US2806452A - Furnace nose construction - Google Patents

Description

L. S. LONGEN ECKER Sept. 17, 1957 FURNACE NOSE CONSTRUCTION 8 Sheets-Sheet l Filed Sept. 4', 1953 I l l C 'l I 1 l l I I l l 1 l l i il INVENTOR. Lew' S. Longenecker vuu, um 15M HIS ATTORNE YS Sept. 17, 1957 l.. s, LoNGENEcKER 2,806;452

FURNACE NOSE CONSTRUCTION v 8 Sheets-Sheet 2 Filed Sept. 4, 1953 .n mk Tc N 0 En Ve mw o L .w e L BY im, #CML am HIS A T TORNEYS SPt 17, 1957 L, s. LoNGENE'cKER y2,806,452

' FuNAcE: NosE CONSTRUCTION Fledsept. 4, 1953 l BShQatSf-Sheet 5 A VII IIIIII/ ,HIS ATTORNEYS Sept- 17 1957 l.. s. LoNGENEcKER 2,806,452

FURNACE NOSE CQNSTRUCTION 1 Filed sept. 4, 1955 a sheets-sheet 4 Fig.8

INVENToR. Levi 5. Longenecker HLS` ATTORNEYS Sept. 17, 1957 L. S. LONGENECKER FURNACE NOSE CONSTRUCTION s sheets-sheet 5 Filed Sept. 4, 1953 INVENToR. Law S. Longeneclrer Ym., www., 1s nllv HIS ATTORNEYS Sept. 17, 1957 l.. s. LONGENECKER 2,806,452

FURNACE NosE CONSTRUCTION Filed Sept. 4. l1953 8 Sheets-Sheet 6 INVENTR. Lew S. Longencker HIS ATTORNEYS l.. s.' LONGENECKEKR FURNAQE NosE CONSTRUCTION Sept. 1,7, 1957 8 Sheets-Sheet 7 Filed Sept.k 4, 1953 l l5 INVENT.

25 Fig/4 Levi S. Longenecker H/s ATTORNEYS BYMA., he

Sept. 17, 1957 .s. LoNGENEcKER 2,306,452

FURNACE NosE CONSTRUCTION 8 Sheets-Sheet 8 Filed sept. 4. 1953 INVENTOR. Levi- S. L angenecker Bywl c H/s ATTORNEYS United States Patent C) FURNACE NSE CONSTRUCTION Levi S. Longenecker, Pittsburgh, Pa.

Appiication September 4, 1953, Serial No. 378,566

15 Claims. (Cl. 122-6) This invention relates to an improved furnace nose construction and particularly, to a construction suitable for relatively high temperature utilizations. The invention also pertains to an improved cooling arrangement, an improved nose tile or refractory block construction, and to an improved support bracket construction and utilization with the nose block.

1n my United States Letters Patents 1,977,799 and 2,240,190, I have disclosed earlier nose furnance constructions, of which the present invention constitutes an improvement. The nose structures disclosed by these patents have proved very satisfactory under a normal rated furnace operation. However, when the furnace is pushed for greater tonnage, the embedded casting shoe tends to oxidize and become weak, thus shortening service life. At the present time, the life of the vertical support bracket or anchor post casting which suspends the refractory block or tile determines the overall life of the nose construction. Thus, if the life of the casting can be increased, the life of the structure will be extended.

Prior nose constructions were also somewhat difficult to repair due to the type of interlock involved. To insert the last nose tile in a patching operation, its tongue had to be removed and the groove packed with mortar, or else special patch tiles had to be used.

The present invention has been devised to meet the need for a longer life nose construction which will have a simplified and more practical type of mounting and which can make effective utilization of cooling means, such as a circulating water pipe.

It has thus been an object of my invention to provide a new and improved furnance nose construction which wili have a longer service life and which will better stand over-capacity operation of a furnace, such as a slab reheating furnace, an open hearth furnace, etc where rather intense heats are involved.

Another object of my present invention has been to provide an improved supporting arrangement for the nose block or tile of a furnace construction.

A further object of my invention has been to provide a simplified and more practical furnace nose construction which utilizes a new principle in mounting immediate nose blocks in position with respect to their vertical support bracket or anchor post member.

