US1544580A - Furnace-arch construction - Google Patents

Description

July 7, 192s. 1,544,580

L. H. HSBEIN FURNACE ARCH CONSTRUCTION Filed Aug. s, 1921 2 sheets-shea 1 n .lllllllllllllllllllllll llllllllllllllll'lllll lll l Y @Mmmm-Hmmmuuul l C '-lllllllllll A l() T2655: n v @MKM @j @MM M611?? July 7, 1925. 1,544,580

L. H. HosBElN FURNACE ARCH CONSTRUCTION Filed Aug'. s, '1921 2 sheets-sheet 2 @www d@ Patented July 7, v1925.

' UNITED STATES LOUIS HIHOSBEIN, OF CHICAGO, ILLINOIS,

ASSIGNOR TO M E. DETRICK COMPANY,

F CHICAGO, ILLINOIS, .A CORPORATION 0F ILLINOIS.

FURNACE-ARCH CONSTRUCTION.

Application led August 3, 1921. Serial No. 489,411.

To all whom t may concern.'

Be it known that I, LOUIS H. HosBEiN, a citizen of the United States, residing at Chicago, in the county of Cook and State of 5 Illinois, have invented certain new and useful Improvements in a Furnace-Arch Construction, of which the following is a specification. This invention relates to the arches or crowns of boiler furnaces, and particularly to the types of `such arches which are commonly known as suspended arches. The present invention resides primarily in a novel organization and arrangement of the parts constituting the arch itself With associated parts of the furnace and boiler structure. Other features of the invention reside in the novel construction of the arch itself and of the portions constituting the suspending means.

The general object of the invention is the provision of an improved and simplified construction for boiler furnaces whereby the provision of special supporting members for carrying the suspended arch is obviated, and installation and repair of the arch facilitated.

A more particular object of the invention is the provision of a novel furnace construction which obviates the necessity for the use of a special supporting member for the rear end of the arch, and which thereby saves (space in the design of the furnace and material in its construction, which permits y increase of the volume and the efliciency of the furnace and boiler by minimizing the ver-,

tical distance between the arch and the boiler tubes, and which permits the independent support of the several sections of the arch, facilitating the repairY of an injured section without requiring the complete dismantling and reconstruction of the arch.

Another object of the invention is theprovision of a suspended arch structure for boiler furnaces, which is designed for incorporation into boiler furnaces irrespective of whether they are originally designed and constructed for a suspended arch. 1

Another particular object of theinvention is the provision of a suspended arch construction designed to be supported or suspended from the tubes ofthe boiler, and so arranged as to protect the suspending and supporting portions, and to minimize poss1b1l1ty of lnjury to the arch incident to failure of any of the boiler tubes.

.A further particular object of the invention 1s the provision of a novel suspended arch construction designed to be supported from the boiler tubes and adapted to be assembled with furnaces of different design and dimensions, and adapted to be constructed in various widths and lengths.

Another object of the invention'is the provvision of a furnace construction wherein a' suspended arch is supported from the boiler tubes without imposing injurious stresses upon the latter incident to expansion or contraction of the arch.

.Another object of the invention is the provision of an improved arch construction which will facilitate assembly of the structure andfreplacement of individual refractories, and which will make possible, in lsuspended arch construction, the use of refractories of relatively small size and having minimum surface area exposed in the furnace chamber.

A further object of the invention is the prov1s1on of such a construction particularly adapted for use portions of the arch.

A further object is the provision of such a construction which will contribute to diffusion of heat from metallic supporting members, and thereby guard them against the deteriorating effects of high temperatures in the arch.

An incidental object of the invention is l the provision of an' anch structure having the various characteristics above specified, which.. may be manufactured economically and installed quickly, due to the adaptability of a single design to a variety of situations, the extensive use of duplicate parts, and the simplicity of the construction. I Y

'.Othfer and further objects of the invention catedin the appended claims, or o vious upon an understanding of the invention from the present disclosure.

