US1063575A - Refractory brick arch for locomotive-boiler furnaces. - Google Patents

Description

G. B. MOORE. REFRACTORY BRICK ARCH FOR LOGOMOTIVE BOILER FURNACES.

APPLICATION FILED SEPT. 23, 1908. I 1,063,575 I Patented June 3, 1913.

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G .-B. MOORE. I REFRAOTORY BRICK ARCH FOR LOGOMOTIVB BOILER FURNACES.

APPLIUATION FILED SEPT. 23, 1908. i

1,063,575 Patented June 3,1913. I

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CHARLES BREARLEY MOOI RIE, 0F, EVANSTON, ILLINOIS, .ELSSIGNOR, BY MESNE ASSIGN- MENTS, TO AMERICAN ARCH GOMPANY OF NEW YORK, N. Y., A CORPORATION 0F NEW Yuan.

REFRACTORY BRICK ARCH. FOR. LOCOMDTIVE-BOILER FURNACES.

resents.

Specification of Letters Patent.

Patented June 3, 11 313.

Application filed September 23, 1908. Serial No. 454,351.

To all whom it may concern.

Be it known that l, CnAIiLns BunAnnnr' Moore, a citizen of the United States, and a resident of Evanston, Cool; ominty, Illinois, have invented certain new and useful linprovements in Refractory Brick Arches for Locomotive-Boiler Furnaces, of which the following is a full, clear, and exact descrip tion.

My invention. relates to innirovenients in locomotive boiler furnaces and has special reference to improvements in refractory ball'lcs or deflecting walls, commonly ailed arches, for the lire boxe's of locon'iotive boilers. I

This invention is akin to that which disclosed and claimed in my copending application Serial No. @4348, filed of even date herewith.

The general objects of my ii'ivention are,

to provide an improved refractory arch which may be easily and quickly installed in locomotive lire boxes; to provide an arch which shall be of comparatively light weight and low cost; to provide an arch. which shall be adapted for easy repair. and parts of which may be I'Ql'l'lOVQtl to afford easy access to the fire box sides and line sheet; and to prov1de an arch of a form that will niatern ally assist in admixing and igniting the fire box gases and other combustibles.

The special object of-my invention is to provide an improved arch of the character here outlined which shall be adapted for use in locomotive fire boxes that-are equipped with arch supporting tubes.

Still further objects of my invention will appear hereinafter. I

My invention consists in the seyeral i111- provements, the various constructions, and the combinations of parts, hereinafter set forth and particularly pointed out in the appended claims; and will be readily understood upon reference to the accompanying drawings in which I have illustrated a structure which in'a preferred form cinbodies the several features of my invention. In. these drawings, which form apart of this specification: Figure 1 is a plan view of a tire box containing a refractory arch embodying one form of my invention, the crown sheet of the fire box being broken away to disclose the arch; Fig. 2 is a sectional ,viewon the line X-,X of Fig. 1; Fig.

them before they pass into the fines.

is a sectional view on the line vYY of Fig. 2, viewed in the direction of the arrows; Fig. 4- is a sectional detail on the line ZZ of Fig. j

My invention may liccinbodied in arches of varying details of construction and location in the lire box. 1 have herein confined the illustration of the invention to so-called refractory frontarches which extend from side sheet to side sheet of the file box and.

which ractically abut the firebox line sheet, but desire that it shall be understood that my invei'ition is not confined or liniited to this specific form of arch.

(i represents the grate of the fire box. The

rear sheet contains the fuel door 8. The lines 7 lead forward from the flue sheet.

9, 9 are suitablypositioned longitudinal arch supporting tubes, the same being in clined rearwardly and upwardly from the flue sheet 3. As usual tl'iey extend. from the lower part of the flue sheet to'the upper part of the rear sheet at and serve to increase the circulation of water between the front and rear water legs of the boiler.

