US332196A - fubman - Google Patents

Description

(No Model.) 2 sheets-sheet 1.

E. J. EURMAN.

STEAM GENERATOR.

No. 332,196. PatentedDeo. 8, 1885.

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(No Model.) n 2 sheets-sheet 2.

F. J. FURMAN.

STEAM GENERATOR.

No. 332,196. Patented Deo. 8, 1885.

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Attorney UNITED STATES PATENT IIIEEICE.

FREDRIO J. FURMAN, OF GENEVA, NEW YORK.

. STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 332,196, dated December 8., 1885.

Application filed September 4, 1885. Serial No. 176,134. (No model.)

To LU whom t may concern:

Be it known that I, FREDRic J. FURMAN, a citizen of the United States of America, re-

siding at Geneva, in the county of Ontario and' use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to certain new and useful improvements in steamgenerators or low-y pressure boilers,which are adapted to be used for generating steam for heating purposes; and my invention consists in the construction and combination of the parts, as will be hereinafter fully set forth, and specifically pointed out in the claims.

In the accompanying drawings, which illustrate my invention, Figure l is a vertical sectional view of a furnace and steam-generator constructed in accordance with my invention. Fig. 2 is a transverse section taken on the line y y of Fig. 1. Fig. 3 is also a transverse sectional View taken on the line x :v of Fig. l. Fig. 4 shows detail perspective views of the water-tubes, and Fig. 5 is a detail perspective view of the damper.

A represents the ash-pit, which is provided at its front with a door, a, above which is a horizontal slot, a', through which passes arod, b, which is attached to the gratel B, for the purpose of shaking said grate. The opposite side of the frame of the ash-pit is provided with a frame or casing, C, which extends partially above the plane of the ash-pit, and is provided with an opening, c, which is encircled by the chimney C. This portion C adjacent to the upper edge of the ash-pit opens into the ash-pit and above into the body portion of the furnace. On a line with the top plate, d, of the ash-pit the casing C is provided with a damper, D, which is constructed as shown in Fig. 5, the damper-plate being provided at its ends with oppositely-curved portions, so that when the damper is turned the opening e may be closed, so that the opening above the plate d, which is indicated by the letter e', will connect directly with the chimney. The ash-pit is also provided with a draft-door, D, by means of which, when the same is opened or closed, the draft may be regulated.

rlhe plate d rests immediately above the upper edge of the wall of the ash-pit, and it is provided with a circular series of perforations, f, adjacent to which are upwardly-pro jecting anges, Within which lies a ring having corresponding perforations, said ring being provided at its front portion with depending pins, which pass over the bar b, attached to the grate, so .that when the grate is shaken this ring will be also moved, and the dust which may collect thereon will be siftedinto the ashpit. The grate-frame is attached to thcinner side of the circular opening which is formed in the plate d, and the grate is hung within this frame in the usual manner. Adjacent to the grate-frame, within which is hung the grate B, the plate d is provided with a series of perforations or recesses, within which will lie projections e, which are formed at the base of closed ends of the tubes E. Asteam-dome and waterreceptacle, F, is attached to the upper ends of the tubes E E, and said receptacle is provided with a central passage-way, through which the magazine depends, said magazine being indicated by the letter F, and the same is provided near its upper end with a horizontal flange, g, which extends around the same and rests upon the upper plate of the receptacle F. The lower portion of the magazine has attached thereto a casting, the lower edge of which converges or tapers inwardly, said casting being indicated by the letter j", and it is provided at one side with double walls, which are connected to a pipe, 7L,which extends upwardly on the inner side of the magazine, said pipe being connected by a tube with an opening, h', in the wall of the ash-pit adjacent to the opening e. The magazine is provided with a suitable cover, which may be easily removed therefrom for filling the same with coal or other fuel. The outer casing of the stove is covered on its inner side with hre-brick, which rests upon the plate d, and said casing of iirebrick and the outer wall of the furnace are provided with an opening, fi', for inspecting and stirring the fire.

