US1391197A - Open-hearth-furnace door and frame - Google Patents

Description

G. LAW.

OPEN HEARTH FURNACE DUUR AND FRAME.

APPLICATION man JuL-Y 15, 1920.

1,391,197, Patentedsepnzo, 1921.

2 SHEETS-SHEET- I.

@Wm/nap G. LAw.

OPEN HEARTHl FURNACE DOOR AND FRAME. APPLlcATloN r'lLED JULY x5, |920.

1,391,197. Pamdsepn 2o, 1921.'

2 SHEETS-SHEET 2.

UNITED STATES" PATENT OFFICE;

(molten LAW, 0F YORK, PENNSYLVANIA.

oPEN-HEARTH-EUENACE noon AND FRAME.

. Application led July 15,

To all LU/wm t may Concern.'

Be it known that I, GEORGE LAW, a citizen of the vUnited' States, residing at York, in the county of York and State of Pennsylvania, have invented certain'new and useful Improvements in Open- I-Iearth FurnaceY Y Doors and Frames; and I do declare the following to be a full, clear, and exact descr1ption of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to water-cooledr frames and doors for furnaces, ydesigned more particularly for use in connection with furnaces of the open hearth type, employed in metal smelting.

The principal objects of this invention are to provide an arched water-cooled frame formed of sections secured in the door opening of the furnace in a novel manner which renders them readily removable foryrepairs or renewing; to connect the sections'of the arched frame in a manner to prevent iame from licking through the joints between them and between the frame and door; and

vto provide the vertical legs of the frame with rearwardly diverging inner sides, thereby allowing the usual `metal supply bucket to swing from side to side for equally distributing metal in the furnace and permitting withdrawal of said bucket without catching on the legs, asnow often occurs.r

`With the foregoing in view, the invention resides in the novel construction and combination of parts hereinafter described and claimed, the descriptive matter beingA supplemented by the accompanying drawings, forming a part of this specification.

Figure 1 is a front elevation of aportion of an open hearth metal furnace equipped with my improved door and door frame.

Fig. 2 is a top plan view of the door and door frame showing the furnace wall in horizontal section.

Specification ofLetters Patent. Y Patented Sept. 1921- 192e. serial No. 396,395.

the numeral' 1 desgnatsa portion of an open hearthv metal furnace, said furnace v "having a rectangular door opening2 whose lower side is provided with the usual or any preferred dead platel 3 which projects forwardly fromt-he furnace wall as shown forl instancev in Figs. 2 and 4. Extending across the upper end ofthe opening 2 and supporting' the portion of the wall above said open-V ing, is a horizontal beam 4 which is preferably of the channeled type illustrated mostL clearly in Fig. 4, although itv will bek understood that said beam might be of other cross sectional shape if desired. This beam not only supports the portion of the wall 1 over the opening 2', but it serves as the principal anchoring means for the detachable water-` cooled frame for the opening 2.v

The'door frame above mentioned, as illustrated most clearly in Figs. 4, 5 and 6, comprises two inverted L shaped sections 5 being in contact with the vertical sides of the opening 2, `while the horizontal reaches 7 of the vtwo sections which reaches form Y. 'the crown of the arch, bear againstl the up# per edge wall of the opening, the free ends of said reaches being in abutting relation with each 'other` as shown in Figs. 2 andrG. These abutting ends are provided with an interitting bead and groove 8 and 9 respectively,which not only hold said ends against relative inward and outward'movement, but

n prevent flame from licking through the joint between the two sections.l The parts 7 of the frame section 5 are secured together at able way, but the upper sides Vof these parts are 'by preference connected ina different manner, namely by bolting the upturned ends 12 of the longitudinal angle-irons 13 together, as indicated at 14. One flange of the angle-iron bars 13 is secured to the frame section by rivets, whilethe other flange is embedded in the wall 1as shown clearly in Fig. 4,fthereby serving as means for partially anchoring the upper ends of the frame sections.

