US402694A - Art of maeing ttjen buckles - Google Patents

Description

OOOOOOOO Patented May 7, 1889.

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' J. H. SIMPSHV. A ART OP MAKING TURN BUCKLES.

No. 402,694. Patented May '7, 1889.

N. Firms, Pmwumgmpher. wami a UNITED STATES ATENT OFFICE.

JAMES H. SIMPSON, OF PITTSBURG, PENNSYLVANIA, ASSIGN OR TO OARNEGIE, PI-IIPPS t COMPANY, (LIMITEDQ OF SAME PLACE.

ART OF MAKING TURN-BUCKLES.

SPECIFICATION forming part of Letters Patent No. 402,694, dated May 7, 1889.

Application led October 22, 1888.

.T all whom it may concern:

Be it known that I, JAMES H. SIMPSN, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement inthe Art of Making Turn-Buckles; and I do hereby declare the yfollowing to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, formingpart of this 1o specification, in Which- I Figure 1 is an end view of the blank from which the turn-buckles are made according to my process. Fig. 2 is a plan view thereof. Fig. 3 is a plan View of one of the flatteningdies which I use to flatten the blank in practicing the iirst step of the process. Fig. 4 is a vertical longitudinal section of the two iiattening-dies with an interposed blank. Fig. 5 is a vertical longitudinal section of the punch 2o which is used for cutting the blank in order to form the straps. Fig. 6 is a cross-section of the tools which I employ in spreading the strap-pieces after the blank has been cut, as just stated. Fig. 7 is a vertical longitudinal section showing the forging-dies and the end compressing and punching dies with an interposed blank. Fig. 8 is a vertical cross-section on the line a; a: of Fig. 7. Fig. 9 is a vertical cross-section on the line y y of Fig. 7. The

3o iigures on Sheet 3 of the drawings illustrate another mode of forming the flattened solid blank with enlarged ends from which the buckles are made. Fig. 10illustrates the original blank in end View. Fig. 11 is a plan view,

3 5 and Fig. 12 is an edge view thereof. Fig. 13 is an end view of the blank in connection with the dies for compressing and enlarging the ends, and Fig. 14 is a plan view of the blank either of Fig. 12 or Fig. 4 after it has 4o been punched by the mechanism shown in Fig. 5.

Like symbols of reference indicate like parts in each.

In practicing my invention I take a blank,

2, consisting of an integral piece of metal of a little greater length than the desired length of the finished turn-buckle and preferably cylindrical in shape, Figs. 1 and 2, and form it by suitable means so that its end portions 5o shall be large relatively to its middle portion.

Serial No. 288,782. (No model.)

I illustrate tools for this purpose in Figs. 3 and 4, consisting of two dies, 5 and 6, having end cavities, which are adapted to leave the extremities of the blank unreduced, and having at the middle projecting portions, which compress and reduce the interposed blank when the latter is heated to a welding heat,

as will be readily understood. I then take the flattened blank and place it on the bolster 3 of a punch, Fig. 5, and by means of the 6o moving' or male punch 4, which is adapted to work into the cavity of the bolster and is of the same length as that of the desired out, I cut the flattened portion of the blank longitudinally, preferably eXsecting a piece therefrom and bringing it into the form shown in Fig. 14. The construction and mode of operation of the punch are sufliciently illustrated in the drawings, the cavity of the bolster being of proper shape to receive and 7o hold the blank. I then preferably spread the cut portions of the blank, in order to widen the straps out to their proper position. This I do by means of the apparatus shown in Fig. 6, which comprises a block or anvil, 7, 75 having a cavity of the proper shape and size to receive the blank, the width of the cavity being substantially that of the finished buckle, and an expanding or spreading mandrel, 8, having a wedge-shaped lower end, which is 8o adapt-ed to enter the cut portion of the blank and to spread out the sides thereof into contact with the sides of the cavity against which they are compressed and shaped. The spreading of the straps is unnecessary in case the punch 4 be made wide enough to cut the cavity in the blank of the proper width desired between the straps of the finished turn-buckle. The flattened, cut, and spread blank is then ready to have the straps and the ends or nut 9o portions forged and shaped. I prefer to do this in the dies which are shown in Figs. 7, 8, and 9. These comprise two dies, 9 9, which are adapted to operate on the sides of the turnbuckle blank, having longitudinal cavities for the straps, central tongues, 10, which work in the space between the spread straps, and end cavities which receive the end or nut portions of the blank, There are also end dies carried on plungers 11, having project- Ioo ing punch-tongues12 and annular portions or collars 13 at the bases of the tongues 12, which are adapted to engage the ends of the nuts of the buckle.

