US279969A - Coal-burning furnace - Google Patents

Description

(NO Mdel.)

A. G. MOORE xv J. W. BAHN.

GOAL BURNING FURNAGE. No. 279,969. Patented June Z6, 1883.

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UNITED STATE-sj PATENT OFFICE.

ARTHUR e. MOORE, or wINToN PLI/ion, AND JOHN w. BAHN, on OINOIN- NATI, OHIO.`

COAL-BURNING FURNAOE.

SPECIFICATION forming part of Letters Patent No. 279,969, dated June 2 6, 1883.

' Application mea January 11,1382. (No model.)

To all whom it may concern.-

Be it known that we, ARTHUR G. MOORE, of Vinton Place, Hamilton county, Ohio, and JOHN Y XV. BAHN, of Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Coal-Burning Furnaces, of which the following is a specification.

Our invention has for its object the economizing of fuel and preventing the production IO of an undue amount of smoke.

Our invention is applicable to all classes of furnaces, whether foirheating purposes or for generating steam; but for purposes of illustration we have shown it as employed in an ordi- I 5 nary heating-furnace.

Referring to the drawings forming part of this specification, Figure l is a perspective view ofthe furnace, part of the outer wall bcing broken out to show the parts within. Fig.

2O 2 is a vertical transverse section through the fire-chamber, looking toward the rear of the furnace. Fig. 3 represents a horizontal section of the furnace, the section being taken a short distance above the grate-bars.

A represents the outer wall of the furnace, which is made of any desired shape. This furnace is provided with the usual fuel-doors, a., and ash-pit doors a. The fire-chamber H is p rovided with the grate-bars D, made of any desired form and supported in the usual I nanner.

At the rear of the fire-chamber is located the bridge or division wall C, extending from bottom to top or roof of the furnace, and completely separating the fire-chamber and ash- 3 5 pit K from the openings or combustion-chamber M, as the case may be, in the rear, except ing for and at the throat or openin g A, through the upper portion of which latter the products of combustion pass. The sides of this throat 4o are formed by the portions c e ofthe bridge-wall.

A wall or equivalent obstruction, E, is placed against the rear face ofthe bridge-wall, extending up to the level of the upper surface of the grate-bars, closing the opening through the bridge-wall below the grate-bars, forming a chamber, G, at the rear of the ash-pit and imme- A diately below the throat A. This chamber G is for the purpose of admitting air to the grate B, and need not necessarily be of the precise form 5o shown, but may, if desired, be in the form of a closed chamber and receive its air-supply from a source other than through the ,ash-pit. The grate-bars are extended back into the openings in the bridge-wall toward the Iear face of the bridge-wall; or separate bars B may be placed in the opening instead of extending the main grate-bars.

Instead of the wall E, as shown in the drawings, the furnace in the rear of the bridge-wall may be filled to a level with the grate-bars; 6o but the small wall E serves the same purpose and is less expensive.

XVe do not conne ourselves to the particular shape of the throat A shown in the drawings, as it may be made of any desired shape without materially interfering with the Operation of our invention. It has been found that a narrow and high throat operates Inore effectively than a wide throat, and we preferably employ the narrow form.

The manner in which our invention, as above described, operates is as follows: Then the fire has been started in the fire-chamber, a draft is created and the smoke passes through the contracted throat A. Air enters the ash-pit 7 5 through the openin gs p rovi ded and passes back to the bridge-wall, where it enters the chainber G, and passes up through the grate B, supplyingthe requisite oxygen to the incandescent fuel resting upon it. As the products of coin- SO bustion from the fire-chamber enter the contracted throat A, the heat is concentrated at this point and a complete combustion takes place as aconsequence.

By the employment of our invention as ab ove 8 5 described the production of an undue amount of smoke is cffectually prevented and a great saving of fuel is effected.

Ve do not oonne ourselves to the employment of one throat A and chamber G at the 9o rear of the fire-chamber, as it will be obvious that more than one may be employed. So, also, the grate B may be in the form of a plate having perforations to allow the passage of air from below, or of any other desired equivalent g 5 construction.

Having thus described our invention and its Inode of operation, what we claim as new and of our invention, and desire to secure by Letters Patent, is as follows:

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ber in rear of the bridge-Wall, a laterally-C011- traeted opening (one or more) in the bridge- Wztll rising from the grate, the extension of the grate to form the bottom of said opening, and 15 the :tir-duet below the extension of the grate.

ARTHUR G. MOORE. JOHN V. BAHN.

Attest:

JOHN J. MoLLoY, E. R. HILL.

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