US1710674A - Heating stove - Google Patents

Description

April 23, 1929. c. w. BRABBEE HEATING STOVE Filed Jan. 2. 1926 2 Sheets-Sheet IN VEN TOR.

April 1929. 'c. w. BRABBEE HEATING STOVE Filed Jan. 1926 2 Sheets-Sheet 2 INVENTOR.

A TT EY.

Patented Apr. 23, 1929.

UNITED STATES PATENT OFFICE.

CHARLES W. BRABBEE, 0F BRONXVILLE, NEW YORK, AS SIGNOB TO AMERICAN ItADI- ATOR COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

HEATING STOVE.

Application filed January 2, 1926. Serial No. 78,762.

My invention relates broadly and generally to new and useful improvements in heating stovcs, and more particularly of that character or type wherein the heat generated by burning of a suitable fuel is imparted by nuiiation, convection, and conduction to the atmosphere of a room or other space in which the stove may be located.

The primary object of the invention is to provide a stove for house-heating purposes, which will be simple in construction, comparatively small in volume, and which may be operated at high heating efficiency with a comparatively small consumption of fuel.

A further object is to produce an efficient heating stove which not only will be operated by small quantities of fuel, but which requires replenishment of fuel only at long intervals, and thus be economical in operation and require a minimum of service.

A further object is to provide a stove of the character stated, which will operate effic'iently on substantially any grade of commercial, solid fuel, and espefially soft coal and wood, with a minimum amount of smoke.

A. further object is to provide a stove which will begin promptly to give off heat e'liicicntly within a. very short period after a lire is kindled. and which will in effect store the heat generated therein and continue to transmit the heat for a considerable )elod after the fire may have subsided or died out. 4

A further object to provide a stove which in its preferred embodiment will occupy but small space, but which will generate suiiicicnt heat to eflicicutly warm a com- 'iaratively large room or apartment. and which will radiate heat toward the lower portion of the room. and especially the floor.

Other objects will be apparent from the specifications hereinafter set forth.

The invei'ition consists in the improved construction, arrangement and combination of parts, to be more fully set forth hereina fter, and the novelty of which will-be particularly pointed out and distinctly claimed.

In the accompanying drawings, to be taken as a art of these specifications, I have fully and clearly illustrated a preferred em bodiment of my invention, and wherein- Figure 1 a view in front elevation of a preferred embodiment of my invention;

F ig. 2 is a vertical, central section on the line 2-2 of Fig. 1;

Fig. 3 is a top, planview of a base structure;

Fig. 4 is a top, plan view of an ash-pit section with the body portion of the stove removed;

Fig. 5 is a top, plan View of agrate-supporting member;

Fig. is a top, plan view of means for supporting or retaining a stove lining in place in the body portion and for supporting a balile Wall or curtain;

Fig. 7 is a detail, front view of a baflle wall or curtain;

Fig. 8 is a section on the line 8--8 of F Fig. 9 is a section similar to Fig. 2 but showing another embodiment or development of the same invention.

1 designates a base or stand upon which the other parts of the stove are assembled and supported. In the preferred embodiment lhis base includes a horizontal platform or table 2, substantially rectangular in plan view and supported at its corners by feet 3 which may be cast integral therewith, or be of any suitable detachable construction,

as may be desired. This platform is provided on its supporting surface with a pcripheral, upstanding head or flange 4. preferably cast with the body of the platform, and located inward from the outer ed es of the latter, so that the platform is provided with a marginal bearing face 5 surrounding said head.

Supported on the marginal face 5 is an ash-pit section 6, preferably of cast metal and including a front wall 7, side walls 8 and a rear wall 9, the lower edges of which rest on said face 5, so that the lower portion of the ash-pit section is closed by the platform 2 which constitutes the bottom wall of the ash-pit section. The front wall is provided with an opening 10 through which access may be had for removal of ashes from the ash-pit, said opening having a hinged closure plate or door 11 of well known form pz-xorided with draftopening 12 and slidahle closure plate 13 controlling the same. In Fig. 1 the plate 13 is shown in position to uncover opening 12 to admit air to the ash- ;ili. The walls oi" the ash-pit section are preferably inclined or tapered inward to i ill/3t) in place by cenlact of its side laces with the adja rentfacee of said head 15. This plate 18 termed with a central, circular opening 19, and extending downward and inward from said plate er auppeitin; legs 20. Arranged within the circular tugening 19 and snipported upon said lugs 20 it; a re ary grate 21, cirrailar in contour, and having inwardly directed, spaced lingers 22 terminating); some dieance ehort ot' the center of the plate to provide a central space Certain of the fingers which are opposite to each other are nrorided with depending; and inwardly directed. lugs 24;, upon which is elidably arranged a reciprocating, perforated grate section and prof riding through an opening in the side wall 8 of the stove is a shaker arm 26, .see Fig 1 and 8. By applying a suitable SlltlIOlFlJil to the arm 26, the latter may b swung from side to side to oscillate the entire grate structure, inclusive of the plate 21 and part or the part 25 may be reciprocated The re "orward and barliwz .rd. eiprocations of the part. 25 are guided by means: of extension fingers 2" coiuperatinp; with said lugs ill, and aleoby engagement of a depending linger 28 on plate 31 with a slotted fork 29 strzuldling the arm 26. The arrangement just described. also n-ovidee such connection between part. 25 and the plate 21 that the latter may be rotated as described.

