US1394508A - Stove - Google Patents

Description

1. w. nu PU-Y.

STOVE.

APPLICATION FILED NOV. 10, 1920.

Patent ed Oct. 18, 1921.

2 SHEETS-SHEET I.

INVE. TOR

EQE.

JOHN W. DU IPUY, OF BEAVER FALLS BOROUGH, PENNSYLVANIA.

STOVE.

Specification of Letters Patent.

Patented (lot. 18, 1821.

Application filed November 10, 1920. Serial No; 423,029.

To all whom it may concern:

Be it known that I, JOHN W. DU PUY, a citizen of the United States, and residing in the borough of Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented or discovered the new, useful, and Improved Stove, of which the following is a specification.

My invention consists in certain new and useful improvements in cooking stoves or ranges, and while the same is more particularly intended to be applied to combination stoves in which both solid and fluid fuel may be used, it may also be advantageously applied to a solid or to a fluid fuel stove.

In combination stoves 'difiiculty has been experienced in properly and uniformly heatin the oven throughout.

n my present invention I show a novel flue arrangement wherein a uniform and satisfactory heating of the bottom, top and sides of the oven is provided for when either solid or fluid, either liquid or gaseous, fuel is used.

I have also produced a combination stove provided with but a single damper by the manipulation of which the stove may be instantly changed from one fuel to the other without the removal or substitution of any parts.

Other novel features of construction and arrangement will appear from the following description.

In the accompanying drawings, which are however merely intended to show a practical embodiment of the principles of my invention without limiting the scope of the latter to the construction shown, Figure 1 is a perspective of a stove embodying the principles of my invention, the front and top thereof being partially broken away; Fig. 2 is a vertical cross section of the same; Fig. 3 is an end view looking toward the right in Fig. 1; Fig. at is a sectional view taken along the lineIV-IV in Fig. 2; Fig. 5 is a rear end view of the top flue plate; 6 is a plan view of the same,'and Fig. 7 is a perspective of the burner. Fig. 8 is a horizontal section along the line VIII-VIII in Fig. 2 with the top flue plate omitted.

A is the oven inclosed by tight walls on all sides except the front which is provided with a door 1 suitably hinged in place. B is the firebox for coal or other solidfuels, and shown positioned to the left of the oven A while to the right of said oven is the gas burner box C.

If desired the positions of the fire box and the gas burner box may be reversed, but as the fire box is usually placed at the left of the oven in a coal stove, I have adopted this arrangement for the sake of illustration. Also, for the purposes of convenient descrlption I term the vertical flue interposed between the oven and the fire box the left flue and that on the opposite side of the oven the right flue, said terminology being usedfor purposes of identification but not to indicate their exact or invariable locations relative to the oven.

2 is a suitable grate in the fire box B, and beneath said fire box is the usual ash pit. 3 and 4 represent doors in the front wall of the stove for access to the fire box and ash pit.

Referring now to the exterior walls of the stove, 5 is. the back wall, 6 and 7 its end walls, 8 the bottom, and 9 the front wall which surrounds the oven door. D is the top plate of the stove covering the fire box, the oven and the gas burner box, and apertured to receive the usual stove lids 10. The stove may be supported by the usual legs 11 and be provided with suitable trim 12.

In the drawings the oven is shown cast integral with the back wall 5 but of course it may be a distinct element secured in place.

13 is a vertical partition wall extending from back to front of the stove and from the bottom up to substantially the level of the top of the oven. Said partition forms the inner wall of the fire box and ash pit, and 14 is the renewable fire back protecting the same in the fire box.

Said partition is spaced from the oven A to form the vertical left flue 15 whose lower end connects with'the bottom flue 16 formed by the bottom of the stove and the bottom of the oven. The other end of the bottom flue 16 connects'with the lower end of the vertical right flue 17 whose upper end is stepped in over the oven, as shown at 17* in Fig. 1 to give clearance for the end of the gas burner box C.

18 is a sunken seat in the floor of the flue 16 adjacent to the flue 15, and in which is mounted the oven gas burner E provided with rows of perforations 19 on either side. Said burner is provided with a gas supply pipe 20. 21 is a lid for said seat adapted r as who used for throwing the lid. In Fig,

to close in and protect said burner E when coal is used as the fuel for heating the oven. Said lid is secured on a pivot shaft 22 whose endsare journaled in the walls of the stove and whose front end protrudes so 1 the lid is shown thrown back to expose .the burner for lighting.

F is the top flue plate having its ends sharply inclined downwardly to engage the top'ofthe partition 13 and the top of oven A to the left of the upper end of the flue 17. Thus a lowertop flue 23 is formed be tween the plate F and the top of the oven, with which flue the left flue 15 communicates. Also an upper top flue 24, between said plate F and the top plate 1) is formed, with which flue the upper end of the right flue 17 communicates. Also the fire box B communicates with the upper top flue 24 over the top of the partition 13 and the in clinedend'of the plate F.