A still further object has been to devise an improved form of support bracket for employment in my construction which will co-operate with nose block in an improved manner and in a manner such that cooling medium or fluid may be introduced for the purpose of maintaining a lower ambient operating temperature.

These and many other objects of my invention will appear to those skilled in the art from the illustrated embodiment and claims.

In the drawings:

Figure 1 is a side elevation in partial section of a furnace structure employing my invention;

. Figure 2 is an end elevation on the Scale of Figure 1 ICC looking from the furnace side of the structure of Figure l and in the direction of line II-II of Figure 1; in this View, a pair of transversely-abutting longitudinal block rows are shown and blocks above the nose portion that form a vertical wall or apron are omitted for better illustration;

Figure 3 is a horizontal section on the scale of Figure 1 and taken along the line III-III of Figure 1; this figure also shows a pair of abutting block rows;

Figure 4 is an end isometric view on the scale of Figures 1 and 2 and looking from the furnace of the structure; this iigure shows a section of three abutting longitudinally-extending block rows;

Figure 5 is a fragmental end isometric fragment taken from the furnace side of the structure, on the scale of Figure l and illustrating portion of support frame structure which also provides an overhead, transversely-extending water tank;

Figure 6 is a side perspective view in elevation on the scale of Figure 1 illustrating a horizontal support bracket or casting member for a refractory roof portion of my construction;

Figure 7 is an end View in elevation taken along the line Vil-V11 of Figure 6 and on the scale of Figure 6;

Figure 8 is an isometric view of a shoulder tile or refractory block employed for the nose block of my construction, as illustrated in Figure 1 and on an enlarged scale with respect to such figure;

Figure 9 is a view similar to and on the same scale as Figure 8, showing the tile from a diiferentside thereof;

Figure 10 is an isometric view in elevation on the scale of Figures 8 and 9 showing details of the construction of a vertical support bracket or anchor post member employed in the structure of Figure 1 and taken from the outer or off-furnace side of the structure;

Figure l1 is a view similar to Figure 10, but taken from the furnace side of the construction;

Figure l2 is a side view in elevation of the vertical bracket or anchor post member shown in Figures 10 and l1 and on twice the scale of Figure 1, but on a smaller scale than Figures 10 and 11;

Figure 13 is an end View in elevation of the construction of Figure 12 on the same scale as such gure and taken from the furnace side of the construction in the direction of the line XIII-XIII of Figure l2;

Figure 14 is a top plan View on the scale of Figure 12 and of the bracket of Figure 12;

Figure 15 is a horizontal section taken along the line XV-XV of Figure 13;

Figure 16 is a side fragment in elevation illustrating the principle of mounting nose blocks of my invention and is of twice the scale of Figure 1;

Figure 17 is an isometric View of the same scale as Figure 16 and showing details of the construction of nose blocks illustrated thereby; and

Figure 18 is an end section in elevation taken on line XVIIl-XVIII of Figure 1 and on the scale of Figures 16 and 17.

In Figures l to 4, 1 have shown the furnace nose construction of my invention and how it is assembled with structural framework, roof, and apron or vertical wall portions of a furnace. In these figures, 10 and 11 represent structural framework which extends transversely of the furnace and is of the type shown in my Patent 2,240,190. The structural member 10 has a series of vertically-downwardly projecting web portions 10a located at spaced intervals therealong and defining cooling air passageways between the members 10 and 11. Beam member 11 is made up of welded I-beams to define a transversely-extending overhead water header or cooling fluid chamber and has an inwardly-projecting box bracket 12, see also Figure 5, which defines a latch opening 12a for a hanger or vertical support bracket or anchor post casting member 20 of my invention. In these figures w represents weld metal.

Also, as shown in my Patent 2,240,190, the member 11 has an fouter ange 11d-over which clamps 13 are mounted by means of bolt and nut assemblies 13a. The bolt and nut asemblies 13a project upwardly from side lug portions 15 of a longitudinally, substantially horizontally, extending roof support bracket 14, see also Figures 6 and 7. In this connection (see Figure 3,) a clamp 13 and one longitudinal support bracket member 14 is employed to carry each longitudinal row of roof blocks C. The bracket member 14 is of slightly modified construction at its interlocking end from the old construction of my lastmentioned patent to conform to its usage with the irnproved construction of my invention, but it is otherwise employed in a similar manner to the bracket member of said patent, in that hangers A are entered along its longitudinal slot 14a and engage the neck portions of refractory roof blocks or tiles C. As in said patent, filler slabs B of insulating material are utilized to fill the spaces between the neck portions of each row of tongue and groove connected refractory blocks C. The blocks C utilize my conventional tongue and groove arrangement for assembling and positioning them with each other. An inner end portion of the roof section of the structure shown in Figure 1 (adjacent the nose) is modified in accordance with my invention and end blocks 19 represent such a modified type while the end slabs 18 have a modified positioning Figures 8 and 9 illustrate the construction of modified end blocks or tiles 19 that are employed for both vertical and roof wall connections to the refractory nose tiles or blocks of my invention.

