US1008526A - Water-tube boiler. - Google Patents

Description

through the boiler, whereby the heating UNITE srars ran'r rich.

GEORGE COOK, BUFFALO, NEW YORK.

WATER-TUBE BOILER.

To all whom it may concern:

ful Improvements in WVater-Tube Boilers;

and I do hereby declare the following to be? a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to water-tube boilers; of the type shown in my Patent, No. 566,500,, dated August 25, 1896, and is designated as an improvement over this patented boiler.

The principal ob ects of the invention are to secure a better circulation of water capacity thereof is increased, and to simplify the construction so that the boiler will be cheaper to manufacture and can be more quickly put together or erected.

Other objects will become apparent from;

' the following description.

bination, with the usual inner and outer shells of the boiler, of a plurality of cast metal open work water circulating frames arranged transversely within the inner shell and having the tubes of each frame in line with openings in the frame above and below, as the case may be, or both above and below, these frames having communication with the water space between said shells and through which the water is adapted to circulate; the products of combustion having free access to the tubes of, said frames because they are obliged to pass through the interstices or openings between said tubes.

My invention also consists in the features of construction and combination of parts hereinafter described and specified in the claims.

In the accompanying drawing illustrating the preferred embodiment of my invention: Figure 1 is a central vertical sectional view of a boiler constructed in accordance with my invention. Fig. 2 is a cross section on the line 00-02 of Fig. 1. Fig. 3 is a similar view showing a modified construction of cast metal frame which may be substituted for the form shown in Figs. 1 and 2, if desired, and, Fig. 4 is an enlarged detailed view Specification of Letters Patent.

Application filed April 28, 1909.

Patented Nov. 14, 1911.

Serial No. 492,652.

showing the application of the short tube sections which connect each of the cast metal frames to the inner shell.

The inner and outer shells 1 and 2, respectively, are round in cross section so that the general shape of the boiler is cylindrical. The lower portion of the interior of the inner shell comprises the fire box 3, to which access is had through the door 4, and door frame 5, the latter having watertight joints with the inner and outer shells. The smoke stack includes a pipe section 5 extending through the center of the tops of the inner and outer shells'with which it has water-tight joints. Stay bolts 6 are preferably placed at intervals between the tops of the inner and outer shells and may be employed at any other points where they are found to be necessary. Cast metal circulating frames 7 are placed transversely within the inner shell at suitable intervals. Each frame, as shown in Figs. 1 and 2, comprises a circular tube 8 at the outer edge I thereof and a series of cross tubes 9 ar- The inventlon consists broadlyof the com-;

.10 leading to the interior of the circular tube 8 and extending outward into close proximity with the interior surface of the inner shell. I have shown six of these collars on each frame as being the preferable number, but more or less may be employed, if necessary or desirable. These collars are cast integral with the frames but are preferably made with thicker walls than the tubes to stand the expansion therein of the short tube sections 11 which connect the frames to the inner shell and are the only means for holding these frames in place; thus permitting easier removal of said frames without disarranging other parts. This results in a very simple boiler wherein repairs can be easily made, since each part is separately detachable. The collars 10 also serve to center the frames in the inner shell. The openings in the inner shell to receive these short tube sections are so placed as to give the frames a slight incline, as shown in Fig. 1, which facilitates the circulation of the water through the frames. Hand holes 12 are provided in the outer shell opposite the short tube sections.

In putting the boiler together, each of the frames is introduced into the shell, brought to proper position opposite the openings in said shell and secured in place by inserting the short tube sections through the hand holes in the outer shell and expanding said tube sections to make water-tight joints with the collars 10 and the inner shell. The openings 12 in the outer shell are normally closed by plugs 13. Each of the frames 7 may be turned with respect to the one next to it so that the cross pipes of the several frames will be staggered, or in other words, so that these cross pipes will be directed across the openings or interstices in the frames directly beneath, which tends to increase the heating capacity of the boiler by compelling the products of combustion to take tortuous passages among said cross pipes from the fire box to the smoke pipe. Short tubes 14 are placed between the inner and outer shells, one being preferably arranged intermediate of each pair of adjacentframes, for the purpose of introducing steam or water for cleaning said frames and the interior of the boiler. These tubes 14 are normally closed by plugs 15.

As illustrated in Fig. 3, the frames may be made of a series of concentric circular tubes 16 connected by radial tubes 17 in a sort of cob-web fashion instead of the network of cross pipes shown in Fig. 2. The frames made in this modified form may be staggered with respect to one another and secured to the inner shell in the same manner as already described in connection with the preferred form.

I claim 1. In a water tube boiler, the combination with upright inner and outer shells separated by a water space, a fire box at the bottom of the inner shell and a smoke pipe at the upper end of said inner shell, of a cast metal water circulating frame arranged transversely in the inner shell between said fire box and said smoke pipe and in communication with said water space, a tube for introducing steam or water to the exterior of said circulating frame and the interior of the inner shell to cleanse both, said tube connecting said outer shell with said inner shell and positioned in aplane beneath said smoke pipe and means for closing the outer end of said tube for the purpose specified.

2. In a water tube boiler, the combination with upright outer and inner shells separated by a water space, a fire box at the bottom of said inner shell and a smoke pipe at the upper end of said inner shell, of a plu rality of cast metal water circulating frames arranged transversely in the inner shell between said fire box and said smoke pipe and in communication with said water space, a tube for introducing steam or water to the exterior of said circulating frame and the interior of the inner shell and positioned in a plane between said water circulating frames and means for closing the outer end of said tube.

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

GEORGE COOK. \Vitnesses:

J osnrrr R. EDSON, A. M. PARKINS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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