US943823A - Locomotive-boiler furnace. - Google Patents

Description

P. F. GAINES. Y

LOOOMOTIVE BOILER FURNACE.

APPLICATION FILED AUG. 28, 1909.

Patented Dec. 21, 1909.

2 SHEETS-SHEET 1.

WITNESSES 'F. P. GAINBS. LOGOMOTIVE BOILER FURNACE. APPLICATION FILED AUG. 28, 1909.

Patented Dec. 21, 1909.

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1 '0' all-whom it may concern;

BeltlillOWH that I FREDERICK F. Gnixns,

. of-Savannah, in the county of Chatham and,

Patent. of the' United 'States'No. 234,157, lfi,

.bta'te of'Georgia, haveinvented a certain new and usefulImprovement in Locomotive- .Boiler Furnac'es, of which improvement the following is a specification.

My present invention relates to locomotive boiler furnaces 'of the type in which the spacew'i-thin the. firebox is divided, by a vertical bridge wall, into a rear fire chamber andaforward'combustion chamber, an instance of which is exemplified in Letters granted and issued to me under date of September 14, 1909.

The object of my inventionis to facilitate the free steaming of a locomotive boiler having 'a furnace of the above type, as well as to increase the life of the grate bars used therein." I 7 The improvement claimed is hereinafter fully set forth.

is av vertical longitu inal central section through the firebox and the adjoinin portion of the. waist of locomotive boiler,

illustrating-an application of my invention,

and; Figs. 2 and-3,, vertical transversesections through .tl1firebox, on the lines a a and'b b, respectivelyot Fig. 1.

- My invention isherein exemplifiedas applied in a locomotive boiler of the type .shown in Letters Patent No. 934,157 aforesaid, that is to say, having a Wide firebox, 1, connected to a waist, 2, throu h which a plurality'of. fines, 3, extend irom a flue sheet, 4, to a smoke box' (not shown); at the forwardend of the Waist-Z. The rear Water wall of the firebox is provided with one or -moreifiring openings, controlled by suitable doors in the usual manner, two of said openings belng used-1n th s case, and the flanges,

"5", around one of -them which is out of the longitudinal central plane of section, being shown in Fig. 1. 'The interior of the firebox is, as in Letters Patent No; 934,157 More said, divided bya vertical-bridge wall, 7, of

. firebrick or .other 'suitable'. refractory mate;

rial, supported ona transverse bearer, 8, into afir'e chamber, A,'extending from'the rear side of the bridge Wall to the rear of the firebox, and a. combustion chamber, B, extending from the frontside of the bridge wall to the flue sheet, 4:. v Y

In the practice-of my present invention,

drawings:- 1* igure 1 Y I provide a plurality of grate bars, (l, of: any 1 trunnion's, 6, which fit in the bearers, 6 and pass: through sockets or thimbles, l ,'.'fixed in the rear water wall of the firebox, a short distance above the mud ring, 1, thereof, and the middle portions of the grate bars. rest on intermediate bearers, 6, fixednto the sideportions of the mud ring. The grate bars I I PatentedDo;"21,"1909. Application filed August28, 1909. Seria1No.514,986.

may be rocked or shaken by bars applied to squared portions on the outer endsot their rear trunmons, in order toclear them ofcinders when desired. I also provide a plu-' 'rality of open ended water grate tubes, 12, which are formed of double extra strong pipe, preferably about 2 inches in diameter, and are securechat their front and rear ends, in the flue sheetyl, and the back sheet,

4, of the inside firebox, respectively, said;

water grate tubes passing through the bearer, 8, of the bridge wall, and under, and

entirely clear of, the bottom plate, 10,-of the combustion chamber, B. As shown in Fig.

1, both .the grate bars, (3, and" water grate tubes, 12,:1re downwardly inclined trom the rear to the front ot'the fire box, and :u'o'

relatively alternated in position, each grate bar being interposed between two water grate tubes. In the instance shown, one of the water grate tubes is located in the lon-.

gitudin'al central plane of the firebox, and consequently the combustion chamber, B, is provided with two discharge hoppers, 11, each having a movable slide or door, 11. It will, however,' be obviousthat a single discharge hopper willonlybe necessary if the middle water grate tubes are located on op-v posite sides of the longitudinal central plane.

I have found in practice that the free steaming qualities of a locomotive boiler of the type towhich my invention relates are materially promoted by the. use of my improvement. The alternated grate barsa'nd water grate tubes present a grate surfacewhich is suitable for the supportof the fuel and the proper admission of air thereto,

and which maybe readily cleared of cinders' by rocking the grate bars. The water grate tubes, the locatlon of which is such as not to reduce or interfere with the combustion chamber space, maintain a-constant clrculafthe firebox, and as the water therein is heatt-ion of water in the boiler, as the colder Water naturally tends to pass to the lowest point, whlch is in the front water wall of ed, it rises and colder-water takes its place.

vThe interposition of the grate tubes between i thevgrate bars has the further advantage of increasing the life of the latter by'preventing them from rapidly burning out, as they are found to do. when forming the entire 7 supporting chamber- "I claim as my invention and desire to se-.

surface of the fuel in thenfire cure by Letters Patent:

The comblnation, w th a locomotiveboiler firebox, of a bearer extendlng across the firebox near the bottom thereof and attached at its ends thereto, a bridge wall of refractory material supported on said bearer and dividingthe interior of'the firebox into a rear fire chamber space and a forward combustion chamber space, a bar grate extending longitudinally at the bottom of the firechamber space, and a plurality of water grate tubes, alternated in position with the bars of the grate and extending from the.

' rear to the front water wall of the firebox and below the combustion chamber space.

2, The combination, with a locomotive boiler firebox, of a bearer extending across the firebox near the bottom thereof and. at-

tached at its ends thereto, a bridge wall of. refractory material supported on said bearer and dividing the interior-of the firebox into a-rear fire chamber space and a forward combustion chamber space, a plurality of rate bars extending from the bridge wall to the rear wallof the'firebox, and a plurality of water grate tubes, alternated in position with the ra te bars and extending from the rear to front water wall of the firebox and be w the combustion c amber space.

3, The combination, 'with a locomotive boiler firebox, of a bearer extending across the firebox near the bottom thereof and attached at its ends thereto, a bridge wall of refractory material supported on saidbearer and dividing the interior of the firebox into a rear fire chamber space and a forward combustion chamber space, a plurality of rocking or vibratable' grate bars extending from the bridge wall to the rear water wall of the firebox, and a plurality of water'grate tubes,"alternated in position with the grate bars and extending from the rear to the front-- water wall of the firebox and below the combustion chamber space.

4. The combination, wlth a locomotive boiler firebox, ofa bearer extending across the firebox near the-bottom thereof and attached-at its ends thereto, a bridge wall of refractory material supported on said bearer and dividing the interior of the fireboxinto a rear fire chamber space and aforward combustion chamber space, sockets or thimbles fixed in the rear water wall of the firebox, grate bar bearers fixed to the bridge wall bearer, a plurality of grate b'ars havingend trunnions supported on the grate bearers and in the sockets or thimbles, and a plurality of water grate tubes, alternated in extending.

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