US306717A - calyelag-e - Google Patents

Description

(No Model.)

3 Sheets-Sheet 1.

v A'. GALVELAGB & J. M. DODGE.

GAS FURNACE Patented Oct.

WITNESSES.

wdfm QMQM MZ (No Model.) 3 Sheets-Sheet 2. A. H. OALVELA'GB 81; J. M. DODGE.

GAS FURNACE.

No. 306,717. Patented Oct. 21, 1884.

WITNESSES.

(No Model.) 3 SheetsSheet 3. A. H. C'ALVELAGE & J. M. DODGE.

GAS FURNACE. No. 306.717. Patented Oct. 21, 1884.

N. PETERS. Pnuto-Lilhn n lw. Washingicn. D. c.

Nrreo STATES error...

AUGUST I-I. CALVELAGE, OF HAUGHVILLE, AND JAMES M. DODGE, OF INDIANAPOLIS, INDIANA.

GAS-FURNACE.

SPECIFICATIQN forming part of Letters Patent. No. 306,717, dated October 21, 1884.

Application filed October '30, 1883. (No model.)

To all whom it may concern:

Be it known that we, AUGUST H. CALVE- mon, of I-Iaughville, and James M. DODGE, ofIndianapoli s, county of Marion, and State of Indiana, have invented certain new and useful Improvements in Gas-Furnaces, of which the following is a specification.

The object of our said invention is to produce a cokingand heating furnace for various purposes, in which a great degree of economy shallbe coupled with the best results. This object is accomplished by the construct-ion and arrangement of the cokingoven, the firespace, and the gas and air passages, so that the gas from the coking-oven and atmospheric air from an air-passage or air-passages may be combined at or near the point where they enter the combustionchamber, as will be presently described.

Our furnaceis especially adapted to be used with an annealing-furnace in the production of malleable-iron castings, and is illustrated in connection with such a furnace.

eferring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar parts, Figure 1 is a side elevation of a furnace embodying our said invention; Fig. 2, a vertical sectional view thereof looking upwardly from the dotted line .2 in Fig. 3; Fig. 3, a horizontal sectional view looking downwardly from the dotted line 3 y in Fig. 2; Fig. 4, a vertical sectional view looking toward the right from the dotted line :0 00,- Fig. 5, a view corresponding to Fig. 2 of another and some what simpler construction, but which em-l bodies substantially the same general matter; and Fi 6, a front elevation of the form shown by Fig.

I11 said drawings the portions marked A represent the ash-pit; B, the grate-bars; O, the combustiouchamber; D, the coke-oven; E, a combined gas and fuel passage; F, a separate gas-passage; G II, openings through whichair enters the combustion-chamber; and I, an annealing-furnace shown in connection with our improved furnace and as receiving its heat therefrom.

In using our invention the fgel is first placed in the coking-oven D, where it is allowed to remain until coked to a sufficient extent to free the gases or volatile matter contained therein. The gas generated during the process of coking passes into the combustionchamber through the combined gas and fuel passage E, and in the construction shown by- Figs. 1, 2, 3, and 4 through the gas-passage F; being thus, in this construction, distributed by means of the several passages equally to both sides of said chamber, thus producing a more perfect combustion. After the fuel is coked to the desired extent it is pushed along the bottom of the coke-oyen, over onto the grate-bars, and is there consumed. By reason of the flow of gas into the combustion-chamher, a greater supply of atmospheric air is needed to insure a perfect combustion of the fuel than would otherwise be necessary, and we have therefore provided an opening or airpassage, G, to furnish such supply. In the construction shown in Figs. 1, 2, 3, and awe provide a second passage, H, and numerous small inlets, g h, from said two passages, to more equally distribute such supply. These openings GII are adapted to be closed or partlyclosed by the dampers g h. The gas andair passages, as will be seen, reach the com bustion-chamber at or near the same point. and thus a substantially perfect combustion and consequent great economy in the use of fuel is secured, as will be readily understood,

the supply of air being easily regulated by means of the dampers, and the supply of gas by the quantity and method of handling the .fuel. The air is preferably heated before being admitted, and in the form of furnace shown by Figs. 5 and'o this is accomplished by means of the heat from the coking-oven strik-.

ing the under wall of the air-passage, and the radiation of heat through the overhead arch. In the other figures we have. shown no means of accomplishing this result. The products of combustion enter the annealing-furnace I through the fire-ports G, and pass through the same, down the fines 4. under the bottom h, and out through appropriate fines to a smoke-stack. (Not shown.)

Having thus fully described our said invention, What we claim as new, and desire to secure by Letters Patent, is-

1. l'nal'nrnaega eokingovemacombustion 23. The combination, with the C(JlllbllSLlUlh chamber, passages leading from the cokingehamber, of an arch over the same, a cokingehamber into both sides of the combustionoven attheside oi'the chamber,communicating ehamber, and openings for the admission of therewith directly at one side and over the 20 5 air to said passages at their entrance to the arch to the other side, and passages from the combustion chamber, substantially as deend of the arch to convey heat to a heatingseribed, and for the purposes specified. chamber, all relatively arranged substantially 2. In a combined coking and heating fnras shown and described. naee, the coking-oven, eombustioil-chamber, a In witness whereof W0 haveherenntoset our 25 1o passage leading from the oven to theehamber, hands and seals, at Indianapolis, Indiana, this and one or more air-passages controlled by i 27th day of October, A. I). 1813.

dampers arranged as set forth, whereby the AUGUST ll. (JAlNlilnidIl. [L. a] from the oven and the air asit enters JAMES M. DODGE. [11. s] through said airmssages are combined at or In presence of 15 near the point where they enter the eombnsl5. \V. fllluntoni),

tion-ehzmiber, substantially as set forth. Urns. I Tnnnnnn.

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