US1385868A - Muffle-leer construction - Google Patents

Description

,.D. L. GEER.

MUFFLE LEER CONSTRUCUON'.

APPLICATION FILED NOV. Z5, 1919.

RENEWED OCT. 7. 1.920.

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UNITED STATES PATENT OFFICE.

PAUL L. GEER, OF BELLEVUE BOROUGH, PENNSYLVANIA, ASSIGNOR T0 -AMSLER- MORTON COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

MUFFLE-LEER CONSTRUCTION.

Specification of Letters Patent.

Patented July 26, 1921.

Application led November 25, 1919, Serial No. 340,468. Renewed October 7, 1920. Serial No;V 415,376.

T 0 all whom z't may concern:

Be it known that l, PAUL L. GEER, a citizen of the United States, and residing in the borough of Bellevue in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in Mufle-Leer Construction, of which the following is a specication.

My invention consists of new and useful improvements in muflieleers.

The objects which I have in view are, inter ala; as follows:

To provide a leer in which the gaseous products of combusti-on are brought into such intimate contact withl the walls of the Inutile that the maximum heating effect is obtained.

To provide they proper temperature gradienti from the front to the rear of t-he leer.

To provide a gas tightmule of improved construction which will allow for the necessary expansion and contraction without leak-' age or rupture.

To provide an inexpensive, yet efficient, durable and easily repaired muile. leer.

For these and other objects, l have invented a inutile leer in which the combustion of the gaseous fuel takes place under the forward end of the muftle, the products of combustion being led upwardly through vertical flues at the sides of the mulie to the crown, and' thence downwardly through reverse lues toa chamber in the rear of and separated from the combustion chamber. Thence the products are led up through iiues at the sides of the muille to the rear portion of the crown which, is separated from the forward portion of the crown by a baiie or intersecting wall, and thence `said products pass along the crown extension to the -stack in the rear of which is the tunnelwhich extends to the discharge door of the leer. The third or rear series of vertical fiues are preferably of less capacity or fewer in number than the irst and second named series to prevent too rapid passage of the products of combustion. The travel of the products of combustion is further regulated -by the stack damper, while the intensity of the heat in the combustion chamber is regulated by the air and gas valves of fthe,

burner, where a gas burner is used.

rlhe outer. walls and roof of the leer may' be of the usual fire brick construction, but

I provide for the structure of the inutile, the

flues and the crown extension special inter-` locking tiles whose joints are rendered gastight by means of plastic cement.

In theA rear of the mutiie the side walls of the leer are contracted inwardly into alinementwith the walls of the mui'le, and the alined with the walls and roof of the inutile.

In the accompanying drawings. which are merely intended'to illustrate the principles of my invention without limiting the scope of the saine to the construction shown, Figure 1 is a central longitudinal section of the Inutile portion of a leer embodying my present improvements takenalong the line I-'I in Fig. 2; Fig. 2 is a section of the same taken along the line II-.II in Fig. l; Fig. 3 is a horizontal section taken along the irregular line IIL-III in Fig. 2; Fig. 4 is a broken central longitudinal section of Athe complete leer: Fie. 5 is a section 'taken along the line V`7 in Fig. 4. showing the crownextension construction: Fig. 6 is a similar view taken along the line lll-YI in Fig. 4, showing the tunnel construction; Fig. 7 is an enlarged section taken along the line VII-VII in Fig. 2 showing the Inutile arch or roof construction; Fig. 8 is an enlarged perspective of one of the Inutile wall tiles. and Fig. 9 isa similar view` of one of the muie floor tiles.A

The following is a detailed description of the embodiment of my inventionl shown in the drawings.

The outer structure of the leer is prefer- .ably constructed of the usual fire brick sup- The gas burner E extends through the front wall of the combustion chamber and 1s provided with a gas valve 7 and an air valve 8.

The mufHe D is supported by the wing walls 9 extending inwardly from the side walls 2 of the leer and vertical piers 10.

