US843104A - Hot-air furnace. - Google Patents

Description

PATENTED PEB. 5, 1907.

G. 2P. A. RBLL.

HOT AIR PURNACE. APPLIOTION FILED SEPT. 5, 1905. RENEWED DE01?. 1908.

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1HE Nolems PETER: ca., wAsmNcroN. n. c.

` PATENTED FEB. 5, 1,907.

v C. P. A. RELIJ.V HOT AIR FURNAGE. nrLroA'rxox Hmm snp'r. s, 1905. Bmwnwn Dnc. 1v, 190e.v

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1HE Nunms furnis co.. WASHINGTON. n. c.

TINTTED STATES PATENT OFFICE.

CORNELIS F. A. RELL, OF INDEPENDENCE, MISSOURI, ASSIGNOR TO ROELL MANUFACTURING COMPANY, OF INDEPENDENCE, MISSOURI7 A CORPORATION OF MISSOURI.

HOT-AIR FURNACE.

Specification of Letters Patent.

Patented Feb. 5, 1907.

,To cti/. whom if? may concern:

Be it known that I, CORNELIS F. A. RELL, a citizen of the United States, residing at Independence, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in IIct-Air Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

In the furnace known as base-revertiblc draft I have designed certain novel features of construction the purpose of which is to provide for an eflicient central baseraft for producing a high heat with increased. surface radiation and in which the construction is specially designed for durability and convenience of assembling of the Iire-pot and its supporting and` protecting air-chamber and hre-zone forming parts, and in the claims appended hereto I will point out the parts and combination of parts which constitute my invention, in connection with the accompanying drawings, in which- Figure 1 represents in vertical central section a hot-air furnace embodying my invention. Fig. 2 is a vertical section of the firepot, the grate, and their supporting parts. Fig. 3 is a horizontal section taken on the line a l) of Fig. 1. Fig. 4 is a like section taken on the line c d ofFig. 1.

lVithin an inclosing casing a cylindrical or ring casting 1 forms the ash-pit base, has the usual door 2 for the base-draft, and on this base-ring is seated a ring-plate 3, which is formed with a sunken bottom, on which the grate 4 is supported. and from which the ringwall 5 'l lares upward. The horizontal part of this ring-plate overhangs the base-casting and on its overhanging circular edge G is seated a trough-shaped casting 7, inverted so as to form a chamber S, which opens into the sunken bottom of the ring-plate 3 and forms with it and with the grate the vlire zone 9. Upon the apex of this trough-shaped casting is seated the base edge of a ring 10, which forms a frustum of a cone, and on its upper edge is supported laterally the 'lire-pot 11, the lower end of which terminates on a plane with the open bottom of the inverted trough.

The apex of the inverted-trough casting forms a shouldered seat 12 for the upper conical ring, and this ring, the inner inclined wall 13 of said trough-casting, and theIire-pot together form a chamber 14 around the {ircpot for supplyingair to the -lire zone at the lower edge of the lire-pot. The lire-pot is supported upon the inner edge of the inner inclined wall of the inverted trough, and this edge is quite thick and has perforations 15, through which air from the chamber 14 passes into the fire zone, while spaces 16 may be formed around the upper side of the thick edge on which the fire-pot rests and beneath its edge, through which air from the chamber 14 enters the side of the 'lire-pot, so that these two outlets for the air from the chamber can be used together, the one promoting combustion .in the 'Iire zone, the other promoting combustion within and at the hase ofthe 'fire-pot. The spaces entering the fire-pot, however, may be dispensed with, leaving the perforations opening into the 'lire zone. The air-inlet for the chamber 14 is by register 17 at the front of the casing 1S, which incloses all the parts of the furnace, and the cold air circulating around this chamber and passing into the lire zone serves to protect the lower edge of the trough-wall 13,where the heat is greatest. As this wall 13 supports the lirepot, it is the more important to protect the edge of the wallon which the fire-pot is seated, and the perforations 15 are made around this edge at the bottoni of the air-chamber.

The dome 19 is supported on the top edge of the 'fire-pot, forms the combustion-chamber, has the feed-opening closed by a door 20, and has communication for direct draft with the smoke-pipe 21, which is controlled by a damper 22. From the inverted-trough casting, which forms the 'lire zone, one or more, preferably a pair, of flue-forming pipes 28 descend and open into a horizontal pipeforming flue 24, having the form of a horseshoe partially surrounding the base-casting and from which three flue-forming pipes 25 rise and open into a fluo-forming pipe 26, partially surrounding the dome and which by two short pipes 27 communicate with a like pipe-forming flue 2S, which intersects the horizontal branch 21 of the smoke-pipe between its exit and the damper 22 therein. It is this construction of three horizontal pipe- IOO forming nues-24, 26, and 28, one above the other, having communication with each other and with the smoke-pipe, that provides the revertible draft and the even distribution of the heat within the casing, because i still higher horizontal pipe 28, which intersects the smoke-pipe 2l, and it will be noted that the vertical pipes 25 are disposed equal distances apart with the upper short flues 27 at equal distance on each side of the smolrepipe and all at equal distances from the center of the fire-pot. 29 are openings in the top of the inclosing case, whereby the hot air therefrom may be carried where wanted. rIhe fire-pot and its chamber-forming parts having no fastenings are quickly and conveniently assembled. The single casting of trough shape by being inverted and seated upon the outer edge of the grate-supporting ring-plate forms the fire-Zone chamber, a support for the fire-pot, and a support for the c onical -ring,which, with the fire-pot and the inner wall of the inverted trough, forms the air-chamber around the fire-pot. This inverted-trough casting forms the means of connecting the diving i'lues of the revertible. draft, and the coacting relation of this inverted trough and its connected elements gives economy in the construction and in the assembling of the parts and constitutes a feature of my invention.