To the right of Figure 1, I have illustrated an apron or vertical wall section of the general type disclosed in my Patent 2,240,190 which also involves the utilization of hangers A, insulating filler slabs B and refractory blocks or tiles C. A filler tile or block D and a top block E are disclosed. As previously mentioned, the bottom or end tile 19 of the vertical wall or apron section is modified to conform with my present invention, see Figures 8 and 9. The bottom end slab 18' has a modified positioning.

Referring particularly to Figures 8 and 9, the end refractory blocks 19 employed to connect the improved nose block 33 of my invention are of my somewhat conventional body shape from the standpoint of the provision of a rectangular main body portion and an upwardly-projecting neck portion 19. The block, as shown particu- .larly in Figure 8, also has a conventional pyramidal or inclined edge groove 19a along its major side face to receive the conventional projecting tongue on an opposite major side face of the next abutting but fully conventional block C. Its neck 19 also has a narrow rectangular slot 19]: that is adapted to receive one leg of a conventional hanger A. Also, as conventional, the neck portion 19 of the opposite side of the block 19 is provided with T- shape defining slots 19e and 19d to receive the other leg portion of the conventional hanger, see A of Figure 1, and my Patent 2,240,190.

The opposite side of block 19, see Figure 9, has an inwardly-offset major face portion 19e forming a shoulder rest or ledge 191c at its lower end- The portion 19e receives a vertical shoe portion 24 or horizontal shoe portion 26 and the ledge portion 19jc receives fiange 24a or 26a of a claw-like shoe part of the hanger bracket or post casting member 20, sce Figures 1 and 4. The side face of the block 19 has an intermediate, transversely-extending, semicircular, open slot or groove 19g along its length to receive a rounded interlocking shoulder 33h of a group of endwise-positioned nose blocks 33. As shown in Figure l, adjacent end blocks 19 of the roof and wall sections are back-up positioned or retained in position with respect to the nose joint and its block 33 by the shoe portions or ledges 24 and 26 that extend outwardly therefrom and that, as shown segregate or isolate back por- '4 tions of the nose block from the roof and wall block sections.

In Figures 10 to 15, inclusive, I have particularly i1- lustrated the novel construction of my bracket member 20. This member has a centrally-positioned, verticallyextending box part 21 provided with a vertical bore 21a therethrough, a vertical slot 2lb therealong, and a cross entry slot 21C. The box part 21 thus serves to enter or receive hanger pieces A through its upper end cross slot 21e, so that the hangers A may be slid downwardly along slot 2lb to a proper position for supporting an end block 19 and apron or wall block C, see Figures l and 4.

The outer face of the box 21 is provided with a downturned latch portion 22 and a reinforcing rib 22a. The latch portion 22 engages within the slot 12a and latches over and within the projecting box bracket 12 of the beam member 11, see particularly Figures l and 5. This provides a vertical support for the hanger bracket 20. A pair of transversely spaced-apart and vertically-extending ribs 23 project downwardly along the back side of the box 21 to abut against an outer side of the bracket 12. The ribs 23 reinforce the construction and hold it in the proper vertical position from the engaging latch portion 22.

The shoe part of the hanger 20 is made up of a pair of spaced-apart and outwardly-projecting claw-like portions, one of which consists of a vertically-projecting foot plate portion 24 having an inwardly-projecting and transversely-extending flange 24a, and the other of which consists of a horizontally-projecting foot plate 26 having an inwardly-projecting and transversely-extending fiange 26a. As shown particularly in Figures 10 and 1l, the plate portions 24 and 26 are centrally and at their outer transverse ends, joined by diagonal portions 25 and having an angular relationship with each other. The

portions 24, 25 and 26 define a pair of windows 27 on` each side of the bracket 20. The portion 24, as shown particularly in Figure 10, has a pair of transversely spaced-apart and backwardly-projecting lugs 2S which, as shown particularly in Figures l and 4, are adapted to abut and space end slabs 18 of the slab block assembly B. The assembly B is employed to fill spacing between neck portions 19 of the end blocks 19. As a result, the end slabs 18 have an air space defining relationship with the portion 24 of the bracket 20.