While the present application is predi cated upon a disclosure of a preferred form and certain modified forms of construction, it is to be understood that the disclosure of these particular embodiments of the invenwill be pointed out hereinafter indithe art; as I am aware, and as will occur to others skilled in the art, that the invention is susceptible of embodiment in many other. `forms differing in particular Vrespects from those herein shown. j

In the accompanying drawings forming part of this specification,

Fig. 1 is a diagrammatic illustration in the nature of a part longitudinal sectional elevation of a furnace structure embodying my invention;`

f Fig.2 is a detail in the nature of a fragmentary sectional elevation taken on the line 2--2 of Fig. 1;

rig. a is a Similar detail Showing a modified form;

Fig. 4 is a detail in the nature ofl a side elevation of a hanger of the sort shown in Fig. 2 showing an alternative modication in dotted lines;

Fig. 5 is a side lelevation of a hanger bar;

Fig.l 6 is an end elevation of the same;

Fig. 7 is a diagrammatic illustration of modified construction, same being in the nature of a part sectional elevation of the arch, with tile suspension members shown in elevation; v Fig. 8 is a detail in the nature of an enlarged view of the rear end arch construction illustrated in Fig. 7 and Fig. Y9 is a detail in the nature of a frag mentary section substantially'on line 9-9 of Fig. 7.

, The construction constituting the subject matter of the present invention possesses particular utility in furnace structures wherein the boiler is of the so-called horizontal water tube type. Described generally, one embodiment of the invention contemplates an arch structure constituting the crown wall of the furnace, which arch is formed of a plurality of rows or series of iirebrick or tile, the brick in each series being suspended on an archi bar extending longitudinally of the furnace, said respective arch bars being positioned so that the tile of juxtaposed series are in contact. The forward extremities of these'arch bars are supported upon or adjacent the front wall of the furnace, while at their rearward extremities, under or adjacent the forward end of the boiler, the several arch bars are carried in a transversely extending hanger bar which, in turn, is suspended by a plurality of hangers which find support at their upper extremities on tubes ofthe boiler. The invention will beV understood more in detail by reference to the accompanying drawings, in which, in the embodiment illustrated in Fig. 1, the numeral 1 designates the front wall of the furnace, with which may be associated one or more transversely extending structural members 2, here illustrated in the form of a channel beam. The boiler front is designated by the numeral set the front header 5 4, behind which is carrying the tubes 6, all supported in customary appropriate fashions. .1t is obvious that the width of the furnace and the depth of the furnace from the front wall to the forward end of the boiler will vary in different installations, and it is one of the features of utility of my invention that it is applicable to furnaces varying in these `particulars by substitution or variation of only a minimum number of parts.

The arch itself' includes a plurality of arch bars 7 extending from front to rear above the furnace chamber. ln the embodiment illustrated in Fig. 1 each of these arch .bars is .formed as a composite structure comprisingl a front section and a rear section which are joined by a transverse key 8 passing throughV overlapping and interfitting parts of the connected sections. The bar has a hook-shaped forward extremity 9 supported upon and engaging over the structural member 2, whereby rearward movement of the bar is limited. The bar is provided throughout its length with a laterally projecting bottom fiange 10 constituting a tile retaining portion, and at its rearward.

extremity with a hook-like projection 11 constituting a tile support. For a distance adjacent its rear end, each bar is provided' along its upper margin with a laterally extending suspension fia-nge 12 which terminates at a stop member 14 disposed at the rearward extremity ofthe bar. The several bars are conjointly supported at their rearward extremities on a hanger bar 15 extending transversely of them at substantially right angles. Supporting connection of the arch bars and hanger bar: is afforded by slotted bracket members 16 adapted to receive the web of the arch bar between them and to engage under the supporting flange 12. -Abutment of the hanger bar against the stop 14 prevents its movement off of the rearward end of the arch bar. The bracket members 16 aresupported by intermediate webs 16a depending from the bottom flange 16", which, in turn, is connected to the top flange 16 by a web 16d. The hanger bar 15 .is carriedby 'ai plurality of hangers 17. Each of these hangers includes a shank portion terminating at its lower -extremity in a jaw portion 17, and at its upper `extremity in tube engaging portion 17. The jaw portion is adapted to be slid. onto the hanger bar, accomodating passage of the web 16d and engaging under the top flange 16. The

