US1709467A - Furnace or stove structure - Google Patents

Description

April 16, 1929. A. ERICKSON 1,709,467

FURNACE-OR STOVE STRUCTURE 2 Sheets-Sheet l April 16, 1929. A. ERICKSON FURNACE OR STOVE STRUCTURE Filed April 1928 2 Sheets-Sheet Patented Apr. 16, 1929.

-UFNITEDYSVTA' TES PATENT O CE AUGUsrERIcKsoN, or mmmiaronrs, MINNESOTA.

FURNACE on STOVE STRUCTURE.

Application fijledApril 2, 1928 Serial No. 266,589.

, This invention relates to a stove or furnace of the hot air, hot water or steam type, which vide a furnace having a fire pot with a cylindrical chamber thereabove,'having an annular chamber. disposed about said cylindrical chamber, adapted to carry the heated medium of the furnace surrounding said first men-, tioned chamber and extending thereover, said annular chamber having a central opening through the top thereof, an outer chamber being provided about said annular chamber for the passage of the products of combustion.

These and other objects and advantages'of the invention will be fully set" forth in the following description made in connection with the accompanying drawings, in which "like reference characters refer to similar parts throughout the several views and in which Fig. l'is a'central vertical section through a furnace embodying the invention, the same being of the hot air type; a

, Fig. 2 is altopplan view of the device'shown 'Fig. 3 is a central vertical section of a furnace embodying the invention and which is of the hot water or steam type; and

Fig. 4 is a top plan view of the device shown in Fig. 3.

Referring to the drawings, particularly Figs. 1 and 2, a furnace is shown havingthe base plate having a vertical wall or partition 5 extending upwardly adjacent one side thereof, with which connects a horizontal partition 5 The partitions 5* and 5? have a flange 5 which supports a grate member- 6 which maybe of any desired construction, the:

, same in the embodiments of the invention illustrated, being shownias formed of a plate having slots extending thereacross. A fire 0t 7 is supported on partitions 5? and ,5" and 7 18s a forwardly extending chamber 7 a form? ing the char "mi passage therefor, which passagehas t c arging d0Dl 8. H-t'1tl3 front from the base member 5 and at the front pora smoke pipe and will lead to a flueor chimtabs heated.

end. The space between the base 5 and partition 5 forms the ash pit which is provided with an-ash door 9 having a plurality of openings 9 therein, arranged in the are of a or plate 10 thereon carried on a screw shaft 11 having a handle 11*. at-its front end, which screw is threaded into a central boss on the door 9. A shell 12 is supported on the top of the fire pot 7 being received in a channel formed by flanges 7 b on the 'top'of said fire pot, which member 12 has an annular chamber 12 therein having an inwardly extending top portion surroundinga cylindrical upper portion 12 open at its top and bottom. The

an inwardly extending flange 12 to which is bolted the bottom andoutwardly extending flange 13 of the member 13,: which member is in the form of aninverted pot or shell, the same thus'being closed at its top and being illustrated as tapering upwardly slightlytoward its closed end. An outer shell 14 of general cylindrical shape extends upwardly tion of the 'furnacefrom'the top of the fire pot 7, said shell being spaced from the-member 12 to form a chamberthereabout; l The top plate '15 fits over the top of the shell 14 and has a depending flange extending around. the top of said shell The top plate 15 has an upwardly extending flange 15 at one sidesurroundlng an'opening leading therefrom, to which 1s connected the pipe 16 which forms ney. It will be seenlthat saidpipe 16 com .municates with thei'nside of chamber 12.

The member 12 has a plurality of spaced cylindrical 1 openings 12*" I extending therethrough adjacent its bottom, which form passages connecting the space between members 12 'and 13 with the space or chamber-between member '12 and the outer shell 14. Said shell '14 adjacent its bottom and at its rear side has afprojecting flange 14 to which is conair from the space or rooms which are heated. A cylindrical 1nember18 surrounds member 12 and extends substantially to thetop of plate"15,,said memberha'ving a top plate 18 and having a pluralityof outwardly ex tending cylindrical flanges or hubs 18 to which are connected the pipes or conduits 19 which will conduct the hot air he the 0 l1 circle, said door 9 also having a draft door '6 member 12'at its inner and'lower side has nected a .pipe-17 forming a return pipe for the In. operation fuel will be suppliedthrough.

the door 8 and through passage-T to the fire pot 7 being supported on grate Gas shown in Fig. 1. The fuel will be burned in the fire space to be heated will pass into the shell 14 through the pipe 117, thus filling the space surrounding fire pot? and partition The .air Wlll be somewhat heat-ed by engagement with the walls of the fire pot and will pass up about member 12 and through the openings orpassages 12 between members 12 and 13 and thence upwardly through member 12 into member 18'and out through the pipes 19 by which itwillbe carriedto the rooms to be heated. Itwill be seen :that the air will be highly heated as it passes .tothe top of the furnace and out at the pipes 19. Draft can be supplied to the fire in the usual way, by"

regulation of the door and a damper (not shown) w ll be supplied in the pipe 16. It will be seen that the air passing into the furnace through pipe 17 will engage a large area of heated surface as it passes upwardly and through the member 12 so that it is ver a a Y effectively heated and practically all of the heat supplied by the fuel is absorbed.