The rbracket 20 also has a pair of bracing shoulder parts made up of angle arm pieces 29 which project from opposite narrow sides of the box-like part 21, diagonal portions 30 which slope -backwardly therefrom and are secured to the shoe plate portion 26, and vertical portions 31 which project downwardly from the diagonal portions 30 and are secured to the connecting diagonal portions 25 of the shoe part. As shown in Figures l and 4, the wall end slabs 18' rest upon and are spaced by portions 30 to position them in an air space defining relationship with the portion 26 of the bracket 20.

As shown particularly in Figures 6 and 7 and as applied to Figures 1 to 3, the roof support bracket or anchor member 14 has, on opposite sides of its inner end portion, interlocking upper and lower projections 16 and 17 which fit within windows 27'and match with and latch-engage the arm pieces 29 of the bracket 20, see also Figures 2, 4 and 10. Portions 16a of projections 16 rest upon or latch over a shortened bottom flange 11b of the beam member 11 to support the inner end of the bracket 14 and thus, the lower end of the bracket 20, see Figures 1 and 2.

Referring particularly to Figures 16, 17 and 18, I have illustrated the novel construction of a new form of nose block 33 which is reversible. In this connection, it will be noted that the two blocks 33 (a lower block F and an upper block G, see Figure 16) of the same construction are employed with each other, one block, such as F, being first mounted in position with it projecting ledge portion 33C in abutment with the shoe plate 24 and its pivot shoulder 33d in abutment with the ange 24a of the lower claw-like shoe portion, and with its rounded tongue portion 33h Within the complementary slot or groove 19g of the end block or tile 19 of the roof construction. Then, the ledge portion 33o of the second block G may be entered beneath the flange 26a of the horizontal shoe portion 26, shoulder 33d pivoted about the inner edge of the flange 26a, and the Iblock turned or rotated downwardly into position, see the arrow of Figure 16 and also Figure 18.

f As shown in Figure 17, each block or tile 33 has a narrow side or nose end face or portion 34 of curvilinear form which is connected to and defines apexes with a pair of narrow sides or edge faces or portions. One of the pair of edge faces or portions of each Ablock 33 has a tongue or Wing portion 36 and an offset portion (made up of portions 35C and 35d) that are adapted to interit with like portions of the other block or tile 33. The other of the pair of edge faces or portions of each block 33 has the ledge portion 33C that defines the pivot shoulder 33d to engage and interlock or latch with one of the clawlike shoe portions of the shoe part of the bracket 20.

More specifically, the interiitting wing and offset edge face portion of each block or tile 33 has a convexly rounded abutment shoulder portion 35 that is connected -by a back end face or portion to the flat or planar ledge portion 33e` of the shoe-engaging edge face portion. The portion 33C is connected through a substantially planar portion 3Sb to the wing and offset portions. The wing and offset portions, in effect, split the intertting edge face into two halves between opposed major side faces of the block 33. The wing portion 36 is defined by a concave face portion 36a and a convex portion 36h, while the offset portion is defined by a convex face portion 35C and a concave portion 35d. As shown particularly in Figure 18, the lower and upper blocks F vand G are of the same construction, but are positioned so that the wing portion of one block fits within the offset portion of the other block. That is, the wing 36 lies flush with or within the plane of one major side of the block 33, see Figures 17 and 18, and lits within the offset defined by the portions 35C and 35d of another and cooperating block 33.

The other edge face or portion (shoe interlocking face) of the block 33 has an inwardly offset face portion 33a that defines shoulder 33d with the ledge portion 33C of rectangular shape and that carries the tongue portion 3317. The tongue portion 33b is located intermediate the extent of the portion 33a and extends between opposed side faces (major) of the block. As previously pointed out, the portion 33h is adapted to lit within the groove 19g of an end block 19 of the wall or roof construction.