The side walls of the muffle D are formed by vertically disposed wall tiles 11 having inner and preferably paneled faces 12 and rearwardly extending vertical edge flanges 13 which when the tiles 11 are assembled on r the wing walls 9. as shown in the drawings.

to forni the walls of the mufiie'. extendoutwardly into contact with the walls 2 of the leer. rl`he tiles 11 span the spaces between thewing walls 9. and thus the flanges 13 form lwith said wing walls vertical flues 14 in the sides of the muiile. The floor of the mulfle is composed of floor tiles 15, tongued and `grooved at their edges to interlock', the edges of the outside tiles' interlocking with an undercut portion of the tiles 11. as 'shown edges are provlded with depending lips or anges 19 which fit into the flanges 1 8, and

so support the roof tiles in place.

The joints between the tiles are filled with a plastic cement 20 to make an expansble but gas-tight union. For this purpose. I prefer to use a mixture of 25% of silicate of soda and T57( of low grade fire clay. thus obtaining a cement whichfuses at about 1600 Fahr.

The front of the leer and of the nmtlie is closed by the' front wall 21 through which the burner E extends into .the ycombustion chamber 4. A door or doors 22 closes the front of mutiie D, while 23 is a peep or cleaning hole leading into the front end of the crown flue and normallyclosed with a suitable closure. y

2-1 is a vertical'baiie intersecting the crown flue at a point abovethe chamber At the rear of the Inutile Dpthe walls 2 of the leer contract into line with the side walls of the mutfle and are provided with inwardly projecting abutment tile having inclined tongued and grooved faces which support the roof arches for the crown extension. In the rear of the crown'extension B the roof of the leer is lowered to form the tunnel C whose side walls and roof are substantially alined with the side walls and roof of the niuifle. The stack F is mounted on the leer at the rear end of the crown extension.

It is evidentthat the firsty series of vertical flues 11, in front of t-he back wall 6, are up flues; that the next series of flues 14 in front of the baffle 21 are down flues. and the flues 14 in the rear of the baffle 2-1 are up flues.

Thus the products of combustion travel upwardly from the combustion chamber around the mufl'le. thence back along the crown flue and thence down around the mutiie into the chamber 5 and thence up around the muflle to the crown flue and thence rearwardly along the extension of the crown to the stack.

It is thus evident that the entire length of the muffle is completely enveloped by the products of combustion, the heat gradually lessening from the front to the rear, and the intensity of the heat and the travel of the products of combustion being adjustable `with nicety by means of the burner valves and stack damper.

My leer is much simpler, and less expensive in construction than the types of inutile leer now in use. My leer is not damaged by expansion and contraction due to temperature changes, nor will such changes result in the entrance of sulfur or other injuriousfumes into the interior of the inutile. The tile construction is so designed as to be of remarkable strength and durability. and quick and easy repairs are made by the substitutionof new tiles when necessary.

Although, `for the sake of clearness of illustration of the principles of my invention, 1- have` minutely described the embodiment of the same shown in the accompanying drawings, I do not wish to limit myself thereby, but claim lbrpadly 1. A mutiie leer comprising an outer furnacestructure. an elevated mufHe mounted therein` alongitudinal/crown flueabove the Inutile. a combustion chamber under the forward portion of the Inutile. a reverberatory chamber under the rear portion of the muffie. a vertical wall separating said chambers. a baile wall intersecting the crown flue above the reverberatory chamber, a series of vertical flues on either side of the muiiie connectf ing the combustion chamber with the crown flue; a second series of vertical flues at either side of the muiiie, and in rear of said fi'rst named flues, connecting the crown flue in front of the baiiie wall with the reverberatory chamber. a third series of vertical flues. in the rear of said second named flues. connecting the reverberatory chamberwith the crown flue in the rear of the baffle wall7 and means for leading off the products of combustion from the rear end of the lcrown flue. whereby the products of combustion ascend from said combustion chamber about iso saidmutlle to the crown Hue, thence descend from said crown Hue about said' muHle to said reverberatory chamber, and thence ascend from said reverberatory chamber about said Inutile to the crown Hue in the rear of said baille wall.

