US1564256A - Pipeless furnace - Google Patents

Description

H. LECHLEITNER rIPELEss FURNAGE Filed April 14, 1925 3 Sheets-Sheet 1 @not nu,

Dec. 8, 1925.

H. LECHLEITNER PIPELESS FURNACE Filed April 14, 1925 3 Sheets-Sheet 2 Dec. 8,1925. l y

H. LECHLEITNER PIPELESS FURNACE Filed April 14, 1925 5 Sheets-Sheet 5 O v' o o o o o@ Oo g O atto: u1

Patented Deo,

PATENT OFFICE.

HENRY LECHLEITNER, OF AKRON, OHIO.

PIPELESS FURNACE.

Application filed April 14, 1925.

To all whom 'it may concern:

Be it known that I, HENRY LneHLnrrNnn,

a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have i vented certain new and useful improvements in a Fipeless Furnace,

of which the following is specification.

y This invention relates to an improved hot air furnace, and it has particular reference tothe so-called pipeless variety.

lt is my principal aim to generally improve upon furnaces of this class by providing one wherein the air is circulated in a tortuous manner to Contact various heated surfaces and to absorb and carry with it heat for passage through the outlet to the room, whereby to obtain a degree of heat which is more intense than has heretofore been attained with known furnaces of this type.

It is a feature of the invention to incorporate in the structure, at the bottom, a 'pan for containing water and conducting the air over the surface of the water so that the heated air eventually7 escaping into Vthe room is nioistened, and not overly dry, 'as is ordinarily the case with a pipeless fur- ',DlC.v

Another and highly important feature is the central unit surrounded by the main casing, this unit comprising a vertical cylinder in which the fire pot is located, and this cylinder being fashioned to provide the aforesaid water pan, and there being a discular hollow drum carried on the upper end thereof and serving as a means for `superheating the air prior to its escape through the outlet.

Other features of construction and advantages derived therefrom will become apparent from the following description and drawings.

ln the accompanying drawings forming a part of this application, and in which like numerals are employed to designate like parts throughout the same:

Figure l is a view in elevation, and section observing the front of a pipeless fur nace constructed in accordance with the present invention.

Figure 2 is a substantial central vertical section through the same at a right angle to Figure l.

Figure 3 is a horizontal section through the superheator drum, the section being Serial No. 23,016.

taken approximately upon the plane of the line 3 3 of Figure l.

Figure t is a horizontal section taken on the plane of the line fi-l of Figure l.

.Figure 5 is a detail view of a valved cold air vent.

Figure 6 is a bottom plan view of a casting which is confined in the aforesaid drum.

Figure 7 is an enlarged top plan view of a heat absorbing coil carried by said casting.

Considering the central unit of the furnace first, it will be seen that the same comprises a hollow cylindrical shell l, vertically disposed and fashioned at its bottom to provide a water pan 2. At vertically spaced points adjacent its bottom and at its center this shell is formed with relatively large openings from which tubular connectors 3 and 4 extend. In a diametrically opposite point at the top the shell is formed with an opening with which a smoke pipe 5 is connected, there being a hinged section 6 in association with this pipe, and said section being located within the shell l. As before indicated, an air super-heating drum 7 rests upon the top of this shell and is of a diameter slightly less than the complete diameter of the furnace as a whole. The drum preferably comprises an apertured top plate S, a bottom plate 9, and an ntervem'ng annular band 10, thus making a hollow cylindrical drum. The drum is of considerably greater diameter than the cylindrical shell l, and that portion of the bottom plate 9 over the shell is imperforate. Both plates s 8 and 9 however are provided adjacent their peripheries with holes to accommodate short vertical pipes 11 permitting passage of the heated air from the body proper.` Surrounding the shell l in circumferentially spaced relation and communicating with thc air drum 7 are relatively small tubes 19, the same being provided with restricted openings at their bottom as shown in Figure 1. Located in this drum is an iron casting 13 formed with small apertures 14 and upon its under side with open bottom cells l5. Cast steel coils 17 are housed in these cells, and in this connection I would state that the wire from which each coil is formed is eX- tended through an opening in the casting, and is screw threaded for reception of the nuts as shown in Figure 5. The coils are held properly in place in this manner. lt should also be noted that suiiicient clearance is provided between the coils and the cells to permit effective absorbing of the heat by the coils. The casting is connected to the top plate 8 by a bolt or the like 18. Surrounding the shell 1 and the heating drum, is the main casing 19, the saine being formed of sheet material, and being cylindrical in horizontal section. As shown more plainly in Figure l, the ends of the sheet are bent to provide flanges, and these are appropriately secured together. The upper end of the casing terminates on a plane with the top plate of the air drum, and a conical top 2O is fitted thereon, and is provided. with a central hot air discharge neck 21 adapted to communicate with the usual register (not shown). lnterposed between and spaced ,from the shell and the casing is an annular partition 22 dividing the space into passages 23 and 211. It will be observed from Figure 2 that this partition terminates in spaced relation above the water pan. It will also be noted from Figure l that the partition, like the casing, is formed from a single piece of sheet material having its meeting ends anged and bolted together between the flanges on the main casing. lf desired, asbestos may be interposed to provide a heat-tight seam. From Figure 2 it will be seen that the Lipper end of the partition is inclined outwardly as indicated at 25, and is then bent as at 26 and properly fastened to the internal face of the casing. The casing is provided at this point with circuinferentially spaced cold air intakes 27, and the incoming air is deflected downwardly by the inclined portion 25.