As shown particularly in Figure 16, after one of the edge face aligned blocks 33 has been mounted in position, the other block 33 may then be mounted by entering its pivot shoulder 33d upon the inner liange ledge of one of the shoe portions and rotating it about such ledge as a pivot point into the interfitting and interlocking relationship of Figures 1 and 18. This provides a praetical supporting and interlocking relationship of the nose block.

It will also be noted, see Figure 1, that the portions 35a of the nose blocks 33 define a transverse spacing with the shoe part of the support bracket 20, so that a cooling means or fluid pipe 37 may be positioned to extend transversely along the furnace construction to cool both the nose blocks 33 and the embedded hanger casting 20 to increase their service life. The new overlapping wing construction of my nose block or tile provides an easily attained interlock of opposed interl'ltting edge faces lor portions of an adjacent pair of blocks and makes installing and patching relatively easy. If desired, the pipe 37 may `be connected to receive circulating water from the chamber of the overhead support member 11.

As illustrated particularly in Figures 1 to 4, inclusive, the roof and apron or wall portions or sections of the furnace are spiked together by hangers A and by their tongue and groove connections. The roof and wall block structure is made up of longitudinally-extending and transversely-abutting rows of slabs B and blocks C, end slabs 18 and 18 and end 'blocks 19. The blocks C of each longitudinal row of roof and wall blocks have their major sides facing longitudinally of the furnace and their narrow sides or ends facing transversely of the furnace and are carried by the hangers A through the agency of an interlocking pair of support brackets 14 and 20 and the common loadcarrying beam structure.

VAs shown particularly in Figure 2, the nose blocks 33 of each refractory row are positioned with their narrow sides or ends facing longitudinally of the furnace and toward the major sides of the roof and wall blocks C and with their major sides facing sidewise or transversely of the construction. I have shown three sidewise abutting nose blocks 33 for each row in alignment with the major side faces of the end blocks 19 and within the transverse extent of such end blocks.

As shown particularly in Figures 2, 3 and 4, I have provided a series of transversely-abutting and longitudinally-extending refractory tile or block rows supported by individual sets of support brackets 14 and 20, so that each row is independent of adjacent rows. The mounting of the nose block 33 is such in the construction shown that one lower nose block F may be rst hung in position and then one upper nose block G may be turned into posit-ion in the manner indicated in Figure 16; this operation may be continued until all the nose blocks are assembled.

What I claim is:

l. In an improved furnace nose construction, a load member, a roof section carried from said load member, a wall section carried from said load member, a support bracket having `a portion to latch on the load member and suspend said bracket therefrom, a roof nose end block interlocking with the roof section and a wall nose end block interlocking with the wall section, a shoe part on said support bracket and having one 4shoe portion interlocking with said roof nose end block and another shoe portion interlocking with said wall nose end block, a pair of cooperating nose blocks, one of said nose blocks having a portion interlocking with said one shoe portion Iand the other of said nose blocks having a portion interlocking with the other of said shoe portions, said nose blocks having opposed pivot-abutment shoulders and adjacent interleaving wing portions, land each of said nose blocks having a pivot shoulder to pivotally engage its lassociated shoe portion and turn said block thereon into an interlocking position with said shoe part and into an assembled position with the other nose block.

2. In an improved furnace construction, a load member, a roof section carried from said load member, a bracket member carried from said load member, a wall section carried from said bracket member and having an end adjacent to an end of said roof section, said bracket member having a pair of shoes projecting into spacing between the adjacent ends of said roof and wall sections, one of said shoes position-retaining an end block of said roof section and the other of said shoes positionretaining an adjacent end block of said wall section, at least a pair of refractory nose blocks forming the furnace nose and closing-olf spacing between the adjacent ends of the roof and wall sections, said pair of nose blocks and said pair of shoes having cooperating latching and pivotmounting portions for said nose blocks, said nose blocks being positioned between said pair of shoes, and each nose block of said pair being pivotally carried with respect to each other by said cooperating portions from a cooperating one of said pair of shoes.

3. A furnace construction as defined in claim 2 wherein, the nose block of said pair have cooperating rounded edge portions :abutting each other when said blocks are positioned between land carried by said shoe portions, and the nose block of said pair have cooperating wing and offset edge portions therealong that are located ahead of sa'id'rounde'd edge portions.

