US392899A - Stove or furnace - Google Patents

Stove or furnace Download PDF


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US392899A US392899DA US392899A US 392899 A US392899 A US 392899A US 392899D A US392899D A US 392899DA US 392899 A US392899 A US 392899A
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    • F24B5/00Combustion-air or flue-gas circulation in or around stoves or ranges
    • F24B5/02Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves
    • F24B5/04Combustion-air or flue-gas circulation in or around stoves or ranges in or around stoves the air or gas passing downwards through the bottom of the stove of fire grate


(No Model.) 4 Sheets-Sheet 1.



No. 392,899. Patented Nov. 18, 1888.

(No Model.) 4 Sheets-Sheet 2.



No. 392,899. Patented Nov. 13,1888.


(No Model.) 9 4 Sheets-Sheet 3. J. S. WILLIAMS.


No. 392,899. Patented NOV.v 13, 1888.

I J6 a 62 Mz z N. FEriRS. Phum-Lnmgnpmr. washington. D C.

4 Sheets-Sheet 4.



(No Model.)

No. 392,899. Patented Nov. 13, 1888.

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SPECIFICATION forming part of Letters Patent No. 392,899, dated November 13, ieee. Application led January 31, 1837.l Serial No. 226,077. (No model?) .To @ZZ whom, imay concern:

Be it known that I, .IAcoB S. WILLIAMs, of

the city of St.ALouis, in the State of Missouri, l

haveinvented certain new and useful Improvements in Stoves and Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, and in which- Figure I is a vertical section of a heatingstove at I I, Fig. II. Fig. II is avertical section at II II, Fig. I. Fig. III is a horizontal seection at III III, Fig. I. Fig. IV is a horizontal section at IV IV, Fig. I. Fig. V is a front view of the register or damper by which the air is admitted to the fire when bituminous coal is used, and Fig. VI is a similar view showing the damper constructed for use on an anthracite-coal stove.' Fig. VII is a modification of the damper shown in Fig. V, and Fig. VIII is a modification of the damper shown in Fig. VI. Fig. IX is a detail vertical section at IX IX, Fig. II. Fig. X shows a water-heating chamber surrounding and extending beneath the fire-pot, the iguresbeing an axial section of the stove. Figs. XI to XIV, inclusive, show the improvements applied to an air-heating furnace. Fig. XI is a vertical section at XI XI, Fig. XII. Fig. XII is a horizontal section at XII XII, Fig. XI. Fig. XIII is a vertical section at XIII XIII, Fig. XIV, except that the drum surrounding the magazine is shown in elevation. Fig. XIV is a horizontal section at XIV XIV, Fig. XIII. Figs. XV and XVI show modifications of the register.

Theinvention will be described in the of the figures.

l is theouter shell of the stove.

2 is the hre-pot, which may be of any suitable construction. rEhe fire-pot is supported on a wall, 3, between which and the outer shell is the downtake 4, through which the products of combustion descend to the basechamber 5.

6 is the chimney communicating with the base-chamber 5.

7 is the ash-pit, and S the ash-pit door.

9 is the magazine for fuel, (the stove being of the class known as base-burners, the combustion taking place at the base of the magazine.) The air supplying the oxygen order for combustion enters through a register or compound damper, a portion entering the ashpit and a portion entering the annular chamber 10, surrounding the magazine. enters the bottom of chamber 1Q and iows upward to holes l1 in the outer Wall, l2, of the chamber, through whichit passes into an outer annular chamber, 13, whose outer wall, 14., extends from the stove-top to the level of the magazine-bottom. The chamber 13 is open or perforated at bottom, so that the air is projected downward upon the burning fuel in the fire-pot, and, having become heated in its passage through the chambers 10 and 13, causes very complete combustion of the combustible gases arising from the iire. The register is constructed so as to apportion the quantity of air entering the stove to meet the exact requirements.

