US378061A - wolfe - Google Patents

Description

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G. G. W0LPB.

HOT AIR PURNAGE.

No. 378,061. v Patented Feb. 14, 188,8;

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' ANITED STATES' PATENT GuRDoN e. VWOLEE, OE rrROY, NEw YORK, JAssIeNOR r.ro THE FULLER a y WARREN COMPANY, OE SAME PLACE.

HOT-AIR FURNAOE.

SPECIFICATION forming part of Letters Patent No. 378.061, dated February 14', 1888.

Application filed october 2s, was. serial No. 217,483. (No model.)

To aZZ whom, it may concern:

Be it known that I, GURDON G. WOLFE, of the city of Troy, county of Rensselaer, State of New York, have invented new and useful Improvements infHotAir Furnaces, of which the following is a specification.

I My invention relates to improvements in hotair furnaces; and these improvements have for their object the better and more uniform distribution to the radiating-dues of the heat evolved from the fire-pot by an improved-construction of said ilues as to their comparative size and relative arrangement with reference to the exit-pipe, and the production by construction of a novel and efcient means to prevent the dust and ashes thrown out of the furnace from escaping into the room while the grate is being cleared of ashes and clinker, and in the construction and novel arrangement of parts to produce adirect draft from the fire pot or cylinder to the exit.

As the radiating-dues of hotair furnaces are usually made, they are constructed to all have the same transverse area as to size and capacity, and as thus made those of them which furnish the most direct passage for the heated products of the fire to the exit-pipe carry off a larger part of the heat, while those most remote from the exit receive and radiate to the passing air much less of the heat, which unequal distribution Of the latter renders the action of the furnace irregular, it being a wellknown law that the heat generated by the fire in a hot-air furnace and under the draft in1- pulse Of a chimney will take the most direct course to theeXit; and to remedy this difficulty by an improved means of construction and arrangement of the dues with reference to the latter is one of the purposes of my invention.

Accompanying this specification, to' form a part of it, there are three sheets of drawings, containing nine figures, illustrating my invention, with the same designation of parts byletler-reference used in all offthem.

Of these illustrations, Figure l is a perspective ofthe combustion-chamber top, its dome, and upcast vertical fine parts, showing, also, as separated from the latter a ring-form top flue having a connected cross-flue and depending vertical iiue parts that connect with the vertical flue parts of the combustion-chamber, but in'this illustration being shown as pulled apart from their connection, and with part of the ring-form fine shown as broken out. Fig. 2 shows a central transversesectional view of the ring-form top lueand its diametricallyarranged cross-flue and exit. Fig. 3 is a central vertical section of my improved furnace,taken from front torear, with one-half of the firegrate shown in side elevation. Fig. 4 is atop View of the vertical flue parts and dome, illustrating, also, a means for operating a direct draft from the fire-pot to the top iue by means of a damper arranged in an opening in the `dome-top. Fig. 5 is a front elevation of a guide-plate in which the dust-damper audits connections move. Fig. 6 is a longitudinal vertical section taken through the dust.

damper, its link-plate, -latch-plate, and the latch on the door of the clinker-cleaning opening or passage, by which door as it is opened or closed the dust-damper is operated. Fig. 7 is aperspective view of the dustdam per. Fig. 8 shows as detached the link-plate thatconnects the dust-damper with the latch-plate.

Fig. 9 is a top view of the dust-damper, its

connections, and thehnged door of the clinkercleaning passage.

The several parts of the hot-'air furnace thus illustrated, as well as those containing my invention, are designated by reference-letters, and the function of the vparts is described as follows:

The letter S designates the exterior shell of the furnace; A, the ash-pit; G, the fire-grate;

P, the fire-pot or lire-cylinder, and C the comY y bustion-chamber.

The letter D indicates the dome formed in the top of the combustiouchamber, and N the i IOO arranged diametrically with reference to the ring-form flue, andat one of vits ends this crossilue connects interiorly with the latter and at its other end it is continued through said ringform flue to produce the exit E by means of the interiorly-placed vertical partition-plates 1' I, that are arranged to close up the ring-form ilue thereat, and leaving an intervening area between said plate and within the ring R2, so as to make a continuation of the cross-flue M leading to the exit.

The letter gl designates a flue that is formed on and connects with the cross-tine M from the under side of the latter, and is made to extend downwardly to connect with the top of the dome D by means of an opening, O2, made in the top of the dome.

The letter dZ designates a damper that is arranged in the flue g2, and this damper is con structedwith a damper-rod, i", which passes exteriorly to the front. When this damper d is closed, the heated products coming from the fire are caused to pass indirectly to the exit through the ring-form flue R to the crossflue M and to the exit; but when this damper is opened, then the heated gases from the fire pass directly to` the cross-flue, and thence tothe exit.

