Nov. 5., 1946. - H. E. MAY _ LOCOMOTIVE BOILER FIREBOX FiledSep'h. 4, 1945 2,410,513 ‘ Patent-ed Nov. 5, 194a " “ UNITED 2,410,513 PATENT OFFICE 2,410,513 BOILER FIREBOX ‘ .lilenry, E. May, Chicago, Ill. leglplicationeseptember 4, 1945, Serial No. 614,282 ‘ 6 Claims. '1 (Cl.122—-—68) 2 1 In the drawing: This invention relates to improvements in loco pointed out in’the appended'olaiins'l' ‘ ' ‘ " ' Fig. 1 is a longitudinal vertical sectional view motive boiler ?reboiies and it" consists of ‘the 'mat ters hereinafter described anemone‘ particularly through a locomotive boiler ?rebox embodying the preferred form of the invention. " " ‘ Fig. 2 is a transverse vertical sectional view The invention is more especially concerned with relatively'wide ?reb'oXes employing at "least ‘three laterally spaced, longitudinally extendin'g'wa't'er steaming and ‘circulating elements 'which "con veniently may be in‘ the" iormbf'the well known Nicholsonthermic syphons. A syphon‘ or ‘this ; through a part‘of the ?rebox appearing in Fig. 1 as taken ‘on the line 2-'—2 thereof. ' Referring now in detail to‘ that embodiment of the invention illustrated ‘in the drawing‘, the fire box therein shown includes a'crown sheet 5'; which merges into the inner side sheets 5, the inner back sheet ‘F and inner throat sheet 8, which is con stituted by the bottom portion of a ?ue sheets. 10 type includes‘ a‘ ?at hollow water wall’that opens at itstop end through the crown sheet and has a bulged bottom which form's'a continuation of The outer back sheet or‘ the boiler ' is indi an inlet neck in communication with‘a'low‘er' part 15 cated at I0 ; the outer side sheets thereof are'i'ndi of the boiler of "which the meter; ‘forms a‘ part. cated at l I-l l and the outer throat sheet'is indi When three of such elements‘are diseosedm a cated at 12. Said sheets cooperate with a top sheet F3 for the boiler in providing the back Water leg l4,‘ the side water legs l5_i—l 5 and ‘front throat ?rebox, the intermediateon'e ha's‘b'e'en positioned in the longitudinal central plane of the ?rebox and th'e'syphonsiare spaced laterally ither'efrer‘n with the bulged bottom‘ and inlet maker-anti 20 l6,’ respectively, all in‘co'mmunication with the water andsteam space ll' of the boiler. The back said elements disposed in parallel relation ir'i’the same inclinedplan'e. ployed in such a ?rebox,When’ certaina'?re'hreh' sets of theisbricks and side water legs and the front throat are bot tomed by a mud ring it and portions of the inner and the outer back sheets are 'fo'rmed'to" coact in providing a fuel door opening l9‘ that appears thereof syphons and‘ other areand sets supported lean thereof against inare partsupplorted theall three adjacent bythe sy" side “' in dotted lines in Fig. 1. The structure described which is typical of a conventional locomotive sheets. With such an arrangement of parts the boiler ?rebox, is suitably staybolted andcertain arm is relatively flat andshallowjhroughout ones of such bolts ‘are indicated by dotted lines itswidth and the e?ective cross sectionalarea of a the' combustion chamber is somewhat restricted in the ?rebox are located three laterally spaced, and effects the combustion ei‘?gciency oflthe ?re longitudinally extending water steaming andcir 2El—20inFigs.1'and2. box. ' ' " v ' ' ’ ' ‘L “ culating elementsQeach of which is preferably'in the form of a "conventional Nicholson thermic to’ provide a locomotive boiler “?rebox structure of this kind wherein better "operational ,e?iciency is obtained therein Without increasing lthe?c'ost same ' ‘ One of the objects of the presentfinvention vis of'the ‘ ‘ " t syphon. In Figs. '_1 and‘2 the side syphons‘are " each indicated as a whole by the numeral 21-21 and the intermediate‘ syphon is indicatedmas‘ a ' whole by the numeral 22. The intermediate A further object of theinvention is to (so arrange syphon is disposed in the longitudinal'medi'al the water steaming and circulating '_ elements ‘in plane of the ?rebox and the side syphons 2l—"-2l 4-0 the ?rebox‘ as to increase the effective height and are spaced equal distances from the intermediate cross sectional area of the central longitudinal syphon. All of the syphons are structurally ‘simi' part of thecombustion space‘ of the ?rebox and lar, the only differences being a‘ different dispo sition of certain of the parts of'the ‘intermediate thereby v'obtain'_ more bene?ts from-‘the ‘burning fuel in the ?rebox than heretofore possible. syphon relative to like parts in the side syphons Another object or" the invention isnto provide a ‘ and a body portion of less‘depth. ' ' ‘ " ?rebox structure that includes an “arch requiring Each syphon as herein shown ‘comprises a flat but two patterns for the bricksused therein, thus hollow upright body which includes laterally simplifying the yard storage of said bricks as spaced staybolted side walls 23—23 and‘ti'ans wellas’the initial building up ‘and the servicing of 50 versely rounded front and rear end walls ?fand thearch' . . . ., ,. 4,7 25 respectively which at their top ends are formed'to provide a laterally extending ?ange t. The above mentioned objects of the invention, 2E. ri‘his flange of the intermediate syphon en gages parts of the like ?anges of the side sy as'well as others together with the ‘advantages thereof 'will' more fully appear as the 'speoi?'ca— tion proceeds. " Mi‘ " .. 