US1601485A

US1601485A - of chicago

Info

Publication number: US1601485A
Authority: US
Publication date: 1926-09-28
Anticipated expiration: 1943-09-28

Description

Patented Sept. 28, 1926.

UNITED STATE tec ies PATENT OFFICE.

LYLE STOCKTON ABBOTT,OF CHICAGO, ILLINOIS. ASSIGNOR TO CHICAGO FIRE BRICK COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FURNACE-ARCH HOLDER.

Application filed December My invention relates to furnace arch holders and more particularly to a furnace arch holder that yieldingly holds the refractory blocks or bricks in position.

It is customary to make the roofs of certain furnaces, such as malleable iron furnaces, air melting furnaces and the like in segmental form so as to permit a port on of the roof to be readily moved for charging the furnace. Because of the high temperatures prevailing in a furnace of this character, the said roofs must be constructed of a refractory material. What is known in the art as bung brick is ordinarily used for this purpose. These bricks or blocks are proportioned so as to form an arch and are held together inarched form by means of clamps or holders of metal, each holcer or support being used for holding one row of such bricks or blocks in position. The roof is composed of a series of such rows supported in the manner referred to above, the rows extending transversely across the furnace.

Due to the fact that the refractory blocks or bricks are con'iparatively thin, there is considerable radiation of heat from the bricks, which are mounted under the support, toward said support, causing said support or clamp to become heated and to expand during such heating to a considerable extent beyond the ordinary length thereof, when the parts are cool. As a re sult, when the bricks are fitted into the support or holder tight enough to prevent the same from falling out when cold, the bricks or blocks will be placed under a considerable pressure when the same are heated as these heat up more rapidly than the metallic parts which are at a greater distnacc from the area in which combustion is tak ing place, which pressurecauses the life of the brick to be shortenedand often causes distortion of the brick.

It is a purpose of my invention to provide the holder or supporting member for the bricks or blocks with means the bricks or blocks so as to clamp the same in position and at the same time permit the same to expand due to yielding of said chunping means as the parts become heated. The yielding means is such that the same 21, 1925. Serial No. 76,776.

will adjust itself as conditions in the furnace change and as the various parts of the device become heated so that the bricks or blocks will always be clamped firmly in position without any undue pressure being exerted between the bricks or blocks.

The means preferably comprises a pair of members engaging the end bricks or blocks of the row and carried by means longitudinally movable along the supporting member together with means foryieldingly moving said brick or block engaging mem bers toward each other to yieldingly hold the blocks or bricks in engagement with each other and with the supporting member.

It is a further purpose of the invention to provide resilientmeans, preferably com pression springs, for accomplishing such yielding engagement of the block or brick engaging members with said bricks or blocks and to provide means for adjusting the compression of the springs to suit various conditions.

It is a specific purpose of the invention to provide pivot-ally supported shoes engaging the end bricks or blocks which are carried by slidable members mounted on the supporting members, said slidable members being urged toward each other by the resilient means and the pivotally mounted shoes being so mounted as to engage the bricks or blocks flatly under all conditions. As the expansion of the bricks or blocks is not the same throughout their thickness from the exposed side thereof to the side thereof adjacent the supporting member, the angular position of the face of the brick in engagement with the shoe varies during the time that the parts are in place and the furnace is in operation. The pivoting in such a manner that the shoes flatly engage is accordingly of great importance, as it pro vides for a more uniform pressure between the various bricks or blocks and betweenthe end bricks or blocks and the shoes, thus also more uniformly distributing pressure throughout the individual bricks or blocks, which of course, increases the life thereof.

Other objects and advantagesof my invention will. appear as the description of the accompanying drawings proceeds. However, I desire to have it distinctly understood that I do not intend to limit myself to the V exact details shown or described, but that I intend to include as part of my invention all such obvious changes and modifications of parts as would occur to a person skilled in this art and as would tall within the scope of the claims.

ln the rawings: V

1 is a side elevation'of one of my improved arch holding members with the bricks or blocks in place thereon;

2 is a section taken on the line of Fig. 1. on an enlarged scale; and

Fig. 3 is a section taken on the line 33 of Fig. 1. on an enlarged scale.

