US2627265A - Air circulating heater and furnace - Google Patents

Description

Feb. 3, 1953 s. D. TATE 2,627,265

AIR CIRCULATING HEATER AND FURNACE Filed May 17, 1949 3 Sheets-Sheet l s R a m a N N m m m N a T 1 TH .N D s m w. m \n s V. B 9 N o FIG.3.

r s. D. TATE AIR CIRCULATING HEATER AND FURNACE Feb. 3, 1953 3 Sheets-Sheet 2 Filed May 17, 1949 h 'lIIIlI'lI/IIIIIIIlIII!IIIIIIIIIIIIIIIIIIIIIIIJ'III'I:

FIG.5.

INVENTOR. Syllus D. Tate 4 e l Anon EYS Feb. 3, 1953 s. m. TATE 2,627,265

' AIR CIRCULATING HEATER lAND FURNACE Filed May 17, 1949 3'Sheets-Sheet 5 INVENTOR. Syllus D. Tote BY ATTORNEYS Patented Feb. 3, 1 953 UNITED STATES PATENT OFFICE AIR. CIRCULATIN G HEATER AND FURNACE Syllus D. Tate, Centralia, Ill.

Application May 17, 1949, Serial No. 93,788

2 Claims.

The present invention relates to improvements in an air circulating heater and furnace and has for an object the provision of a device of this kind in which the air is more effectively heated and better circulated than heretofore.

' Another object of the present invention is to provide an improved heater and furnace in which the air heating chamber or oven is entirely enclosed by the casing which contains the heating unit and the heated air compartment completely encloses the stove or heater containing casing.

A further object of the present invention is to provide an improved structure of this character in which the cool air intake for the oven extends through the heating unit so that the cool air is preheated before it is delivered to the oven.

A still further object of the present invention is to provide an improved heater and furnace in which means are incorporated for retaining the incoming cool air in the lower part of the oven so that it will be subjected directly to the heat from the heating unit for a longer period.

The present invention aims to provide an improved structure of this character in which the oven is fume-tight and air-tight from the heater casing so that the air heating chamber is sealed off from any fumes from the burner.

The present invention also aims to provide an improved heater and furnace in which the gas fumes and the heat from the burner are caused to travel up through the space between the oven walls and the walls of the heater casing through baffles so that these walls will retain the heat for a longer period of time.

The present invention contemplates providing an improved structure of this type in which, means are provided for effecting a forced circulation of the heated air into the rooms to be heated and that a blower is utilized for feeding fresh cool air to the oven chamber.

With the foregoing and other objects in view, the invention will be hereinafter more fully described and more particularly pointed out in the appended claims.

In the drawings, in which the same parts are denoted by the same reference numerals throughout the several views,

Figure l is a perspective view of the improved device constructed in accordance with the present invention and with parts broken away and in section,

Figure 2 is a side elevational view of the same with parts broken away and in section,

Figure 3 is a bottom plan view of the fresh air spreader,

Figure 4 is a sectional view taken on the line 4--4 of Figure 1 and looking in the direction of the arrows,

Figure 5 is a sectional view taken on the line 5-5 of Figure 2 and looking in the direction of the arrows,

Figure 6 is a top plan view of the burner unit with parts broken away,

Figure '7 is a front elevational view of the burner, and

Figure 8 is a perspective view of the improved device with parts broken away showing piping for conducting heated air to remote rooms or the like.

Referring more particularly to the drawings, an outer shell, generally indicated at A, comprises a top H], a bottom II, a front wall 12, a rear wall !3 and side walls 14 and I5. This outer shell is adapted to be supported by legs It on a door or the like of a building so that the bottom H is disposed in vertically spaced relation to the floor. The lower edge portions of the front, back and side walls of the outer shell between the legs I5 are cut away as at H and the front and rear and side edge portions of the bottom II are cut away as at l8 in alignment with the corresponding cut away portions I! to permit air to pass therethrough. The upper portions of the sides Hi and I5 of the shell are provided with perforations l9 and 20 and the top Id of the shell is provided with similar perforations 2|.

A stove or heater containing casing, generally indicated at B, is mounted within the outer shell A and comprises a top 22, a bottom 23, a front wall 24, a rear wall 25 and side walls 26 and 2?. The heater casing is supported within the outer shell by any suitable number of brackets 28 and 29 which may be in the form of angle irons or the like. The vertical leg of each bracket 28 is secured to the inner face of the side wall 14 of the outer shell and its horizontal leg is secured to the bottom 23 or the heater casing by rivets or the like. Similar brackets 28 may be secured to the opposite side wall H: of the outer shell and to the bottom 23 of the heater casing. The brackets 29 may have their vertical legs secured to the inner faces of the side walls I4 and l5, respectively, of the outer shell and the outer face of the top 22 of the heater casing by the rivets or the like. i A

The bottom 23 of the heater casing is provided with perforations 3!) so that the air which passes through the cut away portions i1 and I8 of the outer shell can enter the heater casing to supply the air necessary to supportcombustion. for a stove or heating unit 3|. The heating unit 3| is a somewhat box-like structure and comprises an upper wall 32, a bottom wall 33, side walls 34 and front and back walls 35 and 36, respectively. The heating unit 3| is divided into transversely extending compartments 31 by partitions 38 which extend between and are secured to the side walls 34 and the upper and lower walls 32 and 33. The upper wall 32 is provided with apertures 39.

