US149865A - Improvement in the manufacture of bessemer steel - Google Patents

Description

w.n.`10NEs.f Manufacture of Bessemer Steel. VN0Qll1f9,865,` l Patented AprilZL-IBM.`

` Eg# 4 p e g @g2 WI'VIEEEES u y e 1 v jm@ @1V/59d@ BraddocksFielth in the countyT of Allegheny sprue-core for the removal of the sprue or other suitable material, having a central open- UNrrED STATES PATENT OFFICE.

WILLIAM R. JONES, OF BRADDOOKS FIELD, PENNSYLVANIA.

IMPROVEMENT IN THE MANUFACTURE OF BESSEMER. STEEL.

Specification forming part of Letters Patent,No.,149,S65`, dated April 21, 1874; application iled April To all whom 'it may concern:

Be it known that I, WILLIAM R. JONES, of

and State of Pennsylvania, have invented a new and useful Improvement in Manufacture of Bessemer Steel; and I do hereby declare the followingto be a full, clear, and exact description thereof, reference being had to the accompanying drawing, forming' a part of this specification, in which- Figure l is a vertical section .of the pit and sprue-ask, vertical core-bar, &c. Fig. 2 is a vertical section of sprue-flask; Fig. 3, view showing mode of connecting the vertical sections; Fig. 4, section of the pouring-cup; Fig. 5, core and centering-plate for forming the pouring-cup; Fig. 6, detached view of the plate for centering the Vertical core-bar and sprue-liask; Fig. 7, method of attaching flask to ingot-molds; and Fig. 8 the refractory disk for forming close joints between sprue-flask and ingot-mold.

My invention relates to the method of mold ing and making centerfsprues in the manufacture of Bessemer steel; and consists, first, in the method of forming the outer shell or flask of the sprue in longitudinal sections, which may be separated for the removal of the sprue, and providing said iask with flanges for bolting it to the mold; second, in the construction and mode of forming the pouring-cup, and in the form of the upperk end of the sprue, the cup and sprue being faced to iit; third, in the means provided for fastening the vertical core-, bar and centering the sprue-fiask; and, fourth, in minor details of construction hereinafter more specitically set forth.

' Heretofore sprues have been built of light red brick, surrounded by an outer shell; and the disadvantages arising therefrom have been loss ofV time in constructing the sprue, waste of material, and the necessity of breaking the quarrying ont the bricks.

A designates the pit, which is in all respects of the usual construction, with this exception, that the bottom B is a plate of cast-iron, or

ing, for purposes herein specified. G is a disk, provided with an annular depresslon, c, and a central opening. The purpose of the annular depression is for centering .the sprue-liask, as

will be hereinafter described. The disk O is bolted to the base B of the pit in a suitable manner. D indicates the sprue core-bar, the lower end of which is shouldered, passes through the central. opening of the disk C and bottom plate B, and is firmly secured in place by a key passing through the slot in the lower end of the core-bar, or other suitable means.

E indicates the sprue-flask, made in longitudinal section, and provided with trunnions c, or other suitable devices cast thereon, to permit of ready handling. It is also provided with projections c', through which pass bolts for securing the sections together. F represents a flange or flanges, cast upon the ends of the shell E, for the purpose of boltin g the vertical sprue to the in got-mold. In forming the spruemold, the sections of the shell E being properly clamped together by means of the bolts and the inclined wedges or keys g, the shell is placed over the core-bar D, as shown in Fig. 1, and centers itself with the core-bar by the end of the shell entering the annular depression c in the disk C. The ends of the shell and the annular opening, and, in fact, all the joints, should be properly faced so as to obtain the result specified. The shell being in the position described, the lining L, whichA may be of suitable plastic material, such as ground nrebrick and fire-sand, is rammed in place. M represents the pouring-cup, which is a conical casting, and is lined in the following manner: 'm is a disk, having an annular raised portion surrounding a central opening, said annular portion having an inner diameter about equal to or a little larger than the smallestqdiameter of the cone-shaped pouring-cup. In this raised annular portion the cup is placed centering itself,

and the central cup-core N, formed with a proj ecl tion, n, which enters the central opening of the disk m, is placed in lposition, the intervening space between the core N and the cup M being lined with plastic material, by ramming, the same as the sprue. T represents a fireclay disk, having a central opening, preferably made in the form shown, which I interpose between the end of the sprue and the ingotmold for securing those joints. The sprue,

having been formed as above described, is attached to the in got-mold l? by meansof bolts the openiI-igs f of the iiange F of the sprue. The pouring-cup M being in position in the top of the sprue, the cast'mg is duly made. In removing the sprue, the inclined Wedges g may be Asimply loosened, so as to allow slight lseparation between the longitudinal sections of the spine-mold, the sprue being drawnrout and broken olf, in lengths re quired, while in a heated and brittle condition. The usual vent-holes are, of course, provided.

rIhe advantages of` these devices over those in ordinary'u'se are thereadiness and rapidity Wit-li which a sprue may be formed, whereby time is saved; the small amount of material required in its construction, whereby Waste of material is avoided; and the readiness With which the sprue may be removed.

Having thus described my invention, what I claim is 1 .1. The sprne mold or ask, made in longitudinal sections, having trunnions, and provided with flanges for securing the same to the ingot-mold, substantially as described.

2. The detachablepouring-cup M, constructed as described, in combination with the spruelask E, substantially as specified.

3. The refractory disk T, as and for the pur- 4. The combination of the sprue-mold E, the disk C, and core-bar D, as and for the purpose specified.

5. The combination of the disk m, provided with the raised ring and central opening, and the cup-core N, as and for the purpose specilied.

In testimony whereof I, the said WILLIAM R. J ONEs, have hereunto set my hand.

Witnesses: WILLIAM R. JONES.

JAMES I. KAY, F. W. RITTER, Jr.

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