The plungers 11 are adapted to move up to the ends of the dies 9, so that the tongues 12 on the plungers shall enter the ends of a blank interposed between these dies.

In using the dies the blank, having been heated to a Welding heat, is placed between them, and the dies are actuated by cams or other suitable mechanism, so as to force them upon the interposed blanks. The action of these dies compresses the straps of the blank edgewise, forging them into proper shape and holding the blank very firmly. rlhe plungers 11 are operated so as to force the tongues 12 longitudinally into the ends of the blank, and these tongues, forcing their Way into the blank, displace the metal thereof, causing it to flow out laterally into the recesses 1st in the cavities of the dies, thus giving the proper shape and proportions to the nuts, and the collars 13, at the bases of the tongues, engag ing the ends of the blank, compress them inwardly. dies after the latter have been retracted, and the buckle will be found. to be reduced to its proper shape and form, making it necessary only to remove the thin shells of metal at the inner ends of the cavities of the nut by punching or drilling. The nuts can then be screwthreaded in the usual Way.

In Figs. 10, 11, 12, and 13 I show another mode of forming the blank; with thickened end portions and relatively thinner middle portion. Instead of reducing the middle of the blank by forging, as shown in Fin'. 4, I thicken up the end portions, leaving the middle untouched, the results produced in both modes being substantially the same. ThusI take the solid blank made rectangular in cross-section, as shown in Figs. 10, 11, and 12, and by means of the dies b and c (shown in Fig. 13) I forge the ends of the blanks edge- Wise, and thus thicken them, reducing them to the form shown by dotted lines in Figs. 11 and 12,While the middle portion remains flat and of its original cross-sectional dimensions. Then the middle portion of the blank is cut out longitudinally by the punch shown in Fig. 5, and the subsequent operations on the blank. to reduce it to the form of the finished buckle are the same as before described.

By use of the expression flattened blank in the following claims I intend to designate a blank having end portions which are thick in one crosssectional dimension relatively te the middle portion, and are narrow in the other dimension relatively thereto, substantially as shown in Figs 12 and et.

The blank is then removed from the V The advantages of my improved process Will be appreciated by those skilled in the art. By it I am enabled to make turn-buckles very rapidly and With a minimum of labor and cost, and the buckles produced possess great strength and uniformity.

I do not desire to limit myself strictly to the means which I have shown and described for carrying out the process, since other instrumentalitics may be employed, such as will be understood by those skilled in the art; nor do I desire to limit my process strictly to the precise steps which I have described for car rying it into effect.

What I claim, and desire to secure by Letters Patent, is

1. An improvement in the art of making turnbuckles, which consists in cutting a solid blank longitudinally to form the straps, forging and compressing the straps, and forging and shaping the nuts, substantially as and for the purposes described.

2. An improvement in the art of making turirbuckles, Which consists in forming a flattened blank, cutting the same longitudinally to form the straps, and forging and shaping the straps and the ends or nuts, substantially as and for the purposes described.

3. An improvement in the art of making turn-buckles, which consists in forming a blank with straps and with solid ends and punching and compressing said ends longitudinally, displacing the metal thereof laterally, the said ends being confined Within diecavities suitably recessed, into which recesses the displaced metal fioWs, substantially as and for the purposes described.

et. An improvement in the art of making turn-buckles, which consists in forming the Vstraps of a blank having solid ends, punching and compressing said ends longitudinally and displacing the metal thereof laterally, the said ends being confined Within die-cavi ties suitably recessed, into which recesses the displaced metal flows, and simultaneously compressing and forging the straps, substantially as and for the purposes described.

5. An improvement in the art of making turn-buckles, which consists in forming a fiattened blank with solid ends, cutting the same longitudinally, spreading the cut side portions of the blank, and then compressing and forging the said side portions, and punching the end portions to form the nuts, substan tially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 4th day of October, A. D. 1858.

JAMES lI. SIMPSON.

Witnesses:

W. B. Cont/vin, J. K. SMITH.

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