2. A inutile leer comprising an outer furnace structure, an elevated muHle mounted therein, a longitudinal crown Hue above the mullle, a combustion chamber under the forward portion of the muille, a reverberatory chamber under the rear portion of the muille, a vertical wall separating said chambers, a baille wall intersecting the crown Hue above the reverberatory chamber, a series of vertical Hues on either side of the muHle connecting the combustion chamber with the crown Hue; a second series ofv vertical Hues at either side of the muHle, and in rear of said Hrst named Hues, connecting the crown Hue in front of the baille wall with the'reverberatory chamber, a third series of vertical Hues, in the rear of said second named Hues, connecting the reverberatorv chamber with the crown Hue in the rear of the baille wall,

said third named Hues having a combined capacity less than that of the second named Hues, and means for leading off the products of combustion from the rear end of the crown Hue, whereby the products of combustion ascend from said combustion chamber about said muille to the crown Hue, thence descend from said crown Hue about said muHle to said reverberatory chamber, and thence ascend from said reverberatory chamberl about said muille to the crown Hue in the rear of said baille wall.

3. A muHle leer comprising an outer furnace structure, an elevated muHe mounted therein, a longitudinal crown Hue above the Inutile', the side walls of the outer furnace being contracted in the rear of the muille into alinement with the side walls of the latter to form a tunnel and the crown Hue being extended beyond the rear end of the muHle, a combustion chamber under the forward portion of the muffle, a reverberatory chamber under the rear portion of the muf- He, a vertical wall separating said chambers, a baffle wall intersecting the crown Hue above the reverberatory chamber, a series of vertical Hues on either lside of the muHle connecting the combustion /cham'ber with the crown Hue; a second series of vertical Hues on either side 4of said Inutile, and

"in the rear of said Hrst named Hues, connecting the crown Hue with the reverberatory chamber, and a third series of vertical Hues.

on either side of said muille, and in the rear of said second named Hues, connecting the reverberatory chamber with the crown Hue in the rear of the baille wall, whereby the products of combustion ascend from the combustion chamber to the crown Hue, thence descend from the crown Hue to the reverberatory chamber, and thence ascend from the reverberatory chamber to the crown Hue in the rear of said baille to escape to atmosphere.

4. A inutile leer comprising an outer furnace structure, an elevated muflle mounted therein, a longitudinal crown Hue above the muille, the side walls of the outer furnace being contracted in the rear of the muille into alinement with the side walls of the latter to form a tunnel and the crown Hue being extended beyond the rear end of lthe mu e, a combustion chamber under the forward portion of the muiHe, a reverberatory chamber under the rear portion of the muH'le, a vertical wall separating said chambers, a baille wall intersecting the crown Hue above the reverberatory chamber, a series of vertical Hues on either side of the mufile connecting the combustion chamber with the crown Hue, a second series of vertical Hues on either side of said muHle, and in the Vrear of said first named Hues, connecting the crown Hue with the reverberatory chamber, and a third series of vertical Hues on either side of said mulle, and in the rear of said second named Hues, connecting the reverberatory chamberY with the crown Hue in the rear ofthe baille wall, said last named Hues having a combined capacity less than that of the second namedHues, whereby theproducts of combustion ascend from the combustion chamber to the crown Hue, thence descend from the crown Hue to the reverberatory chamber, and thence ascend from fthe reverberatory chamber to the crown Hue in the rear of said baille to escape to atmos-` phere. y,

5. A mulle leer comprising an outer furnace structure, an elevated mutlle mounted therein, a longitudinal crown Hue above the `muHle, the side wall of the outer furnace being contracted in the rear of the muille into alinement with the sidey walls of the latter to form a tunnel and the crown Hue beingextended beyond the rear end of said mutHe and for a portion of the length of said tunnel, a combustion chamber1 under the forward portion of the mulle, a reverberatory chamber under the rear of said muHle, a vertical wa'll separating said chambers, a baille wall intersecting the crown Hue above said reverberatory chamber, a series of vertical Hues of either side of the muHle connecting the combustion chamber with the crown Hue, a second series of Hues, in the rear of said first named Hues, connecting the crown Hue with the reverberatory chamber, a third series of Hues, in the rear of said second named Hues, connecting the reverberatory chamber with the crown Hue in the rear of the baHle wall, and a stack connected to i the rear end `of said crown Hue, whereby the products of combustion ascend from the combustion chamber to the crown flue, thence descend from the crown flue to the reverberatory chamber, and thence ascend from the reverberatory chamber to the crown flue in the rear of said baffle wall to escape through said stack.

