US642260A - Furnace. - Google Patents

Description

No. 002,200. Patented Jah. 30, |900.

0. Rumsm.

FUHNACE.

(Application f11ed Apr. 1B, 1899.)

(No Model.) 2 Sheets-Sheet l,

g. flu",

Patentedlan. 30, |900. R. RUETSCHI.

F U R N A C E (Application filed Apr. 18, 1899.)

2 Sheets-Sheet 2...

(Nd Model.)

W/ TNE SSE S m E N w T T A 'raras PATENT OFFICE,

RUDOLPH RUETSOHI, OF ARGENTINE, KANSAS.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 642,260, dated January 30, 1900.

Application filed April18, 1899. Serial No. 713,460. (No'modcl.)

T0 all whom it may concern:

Be it known that l, RUDOLPH RUn'rsoHI, of Argentine, in the county of Vyandotte and State of Kansas, have invented certain new and useful Improvements in Furnaces, of which the following is a full, clear, and exact description.

The object of the invention is to provide certain new and useful improvements in boiler and other furnaces, whereby the fuel is conveniently introduced as needed, to insure proper and complete combustion in the fire-box in a very economical manner, and whereby proper repairs of the working grate can be made at any time and while the furnace is in use.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specication, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a sectional side elevation of the improvement on the line 1 l in Fig. Fig. 2 is a transverse section of the grate on the line 2 2 in Fig. l. Fig. 3 is a sectional front elevation of the improvement on the line 3 3 in Fig. l; and Figs. Il, 5, and 6 are sectional side elevations of modified forms of the grate.

The furnace is built of the usual brickwork A and is provided with a fire-box B, having an ash-pit B', of which the side walls support rails U for wheels D to travel on, said Wheels being journaled in a frame E, in which are journaled transversely-extendin g shafts F F', carrying sprocket-wheels G G, over which passes an endless grate H for supporting the fuel on the upper run and for discharging the ashes, as hereinafter more fully described.

As indicated in Figs. 1, 4, and 5, the grate H is arranged in an inclined position; but it may be disposed horizontally, as illustrated in Fig. 6. The grate, as shown in Figs. l and 2, is provided with grate-bars H,`pivoted on links H2, alternating with links H3, which links form sprocket-chains passing over sprocket-wheels G G', secured on the shafts F F', respectively. The grate-bars H' are preferably made approximately L-shaped, as indicated in Fig. l, and are formed with slots for the passage of air to insure proper cornbustion and also to allow ashes to drop through the slots to the ash-pit B below the grate.

The grate-bars H when on the upper run are disposed in step form, the main portion thereof extending horiz'ontally,the upwardly`- bent end resting on a link H3, said upwardlybent end being under the horizontal portion of the following grate-bar Il. The fuel is discharged upon the upper run of the gratebars from a hopper I, having two gates I I2, one at the rear end and one at the bottom, to allow of regulating the supply of fuel to the said grate-bars.

At the inner end of the grate H-that is, opposite the wheel G'-is arranged a firebridge J, made of longitudinally-spaced segmental ribs concentric with the wheel G, said tire-bridge forming a resting-place for the rear ends of the grate-bars H/ as the latter pass around the wheel G' from the upper run of the grate to the lower run, said grates in swinging on their links H2 striking against said fire-bridge to insure a proper dumping of the ashes contained on the grate-bars. Furthermore, the said fire-bridge J allows the grate-bars H to swing slowly from their vertical position on their upper run into an ap proximatelyvertical position on their lower run.

A table K extends under the upper run of the grate H near the wheel G, so that any coal-dust falling through the grate-bars at this point accumulates on said table and nally passes over the lower end thereof upon a forwardly and upwardly inclined deflecting-plate L, attached to the framework E, the same as the table K. By this arrangement the coal-dust falling through the uppermost grate-bars on the upper run of the grate is prevented from mixing with the ashes discharged from the grate-bars as the latter proceed on their downward journey farther into the fire-box B. The table K further serves to partially exclude air from passing to the grate-bars at or near the upper end of the upper run, to cause coking of the fuel shifted from the hopper I, before the fuel is burned by the admission of air passing to the gratebars below the deiiecting-plate L and at the time the grate-bars have advanced to about the middle of the fire-box B'.

