[go: up one dir, main page]

US1423145A - Furnace - Google Patents

Furnace Download PDF

Info

Publication number
US1423145A
US1423145A US488648A US48864821A US1423145A US 1423145 A US1423145 A US 1423145A US 488648 A US488648 A US 488648A US 48864821 A US48864821 A US 48864821A US 1423145 A US1423145 A US 1423145A
Authority
US
United States
Prior art keywords
heating chamber
heating
chamber
combustion
products
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US488648A
Inventor
Payne William Franklin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US488648A priority Critical patent/US1423145A/en
Application granted granted Critical
Publication of US1423145A publication Critical patent/US1423145A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00Air heaters
    • F24H3/008Air heaters using solid fuel

Definitions

  • ruRNAoni f Be it known that l, lVi'LLrAM 'FRANKLIN PAYNE, a subject of the King or Great Brit aimi-esiding at lthe 'c ityofStrattord, in the province of ⁇ Ontario' n and ⁇ Dominion oi? usetul improvements in Furnaces', 4ot which the following isa specification.
  • This invention relates to'improvements yin furnaces, and the objects of the invention are to secure an increased eiiiciency in thev distribution ot heat,particuiarly in domesticr furnaces andthose designed iortheheatin/iij of houses and buildings', whether hot air or hot Water.
  • More particular objects oi" the invention are toA insure that the maxin'iu'm amount otY heat. units in the original combustiblegmate- Vrial is transferred to the'. conducting me-y dium, such as the air or Water by Whichitis conductedto the parts are to be heated.f f
  • Figure @ is a cross section'in elevation.
  • Figure 3 is a sectional plamshowing the air heating pipes.
  • Figure et is a iront sectional elevation.
  • Figure 5 is a. sectional'e-levation on the line :zex, Figure 4
  • Figure 6 is a' sectionalr elevation oi an alternative fori-n oft the inventionas applied to hot Water heating systems.
  • Y 1 Figure '7 is a sectional planlsho'wing the. layout Jfor pipes in the form ot theinvention used in Figure 6.
  • Figure 8 is a section on the line 8 8, Fig-y ure5. f y In the drawings like characters of refer#r figures.
  • A indicatesv thefire pot of' any suitable or
  • the grate is preferablyI formed With a plu;
  • 4ralityloi"pivoted grate bars 10 having depending lugs 11 which are pivoted toa shaking bar 12 andgwhi'ch may be manually re ciprocated by any rsuitable means,.' as for in-v stance, by a crank 13 connected to and turn the opening' closed by the door D.
  • Fuel maybe ⁇ charged into the fire pot through the l' yThe products of combustion ifrom'the fire in thefire pot arey adapted at the top of the turna-ce to be dividedy by partition plate and more particularly tothe i'oim of the invention shown enceindicate ycorresponding parts in all the convenientv designand B'the grate therein;V ⁇
  • thedoivn ilues communicate with forwardly ⁇ extending passageivays 21 ⁇ through thefreturn iiue 25 to the jup flue 26 1 at the back ofthe casing and from thence to the smoke pipe J Which leads to a suitable'r chimney.
  • the heat units therein will be imparted to the air chambers F, G and I. indicates one of the air heat ingY pipes Which rises from a ⁇ suitable point in the room to be heated ⁇ i I find it convenient to locate the opening oi this pipe'about threeinches ⁇ irointhe iioor.
  • ltthen extends into: the air heating chamber Ifand While in ico Avheating chamber' F or G.
  • These chambers F and Gr are each provided with a' plurality of outlets 27 which when the inner casing is not enclosed by the outer ⁇ casing will permit the heated air to pass directly into the room to be heated. It is preferable, however7 to enclose the inner casing by an outer casing O spaced therefrom and fromy 'which pipes P may lead to the rooms or plac'e toy be heated.
  • a hinged damper Q 'of any convenient lform may be provided adjacent to an openving 28 leading from the back of the channels 15 and 16 tothe up flue 26. 1f desired, a certain part of the products of combustion pass directly to the smoke pipe. This ⁇ will enable the fire to be started vmore readily.
  • the damper may be y controlled by a rod 29 connected thereto extending through the side of the inner casing and being formed with a crank 30 on the end by vwhich it may be operated. ⁇ the said crank, if desired, being connected to the operating'rod 31 leading to the forward lpart of the furnace.
  • an opening 32 be , provided in the top Vof the casing inwardly closed by the plate 33.
  • the inner casingitself may be supported from the floor or from any suitable base or 4legs 34.
  • FIG. 6 and 7 illustrates the in vention as applied to water heating systems.
  • the return pipes of the water heating systems are 'connected to serfire pot 48 pass.
  • the conduits 45 and 46 may be connected *byy the Y branches 48 and 49of a header ⁇ 50 larged from the bottom to the top and having apluralityfof distributing pipes 52 eX- Vtending from the top thereof and the saine header may be provided on the return end to combine the pipes from a ⁇ plurality of rooms int'o two lconduits which lead to the serpentine lcoilsn40 and 41.
  • What 1 claim as my invention is 1.
  • a fire pot In a furnace, a fire pot, a heating chamber7 conduits leading the products of combustion across the top, down one end and backwardly and forwardly along the bottom the heating chamber, and a serpentine heating coil in the heating chamber.
