US172569A - Improvement in double heating-grates - Google Patents

Description

.ZSheets-Sheet1.

E. A. JACKSON.

DOUBLE HEATING-GRAIE.

Ng 17z 569 Patented J'an.25,1876.

N. PETERS. PHOTULI TNOGRAPHER, WASHINGTON. D C.

2 Sheets--Shet 2.

E. JACKSON. DOUBLE HEATING-GRATE.

Patented Jan. 25., 1876.

U rrEn STATES EDWIN A. memory, on NEW YORK, N.

IMPROVEMENT IN DOUBLE HEATING-GRATES.

Specification formingpart of LettersPatent N 0. 172,569, dated January 25, 1876 November 11, 1875.

To all whom it may concern:

Be it known that I, EDWIN A. JACKSON, of the city and county of New York, in the State of New York, have invented certain new and useful Improvements in Double Heating- Grates, of which the following specification is a full, clear, and exact description, reference being had to the accompanying drawings forming part of this specification.

In the drawings, Figure 1 represents afront View of my double heating-grate, with its customary adjuncts, and with the valve S, which admits a free, direct draft up the chimney, partly-drawn forward. Fig. 2 is a vertical section through the line as m, Fig. 1, showing the internal arrangement of the heating apparatus; and Fig. 3 is a horizontal section, looking from the back of the apparatus through the line Y Y, Fig. 2, showing the chamber 0, and the openings T T into the pipes U U.

Like letters refer to like parts in all the views.

The object of my invention is to retain the advantages of radiant heat from an open fire, and also an unobstructed ventilation that an open grate affords, and at the same time arrest and utilize a large percentage of the heat which, with grates of ordinary construction, escapes up the chimney with the products of combustion, and to accomplish this without any return draft, or descending fines, which are very objectionable, especially when the chimney has not a very strong draft.

The invention consists in the peculiar arrangement, in connection with a grate of ordinary construction, of three heating-chain bers of novel construction, through which the air is progressively conducted, (being heated to a higher temperature in the second than in the first, and still more highly heated in the third), from its entrance into the apparatus until its exitinto the apartment to be warmed.

In the drawings, A represents the front casing of the apparatus, having the molding of the configuration shown at B, or any other approved ornamentation thereon. O is the grate, of any approved construction, and detachably placed in position. The apparatus is set in the fire-place with the chamber D resting upon the hearth E. The upperplate application filed of this chamber D is directly under the fire, and constitutes the receptacle for the ashes falling from the grate C; and through the bottom plate is acircular opening, F, to which is connected, by a flange, a five-inch pipe, G, which extendsoutside of the building, for the purpose ofadmittin g fresh air to the apparatus through the chamber D. If, because of the location of the fire-place, it be found inconvenient to admitthe air into the chamber D directly from without the building, it may be admitted from the room in which the grate is situated, through the openings H H in the front of said chamber. These inlets, which should be kept closed when air is admitted through pipe G, are opened. and closed by means of a slide operated by the knob J.

Resting upon the chamber D is the second chamber K, against which the coals in the grate rest, without the intervention of a soapstone or fire-brick lining. The inside shell of this chamber has at its bottom aflange at right angles thereto, which is screwed or bolted to the top of chamber D, as shown at L, and at its top it is likewise secured to the outer shell of the apparatus, as seen at M. Communication between the chamber K, thus constructed, and the lower chamber D, is formed by a series of openings, N. The third chamber, 0, directly over the tire, is preferably of the form shown, and is secured by screws or bolts, as shown at P and Q, to chamber K, at about the inclination shown in the drawing. This chamber 0 is perforated by a series of conically-shaped fines, R, forming within said chamber aseries of conical tubes. When the valve S is entirely closed, the products of combustion mustpass through these openings R.

These conical tubes or openings are made larger at the bottom or inlet than at the top or outlet. so as to present a better surface to the fire beneath, and also not so readily allow the products of combustion to escape before the heat is extracted by the air, which has passed up from the second chamber of the series into the chamber 0, and is circulating around said tubes, previous to its entrance through the openings T T into the pipes UU, which conduct it to the apartment to be warmed. The valve S is loosely pivoted at @5011 end, V, tothe outer casing of the apopenings T T with chamber 0 are the pipes U U, through which the air, after being heated in the chalnberO, is conducted to the apartment to be warmed, making its exit through the ornamental outlets X X at the upper corners of the casing-of the apparatus.

The air-chamber D beneath the grate serves to keep the hearth comparatively cool, so that if there be-wood-work in close proximity to or underneath the fire-place," the same will be in no danger of taking fire. v

The operation of the apparatus is as follows: It being placed in position, as previously explained, with the pipe for the admission of the cool air properly attached at the point F, the valve S is opened or drawn entirely forward, and the. fire kindled in the grate. After the coals have become thoroughly ignited, the valve S is thrown back upon the top W of the chamber 0. The products of combustion have now no other means of escape up the chimney, except through the conical openings R, and while these openings are ample for the purpose designed, they yet, by reason of their peculiar construction, prevent the too rapid escape of the heated gases, and they are thus utilized in heating the tubes within the chamber 0, around which the air,

as admitted from the chamber below, cinculates, and is still more highly heated before making its final exit. The cold air, admitted through pipe G into chamber D, where it is partially heated, rises through openings N N into chamber where it is more highly heated, and is thence conducted into the third' chamber of the series 0, where it circulates around the conical tubes extending through said chamber, and is still more highly heated by the products of combustion passing through the conical openings. The heat, as it is extracted from the air in the chamber 0, passes through the openings T T, and is thence conducted through pipes U U into the apartment to be heated, as before explained. I 1-;

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, is

1. In a fire-place grate, the combination ,of the air-heating chambers D, K, and O, the latter being provided with the series of tubular smoke passages R, substantially as described, for the purpose specified.

2. In combination with the air-heatingcham her 0, having a series of tubular smoke-passages, the pivoted damper S, substantially as and for the purpose specified. 7

3. The combination of the air-heat-in g chamber 0, having the upwardly-contracted smokepassages described,-with the lower chambers D and K and the discharging-passages. U, substantially as and for the purpose described.

EDWIN A. JACKSON.

Witnesses:

J NO. H. HANKrNsoN, HORACE FoaBUsH.

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