A so-called front arch usually occupies arr-inclined position in the frontpart of the.

fire box, its lower end closely approaching or being in substantial abutment with the lower part of the llue sheet. Its cities is to prevent the direct How of the gases and coinbustible particles from the grate to the lines and to force them toward the rear end and side sheets of the tire box and thus cause active combustion to take place throughout the length of the fire box, the object being to insure the uniform distributitui of the heat to the walls and crown sheet of the fire box. An arch or battle which is composed of refractory material-attains the n'iaxiinum temperature of the fire boi; and performs the further office of igniting gases and particles which might otherwise escape imconsumed.

A particular object of my invention is so to improve the arrangement and construe tion of refractory arches that the same shall better perform the function of diverting and admixing the gases and comhustibles within the'fire box and the function of ignition i tlns end I build my arches of a number of refractory parts so disposed or arranged as to present a large superficial area or ignition surface and also to enhance both the retard .shapes, and assemble them in a way to secure these advantages and others herein mentioned.

A special feature of my invention resides in a refractory arch which occupies an inclined position in the fire box, and is made up of two principal kinds of bricks, the one kind being supporting bricks or spans that are supported by the arch tubes 9 and which are separated by considerable spaces, and the other kind being cbver or panel bricks that rest on the supporting bricks and'substantially and practically close the spaces between them. Irrespective of the form of the top of an arch of this construction, its under side obviously presents a plurality oi surfaces which occupy different planes and positions and form deflecting walls and mixing cavities which are of such extent and capacity that they materially enhance combustion within the fire boXa As explained hereinafter I add to the effectiveness of the panel supporting bricks or spans by extending them downwardly beneath the tubes that support them. I make thesupporting bricks, members, or spans, of sutlicient strength to support their own weight and the weight of the superposed cover bricks. The sizes of the spans or supporting bricks and the disposition thereof in the firebox are determined by the positions of and the distances between their points of support in the fire box, 2'. e. the spacing of the arch tubes 9 and the distances between the sides of the box and adjacent tubes. In all cases the several supporting and cover bricks, as herein shown, should be small enough to be handled easily, andwithout difliculty passed through the furnace door. As the cover or panel bricks have no weight to support and are subjected to little, if any, strain they may be both thin and light. Another reason for this is that the cover bricks are farthe heavier supporting bricks which rest on the tubes, and the cover or panel bricks, which are in a great measure relieved from the scouring action of these particles, are practically as long-lived as the supporting bricks.

In consequence of the employment of alternate light and heavy bricks, the total weight of an arm embodying my invention is considerably less than that of an ordinary arch of the same over-all dimensions. lieing made up of small units or members my arches may be put up and taken down with little expenditure of time and labor. Another advantage pertaining thereto is that the small, light, marginal bricks may be easily removed when work is to be done upon the side sheets or the flue sheet or the stay bolts of the fire box. Two other advantages are inherent to .the structure described, namely; to a considerable degree, the arch is flexible, that is, being composed of parts which have small areas of opposing contact one with another, it readily adjusts itself to the walls of the fire box and to any movement thereof which is occasioned by variations of temperature; and, second, the joints formed by the overlapping supporting and cover bricks do not fuse to the extent which causes an ordinary arch soon to become substantially rigid mass or structure. These features and advantages'are preserved in that form of my invention which is illustrated. in the several figures of the accompanying drawings; wherein the bricks (1', o are the refractory sustaining spans or members which are first positioned upon the tubes 9 in the fire box, and the refractory bricks Z) are the covers or panels which are later placed upon the supporting members. Several lines of bricks o extend across the box and the panels likewise preferably extend from side to side of the box. In the particular form of arch here shown the outer supporting members or carriers (1 rest. against the side sheets 2 and upon the adjacent tubes, and each intermediate brick a rests upon two tubes. As shown I prefer that there shall be more panels 0 than spans a, the panels being narrower and breaking joints with the span bricks. In short arches only two cross lines or series of the supporting spans are necessary; in longer arches three and sometimes more are used. Thus the arch herein shown has four such series or main arch spans. In building this particular arch I first place a series of bricks a upon the lower ends of the tubes and against or substantially against the flue sheet and then position the next series or main spin. higher up on the tubes and pa allel with the first. I then place the thin tlat bricks, slabs or panels upon these two supports to secure the second support in its proper relation to the flue sheet and close the space between the two supports. Afterward the next span the sides of the furnace preferably in such.