The front wall of the casing is provided with a rectangular opening closed by a cast plate 28 riveted or otherwise secured in place, and this plate carries the main door 29 and also an ash pit and draft regulating door 30. Each of these doors includes a hinged closure 31 to which a pull chain is connected, these pull chains being adapted to extend upwardly into the house to be manipulated.

Supported within the shell 1 is a fire pot 32, held in spaced relation above the bottom of the furnace, and this fire pot is provided with a hinged downwardly swinging grate structure 33 of appropriate construction. The grate preferably comprises a hinged section 34 carrying a relatively rotatable valve section 35, the hinged section being provided with a latch 36 for holding it in closed position. Access may be had to the grate through the connector l and bottom door 30.

Directing attention to Figure 5, it will be seen that a row of vent holes 37 is formed in the casing wall. rl`here may be any number of these rows. Surrrnindingthe holes is a channel shaped keeper 38 and an apen tured sliding shutter 39 is mounted in the foregoing description and drawings it will be seen that l have evolved and produced a novel pipeless hot air furd nace wherein the cold air is compelled to take a tortuous passage so that it will be thor-V oughly heated before escaping` from ythe furnace and into the house. Under the arrangement sliown, formation of a vacuum is practically impossible, and for this reason a good draft is assured at all times, and consequently a rapid circulation of air takes place. The air, having affinity for the water, will sweep over the surface of the same and be inoistened on its way through the passages. The superheating drum di-A rectly ovei' the fire pot will be intensely heated, and air entering this will be heated to a very high degree. Likewise, the casting and heat absorbing coils will take up good deal of the heat during the operation of the furnace, and even after the dampers have been closed, and the fire allowed to die down, a goodly amount of heat will nevertheless emerge from the furnace. ln fact, even after the fire is out, the heating drum and heat absorbing elements therein will suffice to radiate heat through the outlet and into the room. Obviously, then the 1practicability of an arrangement of this kind is clear. lnasmuch as the details have been specifically described, it is thought that a clear understanding of the invention will now be had. Therefore, a more lengthy description is thought unnecessary.

Minorchanges coming within the invention claimed may be resorted to if desired.

{aving thus described the invention, what l claim as new and desire to secure by Letters Patent is 1. In a furnace of the class described, a casing, a shell located in said casing, said shell being hollow and disposed vertically, a bottom connected with the lower end ofv the shell, said bottom being fashioned toI provide a water containing pan, an air heating drum at the top of said shell, said drum, shell and pan being a single unit, and a heat absorbing and radiating means located in said drum and comprising a casting einbodying cells in which heat absorbing coils are conned.

2. In a furnace of the class described, a hollow cylindrical vertically disposed shell having a bottom portion fashioned to provide a water containing pan, a hollow circular heating drum resting on top and projecting beyond said shell, said drinn being 0f a diameter substantially equal to the diameter of said water containing pan, a cas ing surra'unding said drinn and pan and spaced from said shell, a head surrounding said casing and disposed above said drum,

'10 lation above said Water pan7 a partition Wall associated at its top with said casing and drum and depending in the space be tween the casing and shell and providing air passages, said partition terminating in spaced relation above said Wat-e1' pan, and heat absorbing and radiating means located in said drum.

In testimony whereof I niy signature.

HENRY LECHLEITNER.

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