USRE2549E - gbxut - Google Patents

Description

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Be itA known. that` I, JOHN R. GROUT, of Detroit, in -t'he county of' Wayne, and State of. Michigamhave invented certain new and usefulvlmprovenients in Reifcrbcr-.itory und other Draughtand Blast Ful-n uc'es, for

treatingmetals, which have abridgevwall, or its equivalent, and a heating or conchustion-chamber;`y and I do herebyl declare that the-following is a full, clear; and exact description of the sanie', rei`erence be ing had to thef annexed drawings, making part ofthis specification', in which- Figure 1 s-'a vertical longitudinal sectio'ni" i FigureZ is a'vertical 'transverse section through the bridge Wall.I Figure 3, asimilar section of the bridge )Vall near the melting apartment. Figure 4, a similar section of the arch overthe tire-room and'bridge wall. Figure 5 shows ,the part formingl the yvalve inthe passage-way through' the bridgev x'vnll. Figure 6 shows the corresponding parts of the valve in arch passage-ways. Figure 7, a perspectii'c View of the furnace as completed. t

The same letters are emplojed in the designation of saine parts-in the several figures. 'Myiinventien consists in so'eonstrueting and operating furnaces, otff the class described inthe title hereof, that atmospheric air is heated in traversing passagesjconstructcd for that purposein'either 'the bridge wall' orarchleoirerv'tlie,fire-chamber,'or in both, and introduced in regulated currents and mingled with thegascousl lproducts,of the' burning fuels as they enter the heating or melting-chamber of' the furnace, so `as' to eectin .the said chamber the combustion of these gases, and'at the same time, thereby,v whileincrensing vthe heat, protelef; metals tha'ufma'j be 'under tratniiittrohthe injurious 'eects of unoonsuined-gases, andlin utilising` heaty hitherto not used a nd preserving'the masonry of the furnace in thc parts connected,

In constructing furnaces with my improvements applied, I make the chimney with less powerof draught, .1 v the bridge wall of greaterthieknessgand there-ehamber of.' greater depth and arcani' gratsnrfacc than is usual..` AI also place doors, closing,r 'the chamber, below the grate-bars, as also the openingl for feeding themes,

so that the draught may be eut off when required. 'i I will now describe iny-improred' furnace, so that persons skilled in the art may construct and operate the same. The case presented in the drawings is the application of my improvements to a reverberatory. furnace. y The 'saure principle7 with modifications such. as would immcdiateiy suggest themselves, may be applied 'to other i furnaces ofth kind described in the title. I

In the drawings, A represents the. grate; B the fire-room; C the passagenvayover the bridge Wall;V I). the

l:Whcsating ornmelting-apartment, und E the flue. 'The bridgel wall-I construct .with a passage-way, through which a current of atmospheric air may' pass trom therchambcr under thegrate into theheating or melting-apartment,

entering the same froznthe bridge walilncar the top and'behind the saine, as shoningin iis. 1 and 8. The top of thepassagmimy has sueh'an ihclnation'that thc'current of air'passigng*throughl-itfaud highlyigli'eated by contact with the sides of the bridge irall", shall be projected upward and diagonallyv across the. current of the' aseous roducts of combustion ilowindfr'oinithe fire-room into the a artment D thronrvh -the assu e C, thereb .t P a, P .n P 8 y effecting their thorough ccmmingling. This passage-way is shown at ma d", in ga 1, 2, and- 3. A' similar passageway, b bf, is constructed through the arch over the Afire-roonr'andpassage C, .thronghhwliichith'e het air is discharged, as'shown infig. 1, wi th n downward inclination. These passageways may be used `concur rently or independently. They introduce the air in thin currents, ext cnd ing nearly or cntirelythe width of the passage C. These passagc-waysimay be madenyith several entering air-spaces, as shown in tige'. 2 and 3,1.