55 phons and all of said ?anges collectively are 2,410,513 4 suitably welded together and ?t and are welded cept as may be speci?cally set forth in the ap into an opening provided therefor in the crown pended claims. sheet 5. Thus the top end of each of said syphons I claim as my invention: discharges into the boiler water and steam space 1. In combination with the ?rebox of a loco 11 of the boiler above the crown sheet. motive boiler, laterally spaced water steaming and The bottom end of the body of each syphon circulating elements extending longitudinally of is closed by a bulged portion 21 which forms a the ?rebox, the top of each element opening continuation of one end of a tubular inlet neck through the crown sheet thereof, each element 28, the other end of which communicates with being bottomed by a downwardly and forwardly a lower part of the water space of the boiler. 10 inclined bulging portion forming a continuation Generally said other end of said neck is ?xed in of a tubular inlet neck that communicates with a suitable ?exible diaphragm 29 in the upper r a lower part of the boiler, a water steaming and portion of the inner throat sheet as best appears circulating member between said elements and in Fig. 1. The bulged portion and associated including a downwardly and forwardly inclined inlet neck of each of the syphons is disposed in 15 portion arranged in a plane above. and substan a forwardly and downwardly inclined plane as tially parallel with said bulging portions and said best appears in Fig. 1. However, in this instance necks of said elements and which member opens the longitudinal axis of the bulged portion and at its ends into upper and lower portions respec associated inlet neck of the intermediate syphon, tively of the boiler, and bricks supported in part while parallel with the like axis; of the like parts 20 by said bulged portions and said necks respec of the side syphons is disposed in a higher plane. tively of said elements and in par-t by said por Thus the body of the intermediate syphon is tion of said member and forming therewith a part shorter in height, when considered vertically, of an arch that increases the e?ective height and than are the bodies of the side syphons. cross sectional area of the central longitudinal In connection with the arrangement of the 25 part of the combustion space in the ?rebox, be syphons described, I provide two sets of bricks low the arch. to form a novel type of arch, later to be men 2. In combination with the ?rebox of a locomo tioned, the bricks in'one set being of one pattern tive boiler, laterally spaced water steaming and or form and the bricks in the other set being of circulating elements extending longitudinally of another pattern or form. As best shown in Fig. 30 the ?rebox, the top of each element opening 2, the bricks of one set are designated by the through the crown sheet thereof, each element numeral 30 and the bricks of the other set are being bottomed by a downwardly and forwardly designated by the numeral 3i. inclined bulging portion forming a continuation The bricks of the set 30 are preferably of a of a tubular inlet neck that communicates with concave-convex shape from end to end and these 35 a lower part of the boiler, a water steaming and ends are so formed that they will engage in sup— circulating member between said elements and porting relation at their outer ends upon the including a downwardly and forwardly inclined bulge portion on the inner face of the side sy portion arranged in a plane above and substan phons and will engage in supporting relation upon tially parallel with said bulging portions and said both sides of the bulge portion of the intermedi necks of said elements and which member opens ate syphon. These bricks in combination with at its ends into upper and lower portions respec the bulge portions of the syphons provide a chan tively of the boiler, sets of bricks supported in nel-like combustion space addition between the .part by said bulged portions and said necks re side syphons which increases the cross sectional spectively of said elements and in part by said area of the main combustion space of the ?re 45 portion of said member and forming therewith box. ‘ a part of an arch that increases the effective The bricks in the set 3! rest at one end upon height and cross sectional area of the central an outer part of the bulged portion of each side longitudinal‘ part of the combustion space of the syphon and extend upwardly and outwardly ?rebox below the arch, and other sets of bricks, therefrom to have a leaning supporting engage 60 each supported in part by said bulged portion and ment against the associated side sheet of the neck respectively of an associated element and ?rebox as best appears in Fig. 2. in part by a side sheet of the ?rebox adjacent an With the arrangement described, a Dutch associated element and forming side portions oven-like structure is provided. 