US1877421A - Heating apparatus - Google Patents

Description

@ E35 A E, MUNKEL 1,877,421

HEAT NG APPARATUS Filed April 22. 1930 4 Sheets-Sheet l INVENTOR ATTO RN EY-a sept. 13, 1932. A, E MUNKEL 1,877,421

' HEATING APPARATUS Filed April 22, v195o 4 sheets-sheet 2 Sept. 13, 1932. A. E. MUNKEL HEATING APPARATUS Filed April 22, 195C 4 Sheets-Sheet 3 mvENToR T7/K M ATTORNEY:

'Sept 13, 1932. A. E, MUNKEL LSF/7,421

HEAT ING APPARATUS Filed April 22, 1930 4 Sheets-Sheet 4 INVENTOR atent'ecl Septf 1x3', 1932 UNITED AnoLrH n. VMUNKEL, ononnmnnsuomo Humanay APPARATUS, i 1

Appneation'iuea A prn 22,

This invention relates to heating apparatus and is particularlydirected to a gas attachment or hea-ter'adapted to be used in lcombination with a. coal burning furnace; y This gas heater has applicationto a previouslyiny l y u AAVstructlon of the gas heater and to the arrangestalled coal burningfurnaceor can bersold and installed in combination with lthe 4coal furnace.

Heretofore when lthe gas heater was ,being used, the coal furnace was entirely unheated and constituted a dead heat radiatingy area. Itis therefore an'object i of this inventlon to provide a heating 'apparatus includinga gas heater in which not onlyV is' an extremely great heat 4radiatingarea 'provided in the gas heater but which gas heater also by means of'conne'ctions between the respective combustionchambers makes use of theentire 'radiating surface of 'the coal burningfurnace.

By this arrangement it is provided that the heat which ordinarily'passes out through the fume vent of the gas heater and is wasted, is directed through the combustion chamberof the" coal burning furnace and thence outthrough the'smokepipe of theaforesaid furnace. Due to the length 0f travel of theheat and the lconsequent increased contact 'with heat radiating surfaces, theA Vpresent appa- Y Y ratus achieves the greatest possible efciency.

It is another obj ect of this invention to provide a gas heater for use in combinationl with a coal burning furnace which is extremely.

easy to install and requires very `little alteration of the coal furnace to which, it is applied.

It is another obj ect of this invention to' provide an adjustable baffle or plate for directing the return fresh air coming in"through the cold air duct either through" thegas heater or for deflecting it away from the gas attachment into the region of the coal burning furnace. This baffle, therefore, functions to prevent the passage of coldl airthrough the.' gas attachment froml whence Yit mightproceed to the rooms of jthefhouse .in unheatedcondition. f

iea, a serial'V N. 446,229.Y

vAnother'v object of this" invention isv to .provide a` gas heater which in 'itselfghas an' surface. u 1 Other objects relate to` the general conextremely great 'area vof heat ``radiating nientofthe gas burner relative to the heating surfaces aswell as theconn'ection of the connecting conduits or flues extending from the gas heater tothe coal burning furnace where by these nues are quickly attached tothe coal burning furnace.

Further lobjects certain advantages will Vbe more fully apparent'fromfrthek description'of the accompanying drawings, in

which Figure l is arpe'rsp'ective view loking'to'- ward 'the Vforward corner loffthe combined gas heater and coal furnace landillu'strating u the casing which'surrounds this apparatus dot and dash lines.

Figure 2 is a perspective view ofthe heati ing apparatus showing it in relation to a coal 3-e3, f Figure 1 `detailing" the interiorI of the gas Yheater'and `showingthe connection vef its lcombustion chamber with the combustion chamber of the'coal furnace. f v` `'Figure 4 is a sectional view ktaken online 1;4, Figure 3, further detailing the interior ofthe gas'heater. t Y

Figure 5 is a top plan'lvie'w of a' lmodified `:combination ofgas attachments and coal furnaceillustratlng two gas-furnace heaters ar'- l ranged, one at each side of the coal furnace.`

' Figure 6 is a lperspective view of one of the gas attachments used in the Vdouble arrange- Yment'shown in Figure 5.1" s f' The gas burning heater unit orattachment y "10,\as,applied toa standard coal furnacev '1l is shown in Figuresl toll:A inclusive, of'; the

drawings.V This conventional c oal furnace,

Y comprises, a base plate 12, an ash pitcasing Av16, these elements beingmounted one upon chamber.

