US1440071A - Furnace - Google Patents

Description

arianna: A. alientan, or ronfrnann, onneoit.`

nommen.

Application filed inventer `s, i921. serial no. 513,655.

To all w/lom. imag/concern.'

Be it known that l, ALBERT A. Geiiinma citizen of the United States, residing at Portland, county of Multnomah, State of Oregon, have invented certain new and useful improvements in Furnaceaof which the following is a specincation.

My invention relates to furnaces 'in general, and to hot air furnaces in particular, the object being to provide themost coinplete combustion of the fuel and the employment of the greatest possible heat units iii-` the products of combustion.4

l accomplish the above object by means of the construction illustrated in the accompanying drawing, which is a part of'tliis application for etters Patent, like characters of reference indicating. like parts throughout the several views thereof, and iii, which:

Figfl is a perspective view of a furnace embodying` my invention, parts being broken away to illustrate the construction: `Fig. I2

is a sectional plan view'iiponthe line 2-2 of Fig. 1 Fig". 3 is a. sectional elevation upon theA line 3 3 of Fig. 1 is a sectional elevation ofthe fuel door and draft device thereon: Fig. 5 is a plaiiview of the grate.

The outer `casing 6 of my furnace is of oblong form with substantially semicircular ends, the fire box and comluistion chamber being mounted substantially in the center of said casing. upper and lower horizontally disposed plates 7 and 8 respectively, each plate having an oblong orifice therein. Surrounding said orifice in the upper plate 7 is a dome structure 9, closed at the upper end thereof, and within the orifice in the lower plate 8 is disposed a grate of novel construction.

,it each end of the oblongori'ceviu said limer plate tl is a semicirculai' dished grate member 10, said inen'ibers being jeinedbv side members 1l, the upper edges of each of said dished members and side ntiembers being rolled to form a ledge adapted to contact with the edge of the orifice in the lower plate S and thus support said grate inem-` beis. Centrally disposed relative to` said side niei'i'ibers 11 are two solid grate bars 12, each supported at its ends by the adjacent dished members 10, and intermediate each of said solid bars and the adjacent side member 11 is an. open or barred grate member 123 also supported at the ends thereof upon the adjacent dished members 10.

The fire boi: is composed ofV That portion of each of the plates 7 `and 8 lying outside the Adome 9 and grate members 10-'and11 are connected by pipes or tubes 1i, and outside said tubes the plates 7 and 8 are connected by a vertically disposed plate 15 completely surrounding said tubes. A spaceis yleft between said plate 15 and the casing 6 entirely surrounding the fire box except at the front end thereof, at which point the plate 15 and casing 6 are brought into contact one with the other, as shown in Figs. 1 and 2.`

Beneath the grate is ythe usual ash receptacle 15 with the ash door 16 thereon.

` Closing the upper end of the casing 6 are two plate members 17 and 18 joined together `by a tongue and groove construction 19, the

forwardly disposed member 18 having thereon the hot air pipe 2O wherefroin hot air is delivered from the furnace.

A stack, 21`is introduced into the fire box adj acent' its lower plate 8, and a pipe 22 also connects the stack with the `dome 9, there .being a damper 23 in saidpipe.

`The fuel door fof the fire box is of novel construction'adapted to coact with the above described `novel form of grate to provide` complete combustion. Saidy doorv is composed of an outer member 25 completely closing the door aperture in the fire box, and having thereon an air duct entering adjacei'it'tlie top of the door and extending downward thereon to open adjacent the bottom of the door, as shown at 26, the opening of said duc-t into the `atmosphere being closed by a door 27. Uponthe inner member 28 of said door inclosing the duct 26 is secured a plate 29, there being a small space 30 inteiyening` between saidplate 29 and said member 28.

When the lire is lighted in the furnace, that jiioition of the fuel above the barred grate members 13 will burn rapidly because of the draft coming up through the grate inembers 13, while that portion of the fuel upon the solid grate members 12 will burn very slowly, gases being liberated from said latter fuel portion by means of the heat generated by the rapidly burning fuel portion. As the gases liberated from the centrally disposed portion of fuel rise oxygen for their combustion is furnished by the draft of air entering the duct 26. rllhe plate 29 becomes highlyheated, and as the air enters the fire box from duct 26 it impinges upon the lower end of said plate, and is thereby heated, the result being that a portion of said air is directed upward through the space 3Q, and emerging from the top thereof is directed upon the products of combustion` within the top of the fire box, thereby providing oxygen therefor and resultant complete combustion.

The greater portion of the products of combustion ascend into the dome 9 impart ing,` a large portion of their heat thereto, and being thereby cooled they descend along the walls of said vdome back into the fire lbox and thence outward between the tubes 1 4 into the space between said tubes and the fire box plate l5, imparting more of their heat to the tubes 14; when passing therebetween and to the plate l5 as they/"i-mpinge thereupon. By the time thecooli-ng products of combustion have descended sufficiently to reach the stack 21 they have parted with the major portion of their heat to the dome, tubes and re boX plate.

The air to be heated enters the furnace casing G at 3l and passes upward to the delivery pipe 20, some by way of the space between said casing' 6` and the plate 15, `and some through the tubes le, being thus highly heated upon reaching the pipe 20.

The pipe 22 and damper 23 are used when starting' the fire to provide a direct passage for the products of combustion before the furnace is thoroughly heated. 4

By this construction I obtain three essential features: First very large heatingl surface due to the platell, tubes ltalnd dome 9: second very complete combustion due to the `novel construction of the grate and fire box door: Third effective exhaustion of the heat units within the products of combustion by having the stack remove the saine fromsubstantially the leve-l of the re box floor.

My device may be made of any size, and constructed of any'materials deemed con venient andsuitable for a device of this chaiacter, and while I have illustrated and described a form of construction and arrangement of parts found desirable in materializing my invention, I wish to include in this application all mechanical equivalents and substitutes that may fairly be considered to come within the-scope and purview of my invention as defined in the appended claim.

Having disclosed myv invention so that others may be enabled to construct and to use the same, what I claim as new, and desire to secure by Letters Patent is:

In a furnace fire box: horizontally disposed plates connected by a vertical peripherally disposed plate; a plurality of air tubes connecting said horizontal plates adacent said vertical plate; a single dome rising from the upper of said verticalplates within the space occupied by said tubes said dome 'being closed at the top thereof; dished grate members supported by the lower of said horizontal plates; solid grate members centrally disposed upon ysaid dished meinbers; barred grate members disposed upon each side of said solid grate members; a stack leading from said lire box substantially at the level of the lower of said horizontal plates; and a door having two vertically dis- ALBERT A. GABRIEL.

lIitnesses C. F. BLAKE, Lnvi J. RoniNsoN.

Images