G represents an exit flue box, with an open front, which is riveted or bolted against the rear wall 5 of the stove. The lower end of said'box is curved into the wall of the stove toiclose the flue, while its upper end is extended rearwardly and provided with an integral collar 25 for the attachment ofthe stove pipe.

, 26 is a'port through the back wall 5 connecting the bottom flue 16 with the interior of box G.

The upper end of theflue box G is pro= videdwith an integral throat box 27 which fits into an opening in the back wall 5 thus connecting the lower and upper top flues 23 and '24with the interior of the box G. The rear edge of the plate F adjacent to the throat 27 is flared upwardly, as at 28 to enlarge the escape passage of the flue 23.

The upper surface of the plate F is preferably cross ribbed as at 29 to increase the radiating surface of the plate and to strengthen it. J

H is the damper mounted on a pivot shaft 30 horizontally journaled in the box G below the flue exit 27. The end of shaft 30 protrudes from the box and is provided with a handle for. swinging the damper. When the damper is in its horizontal position, shown in Figs. 2 and 4, with its free edge resting on the ledge 31 and its offset tail underthe bottom bar 32 of the throat box, the lower end of the box G is closed, in eifect sealing the port 26, while the fines 23 and 24 are in communication with the escape or stove. pipe. When the damper is turned up against the throat box 27, in a forward and upwardly inclined position, then the flues 23 and 24 are shut off from the smoke pipe but the products of combustion escape freely from. the bottom flue 16 through the port 26.

33 is a port in the wall 5 connecting the rear interior of the gas burner box C to the throat 27, and 34 is a slide valve. controlling said port, so that when the top gas burners are in use the fumes may escape to the stove pipe.

It will be noticed that the bottom flue is of greater capacity than the flues 15 and 17;

that flue 17 is of greater capacity than flue the damper H isthrown into the position shown in Figs. 2 and 4, the lid 21. is turned back, as shown in Fig. 1, and the oven burner E is lighted. The products of combustion will fill the bottom flue 16 and pass up on either side of the oven through the flues 15 and 17, the fumesfrom the flue 15 will pass over the top of the oven through the lower top-flue 23and escapethrough the throat 27, and the fumes from the flue 17 will pass into the uppertopflue 24 and escape through the. throat 27; It is evident that the oven is thoroughly and uniformly heated atthe bottom, sides-and top.

For the sake of illustrationl have shown the. course of the heat currents from the burner E by means of long arrows in Fig. 1.

If desired while the .burner Ev is in use, a coal or other. solid fuel fire may be maintained in the fire box B, the products of com bustion passing into the upper top flue 24 to the open throat 27.

When solid fuel is used to heat the oven, the damper H is turnedv up to close the throat 27, and-the lid 21 is turned down over the burner E to protect'it from soot. The products ofcombustion now travel, as shown. by theshort arrows in Fig. 1, from the fire box B through the upper top flue 24 to. the flue 17and down the same'to the bottom flue ,16 whence they escape through the port 26 to thebox G. and thence to the stove pipe. The heat from the fire box B radiates through the fire back 14 and the partition 13,

and across-the. flue 15'to the left wall of the fire box and the oven prevents over heating ofthe adjacent portions of the oven, a characteristic fault of combination stoves unprovided with suchv av flue. 'Likewise the overheating of the top of the oven by the 7 heat escaping directly from the fire box.

It is evident from the foregoing that my improved combination stove fulfils'every requirement of two stoves, one for fluid and one for solid fuel. \Vith either fuel an even and uniform circulation of heat is maintained about the oven insuring successful anduniform baking. The stove may be changed from one fuel to the other in a moment or both characters of fuel may be used at once; a great advantage where a partial gas failure is occurring.

I have described gas as the fluid fuel used but it is perfectly evident that oil or any other kind of fluid fuel may be substituted, a proper burner for the same being installed in place of the oven gas burner E.

It will be understood that my oven flue construction can also be advantageously applied to stoves adapted exclusively to the use of gaseous or liquid fuel.

Although, for the sake of clearness in describing the embodiment of the principles of my invention illustrated in the drawings, I have minutely described the same, I do not intend to limit myself thereby, but claim broadly- 1. In a cooking stove, the combination of an oven, a bottom flue beneath said oven and into' which the products of fuel combustion are discharged, a vertical flue at each side of said oven connected at their lower ends with the ends of said bottom flue, a pair of top flues above said oven, one of said top flues being directly connected with each of said vertical flues and said top flues being sealed from each other, and a throat box at the rear of said stove directly connected to each of said top flues.

