claim as otir invention: 1. A heater comprisina in coiiibination an up@right cylindrical str@-c@iire defining an internai lieating chamber closed at ti-,e uppeiend by the dome, the peripheral wa'lls of said structure and 'Ulie walls of sai(i dome a water chamber a fltle o.-as outlet at the 10 I lower encl of saicl striieture, a refrictoi-@, coi-e extendinu axially into the lower end of s,,iid zn structure, a series of heatino- tubes disi:)osed in said liettino- chtip-ber abo-Lit sa'd coi-e iiicl 15 connected at spaced points to said Nvater chamber, burner means in the upper end of said lieatino- cliamber, and means for ventilating the upper end of soid heatinz chamber. 2. A heater comprisino, in combination, a 1 20 base constituting a flue-gis outlet, a boay structure on said base defining -n Lipright heating chaiiiber, the upper end of which constitlites ,i combiistioi-i chimbei-, a i@p@-'i:rletoi,y core exten,-Iin- from said base ceiitrally into n 23 the lower end of said heatina chainber It plurality of heatiilo, coils disposed in said heating chamber abo-Lit stid core, said coils being con,.iected ft opposite ends to said ivateichamber, a plui-ality of p-ripherilly spaced .,o burners openino, to said combiistion chamber, and meaiis for ventilating said coinbustion chamber. 3. A heater compr-Lsing, in combin-,ttion, a he,,tting chamber, burner iiie,,i,-is iii saici c@liiin,,5 ber, means for supplying fuel to s,,iid burner means, means for suT)pl3,ing air to said burner means a flue glis outl,-t for sai-d chaniber. means for ventilatin(, said chamber, anci means responsive to the stipi)ly of air to saicl 4(j burner means for renderinwsaicl ventilating @ I means iiiejffective. 4. A heater coi-iiprising, in combii-iation, a lie-,ttinchan-iber, ,t central core in sairl ber, btirner means in one end of said chamber, 45 ancl ,i series of concentrically arrangecl coils di-sposed aboti.t s,,,,id core, the spacino,- between the ttirns in s,,iid coils decreasingprogressively 2ror,-i sa'OL heating iiaeans to-ward the other end of said chamber. 5o 5. A beater comprisiriu, in combination, a hollow base having a flue gas outlet, aiad a stack connection conununicitip-g therewith, a cvl.'Lndrical upright body strticture on s,,td @,@se, said boct-y structlire comprisino- two conr) centrically spaced outer walls defini@-ig -Ln annlilar peril:)heril -water chaiilber, saicl body struettire beina sectione,-l vertically, a refr,,tetory core extendino- fi-om said base centrally into the lower end of said bocly str@,icture, a 6() series of heating tubes coiled about sa;.d coi-e, the lower ends of said tubes being co,-inected to the lower end of said water chamber, the upper ends of said tubes extencling outwardly between t-wo of the sectiotis of saicl striiettire 65 and being connected to the iipper end of said water chaiilber, a plurality of spaced heating means disposed in the upper sectio , means n for supplvinz water to tl-ie lower end of said water chaml@er, means for taking o:ff -water from th'e upper end of said -wa-ter chaniber, ,i 70 gis outlet opening from said upp-:,r sectioll, aiid pressure fltiid diseliar,o means iii sai-Cl outlet aclapted ivhen operated to prei,ent the (- Iischarge of gas throii,@) said oiitlet. 