US535116A - Matthew robert moore - Google Patents

Description

(No Model.)

M. R. MOORE.I STEAM BOILER.

No. 535,116. PatentedMgy. 5, 1895.

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MATTHEIV ROBERT MOORE, OF INDIANAPOLIS, INDIANA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 535,116, dated March 5, 1 895. Application tiled August 4, 1893. Renewed January 31,-1895. Serial No. 536,889. (No model.)

T0 all whom it may concern.-

Be it known that I, MATTHEW ROBERT MOORE, a citizen of the United States, residing at Indianapolis, inthe county of Marion and State of Indiana, have invented acertain new and useful Improvement in Steam-Boilers, of which the following is a specification.

The improvement applies to that class of boilers in which there is a horizontal drum of sufficient length at a high level, containing water and steam, two short nearly horizontal drums, one under each end of the former, and pipes connecting the whole so that the water shall circulate actively, and that the steam generated mainly 4in the lower short drums and inclined pipes which connect them shall be separated from the water in traversing the long upper drum. I have invented improvements in the details. I make the ascending and descending tubes curved, and am able thereby to better expand them into the curved plates above and below, provide greater area of tubes and greater area of the spaces for the movement of hot gases between them and allow more elasticity in the connection- I suspend the boiler by tierods, which by swinging can change their positions to allow for expansion and contraction. I provide a perforated arch which shields the boiler, and insures the ignition of combustible gases, and deectors which promote the circulation of the gases among the ascending tubes. I provide therewith baffle-plates to promote the presentation of the gases to the nearly horizontal tubes. I arrange therewith for the exit of the gases through the spaces between the descending tubes.

The accompanying drawings form a part of this specification and represent what I consider the best means of carrying out the invention.

Figure l is a vertical section in two planes. The left side of the center is on the line an in Fig. 2. The right-hand side is on the line y 'y in the same figure. Fig. 2 isa central ver tical longitudinal section.

Similar letters oi. reference indicate like parts in both the figures.

A, A, are substantial masonry walls, certain portions being designated, when necessary,

by supernumerals.

A" is an arch of fire-brick, extending over the grate A at a proper height to allow a sufticient tire-place or furnace proper below. This [ire-arch is liberally perforated near each side. It is maintained at a high temperature and serves to insure the ignition of any combustible gases which have been supplied with air by any ordinary or suitable means as they flow upward to heat the boiler.

A2, A2, are deflectors extending inward from the wall of masonry at a proper height, and A3 is the top arch.

B, B, are transverse girders of iron resting on the Walls of masonry, and suspending the boiler by means ot' tie-rods O. The perforated arch A is alittle lower at the back edge than at the front, and only extends rearward to about the same extent as the grate. A large proportion of the gases rising from the tire on the grate below flows upward through the liberal apertures a. Another large proportion rises through the entirely open space between the back edge of this arch and the firebridge A4.

Two short drums D and E are arranged nearly horizontally at a proper distance apart, connected by slightly inclined tubes F. The front drum D lies directly over the ii re, being partially shielded therefrom by the iire-arch A. Curved pipes G extend upward from this short drum D and connect to the long horizontal drum I, in which latter the steam and water separate, and which I will forbrevity term the steam drum. A liberal number of curved pipes J connect the rear end of this drum I with the short drum E. A portion of the hot gases rising from the lire Hows upward around the front drum D and circulate among the pipes G, their intimate contact with these latter pipes being insured by the deflectors A2. After moving among these pipes this portion of the hot gases moves rearward under and around the upper drum I. Two nearly horizontal baffleplates K and L are interposed at proper levels and compel the remainder of the hot gases rising from the furnace to move rearward and again forward in contact with the pipes F. After circulating among these pipes, this portion of the gases thus circulated rise and mingle with the other portion and flow rear- IOO ward, also bathing the upper drum I. All the gaseous products of combustion finally move rearward through the spaces between the pipes J andare discharged through a {iue a immediately in rear of these pipes. The draft is controlled by a damper M.

The feedswater is introduced by ordinary means in one of the lower drums, and the steam is taken from the upper drum I, provided with a safety-valve. It will be understood that there are all the ordinary or usual connections, as gage-cocks, one or more glass gages, mud-drums, hand-holes and covers.

The outer ends of the drums D and E are connected by a number of properly distributed stay-rods N extending through correspending pipes F. 4

The curvature ofthe pipes G and J serves four important ends: facilitating the connection of the ytubes to the cylindrical surfaces of the drums above and below, increasing the elasticity of the connection to allow for variations in expansion and contraction, increasing the spaces between the pipes to allow a free circulation ot' the gaseous products of combustion,and allowing for greatly increasing the area of the steam and water connections so that the rise of the steam in these pipes may be slow, and may throw up but little water. The arch A', liberally perforated along each edge and less liberally perforated near the middle, not only increases the certainty of the combustion of the gases but shields the lower face of the drum D from being over-heated. The ties O connecting the girders B with lugs riveted ou the sides of the short drums D and E support the weight efficiently on the masonry walls and by slight deflections of the ties al low for changes in position of the parts in consequence of expansion and contraction, or settling, or other` cause.

I attach importance to the horizontal arrangement of the baffle-plates K and L as distinguished from the vertical baffle-plates more commonly used, because my arrangement avoids the labor of perforating and fitting, offers less obstructions to the draft, abstracts the heat of the gases more thoroughly before allowing them to rise and bathe the steam room of the upper or steam drum, and finally presents the partially cooled gases so as to bathe the whole length of the steam drum therewith, thus utilizing their remaining heat very effectually.

Modifications may be made without departing from the principle or sacrificing the advantages of the invention. I prefer that the fire-arch A and the grate A shall be equally inclined, and that the inclination be to the same extent as the drums D and E and tubes F, as shown, but this condition is not material.

I claim as my inventionl. A boiler comprising a long horizontal steam drum, two shorter water drums, a series of nearly upright curved water tubes connecting each of said water drums with said steam drum, and a series of nearly horizontal water tubes connecting said water drums with each other, in combination with the perforated arch A over the furnace with an open space in the rear thereof, the horizontal baffleplates K, L, arranged among the said horizontal tubes the whole being disposed as shown so as to divide the gaseous products of combustion and allow a portion to rise directly to traverse among the front series of said upright tubes while another portion is led away horizontally to traverse among said horizontal tubes, and a flue for the final discharge of the products of combustion, arranged opposite the space between the rearmost water drum and the steam drum so that all shall be finally discharged through the spaces between the rearmost upright tubes, all substantially as herein specified.

2. A boiler comprising a steam drum, two water drums, and nearly horizontal tubes and nearly upright curved tubes connecting the whole, in combination with the furnace walls with deliectors A2 therein, a perforated arch under the front water drum, baffle-plates horizontally disposed among said horizontal water ftubes, cross glrders B above the whole and suspension rods() from such girders supporting the rearmost water drum, all arranged to serve substantially as herein described.

In testimony that I claim the invention above set forth I affix my signature in presence of two witnesses.

MATTHEW ROBERT MOORE.

Witnesses:

T. R. KAOKLEY, R. M. OOFFIN.

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