-which jointly form an arched vdoor frame, .the vertical sides or legs 6 of said frame vtheir lowerY sides by means of bolts 10 passf ing through angle-irons 11 which are secured to said parts by welding or in any other suit- The upper and lower halves of the back walls 15 of the reaches 7, lare horizontally offset as shown most clearly in Fig. 4, thereby providing a horizontal ledge 16 and a vertical wall 17 rising therefrom, these parts 16 and 17 jointly forming a seat which snugly receives the beam 4L above described.

YBoth sections 5 are bolted to this beam as shown at 1.8 in Fig. 4 and it will thus be seen that at their upper ends, said'sections will be rigidly held in place, but may be readily "detached whenever one or both of the frame v sections should be removed for repairing or renewing. To secure the lower ends of the sections 5 in place, the legs 6 are provided withl forwardly extending feet 19 which are f secured by bolts 20 to the dead plate 3.

To permit the usual metal supply bucket "(not shown) to be swung freely from side to side when it is inserted through the openingr of the-door'frame, and to prevent catching ywardly diverging relation throughout their width as shown at 21 in Figs. 3 and 6. This construction is also of advantage in effecting ,pouring of the molten metal from the fur- 'filled at all times with water. `supplied through pipes 22 leading to the nace.v When the frame comes in contact with the molten metal, it would begreatly injured,

vwere it not forV thefact that the sections 5 are of hollow formation andare completely Cold water is lower ends of the legs 6 and as the water is lheated within the frame, it is withdrawn through pipes 23 rising from the upper ends of sait frame. Vents 211 rise from both sections of the frame to allow the escape of any v'gsteam which might be'fornied therein, and (for the purpose of resisting any internal pressure which may be'created, the front and back sides of the V,two frame sections are `connected by appropriate stay-bolts 25.

In connection with the frame structure i above described, I prefer to employ a verti- V cally sliding hollow door 26 mounted at the outer side of the frame in suitable guides 27 and adapted to be raised and lowered by a chain 28 or any other adequate means. Cold water is fed to the bottom of the door 26 through appropriate water inlet pipes 29, the hot water is carried from n said door through pipes 30, and vents 31 are employed to allow the escape of steam, since such steam i is formed froml the terific heat, even though both the outer and inner Sides of the door are prefei'ablyrlined with lire clay, as indi-4 V cated at 32.l

Attention may here be directed to the fact that the doorA 26vfits rather tightly against the outer side of the door frame, the connecting means between the several sections of the door and frame.

said frame being such as to interfere in no manner with'r thiscontact, thus preventing the escape of any flame and gases between The interior of the furnace may be viewed whenever necessary through the peep-pipe 33 which is normally closed how-everdby an appropriate damper 34. vFrom time to'time, when sediment collects in the hollow door and frame, such sedimentl may be withdrawn by removing the screw-plugs 35 and draining all water from the door and frame.

By constructing my invention in the novel manner shown and described, it willv be highly efficient and in every way desirable, and I therefore prefer to employ the several details disclosed. Nevertheless, it is to be understood that within the scope of the invention as claimed, numerous minor changes may well be made.

I claim: g The combination with a metal furnace having a rectangular door opening; of an arched water-cooled door snugly in said door opening, the crown of said frame having the upper and lower halves of its back wall offset horizontally, forming a horizontal ledge extending forwardly from the upper edge of said lower half and a vertical wall rising from the front edge of said ledge, said ledge and wall jointly providing a right-angular seatjeX- tending throughout the length of' said crown,

a rigid beam snugly received in said seat frameY fittingv and anchored at its ends in the furnace wall, means rigidly securing said vertical wall to y -said beam to reinforce said crown;v said crown being transversely divided at its central point into two sections, a pair of vangle iron bars extending longitudinally along the upper edges of'said sections and having vtheir inner ends bent to form upstanding lugs disposed in contact with each other, means securing said lugs together, one flange of each angle iron bar being secured to said crown vwhile the other flanges ofsaid bars are embedded in the furnace wall, a pair of relatively short angle iron bars having horizontal flanges extending transversely of and secured to the lower edges of the aforesaid crown sections, said bars having vertical flanges in contact with each other,v Vand means securing these vertical anges together. A y

In testimony whereof I havel hereunto set myv hand.

GEORGE Law.

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