dimensions of the hanger shank and tube 'les a laterally extending vw-hich is adapted to find support upon a single boiler tube, whilein the embodiment illustrated in Fig. 3 the tube engaging portion is adapted to find support upon two juxtaposed boiler tubes. The portions of the members 17 b adapted to have engagementv with the boiler tubes are of arcuate cross contour so as to provide rocker bearing surfaces.

Each of the arch bars 7 adords a support for a plurality of tile 18 of refractory material, said tile being providedwith mar-Y ginal slots to receive the web and flange 10 of the bar, by virtue of which connection the tile of the series are held in proper alignment. The spacing of the brackets 16 on the hanger bar 15 is such that the tile on adjacent arch bars are supported in lateral contact. Tile maintained in this relationship constitute a continuous arch or crown sheets of heat resisting material.

It is obvious that considerations of econonly demand that the tile be manufactured in standard or established sizes, and that standard parts be utilized as extensively as possible in all installations. My invention contributes very materially to this desired result. Different transverse dimensions of furnaces may be accommodated by the use of more or fewer of the hanger bars 15, such as may be requisite to support the necessary number of series of tile; and proper support for the hanger bars is always afforded without special fittings, due to the fact that the hangers, whose position is' dependent upon the position of the boiler tubes, are engagej able with the hanger bar at any polnt throughout its length. Regardless of any change or variation in the spacing or position of the. hangers, therefore, the tile are always suspended in proper relationship to form the continuous arch. It is obvious that for furnaces of different lengths, arch bars 7 of different lengths must be provided. "In accommodating the structure to installations varying in this particular, the only variation necessary is in length of the front arch bar section. By utilization of front arch bar sections of proper length, and the requisite number of tile, the structure may be accommodated to any length of furnace, all the other parts being of standard sizes and construnction Variation in the elevation and angularity of the arch and the boiler tubes is accommodated by the arcuate bearing con- ,nection of the hangers and tubes, and by the extent of adjustment alforded as to the position of the hanger bar 15 upon the support flanges 12 of the arch bars.

It will be observed that by the use of the form of hanger shown inFig. 2, the structure may be supported from the 'second series of boiler tubes, in distinction to being supported on the first or bottom series of tomary use of the boiler.

For the purpose of protecting closing the front of the boiler setting and the metal parts of the arch structure and associated elements from the high heat of the' furnace, an apron wall is included as a part of the arch construction. This apron Wall includes a transverse series of cover bricks 19', each supported upon one of the hook projections 1l of an arch bar, and of proper dimension to make lateral contact with juxtaposed similar bricks. These cover bricks cover the ends of the arch barsl and close the space between them, and they further support such additional bricks 20 as may be necessary to close the space betweenthe cover bricks and the lowest series of boiler tubes, while asbestos packing 21 is utilized to fill the space about and between the lower tubes in front of the hangers 17.