It is evident that, as bituminous coal .contains a larger proportion of volatile combustible matter than anthracite coal, a greater quantity of combustible gases will be burned, if at all, at or above the top of the tire than in the case of anthracite coal, and forthis reason a larger proportion of the air should be supplied at this point than if anthracite coal were used. To make this clear it will be assumed that soft or bituminous coal is used, and that it consists of one-third volatile and two-thirds fixed carbon, (omitting the hydrogen.) It is evident that one-third of the oxygen would be required to consume the volatile and two-thirds to consume the fixed carbon, and-as the volatile matter would be distilled from the fresh coal coming from the magazine or at the top of the lire-pot the oxygen, to consume it, must be supplied at that point. As, also, the combustion of the iixed carbon in the fire-pot can be only incomplete, carbonio oxide, or CO, being produced, an equal quantity of oxygen must be mingled with it at the top of the repot to produce thorough combustion orto oonvert the carbonio oxide into carbonic acid, OOZ.) Thus it will be seen that one-third ofthe oxygen would require to beintroduced beneath the tire-pot and two-thirds above the same. To insure this the register is made with an upper opening or openings, 15, of larger area in the aggregation than the lower opening, 16, the opening or openings 15 communicating with a pipe, 17, leading to the chamber 10,

The air IOO and the opening 16 communicating with apipe, 18, leading to the ash pit or chamber 7. One style of these registers or 'valves is shown in Fig. V, where the openings 15 and 16 in the shell 1 are in the form ol' sectors, each onesixth of a circlc,and where the wings 19 of the damper are of substantially the same size, so that the openings may be closed with the damper. Practicallythere would at all times be some supply of air through the pipe or passage to cause the combustion of the gases arising from the incandescent fuel and from the fuel in contact with it at the lower end of the magazine and to keep the magazine cool. This air may be supplied through an opening, 20, made in one or both of the wings-19, which close the openings 15. rIhe pin 21, on which the damper turns, is fixed in the edge of the diaphragm 22, which separates the passages 17 and 18. In the register or valve shown in Fig. VII the same end is gained by a sliding damper, 19, working in front of the openings 15 and 16, the opening 15'being double the area of 16, so that in all positions of the damper, except when it is closed, the proportion of the openings remains the same, (as it does in the form shown in Fig. V.) rlhe damper 19, Fig. VII, has a small part, 20, removed, which leaves a small opening for the entrance of air inthe passage or pipe 17 when the opening 16 is completely closed.

If hard (or anthracite) coal is used, the

openings or apertures 15 16 may be made of about the same size, as such coal contains but a small amount of volatile carbon; but the sameprovision would be made for keeping the magazine cool and causing the combustion of gases arising from the incandescent fuelnamely, by a small supply of air into the pipe or passage 17 when the register would be otherwise closed.

23 is a direct-draft pipe extending from the chamber 26 to the chimney, and having a damper, 21, which would be closed ordinarily, but would be opened when first starting the iire.

25 is the cover of the magazine.

26 is an annular space between the wall 11 and the shell 1.

In the modification shown in Fig. X there is a circular water-chamber surrounding the iirc-pot and extending beneath it and the ashpit. 27 is the induction water-pipe, and 28 the eduction-pipe from the chamber. In other rcspects the stove is similar to that before dcscribed.

In Figs. XI to XIV the invention is shown applied to an air-heating furnace. The shell 1 of the stove :is surrounded by an outer case, 29, which may be of metal, as shown, or may be of brick or any other suitable material. In thismodiilcation the case 1 does not extend to the top of the magazine, and is made of increased diameter, so that the annular chamber surrounding the fire-pot and ash-pit has sufficient size to receive a circular series of airheating pipes, 30, which are open at the bottom to the atmosphere and at the top to the part of the hot-air chamber 31 between the magazinedrum and the outer case, 29. The outer air also enters thev heating-chamber 31 through opening or openings 32 in the bottom of the chamber 31. l The heated air escapes through the pipes It is evident that the modification of the stove shown in Fig. X might be used in combination with the air-heating chamber 31.