4. lIn an improved furnace construction, a load member, a roof section carried from said load member, a 'bracket member carried from said load member, a wall section carried from said bracket member and having ran end adjacent an end of said roof section, said bracket member having a pair of shoe portions projecting into spacing between the adjacent ends of said roof `and wall sections, one of said shoe portions position-retaining an end block of said roof section and the other of said shoe portions position-retaining an adjacent end block of vsaid wall section, refractory nose blocks forming the furnace nose and closing off spacing between the adjacent ends of the roof and wall sections, said nose blocks being posiv'ti'oned between and being carried from said pair of shoe portions, and said nose lblocks defining a cooling uid circulating spacing along said bracket member and between said pair 'of shoe portions.

5. In :an improved furnace construction, a load member, Aa yroof section carried vfrom said load member, a bracket member carried from said load member, a wall section carried from said bracket member and having an 'end adjacent to an end of said roof section, said bracket member having a pair of shoe portions projecting into spacing between the adjacent ends of said roof and wall sections, one of said shoe portions position-retaining 'an end block of said roof section and the other of said shoe portions position-retaining an adjacent end block of said wall section, refractory nose blocks forming the furnace nose and closing off spacing between the adjacent ends of the roof and wall sections, said nose blocks being positioned between land being carried from 'said pair of shoe portions, a connecting portion connecting said shoe portions together at their inner ends, and cooling means positioned along said connecting portion and between it and back end portions of said nose blocks.

6. In an improved furnace construction, a load member, a roof section carried from said load member, a bracket member carried from said load member, a wall section carried from said bracket member and having an `end adjacent to an end of said roof section, said bracket member having a pair of shoe portions projecting into vspacing between the adjacent ends of said roof and wall sections, refractory nose blocks forming the furnace nose and closing off spacing between the adjacent ends of the roof and wall sections, said nose blocks being posijtioned between and being carried from said pair of shoe portions, said nose blocks having pivot ledge portions ylatch-'engaging on and between said pair of shoe portions, and said nose blocks having oppositelypositioned rounded shoulder portions that are rolled into abutment with each other when said nose blocks are pivotally moved on their ledge portions into a mounted relationship with each other.

7. A furnace construction as defined in claim 6 wherein, said shoulder portions are located rearwardly of said nose blocks, and said nose blocks have overlapping edgewise-extending wing portions located forwardly of said shoulder portions to interlock with each other and hold :said nose blocks in an edgewise-aligned mounted relationship between said pair of shoe portions.

8. In an improved furnace construction, a load member, a roof section carried from said load member, a bracket member carried from said load member, a wall section carried from said bracket member and having an end adjacent to an end of said roof section, said bracket member having a pair of shoe-ledge portions projecting outwardly into `spacing between the adjacent ends of said roof and wall sections, one of said shoe-ledge portions extending in an endwise-limiting relation along an end block of said roof section and the other of said shoeledge portions extending in an endwise-limiting relation along an adjacent end block of said wall section, each of said shoe-ledge portions having 'a claw projecting towards the claw of the other shoe-ledge portion, pairs of refractory nose blocks forming the furnace nose and closing-off spacing between the adjacent ends of the roof and wall sections; and each pair of nose blocks comprising, an upper nose block pivotally swung from the claw of said other shoe-ledge portion and forwardly thereof to abut the end ,block of said Wall section, anda lower nose block pivotally swung from the claw of said one shoe-ledge portion and in an edgewise-abutting and pivotally-removable relation with said other nose block and forwardly thereof to abut with the end block of said roof section.

9. A furnace construction as defined in claim 8 wherein, the one of said shoe-ledge portions extends substantially vertically along an end block of said roof section and the other of said shoe ledge portions extends substantially horizontally along an adjacent end block of said wall section, and tongue and groove connections are provided between said pair of nose blocks and said end blocks.

l0. VIn an improved furnace nose construction, a load member, a roof section anda wall section, a pair of interlocking bracket members having portions to latch over the load member and suspend one of said bracket members in a substantially horizontal position land suspend the other of said bracket members in a substantially vertical position, said roof section being carried from said one bracket member and said wall section being carried by said other bracket member, an angular-shaped shoe part on a lower end of said other bracket member and projecting outwardly to define a joint between said roof and wall sections, said shoe part having one shoe portion along lan end block of said roof section to retain the roof section at the joint, the said shoe part having another shoe portion along an adjacent end block of said wall section to retain the wall section at the joint, at least a pair of nose blocks forming the furnace nose and closingoif spacing between the end blocks of said roof and wall sections, said nose blocks having inner end portions pivotally interlatching with and between said shoe portions to move said nose blocks into and out of and hold them in a mounted relationship with respect to each other.