In the embodiment illustrated in Fig. 7 I have illustrated certain variations in the construction. In many instances it is desirable to supply supports for the arch bars between the front wall and the boiler. In said figure I have shown such supports in the form of transversely extending channel beams 22 supported at their ends in the side walls,- and joined by the customary tie bolts 24 in cooperation with the spacers 25, and hangers 26 support the arch bars from these beams. Furthermore in this embodiment the rear end of the arch is of variant type. The rear arch bar section is in arcuate form, and is attached to the bracket 16 by a bolt 27. The hanger bar 16 is carried in jaw members 28 which are clamped between hangers 29 under retention of bolts 30. On their opposite inner faces the hangers 29 are provided with seats, in which the upper flange of the jaw member 28 may be positioned selectively to obtain the desired elevation of theV rear end vof the arch. In this construction segmental tile are supported on the arcuate rear section of the arch bars, forming the curved construction illustrated in Figs. 7 8 and 9 constitutes a distinct improvement in arch construction designed to greatly increase the term of serviceability of the tile, as well as to facilitate installation and repair. It will be recognized that the material in the arch at such a turning point, as along 'the line of convergence of the horizontal' and vertical wall portions, receives more heat than other parts of the arch, due to the passage past it of all combustion gases which are generated in the various points in front of it, and due to the fact that the material has faces exposed to the heat on two sides. Almost invariably it is this portion of the arch in which the refractory tile first have to be replaced. By my improved constructionl minimize the destructive effect of the heat on the arch by making the turn very short, so as to minimize the amount of overhang at the point where the gases tend to change direction, provide an arrangement whereby it is possible to employ small size tile economically, and a supporting arrangement which is effective to increase radiation of heat from the tile and the arch bars. Moreover the arrangement permits the use of a minimum number of tile of minimum size, so that it is necessary to demount but very few tile in order to replace those which may become injured in the portion of the arch subject to most rapid disintegration. From the last mentioned figures it will be observed that the rear end arch bar section, here designated by the numeral 40, is quite short, and extends almost directly up from the end of the front section, being connected to the latter by the wedge 8 as in the form first described. The rearward margin of the section 4() is arcuate and throughout a portion of its length the bar has laterally extending arcuate flanges 4l following said margin. The segmental tile, while of sufficient thickness to permit the turn being made with a minimum number of tile, in the structure illustrated there being three of them, are only half the width of the tile employed in the horizontal portionl of the arch. This arrangement permits the use of tile of such a small size as to increase their serviceability two or three times over the term of utility of a tile of the full width. In order to provide for the proper support of these half-width tile, as well as to afford an effective radiating means for conveying heat away from the tile and the arch bars, I employ supplemental suspension members 42. These supplemental suspension members are of a general anchor shape, and provided with transverse slots for reception of the webs and supporting flanges 10 and 41, of the arch bar members, so that said supplemental suspension members may be retained on the arch bars, while susceptible 'of movement longitudinally thereon. The supplemental suspension members have laterally extending hook portions 42a arranged to` extend in substantially the plane of the retainin flanges l() or 41 when the supplementa suspension member is positioned thereon. The supplemental suspension members also have upwardly extending arms 42b which are relatively thin and of substantial width, and which are inclined obliquely so asl to be spaced apart from the web of the arch bar when the supporting member is therein. These arms 42b will be hereafter referred to as radiating fins. The half-width tile are formed with notched corners providing upstanding suspension lugs at their thinner extremities, to afford suspension pockets 33 adapted for reception of the hook members 42, said suspension lugs being shaped to conform to the position of the radiating fins 42", the form of the half tile being such that when two of them are suspended on one of the members 42 their juxtaposed faces contact and the two are of the same aggregate width as one of the full width tile. Therefore, when thus supported in conjunction with similar series of tile on adjacent arch bars, the arrangement presents a continuous wall of refractory material. It is obvious that the supplemental suspension lmembers form anchors for retaining the half-width tile upon the arch bars, and in addition to this function, they constitute heat dispersi-ng members which are effective to conduct heat from the tile and from the arch bars and, through the medium of the.. radiating fins 42h, disperse this heat into the air above the arch by radiation. With the supplemental suspension members substantially enclosed by the tile, they would be subject to destructive overheating, but the provision of the radiating fins extending from the enclosed portions into the open air, is effective to avoid that contingency, in the manner just mentioned. The turn portion of an arch constructed in this fashion is adapted to resist the destructive influences of the heat to which it is subjected, due to the relatively small area of the individual tile exposed to the combustion gases. These various sections of f the tile are susceptible of individual movement to a limited extent, as they are freely suspended, and being of relatively Lsmall cross sectional dimensions are more uniformly affected by changes in temperature, r