A pipe 49 is adapted to have one end connected to a suitable source of natural or manufactured gas and its opposite end terminates in two branches, each of which comprises two sections 4| and 42. The sections 4| of each branch are disposed at an angle of the order of fortyfive degrees to the pipe 40 and to the sections 42 which are disposed substantially parallel to the pipe 49. The sections 4| and 42 are provided with burners 43, two of which are received by each compartment 31 by being received through appropriate openings in the lower bottom wall 33. An auxiliary pipe 44 has one end connected to the pipe 49 and its opposite end communicates with a pilot burner 45. Suitable valves 49 and 41 are provided for controlling the supply of gas through the pipes 45 and 44, respectively.

An oven, generally indicated at C, is disposed within the stove or heater containing casing B 1 may be located at any desirable point, but in the present illustration are shown to be substantially centrally disposed. The upper outlet end of the fresh air conduit 54 is received by a suitable opening in the bottom 49 of the oven C so that the fresh air will be delivered to the interior of the oven. This opening in the bottom 49 of the oven may be disposed substantially centrally thereof.

A fresh air spreader, generally indicated at 57, is supported by the bottom 49 of the oven in vertically spaced relation to the outlet end of the conduit 54. The spreader 51 comprises a plate 58 from the under surface of which projects a cone shaped member 59 having facets 60. The apex of the cone is disposed slightly above and substantially centrally of the outlet of the conduit 54. Vanes 6| radiate outwardly from the cone shaped member 59 and have their upper edges attached to the under surface of the plate 58 and their bottom edges attached, as by welding or the like, to the upper surface of the bottom 49 of the oven C. Each vane 6| has two longitudinally curved portions 92 and 63 which are the reverse of each other. Brackets 64 which are similar to brackets 28 and 29 are secured to the inner faces of the side walls 25 and 2'! of the stove or heater containing casing B and to the top and bottom 48 and 49, respectively, of the oven C for supporting the oven within the heater casing B.

Pipes 55 extend through suitable aligned openings in the side walls 25 and 59 and 2'1 and of the heater casing B and oven C, respectively, so that the heated air from the oven C may be conveyed to the spaces between the side walls l4 and 26 and I5 and 21 of the outer shell A and the heater casing B, respectively. The pipes 65 have a tight fit with the openings in the side walls of the heater casing B and the oven C so that no fumes of air may pass therearound. A circulating fan 66 is mounted on the rear wall I3 of the outer shell A and communicates with the space between the outer shell A and the heater casing B by an inlet pipe =61.

A baflle 68, which may be in the form of an elongated strip, has its forward end portion attached as at 69 by welding or the like to the inner face of the front wall 24 of the heater casing B. The baffle 68 extends rearwardly and upwardly at an angle of the order of forty-five degrees to the front wall 24 in the space between the side wall 21 and 5| of the heater casing B and the oven C, respectively. The rear end of the bafile B8 terminates short of the rear wall 25 of the heater casing B and the side edges of the baflle are attached to the inner and outer faces of the side walls 2! and 5|, respectively, as by welding or the like.

A baflle 19 which may be similar in shape and construction to the baflle 68 has its rear edge attached by welding or the like, as indicated at 1|, to the inner face of the rear wall 25 of the heater casing B. The baflle extends forwardly and downwardly at an angle of the order of forty-five degrees to the rear Wall 25 and substantially parallel to the baffle 98. The major portion of the baffie '10 is disposed in spaced apart vertical alignment with the major portion of the bafile 68 and the lower forward end of the bafile l0 terminates short of the front wall 24 of the heater casing B. The side edges of the bafile 10 are attached to the inner and outer faces of the side walls 2'! and 5| of the heater casing B and the oven C, respectively.

Bafiles II and 1'2 which are similar in structure and arrangement to the baflles 68 and T8, respectively, are disposed in the space between the side walls 25 and 59 of the heater casing B and the oven C, respectively.

An escape vent 13 for the fumes from the heating unit 3| extends through suitable openings in the rear walls I 3 and 25 of the outer shell A and the heater casing B. The inner end of the vent I3 communicates with the interior of the casing B and its outer end exhausts to the outside atmosphere.

