ciaim as my iiiventio n is: 1. -z-V stove con-il:)risir.,,g a verticil cylin(Iric,,tl shell, t nrobox at tl-ie lower encl of 95 sa d shell, an inverte dome ove t c firebox ,tnd of less cliimeter thftil gaid s I to provide an gas flue, said do e having an ,iir stil)pl.)T flue extendiiig horizon'u,,illy I-lo Aiitho-Li.t t-lie shell, a stem extendiii(y ceii100 t , trally 1,ip@i,,Ird from said doine and a perfo-atcd ,tir distribliter plate C,,irried by the 56 which ni,,ty b(I secu@,ed 'uo tl)el LtIT.- inlet iil)l)er en(I o-'c slid sl@em and of sniallei- dity.1flue 5, as by sereAv-iii(- inlo -,t tl-ireaded opeii- 'e't,er tllai-i t-he dome to leaile tii tlnnul@i,.Ll III, iiig tliere.ii-i, a clisk 51-) egi-i@ied bl, a -,i,ssqge abolit i.t. 105 p 45 ceii[ra'L s,tem 53, q"boutt which is Et suppor@iiig 2. A heatiiig stoi,e haviag aii enclosed aii@ spriiig 55 ,tneL on N@,hich is aii -td-justi-@io- n-Lit heatii,.g ali,'-nilel. -Lil a@ir filter, ,tnd an a@Lr plssage coniiecting the filter -",ith the eiiclosecl air he,,Lting cliaiinel, and liftving ,i stiction operable valve in' its Niall betiveen 110 5o The fobbric of the screetiino- or filter- the air filter ,Lnd the air eno-losed heatilicr ii-ic, cones are m,,idc, may be e,,isiiy reinoved, el-iannel. cleaiiecl ind replaced. Being of ,t simple 3. A stove having a cist base section foriiiino, of coiistrvctiori- thU m,,ty be m,,tde, by t s etion fo,,,iiiiiig a ' 54. TT ti-ie filterii-ig f,@bi,ic gets el dtist so th,,tt ttio a@.ir slipply is re v,q,lve 52 -vvill be drinvii c-[onvn 'Llo type a fire pot, a cas e Ttlel chaii-iaiiyone iihen it becomes necess,,ii-@y to re- ber dome, a, wrought mettl sl-iell connect115 55 place thern. All the air which is i)assed ing s,,iid two cast sections@ 'Lnd supportliag tllrc)UL"h the heatin- chftmbe,,s of the stove sLruLts coiinectiii(I said two c,,tst sections oi-itbeiiilc,, passed thro-Ligh this filter, is freed sicle of said shell. of dust. Signed it Seattle, Kiiig Cotinty, WashTo difftise the enterii-ig air iii the heatin(y in(rton, this Tth day of October, 1921. (;o drurn 4-, 1 have provided q. deflector plate or diffuser, as 8. This is of soniewl-iat less AUGUST HOTIMQUIST.

Uhi'ITED STATES PATENT OFFICE. AUGTJST HOLIV@'QUIST, O:q YIOINTROE, WASHI-i\TGTON. STOVE. SpecifLeation of Letters Pateiit. Application ftlecl October 13, 1921. Serial No. 507,455. To (ill johom it ii?ay co@@cer,17: Be it kiiown that 1, ATTc.-uST IIOL-11,QUT@@T, a citizeii, oi" the U-7iiteci St@ites of Aiiieri(@,,L, al'10, reside@it oL' the) cit,@ of Moiii,oe, ii-i the co-Lint@, of S1,101-ioluisIi @iid State of W@isl-iiiio,ton, have invented cei-t@ain neiv aiic.1 useflil Improvements in Stoves, of -@vhich the follo)i,ing i,s tu specification. I @v,ry i.nveiition rel,,ites to stoves ancl pai- 0 tictilqrly to stoves which tire desl-o,i)ed @"oi,it' - purposes -esiclences he, ino such as iii i t, stores and the like. The object of m@7 ii-iA,entioi-i is to provide a stove for stich uses Aihi-ch ivill be economic,,tl 15 in cost of inanuf,,)ctLire aiid efficient in its lie'Atillo'. that isi e,xtract from the ftiel ,t large per-.entage of the heal erierated i,n its comb7Listion. Another object of my invei-ition is to pro20 vitle with stiel-i ,t stove i-yi,,@ans wliereby tir .niay be passecl 'throi-igh chimbers or pasSllt(,es ivhich ,ire stirrounded I)y the gases of combustion so as to extract froiii s-,iid g,,tses ,t large percentage of heat containecl thei-ein 2 5 aid also to provide means NAhereby the air employed for such plirpos-,s muy be thoroughl@Tfiltered by the use of tpparattTs Nihich is clie first cost, e,,tsil3, replacecl aiid opei-ates ef-neieiitly as L f-ilter. 