It is understood that when the furnace is in operation the fuel on the lowermost gratebars of the upper run burns briskly under IOO admission of air passing in an upward and inward direction from the front lower end of the fire-box under the plate L, while the fuel on4 the uppermost grate-bars of said upper run is coked under a partial exclusion of air, so that this coked fuel will readily ignite as the grate-bars advance in the fire-box in a downward and inward direction. The burning fuel on a preceding bar readily ignites the fuel on the following grate-bar, especially, as the following grate-bar islocated somewhatV higher than the preceding one, as will be readily understood by reference to Fig. 1.

The ashes from the burning fuel readily pass through the slots in the grate-bars and drop into the ash-pit B', and any ashes left on the grate-bars is finally dumped therefrom at the time the grate-bar swings over and strikes the fire-bridge J. The grate bars upon passing in a downward direction on the lower run of the grate hang loosely and in an approximately vertical position, and as these grate-bars pass through the current of air rising upward and inward in the fire-box said grate-bars are cooledv to a considerable extent before receiving a fresh supply of fuel when passing under the hopper I, and after they have passed to the upper run of the grate around the wheel G.

The outer end of the shaft F is connected with suitable machinery for imparting a'slow rotary motion to said shaft to rotate the sprocket-wheel G and cause the grate H to travel in the direction of the arrow a', as indicated in Fig. l. As the grate-bars H on the lower run of the grate hang vertical, sufiicient space is left between adjacent gratebars to form passages for the dropping ashes from the grate-bars on the upper run.

A front N is attached to the frame E, and is provided with a hinged door N' for giving convenient access to the grate-bars and the sprocket-chains at the time they pass around the wheel G, so that repairs can be readily made on any one of the grate bars or links of thechains during the passage of the same around the wheel G. As the gate travels very slowly it is evident that such' repairs can be made without stopping the rotation of theshaft F. The front N is further provided With a door N2, extending down into the ash-pit B', to close the front end thereof. The side edges of the front N reach toa fixed casing O, which supports the hopper I and abut against the f rontof the brickwork A, to completely close the front end of the tire-box,

When it is desired to have access'to the fire-box or other parts of the furnace, it is only necessary to run the frame E, with its grateand front outer end, on the rails C to allow'of cleaning the furnace and also the grate, if necessary.

I do not limit myself to the peculiar form of grate-bars shown .in Figs. l and 2, asl the same may be varied. For instance, as shownV in Fig'. 4, the grate H4 has its L--shapedl gratebars H5 provided with lugs H6 at the pivot end to form a support for the next following' grate-bar, as will be readily understood by reference to the said figure. In Fig. 5 the grate H7 has grate-bars H8, made flat, with small lugs H1 at the rear ends to abut against the link H10 for supporting the next following grate-bar. The grate may also be arranged with its upper and lower ends horizontal, as indicated in Fig. 6, and in this case the grate H11 has grate-bars H12, which are `iiat and form a continuous surface when at the topvrun of the endless grate to properly support the fuel. The grate-bars H12 strike vagainst the fire-bridge J when moving from the upper run' to the lower run at the inner end of the grate'to properly discharge the ashes, as previously-explained.

Having thus'fully described my'invention,

I claim as new and desire to secure by Letters Patent- Y I 1. A furnaceprovided with a fire-box, and

an endless traveling grate having pivoted grate-bars arranged to form a continuous support for the'fuel at the upper run of the traveling grate, and to form open spaces between adjacent grate-bars at the lower run of said grate for the passageof ashes and coal-dust, said grate being arranged in an inclined position, the grate-bars being arranged in step form on the upperrun, substantially as shown and described.

2. A furnace provided with a fire-box, an endless traveling grate having pivoted gratebars arranged to form a continuous support for the fuel at the upper run of the traveling grate', and to form open spaces between adjacent grate-ba'rs at the vlower run of said grate for the passage of ashes and coal-dust, a table under part of the upper run at the front or fuel-receivin'g'end thereof, and a defleeting-plate extending/downwardly and forwardl y between the upper land lower Arunsand below the lower end of said table, substantially as shown and described.

3. lnafurnace, the combination of an'inclined traveling grate mounted'in the tire-box, and means mounted beneath the outer portion of said grate, such means receivingthe coal-dust from the grate and carrying the RUDOLPH RUETsoH'I.

Witnesses:

JUDD STEWART, REYNORD P. REEsE."

IOO

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