The letter a designates a ilue part that is extended downwardly from that part of the flue-ring R2 which incloses the ring-form flue R where the continuation of the ue M is made in the ring R. At its upper end this flue part a opens into the ilue M, and at its lower end it is adapted to connect with any of the flue parts that are upcast from the combustionchamber. The flue parts p p2 p3, that are downcast from the horizontal ring-form flue R, are arranged on the under side of that diametrical half of the latter which is opposite to that wherefrom the continuation of the flue M emerges to produce the exit E, but which is nearest to the connection made between the said ringform ilue and the cross-flue whereon the exit is formed, so that the heat passing through said f flue partsppipBhas but a short distance to move before it reaches the exit E. The transverse flue-area of each of these Iiue parts p' p p3 is made smaller than the flue-areas of the line parts a2 aa,for the purpose of reducing the area of luepassage of such of the yfine parts as have the most direct and shortest passage to the exit, and making larger comparatively those flueareas from which the passing heat has the longest and most indirect passage to the exit. The flue part a being arranged in that part of the ring R2 which forms the continuation of the cross-flue M, and which at its upper end connects with the latter, is made with a diaphragm-plate, mt, having the small flue-passage a. This diaphragm-plate m, with the small flue-passage as, gives to the lflue Va a smaller area than those lines which are farther from the line of direct draft, and operates to equalize and distribute the drafts in the direction of the other dues. The combustion-chamber C is roofed in by the dome D and the up Wafldlylprojected and linwardly-tapering flue parts'F F2 F3 F* F5 F. These flue parts connect at their upper ends with the pendcntue parts formed on the ring R2, and indicated at p pi p and a a2 @wherever the said flue parts come vertically opposite. The upcast flue parts of the coinbustionchamber all have the same transverse area at their upper ends, and each of them thereat is made with an annular groove, g4, that is adapted to receive and make agas-tight joint with the lower end of any one of the downcast flue parts of the ring-form iiue R. As' thus constructed and arranged the ring-form flue R has a series of radial points at which its downcast flue parts may connect with the upcast flue parts of the combustion-chamber, and so as to bring the exit E at such a point as may be most convenientv for connection with the chimney; but at whatever point the ring-form fine may connect with the combustion-chamber the contracted flue parts a', a, and a3 will be in that diametri'cal half of said ring-forin flue that furnishes the shortest and most direct passage of the heat to the exit-line, and which by their location and contracted area will compel a proper portion of the heat topass through the larger vertical flue parts which are in that part of the ring-form flue where the heat has the greatest distance to move tothe exit,and thus to make the action of the furnace uniform thereby.

The letter J indicates a dust-flue connecting by means of an opening, O, in the bottom of and with the feed-passage N at its upper end, and at its lower end with the clinker-cleaning area P.

The letter d3 indicates a dust-damper constructed at the bottom of said ue and arranged to automatically open or close said dust-flue by means of latch-connection made between said damper and the door of the clinker-cleaning passage. Vhen the clinkercleaning door is opened for the purpose of cleaning the clinker from the grate, the door in opening draws out the damper of the dustilue to open the latter, and so that there, is a draft-passage from the clinker-cleaning area directly to the fire-pot above the ire,and when the door K is closed then the damper da closes up the bottom of the dust-flue.

The letter L designates a flat link plate which at its inner end, at n', is pivotally connected to the damper-plate d3 and at its outer end pivoted to the latch-plate L2 at n", and the letter Z2 indicates a lip formed on the under side and outer end of the latch-plate. The door K of the clinker-cleaning passage or area is constructed on its inner face with a catch, cl, adapted to engage with the lip P of the latch-plate.

The dust-damper and its connection with the clinker-cleaning door are operated as follows: When the door is closed, then the latch and catch connect. When the door is opened,

IOO

the catch therein draws out thev damper until in its hinged movement at h, as turning, the door, after having drawn out the damper, disengages the latch. When the door is closed,

the catch on the'latter underruns the lip Fon the latch-plate, and by the contact of the latter with the inner face of the door Kthe damper is forced to close.

The letter W indicates a guide-plate which is arranged across the clinker-cleani'ng pas sage P, and this plateis provided'with a guideway, wi, for the transverse passage of the dan1perplate and link-plate.A

Having thus described my invention, what I claim, aud desire to secure by LettersPatent,

1. In a hot-air furnace, the couibination of a combustiouchamber provided with upcast vertical ue parts, a riugform horizontal flue formed `with downcast liue parts to connect withthe flue parts of the combustionchamber and having a transversely-cross eXit-ue opening at one end into the said ring-form ue and at the other end passing through said ringform Hue, and a flue part, a', projecting downward from the cross exit-Hue at its passage through the ring-forn1 flue to connect with an upcast iiue on the combustion'chamber, and provided with a diaphragmarrauged therein formed with an aperture, a, whereby the area of the flue a' is made smaller than the respective areas of those flues which are farther from the line of direct draft, substantially as described. I

2. The combinatiomin a hot-air furnace,of

fuel-supply passage at its upper end and at its lower end with the clinker-cleaning area of the y furnace, a damper arranged transversely in said dust-Hue, a link-plate connected to said' damper, a latch-plate made with alatch at its outer end and at its inner end connected to` said link-plate, and a latch-catch arranged On 35`V a dust-flue connecting with the bottom of the l

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