US297593A - Manufacture of split blanks - Google Patents

Description

(No Model.)

W. GARRETT.

MANUPAGTURE 0F SPLIT BLANKS.

Patented Apr. 29, 1884.

g ,1. UNITED STATES PATENT OFFICE.

WILLIAM GARRETT, OF BEAVER FALLS, PENNSYLVANIA.

. l y l MANUFACTURE oF SPLIT BLANKS.

SPECIFICATION forming part of Letters Patent No. 297,593, dated April `29, 1884.

Application filed October 19. 1883. (No modela,

and useful Improvement in the Manufacture of Split Blanks; and I do hereby declare the fol-` lowing to be a full, clear, concise, and eXact description thereof, reference being had to lhammer by a cutter.

the accompanying drawings, making a part of this specification, in which-like letters indicating like parts- Figure I is a diagram illustrating by a series of end elevations of a bloom the several changes of form undergone by the4 same in its manufacture under my invention, into a blank which is split or divided on one side; Fig. 2,

a diagram similarly illustrating the manufacture of a blank split or divided upon two opposite sides; Fig. 3, a diagram showing the production of a rod or cylinderdivided as in Fig. 2; and Fig. 4, ends View of bloomswhich are split or divided longitudinally under a My invention is designed for, the manufacture of metal blanks, bars, or rods having a split or division extending inwardly from one side or from two opposite sides, said blanks being suitable and desirable to be worked into'shovels, split keys, or cotters, Src.

To this end my improvements consist in a certain novel method of recessing and reducing a bloom to form a split blank, and ina blank having one or more lateral splits or divisions and formed from a bloom by the recessing and reduction in thickness thereof, as hereinafter more fully set forth.

In the practice of my invention I take a bloom, A, preferably of rectangular section, and, after having properly heated the same, indent or impress therein-one or more lateral gaps or recesses, athe depth of which corresponds with the depth of the split or division desired in theiinished blank. I then reduce the blank by any suitable means to the thickness required, and in the operation close together the sides of the recess or recesses after the sam'e have cooled below a welding-heat, such closed recess or recesses thus forming the desired lateral division'or divisions. y

The operation may be conveniently conducted by the ,employment of rolls in the recessing and reduction of the bloom. In such case, and referring first to the manufacture of a blank having but one lateral split or division, Ipass a bloom, as A, Fig. 1, between a pair of rolls, the lower of which is cylindrical ,and the upper provided with a collar adapted to form a lateral recess or gap, a, in the bloom, producing the section A. The bloom is again passed through the rolls, to reducethe recess a to the depth desired for the split of I the finished blank, the section on each side of the recess being left intact, and the bloom being brought to the form shown at A2. The bloom is now turned over and passed between a pair of plain-surfaced rolls, the action of which is exerted parallel with the recess a, by

which the entire section is reduced perpendicularly to said recess, as also the width, but not the depth, o f the recess, as shown at A3. This operation is continued by succes` sivepasses between the plain-surfaced rolls, asr

l in the ordinary method of rolling, the faces o the recess a being closed together in the course of the operation, as at. A5, and the bloom being continuously reduced in thickness, as at A5, A, A7, and AS, until a blank, A, of the desired thickness and having a lateral split or division, a', between the closed up sides of therecess a, is produced. Such blank, which may be made of any proper width 4and thickness, is in condition to be cut into desired lengths for the manufacture of various articles. It is to be observed that the closing of the ref cess will not cause the welding together of its sides, as the bloom is at this stage lof the operation below a welding-heat.

Themanufacture of a blank which is solid at and adjacent to its center and split or divided on two opposite sides is conducted in a similar manner, as illustrated in Fig. 2. The heated bloom A is first passed between a pair of rolls! provided withk collars of such form and' location as to form'two recesses or gaps, a a, on opposite sides of the bloom, producing a section, as shown at A10. rIhe bloom is then passed once or more through the rolls, whereby the depth of the recesses c c is first increased, as at A, and lin ally brought to the limit required, as at A12. fIhe bloom is then placed in an ordinary open square groove, or

IOO

by any other means known to the trade brought to the desired section, as shown at A, after which it is rolled ilat parallel with said recesses in the ordinary method of rolling until reduced, as shown, to afinished blank, A, of the :required thickness, and provided with a lateral split or division, a, on each of two opposite sides. The bloom A (shown in Fig. 8) is similarly recessed, and reduced, as at AW', A", A15, A", and A20, and the resultant blank thereafter rolled in the ordinary way into a cylindrical bar or rod, A, having two opposite splits or divisions, a.

In lieu of forming the recess or recesses a by rolling, as before described, the same may be made by heating a bloom, placing it under ahammer, and partially splitting or dividing itby means of a cutter, producing seetions, as indicated in Fig. 4, the recess or recesses a of which are afterward closed together when the bloom is below a weldingheat under the ordinary process of rolling or hammering.

I claim herein as my invention- 1. rIhe improvement in the art of manufacturing laterally split or divided blanks which consists in indenting or impressing in a suitably rolled and heated bloom one or more lateral gaps or recesses along the entire length thereof, and thereafter reducing the bloom to the required thickness, and simultaneously closing up the recesses thereof without welding the same, substantially as set forth.

2. The improvement in the art of manufacturing laterally split or divided metallic blanks which consists in first rolling one or more lateral gaps or recesses in a bloom,and thereafter closing up said recesses and reducing the bloom to the required thickness by rolling the same parallel with the recesses thereof', substantially as set forth.

In testimony whereof I have hereunto set my hand.

VILLIAM GARRETT.

Witnesses:

J. SNowDnN BELL, It. H. XVIIrr'rLnsnY.

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