US1893898A - Furnace - Google Patents

Description

Jan. 10, 1933.

FURN

Filed Dec. 22. 1930 H. C. JURS AGE 3 Sheets-Sheet H. c. JURS Jan. l0, 1933..

FURNACE 1930 3 Sheets- Sheet Filed Dec 22.

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INVENTOR H. C. JUS

Jah. 10, 1933.

FURNACE Filed Dec. 22.l

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Patented idan. 10, 1933 fr:- Y e. runs, or staunen, on'ro rnnnaon Application filed necember 22, 193).l Serialkto. 503,90?.

The present invention relates broadly to furnace structures, and more particularly to mue furnaces of the type especially adapted for enameling processes.

f ln the art of euameling, itis essential that the combustion gases be maintained outl or" contact with the articles being enameled, for the reason that contacto such gases with the enamel coating -objectionably discolors .the same. The diculties o satisfactorily operating combustion furnaces has led to attempts to substitute electrically heated furn `naces in which the problem of discoloring gases does not exist. mile such furnaces have satisfactorily performed their intended duty, they have been open to the objection of extremely hi h cost of operation. p llt is one of t e objects o' the present invention to provide a furnace of improved 2@ construction eective for 'maintaining kthe combustion gases out of contact with the enameled articles. ltis also one ot the objects or the invention to provide a furnace ot such improved construction that more ecient heating and therefore a lower fuel consumption is obtained.

ln the accompanying drawings l have shown for purposes ot illustration only, a preferred embodiment 3@ the drawings:

Figure 1 is a horizontal longitudinal sectional vievv'throu h a furnace constructed in accordance with t e present invention;

Figure 2 is a transverse sectional view on l @t the une n n of. Figure i, looking in the direction of the arrows; and

Figure 3 is a vertical longitudinal sectional A View on the line III-IH 'oFigure 2, looking in the direction ofthe arrows. l

In accordance with the present invention there is provided a suitable, base 2 of concrete Y or similar material from which- side walls 3 and 4, and end walls 5 and 6 extend upwardly to, thev desired height. The side walls 4and the end walls 6 are preferably solidly built up of lire brick, and being enclosed by thev air sealed insulating Vside walls 3 and end walls 5, constitute an outer furnace shell free' lfrom sprung arches, as hereinafter pbinted oi the invention. ln

out, and form a rigid insulated chamber within which the mue proper is constructed.

Formed in the lire brick bottom 2 is a combustion chamber Qfwithin which is mounted a series oi piers 10 of suitable size, hei ht and 55 number for supporting a refractory oor 11. This Hoor is herein illustrated as comprising a series of individual sections'having inter fitting joints 12 to insure a substantially tight door such as to prevent the dow of combus- 50 tion gases from the combustion chamber 9 into the tiring chamber 8.

YExtending through the walls at suitable points are burner openings 14 adapted to lsupply the gas or oil or'combustion pur- 65 muiiies is herein illust-rated as comprising a plurality of suitably superimposed sections, all oii the'sections' being located physically within the ring chamber and spaced from the walls thereofso as to provide a free ra- 8@ diating surface entirely therearound. At their upper ends they underlie and support a suitable refractory structure 16, preferably of fire-brick, having formed therein a horizon"- tal flue 17 which, as illustrated in Figure 3 of 85 the drawings, communicates at one endv with.

a stack opening 18'. ,l 1

` The refractory structure 16 being carried directly by the upper ends of the muiiies 15,

is free to Vmove up or down vthereon and there- 'byffollow dimensional changes in the length of the inutiles-caused by heating and cooling thereof,'while alwa sretaining an operative relationship therewith. The bottom Wall of the refractory structure 16 is formed-with a 95 series of Vopenings 19., each of which` is'in'substanti'al alignment :with one of the mui'es so as to permit the same to freely discharge into the horizontal flue 17.

At one side, thevv refractory structure 16 10 bears against one of the side walls 4: whereby it is guided during its vertical movements. At its upper portion a fire briclr section protected by insulating brick 21 stops loss of heat from' the due structure 16, thereby maintaining a uniformly heated tiring structure, and preventing contraction and subsequent cracking due to non-uniform ternperature conditions.

Extending between the refractory struc tures 16 is a roof 22 comprising a plurality of individual refractory tiles or blocks of the general construction illustrated in Figure 3 of the drawings. From this figure it will be apparentthat alternate transverse rows the refractory blocks are formed with supporting shoulders 23 and suspending projections 24. These suspending projections may be engaged between channels 25 suitably secured to longitudinally extending beams 26 carried at one end by a transverse support 27 bearing at its ends on the walls 3 and 4c forming the outer shell of the furnace, and at its opposite end directly in the end shell. These channels serve in turn to support the alternate rows of blocks. The intermediate rows are formed with ribs or flanges 28 adapted to engage the shoulders 23 on which they are supported. It is thus possible to provide a flat top type arch eliminating the difficulties of usual sprung arch construction, and consequently the troubles inherent inthe satisfactory maintenance of such types of roofs.

