US1476932A - Warm-air heating furnace - Google Patents

Description

Dec. 11, 1923.

J.'SYLVAN WARM AIR HEATING FURNACE Filed Jan.

Patented Dec. 11, 1923.

UNITED STATES JOSEPH SYLVAN, OF CICERO, ILLINOIS.

WARM-AIR HEATING FURNACE.

Application led January 30, 1922. Serial No. 532,643.

To all whom t 'may concern:

Be it known that I,A JOSEPH SYLVAN, a citizen of the United States, and a resident of Cicero, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Warm-Air Heating Furnaces; and I do hereby declare that the following is a full, clear, and exact descr1ption thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in warm air heating furnace and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

One of the objects of the present invention is to provide a heating furnace which is so constructed as to eliminate the escape of gas, smoke, or dust from the interior of the combustion chamber, into the air heating space surrounding the same.

Another object of the invention is to so construct the furnace that its interior may be quickly. and readily cleaned, from the outside of the furnace, by a simple and efficient means, the accumulated soot and dust being directed into the firepot to be consumed therein.

These objects of the invention, as well as others, together With the many advantages thereof, will more fully appear' as I proceed with my specification.

In the drawing Figure 1 represents a vertical section through a Warm air heating furnace embodying my invention;

Figure 2 represents a horizontalsection through the furnace, taken on the line 2 2 of Fig. 1.

Figure 3 is a view in elevation of a cleaning device embodied in my improved furnace, and which will be more to later.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawing, 5 indicates as a whole, the combustion chamber and 6 the outer casing which encloses the combustion chamber in such a manner as to provide an air space about the same. As shown herein, the furnace is of the round type as distinguished from the square or rectangular type.

The combustion chamber is made up of a plurality of sections, placed one upon the other, said sections having the usual tongue fully referred' and groove construction at their ends to prevent lateral displacement and to assist in making a good, tight joint between the sections.

7 indicates the ash pit section. This section is made of cast metal and has a hori- Zontal base flange 8 which defines the outside diameter of the furnace, and inwardly and outwardly extending radial top flanges 9 and 10 respectively, of a diameter defining the desired grate bar opening at the top end of said section. The ash pit section has a second opening 11 at its front, for the removal of ashes therefrom, the top of this opening being defined by a horizontal wall section 12. In the flange 9 is provided suitable openings to secure the rear end trunnions of the grate bars 13. The front ends 14 of the grate bars have bearing in clips 15 and 16 secured to the flange 9 and to the horizontal wall section 12 respectively. Each grate bar extension has a gear 17, so that all of the grate bars may be operatively connected together, the middle grate'bar having the usual squared end to receive the crank for rocking said grate bar.

18 indicates the cast metal fire-pot section which rests upon the ashpit section. Said fire-pot section tapers upwardly and outwardly from the bottom end and has a lateral rectangular, tubular extension 19 at its front, arranged in the vertical plane of the ash pit opening 11. This tubular extension provides the fuel opening for the fire pot. Associated with the ash pot section and fire pot section is a front plate 2O which has openings to receive the eXtensions of said sections and finishes off the front of the furnace. This front plate is secured to said extensions by bolt or screws, and carries the ash pit door 21 and the feeddoor 22. Above the feed door, the front plate has an integral water pan 23.

Resting upon the top edge of the fire pot section, is a vheat radiating section 24, preferably made of a plurality of radially arranged parts or segments. As shown herein, the said radiating section is made of two identical parts or halves 25, the ends of which have bolting flanges 26 provided with tongues and grooves to insure proper t between the two parts and prevent undue warping between said parts. Each part 25 of the heat radiating section has top, bottom and intermediate vertically spaced webs 27, 28 and 29 respectively which converge er ,tapervinwardly and upwardly toward the central vertical axis of the combustion chamber as a whole. The webs 28 and 29 are preferably 'integral lwith the fire pot parts and are connected thereto at their outer bottom margins by radially disposed extensions 30 and 31 respectively, which are separated from each other by annular openings 32 and 33 respectively. The web 27 is made integral with web 28 and is connected thereto by semi-cylindric parts 34, struck about :the inner top` end of the'intermediate web 29 as a center. The outer 'marginal part oft-he top'web 27 is connected to the upright wall of the fire pot section but terminates short thereof as shown in Fig. 1'. Thus the webs define a tortuous of zigzag vpath Ior =channel through which the greater part of the products of combustion -rnust pass,` to" direct the heat thereof to the outer wall or shell of the radiating section. i

Resting upon the radiator section is a dome section 35 which converges upwardly andiinwardly, `parallel with the web 27 of the'I radiating Section toterminate in a vertically' disposed, axially arranged tubular extension 3,6, which includes a bearing spider 37, the purpose of which will'appear later. Engaged about` the tubular extension 36 is the elbow end 38 `of la rearwardly extending horizontal smoke conduit 39, the other end yofv which extends through a hole in the louter casing 6 to be connected up with a sheet metal pipe section 40 leading to the chimney. i

Surrounding the fire pot section, radiator section and dome section, but spaced there- `from, is a Sheet metal jacket made up of sections 4l, 42 and i43 which rest' the one -upon'the other, with inter-engaging rabbeted connections, the bottom sheet metal section 41 resting upon the flange' 1 0 of the ash pit section. Said jacket deines a space about the top sections of the combustion chamber which is filled with a heat-'absorbing and retaining material 44, preferably granularfsuch as sand.' This sand also acts to fill or seal such cracks or` crevices asthere'may be between the sections and also such cracks as may develop in'any of said sections, due to expansion and contrae tion(l Italso providesan effective seal against the' escape yofi'gases and 'dust from thel combustion chamber into the air heating space about the saine. i

" 45'indicatesa vcast metal scraper (see Fig. 8)"whicl` is of such shape Vaste extend diametrically across andyfit fin ithe'zig-Zag passageways forrnedv byA the web 28 and V29 of theradiatingsection and that` partof the domeisectin 35 extending' parallel therewith. 'This scraperihasfthe vnotches 4 6, 47 'to clear Asaidwebsfand the; edges of said :scraper substantially?. the .associated surfaces.

