US402690A

US402690A - simpson

Info

Publication number: US402690A
Authority: US
Publication date: 1889-05-07
Anticipated expiration: 1906-05-07

Description

(No Model.) 3 SheetsSheet 1.

J. H. SIMPSON. MANUFACTURE OF TURN BUGKL'ES. No. 402,690. Patented May 7,1889.

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3 Sheets-Sheet 2.

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- J. H. SIMPSON.

MANUFACTURE OF TURN BUGKLBS.

No. 402,690. Patented May 7, 1889.

(No Model.) M Q 3 Sheets-Sheet 3.

" J. H. SIMPSON.

MANUFACTURE OF TURN BUGKLES.

No. 402,690. I Patented May '7, 188,9.

N. PETERS, Pholo-Lilhngnpher, Wuhi nnnnnn Q UNITED STATES ATENT FFIcE.

JAMES H. SIMPSON, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR TO CARNEGIE, PHIPPS & COMPANY, (LIMITED) OF SAME'PLACE.

MANUFACTURE OF TU RN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 402,690, dated May '7, 1889.

Application filed May 4, 1888. Serial No. 272,7 56. (No model.)

'which I make turn-buckles according to my improved process.

Fig. 2 is an end View thereof. Fig. 3 is. a plan view of one of the dies which I use in the process, showing the end dies in vertical section. Fig. 4 is a horizontal section of the two dies shown in connection with an interposed blank which has been operated on by the dies. Fig. 5, Sheet 2, is a plan View of one of the turn-buckle blanks after its middle portion has been punched out according to the second step of the process. Fig. 6 is a vertical longitudinal section on the line ca 00 of Fig. 5. Fig. 7 is a vertical cross-section on the line 'y y of Fig. 6. Fig. 8 is a face view of one of the finishing-dies. Fig. 9 is a vertical cross-section of both finishing-dies with an interposed turnbuckle. Fig. 10, Sheet 3, is a horizontal 1ongitudinal section on the line z 2 of Fig. 9.

Fig. 11 is a similar view showing a modified form of die, in which only a part of the turnbuckle is shaped at one operation. Fig. 12, Sheet 2, is a side view of the finished turnbuckle. Fig. 13 is a plan View thereof. Fig. 14 is a vertical cross-section on the line a u. of Fig. 13. Fig. 15 is an end view of the turnbuckle shown in Fig. 13.

Like symbols of reference indicate like parts in each.

In the practice of my invention I first take a blank, 2, consisting of a tubular piece of wrought iron or steel of about the desired length of the turn-buckle, and compress it at its middle portion, leaving the ends still tubular, there being preferably one or more pieces of metal inserted within the tube before compression, so that its sides shall be flattened down upon this piece, as shown in Fig. 4. I then take the article in this stage of its manufacture, punch out the middle portion, and then, by means of an expanding-die, swell out the sides of the punched part so as to bring it into the shape shown in Figs. 5, 6, and 7. Then, by means of suitable dies, or otherwise, I shape the sides of the cut-out portion so as to bring them into a regular round or elliptical form, and by means of a suitable tool inserted at the ends of the blank I enlarge the tubular openings thereof, so as to make them regular and to take away the flattening effect, which is produced by compressing and cutting out the middle part of the blank. This finishes the turn-buckle so far as the forging and shaping process is concerned, leaving it in condition to be tapped at the ends in the usual way.

The blank 2 may either be a piece of metal of complete tubular form or it may be a piece of metal bent aproximately into the form of a tube. In Fig. 2 I show the blank made tubular in outline, but not welded, the tube being parted and scarfed. The subsequent treatment of the blank is sufficient to weld these scarfed edges together.

Having thus generally stated my improved process, I will now describe the means which I have devised for successfully putting it into practice.

The first step of the process is carried out by means of the dies shown in Figs. 3 and 4;