6. A lieater compi-isino-, 'ia coiiib;iiat'on, -,n 75 en I til.)i-ight sci-tictiire d,,,'nniii(y ,,ji ilnt@-riial li(-@a'@- iiig chimber, s,,tid cliqpiber baviii(, sl)a,@,-,d pe@n ripheral walls defiiiiii(Y a A@,ater (,Iial-rll)el-, a doii-le closirig the upper onO. of said lieatiilg cham ber, a flue gas outle'L it the loiver end of 80 said heat@ing chai-riber, ,i re-L'rictoi-y core e@,cte@iding centrally ip-to tlle lolver eiid of saici heatin - chai-nber, a series of heatin- tubes clist, el posecl in said chamber abo-L,.t said core and conne cted it spacecl poiiits to sai-d water 85 cham ber, and lieating iiieans in tile, upper end of s,,Lid heatin& chamber. 7. A heater, compi-isin(" ill coi-.Ibijiitioli, t base constitutidg a fltie (ras outtlet, a Lody n stiuc'uure oii s,,Lid base clefiiiiiiy aii uj,-ri,,-Iit 90 heatin g cliambei- openintl-,, to s,,iicl bas--, the upper eiid of -@vhich co-'Istitittes a coml-)tistiori eliamb er, a core exteiiding @froiii sti.d base centrally iiito the lower ,r)d o@" said hattiii,@- z@ cham ber a plurality of heatii-i,y ttib-,s dis- 95 posed iii stid heitiii-9- ellaii-iber about said core, sai(I tlibes beiiig coiiii(,cted at ol)positc, eiids to stid NAater eb,,iii-ibei@, and a b-criier openin g 'Lo said combustioil chaiiiber. 8. A heater coli-iprising, in coi-ibinatioii, a 1 00 be,,itin (y chamber, btiriier illealls in said chaiiiber a flue (ras otitlet foi@ said chainbcr, exbaust ineans opoitin(- trom saicl cliamb-Ir for i7eiitil ating said chambei-, aiid ',I meails for clirect iiio; a streai-ti of pr,,@ssure fluid from slid 105 exliau st iiieans into said cliamber to prevent the exit of (rases through said exhaust iileai-is. 9. A beater comprisiii(y, in combinatioii, a lietting chamber, buriier meails in one end of said chainber, a series of concentrically ar- 11( ianged tube coils disposed iii the otlier eiid of said chaniber, the spacitig betweeii the 'Uui-ns in saicl coils clecreasing pro(yressively from saici heating means to-ward said otber en,,l of said cliambers, ancl ineaiis for iilthdrawil-ig 115 fltie gases from said otber end of saici chamber. 1 0. A heater comprising, in combiiiation, -,t hollow base haiiiig q flue (yas outlet, aii - tiprigl-it body structure oii sticl bise, said - body 120 stru cture coml3rising tivo spaced oiiter walls clefinino- a peripheral water said body structure beiii,)- sec'uioned vertically, a series of heatin- tubes iii slid structure, tile lo-wer e.,ids of said tubes b,-in.- coni).octed to 125 the lo-,ver encl of saicl v,,-,i( 'er eL, ainber, the tipper encls ol s.,iid tubes extendidg olitwardlbet-",een tivo of the sections of s--icl structure - ,nd beino; connectecl to the uppei@ end oi said water chamber, a pltii-ality of spaced heatina i3O m

means clispos6d in @the upper se6tibn,; means for supplying water to said @vater @chamber means for taking off water from@ said water chamber, a,, draft outlet for@ ventilating said UPP@R @ seetlon and, pressure fluid discharge riaeans in said outlet. adapted when oper.ated to prevent the discharg6 of (ras thro.@-gh sai(l. outlet. in testimon wher6of w6 liave hereunto af y fixed oiir signatlires. CHARLES !B. PAGE. ALBERT C. KALK 20 25 30 44 45 (;O@

