US168174A

US168174A - Improvement in furnaces

Info

Publication number: US168174A
Authority: US
Publication date: 1875-09-28
Anticipated expiration: 1892-09-28

Description

NATHAN L. NEwooMB,

PATENT OFFICE.

or CLEVELAND, oHIo.

IMPROVEMENT IN FURNACES.

Specification forming part-of Letters Patent No. 168,174, dated September 28,1875; application filed August 12, 1875.

To all whom it may concern:

Be itl known that I, NATHAN L. NEwooMB, of Cleveland, in the county of Cuyahoga and Stateof Ohio, have invented certain new and useful Improvements in Furnaces for Steam- Boiler, Sto.; and Ido hereby declare the fol- Vlowing to be a full, clear, and exact descripdinary tubular-'due boiler; Fig. 2, a cross-sec.l

tion of same; Fig. 3, a longitudinal section of my invention as adapted to the common return-line boiler.

. My invention consists in the following parts and combinations, as hereinafter specified and claimed, wherein- A is the furnace or lire-box, for instance, of a locomotive, as shown in the drawings, with its crown-sheet A and'tubular ilues A,.grate bars a, and ash-pita. B isa fire-wall, constructed, preferably, of masonry, or of any suitable material of sufficient strength, and capable of resisting the effect of heat. From the bottom or lower portion of the re-wall B exf tend the iiues C, of any suitable construction and material. These iiues are provided with valves C', to regulatev the amount and. force of air .passing through them. These flues may be one or more in number, and are made to open in a forward direction above the tire-wall B, as shown inFigs. l and 3.

It is only necessary to change the fashion without substantially altering the construction, and without at all affecting or changing the principle of my invention, in order to adapt it to furnaces or boilers of different yconstruction, my invention consisting, as it does, essentially in the fire-wall B, placed within the furnace, and provided with one or more lines, C, opening at or near the bottom of the relwall B, extending upward, and opening forward above said firewall.

The operation of my invention is as follows: The air passing to the lower mouth'of the flue C becomes thoroughly heated before it is discharged at the upper exit thereof. This air, thus heated and discharged, aifords a supply of oxygen sufficient to assist very materially in the combustion of such matter as has not already been burned upon the grate-bars or within the fire-box before reaching this point.

The advantages that I claim for my invention, besides all that can be claimed for any device affording a more or less perfect and complete combustion, are, first, extreme simplicity; second, durability; third, its easy adaptation to furnaces of almost any construction; fourth, its automatic operation; fifth, by my invention an exceedingly small grate-surface is required, and likewise a very moderate draft of air beneath or over the grate-bars,

consequently an immense saving of fuel 'and a diminished liability of burning. the gratebars.

The door of the chamber is supplied with an upper and a logver series of draft-openings. Whenthe fire is started all are opened; but afterward the upper series should be closed,

and the vlower series will not only sufficiently assist in the required supply of oxygen, but will also save materially in preventing the fender of the'furnace-door from beingl burned.

- y In a furnace where no exhaust-draft is employed, as in the case of a locomotive-flue, con-V nection may be made between the lower mouths of the dues C and any suitable vent or other contrivance whereby air may be arti- 1. The combination, with afurnace, of one or more flues, G, adapted to receive air from under the, grate, and to discharge it within the furnace above the grate-bars, substantially as and for the purpose shown.

2. The combination, with Jthe furnace, of the Intestimony whereof I have signed my name 'fire-wall B, placed immediately behind the tov this specification in thevpresenceI'of-two subgrate-bars, and extending well up into said scribing Witnesses.

furnace and one or more flues C receiviu g air fron: below, and discharging tat the up- NATHAN L' NEWCOMB' per portion of said lire-wall and over the grate- Witnesses:

bars, substantially as and for the purpose de- FRANCIS TOUMEY,

scribed. H. T. HOWER.