I have described the air-passages leading, respectively, to the bottom and top of the firepot as governed by a single damper or valve, whose movement, while regulating the size of the openings, preserved substantially a like relative proportion between them. It is evident that a full equivalent would be found by supplying the two pipes or openings with separate valves connected together so as to move simultaneously and in a manner to accomplish the same result-namely, for the preservation of the relative proportion in the size of the openings 15 and 16, leading, respectively, to the top and bottom of the lire-pot.

The chief advantage of cooling the magazine at the lower part (by the air entering through the pipe 17) is found when bituminous coal is used, for as long as the magazine is kept below a given temperature the coal does not cling to it in such a way as to prevent the downward feed of thc coal.

In Figs. XV and XVI are shown modifications of the register, there being two distinct register valves or dampers, one governing the opening 15 of the pipe 17 and the other governing the opening 16 of the pipe 18.

In Fig. XV the dampers are made to turn, and are connected by eccentric wrist-pins 34 and a rod, 35, connecting them, so that they turn simultaneously and equally,and the proportional size ofthe openings 15 and 16 is always the samein all positions of the dampers.

In Fig. XVI the dampers are made to slide vertically, and as the upper opening, 15, has a different breadth of the lower opening,16, the proportion between them will be maintained while the dampers are moved to increase or diminish the size of the openings. 35 is the connecting-rod between the two dampers.

I claim as my invention- 1. rlhe combination,in a stove or furnacc,of a fire pot or basket, a chamber above and a chamber b elow said fire-basket, and supply- IIO passages for atmospheric air communicating,

respeetively,with the two chambers, and governed by a single damper or by dampers connected together and having simultaneous movement, substantially as and for the purpose set forth.

2. The combination, in a stove or furnace having a tire-basket, a chamber below and a chamber above the fire-basket, and separate air-supply for each chamber, of a damper appliance governing the air-supply in both pipes simultaneously, substantially as and for the purpose set forth.

3. The combination, in a feeding-magazine for stoves and furnaces, of inner, central,and outer walls, forming in the sides of the magazine two ehambersf-one each side ofthe central Wall or partition-communicating together at top, and the pipe or iiue conducting air to the inner chamber, the inner` chamber closed at bottom except for orifice for entrance of atmospheric air, and the outer chamber communicating at bottom with the fire-chamber, for the purpose set forth.

' 4. The combination, in a stove or furnace, of a feedingmagazine having two chambersone each side of a central wall or partition-` closed at top except for orifices by which they communicate together, the outer chamber open at bottom to the fire-chamber and the inner chamber closed at bottom except for air-supply orifice, and air-pipes discharging respectively into the lower part of the inner magazine-chamber and beneath the fire-pot, and a. valve or connected valves moved simultaneousl y, controllingthe passageof air through the air-pipes, substantially as and for the purpose set forth.

5. The combination ofthe outer shell,l,ofthe stove, Wall 3,forming with the outer shell the downtake 4, the re-pot 2, air-pipes 30, passing through the downtake, magazine 9, inner Wall havings openings in the upper portion, forming an inner air chamber around the magazine closed at the top and at the bottom, an outer wall forming an outer air-chamber around the inner Wall closed at the top and open at the bottom, air-pipes discharging, respectively, above into the inner chamber and beneath the fire-pot, and a valve or connected valves moved simultaneously, controlling the passage of air through the pipes,substantially as described.


In presence of- SAML. KNIGHT, EDW. S. KNIGHT.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836115A (en) * 1988-06-23 1989-06-06 Macarthur Charles E Vertical furnace
US5484524A (en) * 1993-02-01 1996-01-16 Jet, Inc. Wastewater treatment apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836115A (en) * 1988-06-23 1989-06-06 Macarthur Charles E Vertical furnace
US5484524A (en) * 1993-02-01 1996-01-16 Jet, Inc. Wastewater treatment apparatus

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