  • a furnace comprising a fire pot, a heating chamber, conduits leading the products of combustion from the fire pot acrossfthe top, down one end aindvbackwardly and for wardly along the bottom of the heating chamber, a serpentine heating coil in the heating chamber adapted to draw in the air to be heated at one end and discharge the lsame at the opposite end,l a smoke pipe connected to the said conduits being formed at one point withl a vdirect passageway between the conduit extending from the top yof the joven and the smoke pipe, and a damper controlling the said opening.
  • a furnace comprising a fire pot, a heatingM Chamber, a casing forming conduits at the top end and bottom ofthe heating chamber through which the products4 ef combustion are designed to pass, baffle plates dividing the conduits at the back and bottom of the heatingchamber in such a way that the products of combustion first pass along the top, then downwardly on opposite sides of the ends of the heating chamber, then forwardly beneath the bottom of the heating chamber on theLopposite sid'es thereof then returning separately beneath the centre part of the heating chamber' and then upwardl)T centrally at the back of the 'heating chamber,and heating coils located within the heating chamber.
  • Avfurnace comprising a heating ychamber, a fire pot and top chamber above the heatingchamber to which the products of combustion are designed to pass7 a baiie raam/is plate dividing the chamber longitudinally into two sections, down ilues at the end of the heating c chamber through which the products of combustion divided by the baffle plates are designed to pass to the bottom of the heating chamber, flues extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down ilues forwardly to the frontof the heating chamber and a central return flue on the bottom of the heating chamber, an up flue at the back of the heating chamber connected to the return flue, and a smoke pipe connected to the up flue.
  • a vfurnace comprising a heating chamber, a iire pot, a top chamber above the heating chamber to which the ⁇ products of combustion are designed to pass, a baille plate dividing the chamber longitudinally into two sections, down flues at the end of the heating chamber through which the products of combustion divided by the baille plates are designed to pass to the bottom of the heating' chamber, fines extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down ilues forwardly to the front of the heating chamber, and a central return flue on the bottom of the heating chamber, an up flue at the back of the heating chamber connected to the return ilue, a smoke. pipe connected to the up ilue and a serpentine heating ⁇ coil in the heating chamber.
  • a furnace comprising a heating chamber, a fire pot, a top chamber above the heating chamber to which the products of combustion are designed to pass, a baille plate dividing the chamber longitudinally into two sections, down flues at the end of the heating chamber through which the products of combustion divided by the baffle plates are designed to pass to the bottom of the heating chamber, flues extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down flues forwardly to the front of the heating chamber, a central return flue in the bottom of the heating chamber, an up ilue at the back of the heating chamber connected to the return ilue, a smoke pipe connected to the up ilue, and air heating chambers in opposite sides of the top chamber.
  • a furnace comprising a heating chamber. a iire pot, a top chamber above the heating chamber to which the products of combustion are designed to pass, a baille plate dividing the chamber longitudinally into two sections. down ilues at the end of the heating chamber through which the products of combustion divided by the baille plates are designed to pass to the bottom of the heating chamber.
  • a smoke pipe connected to the up flue, air heating chambers in opposite sides of the top chamber, said air chambers being formed with outlets through ⁇ which the heated air may pass, and a serpentine coil in the outlet discharging into the air chamber having an intake on the exterior of the furnace.
  • a furnace comprising a heating charnber, a fire pot, a top chamber above the heating chamber to which the products of combustion are designed to pass, Aa baille plate dividing the chamber longitudinally into two sections, downilues at the end of the heating chamber through which the products of combustion divided by the baille plates are designed to pass to the bottom of the heating chamber, ilues extending forwardly beneath the bottom yof the heating chamber through which the products of combustion pass from the down lues forwardly to the front of the heating chamber and a central return' ,flue on the bottom of the heating chamber, an up flue at the back of the heating chamber connected to the return ilue, a smoke pipe connected to the up ilue, and a plurality of serpentine heating coils'having inlets on the outside of the furnaceand eX- tending horizontally in the heating chamber and air heating chambers connected to the serpentine heating coils and extending on opposite sides ofthe top chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Description