Arranged above the ash-pit section is a firc-pot or body portion ehown generally at- 30, the same being; substantially rectangular in cross-section on any horizontal line, and comprising a front wall rear wall and side ails 33, preferably east in an integral metal structure. The bottom of the shell of the fire-pot open and the lower edges of the walls rest on the outer, supportting surface 17 heretofore described. l ron'i the lower edge of the shell the w; lie of the nan-pit section and fire-pot member are flared upward to the top of the fire-pot, as will be ail parent from Figs. 1 and 2 of the drawings, i. e., l1as equally inclined Walls controlled hy a slidahle closure-piete 2. The opening may be opened to admit air to the reg-jot in a inannir and to, a purpose to he presently eet torth. The lower portion '7 )6 lniorided with oneniu m of the door .nr 7 l ill) eloeed by r nu, which is protected from heat: ai. d l'la'ne l huntescreen ll, sup ported in rear tl ly the door 37, aul

l nor are inlet open r unlary air helweei icon, that the air may i into the tire chamber ll he iwted that the lire p 'i' ,untially symmetrical in, crow-:- seetiou, and that the cente" o'l. the grate is located on the vex-lice i It will also be noted that the grate area is small compared to the (.!l.\)FS-5lLCl'l ilill area oi" the sec' ion 30.

The walls of the tire-pot sectioi are lined rith a suitable refractory, 1n'e'terably conipl'llilhg' lower and upper lire-l riclc bloelrs -13, .114;, which rent aga n 1 said walls, said lining extending p: H om the eizln'eine bottom of the lire-pot a aceut the .erale, point adjacent the top of the in." --pot en above the upper edge of the :tuel openin 3 The lower lire-ln'icle: or lJ HC LS res or and. are rupport at their lower portions upon n upper run-lace of the bead o and againet a rhani'l'i l tar-e 18 on the p a e it, the lower portimr; of said blot-it being each provided with a horizontal :laee and a ehainlered tare all).

It willv be noted, particularly upon reference to Fig. 8, that inch set oi lite-brick blorl' 413, 44-, respectively, includes four slabs, ea :h of which rests an: iuet an adjacent wall of the fire-pot nieuiher ill). The

in the lowe edge Ines 4'2 delirca he door and ti e side and back block; are provided with chanilered Fade tacos; 1 and the l'ronl. and

rear oloche are proruicd with a'i'". .:'ular portions 16, also provided with chaml'ered end laces whicl engage the adjacent :tacec =15 on the side blocks. By this arriuieenient when the blocks or slabs are pliueo in posi tion, they cooperate to hold each other againet the side walls of the tirepet menil;)erthat in, to prevent inward displacement from opera tire position. As will be apparent from Fig. ot' the drawing the upper edge portions; of the lower blo 453 are priwided with faces at? which are in a plane su .iiantially at right ill gles to the front and rear faces of the blocks, so that when the bloc cs are located in position said faces 47 are inclined to the horizontal, and the lower faces of the upper blocks 44 are formed to correspond to the faces 47 and rest thereon, so that the upper blocks interlock with the lower blocks and inward displacement of the upper blocks is prevented at this point.

At the upper portion of the fire-pot the upper, refractory blocks at the sides and rear walls are held in place by a retaining memher in the form of a rectangular frame, inclmling a horizontal portion 48 adapted to t on the upper edges of the blocks, and internal flange 49 extending downward nto engagement with the upper portions of the inner faces of the firebricl s. This retaining member rests by its own weight on the tire-bricks, and due to its rigidity mainta' the latter in position without the necc ty of additional securing means.