the other inthe order described.l A front plate 17, is bolted to the snout 18 of the ash pit casing 13 andthe feed snout 19 of the combustion casing chamber 15, this plate having mounted thereon the respective doors 20, 21, for the ash pit and the combustion The shape of this type of'furnace is generally 'circular and the Ybase vplate 12inclu`des a circular flange 23`mounting the lower end of the circular Vcasing 24 enclosing the'afore-f said furnace elements;` .This casingl24 is t nace. The respective casings 24 and 26 are formed of sheet metal Yand surrounds the heating elements being attached'i'toxthe-re-J- spective sides of the front plate. A flue or smoke discharge snout 25 extends from-the rear of the radiator. s Y

' The gas burning heater unitiisT mounted at Ythe' rear of the` coal burning furnace after thelcasing'thereof has been removed (in those instances ofsinstallation where the cfoalfurnace has beenpreviouslyinstalled). A :casd Ying 26r isf'provided withl thegasv heater for' connection to the cut-awaycoalfurnace CLIS- it is therefore avery simple operation l toreconstruetthe casing'toproperly surround 28-f28. The inner 'wall'27a of the gasbnrner thecombinedE gas burning heater, and the coal casing has a horizontally-arcuate portion to y'the circular. fire AboWl and'. combustion 'chamber-of the furnace, this @nabliaglthe installation. of the gas burnerA relatively close tothe coal furnace and therebyfnecessitating very little additional space at -thejrear of the furnace.

n cabinet structure, as described is on four legs 29, onel at each corner of its rectangular lower. plate. The upper and lower'plates include grooves 31- around.

their margins and the upper and lower edges grooves 31.

Radiator tubes are disposed: .within the i heater. casingbetween the4 upperA and lower pilates, theser tubes nesting over .circular fianges 34 formed in the respective plates, whichfianges are marginally disposed around openings; 35 inthe respective plates. The

Y I entire structure-is held together by, means of draw bolts ortie r'ods 36 extendingthrough the. openings in the upper and lowerV plates. The rods are headedl at their upper ends and their lowerends are screw-threaded'. The

of thel Aside 1 plates vare disposed-V in thel correct drawing tension between the lugs is applied bymeans of nuts 82, one on the lower screwY threaded end of each rod. This unit is set up directly behind the furnace and has 'forward legs disposed on the inside of the connected at their abutting edges by means ofra series of clips 26L on each margin of each casing. vAdjoining clips are drawn together this edssrf tigecesiss v 1 ,Af 'glSfrrblllnr 40 is mounted within the by means of. draw bolts to snugly abut fallblistori chamber 0f the sans. furnace' eX:

tending' between the tubes theeof- A-lThiS bllrrr' 'is rectangular. ill/Cross" Sectn @11d *is hOHQW, th gibs, vlO-lllf'thereflorn through a row of gas jets'41eXtend'ing around the .margin Of the berne? @e the ,upper 'Side thereof.' The ses Yburner is supported on lvlofwdel Plate hav-ing ribs4 42 'formed' there- 011501,@ @teach end. theief 01,1. the underside;

thesebs f fttngn seats, @est at GaCh. end 0f the lawyer plate; The, seats each consist of a Uf-,shaped lug 42 extending upwardly from the plate,A The burnerlugs or ribs 42 are 'inserted and rest between the arms of the respe@ive-lgusz of thev plate, f `VA gas pipev 44 enters' on fend of the gas burncrben'g screw threaded into thesaine.

,Ail @premiate ail: mxtlifemeeus 45 and fa door frame. 4T islinounted on the.y side plate ofv the. gas furnace, this door :frame having upperand lower.y doors 48 and49respectively hinged thereto. .ThejlfowerAdoor-V49; is below the butwardiyextendingfgas line and. controls the` inletf` for` supplyingair to the combustionchamberand as burner. It will be und rstocd'fthatthi door. must be open tow permit combiistion vinthe chamber. The

ppet doel" 48 is Off general utility and, in,-

@hides e Sight Opening 50S@- that the 00nditionof the gas flame. may be, )bserved.` Y

Toward. the; upper en d of the interior of the gas attachmenta horizontal baille plate 5l isv mounted-on .angle iron rack lugs 52. rlihe pipes or radiator' tubes. extendythrough openings in' this baffle' of: considerably greater. diameter for-'causing the products of combustion to move' upwardly adjacent the pipes for greater radiation andto'be' slightly rey i SOV.

furnace.