W. F. PAYNE.
` 'FURNACL APPLICATION FILED JULY 30. |921.
Patented July 18, 1922.
6 SHEETS-SHEET l.
n -w-z- Vu?.- 1101? W. F. PAYNE.
FURNACE.
APPLIc/moN FILED JULY 30,192..
1.4235145. Patented Juy 18, 1922.
6 SHEETS-SHEET 2.
.Y mum/Tam;-
W. F. PAYNE.
APPLICATON FILED JULY 30, 1921.
PatentedJuly 18, 1922.
6 SHEETS*SHEET 3.
FURNACE.
w. F. PAYNE.
FURNACE.
APPLICATION FILED JULY 30,1921.
SMN:
6 SHEETS-SHEET 4- Patented J uy 18, 1922.
sHEETs--SHEET 5.
Patented July 18, 1922.
w.` F. PAYNE.
FURNACE.
APPLICATION FILED JULY 30;'1921.
W. F. PAYNE.
FURNACE.
APPLICATION FILED JULY 30.1921;
1,423, lc, Patented July 18, 1922.
6 SHEETS-SHEET 6.
AM im A i means.
- To all whom it may concern usare WILLIAM .FRANKLIN PAYNE, or
STIMTJFORIL ONTARIO, CANADA,
ruRNAoni f Be it known that l, lVi'LLrAM 'FRANKLIN PAYNE, a subject of the King or Great Brit aimi-esiding at lthe 'c ityofStrattord, in the Province of` Ontario' n and `Dominion oi? usetul improvements in Furnaces', 4ot which the following isa specification. This invention relates to'improvements yin furnaces, and the objects of the invention are to secure an increased eiiiciency in thev distribution ot heat,particuiarly in domesticr furnaces andthose designed iortheheatin/iij of houses and buildings', whether hot air or hot Water.
More particular objects oi" the invention are toA insure that the maxin'iu'm amount otY heat. units in the original combustiblegmate- Vrial is transferred to the'. conducting me-y dium, such as the air or Water by Whichitis conductedto the parts are to be heated.f f
are to insure that the heating current of air or Water should be heated to as hi glia temv peiature as possible before leaving the iurnaceand ythat the products ot combustion oi the fire in the furnace should remain'in contactwith the air heatingmeans 'as long as possible'betore leaving the furnace. 1 Further and vmore general objects ot the invention are generally to simplify and improve the construction of theffurnace to better adapt it to perform the functions required -ot it and it consists essentially Voit the improved construction and arrangement ot parts hereinafter described `in detail in the accompanying specification and drawings. Referring to the drawings'c-l Figurel isa longitudinal sectional elevation of an embodiment of the invention.
Figure @is a cross section'in elevation.
Figure 3 is a sectional plamshowing the air heating pipes. f
Figure et is a iront sectional elevation. Figure 5 is a. sectional'e-levation on the line :zex, Figure 4, n v Y i Figure 6 is a' sectionalr elevation oi an alternative fori-n oft the inventionas applied to hot Water heating systems. Y 1 Figure '7 is a sectional planlsho'wing the. layout Jfor pipes in the form ot theinvention used in Figure 6. L
Figure 8 is a section on the line 8 8, Fig-y ure5. f y In the drawings like characters of refer#r figures.
ofthe Vbuildingswhich n Y y opening closedl by the door E. More particular objectsk of `the iiivention-y slieciacapiiiaoftttei ratet. .Patenti-d July k18 1922! 1921; serial NQ. 483,648.
Referring to they drawings;
v in Figures 1'to 5,- Canada, haveY invented certain"v new and.
A indicatesv thefire pot of' any suitable or The grate is preferablyI formed With a plu;
4ralityloi"pivoted grate bars 10 having depending lugs 11 which are pivoted toa shaking bar 12 andgwhi'ch may be manually re ciprocated by any rsuitable means,.' as for in-v stance, by a crank 13 connected to and turn the opening' closed by the door D. Fuel maybe `charged into the fire pot through the l' yThe products of combustion ifrom'the lire in thefire pot arey adapted at the top of the turna-ce to be dividedy by partition plate and more particularly tothe i'oim of the invention shown enceindicate ycorresponding parts in all the convenientv designand B'the grate therein;V`
`will drop through the grate into the ash pit 1U from which they may be drawn through which will cause them to pass along channels 15' and 16.-tlie"outer side of thechannels 'being` formedby air chambers -F and G which' are thus heatedby the products of combustion, these chambers beingprolvided `with bevelled faces 17 at the forward endend with rounded faces 18 at the rear?y mostfend. The'products of combustion pass :trom the channels 15 and 16 to the down iues 19 and 2() which form part of the inner casing H of the furnace. t the bottom of the inner casingi thedoivn ilues communicate with forwardly `extending passageivays 21` through thefreturn iiue 25 to the jup flue 26 1 at the back ofthe casing and from thence to the smoke pipe J Which leads to a suitable'r chimney. During progress of the products` oit combustion in this Way, the heat units therein will be imparted to the air chambers F, G and I. indicates one of the air heat ingY pipes Which rises from a `suitable point in the room to be heated` i I find it convenient to locate the opening oi this pipe'about threeinches `irointhe iioor. ltthen extends into: the air heating chamber Ifand While in ico Avheating chamber' F or G. These chambers F and Gr are each provided with a' plurality of outlets 27 which when the inner casing is not enclosed by the outer `casing will permit the heated air to pass directly into the room to be heated. It is preferable, however7 to enclose the inner casing by an outer casing O spaced therefrom and fromy 'which pipes P may lead to the rooms or plac'e toy be heated. 1t Vwill be lseen that the air drawn `into the pipes K and Mis heated thoroughly in the heating chamber 1 by passing through the serpentine coils and is finally further heated in the air chambers F and G. e
