US795194A - Furnace. - Google Patents

Description

PATENTED JULY 18, 1905.

W. H. CHAPPELL.

I FURNACE.

APPLIOATION FILED MAY 2, 1904.

P 2 SHEETS-SHEET 1.

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PATENTBD JULY 18, 1905.

W. H. CHAPPELL.

PURNACB.

APPLIouxoN rmzn un 2. 1904.

2 SHEETS-SHEET 2.

UNTTED STATES Patenten July 1s, 1905.

PATENT FURNACE.

SPECIFICATION forming part of Letters Patent No. 795,194, dated July 18, 1905.

Application filed May 2, 1904. Serial No. 206,063-

Beit known that l, IVILLIAM HENRY CHAP- PELL, a citizen of the United States, residing at Morenci, in the county of Lenawee and State of 'Michigan, have invented certain new and useful Improvements in Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements-in hot-air furnaces.

The object of the invention is to provide means whereby the radiation of the heat generated in the furnace may be greatly increased.

Another object is to provide means whereby the furnace may be utilized for burning' -both hard and soft coal.

A further object is to provide a furnace of this character which will be simple in construction, durable, and eflicient, provision being made whereby the same may be readily cleaned out.

lVith these and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be more fully described, and particularly pointed out in the appended claim.

In the accompanying drawings, Figure 1 is a side elevation of a furnace constructed in accordance with the invention. Fig. 2 is a top plan view. Fig. 3 is a vertical longitudinal sectional view through the center of the furnace. Fig. LLis ahorizontal sectional view through the upper horizontal radiator-pipes. Fig. 5 is a similar view taken just above the lire-box and through the attachment for burning soft coal. Fig. 6 is a vertical cross-sectional view on the line 6 6 of Fig. l.

heferring more particularly to the drawings, 1 denotes the body of the furnace, in the lower portion of which is arranged a lire pot or box 2, which may be of the usual or any suitable construction. any suitable shape; but it is here shown as having its walls inclined slightly inward above and below a cent-ral line between the top and bottom of the same, said walls being preferably corrugated, as shown.

The body 1 may be of Below the body l and sujporting the same is a base 3, which forms an ash-pit, the front end of which is open andcommunicates with a doorway Ar, formed in a front plate 5. Said doorway is provided with a door 6.` In the front wall of the body l is also formed a feed- Opening which communicates with a doorway 7, also formed in said front plate and closed by a door 8.

On the rear of the base 3 is arranged an eX- tension which forms a smoke-box 9, and in the dividing-wall between said smoke-box and the ash-pit in said base is formed an opening 10, which is normally kept closed by a door 12. The opening 10 is for the purpose of cleaning out the smoke-box.

In the top wall of the body 1 is formed a flue-opening 13, which is in communication with a horizontally-disposed drum or pipe 14, closed at its rear end and opening at its forward end into the forward cross-pipe l5 of a horizontally disposed rectangular] y shaped radiator 16. The outer ends of the pipe l5 are in communication with the rearwardlyextending side pipes 17 of the radiator.

The rear ends of the pipes 17 are connected by and communicate with the rear cross-pipe 19 of said radiator. On the rear side of the pipe 19, midway between the ends ofthe same, is arranged a rearwardly-projecting section of pipe 20, which is adapted to communicate with the smoke-pipe or chimney-flue. (Not shown.) In the pipe 2O at its junction with the pipe 19 is arranged a damper 2l, the stem of which projects upwardly through the pipe 20 and has formed thereon a crank 22, with which is connected the inner end of a forwardly-projecting operating-rod 23, the outer end of which passes through the front plate 5 and has formed thereon a handle 24, by which said damper 21 may be opened and closed.

In'the lower side of the rear cross-'pipe 19 are formed two openings 24', with which are connected the upper ends of two verticallydisposed parallel radiator-pipes 25, the lower ends of which communicate with the smokebox 9 through openings 26 in the top wall of the same.

In the lower side of the section of pipe 2() is formed an opening 27, with which is con- IOO end of a vertically-disposed pipe 28, forming an indirect flue, the lower end of which is in communication with an opening .29 in the top wall of the smoke-box 9.

vWhen starting a fire in this furnace, the damper 21 is opened and the smoke and products of combustion pass upwardly through the flue-opening 13, thence forwardly through the pipe la and into the Vforward cross-pipe 15 of the radiator. From this pipe the smoke and gases pass rearwardly through the side pipes 17 to the rear cross-pipe i9 and from thence directly out through the pipe 2O to the chimney. After the fire is burning the damper 21 is closed, which will cause the smoke and products of combustion to pass downwardly through the two radiator-rapes Q5 and into the smoke-box and from thence upwardly through the indirect flue 28 into the pipe 2() and to the chimney. By this indirect course the heat from said products of combustion is radiated by the pipes of the horizontal radiator 16 and by the vertical radiator- pipes 25 and 28. The arrangement of the door 1Q in the dividing-all between the smoke-box and ash-pit permits said box to be quickly and easily cleaned out from the front of the stove.

In order that the furnace may be utilized forthe burning of soft coal, a hot-air-draft device or attachment is provided, which consist-s of an open frame the sides of which are formed of hollow sections 30, which may be of any suitable shape in cross-section and which are here shown as flat rectangular pipes. The Aframe may be of any suitable shape to lit within the furnace to which it is to be applied, said frame being here shown as being' substantially square, front, rear, and side sections or pieces being joined at their ends by suitable dovetail connections 31,30 that when said sections or pieces are joined together a continuous passage will be Yformed through the same. ln the inner sides of these sections are 'formed discharge-opcnings 32, through which air is discharged. W'hen it is desired to use the furnace for the burning of soft coal, the sections of the frame 30 are-inserted through the feededoor of the furnace and are connected together after being' inserted. When assembled in the furnace, the frame is adapted to rest on the upper edge of the fire pot or box on the level of the lower portion of the feeddoor. The front section of the frame is exnected the upper tended forwardly and is formed with an opening 33, which 1s arranged adjacent to and is opened and closed by a slide-damper 34 in the feed-door of the furnace.

When the damper 3e is opened, air will be drawn in through the opening in the front section of the frame and through the passage formed by the other sections, where itis heated, and from which it is discharged through the openings 32 into the smoke ant gas arising from the soft coal in the lirepot, causing said smoke and gas to burn, thereby increasing the heat generated by the same and enabling the furnace to produce as much heat as when burning hard coal.

By forming the airsuppl ying attachn'ient in sections, hereinlxifore described, the same may be readily inserted or removed tln'ough the feeddoor to change the furnace from a hard to a soft coal luirner, or vice versa.

From the foregoing description, taken in connection with the accompanying drawii'igs, the constructioii and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the prin ciple or sacrificing any of the advantages of this invention.

Having thus described my invention, what l claim as new, and desire to secure by Letters Patent, is-W In a furnace of the character described, comprising a rectangular casing, a tapering lire-pot, and an oppositely-tapered body portion` the herein-described detachable hot-air device consisting of straight sections having dovetail joints at the ends of the sections, said sections being' rectangular in ciosssection, provided with air-openings in their inner walls, the outer wall of the Vfront section eX- tending out to conform to the front of the furnace, said sections forming a rectangular i frame to lit the lire-pot and provided with a sliding' front door or damper in the extended portion, and said sections being removable from and replaceable within the fire-pot, for the purpose described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

Writnesses:

M. V. PALMER, J. N. CuArruLL.

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