6. A muffle leer comprising an outer furnace structure, an elevated muffle mounted therein, a longituidnal crown flue above the mufile, the side wall of the outer furnace being contracted in the rear of the muflie into alinement with the sidewalls of the Vlatter to 1form a tunnel and the crown flue being extended beyond the rear end of said muffle and for a portion of the length of said Itunnel, a combustion chamber under the forward portion of the muffle, a reverberatory chamber under the rear end of said muffle, a vertical wall separating said chambers, a baffie wall intersecting the crown flue above said reverberatory chamber, a series of vertical fiues on either side of the mufiie connecting the combustion4 chamber with the crown flue, a secon-d series of fiues, in the rearL of said first named flues, connectingr the crown flues with the reverberatory chamber, a third series of flues, in the rear of said second named flues, connecting the reverberatory chamber with the crown flue in the rear of the baffle wall, said last named flues having a less combined capacity than that of the second named fiues, and a stack connected to the rear end yof said crown flue, whereby the products of combustion ascend from the combustion chamber to the crown flue, thence descend from the crown flue to the reverberatory chamber, and thence ascend from the re- Verberatory chamber to the crown flue in the rear of said baffle wall to escape through said rta-ck.

`7. In a mufi'le leer construction, 'side wall tile for the muifie having front faces which fit together to lform the muflie wall surface and rearwardly extending vertical edge composed of spaced apart arches provided.

with laterally extending trough fianges and Vthe intervening spacesbeing filled to comi plete the roof with roof tile having inwardly extending flanges along their opposed edges which flanges are seated in the trough fianges of the roof arches.

10. In a muffle leer,'a muffle roof struct-ure composed of spaced apart arches provided with laterally extending trough flanges, and the intervening spaces being filled to complete the roof with roof tile having inwardly extending flanges along their opposed edges which flanges are seated in the trough flanges of the roof arches, the trough flanges of the roof arches being provided with al filling of plastic material to form a gas-tight joint.

11. In a muffie leer, a muiiie roof structure composed of spacedapartarches provided with laterally lextending trough flanges, and the intervening spaces being filled to complete the roof with roof tile having inwardly' extending flanges along their opposed edges which flanges are seated in the i trough flanges of the roof arches, the abutting edges of said roof tile being provided with tongue and groove connection.

12. In a muffle leer, a muli'le roof structure composed of spaced apart arches provided with laterally extending trough flanges, and the intervening spaces being filled to complete the roof with roof tile having inwardly extending flanges along their opposed edges which flanges are seated in the trough flanges of the roof arches, the abutting edges of said roof tile being provided with tongue and groove connection, and the joints of said structure being packed with plastic cement to render the same gas-tight.

13. A side wall tile for `leer mufiles provided with a plane face and two rearwardly extending vertical edge flanges, substantially as and for the purpose set forth.

14. A side wall tile for leer muffles provided with a plane face and two rearwardly extending vertical edge flanges, the edges of said tile being tongued and grooved for in- -terlocking with each other, substantially as and for the purpose set forth.

15. A roof arch tile for leer muffles having laterally extending trough flanges to supportv the roof` tile, the arch tile being longitudinally curved vsubstantially as and for the purpose set forth.

16. A roof arch tile for leer muffies having laterally extending trough flanges to support the roof tile, the arch tile being longitudinallycurved and their ends being tongued .and grooved to interlock with each other,

substantially as and for the purpose set i forth.

17. A roof tile for leer muflies curved to fit the arch and having edge flanges to engage the roof arches, substantially as and for the purpose set forth.

18. A roof tile for leer muffies curved to fit the arch and having edge fianges to engagethe roof arches, the abutting ends of the roof ltile being tongued and grooved to interlock together., 'substantially as and for the purpose set forth.

` 19. .A floor structure .for the muie of a Inutile leer comprising Wing Walls extending piers between the ends of opposed Wing 10 inwardly from the side Walls of the leer, Walls, and flat floor tile'supported on said piers between the ends of opposed Wing Wing Walls and piers, the abutting edges of Walls, and flat Hoor tile supported on said said floor tile being tongued and grooved to Wing Walls and piers, substantially as and interlock together, substantially as and for for the purpose set forth. the purpose set forth. V 15 20. A floor structure for the muffle of a Signed at Pittsburgh, Pa., this 24th day muHe leer comprising Wing Walls extending of November, 1919.

inwardly from the side Walls of the leer, PAUL L. GEER.

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