Referring to Figs. 3 and ,4, a furnace struc ture is shown; 'comprisingthe base plate adjacent one sideof which rises the wall or partition 25' connecting with the horizontal partition 25", said partitions having a circular fian e 25 ada ated to suoaortthe rate b to 26. While this grate may be of any usual and desired form, inthe embodiment of the invention illustratedit is shown as a plate having transverscslots therein. A member 27 is supporfted aipon the partition 25, the same having a substantiallycylindrical portion forming 'thefire pot 27 the same having the parallel walls 27 extending at its forward side to form between them acharging passage 25". Th s passage w ll be closed at its front by a charging door 28 of any suitable construction .and the frontfof the ash pit below the grate 26 will be ,olosed by the ash door 23 having the draft openings 28" therein adapte'd to be controlled bythe plate 28 carried on the screw 28 havingav handle at its The member 27 may have a do uble wallformmg achamber 27 .therea-boutand the same has the top 27 projecting rearwardly as a.

flange. The flange 27 and top 27 are providcd with lugs for positioning a cylindrical casing extending upwardly therefrom and supporting the top '29 of the furnace. A cylindrical casing 30 extends from base plate 25 to the top, 29, the same extending outer end and threaded into the door 28.

upwardly alongside of the members 27 and across the topthercof as shown in Fig. 3,'said member 29 having depending flanges sur rounding the casings 30 and 30. The casing 31 is supported on the "top 27 having a central cylindricalportlon 31 wlth an open bottom disposedcentrally thereof and'over the fire pot 2 7 thus forming an annular chamber 31". The member 31 has the central opening at its top through which extendsa conduit 32 extending through the top 29 and having a flange above said top on which is received a cover plate 33 having a handle 33"" thereon. The member 31 has a boss at one side of its top in which is threaded the stem or hot water outlet pipe 3 1 which extends through the top 29, and said member has a boss at its lower portion receiving the pipe 35 extending outwardly through casings 3O= and 30 which is connected to the pipe 35 cxtending inwardly through casing 30 and secured in .a boss on the rear wall of member 27, pipes 35 and 35 thus forming a passage between chambers 31 and 27. 'Aipipe'36 is threaded into a boss in the lower portion of member 27 which communicates with chamber 27 and extends outwardly through chamber 30, said pipe forming a return pipe for the water returning from the rooms to be heated. Said pipe also has connected thereto another pipe 37 con trolled by a valve 38 which may constitute a feed water pipe. The top 29 has aniupwardly extending boss 29 about whi-ch'extends the smoke pipe 39.

In operation water Wlll be supplied to chambers 27 and 31 through the pipe 37.

Fuel "ill be charged into the fire potthrough passage 2T- and the door 28 as indicated atlO. The products ofcombustion from the fuel will pass upwardly into the portion 31 of member 31 outwardly around the bottom of member 31 and upwardly at the sides thereof between the same and casing 30 the same passingout at the smoke pipe 39. The heat will be conserved by theinsulating chamber of air between casings SSW and 130. The hot water or steam, as the casemay be, will pass from the upper portion of member 31 out through the pipe 34: to the radiators and will return through the pipe 36 to the lower portion of chamber 27 This water will be heatedby the heat of the fire pot 27 and will pass through the pipes 35 and 35 to the bottom of chamber 31 where it will be furtherv heated by the said products of combustion. The draft can be regulated as usual by the member-30. It will be secnthat owing to the shape of member 31 that the heated products of combustion will bear upon allsi des thereof v and that a comparatively narrow body of water is. formed in chamber 31 which can be effectively heated. 'Ifdesired, after the furnace is in operation, fuel, can be charged through the member 32 by removing the cover 33 and fuel can thus be built up to the top of the fire pot 27 and-extending somewhat there'- above. V

From the above description it is seen that applicant has provided a simple and very efii-r cient construction of stove or furnace and one which Wlll have a high degree of eificlency 1n the. use of the fuel. The device is such that it can be built in various sized units, and can be The easily and inexpensively constructed. device has been amply demonstrated in actual practice and found to be very successful and efficient. I

It Will, or course, be understoodthat various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which, generally stated, con-- sists in a device capable of carrying out the objects above set forth, in the novel parts and combinations of parts disclosed and defined in the appended claims.

\Vhat is claimed is 1. A furnace having in combination, a fire pot, a substantially cylindrical chamber open at its bottom and closed at its top,1spaced directly above said fire pot and of substantially the same diameter as said fire pot, an annular chamber having a closed bottom disposedin a horizontal plane substantially at the bottom of said cylindrical chamber, said annular chamber surrounding said cylindrical chamber and extending over the top thereof and adapted to receive the; medium heated and distributed by the furnace, a second annular chamber surrounding said first mentioned annular chamber and communicating at its bottom With said cylindrical chamber to receive the products of combustion, a conduit leading from said second annular chamber to a chim- .ney and. a third annular chamber surrounding said second annular chambcr,;the outer wall of which forms the outer Wall of said furnace, saidthird annular chamber extend- -ing to the bottom of said furnace,'passages leading from said third annular chamber into said first mentloned annular chamber at each side thereof, asubst-antially horizontal plate extending about said fire pot and forming the bottom of said second annular chamber and a plane, the diameter of said member being sub stantially the same as the diameter of said fire pot, an annular chamber surrounding said member, said chamber being closed at its bottom andadapted to receive the medium heated and distributed by the furnace, a casing surrounding said annular chamber and spaced from the Wall thereof and having a top Wall extending over said annular chamber and spaced from the top thereof, said last mentionedcasing forming a passage for the products of combustion about said annular chamberand over the top thereof and a conduit extending into said first mentioned annular chamber through Which said medium is adapted to pass.

In testimonyvvhereof I affix my signature.

AUGUST ERICKSON.

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