7 This results in that complete the arch in the ?rebox. better combustion and radiating effects for the 3. In combination with the ?rebox of a loco longitudinal central part of ?rebox under the motive boiler, a plurality of laterally spaced, side arch, with the rear end portion thereof more and intermediate water steaming and circulating closely approaching the crown sheet on its lon elements extending longitudinally of the ?rebox, gitudinal median line. Thus the products of the top of each element opening through the combustion, as they swirl forwardly under the crown sheet thereof, each element being bot central portion of the arch, impinge against that part of the crown sheet between the side syphons for a better heating action thereof. Again, with the bricks in the two sets men tioned arranged as described, more space is pro vided between the side syphons for the workmen tomed by a downwardly and forwardly inclined bulging portion forming a continuation of a tubular inlet neck that communicates with the lower part of the boiler, the downwardly and forwardly inclined bulging portion and neck re spectively of the intermediate element being ar in setting the bricks in place to form the arch. ranged above but substantially parallel with the . Also with they parts arranged ‘as described, a like portion and neck respectively of the side ele more e?icient ?rebox is provided without increas ments, and bricks supported in part by the bulged ing the cost thereof. 70 portions and necks respectively of said side and While in describing the invention I have re- ' said intermediate elements and forming there ferred in detail to the form, construction and ar with a part of an arch that increases the effective rangement of the parts involved, the same is to height and cross sectional area of the central lon be considered only in the illustrative sense and gitudinal portion of the combustion space of the therefore I do not wish to be limited thereto ex 75 ?rebox, below the arch. 2,410,513 5 4. In combination with the ?rebox of a loco motive boiler, a plurality of laterally spaced, side and intermediate water steaming and circulating elements extending longitudinally of the ?rebox, the top of each element opening through the crown sheet thereof, each element being bottomed by a downwardly and forwardly inclined bulging portion forming a continuation of a tubular inlet neck that communicates with a lower part of the 6 portion and necks respectively of said side and intermediate elements respectively and forming therewith a part of an arch that increases the ef fective height and cross sectional area of the central longitudinal portion of the combustion space of the ?rebox below the arch, and other sets of bricks, each supported at one end upon the bulged portion and neck respectively of an associated side element and extending upwardly boiler, the downwardly and forwardly inclined 10 and outwardly therefrom and engaging at their other ends against the side sheet of the ?rebox bulging portion and neck respectively of the in adjacent the associated side element and forming termediate element being arranged above but sub the side portions that complete the arch in the stantially parallel with the like portion and neck ?rebox. I respectively of the side elements, sets of bricks 6. In combination with the ?rebox of a loco supported by said bulged portion and necks re 15 motive boiler, a plurality of longitudinally ex spectively of said side and said intermediate ele tending inclined water circulating elements ments and forming therewith a part of an arch spaced laterally in the ?rebox, both ends of said that increases the e?ective height and cross sec elements opening through the ?rebox sheets into tional area of the central longitudinal portion of the combustion space of the ?rebox below the 20 the water space of the boiler, the lower ends of said elements opening into the boiler at a point arch, and other sets of bricks, each supported in forwardly of the rear ends, a longitudinally ex part by the bulged portion and neck respectively tending inclined water circulating element posi of a side element and in part by a side sheet of tioned intermediate said ?rst mentioned elements the ?rebox adjacent said element and forming the side portions that complete the arch in the 25 in a plane above the same, said last mentioned element also being inclined and having its ends ?rebox. 5. In combination with the ?rebox of a loco motive boiler, a plurality of laterally spaced side and intermediate water steaming and circulating elements extending longitudinally of the ?rebox, the top of each element opening through the crown sheet thereof, each element being bot tomed by a downwardly and forwardly inclined bulging portion forming a continuation of a tubular inlet neck that communicates with a 35 lower part of the boiler, the downwardly and for wardly inclined bulging portion and neck re spectively of the intermediate element beingar ranged above but substantially parallel with the like portion and neck respectively of the side ele ments, sets of bricks supported by said bulged opening into the water space of the boiler with the lower end at a point forwardly of the rear end, and a ?rebrick arch comprising bricks ex tending between said ?rst mentioned elements and the adjacent side sheets of the ?rebox and being supported by said parts, and other bricks extending between and supported upon said in termediate element and said ?rst mentioned ele ments and forming therewith an elongated Dutch oven-like channel which increases the effective height and cross sectional area of the central longitudinal part of the combustion space below the arch. HENRY E. MAY.