A top plate is securely attached to the fire- IOO brick and outer casing, and is encircled on its opened to allow a full supply of air under the under side, adjacent to the joint thereof, by a grate, the damper D being in the position band, t', which will make between the steamdome and the inner vertical edge of the outer wall a steam and gas tight joint, the flange g of the magazine also making a steam and gas tight joint between the top plate of the receptacleFand the top plate, G, ofthe furnace, thus providing aspace, H, between the plates,which is lled with lire-clay or non-conducting material. The dry steam is conveyed through the pipe h2 to the radiators in the building to be heated. The tubes E, which are located concentrically around the magazine, are pron vided internally with tubes E', of less diameter than the openings in the outer tubes, and the bases of these inner tubes are bifurcated, as shown in dotted lines in Fig. 4, so that the water may circulate freely between the same, and the upper portion of the outer tubes is screw-threaded, so that a tight joint can be made between them and the bottom plate of the receptacle F. The inner sides of the tube which are adjacent t0 the outer edge of the magazine are beveled, as shown in Fig. 4, so that the coal will feed itself automatically upon the grate B, and willv not become clogged, as is often the case where the walls of the firepot are straight.

I represents tubes which are located at the rear part of the furnace and extend upwardly into the water-receptacle F, said tubes having strips j located between the same, so that they will form at the rear of the furnace a comparatively tight wall, and these tubes are extended' at their sides, so that the air and products of combustion can pass over the upper portions of the same. The center tube, I', extends upwardly into the water receptacle F, and the water to supply the same is fed through this tube. The tubes I, adjacent thereto, are provided at their lower portions with blowoff cocks la, for withdrawing any sediment from the same. It is not necessary to provide the other tubes with these blow-off cocks, asthe circulation of the water within those forming the sides of' the fire-pot is so great that the sediment will not collect therein.

The steam,after being generated in the tubes E, passes through the water in the receptacle and enters the steam-space, out of which it passes through the pipe h. The casting f is provided at its lower edge with a groove or recess, f which will collect the gases and convey the same to the tube h, from whence they are drawn to the ash-pit.

When the boiler and furnace are operating at their full capacity, the draft door D is shown in Fig. l. The air then passes upward through the fuel and allows the products of combustion to circulate around and between the vertical tubes E, said products of combustien passing over the tops of the shoulders of the tubes I I, and from thence downwardly behind the same and through the opening e to the chimney. Air will pass from the ashpit into the opening h', and through. the pipe h upon the upper part of the fuel, so as to furnish the same with a supply of air.

When the damper is closed,the airzfrom the ash-pit will have a direct passage to the chimney, and the gases which may accumulate above the coal will be drawn through the pipe h into the ash-pit while the products of combustion pass, as hereinbefore described, behind the tubes I I-, and around the damper to the chimney.

Ina boiler constructed as hcreinbefore described, as the coal burns out,.the heat upon the tubes does not vary materially, and the heat will always be sufficient to keep the steam generating in the boiler.

By having the tube Iextend above the bottorn of the water-receptacle all the water cannot be drawn from the receptacle.

I claiml. In a'magazine-boiler, the tubes E, beveled on the inner side below the base of the magazine, substantially as shown, and for the y purpose set forth.

2. In a furnace, a steam-generating device, the base A,constructed substantially as shown, and provided with perforations for the reception of lugs formed upon the ends of the depending tubes E, said tubes being attached to a water-receptacle which surrounds the upper portion of the magazine F', the tubes I and I', forming a compartment near the rear portion of the outer casing, substantially as shown,and for the purpose set forth.

3. The combination, with the tubes E, beveledl on their inner sides below the base of the magazine, and attached to the water-receptacle, and also provided with central openings, of the inner tubes bifurcated at their lower portion, substantially as and for the purposes specified.

In testimony whereof I affix my signature in presence of two witnesses.

FREDRIG J. FURMAN.

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