' Within the" ring chamber the bottom 11 may carry a seriesofarticle supports 29 on which theenameled articles rest during the ring operation.

`From the foregoing construction it will be apparent that I have provided a muifle type furnace in which the mules 'are physically located within the firing chamber so as to 1ncrease the radiating surface andconsequently the efficiency of the' furnace structure. These mules are in turn effectively insulated to cut down heat losses, and are prevented from discharging their contents into the firing chamber by reason of the refractory structures 16 which are carried thereby in a floating relationship so as to always maintain the desired gas conductin relationship therewith. To those skilled 1n theart it will be apparent that the buck stays 30, illustrated more particularly in Figure 1, which may in turn be Stayed or tied together in any usual manner, are effective for reinforcing the entire furnace structure. If desired, a light metal casing 31 may be provided intermediate the buck staysand the Walls 3- and '5 for further insulating and reinforcing the furnace shell.

The provision of the flat roof intermediate the refractory structures and suspended from the shell of the furnace also constitutes an adforming a firing v forming the top of sald chamber, a combusinvention and serves to satisfactorily confine the refractory structures 16 during their vertical movements.

While I have herein illustrated and described a preferred embodiment of my invention, it will be understood that the drawings are illustrative only and that changes in the construction, operation and contour of the parts may be made without departing either from the spirit of my invention or the scope of my broader claims.

I claim:

l. In a furnace of the inutile type, a series of walls defining a tiring chamber, a flat type roof forming the fop of said chamber, a floating fine structure intermediate saidi'oof and walls, and inutiles carryingsaid flue structure.

In a furnace of the mulfle type, walls defining a firing chamber, a series of muiles within said chamber and spaced from said walls, and a floating flue structure-carried by said mufiles and into which the mufiles of the series open.

3. In a furnace of the mulile type, walls forming a firing chamber, a combustion chamber below said firing chamber, a gastight floor intermediate said chambers, muliles Within the firing chamber communicating at their lowerends with the combustion chamber, and a floatin flue structure carried by said muliles at -t eir upper ends and into which said muiiles open.

4. In a furnace of the mullie type, Walls forming a firing chamber, a flat type roof forming the top of said chamber, a combustion chamber below said firing chamber, a gas-tight iioor intermediate said chambers, muiles Within the firing chamber communieating at their lower ends with the combustion chamber, and a floating flue structure carried by said mufles at their upper ends, and intol which the mules open.

5. In a furnace of the Inutile type, walls forming 'a firing chamber, a combustion chamber separate from said tirin chamber, a gas-tight partition separating said chambers, mufles within the firing chambers communicating at one end with the combustion chamber, a floating flue structure carried by sald muiesyat their ends opposite the combustion chamber, said flue structure having openings therein communicating with the adjacent ends of the muies. y

6. In a furnace of the mule type, walls chamber, a flat type roof tion chamber separate from said firing chamber, mules within the firinO chamber communicating at the lower ends with the combustion chamber, anda .floating flue struc-rr ture intermediate said roof and walls carried by said mules at their upper end, said flue structurehaving openings therein communieating withthe openings in the upper ends of the mules.

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A25 at their upper ends, said iue structure having 7.Inamuiet efurnace,achamber having op osite sie walls, a roof structure interposed etween the side walls and spaced therefrom, a iue in the space between the top `and side wallsv and servin to closesuch space, and a plurality of m es provldmg columns for supporting ysaid iue mdepend- Y Y' ently of the topand side walls.

8. In a muilie t pe furnace, a chamber having opposite side walls, a roof structure interposed between the side walls and spaced therefrom, a flue in the space between the top and side walls and serving to close such space, and a plurality of muiiies providing columns for supporting said fiue independently of the top and side walls, said chamber having a bottom and a combustion chamber` below the bottom communicating with said mulies.-

9. In a furnace of the muiile #ty a bottom 2o combustion chamber, a series o mufiies ex- 4 tending vertically and all communicating at o ne end with said vcombustion'chamber, a flue structure common to a plurality of said muies and directly supported by the mules a plurality of openings into and throu which saidlmuiiies dischar e, and a stack into which said flue structure ischarges adjacent' the upper portion of the furnace.

In testimonyV whereof I have hereunto se my hand.

v HENRY C. JOBS.4

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