7 Referring in detail to the drawings my improved holder comprises a supporting member 10 that is made in the form of a T- shaped casting having: an upstanding wel ,portion 11 and laterally extending flanges 12. The underside of the member 10 is curved in one'direction so as to form an arch-like or slightlyconcave lowerface 13, said lower face being straight across transversely, as will be obvious from Fig. 27 The entire member 10 is curved along somewhat similar lines as would be evident from Fig. 1.

Mounted on the opposite ends of the member 10 are the brackets 14, the same being secured in position by means of the bolts 15 or any other securing members extending through the flanges 12 of the member 10. The bracket members 14 are provided with bores 16 therein within which are slid ably mounted the blocks or followers 17. The position of the blocks or t'ollowers 17 is adjustable by means of the set screws 18 extending through the ends of the brackets 14 and screwthreadedly eno'a nine; therewith. A projection 19 is provided on each of the blocks 17 around which engages one end of the coil spring 20, the other end of which este-nds around a p t jection 21 provided on the block 22, there being; two of said blocks 22 provided on the member 10. The blocks 22, as will be evident from Fig. 2. are pro vided with flanges 23 embracine the tiana'es 12 whereby said members 22 are slidahly mounted on the member '10. The downward extensions 24 on the members are provided with grooved socket portions 25 into which the partly cylindrical projections 26 on the shoes 27 extend. The shoes 2? are thus pivotally mounted on the members which members 22 are in turn slidablv mounted on the flanges of the member 10.

Mounted in engagementwith the smooth under face 13 of the member 10 are the refractory blocks or bricks which collectively form an arch, as will be clear from Fig. l. The bricks 28 are arranged in a row along; the member 10 as *ill be evident from the drawings and the shoes 27 the faces 29 of the bricks 28 at the ends of the row, said engagement being always substantially flatwise due the fact that the pivot ot the member 27 is substantially midway between thelower exposed faces :30 thcrcot and the faces 31 in engagen'ient with the member 10. 5

In assembling the device. the members. 22 are first mounted in position. utter which the brackets ll ari secured in place. then in order to assemble the r j torvblocks with the member ltl the screws '18 are turned out to their fftlll cfltlllt permittinir the members 22 togethenwith the pivotallv mounted shoes 27 to be spread apart so that the infractorv blocks or bricks 28 can readily be placed in position with their edges 31 in eng ao'ement with the lower face 13 o! the ircmlier 10. The screws 'i i are then moved inwartly, forcing); the blocks or Followers against the Sl'lllllllffs 21 nnl thcv are compressed to such an extent that the s idablc members 22 will be moved to such a position that the shoes 27 will clamp the roiapof bricks 28 between the same. The spi'in irs fll are only compressed to such an extent by adjustment of thenieinbers 18 as to slight lv more than counteract the end thrust ot the blocks 28 forming the arch when cold and when in the position they assume when in the furnace. The lock nuts 32 provided on the members 18 are then tightened to hold said men'ibers 18 in adjusted position.

A pluralitv ot the holders with their refractory blocks clamped in position thereon are then assembled in adjoining relation on the furnace. The heating (it the furnace causes the expansion not only of the bricks or blocks 28, but of the supporting); member 10 as well. Due to the diilcrcuce in char acteristics of the material of the bricks or blocks 28 and of the member 10. howcrer, and due to the radiation of heat from the supporting member 10. there is a cmisideu able 'di'lliercnce in temperature. between the inner faces 30 of the bricks or blocks 25% and the outer faces 31 of said bricks or blocks. liurthermore. due to the di Terence in the coetiicientof expansion between iron and refractorv materials. there is a variation in expansion between the rcliactorv material and the iron supporting member. which variation furthermore varies depending on the. rising or falling of the temperature in the furnace. All these factors (nicratiinr to-- pgether causes at times a flattening of the arch and consequently. a. change in the angle of the face. 29 of the end. ones of the bricks 2 This, however, is compensated 'lor due to the pivotal niountinir otthe shoes 21' on the members Due to the location of the pivotal axis of the shoes 2?, the pressure of the shoes is equallv distributed on the end bricks at all times. Furthermore. when the expansion of the rc'tractory arch is greater than that of the su rporting member ill, the

ltlll '28, these could be dispensed with slidable members 22 are forced further apart, thus compressing the springs 21 to a greater extent. a

It will thus be seen that all adjustments necessary to prevent undue pressure on the refractory members 28 and to prevent the same from dropping out of 30Slti0i1 are made automaticallydue to the construction of the holder and are not de vendent on the attention of a furnace attendant.

