US443849A - Hot-air furnace - Google Patents

Description

3 Sheets-Sheet 1.

(No Model.)

H. N. HEMINGWAY.

HOT AIR FURNACE.

No. 443,849. Patented Dec. 30,1890.

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3 Sheets-Sheet 2.

(No Model.)

H. N. HEMINGWAY.

HOT AIR FURNACE.

' Patented Dec. 30, 1890.

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UNITED STATES PATENT OFFICE.

nanny N. lIEMINGWAY, or AUBURN, NEW YORK.

HOT-AIR FURNACE.

SPECIFICATION forming part of Letters Patent No. 443,8d9, dated. December 30, 1890.

Application filed August f1, 1890.

To all whom it may concern.-

Be it known that I, HENRY N. HEMING-WAY, of Auburn, in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Hot-Air Furnaces; and I do hereby 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 pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification. I

My invention relates to an improvement in hot-air furnaces; and it consists in the construction and arrangement of parts, which will be more fully described hereinafter.

The objectof my invention is to produce a hot-air furnace which. is simple and effective, and in which the construction is such that the advantages, conveniences, and results hereinafter described are accomplished.

Figure 1 is a vertical section of a furnace which embodies myinvention. Fig. 2 is a vertical section taken at right angles to Fig. 1. Fig. 3 is a top plan view. Fig. 4 is a side view.

A represents the base, which has its upper end curved outward and upward, as at B, and to the upper edge of this curved portion is secured the lower end of the outer inclosing case or shell 0. Placed within the outer casing, and having its lower end supported upon the base A at the junction of the curved and vertical portions of the base A, is the fire-pot D, in the lower end of which a grate of any desired construction is placed. Supported upon the upper end of this fire-pot are the flue-heads E, which are provided with suitable fianges, in which the ends of the'flues catch, as shown in Fig. 2. These fines are placed, as shown, directly over the fire-pot, and, together with the heads E, form what may be termed the firebox, as the smoke and products of combustion pass between them to the smoke-stack F, which has its lower end fastened to the horizontal plate or head G, which is secured to the upper ends of the heads E and forms the top of the fire-box. The inclosing case 0 extends above the upper end of the tire-box, as shown, and formsa hotair dome H, which is in communication with the hot-air chambers or spaces I, as shown. This casin g, however, is cut away at its rear Serial No. 360,976. (No model.)

top side, as shown at J, Fig. 2, and which cutaway portion extends in beyond the rear ends of the fiues a suitable distance, as shown,and the fire-box head G is provided with a series of openings K, through which access is had for the purpose of cleaning out soot from between the fines. Each opening is provided with a separate cover, so that but one need be opened at a time, and thus avoid the great amount of escape of gas that would occur if a single cover was provided for all of the openings. 1 preferably place each of these openings at a pointwhich will allow access to two of the spaces between the fines, and by means of a brush having a suitably-shaped handle the spaces can be cleaned throughout their entire length.

The firebox, as shown by dotted lines in Fig. 3, is square, and the inclosing case 0 is cut away at its corners, as shown, so that the corners of the fire-box are in contact therewith, which makes the hotair spaces separate from each other, except at their upper and lower ends, which construction causes the air to circulate through the tines. If desired, however, the inclosing case may be made circular in form, in which event the corners of the firebox will be in contact with the casing and the hot-air chambers separate and distinct in the same manner, as here shown, by cutting the corners of the casing away.

For the purpose of causing the air to pass back and forth through the tines as it passes to the dome, a division-plate L is placed above the cold-air'inlet M, which directs the incoming air around the fire-pot. to the front hot air chamber. There are also division or partition plates N placed in the centers of the flues, as shown in Fig. 1, which extend entirely through the fines and have their front ends extending through and closing the front airspace at this point, as shown in Fig. 2. These plates direct the air through the flues to the rear air-chamber, which has no connection at its upper end with the dome by reason of the cut-away portion thereof at J, and the air then passes through the upper fines to the front air-chamber, and from thence to the dome. contracted at their upper-ends, where they connect with the dome. By means of this construction it will be seen that the incoming The side air-chambers are preferably IOC air is first caused to circulate around the firepotand to pass back and forth through the fines before it reaches the dome, which heats the air to a high degree with comparatively little fuel.

Secured to the rear or to one or both sides of the inclosiug case is a coal-magazine I, which has a doorin its upper end and a door Q at its lower end. The lower end of this magazine is inclined, as shown, and communicating therewith is an inclined chute R, which extends across the air-space to thefirepot. Placed in the magazine above the door Q is aslide S, which is inserted in place when it is desired to-open the door Q for any'purpose, and this slide prevents the coal from falling down while the door is open.

Having thus described my invention, I claim- 1. In a hot-air furnace, a base having a central opening and an annular flange extending around the opening, a fire-pot having its lower end close the said central opening, a set of flues above and supported by the upper end of the fire-pot, an inelosing case having its lower end supported upon the outer edge of the annular flange, and an air-inletopening opposite the fire-pot, substantially as shown. 2. In a hot-air furnace, a base, a fire-pot supported thereon, a series of flues above the fire-pot, aninclosing ease separated from the flues to form an air-space at each end of the fines and extending above the fines so as to form a dome, the said dome cut away at one end for the purpose described, the plate L, an air-opening below the plate, and the divisionplates N, whereby the air circulates around the firepot back and forth through the flues and to the dome, combined substantially as shown.

Ina hot-air furnace, a base having an upwardly and outwardly curved upper portion, a fire-pot of smaller diameter supported by the base within the curved portion, a set of fluesabove the fire-pot and supported thereby, heads at each end of the fines for closing the spaces between them, the inelosing case having its lower edge secured to the curved portion, the division-plates L N, and an airiulet opening below the plate L, combined substantially as set forth.

4:. In a hot-air furnace, a base, a fire-pot, an angular fire-box above the firepot, consistin g of fines, and an outer casing which engages only the corners of the fire-box, whereby the space between the casing and the fire-box is divided into separate chambers, combined substantially as specified.

5. In a hot-air furnace, a base, a fire-pot, an angular fire-box above the fire-pot, consistin g of lines having spaces between them, heads therefor which close the spaces, and the division-plates L N, combined substantially as shown.

6. The combination, with a hot-air furnace having an outer casing and a tire-pot therein, of a coal-magazine secured to the outer side thereof, having a door in its lower end, and a transverse slide which extends across the magazine above the door, and a chute which connects with the magazine at one end below the said slide and at the opposite end with the fire-pot, substantially as described.

7. The combination, with a hotair furnace having an outer casing and a fire-pot therein, of a coal-magazine secured to the outer side thereof, having a door in its lower end, a transverse slide which extends across the magazine above the door. a chute which connects at one end with the fire-pot and at its opposite end with the magazine below the said slide, and a second vertical slide which extends across the outer end of the chute, substantially as specified.

In testimony whereof I afiix my signature in presence of two witnesses.

HENRY N. lIEMING\VAY.

\Vitnesses:

A. G. TREAT, GEO. II. MAcoMBER.

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