The upper edge of the front block 43 terminates just below the lower edge of the fuel inlet and is held in place b wllh retaining plate 50, which is secured by a bolt 51 to the lower wall of element 36. Should re placement of the blocks be necessary, the member -ilS may be readily raised from position to permit removal of the side and blocks, and after insertion of new blocks, may be with facility replaced in its holding position in engagement therewith. The front block may be replaced by detaching the plate 50.

That portion of the flange 49 which depends from the front, transverse member of the retaining frame, is provided with an in wardly directed flange or lip 48 forming an upwardly opening groove 48* which serves a purpose to be presently set forth.

llxtending from a point at the front wall above the tire door, and extending downward and rearward toward the rear wall and fuel bed, is a baillc or curtain wall 52, preferably of cast-iron, said bal'llc being i-m-vcil as shown, and having its lower end lorated nearer the rear wall than the front wall and preferably at a point approximairly at the level of the lower wall of the fuel inlet, as at 55 The said lower, rear edge is preferably located midway between the vertical center of the fire-pot and the inner surface of the rear wall. Itwill be seen that the ballle divides the fire-pot transversely into a large, primary combustion chamber 54:, and a rear, restricted outlet throat- 55, the latter being formed by the ballie and the rear wall of the fire-pot. It will also be seen that the front and side walls of the primary combustion chamber are lined by the refractory, and that the outlet throat is lined with refractory on its side and rear walls. By the arranmunent just descrdml, when the fucllevel is approximately at the line A A, and the fire is burning, and when air is admitted 'over the fuel in front of the bafllefor example, through the fuel inlet or the opening through the fire door-the air is deflected by the battle on to the bed of fuel andis drawn with the products of combustion and unignited gases beneath the lower edge of the baffle into the restricted throat In the throat the unignited gases, etc, are projected against the hot refractory, and are there ignited, so that more perfect combustion of the fuel is assured, and production of smoke materially reduced.

In itsprefcrred embodiment, the battle is braced and strengthened by integral, transverse and longitudinal intersecting ribs 56, 57, the latter being of increasing depth from top to bottom of the plate and terminating at their lower portions in teeth or projections 58 which extend below the lower edge of the plate. Between the ribs 57 are a plurality of vertical ribs 57, the upper ends of which terminate below the lower, transverse rib, said ribs 57 being similar in construction to ribs 57 and terminating in like manner at their lower ends in teeth 58. By means of the increased depth of the longitudinal ribs 57, 57* and the projections 58, 58, the fuel is prevented from being packed against the lower portion of the battle, and

held away therefrom so as to provide unobstructed vertical spaces or passages between the ribs for free flow of air and gases from the combustion chamber between the fuel and the bafile and beneath the latter into the throat 55.

The battle or curtain is preferably supported at its forward and upper edge by means ofa flange or rib 59 seated in the groove seat 48*, heretofore described, and if desired the supporting connection may be made rigid by means of overlying clip-plates 60 secured by screws to the transverse front frame member and the adjacent portion of the battle. By the means described, a simple and effective means is provided for detachably securing the bathe in place and permitting easy assembly thereof.

Arranged above the fire-pot member is a head or dome 61, which is substantially rectangular in cross-section, having a front wall 62, rear wall 63, side walls fi l, and a top crown wall 65, the *alls ofthc dome forming continuations of the sidewalls of the fire-pot member, and the interior of the dome forming, together with the spacein rearof and above the baliie, a secondary combustion chamber into which the products of combustion are delivered from the restricted throat 55 heretofore described. The lower edge of the dome is formed with a surrounding bearing face 66 adapted to rest. upon the horizontal, upper edge of the tirepot, and withan external, depending flange 67 having an outwardly flared bearing face 68adapt'ed toseat upon an inclined or chamferiedi face 69011 the top of the fire-pot, so that: the dome, by its weight, rests solidly upon the upper edge of the fire-pot, and a smolmand gas-tight joint is afforded. The rear wall of the dome is provided with a smoke outlet duct 70, preferably cast integral therewith, and by which commotion is made to a suitable smoke pipe (not shown) leading to a chimney, said duct being located below the crown or top wall.

The dome is preferably made in an integral structure of cast-iron, andiis not lined,

so that it is quickly heated and etliciently radiates its heat to the surrounding atmosphere.