tarded sov as to be fullyeffective *inl heating the radiator area., There is. also` a 4clearance between theedges of the baiiie 'and the -walls ofy the heaterv casing compelling' flow the walls for greater' radiafrom the gas furnace to the atmosphere'.l In 4this instance, conduits 53,53eXtend from the combustion chamber li'of the gas furnace tothe combustionchamberof the coal side of the. gas furnace to the front plate' thereof as far up on the plate as possible .and above the baffle. l'The conduits 53, 53

extend from these fittings toward the front of the co-alfurnace an'dfelbowsA 57 thereof extend the conduits "inwardly toward the feed snout."r The 'connection of these con-Y duits to the feed snout:v is Vof the following construction. The openings to which, the conduits are connected' mustvbe cut'in: the cast irony snout of the combustionchamber of the coal furnace. An opening 56 slightly larger than the size of thepipe isscut into each side of the feed snout. `This cutting is done bymeansof a special tool provided for the installation of these gas heaters. It `will be apparent that these openings could be cast in the furnace ifV desired butthe foregoing Vap lies to the conventional coal "furnacef *xteriorly screw threaded sleeves 58,68 are inserted lin these openingsr and the'inwardly disposedends of theelbows' are inserted in these sleeves. i A pair ofl lock nuts 59, 59 on each sleeve'complete the attachment. nut on the inside and oneon theoutside firmly clamping :the sleeve to thewall of the feed snout. From this connection the products ofcombustion and fumes pass through the combustion chamber and radiato'rof'the coal furnace and then aredischarged intoFthe flue f of the chimney byway of the conventional smoke pipe. l l

Thefresh air intake GOjfor the furnace is toward the rear thereof just below the gas heater casing, there being a stub extending from the outer casing Vof the `combined furnaces to which a cold air co-nduitinay be attached, ifthe y'cellar air isn'ot desired. l From this intake' opening the fresh .e air passesupwardlv through the tubes of and around the casing of the gas heater, about the feed section and radiator ofthe'hot air furnace, `being heated by Contact' with allthese respective parts, and thence moves into the hot airpipes of the furnace to therespective rooms. y.

A certain space between the `rear wall of the gas heater cabinet and the outside casing of the combined. furnaces is convert-edginto a dead air space byzth'e insertion of a baffle 6l in the form of astrip of angleironalong-the A sleeve-55 is attached at each" In each connection there is a llock.

lower rear edge of the cabinet.' Ithas been found that, the rear wall of the gas? furnace A being adjacent the rear` wall casing ofthe furnaces, 'someradiation' takes pl-ace' from the i `outer casing 26 thus lessening theeiiiciency of theyfurnace; By. deadening this space-it is possible tovprevent this lossfa'nd -to make use 'oflthis radiation at other points.;E Y A For' the purpose 'of eliicientfiow'o'f-incoin-v Y ing air either'to the gas heater or to the coal furnace, amovable baliie `plate 62 ofthe followin'gnature isv 1vincludedfThisplate is hinged along yits inner marginon afrod Y mounted'in-end rails tattached between ,1.

ther-legs ofthe gas heater. The hinge point for this baffle plate is "slightlybelow the un- `dersurface offthecabinetand the baffle is of lesserarea than the 'area' of the floorof the W'hen the'gaslheater is in useand this'baifle -isnd'own /or positioned as Vshown in Figure l,

the incoming air is deflected into the tubes ofv the 'gas' furnace and circulates through thev tu'beslto pass'in heated condition into the heat f Vdischarge pipes extendingto the rooms ofthe house. -Thebafiie causes the majorpartof the incoming air to passlthrough theradiator tubes 'and the remainder d to flow upwardly about thegas heater casing. -yItis desirable- Y' to prevent'circulation of the incoming air around the coldlower region offthefcoall furnace. After the air moves above' theA gas Y heater,-additional heating is accomplished Y throughy contactwith the radiatorand com- 'bustion chamberof thecoal furnace.

`WVhen the fcoal furnace is being used, the f baffleisdrawn up tocause its rear end toen#v gage' thelundersidef of the cabinet.` This is accomplishedby means of-a chainfpattached l at one end'fto therear end ofthebaflie andv having a'handle on its other end. This chain i T passes through a notclrin'thecasing 26.' This notchis Vshaped and tends to maintain the chain in iixed'lpositionunless-the chain is raised and disengaged therefrom. -Wlren-the baffle is in upper position the result is to defiect the air into the region of the coal-fun Vnace and to blockthe entry of the-incoming coldair: through the tubes ofthe gas furnace. j

discharge 'conduit 69 for the products of combustion respectively entering opposite sides of thefeed Vsnout of the coal'furnace';` VThe door frames 70V at the'front ends ofthe'rel spectivel iunits protrude through and are mounted in fa sheet metal forward wall 71 of` the/furnace'.` This sheet metalwall has a depressedcentral portion to which the main `door frame plate/T2 kof the Vcoal furnace is attached.