manner as to exert wedging force upon the intermediate bricks a, the opposite ends of which the inner ends of the bricks a preferably abut. The bricks a and a are indi- ,5 vidually wide enough to prevent them from rocking upon the tubes, (see Figs. 1 and 2.) The middle portion of eachbrick or span a, a is of less length than the remainder of the brick, and hangs or extends considerably below the tube and thus the depending middle portions of the panel supporting bricks form a series of. t'ansverse" partial walls or battles upon the under side of the arch and are transversely positioned in a manner best adapted to stop flying particles of fuel; and to break up the rapidly moving currents.0f gases and deflect them toward the grate. As indicated in the drawings I prefer that the top of the arch shall be substantially flat and therefore arrange. the

bricks Z1 composing the top or cover pbrtion of the arch in such manner that they abut longitudinally As before stated each panel brick extends from one supporting brick or span to the next above it, andthe ends of the panels substantially abut upon the tops of the spans. An advantage of this construction lies in the fact that the overlapping joints formed between the sup 4o'porting and the panel bricks protect the abutting ends of thc.pancls and the latter do not readily fuse together or to the supporting bricks. Transverse shoulders 5 formed upon the under sides of the slabs 4 5 or panels serve as stops or supports for the transverse members or spans a. In other words the panels act as spacers which hold the several, transverse spans apart. The end or edge panel bricks 7) prt-zferably so engage the side sheets of the furnace, after the manner of the bricks a the arch as a whole -being locked against movement with respect to the side sheets orthe flue sheet. A special advantage of an arch of this con- 555 structioiji is that only a very small quantity or surfaceof the fire brick engages the sheets of the fire box. practically all parts thereof being accessible Without removing the arch, and the small ren'iainder being an easy of access when the'margil'ial bricks are removed. Obviously the bulk or quantity ofrefractory material is less than that man ordinary arch, and compared with the latter the superficial area of my arch is much in-' as creased, both of which factors'insure the quick and clt'cctive ignition of the gases and combustiblcs that in'ipinge upon the arch when it hot.

Although i have herein shown supportint;- members or spans of the kind adapted. to the peculiar arrangement of arch tubes disclosed. it is obvious that my invention admits of other arrangements of such tubes and that the shapes and relations of both the spans and the cover bricks may be considerably modified without departing from the spirit of my invention. Therefore I do not confine the invention to the specific structure herein shown and described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A locomotive boiler firebox having: a plurality of arch tubes, in conibination with a refractory arch body resting on said tubes, said body comprising spans which. extend between and rest on said tubes. sa d spans beingulisposcd in spaccd-apart rows, and

panel or cover bricks which rest on saidspans space the same apart and close the spaces between the rows thereof, and said spans being provided with a plurality of transverse depending portions opening from the tubes, substantially as described.

2. A locomotive boiler. firebox having a plurality of inclined arch tubes. in com bination with a refractory arch body resting upon said tubes. said body comprising a. plurality of rows of refractory spans spaced apart on said tubes and presenting a plurality of transverse, vertical portions dependingbetween said arch tubes, and rows of thin bricks which rest upon, extend between, and close thespaccs between said rows of spans, substantially as described.

3. A locomotive boiler firebox having a plurality of arch tubes. in combination with transverse rows oi" span bricks supported by and depending, from and between said arch. tubes, and u pluratitv'of arch top forming bricks in turn supported by said span bricks and closing! the openings .between the rows thereof from sidcto side of thc tirebox,-substantially as described.

4-. A locomotive boiler lircbox having a plurality of arch tubes. in (\')llll)lil2lll()ll with a plurality-of transverse rows of bricks spaced apart upon and depending from and between said arch tubes and a plurality of arch top forming bricks, through the me dium of said transverse bricks being also supported by said arch tubes, said top forming bricks closingthe spaces between said transverse bricks and having transverse shoulderson their undcrsidcs. which serve as stops and spacers for said transverse lm'icks, substantially :s described,

In a locomotive firebox arch two transversely arranged and longitudinally spaced refractory arch spans each composed of a &

plurality of individual span bricks arranged end to end and each brick adapted to be supported by two firebox arch tubes, in combination with a plurality of panel bricks supported at the ends by said spans, closing the space between them and therewith completing the arch, substantially as described.