and thus are not so subject to disintegration as are the larger tile heretofore employed. Moreover the construction of the turn portion of the arch in this fashion permits the reduction in number of tile included in the vertical wall, and thereby greatly reduces the number of tile which it is necessary to dismount in order to replace tile at the bottom or median point of the turn, where the erosion and disintegration take place most rapidly. By the construction of the terminal arch bar member 40 with a shelf 44 for supporting the upper tiles of the apron wall, replacement of the lower tiles may be made without removal of the upper ones. It is obvious that any of various forms of hangers or hanger bars may be employed with this rear end construction, and that a similar construction may be employed at the front end where it is desirable to provide an i nition arch between the front wall and the orizontal arch.

In the 'assembling of arches comprising the features first above described, the hangers 17 are rst placed in position on the proper water tubes and structural members, the hanger. bars 15, of proper 'number to carry the necessary arch bars are lthen threaded into the jaw portions 17a, the arch bars then mounted in the connection brackets, and the tile then hung upon the arch bars. f

A particular advantage gained by my invention is the conservationv of head room, and facility of installation and repair effected by the elimination of the structural supporting member heretofore employed at the rear end of furnace arches. In addition to requiring a very considerable vertical space, thus necessitating the lowering of the rear end of the arch relative to the boiler, such transverse supporting members, being loaded over a considerable span, are subject to sagging when overheated. As they are utilized to carry the entire rear end of the arch, the replacementof such a member necessitates the and rebuilding of the entire arch. By my improved construction, not only may any .section of the arch be repaired without requiring dismantling of other parts, but the failure of one support will not affect other than the immediate section of the arch., Moreover the rearend of the structurebeing supported at a plurality of points, on a plurality of different members, and at points where such members are directly anchored and supported,-as are the boiler tubes inthe head,the supporting parts are further adapted to sustain the weight without strain. All metal parts of the structure are effectively protected from excessive heat, and are quickly accessible by removal of a minimum number of tile. The construction permits the use ofy standard parts, with the sole exception o f the rear arch bar sections, in all installations, irrespective of the size of the arch, and the structure is adapted for incorporation into furnaces which are not designed particularly therefor.

I claim:

1.. In Aa furnace construction, the combination with furnace walls and a boiler associated therewith, of arch bars vsupported at 'their forward portions and having their rearward extremities suspended from the boiler tubes, aand refractory tile suspended complete dismantling said suspension member `to supported on tubes of the boiler and carrying said hanger bar, and tile suspended on the arch bars in association to constitute the furnace arch.

3. In a furnace construction including a furnace wall and an associated boiler, an arch structure comprising a series of longitudinally extending arch bars supported at their forward portions, a suspension member cooperating with said arch bars at their rearward extremities to maintain them in proper spacial relationship, individually adjustable hanger members connected to respective boiler tubes and conjoint-ly supporting said suspension member, and tile suspended on the respective arch bars and cooperating to form a continuousarch between the furnace wall and the boiler.

4. In a furnace construction, the combination with a furnace wall and associated boiler, of an arch comprising a plurality of longitudinally extending arch bars formed of demountably conjoined sections, said arch bars being supported at their forward portions, a suspension member connecting the rear sections of the arch bars and effective to maintain them in proper spacial relationship in alignment respectively with their associated front sections, separate hangers suspended on respective tubes of the boiler and conjointly supporting the suspension member, and tile suspendedon the several arch bars in association to afford a continuous top closure between the furnace wall and boiler.

5. In a boiler furnace an arch construction comprising longitudinally extending arch bars, a transversely extending suspension member connecting said arch bars adjacent their rear extremities, hangers supported on respective boiler tubes and constituting suspending means for said suspension member, said hangers having rocking bearing upon the boiler tubes.

6. In a boiler furnace including a tubular boiler, an arch construction comprising longitudinally extending arch bars, a plurality of hangers adapted for suspension` individually upon respective boiler tubes and shiftable longitudinally on said tubes, a transversely extending suspension member insertable longitudinally into connection with said hangers, said arch bars being insertable longitudinally into connection with find support thereon at their rearward extremities, and tile suspended on the several arch bars and contacting to form a top closure extending below the forward end of the boiler.