The construction and arrangement of the parts being as above described, the operation of the stove is as follow: The lire is kindled '1 any suitable manner, and the fire-pot is supplied with any suitable solid fuel, such as coal, coke or wood, to alevel substa'm ly in line with the lower portion of the fuel inlet, the level of the fuel close y agmroaching the lower, rear edge of the baflle 52. lVhen the fire is first kindled; the refractory lining will not at once be heated,.but the hot products of combustion passing throi'igh the throat e11tor the head or dome G1 and the walls of the latter are quickly heated so that the stove will begin to tl'Zl-llSHllll its heat very shortly after the firo has been started. As soon as the fire is burning normally the refractory becomes heated, and then efficient transmission will take place from the the pot walls. During this period the fuel, if coal, becomes coked. \Vhen retiring the coke is pushed back and under the baflle closing the space between the lower portion of the ballle and the rear refractory wall 44, whereupon fuel supplied to a desired level, for example AA, so as to rest against the front of the batile. The air entering through openings 38 in the fire-door passes over and through the fuel and down between the ribs 57, 57, and between the teeth 58, 58 into the restricted throat. It will alsovbefound. that should the fire go out, the stove will continue to radiate heat for a considerable period, due to the heated. refractory continuing to give off heat stored therein during the burning of the fuel. In cases where soft or smoking coal is used, the opening through the fire-door may be opened for a suitable distance to admit air over the fuel bed in front of the battle, which air. being deflected by the battle uponthe fuel bed and drawn through the latter, will mix with the prodnets of combustion and unburned gases and pass with the same into the restricted throat where the unburned gases will be ignited by contact with the hot refractory lining forming the back and side walls of the throat, and thus reduce smoke to a minimum. The prod,-

nets of combustion pass from the throat into the dome andthere give off heat to the walls of the dome. The products in passing from the throat into the dome are directed toward'the front of the latter so as to circulate in contact with the wall of the dome before passing out of the outlet duct. If desired, additional secondary air may be supplied to the throat 55, through an inlet port 55, through the side wall of the stove, which port may be screened by a mesh and covered by a movable cow-opiate r. The plate 55 may be opened diuing the periods of kindling and retiring:

In the modified form shown in Fig. 9, the air in addition to being admitted to the firepot through the fire-door, is admitted through a tube 71 haring an inlet end. '72 opening through the front wall of the dome, said tube extending through the dome to a point substantially central thereof, where it directed downward and through an opening-73 in the ballle so as to discharge the air onto the fuel bed in front of the batllo. '51, arranging lflivair tube to extend through the dome, said tube is heated, and consequently the air flowing tlieretliriuigh heated before being discharged. into the tire-pot in. frontof 'the batlle. The upper end of the air inlet tube may be bolted, as at 74, to the front wall of the dome, whereby said tube secured rigidly in place. In order to assist in supporting the battle, the tube preferably provided with a lug 75beneath the baiile and upon which the latter rests.

lVhat I claim and desire to secure in: Letters Patent of the United States is i 1. A heating stove comln'ising an ash-pit, a fire-pot above the ash-pit and having a fuel inlet in its side wall, said fire-pot ha ving substantially equally inclined walls diverging gradually upward such that said lire-pot is of gradually increasing horixom tal cro sectional area, a grate between the ash-pit and lire-pot, and a deflecting ballle supported at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lower portion of the fuel inlet and at the normal fuel level to divide the lire-pot uuoduallv above the fuel bed into a forward main combustion chamber and a relativrlv re stricted outlet throat at the back of the lirepot for passage of emnbustiou products from said main chan'iber.

2. A heatin tore comprising an ash-pit, a lire-pot above the ash-pit and having a fuel inlet in side wall, said fire-pot having substantially equally inclined walls diverging gradually upward such that said fire-pot is of gradually increasing horizontall cross-sectional area, a grate between (he ash-pit and lire-pot, a deflecting baflle supported at its upper portion above the fur-l inlet and extending downward and rearward ill) to a pointapproximating the lower portion of the fuel inlet and at the normal fuel level to divide the firepot unequally above the fuel bed into a forward main combustion chamber and a relatively restricted outlet threat at the back of the fire-pot for pasof combustion product; from Said main uber, and a refractory lining for said rectcd throat adapted to be heated to gas itiou temperature by lire in uaid lirc-p t so that Ul'lblllllflll gases are ignited in rear of said batlle by the heatof said refractory lining.