A hinged damper Q 'of any convenient lform may be provided adjacent to an openving 28 leading from the back of the channels 15 and 16 tothe up flue 26. 1f desired, a certain part of the products of combustion pass directly to the smoke pipe. This `will enable the fire to be started vmore readily. The damper may be y controlled by a rod 29 connected thereto extending through the side of the inner casing and being formed with a crank 30 on the end by vwhich it may be operated.` the said crank, if desired, being connected to the operating'rod 31 leading to the forward lpart of the furnace.
For convenience in gaining access tothe fire pot, an opening 32 be ,provided in the top Vof the casing inwardly closed by the plate 33. The inner casingitself may be supported from the floor or from any suitable base or 4legs 34.
The alternative form of theA invention shown in Figures 6 and 7 illustrates the in vention as applied to water heating systems. In this case, the return pipes of the water heating systems are 'connected to serfire pot 48 pass.
pentine coils 440 and 41within the oven 42 which corresponds to the heating chamber I and is heated by the means described with 'respect to th'e form shown in Figures 1 te The outlet conduits 43 and 44 from the coils 40 and 41 pass to further serpentine `coils 45 and 46 located in a chamber 47 through which the product-sof combustion from the It will be seen that in the forni shown in Figures 1 to 5 the cold air will. draw into the casing at the bottom from the different rooms and as it passes through the serpentine coils and air heating chambers, is thoroughly heated and will become very hot. The conduits 45 and 46, for convenience in distribution, may be connected *byy the Y branches 48 and 49of a header` 50 larged from the bottom to the top and having apluralityfof distributing pipes 52 eX- Vtending from the top thereof and the saine header may be provided on the return end to combine the pipes from a` plurality of rooms int'o two lconduits which lead to the serpentine lcoilsn40 and 41.
1n addition to this, there is a certain radiation of heat from the` inner casing itself which Vwill either heat the room in which it is placed or will heat the air in the outer casing. It is found by this means possible to effect a considerable economy in the fuel used to heat a building of given size.
As many changes vcould be made rin the above construction and many widely ldifferent embodiments of my invention within the scope of the claims, constructed without n departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and drawings shall be interpreted as illustrative and not in a limiting sense.
What 1 claim as my invention is 1. In a furnace, a fire pot, a heating chamber7 conduits leading the products of combustion across the top, down one end and backwardly and forwardly along the bottom the heating chamber, and a serpentine heating coil in the heating chamber.
2.l A furnace comprising a lire pot, a heating chamber, conduits leading the products of combustion from the fire pot acrossfthe top, down one end aindvbackwardly and for wardly along the bottom of the heating chamber, a serpentine heating coil in the heating chamber adapted to draw in the air to be heated at one end and discharge the lsame at the opposite end,l a smoke pipe connected to the said conduits being formed at one point withl a vdirect passageway between the conduit extending from the top yof the joven and the smoke pipe, and a damper controlling the said opening. p
A furnace comprising a lire pot, a heatingM Chamber, a casing forming conduits at the top end and bottom ofthe heating chamber through which the products4 ef combustion are designed to pass, baffle plates dividing the conduits at the back and bottom of the heatingchamber in such a way that the products of combustion first pass along the top, then downwardly on opposite sides of the ends of the heating chamber, then forwardly beneath the bottom of the heating chamber on theLopposite sid'es thereof then returning separately beneath the centre part of the heating chamber' and then upwardl)T centrally at the back of the 'heating chamber,and heating coils located within the heating chamber. y .y
