of the blank for the turn-buckle, and by means of knives at, which work toward each other, as shown in Fig. 3, I cut through the sides of the blank. The length of these knives is such as to produce in the blank a cut of about the length desired for the straps of the finished buckle, and their cutting-edges are preferably concaved, so that they shall not only cut the middle portion of place it while in a heated state in the cavity of the supporting-block 5, Fig. 4, and by means of a spreading or expanding mandrel, 6, having a wedge-shaped end, which enters the said cavity between the longitudinallycut portions of the blank, I spread these out portions until they have been expanded to the lateral limits of the cavity of the block 5, and when thus spread the action of the mandrel closes and compacts the folded-in portions of the blank, reducing them to the form shown in Fig. 4.

The spreading of the blank is performed, preferably, by causing the expanding-mandrel to enter the blank once while it is on its side, and then reversing the blank and cansing it to enter the same on the opposite side, since this gives greater regularity to the finished straps. By the action of the knives 4 and the expanding-mandrel 6 the strap portions of the blank are defined and partially formed; but the end portions, which form the nuts of the buckle, are not substantially altered from the original tubular form of the blank. I now take the blank so formed and forge and shape it to the proper shape for the finished buckle. This I do, preferably, by the dies 7. (Shown in Figs. 5, 6,7, and 8.) There are two of these dies, which are arranged either horizontally or Vertically, and which are provided with working-faces of the shape of the finished turn-buckle and with central tongues, 8, which are adapted to fit in the cavity between. the straps of the buckle. There are also end dies consisting of tongues or mandrels 9, having collars 10 at their bases, which are fixed to suitable plungers, 11. The external diameter of the tongues or mandrels 9 is substantially the same as the internal diameter of the nuts of the turn-buckle, and they are adapted to enter the hollow end portions of the blank within the end cavities of the dies 7 and the collars 10, also entering said cavities, are adapted to engage the extremities of these hollow end portions. (See Fig. 7.) The dies 7 and the plungers 11 are actuated by cams or other suitable mechanism, which give to them a compressing action, and when the blank at a welding heat is placed between thorn the compression of the dies 7 edgewise upon the straps compresses and welds them solidly, and the end compression of the collars 10 upon the blank compresses the blank lengthwise, forcing the hollow end portions inward, and causing part of the metal thereof to flow out laterally into recesses 12 in the end cavities of the dies, which are of proper shape and location to impart the desirable strengthening-ridges to the buckle, as shown in Figs. 9 and 10. The tongues 8 of the dies meanwhile prevent distortion of the straps of the blank, and the tongues 9 prevent internal distortion of the nuts. hen the blank is removed from the dies, it needs only the removal of the thin shells of metal at the inner ends of the nut portions, either by punching or drillin The advantages of myinvention will be appreciated by those skilled in the art. The dividing of the blank without exsect-ion. of the material thereof prevents weakening of the blank, and the folding in of the material adds to the compactness and solidity of the finished buckle.

In aprior application, Serial No. 7 2,7 56, filed May 4, 1888, I have described and claimed, broadly, the manufacture of turn-bu ckles from hollow blanks by dividing the middle portions thereof and then shaping the buckle.

I do not herein desire to limit the process to the use of the particular instrumentalities which I have shown for practicing it, since other tools may be employed; nor do I limit the steps of the process precisely to those which I have shown and described; but

hat I claim as my invention is 1. An improvement in the art of making turn-buckles, which consists in splitting a tubular or hollow blank longitudinally between its ends and turning in upon themselves the out portions, substantially as described.

2. An improvement in the art of making turn-buckles from tubular or hollow blanks, which consists in forming the straps by splitting the blank longitudinally between its ends and turning in upon themselves and forging the cut portions without excising any of the substance, substantially as described.

3. An improvement in the art of making turn-buckles from tubular or hollow blanks, which consists in splitting the blank longitu dinally from opposite sides between its ends without excision, folding in upon themselves and forging the cut portions to form the straps, and forging the end portions to form the nuts,

' substantially as described.

4,. An improvement in the art of making turn-buckles from tubular or hollow blanks, which consists in splitting the blank longitudinally from opposite sides between its ends without excision, folding in upon themselves the cut edges of the blank to form the straps, spreading and compressing the straps, and forging the end portions to form the nuts, sub stantially as described.

5. An improvement in the art of making turirbuckles from tubular blanks,'whichconsists in splitting the blank longitudinally between its ends and turning in upon themselves the cut portions and compressing the ends lengthwise upon mandrels to form the nuts, substantially as described.

6. An improvement in the art of making turn-buckles from tubular blanks, which consists in splitting the blank longitudinally between its endsto form embryotic straps and hollow nut portions, turning in upon themselves the cut edges to form the straps, compressing and spreading such strap portions, and compressing en dwise and shaping the nut portions upon mandrelsand within dies, substantially as described.

In testimony whereof I have hereunto set my hand this 7th day of June, A. l). 1888.

JAMES H. SIMPSON.

\Vitncsscs:

THoMAs W. BAKEwELL, \V. B. OORWIN.