6. In a locomotive firebox having arch tubes an arch composed of refractory bricks, comprising a plurality of, spaced, parallel arch spans each made up ofseveral individual span bricks-each formed to span from one arch tube to another and having a portion depending between the arch tubes, and a refractory arch top resting upon and closing the spaces between said spans, substantially .as described.

7. A locomotive boiler firebox containing arch tubes in combination with an arch comprising a plurality of refractory spans each composed of several bricks having their ends transversely of the fire box in abutment upon said tubes, said spans being longitudinally spaced apart on said. tubes and a-substantially imperforate refractory. covering or arch top resting upon said spans and coextensive therewith, substantially as de-' scribed.

8. A locomotive boiler firebox in combination With a plurality of inclined arch tubes therein,apluralitzy of transverse bricks arranged on said tubes and spanning from tube to tube and each brick having a portion depending from the tubes, panel bricks spacing the first mentioned bricks apart upon said tubes and means preventing lateral movement of the first mentioned bricks upon said tubes, substantially as described.

9. A locomotive boiler firebox containing inclined arch tubes in combination with a plurality of parallel spans each composed of several refractory bricks which rest upon said tubes and have portions which depend therefrom, said spans being spaced apart upon said tubes, and a covering of refractory material resting on and supportedby said spans,-said spans and covering forming an arch ha ing a cavitied bottom presenting variously positioned deflecting surfaces, substantially as described.

10. locomotive boiler firebox containing arch-supporting tubes. in combination with several elongated bricks arranged in transverse rows spaced apart upon said tubes, having their ends supported by respective tubes, and bottom portions extending between the tubes, and a covering of thin refractory bricks resting on said elongated bricks and therewith completing a substan tially imperforate arch, substantially as described.

11. A locomotive boiler firebox .in combination with a plurality of inclined arch tubes therein,refractory spans disposedupon said tubes and spaced apart longitudinally thereon, each said spans comprising a. number of separate bricks of lengths substantially corresponding to the spacing of said tubes, and each brick having a portion extending between respective tubes, and a refractory covering extending between and resting upon said spans, said covering being substantially coextensive with said spans and composed of a greater number of separate bricks, substantially as described.

12. A locomotive boiler firebox containing a plurality of inclined arch tubes in combination with a plurality of refractory span bricks bridging said tubes and resting thereon and an arch top composed of panel bricks supported by said span bricks and spacing them apart, said bricks together completing a substantially imperforatc arch body and certain of said span bricks being provided with gas deflector portions disposed transversely of the firebox and depending from the tubes, substantially as described.-

13. A locomotive boiler fire box containing arch tubes and a plurality of transverse rows of refractory bricks hmgitudinally spaced in the tire box, each transverse row comprisil'lg a plurality of bricks resting upon and depending from said arch tubes, and av plurality of arch top bricks resting on said transverse rows of bricks and closing the spaces therebetween, substantially as described.

14. A locomotive boiler fire box having a group of arch tubes of less width than the firebox longitudinally arranged therein, in

combination with a front arch arranged in the firebox, said front arch comprising several transverselyarranged rows of bricks longitudinally spaced in the fire box, each said row comprising a plurality of bricks, certain of the intermediate bricks being sup ported by two arch tubes and having portions depending therefrom, and the outer bricks of each row having one end resting upon the tube, and the other end upon the side sheet, and a plurality of refractory bricks resting upon two adjacent rows of the transverse bricks holding the same in proper spaced relation and closing the space therebetween, as and for the purpose speci- In testimony whereof, I have hereunto set my hand, this 19th day of September, 1908, in the presence of two subscribing witnesses.

' CHAR-LES BREARLEY MOORE.

Witnesses CHARLES GILBERT TIAWLEY, JOHN R. Lnrnvnn.

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