ll hile the member 10 is described as being a casting, it can obviously be made in any other manner and the particula rape can be varied as desirec, the important feature being that the members 22 are longitrd nally movable thcrealong. The members are so made that the undercut grooves provided between the body portion thereof and the flanges 23 are large enough to allow for a certain amount of play between the flanges 12 and the member 22 and further- -more the extent of the flanges 23 such to allow considerable play between the web 11 and the ends of the flanges, this being desirable because of the changes in the size of the parts due to heating of the same when in position on the furnace:

It will also be obvious that while the pivoted member onshoe 27 desirable to obtain the highest efficiency fr j'il dev ce and to obtain a construction that causes the least possible damage to the bricks or blocks if desired, and the slidable members 22 could have their substantially flat forward faces 38 directly engaging with the blocks 28.

Having thus described my invention, what I desire to claim and secure by United States Letters Patent is: i

1. In a device of the character dcsc a supporting member, a plurality of ie: tory blocks lying side by side and engaging said supporting member and mca for yieldingly holding said blocks in eng g ment with each other comprising a'pair of members slidably engaging said supporting member and means for yieldingly urging said slidable members towardsaid blocks.

2. In a device of the character descrn an arched supporting member, plurality of refractory blocLs lying side by side and engaging the under side ofsaid supporting member and means for yieldingly holding said blocks in engagement with each other in arched form comprising a lair of members slidably engaging said supporting ii nher and means for yieldingly urg if mid slid-able members toward said blocks.

3. In a device of the character deecril d, an arched supporting member, a plurality of refractory blocks lying side by side and engaging the underside of said supporting member and means for yicldingly holding said blocks in engagement with (Moi other in arcned form comprising a pair of 111G111- here slidably engaging said supporting mem- 3G1 and means for yieldingly urging said slidable i'neinbers to 'ard each other to hold said blocks in engagement with each othe and with said supporting member.

4-. In a device 9f the character described, a supporting member-having laterally extending fiaz j s, a PlllTRl y of refractory blocks lying side by side and engaging said supporting men'iber and means for yieldingly holding said blocks in engagement with each. other coniprisin2 a pair of members embracing the flanges on said supporting or ueldmgly urging member and means said last mentioned members other.

5. In a device of ti e character described, an a'ched supporting member having laterally extending flanges, a plurality of refractory blocks lying side by side and engaging the flanges on said supporting memher and means for yieldingly holding said blocks in engagement witi each other in arched form comprising a pair of members embracing the flanges on said supporting member and means for yieldingly urging said last mentioned members toward each other.

6. In a device of the character described, a supporting member, a plurality of refractory blocks lying side by side and engaging said siujaporting member and means for yiadingy holding said blot-4s in cngs ment with each other comprising a p '4 members slidably engaging said suppoi member and res nt means yield'n tv urging said slidable members toward said blocks.

Y. In a device of the cter described, a supporting member, plurality of rcfactory blocks lying side by lo and engaging said supporting men her and means for yieldingly holding said blocks in ment with each other comprci. g a pair of members slidably eng said supporting member and conu'ircssion springs for yieldingly urging said slidable members toward said blocks.

8. In a device of the che or described, a supporting member, a plurality rcfractory blocks arranged in a row yieldingly in engagement with each other 11 toward each 9;

arch formation comprising members engaging the end blocks of said row, resilient means for yieldingly urging said members toward each other and means embodying a sliding connection and a pivotal connection for mounting said last mentioned members on said supporting member.

s 10. In a device of the character described, a flanged supporting member, a plurality of refractory blocks arranged in a row along said member and means for holding said blocks yieldingly in engagement with each other in arch formation comprising members engaging the end blocks of said row, resilient means for yieldingly urging said members toward each other and means embodying a sliding connection and a pivotal connection for mounting said last mentioned members on said supporting member.

11. In a device oi the character described, a supporting member, a plurality of blocks arranged in a row along said supporting member and means for supporting said row of blocks in arch formation from said supporting member comprising means on said supporting member engaging the blocks at opposite ends of said row, the means at least at one end of said row comprising a member bodily movable longitudinally of said supporting member, resilient means for yieldingly urging the same toward said row of blocks and tiltable means on said longitudinally movable member engaging the end block of said row adjacent thereto.