3. A heating stove conn rising an ash-pit, a lire-pot above the ash-pit and having a fuel-inlet in it. i wall, said lire-pot having: substantially equally inclined walls diverging: gradually upward such that said limpet in of gradually increasing heriaoir lal c: sectional area, a grate between the uuh-pit and lirc'pot, a deflecting braille suppo t d at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lower portion of the fuel inlet and at the normal. fuel level to divide the lire-pot unequally above the fuel bed into a forward main coinlJllt-Sll'iUll chamber and arolatively restricted. outlet l lll' lllll] at the back of the fire-pot for paeragrc of combustion products from said main chamber, and a refractory lining for the lire-pot and extending above the lower edge of said balile and expoeed to ea 1 paming; through said throat so that unburned gas is iu ni'ted in said throat by the heatof said refractory lining.

at. A heating stove CODllHlSlllgI an aelrpit, a lire-pot above the ash-pit and having; a fuel inlet in its side wall, eaid tire-pot ha 5- ing :-;lll)l lfl'i1l1lllll. equally inclined walls digrradually upward such that Silltl is of. gradually incl-e filing); horizon- ;cctional area, a grate between the aehrpit and lire-pot, a deflecting bafllc supported at it: upper portion above the fuel det and extending downward and rearwa rd t a point appriaxiinaliing the lo'\'-:'er portion of the L l inlet and at the normal fuel level to di, we the lire-pot unequally above the fuel bed into a forward main combustion chamber and a relatively restricted outlet threat at the back of the lire-pot for para, e of (U Hlillf-litill products from uaid main chaiuli and means for admit-tin; air above the fuel level and in front of said baffle.

5 BL lllfll'lllfjStUVU comprising an ash-pit a lirepot above the aelrpit eaid lire-pot havin eubstantially equally inclined walls di r inn gradually upward such that said fircpol1- ii; of gradually imreasing horizontal en aectional are; a grate between the ash-pit and firepot, said lire-pot having: fr nt and rear walls, the front wall having; a fuel inlet, and a depending: deflecting batlle extending from the front wall above the fuel inlet downward and rearward toward said rear wall, said baffle having its lower edge portion located at approximately the lower portion. of the fuel inlet and at the normal fuel level and nearer to the rear wall than the front wall so as to divide the firc'pot above the normal fuel level into a forward main fuel chamber and a relatively restricted outlet throat at the back of the tire-pot for combustion products from said main chainleer.

6. A heating stove comprising an ash pit, a lire-pot above the ash-pit, said fire-pot having substantially equally inclined Valli; diverging gradually upward such that said fire-pot of grai'lually increasing horizon tal cross-sectional area, a grate between the ash-pit and fire-pot, said lire-pot having; front and rear walls, the front wall inning a fuel inlet, a depending deflecting hatlle extcnmfling from the front wall above the fuel inlet downward. and rearward tmvard said rear wall, said battle having its lower edge portion located zit approximately the lower portion of the fuel inlet and at the normal. fuel level and nearer to the rear wall than the front wall so as to divide the fire-pot above the normal fuel level into a forward main fuel chamber and a relatively restrict-ed outlet throat atthe back of the firepot for combustion products from said main chamber, and a dome of heat-conducting material above the lire-pot and receiving the hot gases from said restricted throat outlet.

7. A heating stove comprising an ash-pit, a fire-pot above the ash-pit, said fire-pot having substantially equally inclined wallu diverging gradually upward such that said fire-pot is of gradually increasing horizontal cross-sectional area, a grate between the ashpit and the fire pot and substantially eoncentric with the fire-pot, said fire-pot having front and rear walls, a fuel inlet through the upper portion of said front wall, a refractory liningfor the fire-pot and extendinn from below the fuel level to the upper portion of the lire-pot, and a ballle supported adjacent the front wall above the fuel inlet and extending downward and rearward toward said rear wall so that its lower rear edge portion is adjacent the fuel level and nearer the rear all than the front wall. thereby dividing the cross-sectional area of the fire-pot into a forward main fuel chamber and a rca r relatively restricted outlet for passage of combustion products from said main chamber.

8. A heating stove comprising an ash-pit, a fire-pot above the ash-pit, said fire-pot having subetantially equally inclined walls diverging gradually upward such that said fhepot of gradually increasing horizontal cros -sectional area, a grate between theashpit and the fire-pot and substantially eoncentric with the fire-pot, said fire-pot having front and rear walls, a fuel inlet throughthe upper portion of said. front wall, a refractory lining for the fire-pot and extending from below the fuel level to the upper portion of the iire-p0t, and a baille supported adjacent the front wall above the fuel inlet and extending downward and rearvard toward said rear wall 50 that its lower rear edge portion is adjacent the fuel level and nearer the rear wall than the front wall, thereby dividing; the crossecctional area of the firepot into a forward main fuel Glidinher and a rear relatively restricted outlet for passage of combustion products from said main chamber,-the refractory liningof the fire-pot rear wall constituting the irear wall of said outlet so that unconsumed gases are igni ted in rearof the baille by the heat of said restricted throat lining.