Patented Oct. 27, 1931 198299535 ,UNITED STATES PATENT OFFICE CHAR7-ES B. PAGE, OF :EVANSTON, AND ALB@,'@RT C,. OF C-TIICiLG@0, ILLINOIS, ASSIGNOP,@s, By l@li,:SNE ASSIGNBIE-NTS, TO THE G. -VI. -@R-UST, OF CHICAGO, ILLINOIS, A COMMON LAW TRUST WATER HEAT:ER Application:dled Noveinber 2,1928. Serial l@'o. .116,6,@9. The prese-ut invention relates to improvements in water heaters and steam generators. anot. has particular reference to devices o@ t'his kind ad,,tl)ted for use in heating systems for buildings. In heaters Litilizing gaseous or vaporized fuel, some fuel is likely to leak from the burners into the coi-nbustion chamber during idle periods, thereby causing danger o ex10 plos'lo,.is v;',-ien lightiiio- the bum, ers 'Lo st,,irt up operatioii. One oft@e important objects of the preseii'Ll invention therefore resides in the provision in a novel heater utilizing a gaseo -Lis or vaporized fuel of means for ven15 tilatin(y the coriabustion chamber during idle periocts. Ano@Lher object of the present invention resides in @Lhe provision of a new and improved walt-ler heater in -which the -water is 20 given a r@ipid cirelilation so as to improve the efficienev of heat transmission and to accelera@Lle the eirc-Lilation of the water through the lieating system. 25 A further object resides in the prov.Lsion in a wqter, heater of a novel arrangement of heatino- ttibes whereby a more nearly uniforil'i Vel@eit3T of the products of conibustion in passing over the tubes is maintained. Other objects reside in the pr6vision o ,t new aiid iml)roved -water heater which is effici,,,iit in operation, tncl economical in ftic-I 6onsumptiop., in which the water is heatect rapidly, which is simple, inexpensive and cop-i@--,act i consti-i-ict@ion -,vhich is easily as35 semblecl iiicl disassemblecl, and in which a counter flow is provicled between the prod-Lict@ of coinbu@tion and the water. Fur'Lher objects and advantages will be,come apparent as the description proceeds. 40 In the accoin-anying drawings, Figure I is a horizontal@ sectional view taken along line 1-1 of Figure 3 of a heater embodying the feattires of o-Lir invention. Figtire 2 is a horizontal sectional view 41 taken along Iiiie 9,2 of Fi,-ure 3. Figure 3 is a verticil sectional view taken aloiao, line 3-3 of Fi,)'ure 1. AlThile the iiiveiitio'@ii is susceptible of variotis modifications aiid al'Lernative constructions, we; have shown iii the drawinos and 5o -will hereil'i describe ill detail the praerred emL-odimei-it, but it is to be understood that ive do not tliereby i-litend to limit the inventi on to the specific f orin disclosed, but intend t o cover all iiiodifications and aItCrnatiVe 5 5 c onstructioiis fallino' within 'che spirit and s cope of the inventioii as expressed in the a pi),eiiede claims. e , ,,@ ng more i)artictilarly to the drawi n(rs, the heatiny unit shown may be USed 6 0 e ither as a -waternheater or a steam generator, b ut for convenience of description will be d esignated hereinafter as I water heater. The ivater hzatei- iaaay be of atly suitable f oriii, aiad iii the preff,@-.-i-ecl eiiibodin-ient is 6 5 g eiier.-,Ily cyliiidrical iii shape and disposed v ertically. ,tiid coiiiprises a body .,tructure 10 r estiig oii i base 11. The iiiterior o'L the body st i@ucture 10 ecnstitutes a vertical chamber c losecl at t'lic Lipper eild by a dome 12, and 7 0 o pc@iiiiao-attbelowei-eiidintothebasell. Of n ' ciie chamber, 'LI)e uppei, eiid is utilized as a c onibuslioii cliaiiiber 1.3, and the lower porti oll 14 is Litilizc(l 'Lo eiielos(@ heatino- tilbes 15 f or the water. 7 5 Any @iesired ntiii-lbei, of sultible burners ri iy be irov@Cled 'or t',-i(@ coiiabustion chamber 1 3, and these i-nay be arran(,ed in any suitable iiiai-iner. In th-, present ilistance, eight burners 16 of stardarcl construction niounted 8o iii peripherally spqced relttion in the side ivafls of th(- bocl- u .@ s'-i-Lictiire are provided. While Lny sLi@.tit'ole fuel may be used, pi-eferably 'Lhe bLirne@@@s 16 ai-e adapted to burii gas, aiid to this coiiiiected to t -as line 17 85 tnd to an aii- line 18, leading respectively to stlitable sources of - ,is and coiilpressed air el (ijot shoivn). The base 11 iiiav I)e of any suitable constructioii, and iii the preseiit iiistance has a go

