US239737A - Manufacture of staples - Google Patents

Description

no Model.)

- C. W. DEAN.

\ Manufacture of Staples. .No. 239,737. "Patented April 5,1881. 2 23- KZZ//////////V/'//'/// ///A WITNESSES;

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CHARLES W. DEAN, OF SOUTH WAREHAM, MASSACHUSETTS.

MANUFACTURE OF STAPLES.

SPECIFICATION formingpart of Letters Patent No. 239,737, dated April 5, 188 1.

Application filed December I0, 1880. (No model.)

To all whom it may concern:

Be it known that l, CHARLES W. DEAN, of South Warcham, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in the Manufacture ofStaples, of which the following is aspecification.

My invention applies more especially to the manufacture ofsmall staples or double-pointed tacks for fastening carpets, or for other purposes, but may be also applied to staples of any of the usual sizes for common uses.

My invention aims to form staples from bars of metal in lieu of wire, as heretofore, in .a more rapid and economical manner, and which will also insure certain advantageous qualities in the staples.

To this end the chief feature of my invention, briefly stated, consists in forming staples by cutting them successively from bars ofmetal in aform approximating to theirfinished shape, with their legs diverging, and then bending these legs parallel, or nearly so, to complete the staple, as hereinafter fully set forth.

Figures 1 and 5 of the annexed drawings present cross-sections of metal bars of suita ble shape for the manufacture of myimproved staples. Figs. 2 and 6 present face views of said bars having several successive transverse cuts made on the end thereof in the proximate form of staples. Figs. 3 and 7 represent, respectively, one of these cuts or sections detached, forming approximate or rudimentary staples. Figs. 4 and 8 represent the same with their legs bent parallel, or nearly so, forming-the completed staple. Figs. 9, 10,11, and 12 represent perspective cross-sectional views of bars of various forms with sharp edges, for the manufacture of the staples, in lieu of the square-edged bars shown in Figs. 1 and 5.

Similar letters of reference sponding parts.

From the above introduction it will'now be readily understood that to manufacture my improved staples 1 first prepare bars or narrow plates of wrought iron or steel or other metal, of preferably great length compared with their width, and of any suitable cross-section, either plain rectangular bars, as shown in Figs. 1 and 5, or various prismatic forms, with sharp or beveled edges, as shown in Figs.

indicate corre- 9, 10, 11, and 12. These bars or blanks are then cut up from one end into a series of forked sections, so that no waste of metal whatever results, as indicated by a a gg in Figs. 2 and 4 and 8, the process being very rapid and simple. .In these drawings I have shown two slightly different forms of staples, the one being of angular V form, while the other is of curved crescent shape; but in both cases it will be observed that the staples are cut at one action from it metal bars in their approximate shape, with their legs diverging, and that these legs are afterward bent parallel to complete the staple; but I do not, however, confine myself to these special shapes, nor to any special shape of staple produced according to this system, for obviously the shapes may vary considerably Without departing from this system of manufacture.

It will be observed that the angle at which the divergent legs of the staple-cuts approach the sides of the blank bar causes the desired acute angle to be produced at the enteringpoints of the staple, as indicated at f f and t; t'in -Figs. 3 and 7; and it'will be further observed that this system of cutting the staples in their'divcrgent or approximate shape from the bar enables one cut to closely succeed the other, whereas were the staples to be out into their completed shape from the bars, not only would the die or cutters have greater work to perform, but greater waste of metal would result.

It will be observed that the angular form of staple shown in the left column in the drawings, when complete, will have a flat head, I), sloping shoulders c a, straight parallel legs d d, and points f f, beveled on the outside, while the curved staple shown on the right column will have a round head, h, and legs t tapering to points, each of which forms will have particular advantages for certain purposes. It may be also noted that when the staples are cut from plain rectangular bars, as shown in the first figures, the staple-points will not taper on the broad sides; but when out from bars with beveled edges, as in Figs. 9, 10, 11, and 12 the points will also taper on one or more sides, thus becoming more insinuating and easier to drive, while the head will be quite broad, to better receive the blows of the hammer and take a wide and firm bearing on the carpet or other article against which it may be driven.

It may now be observed that not only is this mode of manufacturing staples very rapid and simple, but very economical of metal, and prodncesthe staple in complete form with very few operations, and those of a direct kind, and without much bending or displacing of the fiber of the metal. Furthermore, as these staples are entirely out from bars of metal they will possess a toughness and stiffness which will render them difficult to bend or break in driving or withdrawing, and thus render both operations more easy than is the case with bendable wire staples. Moreover, the sharp cut and burred faces of the staples will give 2. A staple cut in one piece from bar metal, I

and having a flat head, I), sloping shoulders 0 c, and parallel legs d d, substantially as herein shown and described.

CHARLES WARREN DEAN.

Vitnesses:

JAMES G. SPROAT, EDGAR ROBINSON.

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