It will be understood that the direct draft up through the grate is used in starting the iire and creates a vacuum in the pipes to render the revertible draft effective, because when the damper is closed the draft is compelled to follow the longest way; but the damper being open the draft will follow the shortest way, and hence only one draft at a time is active.

While I have shown the fire-pot, the grate, and the fire zone connected and forming parts assembled with revertible flue-pipe connections in a hot-air furnace, obviously these parts may be assembled in a stove or range in the same relation.

I claiml. In a hot-air furnace, an inclosing casing, a grate, a ring-plate supporting the grate, a trough-ring inverted upon the circumference of said ring-plate and forming a fire-zone chamber, a fire-pot seated upon the inner lower edge of said inverted trough, a conical plate seated upon the apex of said inverted trough and including its inner Wall forming an air-chamber around the fire-pot, and re- The lower pipe 24 revertible flue-pipes connected to' the outer Wall of said inverted trough. Y

2. In a hot-air furnace, an inclosingj casing, a base, a grate, a ring-plate having a sunken center support for the grate, a trough-ring inverted upon the circuirerence of said ring-plate and including the grate forming a fire zone, a re-pot supported upon the inner lower edge of said inverted ring-trough, depending pipes connected to the outer wall of said ring-trough, a base -pipe partially4 surrounding the base and connecting the depending pipes, a plurality of flue-pipes connecting and rising from said base-pipe, and flue-pipes connecting said vertical pipes with the exitpipe.

3. In a hot-air furnace, an inclosing casing, a base, a grate, a ring-plate, supporting the grate, a trough-ring inverted upon said ringplate and forming a fire-Zone chamber, a fire-pot seated upon the inner lower edge of said. inverted trough, a conical plate seated upon the apex of said inverted trough and against the outer wall of the fire-pot and including the inner wall of said inverted trough forming an air-chamber around the :lire-pot, a flue-pipe partially surrounding the base, revertible flue-pipes connecting the base-pipe and the outer wall of said inverted trough, a dome forming the combustion-chamber, a valved exit-pipe connecting the crown of the dome, a flue-pipe artially surrounding the dome, a plurality o flue-pipes connecting the base flue-pipe with the fiue-pipe around the dome, a iiuepipe partially surrounding the crown of the dome and intersecting the exitpipe, and-a pipe connecting each end of said top flue-pipe with each side of the flue-pipe around the dome.

4. In a hot-air furnace including an inclosing casing, a grate, aring-plate supporting the grate, a trough-ring inverted upon the circuinference of said ring-plate and forming a fire-Zone chamber, a fire-pot seated upon the inner lower edge of said inverted trough, a conical plate seated upon the apex of said inverted trough and including its inner wall having perforations around its inner lower edge forming an air-chamber around the firepot, and revertible flue-pipes dependingfrom the outer wall of said inverted trough.

5. In a hot-air furnace, including an inclosing casing, a grate, a ring-plate supporting the grate, a trough-ring inverted upon the circumference of said ring-plate and forming a fire-zone chamber, a fire-pot seated upon the inner lower edge of said inverted troughring, a conical plate seated upon the apex of said inverted trough-ring and including its inner wall forming an air-chamber around the fire-pot, said trough-ring being provided with perforations in the base edge of said inner wall opening into the hre zone and spaces at the seating of the fire-pot upon said wall edge opening into the iire-pot, and

IOO

revertible Hue-pipes depending from the outer wall of said inverted trough-ring.

6. In a hot-air furnace, an inclosing casing, a grate, a irepot, an inverted ring-trough surrounding the base of the iire-pot and including the grate forming the fire zone, revertible flue-pipes depending from the outer wall of said inverted ring-trough, a base flue-pipe connecting the revertible flue-pipes, a deine forming the combustion-chamber, a smoke-pipe connecting the donie and having a direct-draft-controlling damper, and a plurality of vertical and horizontal vflue-pipes connecting the base flue-pipe with the sniokepipe between the controlling-damper of the latter and the exit for the purpose stated.

7. In an air-heating furnace and including an inclosing casing, a grate, a ring-supporting plate therefor, an inverted ring-trough provided with an inward-projecting edge seated upon the circumference of said ring-plate and with it and the grate forming a iire zone, a fire-pot supported upon the inward-projecting edge or' the inverted trough, and revertible flue-pipes depending from the outer wall of said inverted ring-trough.

S. In an air-heat1ng furnace, an inclosing casing, a grate, a ring-supporting plate therefor, an inverted trough-ring 'forming with said plate and the grate, the re Zone, a `lirepot supported upon an inner edge 0l the inverted trough, revertible flue-pipes depending from the outer wall ol said inverted trough, and a ring-plate seated on the top ol Said trough and with its inner wall and outer wall 0l the lire-pot, forming an air-chamber, the bottoni ol said trough at its inner end having perlorations opening into said chainber and into the lire zone and openings leading from said chamber into the iire-pot at its lower edge.

In testimony whereol'- I have signed niy naine to" this specification in the presence ol two subscribing witnesses.

CORNELIS F. A. RELL.

Vitnesses:

W. S. LOAR, A. J. FLETCHER.

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