12. In a device of the character described, a supporting member, a plurality of blocks arranged in a row along said supporting member and means for supporting said row of blocks in arch formation from said supporting member comprising means on said supporting member engaging the blocks at opposite ends of said row, the means at least at one end of said row comprising a member slidable on said supporting member and resilient means tor yieldingly urging the same toward id row of blocks.

13. In a device of the character described, a su iiporting member, a plurality of blocks arranged in a row along said supporting member and means for supporting said row of blocks in arch formation from said supporting member comprising means on said supporting member engaging the blocks at opposite ends of said row, the means at least at one end of said row comprising a member slidable on said supporting member, resilient means for yieldingly urging the same toward said row of blocks, and a shoe engaging the end block of said row adjacent thereto pivotally mounted on said slidable member.

In a device of the character described, a supporting member, a plurality of blocks arranged in a row along said supporting member and means for supportingsaid row of blocks in arch tEorination from said supporting member comprising means on said supporting member engagingthe blocks at opposite ends of said row, the means at least at one end oi said row comprising a member slidable on said supporting member, resilient means for yieldingly urging the same toward said row oi blocl-Ls. and a shoe engaging the end block of said row adjacent thereto pivotally mounted on said slid able member so as to engage flatly with said block at all times. '7

15. In a device of the character described, a supporting member, a plurality oi blmfks arranged in a row along said supporting member "and means for supporting said row of blocks in arch formation from said supporting member comprising a pair of menu bers mounted for longitudinal movement on said supporting member, means on each oi said last mentioned members engaging the end blocks of said row and means for yieldingg ly holding said last mentioned means in engagement. with said end blocks.

16. In a device of the character descr bed, a supporting member, a plurality 0 blocks arranged in a row along said supporting member and means for supporting said row of blocks in arch formation from said supporting member comprising a pair oif members mounted for longitudinal movement on said supporting member, means on each ot said last mentioned members engaging the end blocks of said row, said hlock eugagi:

means being mounted to engage said bloc flatly at all times and means :ior yieldiugiy holding said block-engaging means in engagement with said end blocks.

17. In a device of the character de cribed. a supporting member, a plurality of blocks arranged in a row along said supporting member and means for supporting said rou of blocks in arch formation from said sup porting member comprising a pair of menu bers mount-ed for longitudinal movement on said supporting member, means pivot-ally mounted on each oi said last mentioned members engaging the end blocks of said row and means for yicldingly holding said block-engaging means in engagement with said end blocks.

18. In a device of the character de ribed. a supporting member, a plurality oi blocks arranged in a row along said supporting member and means for supporting said row of blocks in arch formation from said sup porting member comprising a pair o' f menu bers mounted for longitudinal movement orsaid supporting member, means on cru-h oi said last mentioned men'ibers engaging the end blocks of said row and resilient means for yieldingly holding said block-engruginir means in engagement with said end blocks.

19. In a device of the character described, a-supporting member, a plurality of blocks ltlU arranged in a row along said supp rting member and means for supporting sa d row of blocks in arch formation from said sup porting member comprising a pair of mem bers mounted for longitudinal movement on said supporting member, shoes pivotally mounted on each of said last mentioned members engaging the end blocks of said row and means for yieldingly holding said shoes in engagement with said end blocks.

20. In a device of the character des a supporting member, a plurality of .iloclrs arranged in a row along said su'ppurting member and means for supporting said row of blocks in arch :tormation "from said supporting member comprising a pair of members mounted for longitudinal movement on said supporting member, slices pivotally mounted on each of said last mentioned members engaging the end blocks of said ing member, means for yieldingly urging said slidable members toward said blocks and means for adjusting said last mentioned means.

In a device of the character described, a supporting member, a plurality of refractory blocks arranged in a row along said member and means for holding said blocks yieldingly in engagement With each other in arch formation comprising members engaging the end blocks of said row, adjustable means for yieldingly urging said members toward each other and means embodying a sliding connection and a pivotal connection fo mounting said last mentioned members on said supporting member.

In a device of the character described, a supporting member, a plurality of blocks arranged in a roW along said supporting member and means for supporting said row oit' blocks in arch formation from said supporting member comprising a pair 0r members mounted for longitudinal movement on said supporting member, means on each of said last mentioned members engaging the end blocks of said TOW'ZLIlCl adjustable means for yieldingly holding said block-engaging means in engagement With said end blocks.

In witness whereof, I hereunto subscribe my name this 7th day of December A. D,

LYLE STOCKTON ABBOTT.