The scraper is fixed to the bottom end ol an upright axially disposed shalt 4S, which bears in the spider 37 and extends up through the smoke conduit to bear at its lop end in a bracket 49 fixed to the elbow end ol" said Conduit. A bevel geur 50 is fixed to the top end of said shaft without the bracket and this bevel gear meshes with a .similar gear Y5l on the inner end of a forwardly ex-v tending horizoiital shaft 52. The inner end of the shaft 52 also bears in the bracket il?) and the other end thereof extends through and bears in the front part of the casing wall 6 where it is provided with any suitable. means without the casing for rotating the same, as for instance the hand wheel 53.

The casing 6 cut away at thel Front to fit the front plate 20, and to the lateral margins of which it is attached in any suitable manner, providing a tight joint there 3 between. Said casing has at its` rear, near the bottom end, an air `inlet pipe 54 and in the top wall of said casing are provided flanged openings 55 to receive the warm air conducting pipes 56, shown in dotted lines in Fig. 1.

In operation the greater part of the prod ucts of combustion rising from the lire pot will follow the tortuous path between the webs ofthe radiating section so as to effectively conserve the heat thereof which is taken up by said radiatingsection. This heat is absorbed and retained b v the sand jacket so that its shell or casing becomes heated. Air entering the casing through the pipe 54 becomes heated by contact with the sand jacket shell and rises to pass out through the pipes 56, 56. After the, pro lnets of combustion have passed through the lire dome, they will pass out through the conduit v39 to the chimney. Such unconsumed products of combustion` as soot, will adhere to the webs of the radiating section and when it is so desired, the hand wheel 5?, is given aturn or two so as to rotate the scraper 45 which will scrape the soot from the adjacent parts. This soot will fall back into the hre pot to be again burned. Thus excessive smoking at the chimney or stack is eliminated. No gas or dust can pass through the sand jacket to come into contact with the air being warmed, consequently the warmed air deliveredr t0 the living rooms is clean and free from dust or soot particles. .The sand rjacket will retain the. heat for a long time after the fire has gone out, so that a substantial sa-vingin fuel is accomplished. l `While in describing my invention l have referred to certain details ofvmechanical construction and arrangement of parts, l do not wish to be limited thereto except as pointed out inthe appended claims'.

' I claim as my invention 1. In a warm air heating furnace, the combination' ofa cinnbustion chamber including a fire pot section and a dome section, a casing enclosing the combustion chamber and providing an air space about the same, a sheet metal acket made of sections spaced from but surrounding the combustion chamber and extending from the bottom of the fire pot section to the top of the dome sec tion thereof, where it is open at the top, and a iiller of granular heat absorbing and retaining material in the space between the combustion chamber sections and said sheet metal jacket sections.

2. In a warm air heating furnace, the combination of a combustion chamber made up of-ash pit, fire pot, radiating and do-me sections, resting the one upon another in the order named, the ash pit section including an outwardly extending radial iiange at its top end, a sheet metal jacket made up of bottom intermediate and top sections which are associated with, but spaced from the fire pot, radiating and dome sections of the combustion chamber, the bottom sheet metal jacket section resting on the radial flange of the ash pit section, and a filler of granular, heat absorbing and retaining material between said sheet metal jacket sections and the associated combustion chamber sections.

3. In a warm air heating furnace, in cornbination of a combustion chamber including aiire pot section, a dome section and an intermediate radiating section, said last named section having webs defining Zig-Zag passageways through which the products of combustion must pass, and a device for removing accumulations from the surfaces of said webs, which webs direct the removed accumulations back into the re pot section.

4:. In al warm air heating furnace, the combination of a combustion chamber including a fire pot section, a dome section and an intermediate radiating section, said last named section having webs defining Zig-zag passageways through which the products of combustion must pass, and a cleaning device capable of a rotary movement arranged in said zig-zag passage-Ways for removing accumulations from the surfaces of the webs defining said passageways, which webs direct the removed accumulations back into the fire pot section, and means operable from without the combustion chamber for imparting a rotary movement to said cleaning device.

5. In a warm air heating furnace, the combination of a combustion chamber including a fire pot section, a dome section and an intermediate radiating section, the said last named section being made up of a plurality of parts, each having webs defining zig-zag passageways through which the products of combustion must pass, and a cleaning` blade in said passageways and capable of being rotated from without the combusticn chamber for removing accumulations from said webs which direct the removed accumulations back into the fire pot section.

6. In a warm air heating furnace, the combination of an outer casing, a combustion chamber in said casing and defining therewith an air heating space, said combustion chamber including a iire pot section, a dome section a-nd an intermediate section, a smoke pipe connected with the dome section and extending horizontally through the casing, the dome section and intermediate section defining a Zig-Zag passageway for the products of combustion, a cleaner blade rotatable in said passageway, an upright shaft to which the blade is attached, a bracket carried by the smoke pipe, in which the top end of the shaft has bearing, and a member extended through the casing, operatively connected to the shaft and `operable from without the casing, for rotating the shaft.

In testimony that I claim the foregoing as my invention, I affix my signature in the pDresence .of two witnesses, this 24th day of ecember, A. D. 1921.

JOSEPH SYLVAN.

Witnesses:

L. RUTH MEHLHoPn, T. I-I. ALFRnDs.

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