7. In a boiler furnace including furnace walls and a water tube boiler, an arch construction comprising longitudinally extending arch bars arranged side by side and supported at their forward portions, a plurality 10 of hangers suspended individually on rebars in association to form a ing portions, a plurality severally on respective boiler tubes, connecsupport for the latter,

tions between said hangers and the rearward ends Aof the arch bars to form a rear end on said arch bars to form a top closure wall for the combustion chamber and an apron wall between said top closure wall and the boiler.

.9. In aboiler furnace including furnace walls and an associated boiler, an arch constructiom comprising a plurality of arch bars havlng support at their forward portion and including upwardly extending portions at their rearward extremities, a plulrality of hangers supported individually on respective tubes vof the boiler, connections `between said hangers and the rear portions of said arch bars to constitute rear end supports for the latter, and tile supported on said arch bars yin association to constitute a suspended re arch and apron yvall.

10. In a boiler furnace including furnace walls and an associated boiler, an arch construction comprising a plurality of arch bars having support at their forward portions and having upwardly extending arcuate portions at their rearward extremities, hangers individually supported on respective tubes of the boiler, connections between said hangers and arch bars to afford rear end support for the latter, and a plurality of tile suspended on the arch bars in association to form a top closure for the combustion chamber and including an arcuate portion deiiected upwardly toward the boiler.

11. In a boiler furnace including furnace walls and an associated boiler, an arch construction comprising a plurality of substantially horizontally disposed front arch bar sections, a pluralityv of rear end arch bar sections having upwardly extending portions, a plurality of -hangers supported individually on respective tubes of the boiler,

connecting means joining said hangers and and tile suspendedrear end sections to afford support for the latter, means connecting the front and rear end arch bar sections, and tile suspended on said front and rear sections in association to constitute the furnace arch.

, 12. In a boiler furnace the combination with furnace walls and a water tube boiler of a plurality of arch bars, a plurality of hangers individually supported upon respective boiler tubes above the lowermost series thereof, means aording supporting connection between said hangers and arch bars, and refractory material supported on said arch bars in position to form an arch segregating said arch bars and hangers from the combustion chamber. Y

. 13. In a furnace an arch construction the combination of an arch bar formed with a supporting flange, means for supporting said arch bar, aplurality of supplemental `supporting members supported 'on said flange and susceptible of longitudinal movement thereon, and a plurality of tile supported on each of said supplemental supporting members, the tile on respective supporting members being associated to form a continuous furnace arch wally'.

14. In a suspended arch construction the combination of arch bars having arcuate supporting flanges, a plurality of supplemental supporting members retained on said flanges and susceptible of longitudinal movement thereon, and a plurality of tile supported on each of said supplemental supporting members, the tile. on associated supporting members affording a continuous arch wall having surface portions lying in different angular planes.

15. In a suspended arch, the combination of an arch bar having a supporting flange, Ia series of tile of substantially uniform width suspended on said fiange, supplemental supporting members supported on the flange and longitudinally shiftable thereon, and a plurality of tile supported on each supplemental supporting member, the aggregate width of the tile on each supporting member substantially equalling the width of the tile on the supporting flange.

16. In a furnace arch, the combination of an arch bar having a supporting flange, a plurality, of tile supported on said fiange in alignment, a supplemental supporting member supported on said flange, and a plurality of tile supported on said supplemental supportin member in alignment with said first mentioned tile. v i

17. In an arch construction, the combination of an arch bar having a tile supporting portion, a plurality of tile suspended on said portion, a supplemental tile supporting member supported on said tile supporting portion, and a plurality of tile supported on said supplementalsupporting member; said supplemental supporting member including heat radiating portions extending away from the tile and the arch bar.'