When the heater or furnace is to be employed for heating room remote from thefurnace, in lieu of the perforations I9, 29 and 2|, the pipes 65 are extended through and outwardly of the side walls l4 and I5 of the outer shell A. The outer extended ends of the pipes 55 are connected to conduits 14 which lead to the room to be heated. A door is disposed in the front wall l2 of the outer shell A.

The heater or furnace may be made of any size suitable for the area to be heated. For example, the unit for a five room house would measure 46 inches in height, 24 inches in width and inches in depth. These are the dimensions for the outside shell A. In this size unit the casing B would be inches in height, 18 inches in width and 16 inches in depth and the measurements for the oven C would be 16 inches in height, 14 inches in width and 12 inches in depth.

The side walls I4 and I5 of the outer shell A are provided with louvres I1.

In the use of the device the blower forces fresh air through the conduit 54 and through its end portion 56 into the lower portion of the oven C against the under surface of the fresh air spreader 51. The fresh air as it passes through the heating unit 3| by means of the portion 56 of the conduit 54 will be preheated to some extent. The incoming fresh air will strike the facets 60 of the cone shaped shaped member 59 and will thereby be directed against the vanes 6 i. The fresh air follows the reverse curvatures 62 and 63 of the vanes 6|. This arrangement causes the air to take a tortuous path so that it is retained for a relatively long period in contact with the bottom 49 of the oven C where it is subjected to the direct heat of the heating unit 3|. The heated air then rises upwardly along the side walls 50 and 5| of the oven C and flows outwardly therefrom through the pipes 65. The pipes 65 deliver the heated air int-o the spaces between the side walls 14 and 26 and i5 and 21 of the outer shell A and heater casing B, respectively. From these spaces the air is forced outwardly through the perforations I9, and 2| by the circulating fan 66.

The fumes from the heating unit 6| will flow upwardly as indicated .by the arrows 16 against the under surface of the baffle 68 and above and below the baflles 69 and I6, respectively. The fumes will then move upwardly around the forward end of the baffle '16 and Will rise to the upper portion of the heater casing 13 and .be discharged from the vent 13. The baffles H and 12 will exert a similar influence upon the fumes coming in contact therewith. With this arrangement a back and forth movement is imparted to the fumes from the heating unit 3! so that the heated fumes are maintained in contact with the side walls of the oven and heater casing for a relatively long period of time. This will materially increase the heating effect of the heating unit 3| upon the air in the oven and the air in the space between the outer shell A and the heater casing B. Air for supporting the combustion of the heating unit 3! flows through the cut away portions I1 and I8 of the outer shell A and through the perforations 36 in the bottom 23 of the heater casing 13 and thence to the heating unit 3|.

It is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

What I claim is:

l. A gas circulating heater and furnace comprising an outer shell having air inlet openings at its lower end, a heater casing mounted within the shell in spaced relation thereto and having air inlet openings in its lower end, an air heating oven mounted within the casing adjacent the upper end thereof and in spaced relation thereto, said oven having a bottom wall formed with an opening, a burner unit disposed within the casing and underlying the bottom of the oven and comprising an enclosed casing including spaced apart upper and lower walls the upper of said walls having burner orifices therethrough, means for supplying fuel to the space between said upper and lower walls, said burner unit walls having vertically aligned openings therethrough, a fresh air inlet duct extending through said shell and casing and having a substantial portion disposed within said heater casing and adjacent to said burner unit, said duct also having a portion extending upwardly through the openings in the walls of the burner unit and communicating with the opening in the bottom Wall of the oven, an air spreader mounted on the bottom of the oven and transversely overlying the opening to cause the air to flow transversely over the bottom of the oven, conduit means conveying heated air currents from the oven to the space between the casing and shell, and means for conducting the heated air currents from the space between the casing and-shell and delivering them outwardly of said shell.

2. The combination of claim 1 wherein said oven is substantially air tight except for its fresh air inlet opening and its heated air conduit means and said conduit means includes tubes disposed transversely between the side walls of the oven and casing and in the space between the oven and casing and said conducting means includes a circulating fan communicating with the space between the casing and shell and said shell having openings in the side walls thereof.

SYLLUS D. TATE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 205,762 Phinney July 9, 1878 241,959 Gard May 24, 1881 305,411 Vose Sept. 16, 1884 335,974 Taylor Feb. 9, 1886 358,432 Converse Mar. 1, 1887 621,665 Heil Mar. 21, 1899 682,190 Haslett Sept. 10, 1901 932,953 Booth Aug. 31, 1909 1,647,315 Scherer Nov. 1, 1927 1,651,668 Burmester Dec. 6, 1927 2,291,232 Juby July 28, 1942 2,302,751 Don Howe Nov. 24, 1942 2,328,030 Richards Aug. 31, 1943 2,389,270 Miller Nov. 20, 1945

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