' Where the bridge-Wall passage isreprescnted as snbdiyidcd into four parts, and 4i, where the-arch passage -is shown divided into two subdivisions. .This arrangement may 'be defied as desired, preserving, howevjcl-,gthe `general principle of constrnetiom'which I prefer, of the introduction of the hot air-in thin sheet spaces through the whole width of the passage C.' The plate d is used for strengthening-the njalljonly when necessary.` The plate maj7 be 'hinged to thepl'ate cl and extended Aforwazw undenthe grate-bars. The passageof airuiinto the 1 chamber D, lin' the'inanner` described, should be subjected to the discretionary' control of' the operator, soasito admit the requisite qunntityoi"E nir.. This may beft'ected in divers ways. y Oneinqdc, which I plfe'fei', 'I'. hai/'c fallo-wn. l.Valves are placed in ithese passages at stand (f g "1)'i -espectivcly. The forni of the naiv-ein the plate, having a. sufficient opening through it for the passage of the'required curi-entl et air. 'A sliding-valve, g, rests upon this plate, on which it slides diagonally, controlled by the pins in the bottom of thc plateg,` whieh pass through diagonal slots near the en d of the platef. The ralveg isactuated by any convenientarrangcincnt of levers, h z', passing through .the furnace walls'. The same description will apply 'to-tig. '6, which is shown with two openings l.instead of one.A By means of th'cse valves either er both ofv thep'assnges may be closed entirely or they may-be vopened with exactne'ss,` more or less, as required. The 'deorsj j close .the entrance to the chambery below vthe vgrat-es, while` the openings throughwhich the fuel is intro-duced are closed in like manner. B y these doors tho draught is regulated as'des-ired. Both the currents of hot air are effective for furnishing an increased supply o f oxygen required furthe perfect combustion ofthe gaseous -products carriedo'ver the bridge wall from lthe re within the chambe- D, and either maybe used for that purpose, or both may be used,crossing theirr jets and more perfectly accomplishing the work of int-crmixiug the-air and the uneonsumed gaseous products of 'combustion. The bridgewall passage,however, ail'ordsan'advantage which cannot be accomplished by the use of l the arch passage, viz, in the desulphurzation or the oxidatiorrof the ores placed on the bottom of the chamber` which iselfected by cau-sing the admission of atmospheric air in -slight excess, which may bcaccomplishedl 'either by increasing the` supplyor diminishing the supplyfof` gaseous'products. A bridge, C, is extended across the passage-way to prevent tl1e llow of molten metal down the passage-way and orerthe valve.

I have shown one mode of onstr'uc'ting these air-passage ways, but I do not confine myself to this par ticularjarrangement.V Heretoforc a large amount of heat has been lost by radiation fronrthe walls of thc 1 furnace. The more widely the hotnir passages are distributed through the walls of the vlirerooms and ofthe `furnace, the more economical 'will bctho consumption of fuel, as the heat now lost will lie, more of it, taken up i 'by the-air and carried into the combustion or meltingchambcn It will, therefore, be desirable to carry these hotair passages uroundth'ewall more than I have shown them in thc drawings.

Another advantago-derived from this construction of furnaces will be that the external walls, relieved from the intensity of thcheat which will bc taken up by the air in` the'intermediate passage-ways, will be far more durable than those built according to the mode heretofore in use.

What I claim ns my invention, vand desire to secure by Letters Patent., 'is-4 1. In areverberatory orlother furuacefor treating lnetals, ha`ving a bridge wallor its equvalcnhund a combustion ormeltiug-chamber, the Vatmospheric passage-way c a a" through the bridge wall, so constructed that althin and `broad current or, currents offatmesphcrie air, heated iu .passing through the `wall, shall be dischar'gcd at or near the top of'ahe bridge wall', and in rear of the same, diagonally across the course of the currentsof the-gaseous products `ofi,c ourbustion on ,entering the" combustion `or meltinggchamber after passing' from thcrc-room. I,

wall, so constructed that a broad and thizr'current or currents of'atmospheric air, heated in passing through the wall; shall be discharged n .t a line overor nearly over the rear side of the bridge wall, downwardly and -diagonally across thcicourse of the current of tho 'gaseous products of combustion on entering. the combustion or-melting-chamber after passing from the fire-room.

3. In such a furnace, the combination-of an atmospheric air-passage way, constructed -through the bridge wall, with a si'nilarpassagcway through ltho arch over the same, said passagefways being respectively copstructcd substantially 'as described.

4. The'passage-waysa ai ai.or b bf bf', when constructed respectively iu the bridge wall andarch, and subdivided in such manner as to discharge the het air, as set forth, through' two 'or moreY orifices with narrow openings, thc series extending across or 'nearly across the entire width of the passage over the bridge wall.

5. Th'e atmospheric passage-ways `a a' a" and I b bf', constructed so that the air will be ht'zazited'in"passing-y through the furnacowalls, when so arranged with 'valves or other tlirottlesthat the flow of air through' thcin" 'may be l:regulated at discretion, substantially as set forth.

6- The bridge C across thc bridge wall above, the vnlve,fm the protect-ion of the'sarn'c, substantially-as- 7. Se constructing such a furnace t-halthc heat absorbed by the furnace walls .may be taken up by' Y ofair. passing through passagcnvaysconstructed-iuthe-fur:iuoownlls, which airy-flowing tlirouglrijhcmzwards discharged intotund mingled with thegaseeus products oi",eouibustion after the saine haverisenfronl the fuel upon the gratos and passed out of the lire-room, substantially :is described.

In testimony-whereof I have signedmy naine to this specification before twosubscribingf witnesses.

l JOHN; in sueur. Witnesses: It.`MAsoN,.

Jeun S. llonnmusunnu.

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