4. Avfurnace comprising a heating ychamber, a fire pot and top chamber above the heatingchamber to which the products of combustion are designed to pass7 a baiie raam/is plate dividing the chamber longitudinally into two sections, down ilues at the end of the heating c chamber through which the products of combustion divided by the baffle plates are designed to pass to the bottom of the heating chamber, flues extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down ilues forwardly to the frontof the heating chamber and a central return flue on the bottom of the heating chamber, an up flue at the back of the heating chamber connected to the return flue, and a smoke pipe connected to the up flue.
5. A vfurnace comprising a heating chamber, a iire pot, a top chamber above the heating chamber to which the` products of combustion are designed to pass, a baille plate dividing the chamber longitudinally into two sections, down flues at the end of the heating chamber through which the products of combustion divided by the baille plates are designed to pass to the bottom of the heating' chamber, fines extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down ilues forwardly to the front of the heating chamber, and a central return flue on the bottom of the heating chamber, an up flue at the back of the heating chamber connected to the return ilue, a smoke. pipe connected to the up ilue and a serpentine heating` coil in the heating chamber.
6. A furnace comprising a heating chamber, a fire pot, a top chamber above the heating chamber to which the products of combustion are designed to pass, a baille plate dividing the chamber longitudinally into two sections, down flues at the end of the heating chamber through which the products of combustion divided by the baffle plates are designed to pass to the bottom of the heating chamber, flues extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down flues forwardly to the front of the heating chamber, a central return flue in the bottom of the heating chamber, an up ilue at the back of the heating chamber connected to the return ilue, a smoke pipe connected to the up ilue, and air heating chambers in opposite sides of the top chamber.
7. A furnace comprising a heating chamber. a iire pot, a top chamber above the heating chamber to which the products of combustion are designed to pass, a baille plate dividing the chamber longitudinally into two sections. down ilues at the end of the heating chamber through which the products of combustion divided by the baille plates are designed to pass to the bottom of the heating chamber. flues extending forwardly beneath the bottom of the heating chamber through which the products of combustion pass from the down ilues forwardly to the front of the heating chamber, an up flue at the back of the heating chamber connected to the return ilus, a smoke pipe connected to the up flue7 andl air heating chambers in opposite sides of the top chamber, said air chambers being formed with bevelled faces` pass from the down fines forwardly to the y front of the heating chamber, an up flue at the back of the heating chamber connected to the return ilue. a smoke pipe connected to the up flue, air heating chambers in opposite sides of the top chamber, said air chambers being formed with outlets through `which the heated air may pass, and a serpentine coil in the outlet discharging into the air chamber having an intake on the exterior of the furnace.
9. A furnace comprising a heating charnber, a fire pot, a top chamber above the heating chamber to which the products of combustion are designed to pass, Aa baille plate dividing the chamber longitudinally into two sections, downilues at the end of the heating chamber through which the products of combustion divided by the baille plates are designed to pass to the bottom of the heating chamber, ilues extending forwardly beneath the bottom yof the heating chamber through which the products of combustion pass from the down lues forwardly to the front of the heating chamber and a central return' ,flue on the bottom of the heating chamber, an up flue at the back of the heating chamber connected to the return ilue, a smoke pipe connected to the up ilue, and a plurality of serpentine heating coils'having inlets on the outside of the furnaceand eX- tending horizontally in the heating chamber and air heating chambers connected to the serpentine heating coils and extending on opposite sides ofthe top chamber.
In witness whereof I have hereunto set my hand in the presence of two witnesses.
Witnesses:
DOROTHY DUT'roN, LEON JosErH LONG.
US488648A 1921-07-30 1921-07-30 Furnace Expired - Lifetime US1423145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US488648A US1423145A (en) 1921-07-30 1921-07-30 Furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US488648A US1423145A (en) 1921-07-30 1921-07-30 Furnace