30 The featlires of my iiavention -will be liere@nafter described aiid t@lie novel parts tll)on whicli I clesil,e to secure ,i I)z-,teiit -Niill be 1)articiilarl3, defin-d I)y 'u-he clairiis terminatin, this specifie,,ttion. 35 The aeconip,,inying di.,,twings Illtistrate i-fiv i.iiveiiti.on i-i-i the T-orp-i of collsLrLiction I IIOAV prc,,fei@ to use. Figure I is :), vertical sect-i.on ta,ken iipoi-i tl-i(,, centpt]. ])Itne oT' 'cl-ie stove. L'i 40 2 is@ t see'- on takeii. on i liorlzoiital represeiited bv the brokeli line 2-9- of Filp:tii-e 1. Figtire 3 is t section takei-i upon the horlzoiit,.i.1 pl,,tne represented by the bro,@en line 45 3-3 of F@.(Ytire 1. The inai-ii body of the stove as illiistrated il-I the di-awin-S consists of a.vertical cylin(I.er. This is mounted Lipoii a b,,ts6 1 supporte.d upon legs 13, I)ut this may in the miin be 5o v,,iried as desii-ed. The b,,tse lias ai-i ash pan 10 aiid door 11- @vlii.el). cloor may be provided -v@ith draft openings aiid iiieans for closing the same -,tf-ter ti-iy form of constp-Lictio?l foulid sui.table and desired. 55 If the s@uove be desi-ned for @vood. biii-ninoit iioLild i-iot ordiiiari.ly be proi,-id,-,d ,ii'L-h i, e(,Il@,Lto I)tit i,f (lesigiiecl for bui-nincy coal, or if thi@ I)e desired -J'or aiiy othei- reasoii, it iliiy be proi,i-ded iiitli a gr,,,,te, as 12. The pa,@,tictil@tr coi-istructioii of the, I (yrate is im- 60 itiatei,],,tl. As ill-ListrItted it is si-io-@vn Is L@elll(, coii-ipose(I of sel-)arqble memb-.i@s restidg -Lipon th,- 20 of a shallo)@, A-vli i-eli foriiis a fil epot. TI-ie i-aaln body I-,)oi-tion oi-' tho stove is 6 5 coml)osed of a 7 i),@efer@ibly formed ti @,l of sheet, metal of s i,,, ble thick-,Lless. This is shoki@,@ ,is being seciirecl at I'ts lower end to the otiter surfa@e 6f the castiny 2. Surroiincliiio- this c n , e 70 ),Iiiiclei- 7 is ft sk-6lefon frani ivork which at the froiit side of the sto@,e is Mqde of slich sl-i,,tpe as to s o i,@ v, c a s.,,i c .i s i n.9; o r '@ra,.iie 21 forming ,t cloor oi)eniiig anci to Aihich ,i d.oor 22 is sec-Lired. At its -!,eir sicle aiicl. - ,t s-Licii otlie,@@ suitable I)ointS IS (-Iesil-ed 75 this rlILy consi-st mainly oi- Aiholly of - ,Terticgl sti-Lits or 1)osts 23. The Tuiletioll of these posts is ch@-efly to for--Ln ' slll)port'somewhat more slibstanti-al thtn the plcttes formina the m,,tin cvliiicl er, T-or the ;.iiverted cloill e 80 or t)oi@-.t 3 iahi@ii forms the upper -wall of the fire box. This iiiver'ed doine 3 is a cts!,ino, -,-,-hich L in its rilaiti bo@ly is of sufficiently less di-Lme-- ter than the cliameter of the cylinder to pi-o- 85 vi(le aii ti-inLilir o,,is passaae bet-weel itself Lder.- This p ' a--,-id Li-ie cyliii assa(-e 30 extei-icls eiitirell @T al)oi,lt the ini,erted -dom'c,, 3 e@cceptiiig Avliei-e ic is interplipted by the ai-ins 31 which L cx'Lclld 'o the cylincler 7 aiid form spteers 90 aii(l. it is i.1-itel-i-iij)tecl at [lie rear I)y the :fiiie i@2 i-vhiel-i to the o-Liter cyl.incle-r ,@nd foriiis ,i,n air inlet flilie. As illtisti@,@lu-e(I this iiiv(,rte(-j dome 3 is of f,,I,)proxirr,.,t'L-ely heini-splierical sh,,tl)e. To its 95 'de i.t li@is S(,ctii,ed t evliiider "I I 't -)ell oi, opell Si oi- cli,iin) 41, ,ilso -foi-med of slieet iiietal"' i@,hicli is spacel from the oiit(,i, eyll'nder '@ so as to forill aii aiintilar flue for tl-ie o-ases ('o escape. l@t tlle "PP-01- end of the cylinder 7 is I)ro- 100 A,ided a u.),s ese-,i)e opeiiii-ia 33 to whieb t sn-ioke pipe ma!T be att,,i@hed. The tw, o clrilll@'is or eylincle@s 7 ',tllcl 4 ,tre coiiijectecl. it tlieii, Lipper elicls. A castlno,- 5 servii-i- a siipport T-or the 1,05 iii- filtei, an.cl a 1),,tssa(ye for tl-ie air to the (,Ioiiie i'), is sociii@ed to the , s iv@hl("."l ,Ilrrouiid the f-lue sec,,t-ioii 32 of s,,ii.cl cloi-i-ie. Tlis e,,,.stin(, ttirns doii,n-",aT@cl and h,,ts an doiinv,,ai,cllv faeing bell 50 to N,-@,hich tlie 110 fi.Itei-in(,, ipp,,iratLis is secured. This filterin('-, al)para'L-us is ecmposed of a soi.,ies of ctstkii,- 2