2. In a cooking stove, the combination of an oven, a bottom flue beneath said oven, means for discharging the products of fuel combustion into said bottom flue near one end of the same, a vertical flue at each side of said oven connected at their lower ends with the ends of said bottom flue, the vertical flue nearer the discharge point of said products being of less capacity than the other vertical flue, a pair of top flues above said oven, one of said top flues being clirectly connected with each of said vertical flues and said top flues being sealed from each other, and a throat box at the rear of said stovedirectly connected toeach of said top flues.

3. In a cooking stove, the combination of an oven, a bottom flue beneath said oven, means for discharging the products of fuel combustion into said bottom flue, a vertical flue at each end of said oven, a pair of top flues above said oven, one of said top flues being superimposed on the other and said top flues being sealed from each other, one

of said top flues being directly connected to each of said vertical flues, and a throat box directly connected to each of said top flues.

4. In a cooking stove, the combination of an oven, a bottom flue beneath said oven, means for discharging the products of fuel combustion into said bottom flue at a point nearer one end of the same, a vertical flue at each side of said oven connected to the ends of said bottom flue, the vertical flue nearer the point of discharge of products of combustion being of the lesser capacity, a pair of top flues above said oven, one of said top flues connected to each of said vertical flues and said top flues being superimposed one on the other and sealed from each other, and a throat box directly connected to each of said top flues.

5. In a combination stove for the purposes described, the combination of an oven, a fire box for solid fuel adjacent to said oven, a bottom flue beneath said oven, means for discharging the products of combustion of fluid fuel into said bottom flue, a vertical flue extending upwardly from one end of said bottom fine and interposed between said oven and said fire box, a second vertical fiue extending up from the other end of said bottom flue, a pair of top flues one of which connects with the top of the first named vertical flue while the other top flue connects with the top of said second named vertical flue and also with said fire box, an escape flue connected directly with said bottom flue and with each of said top flues, and damper mechanism for shutting off either said bottom flue or both said top flues from said escape flue.

6. In a combination stove for the purposes described, the combination of an oven, a fire box for solid fuel adjacent to said oven, a bottom flue beneath said oven, means for discharging the products of combustion of fluid fuel into said bottom flue, a vertical flue ex tending upwardly from one end of said bottom flue and interposed between said oven and said fire box, a second vertical flue extending up from the other end of said bottom flue, a pair of top flues, one superimposed on the other, above said oven, the lower top flue being connected to the first named vertical flue while the upper top flue is connected to the other vertical flue and to the fire box, and an escape flue in direct communication with each of said top flues.

7. In a combination stove for the purposes described, the combination of an oven, a fire box for solid fuel adjacent to said oven, a bottom flue beneath said oven, means for discharging the products of combustion of fluid fuel into said bottom flue, a vertical flue extending upwardly from one end of said bottom flue and interposed between said oven and said fire box, a second vertical flue extending up from the other end of said bottom flue, a pair of topflues, one superimposed on the other, above said oven, the lower top flue being connected to the first named vertical flue while the upper top flue is connected to the second named vertical flue and to said fire box, an escape flue connected at the bottom to said bottom flue and at the top to both of said top flues, and damper mechanism for connecting either said bottom flue or both of said top flues to said escape flue.

8. In a combination stove for the purposes described, the combination of an oven, a solid "fuel fire box, a bottom flue beneath said oven, means for discharging the products of combustion of fluid fuel into said bottom flue, a vertical flue communicating with one end of said bottom flue and interposed between said oven and said fire box, a second vertical flue communicating with the other end of said bottom flue and extending up along the other side of said oven, a pair of top flues, above said oven, one of said flues being superimposed on the'other, the lower of said top flues communicating with said first mentioned vertical flue and other of said top flues communicating with said second mentioned vertical flue and also with said fire box, an escape flue in direct communication with said bottom flue and with both of said top flues, and damper mechanism whereby the products of combustion may be discharged either from said bottom flue or from said top fluesinto said escape flue;

9. In a combination stove for the purposes described, the combination of an oven, a fire box for solid fuel adjacent to said oven, a bottom flue beneath said oven, means for discharging the products of 'combustion of fluid fuel into said bottom flue, a vertical flue extending upwardly from one end of said bottom flue and interposed between said oven and said fire box, a second vertical-flue connected to the other end of said bottom flue, a pair of top flues, one superimposed on the other above said oven, the lower top flue being connected to the first named vertical flue and the upper top flue being connected to the second named vertical flue and to the fire-box, an escape flue connected at its bottom to the bottom flue and at its top to both of said top flues, and a damper in said escape flue adapted when in its one position to shut off said bottom flue from and connect rboth of'said top 'flues directly with said escape flue and when in its other position to shut off both ofsaid top flues from' and to connect said bottom flue with said escape flue.

Signed at Pittsburgh, Pa., this 4th day of November, 1920.

JOHN w. DU PUY.

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