Publications (1)

Publication Number Publication Date
US1423145A true US1423145A (en) 1922-07-18

Family

ID=23940550

Family Applications (1)

Application Number Title Priority Date Filing Date
US488648A Expired - Lifetime US1423145A (en) 1921-07-30 1921-07-30 Furnace

Country Status (1)

Country Link
US (1) US1423145A (en)

Similar Documents

Publication Publication Date Title
US2220414A (en) Combined heating and cooking stove
US2299901A (en) Hot air furnace
US1383506A (en) Heater attachment for grates and stoves
US1423145A (en) Furnace
US925570A (en) Hot-air forming and feeding device for heating apparatus.
US2006849A (en) Furnace
US2038123A (en) Boiler
US767738A (en) Heating stove or furnace.
US1319654A (en) Air heating furnace
US1983843A (en) Combined furnace and domestic hot water heating apparatus
US1911985A (en) Warm air furnace
US605517A (en) Hot-air furnace
US610795A (en) Stove
US1547316A (en) Hot-air furnace
US397174A (en) durham
US782976A (en) Water-heater.
USRE15372E (en) Hot-air
US2155968A (en) Furnace or the like
US1326534A (en) Air-heating apparatus.
US727091A (en) Heater.
US906269A (en) Boiler-furnace.
US605240A (en) Furnace
US230837A (en) trefren
US1726527A (en) Heating apparatus
US888034A (en) Bake-oven.