US1335399A - Locomotive-firebox - Google Patents

Description

' C. A. SIEGEL. LOCOMOTIVE FIREBOX.

I APPLICATION FILED DEGQ, I9I8- I 1,335,399. I PatentedMaI. 30, 1920.

2 SHEETS-SHEET l- Gran ieze VeZ c.' A. SIEGEL.

LOCOMOTWE rmesox.

APPLICATION FILED DEC. 4, 1918.

1,335,399. Patented Mar. 30, 1920.

2 SHEETS-SHEET 2.

CHESTER A. SIEGEL, OF NEWARK, NEW JERSEY.

LOOOIVZOTIVE FIREBOX.

To all whom it may concern:

Be it known that I, Cnns'rnn A. SIEGEL,

a citizen of the United States,residing at r :41 Roseville avenue, Newark, county of Essex, and. State of New Jersey, have invented certain new and useful Improvements in Locomotive-Fireboxes, fully described and represented in the following specification and the accompanying drawings, forming apart of the same. I

1 his invention relates to an improvement in the bridge-wall or so-oalled arch some times employed in thefirebox of a locomotive or tubularboiler to retard the movement of the flaming gases into the tubes,

and to thus retain the heated gases more effectively in contact with the crown-sheet of the firebox, to promote an increased generation of steam and better circulation of water in the water legs.

In the presentconstruction the-arch may be termed a water-archflas it is constructed of two metal walls with the water circulated between them and connected to the water-legs of the firebox and to the crown of the same.

This water-arch is extended from the grate level upwardly and backwardly so as to lean over the fuel burning upon the grate and thus absorb the heat most effectively therefrom. v

The ends of the arch are in communication with the water-legs, and the inclined top-portion of the arch is connected with the crown of the firebox by two water-tubes which divide the space over the arch into 7 three passages, one at the middle and the others at the sides of the firebox.

Such connections afford a free entrance for the water to the water-arch and the escape of the steam therefrom into the steam-space S of the boiler.

The base of the water-arch extends to the bottom of the water-legs, and as the ends of the water-arch are in open communication with the water-legs this construction permits and induces a current of the colder water from the water-legs into the bottom of the arch. The water as it is heated flows upwardly by degrees into the upper part of the boiler above the crown-sheet. The circulation of water between these points is most important and advantageous.

The base of the arch is located far enough from the ends of the fire-tubes to form a mixing or combustion-chamber back of the v Specification of Letters Patent. Patented 1H 3,1 30,1920, App1ieati on filed December 4, 1918. Serial No. 265,206.

arch in which-the combustionis-developed before the gases enter the tubes. v v

The construction will'be-under'stood by reference to the annexed drawing, in which Figure 1 is a longitudinal central section of a locomotive firebox and apart of" the attached barrel which'co'ntains the fire-tubes; Fig. 2 isa cross sectionthrough the watertubesin the top of the arch on line 22 in Fig. 1 g and Fig. '3 is a plan of the arch and the combustion-chamber behind the same.

.A designates the water-legs of the firebox,

and B the crown sheet thereof. O -isone of the fuel-doors, and D the barrel of the boiler through which-the fire-tubesF are extended.

' The level of the grate in the bottom of the'fire-box is indicated by the dotted line F, and the water-arch Gisexte'nded-rearwardly from-the lowestgpoint of the-waterleg upward over the front end of theagrate, and is curvedrearwardly to lean over "the :rear' end of the grate about one-third of the grates length. r

The foot ofthe water-arch is connected'to the sidewvater-legs of'the firebox-at aconside'rable distance in the :rear of the tubesheet so as to forma combustion-chamber J, and the arch itselfisthus'locatedin the central portion of the firebox 'where the heat is the greatest. H

This leaves {a large part of {the {space above the grate uncovered so that the radiant heat can pass from the fuel directly to the crown-sheet, and thus heat the water above such sheet most effectively.

The projection of radiant heat from the fuel is the most effective result of the combustion, and the water-arch as just stated is so proportioned that it forms no obstruction between the fuel upon a large portion of the grate, and the crown-sheet where the steam is most effectively generated.

The radiant heat from the forward part of the grate acts directly upon the water in arch are integral with one another at the I top end G, and are connected at the bottom by a spacing-piece G Two water-tubes H extend from' the top of the arch to the crown-sheet B, being located nearer to the sides than to the middle line of the boiler, thus forming three passages I and I from the rear part of the firebox to the combustion-chamber J in the front of the same. The water-tubes are in open connection at the bottom-endswith the water in the water-arch, andat the upper end with the water above the crown-sheet.

The ends of the water-arch are, as shown in 2, in open communication with the water in the water-legs A, and the colder water in the boiler in thus constantly flowing downward into the water-arch and upwardly through the tubes H, carrying with it any steam generated in the arch.

Such colder water of the boiler is often found in the bottom of the water-legs, and

owing to the connection of the water-arch with the water-legs at their lowest point, the cold water at such point flows readily into the water-arch and rises upwardly therein as it is heated.

The firebox is extended in the front of the grate sufficiently to form the combustion-chamber J between the water-tubes H, the arch Gr, and the adjacent ends of the fire-tubes E.

I am aware that water connections have been extended between the sidewalls of the firebox but at points considerably above the bottom of the water-legs at which point a movement of the water is most desirable to prevent the accumulation of scale. I do not therefore claima water-arch broadly, but the particular construction and relation of my water-arch to the water-legs.

Hand-holes having removable covers M are shown at the bottom of the water-legs in Figs. 1, 2 and 3, to facilitate the cleaning out of the bottom of the arch in case any sediment accumulates therein, and a vent L is provided in the bottom of the combustion-chamber J to remove any ashes or sediment therefrom.

My water-arch is constructed with very few parts, and this attachment for locomotive boilers is therefore cheap and durable, and may be readily applied to such boilers as are already in use. It promotes the proper mixing and combustion of the gases while retaining the operation of the radiant heat upon the crown-sheet.

My invention is thus practicable and efiicient in every respect.

Having thus set forth the nature of the invention what is claimed herein is:

A locomotive boiler having a firebox with water-legs at opposite sides, a fuel-door at one end and the tube-sheet at the opposite end extending downward to the bottoms of the water-legs, a water-arch extending from the lowest point of the water 1egs at the front end of the grate upwardly and rear wardly over the front end of the grate and being in open communication with the water-legs to the bottoms of said legs and producing a current of water outwardly from the bottoms of the water-legs, hand-holes and covers at the bottoms of the water-legs communicating with the lower part of the water-arch for cleaning out the same, and at least one water-tube extended from the top of the water-arch to the crown-sheet, whereby the water flows through the waterarch from the bottoms of the water-legs to the upper water-space over the firebox.

In testimony whereof I have hereunto set my hand.

CHESTER A. SIEGEL.

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