9. A heating storecomprising an aash-pit, a firepotaliove the aelkpit, saidfire-pot'having :nibetantially equally inclined walls diverging gradually upward such that said lire-pot is ofgradually increasing horizontal CI.'O$S-ECil0I1il area, ft glzlt'fii between the ashpit and "he tire-pot and substantially concentric with the tire-pot, said fire-pot having front and rear vmills a fuel inlet through the upper portion of said front wall, a re- :l 'actory lining fortheitire-pot andextending from below he fuel. level. tothenpper portionofvthe fire-pot, a baflle supported adjaccnt the front wall. above the fuel inlet-and extending downward and reammrd toward said. rear wall so that its lower rear edge portion is adjaccntithe 'fuel level and nearer the rear wall than the front wall, thereby div ding the cross-sectional area of the firepot into a forward main fuel chainhe' and a rear relatively restricted outlet for paeergo (1f CUllllJllSttUll products from said niain chamber, the relraci'iry lining of the firepot rear wall con mtiire the rear rail of finli'l throat outlet no that unconaunied Q'Z'ISQH are ignit d in rear of-theba'llle by thehcut of maid reetrictml throat lining, nun dome above the tiiepot concentric therewith and conntiti'ding :i combustion chamber.

ill. A limiting; stove comprising an anhpit, a lire-pm; above the aslnpit naid iire-pot lnzrin g' snlrdantiallyequally inclined ralls diverging 'adually upward SllClltllHh said tire-pe t is of gradually increasing horizontal cro;-=

sectional area, a grate between the a. h pit and the lire-pot and substantially c,on centric with the fire-pot, said fire-pot havingfront and rear walls, a fuel inlet througlrthe upper portion of said front wall,:a refractory lining for :the fire-potand extending from belowthe fuelilevel to the upper portion ofthe fire-pot a baille eupported adjacent the front wallabove the fuel. inlet and extending downward and rearward toward said rear Wtlll so that its lower rezr dge portion is adjacentthe :fuel level and nearer the rear wall than the front wall thereby ig the croae sc :tional area of the lirepc-t into a for vard main fuel chamber and a relatively restricted outlet for passage of CUIIIlHlStlOll products from said main chanil er the refractory lining of the fire-pot rear "wall constituting the rear wall of said outlet so the t unconeuined gases: are ignited in rear of the lrallle by the heat ol. eaid reetricte l throat liniiur and a dome almrc the tire-pot concentric therci'vith and renal i tutino a combustion chaii-ibc-r, said dome her of unlined metallic material subject to the direct cilcct of the heat of the gases thcwin andv constituting a heat-emitting elei'nent.

11. A heati love coniprieing an aslrpit, a fire-pot above the aeh pit, a grate between the ash-pit and the fire-pot, a fuel inlet to the tirepot, lower refractory lining bloclc-s within the lire-pot and supported therein, upper refractory lii'iingr blocks, pported on said lower blocks, d e plane of the meeting; faces of a lower block and it: upper supported block bein inclined downward from a horn-rental plane toward the outside ofthe fircpet whereby the upper bloc]: is: held at lower end an ainetmovement inwardly in and a retaining :l'raine roe upon the upper ends of the upper hlecl-uis and ma 'liizlillll'll the upper emh; of aa l upper )l anainnt movement in- 12. A h ating stove comprising an ashpit, a lire-pet above the aah-pih a grate between the asnpit and the lire-pot, fuel inlet to e firepo lower refractory lining within the firepot and supported an inclined seat adjacent the gratin ends of nd blocks having; face: "h raid mat to retain said is; against inward movement, upper rey lining: blocks supported on raid lower hloclqe, the plane of the meeting: farce of a lower hloclq and its upper supported b l': uring" inclined downward from a hor- A plane town-d. the oulai L of the tire pot whereby the upper hlocl; is held at ih: lower end against inorcineut inwardly in a horizontal plane and a retaining frame l'tiit upon the upper cnds ol. the upper hlucle;

maintain the upper enda of mid per bloclo against increment inwardly in a l l. 1'l il)i1i2ll plane.

38. A heat n rrc comprising an ash-pit, a lire-pet above the aahpit a nn-rte between the lirep-ot and the aslrpit, a fuel. inlet to the fire-pot, re A 5 lininghloclm within the fire-pot anl extending to a point approizinnitin z the upper portion of the fuel inlet, a reta'nin frame at the upper portion of said blocks for maintaining the same in position and inclui'lin' '1 member carried by di i d iii) a horizontal planw hloclc said frame and lecatrd adjacent the upper portion of the fuel inlet and a downwardly lllll lit! and rearwardly directed baflle having its upper portion supported by said member, and said battle depending within the tire-pot to divide the same into a main combustion chamber and an outlet passage in rear of the batlle.