There are two dies, 3 4, of the shape shown in these figures,which operate upon the sides of the blank, and end dies or cheelcpieces, 5, which are adapted to fit against the ends of the dies 3 and 4 and which carry mandrels 6, which are intended to fit within the hollow ends of the blank. I take the blank 2 of the shape shown in Figs. 1 and 2, and having placed in the blank a filling piece or pieces of metal, 7, I set the blank between the dies 3 and 4, with the mandrels 6 fitting within the ends of the blank. For this purpose the dies 5 are made movable to and from the ends of theblank. The dies 3 and 4, or one of them, are then moved to compress the side of the blank and flatten it down in the middle, as shown in Fig. 4, the mandrels 6 at the same time preventing the tubular shape of the ends of the blank from being distorted. Then by means of punches and an expanding-mandrel of suitable kind, which are not necessary to be shown in the drawings, I punch out the middle part of the flattened blank with the interposed piece 7 and force out or expand the sides of the excised portion, so as to bring it into the forms shown in Figs. 5, [hand 7,thus reducing it approximately into the form of the finished turn-buckle. It, however, needs further treatment, because the sides of the flattened portion which form the straps of the buckle are not regular, and the inner ends of the tubular portion of the buckle are contracted. In order then to shape the sides of the buckle and to shape the nuts, I employ the dies which are shown in Figs. 8, 0,and 10. These comprise two dies, 8 and 9, which are provided with cavities or working-faces of the shape of the finished turnbuckle and with central tongues, 10, which are adapted to fit within the internal cavity of the finished buckle. There are also end dies, 11, having cylindrical tongues 12,which are adapted to enter cavities 13 at the ends of the dies 8 and 9. The external diameter of the tongues 12 is substantially the same as the internal diameter of the ends or nuts of the finished buckle. The blank is then placed between the dies 8 and 9, so that these dies shall engage the sides of the blank, and the dies 11 are moved up so that their tongues 12 shall enter the cavities 13 at the ends of the dies 8 and 9, and shall also enter the tubular ends of the blank. The entrance of the dies 11 and tongues 12 compresses and shapes the tubular ends of the blank and redueesthem to proper tubular form, as shown in Fig. 10, and the working-dies S and 9, acting upon the sides of the blank, shape the straps of the turn-b uckle, weld them to the filling, and reduce them to regular form, as clearly shown in Fig. 9. The dies 8, 9, and 11 are actuated by suitable cams, which give them a compressing action, as will be readily understood. \Vhen the article is taken out of the dies shown in Figs. 8, f), and 10, it will be reduced to the finished form, which is illustrated in Figs. 12, 13, 14., and 15.

Of course in shaping and acting on the blank by means of the dies 8 and O the blank should be suitably heated to a welding heat before being placed within the dies. \Vith regard to these dies, their compressing action not only shapes the sides of the article, but completes the weld between the turnbuckle and the interposed filling, '7, thus making all the parts of the turn-buckle integral and producing a uniform article of very great strength.

In Fig. 11 I show a modified form of the dies. Here, instead of making the dies 8 and 9 sufficiently long to shape the whole turnbuckle at once, I make them of only one half or more of the length and use only one of the dies 11. \Vhen dies of this form are used, the ends of the turn-buckle are shaped separately-that is to say, after shaping a part of it, as shown in Fig. 1.1, the turn-buckle is removed and reversed and the other part is shaped by the dies. Other modifications of the apparatus which I employ may be made by those skilled in the art, and my invention is not limited thereto, since in this application I claim only the process of shaping the buckle as covered by me in the following claims. The process may also be modified by omission of some of the steps or substitution thereof by other steps of an analogous kind.

The advantages of my invention will be appreciated by those skilled in the art. The turn-buckles produced are very' strong, because there are no welds which are liable to be broken when the buckle is subjected to strain, and the process can be practiced with little cost and very rapidly. The advantage of the interposition of the filling-piece 7 is that the sides of the filling serve to re-eni'orce the straps of the buckle, and to make them of the desired thickness and of great strength. The process may, however, be practiced by omitting the use of this inserted piece.

I claim as my invention 1. An improvement in the art of making turndmckles, which consists in dividing a tubular or hollow blank longitudinally be tween its ends and then shaping the blank by forging, substantially as and for the purposes described.

2. An improvement in the art of making turn-buckles, which consists in flattening a tubular or hollow blank between its ends and forming the straps by cutting out the flattened part longitudinally, substantially as and for the purposes described.

An improvement in the art of making turn-buckles, which consists in forming the straps by dividing a tubular or hollow blank longitiulil'ially between its ends and compressing and shaping the ends to form the nuts, substantially as and for the purposes de' scribed.

4. An improvement in the art of making turn-buckles, which consists in forming the straps by dividing a tubular or hollow blank longitudinally between its ends, forging the strap portions, and compressing and shaping the ends to form the nuts, substantially as and for the purposes described.

5. An improvement in the art of making turn-bucldes, which consists in flattening a tubular or hollow blank between its ends upon an inserted filling and forming the st 'aps by cutting out the longitudinal middle part of the flattened portion and filling, and then shaping and welding the blank by forging, substantially as and for the purposes de scribed.

6. An lli'lDl'OVGl'llGlll] in the art of making turn-buckles, which consists in forming -a blank with straps, and hollow or tubular nut portions, and compressing endwise and shapin g the nut portions upon in andrels and within dies, substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 2d day of May, A. D. 1888.

JAMES II. SIMPSON.

\Vitnesses:

W. B. CORVVIN, .Lvo. K. SMITH.