US593921A - Steam-boiler - Google Patents

Description

' (No Model.) 2 SheetsSheet 1.

A. B. BURNS & J. T. KETGHUM. STEAM BOILER eerZiBur/aa :Zims f iddizmz orgey '5,

(No Model.) 2 She etsSheet 2.

A. B. BURNS & J. T. KETOHUM.

STEAM BOILER.

No. 593,921. Patented Nov. 16, 1897.

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ALEXANDER B. BURNS AND JAMES T. KETOHUM, OF BAY,

' WISCONSIN.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 593,921, dated November 16, 1897.

I Application filed March 17, 1897. Serial No. 627,951. (No model.)

To all whom it may concern- Be it known that we, ALEXANDER B. BURNS and J AMES T. KETCHUM,GitiZenS of the United States, residing at Green Bay, in the county of Brown and State of Visconsin, have invented a new and useful SteamJBoiler, of which the following is a specification.

This invention relates to steam-boilers and it has for its object to effect certain new and useful improvements in boilers of that character that are designed for either power, steam, or hot-water heating;

To this end the main and primary object of the invention is to so construct a boiler of this type whereby all of the heating-surfaces will be exposed to the direct contact of the fire and hot gases, thereby insuring economy of fuel, and also providing a construction in which-every part of the heating-surfaces may be readily accessible and easily cleaned.

W'ith these and other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination,

and arrangement of parts hereinafter more fully described, illustrated, and claimed.

In the drawings, Figure l is a perspective View of a boiler constructed in accordance with this invention. Fig. 2 is a vertical longitudinal sectional view thereof. Fig. 3 is a top plan View. Fig. 4 is a front end View of the boiler.

Referring to the accompanying drawings,

' 1 designates a suitable boiler-furnace having that the upper side of the front smaller shellsection 6 is substantially in a line with the upper side of the rear larger shell-section 5,

with the lower portion of the rear large section 5 projecting materially below the lower side of the front smaller section 6, as clearly illustrated in Figs. 1, 2, and 4 of the drawings.

The two sections 5 and 6 of the boiler are in direct'communication with each other and are joined or united together by an intermediate crescent-shaped head-plate 7, which is securely riveted to the adjacent end edges of the said shell- sections 5 and 6, and the boilerbody is completed by the front and rear headplates 8 and 9, respectively fitted to the front end of the shell-section 6 and to the rear end of the rear shell-section 5. The severalheadplates 7, 8, and 9 form the flue-sheets of the boiler, and a series of long return-fines 10 extend the entire length of the boiler 4 and are fitted at their opposite ends, respectively, in the endhead-plates or flue- sheets 8 and 9, and a series of shorter fire-fines 11 extend only the length of the rear shell-section 5 and are fitted at their ends, respectively, in the rear head-plate 9 and the intermediate'crescentshaped head-plate 7, which forms a connection between the adjacent ends of the separate sections of the boiler.

A smoke-box extension 12 is fitted tothe rear end of the boiler and incloses a space beyond the rear ends of all of the fines 10 and 11 to provide for directing the fire and hot gases which escape out of the rear ends of the fines 11 into the rear ends of the returnflues 10, as will be readily understood by those skilled in the art.

The boiler-body being constructed as described, with both shells thereof ona circle,

the strain is equal and no stay-bolts are required, and at this point it is to be noted that the front shell-section 6 of the boiler extends the full length of the fire-box 3 and forms a crownsheet therefor, whereby the entire lower side of the front small section of the boiler will be subjected to the direct action of the fire and hot gases, and the lower front end portion of the rear section 5, formed by the intermediate head-plate '7, is disposed immediately above the grate-line at the rear side of the fire-box and forms the rear wall of said fire-box, so that all of the fire and hot gases from the fire-box are compelled to pass directly into the front ends of the short firefiues 11, and practically no heat whatever is lost, but passes directly inside of the boiler.

In connection with the front smaller shellsection 6 of the boiler is employed a pair of header-pipes 13, arranged, respectively, at opposite sides of the grate 2, immediately above the grate-1i ne,and said opposite headerpipes 13 have coupled thereto the lower ends of a vertical series of circulating-pipes 14, arranged in separate series at opposite sides of the fire-box and forming the side walls of the said fire-box. The series of vertical circulating pipes or tubes 14; at one side of the firebox extend upward from their point of connection with one of the pipes 13 and are connected with one side of the shell-section 0, as at 15, at a point about on a line with the top row of lines 10, while the circulating pipes or tubes 1% at the opposite side of the fire-box are connected at their upper ends, as at 16, with one side of the shell-section b at a point about on a line with the lower row of fiues 10, whereby a continuouscirculation of water can be maintained within the boiler and through the opposite sets or series of pipes or tubes 14., it being noted that said opposite sets of pipes or tubes 1; are directly adjacent to the lire-surface and are naturally subjected to the direct in fluence of heat therefrom.

The opposite header-pipes 13 for the opposite sets of circulating pipes or tubes 14 are connected at their rear ends with a trans verse bridge-wall pipe 17, which is arranged at the rear side of the grate 2, directly under the front lower side of the shell-section 5, to form the bridge-wall for the tire box or chamber, while at the same time to assist in heating up the water circulated therein, and the said bridge-wall pipe 17 is suitably connected at its opposite ends with a return-piping frame 18, having a connection 19 with the lower side of the large shell-section 5 and feed-pipe connections 30, as plainly illustrated in the drawings.

The herein-described construction of boiler, in combination with the particular piping described, provides alarge heatingarea exposed directly to the fire and therefore necessarily provides for a uniform and rapid heating of the water within the boiler and the pipes connected therewith,thereby rendering the boiler especially available for power, steam, or hotwater heating.

The smoke-box extension 12 may be providcd at one side with double doors 13, and any changes in the form, proportion, and the minor details of construction may be resorted to Without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described the invention, what is claimed, and desired to be secured by Letters Patent, is

1. In a boiler, the combination with a f urnace and the fire-grate therein; of the boiler proper essentially comprising separate shellseetions of different diameter and eccentrically disposed, and the fire-fines extending the entire length of the boiler and also through the lower part of the larger section, the smaller section of the boiler forming the crown-shect for the fire-box above the grate, and the lower front end portion of the large section forming the rear wall of the fire-boximmediatel y above the grate-line, a transverse bridge-Wall pipe arranged directly under the front lower side of the larger shell-section, and circulatingpi pc connections with said transverse bridgewall pipe, substantially as set forth.

2. The combination with a boiler-furnace and the fire-grate therein; of a boiler essentially comprising separate eecentrically-disposed shell-sections of different diam eter, and the fire-fines xtendin g through the entire length of the boiler, and also through the lower part of the large section, the smaller section of the boilerlyin g above the fire-grate, and the lower front end portion of the larger section being disposed at the rear side of the grate immediately above the grate-line, a transverse bridge-wall pipe arranged under the front lower side of the larger shell-section, opposite header pipes connected with the bridge-wall pipe and arranged at opposite sides of the grate, a return-piping frame connected with the bridge-wall pipe and with the lower side of the large shell-section, and opposite sets or series of vertical circulatingpipes connected at their lower ends with said header-pipes and at their upper ends to opposite sides of the smaller shell-section, respectively at points about on a line with the top and bottom rows of fines in such section, substantially as set forth.

In testimony that we claim the foregoing as our own we have hereto aflixcd our signatures in the presence of witnesses.

ALEXANDER I BURNS. JAMES T. KETCIIUM.

\Vitnesses:

CHARLES E. BURNS, HERBERT T. CAMM, WM. LARSEN.

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