periphe@al side wall 19 and top ancl botton-i 'A'alls2O,,ti,.d2l. Thetopw,,ill,20has@aeircular opening.22 coiamtinicating with the tub@e chainber 14, and the m@arginal portion of th6 w,)Il about the opeiiing servies to supp(>rt the bod,@ striict-LLre 10. @:A circular upstanding fltnge 23 coiieentric with the opening 2@ serves to locate. aiicl hold the body structure 10 in pos-i-tion. The 4ase 10 is formed with a 10 lateral-extension- 24 having a sta6k otitlet 9,5@ ai-id tl-f6--'int'er'io-r-@th@e'ri@of co'n@fitut@lls,"a ok,. @bo@x or cliaiiab@r 26 providin a, ga8 outlet tilitiation of tlie, ivall 30. ino- be9 J-roin the cl-iqmber 14 to the staci@. vv7heil. gp,@ particularly conimeteial'g" l'is 'd -r may co 15 Ilse -@ f Liel -watei@ vapo ndense--o @ut 6f'the prod-Licts of co-Lnbustion as the latf,-r are cooiea to below the evaporation temper-t6 tY at-Lire in the coiirse of their passag6 e@ IlLse 'I'o drain ofl this co densate, the b 11. 2o botuoir@ wall 2'-- is inclined. and is pr6vided ith 'a drain o L)enino, 27 'at I its lowe@rmost poiiit. The body struettire 10 is form@d with a,peripherat or surrouiidin(y vvater.- ch@mber 28 25@ ir, the pregent instaiiee about the-111- ferior,@ and to thi,,, end hAs inner; and t,-Oi@ipbei,ally spaced walls 29- and 30. @ The lower;'e3id of the wat-er chamber 28 is dos@d by _an@ end @,vall 31, @iid the upper end opeiis @o@ into the interior of the dome 12'which com prises @o@ItNv,,ti@dly 6onvex s@a6ed il'iner and oL,Ler@wtll8:32,@,ind 33. The buriier@:-16 @re@ liaolinted in adntilar w@tl'is 34 o.peninothrou(,Yhti@ie -w,-az@@r chai-nber' 2S. Z;5@ Pref orably, f o@ coiiveiiience in consttiiction' ,i@-@d iii'asseiiibly,aTi(i disas@eiiibly the,body liet Li f-@e - 10 is -forme,,l iii @elo@ed Lipper and bein& f opii-i@ed integral with the dome 12, a d 4o@ the@ secti6iis beina ri idly, secured together, -9 "is by iii6a@.-is of lu.@,rs 37 land -bolts 38.1 A plu-@ -r,,ilit.Y 0-f @peripli-erally spaced connections 39 ,,,-rve to @Pro-vide freo coi iiin-Linic@t'lons be't-weeii the sections. 1referably, the lower 41,@ qCi@t"@6n 36 al@o is divided into closed semit!vlindrical @ sectiops 40 @ dnd 41 @seciired tocfethei, in any@sliitable maniier, as by, ea m ns s 0 @ugs42@indbolt 43. The lieqtin o, t@bes 15 miv. be of any suita5o- ble fo@m and'-"may be arranged in a-ny suitableminiier@ Intl-ie,-presen'u,in@tanceth-ey,'are dlsi)osed iii ai,-,allnLllar s-Dace abotit a@eenti,al cor6 45 which rests on a@p6destal 44 bn -th bott6lil@wgll 21 of the base 11 and projects a _rl -ie heating ch@niber 14, @,tDd .515@ axi Ily i to t,, i@,hich iyjcef-er,)blv is@ of refrictory in-ateri,,tl.@ TI-ie heat,ipg tubes 15 in the pref@rred form tre @t r nged @n T-oiir -vertic@l C6neentric 6oil-s r 46 47, 48 at-icl 49 with tli@ tubes ofadjacen't 6a coils disposed in st'ICIggered@rel,@tion,@and@ each coil coi-.Qprises two@tubes 15 wound in @parallel.