18. In an arch construction, the combination of an arch b ar having an angularly diverted part, said arch bar including said diverted part being provided with tile supporting portions, a plurality of supplemental supporting members supported on said tile support portion and the angularly diverted part, and a plurality of tile supported on eachl of said supplemental supporting members in association to form an arch wall portion, said supplemental supporting members including heatradiating portions projecting above said tile.

19. In a suspended arch, the combination of a plurality of arch barshaving upwardly diverted portions at their rearward extremities, a plurality of rectangular tile of -substantially equal widthv supported in a series on each arch bar, a pluralityof wedge shaped tile supported on the diverted portion of each arch bar in lateral and longitudinal abutment, said wedge shaped tile being of substantially one-halfthe width of the rectangular tile and shiftable relative thereto on the arch bars, said rectangular tile being associated to constitute a substantially horizontal arch portion, andsaid Wedge shaped tile being associated to constitute an arch portion in continuation 4of said horizontal portion but extending upwardly therefrom. l f

20. In an arch construction, the combina- Ytion of an arch bar having an upwardly diverted rear end portion, said arch bar and said rear end portion having tile supporting `members, -a series of rectangular tile supported on said arch bar in alignment to forml a flat arch and a plurality ofseries of wedge shaped tile supported on said rear end portion to form an arcuate continuation of said flat arch. j

21. In furnace arch construction, thecombination ofan arch bar, tile adapted to be suspended thereon to form an arch portion,

said tile having parts adapted to partially enclose the lower portion of the arch bar, tile hangers shiftably mounted on the arch bar for movement longitudinally thereof, said hangers having parts to engage the tile to support the latter on the bar and having lparts, extending clear of the tile to radiate eat.

22. In furnace arch construction, the combination of an arch bar, a plurality of tile' hangers s hiftably mounted thereon for movement longitudinally ofthe bar, tile having overhanging portions engageable von said hangers whereby the tile may be supported on the bar, and said hangers being provided with heat radiating portions extending outwardly from the tile between said overhanging portions thereof.

23. In furnace arch construction, the combination of an arch bar having a marginal flange, hangers shiftably mounted on said flange for movement longitudinally of the bar, tile mounted on said hangers with portions partly enclosing said flange, and said portions,whereby the hanger may be shiftably mounted on a support. 1

26. In a boiler furnace construction including a -water tube boiler, the combination of a plurality of arch bars having end portions adjacent the boiler, hangers sustained on the boiler tubes and supportingl said end portions, of the bars and refractory material supported on the bars in position to form the furnace arch.

27. In a furnace arch construction, in combination, an arch bar, hangers supported on respective bars and s hiftable longitudinallyjthereon, a plurality of arch tile suspended on each hanger independently, said tile being shiftable with their supporting hangers and Vremovable therefrom i-ndividuall 2y8. In a furnace arch'A construction, in combinatioman arch bar, hangers mounted thereon and shiftable longitudinally of the bar, tile supported on said hangers and having portions pocketing a margin of the bar, said hangers having parts extending beyond the ends of the. tile whereby the hangers may-be engaged to shift them and the supported tile on the bar.

29. In furnace construction, the combination of a supporting bar, tile having slotted portions to receive a part ofthe bar, and hangers supported entirely by said bar and engaging the tile to support the latter upon the former.

30. In furnace construction, the combination of a bar, tile having recessed portions to accommodate the bar` and hangers supported solely by said bar, said hangers being shiftable on the bar and engageable wlth the tile to support them thereon.

