US18002A - Improvement in hot-air furnaces - Google Patents

Description

D. P. WEEKS.

Hot Air Furnace.

Patented Aug. 11, 185 7.

N. PETERS. whomumo n her. wnmngn o. c.

UNITED STATES PATENT QEEICE.

DANIEL P. WEEKS, OF BOSTON, ASSIGNOR TO HIMSELF AND EBEN SEAVEY,

OF CHARLESTOWV IMPROVEMENT IN HOT-A l R FU RNAC ES.

Specification forming part of Letters Patent No. l 8,002, dated August 11, 1857.

To all whom it may concern:

Be it known that I, DANIEL P. WEEKS, of

Boston, in the county of Suffolk and State of,

Massachusetts, have invented an Improved Hot-Air Furnace for W'armin g Buildings; and I do hereby declare that the same is fully described and represented in the following horizontcl section taken through the lire-pot,

Fig. 5, a horizontal section taken through the bases of the tapering discharge flues or pipes; Fig. 6, a horizontal section of the parachute radiator, to be hereinafter described. Fig. 7 is a top view of the grate and its sliding frame as removed from the upper part of the ashpit. Fig. Sis a side elevation of the furnace.

In such drawings, 0 denotes the fire pot or place for containing the fuel, the same having a grate I and an ash pit or box G, arranged beneath it, as shown in the drawings. Above the fire-pot G is a flame-chamber H, whose sides flare outward as they rise upward and are formed with corrugations a a a and b b 1), arranged as shown in Fig. 5. The part H has a fuel-supply throat K, provided with a door L. Each of the corrugations b is arrangedbetween two of the corrugations a a, and the whole is covered by a dome M, which is formed with corresponding corrugations c 0, extending upward from and opening out of the corrugations 1) b, respectively.

The corrugations a a open, respectively, into discharge-pipes E E, which communicate with the parachute radiator A, that is arranged between the pipes E E, as shown in Figs. 2 and 3. It is not essential to my invention to have each of the discharge-pipes made either of a tapering form or as a frustum of a cone, as it may have either a cylindrical or prismoidal shape; nor is it essential that the dome M should be in the form of a frustum of a cone, as all these may be varied from such forms and still be adapt-ed to my invention or improvements.

Within the dome M, and extending down into the same and made to surround the parachute-radiator A, as shown in Figs. 2 and 3,

is a hot-air chamber B, which is open at its top and forms, with the dome M, a reverberating chamber D. The said hot-air chamber B is furnished with a series of air-pipes F F, leading through the flame-chamber H and out of the sides thereof, and so as to convey air into the chamber B and from the space surrounding the fire-pot and flame-chamber. The radiator A, extending through the chamber, opensatitslowerendintotheflame-chamberH. This radiator is furnished with a dischargepipe 61 and a damper c, which are arranged in the middle of its dome or top f. This top f is constructed in the form of an annular or semi-rin g dome, while that part of the radiator which is below it tapers downward in a curved or tunnel form and has its sides corrugated, as shown at g g. The object of so making the radiator A is not only to expose a large amount of surface to the heated volatile products of combustion but also to cause the soot and ashes which may pass up through the pipes E E to strike against the annular dome f and be reverberated toward the middle of the radiator, and so as to be discharged by such rathe fire-place or fire within the fire-pot, and so as more effectually to consume the waste carbonaceous matters which might otherwise escapethroughthedischarge-pipedthatis,provided the radiator A should not communicate by the tunnel i with the flame-space H. The lower part of the air-chamber B is made bulbshaped, as shown at 70, the same being for the purpose not only of increasing the amount of heat-absorbing surface of the chamber B, but to prevent to a considerable extent, if not entirely, the volatile products of combustion which may be reverberated within the chamber B from passing downward and into the lower end of the tunnel i, the part 70 serving to direct or deflect such reverberated currents into the pipes E E.

The fire-pot O is surrounded by a series of curved plates N N,.which project from it at their vertical edges so as to form air-spaces O 0 between the fire-pot and such plates as shown in the drawings. Each of these airspaces should be open at top and bottom, so as to allow the air to freely pass up through them and be heated by contact with the outer surface of the fire-pot and inner surface of diator or the tunnel 2' or lower-part thereof into its plate. Each plate N may be furnished with a wing or plate P, extending from it horizontally. \Vhile this wing aids in causing air to pass through the spaces 0 0, it absorbs heat from its plate N, and radiates such into the surrounding atmosphere.

Leading from the ash-box G upward'and directly into one of the discharge-pipes E is a pipe R, furnished with a damper S, such pipe being for thepurpose of carrying off the lighter dust and ashes which may fall into the ash-pit while the grate is being shaken. Consequently the pipe R serves to prevent such lighter ashes or dust from escaping into the room in which the furnace may be situated.

The grate I is provided with a handle m, and turns horizontally on a journal m, extending upward from a rocker-shaft n, so applied to the ash-box or a frame 0 (placed therein) as to be capable of being turned laterally so as to allow the grate to be moved from a horizontal into a vertical position, in order to cause the fuel or contents of the fire-pot to be discharged into the ash-box when occasion may require. When the grate is in a horizontal position it rests on a stud p, projecting from the frame 0, and when the grate is so situated, a person, by taking hold of its handle, may turn the grate back and forward or with a reciprocating motion, in order to discharge ashes from the fuel. Thus the entire grate can have two movements imparted to it, one of which is in a horizontal and the other in a vertical direction. The frame 0, by which the grate is supported, slides into the upper part of the ash-pit on rails or ways, arranged as shown at r r in Figs. 2 and 3.

The furnace so formed may be constructed of iron or other suitable material, and when used should be placed within an air-chamber bases into the same; nor do I claim combining and arranging with a fire-pot and such a series of pipes a conical or tapering radiator closed at its top and placed within the series and directly over the fire and so as to receive the volatile products of combustion from the fuel and deflect them outwardly toward and into the mouths of the several dischargepipes; nor do I claim an annular radiator; nor do I claim conical or frusto-conical bases or semi-cones combined with the fire-pot and its series of tapering discharge pipes and serving to support and open into said pipes, respectively, as I am aware that much if not all of such is .used in the furnace of Gardner Chilson, and claimed by him in his patent, dated September 26, 1854; but

I claim certain improvements in hot-air furnaces, as follows:

1. The combination and arrangement of the parachute radiator A, air-chamber B, and pipes F F, with the fire-chamber O, and the reverberating chamber D, having smoke passages or pipes E, applied to the same and leading into the radiator A, as described.

2. So combining the grate with the fire-pot that the former may not only be-bodily tilted laterally, but rotated horizontally, in manner and for the purposes substantially as set forth.

3. The manner of constructing the radiator A-viz., with a tapering tunnel i, an annular deflecting-dome anda discharge passage or pipe (7 arranged together substantially as specified.

4. Constructing the air-chamber 3 with a bulb or projecting part it, when such chamber is arranged within a revel-berating chamber D, made to communicate with the discharge pipes E E and a chamber of combustion and to surround the radiator A, opening at its lower end into the said chamber of combustion, essentially as set forth.

In testimony whereof I have hereunto set my signature this 21st day of May, 1857.

D. P. WEEKS. \Vitnesses:

R. H. EDDY, F. P. IIALE, Jr.

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