@ The ttibes .15 @o-nnpctecl:at tl-i-eir th-roi,igl-i@peripher,,tlly spacecl rattiiigs 50@iii the @v'all 29@@to +3!e lower@ e,hcl of '@th@ @Va'ter 6@@'ch@iiib6i@ 9-81 @azrld@afe conn-,cta d @ t-their-',al@l@6r "ower- s:e@tiops, 35 aiid 36, the upper section iT e-nds in P(,-ripherally spacecl relation to the upper end oT the water c'n:imber. Suitable plugs 51 are removably seciired in the wall 30 at poiiits dir6et,ly opposite the fittinas 50 to izive access t6 the latt@er@ Preferably, the 7,0 up@er ends of th@@ tubes 15 e . xtend out @of tlie.heatii-ic-, el-iai-@ber 14 through channels 52 f 6rmed iii the per -nd of'the lbwer sectioii LIP 36 and between:the sec'uioiis 35 and 86,- al'id open-to,the water ebimber,28 tlirotic'b.,kia oi,,eri-i@@ng@i@ig wall.-5,j conThe pac tiveen the twoes ll.- ii-i each coil gradually deetea es f m 'IL or'nee r.om t6p to bott6 iii eco@(i -id6ney of tl velocity of the prod-, so @with tlie te@i le ucts of 'cornbi-t@i-ion@to zde6tease. 2@-s!a rc@stilt, the i-clocity of 't-,he products of combustiori e i@ffihii@tained inore n arly coilst"ni. Feed water or' water returned from the heating system is -dapt@d'to enter It!-ie lower end of th-e w,,tter -el-ia-11.iibe-r, 28 -tb.ruiLgl-i @aii, @nlet pipi@, 5-4@ !-lot ",at6r,,or @stean,'i iiiay be' t-.iken off f-roffi @t',I-ie ulal:)er @end -of a wo@ter -cha-mber, a-nd.in th,e -1@reseiit insfance:thi@ idolD-,,,,'thro-Li-orh @ pltiralil,,@ of take-off pipes 55. When- aaseo,,is--or varo,,ized f-Li,,l is Lised "P , a certain @@ahiount of leak.@'g6 'Tr -ona the -Lurners 16,may oce@ir d.,,Lirirg ieLI6 @)eriods. This lectli-,tge will @olledt in@the com bustion.el-ia'mber 1,9), and unless reirovecl may resiilt in explosions wheii aoain,startiiio,,up the,liev'ce.r. To prevehtt;hls slii,ta@temeans,isprovideciforveiitilating t-he: c6mb,,i6-tion eha@iiiber 13. In the 'present 'inst-ance, this@me,,ins co@.iiprises E,,ii op6iiing-@56 thrbv.-h'the cei@t6, of the doiiie 12 ancl connectccl b@-a pipe 5't t6 the ,ztack. Disch@,t'tgKti:g,.doivilll,,irdly in, ol@,6ning -56 is:an a ,ii@zzle58-ad@@pted,io7b connectedton,@iiitable.,source.--bf dir,tinde r pressitre, such @,is the line; The 'no.zzlc 58 'zOrvOs tO suPPlY sce- 165 ond@ry air 'of @eQn-tbustiQn during @'tl-ie bperatioii@ and,@iii 'o (Iolii--'serves to prevent tl-ie, fuel gases ana the T)roaucts o-@ combi,- ,stion h@om @leaving @the combustiop chrimber 13 throLiohtheo,,)oni-n(-r56. Dur'ingidleperiods the SUPI)IY of air7to tL)b T-)OZZle 58 i-s cut OA. -Tt w il-be ovident thit we hitve prbvidecl@ an adv@,tnth,ge6us w,@d-ter,liedter -in v,,hie-ii daii"er of frorn -gases @collectiiig iii the c6mbiisti&ii-ch nab i aioidc-d. in-wl-iieh -t-h !@r ,s e wa-ter -is heited -quickly and has a rapid C'lretlation which is and ine4.,.peiisliTe illcoiistri-ic@tion-aiid readi.1y, Eis@,ewbl.ed::ind dis-I assemble_ci, Rnd in Nv@@.i6h t-he walls 6f th6 c6rhbusfi6n-chainber ar prot6qteet against overl@io e i. g, hea@t@ n : bv inea-.ns of a -ivater j @icl,-et fo rmlnol part 6f the eirculato y-syst in@ Bv reaso e n of t4e-ai@ta-ngement of tho b-Li e r4 rs in peril)herally',i)a-ced fel,,ttion@so -,,Ls -to dii@ect 4,-he--fla'me-S g@enerallv t6wa-rd -a, @@cominon @e@ter., 'Iii,4 -ihe l@@5 disp,6siti<)n@,of,the@ai@ no-zzle,68 to discharge theflamles are caused to.,-b-6'de-ffee'ted, d6wnw,,-lrdly towar'd thje,i@6te 45 '@ther6by @causing'the il-alter a, to become A-s@ rtsult,-the 1'*

1,826i,535' 3 iiiner coils 46 ancl 4@ about the core 45 ai-e heated approximatelv the sariie exten'u as ,-lie .1 outer coils. We