31. In arch construction,l in combinatlon, a supporting bar, tile having recessed po-rtions to accommodate portions of the bar,

= and hangers supported' entirely-by said' bar* and extending laterallytherefrom for .en-A gagement with the tile to support them on the bar, 'there being a plurality of tile on each hanger. .e

32. In arch construction, in combination,

a bar having a; marginal iiange, tile having recessed portions to accommodate the ange,

and hangers adjustably supported on the iange forengagement with the tile;

33. In furnace. construction, the combination with a supportin bar, of hangers removably supported so ely by said bar and projecting laterally lto opposite sides thereof, and tile suspended on thel hangers i. and pocketin portions of the bar, said hangers being shrftable onthe bar to accommodate movement of the tile to different elevations thereon. Y

34. As an article of manufacture a furnace arch portion comprising identical wedge shaped refractories provided at, one side of their narrower. ends with' a notched-'corner ortion and hook receiving pocket extending lnwardly therefrom and` terminating short of the converging faces of 'the refractories,

and the lateral faces ofthe refractories being parallel. i

35. An arch-construction @comprising the combination lwith the top arch, of supporting brackets arranged along a margin thereof, suspension members movably supported on the brackets at different elevations, and wedge-shaped tile suspended on the suspension members in courses terminating at the margin 'of the top arch, the tile in the respective courses being diSposededge-to-edge and V the movable suspension members'ccommo'- dating their expansion and-contraction.

3.6; an article of manufacture, an arch nose portion comprrslng complementary wedge-shaped refractori'es having parallel lateral sides-and notched innercorner portions at their narrower ends, said narrower Aendl portions -being provided with hookreceiving pockets disposed to align when the refractories are arranged with lateral faces in abutment and the converging faces in approximate alignment. I

A 37. 'An archnose construction comprising aV vertically'extending supporting bracket, tile supportingV members adjustably supported thereon at different elevations, wedge-shaped tile suspended on said supporting members and shiftable therewith relative to the bracket, said wedge-shaped tile being disposed with their convergent faces juxtaposed and their narrower ex' tremities in engagement with the supporting members.

38. In a construction of the character stated a longitudinally disposed arch bar the lower portion of which is formed upon an are of a circle, means for supporting said arch bar, laterally extended flanges upon the lower part of said arch bar also formed upon an arc of a circle, tiles ari ranged end to end and supported by said arch bar and tile hangers for engaging said tiles and said flanges.

In testimony whereof I have hereunto signed my name.

LOUIS H. HOSBEIN..

DISCLAIMER 1,544,580.-L0ws H. Hosbein, Chicago, Ill. FURNAcE-ARCH CONSTRUCTION. Patent dated July 7, 1925. Disclaimer filed November 1, 1935, by the assignee, M. H. Detrz'clc Company.

Hereby enters this disclaimer to that part of the claim in said specification which is in the following words to-wit:

13. In a furnace an arch construction the combination of an arch bar formed with a supporting flange, means for supporting said arch bar, a plurality of. supplemental supporting members supported on said ange and susceptible of longitudinal movement thereon, and a plurality of tile supported on each of said supplemental supporting members, the tile on respective supporting members being associated to form a continuous furnace arch wall. y

84. As an article of manufacture a furnace arch portion comprising identical wedge shaped refractories provided at one side of their narrower ends with a notched corner portion and hook receiving pocket extending inwardly therefrom and terminating short of the converging faces of the refractories, and the lateral faces of the refractories being parallel.

35. An arch construction comprising the combination with the top arch, of supporting brackets arranged along a margin thereof, suspension members movably supported on the brackets at different elevations, and wedge-shaped tile suspended on the suspension members in courses terminating at the margin of the top arch, the tile in the respective courses being disposed edge-to-edge and the movable suspension members accommodating their expansion and contraction.

36. As an article of manufacture, an arch nose portion comprising complementary wedgeshaped refractories having parallel lateral sides and notched inner corner portionsvvat their narrower ends, said narrower end portions being provided with hook-receiving pockets disposed to align when the refractories are arranged with lateral faces in abutment and the converging faces in approximate alignment.

37. An arch nose construction comprising a vertically extending supporting bracket, tile supporting members adjustably supported thereon at different elevations, wedge-shaped tile suspended on said supporting members and shiftable therewith relative to the bracket, said wedge-shaped tile being disposed with their convergent faces juxtaposed and their narrower extremities in engagement with the supporting members.

[Oficial Gazette November 26, 1935.]

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