-, The combination of the gas heater with the conventionalI coal furnace hasV made an ,extremely e'ective .heating apparatus in fthe present instance. When the gasheater is beingl operated noty only, is a very'ljargefheat radiating area being used in they gas heater Vbut the extremely large heat, area of the. coal furnaceis additionally utilized;V All the. ex-

.tra radiation resulting from the conduit conkao 'nection between the combustion chamber of the respective heating devices 1s made use of withoutV additional cost in the operation-of thje apparatus for the reasonfthat the prod,-

ucts of combustion from the gas 'heater are Yordinarily directed immediately tothe flue after they have passed through the gas heatl of' the gas heater to the heat discharge pipes of the furnace.

. Having described my invention, I claim:

1. In a gas heater unit, acasing constituting a combustion chamber, radiator tubes extending through said casing and providing passageways entirely therethrough, a gas burner disposed in the combustion chamber and extendingbetween the tubes, a baiiie. located across theinter-ior of said combustion chamber above said burner, said baffle having clearance openings through which saidtubes extend for causingv a retardedflow of the products of combustion around'alltthe tubes andk means for exhaustingr the combustion chamberfabove' the baflie. I

2. ,A Vheating appliance, comprising, a casing constituting a combustion. chamber, means'for supporting said casing, a plurality of radiator tubes extending between the topand bottom walls of said casing, the top and bottom wallsof the casing having openings Vthereinregisteringwith saidv tubes, a

baffle plate disposedin the upper interior of the casing transversely Vof said tubes, said baffle cut away tol provide clearance about said tubesy and' about the walls of said cas'- adjustable baflie for Vdirectingr the incomingA air l.either.tl'irough the air heating passageways of the'gasheater or into the regio'nof thecoal burning furnace as desired.

f 4; In aheatingv apparatus, a coal burning y the base thereof, a gas heater casing having -an arcuate forward wall adapted to be disposed about the coal furnace within said easing, a pluralityofradiator-tubes, extending verticallyl throu-ghsaid casing,-a gas burning element disposed between, said tubes,

and a plate disposed at the underside ofthe `gas heater-casing for directing or bafli'ing the air flow. lupwardly through the tubes.

5. A heatingapparatus, comprising, a coal eo furnaceya gas heater casing located at'the rear of said coal furnace'and having an arcuate forward wall'encircling: the rear porti'on of the coal furnace, conduits extending e from-'the upper end ofsaid gas heater' casing yand providing free ftow of the heat from the Vgas heater to the coal furnace for additional radiation from the radiatin-g'surfacesl of the coalfurnace, said conduits connected-to the y combustion cham-ber of thecoal furnace, a`

Vcasing surrounding-both the coal furnace and the gas heater casing, saidouter casing hava fresh air intake opening at therear of the furnacebeneath thefgas heatery casi-ng,

said gas heater casing including air heating passageways, disposed upwardly therethrough,and means for selectively controlling the fresh air either througlrthe air heating `passagewa-ys of the gas heater casing or tothe coal furnace. Y

,6. A heating apparatus, comprising, a coal burning furnace, a. gasappliance mounted fat. the rear of said coal burning furnace, said appliance having a'casing,includingy a for- A ward wallo-farcuate form` for encircling the rear of the coal furnace, a-,casing surrounding said coal furnace and gas appliance, and a. baffle plate extended between the lower rear edge of ther gas appli-ance casing a-nd the rear Y r vvall of the main cas-ing., of the-furnace for preventing the upward passage of Yair through the space between the lrear wal'lof the gas applianceY casing and the rear wall ofthe main casing of` thefurnace thereby preventing loss of heat through the rear wall of the main casing..

7.v In a, heating apparatus,fa coal. burning furnace, a gas heater mounted.. adjacent said furnace V'and' including vertically ydisposed air passageways therethrough, a main casing surrounding said coal burning furnace and said gas heater and including a fresh air inlet opening ltoward its base, andi support- Lilo leo

ing* means forsaid gas heater for positioning l the same at an elevationv above the fresh air intake, whereby the fresh air' may pass up-` wardly through said gasl heater and to the coal burning furnace.

Sek A heating'apparatus, comprising, a coal burning. furnace,af gas lieater'disposed at each side of said coal burning furnace including vertically disposed air passageways therethrough, a casing surrounding said coal burning furnace and said gas heaters including a fresh air inlet, and supporting means for said gas heaters, whereby the fresh air l may pass under the same and upwardly therethrough and to the coal burning `furnace. u

`In witness whereof, I hereunto subscribe my name.

ADOLPI-I E. MUNKEL.Y

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