1a. A heating stove comprising an ash-pit, a lire-pot above the ash-pit, a grate between the ash-pit and the tire-pot, a fuel inlet to the fire-pot, a refractory lining for the tirepot, a retaining frame engaging the lining at a point approximating the upper portion of the fuel inlet, said frame having a channel member adjacent the fuel inlet, a deflect ing ballle extending downward and rearward from above the fuel inlet, said bafile having means engaging the channel of said channel mcmher whereby said batlle is supported, and said battle dividing the fire-pot above the normal fue level into a forward main combustion chamber, and an outlet passage at the rear of the lire-potfor passage of combustion products from said main chamber.

15. A heating stove comprising an ash-pit, a tire-pot above the aslrpit and having a fuel inlet in its side wall, a grate between the ash-pit and fire-pot, a deflecting bafile supported its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lower portion of the fuel inlet and at the normal fuel level to divide the tire-pot above the fuel bed into a forward main combustion chamber, a restricted outlet throat at the back of the re-pot for passage of combustion products from said main chamber, and an air inlet tube extending downward through said battle into said main combustion chamber.

16. A heating stove comprising an ash-pit, a lire-pot above the ash-pit and having a fuel inlet in its side "all, a grate between the ashpit and tire-pot, a deflecting batile supported at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lower portion of the fuel inlet and at the normal fuel level to divide the fire-pot above the fuel bed into a :lorward main combustion chamber, a restrictoil outlet throat at the back of the tire pot for pas--rago of combustion products from said main chamber. a dome above the tirepot and receiving the hot gases from said restricted throat outlet, and an air inlet tube lo rated in said dome to be heated by the gases therein, said tube having an inlet; end opening through the wall of the dome and its outlet end arranged to discharge air beneath said baffle.

17. A heating stove comprising an ashpit. a fire-pot above the ash-pit and having a fuel inlet in its side wall, a grate between the ash-pit and fire'pot, a deflecting battle supported at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lower portion of the fuel inlet and at the normal fuel level to divide the fire-pot above the fuel bed into a forward main combustion chamber, a restricted outlet threat at the back of the tire-pot for passage of combus tion products from saidmain chamber, a dome above the tire-pot and receiving the hot g: from said restricted throat outlet, and an air inlet tube located in said dome to be heated by the gases therein, said tube having an inlet end opening through the wall of the dome, and its outlet end projecting through said baflle into the main combustion chamber to discharge air in front of said bafile.

18. A heating stove comprising an ash-pit member having side walls and a horizontal platform having an intermediate perimetral bead dividing said platform into outer and inner bearing faces, a grate member supported on said inner bearing surface, a firepot resting on said outer bearing surface, said grate member having a part projecting above said bead and forming with the firepot a groove, a refractory lining for the firepot and having its lower portion seated in said groove and therebyheld against inward movement relative to the fire-pot wall, said refractory lining extending to the upper portion of the fire-pot above the fuel level,

and means engaging the upper portion of the refractory lining for securing the same in position relative to the fire-pot wall.

19. A heating stove comprising an ash'pit, a fire pot above the ash-pit, said fire-pot having substantially equally inclined walls diverging gradually upward such that said lire-pot is of gradually increasing hrn'izontal cross-sectional area, a grate between the firepot and the ash-pit, a dome above the firepot and constituting a heat-emitting element. said tire-pot and dome being of substantially rectangular cross-section, a fuel inlet through the upper portion of the tirepot wall, a battle supported at its upper part above the fuel inlet and extending therefrom (lownward and rearward with its lower edge portion arranged between the vertical axis of the fire-pot and the rear wall thereof, and having lower end located at approximately the lower portion of the fuel inlet and at the normal fuel level, whereby the tire-pot beneath the baffle unobstructed for the reception of fuel, and that portion of the fire-pot above the fuel level is divided into a forward main combustion chamber, and a rear restricted throat through which products pass from said main combustion chamber and also from the fuel in rear of the throat into said throat and to said dome.