l1. in an improved furnace nose construction, la load member, a roof section and a wall section, a pair of interlocking bracket members having portions to latch over the load member and suspend one of said bracket members in a substantially horizontal position and suspend the other of said bracket members in a substantially vertical position, said roof section being carried from said one bracket member and said wall section being carried by said other bracket member, an angular-shaped shoe part on a lower end of said other bracket member and projecting outwardly to define a joint between said roof and wall sections, said shoe part having one shoe portion along an end block of said roof section to retain the roof section at the joint, the said shoe part having another shoe portion along an adjacent end block of said wall section to retain the wall section at the joint, at least a pair of nose blocks forming the furnace nose and closing-off spacing between the end blocks of said roof and wall sections, said nose blocks having inner end portions interlatching with and between said shoe portions to hold them in a mounted relationship with respect to each other, said nose blocks defining a spacing along and within said shoe part and between said pair of shoe portions thereof, and

cooling means positioned Within said spacing to cool said shoe part and said nose blocks.

l2. Vln :an improved construction, a load member, a bracket member having a portion to latch on the load Vmember and suspend said bracket member therefrom, said bracket member having a pair of claw-like shoe portions projecting in a spaced-apart and angular relationship with respect to each other, a pair of cooperating nose blocks, one of said nose blocks having a portion interlocking with one of said shoe portions and the other of said nose blocks having a portion interlocking with the other of said shoe portions, at least one of said nose blocks having a pivot shoulder to pivotally engage its associated shoe portion and turn thereon into an interlocking position therewith, said pair of nose blocks having opposed-rounded abutment shoulder portions for pivot movement of the one nose block into and out of a cooperating mounted position with the other nose block, complementary wing and offset portions along said shoulder portions movable into an interlocking relationship when the one nose block is pivoted into position with respect to the other, said shoe portions having a connecting portion positioning them in the defined angular relationship With each other, land said nose blocks in their cooperating positioning with each other having a spaced-apart relationship with said :connecting portion to provide for the introduction of cooling uid therebetween.

13. In an improved furnace construction employing a refractory nose block to be lreversibly mounted with another block as a block pair and a support shoe for said block pair having a pair of opposed angularly-disposed claw-like shoe portions, said nose block comprising, a refractory bodyv defining a pair of opposed substantially planar major side faces, an outwardly-curved nose end face, and a pair of side edge faces; said edge faces being connected at their back ends with each other and |at their forward ends with said nose face, one of said pair of edge faces having an edgewise-outwardly-projecting Wing portion :along one of said side faces and a substantially complementary edgewise-inwardly-ofset portion along the other of said side faces to interflt respectively with ofset and Wing portions of the body of another nose block of the defined construction to provide an edgewise-interlocking block pair, the other edge face of said body having a ledge portion defining Ia pivot shoulder to turnably engage and latch with one claw-like shoe portion of the support shoe, and both said wing and offset portions of said body being confined fully between said opposed major side faces, so that one block of a pair may be turned about the other on its pivot shoulder when block pairs of the defined construction are positioned in side abutment with each other.

14. An improved furnace construction employing a refractory block section and a pair of cooperating refractory nose blocks at one end of the block section, an integral support bracket having -a suspension part to carry said block section, said support bracket having an integral shoe part of relatively rigid construction at one end thereof and beyond s'aid suspension part, said shoe part having a pair of integral substantially rigid claw-like shoe ledge portions in an angularly-extending and substantially perpendicular relationship with each other, pivot means for said nose blocks, y,and said shoe-ledge portions having relatively rigid pivot anges to pivotally engage and interlatch with said pivot means of said nose blocks Iand hold said nose blocks in a mounted relationship.

15. A furnace construction as defined in claim 14 wherein, said shoe-ledge portions have ventilation window portions therethrough, and one of said shoe-ledge'portions has spacer lug means projecting backwardly therefrom to space said refractory block section from said pair of nose blocks and define ventilation spacing with said window portions.

References Cited in the file of this patent

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