fr-Listilms Or coiios 0, 60@ -@Ti(i 61-, wliieli. -@re succ@essively of smitller sive ,Lnct tre ilestecl '@il ea(.II otlieitl-ie i@,iuh- suceclss'i-(, frustums of cones beino_@ placed so as to hltve their tape 5 -i- extendiii- in opl,)osite directioiis. 'I'hese aL,c composecl of a filtei-iiio- fabric@ as clotli, o-E suit-@ble iieave and have their Lipper ends secured to a spider 62 i,@hich is seei,i-i-ed to the lower edge, of the bell 50. 10 A-, @,ing 63 is secilrecl to the lower ends of the tnio cones 6 anci 60 so as to hold theni cl.oy,vn -Ln@ ,i wo-iglit 64 is pl,.icecl ivitl-,in the @clos(,d eiacl. of the '-.anermost tube, 61. @ I The iiliole inay be enel.o-qi-,d by a cyliiider i5 is 65 of sheet me'u-al. This oyli.nder and tl-ie i,ipper spider 62 iiity bc,, seciired to the botto,n ol': the bell iii aay sliitable m,,Lnnei@. The 11'1,,Lniier illus'LlrtteO, ilor secliring this restilt is -u'O provide the tipper ei-icl of the shell 65 -,Yitli a rin(y 66 to whi-eli is sec@tirecl boli's 20 t, 6'( pivoteci so th,,tt they may be swlin(r iD vertie'll pl@ines. These bolts are provided thi-onb iiiits and are desi.g,.ie@.- to ciiter slots in the flaiige 51 -kilhich ternallittes the 25 loiver edge oi' tl-ie bc,,Il 50. The spider 62 lias ,t liaiio-e e,,@tending otitwLr(Ily ,iiid designed to be clampect between the ring 66 ,,tiid the flange 51. The enclosing cylinder or sliell 65 preferablv exteiids to 1-iear the floor. NVithin this %i-i(I belovj the filtering parts 60, 61, rooin is provided for th-, reception of a I)an as 68 for fhe receptioii of dust which may -1'-all 4@.roiii the filter,@ng u-iembei@s. Spaciiiol 35 lugs as 69 i,,,Ill hol--l the pan central. The lower enci of the shell 65 may be provided Avith L door for the convenient placing a;nd rc,,-n6val o)' the clust pan 68. I I)i,efer to p,,,ovide the ali- liqlet assagc, p 40 5 Aiith aii air iiilet vqlve or valves. TI-iose er as coiisl.,,,ts of -,L spi,(l 1,415,349 di-ftrneter th,,,.n the mo-Lith of the dome 3@ tlius leaving an anniilar openill(, 80 sura i-otincliiig the plate S. This causes the 'ir to largely pass LLp adjacent to tlie ivall of the 65 cylinder 4. 1 also J)rovid e this drum with .t series of perforatiods. 81 scattered --bout its slirface through whicli the air will escape in fine lets. The upper end of the iiiner drum !- m,,ty 70 be left open so that the @tir heated therein i@,ill be disch,,trged directly into the room. If desired however be connected I @ p i p e s m t y therewith so -Ls to condilet the ai@ to the point ivhere its dischar(ye is desired, iii the 75 siine mai)-ner as employed in connection witli hot air flirnaces. By t-l-i-- constrliction employed the hett.of the gases caused by comblisti.on NVill be more thoi-oughlv extracted and trtnsferrecl to the 0 air@ - to tl-ie ihic @ 's dise harg ecl in, roo ms. The stove it i.9 believed ii, I be more e'iriciei-it in i.ts utilization of the heat of the I-Liel than ordin,,try stoves. Tts type of coiistrLiction is such th-,Lt it may be el-ieaply btiilt 85, and easily repai.red. The manner of filteriit(' the air employed Avill tlso result in cleliveriiig ptire air. The filterin(y deitice if desired niiy be corinected witl-i ,t que or pipe aiid this c6p-iiected With the outer air so th,,it go all or p,,Lrt of the ,iir employed may be drlqnv n from ivithoiit the room. Wh,@tt i