20. A heating stove conmrising an ashpit, a fire-pot above the ash'pit, a grate between the fiiepot and the ash-pit, a dome above the fire-pot and constituting a heatemitting elc1nent,-said fire-pot and dome being of substantially rectangular crosssection, a fuel inlet through the upper portion olithexfirei iot wall, abaflle supported at its upper part above the fuel inlet and extending therefrom downward and rearward with its lower edge portion arranged between the vertical axis of the fire-pot and the rear wall thereof, and having its lower end located at ap n-oximately the lower portion of the fuel inlet and at the normal fuel level, whereby the fire-pot beneath the ballle is unobstructed for the reception of fuel, and that portion of the fire-pot above the fuel level is divided into a forward main combustion chamber, a rear restricted throat through which products pass from said main combustion chamber and also from the fuel in rear of the throat into said throat and to said dome, and a fractory lining for the lire-pm supported on said asshpit and extending upwardly substantially to the horizontal plane of the top of said baf- 21. A heating stove comprising an ashpit, a firepot above the ash-pit and having a fuel inlet in its side wall, a grate between the ash-pit and fi1'e-pot, a deflecting baffle supported at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lowor portion of the fuel inlet and at the normal fuel level to divide the lire-pot above the fuel bed into a forward main combustion chamber, and a restricted outlet threat at the back of the fire-pot for passage of comlnistion products from said main chamher, said baffle having substantially vertical lbs on its forward face forming flow pas sages and having projections along its lower edge to hold the fuelout of contact with the face of the baflle, said ribs and projectirms providing for free flow of air and gases from the combustion chamber between the fuel and said baflle and beneath said baffle to said throat.

22. A heating stove comprising an ash pit, a fire-pot above the ash-pit and having a fuel inlet in its side wall, a grate between the ash-pit and lire-pot, a deflecting battle supported at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lowor portion of the fuel inlet and at the normal fuel level to divide the lire-pot above the fuel bed into a forward main combustion chamber, and a restricted outlet throatat the back of the fire-pot for passage of combustion products from said main chamber, said ballle having substantially vertical ribs on its forward face extending clownward and forming flow passages terminating in teeth or projections extending below the lower edge of the battle, said ribs and teeth serving to hold the fuel out of con tact with the face of the baffle and providing for free flow of air and gases from the combustion chamber between the fuel and said baffle and beneath said ballle to said throat.

23. A heating stove comprising an ashpit, a fire-pot above the ash-pitand having a fuel inlet in its side wall, a grate between the ash-pit and lire-pot, a deflecting ballle supported at its upper portion above the fuel inlet and extending downward and rearward to a point approximating the lower portion of the fuel. inlet and at the normal fuel level to divide the lire-pot above the fuel bed into a forward main. (ombustion chamber, and a restricted outlet throat at the back of the fire-pot for pas-age of combustion products from said main chamber, said battle having spaced projections or teeth along its lower edge to hold the fuel out of contact with the face of the battle to provide flow passages for llow of air and gas from the combustion chamber to said throat.

24. A heating stove comprising an ash-pit, a lire-pot above the ash-pit and having a fuel inlet in its side wall, a grate between the ash-pit and fire-pot, a deflecting ballle supported at its upper portion above the fuel. inlet and extending downward and rearward to a point approxin'iating the lower portion of the fuel inlet and at the normal fuel level to divide the fire-pot above the fuel bed into a forward main combustion chamber and a restricted outlet throat at the back of the lirepot for the passage of combustion produots from said main chamber, means o, ning through said ballle for adinitt. re air above the fuel level in front of said battle, and means for admitting air to aid restricted outlet throat and above the fuel level.

A heating stove comprising an ushpit, a lire-pot above the ash-pit, a grate between the ashpit and the lire-pot, a fuel inlet to the fire-pot, lower refractory lining blocks within the fircpot and supported therein, upper refractory lining blocks supported on said lower blocks, the plane of the mort e faces of a lower block and its upper unpported block being inclined downward from a llOlljfl'lDi'lll plane toward the outside of the lire-pot wherelrv the upper block is held its lower end against movement inwardly in a horizontal plane.

26. A heating stove comprising an ashpit member having side walls and a horizontal platform having an intermediate perimetral bead dividing said platform into outer and inner bearing faces, a grate member supported on said inner bearing surface, a lirepot resting on said outer-bearing surface. said grate member having a part n'ojecting above said head and forming with the fire pot a groovem refractory lining for-the lirelilo " 'tion of the fire-pot above the fuel level,

means engaging the upper portion of the refractory hmng for seem-111g the same in position relative to the fire-pot wall, and a baflle sup orted by said means and depending there rom to divide said fire-pot min a 10 main combustion chamber and an outlet throat.

In testimony whereof I t have hereunto subscribed my name.

CHARLES W. BRABBEE.

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