US724058A - Smoke-consuming furnace. - Google Patents

Description

No. 724,058.' PATENTED MAR. s1, 1903.

J. 0. SMITH. SMOKE GONSUMING PURNAGE.

APPLICATION FILED APR. 22, 1902.

N0' MODEL.

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JOHN o. sMf'rH, oFiDEsMoINEsIowA.

SNlOKE-CONSUMING FURNACE.

SPEIFIDCATION forming partici' Letters Patent N o. 724,058, dated March 31, 1903. Appumi'on inea April z2; 19oa serial No. 104,231.' (No model.)

The object of my invention is to provide simple, durable, and inexpensive means to be applied to ordinary boiler-furnaces where two,

or more are arranged adjacent to each other, whereby the operator may readily, quickly, and easily direct the products of combustion from one furnace to pass over the fire in an adjacent furnace, to the end that the volatile gases and black smoke usually generated in large quantities when the operator is placing fuel on one furnace may pass overthe fire of the adjacent furnace and be wholly consumed,

thereby utilizing all the valuable products of Y combustion in heating one or the other of the boilers and preventing the escape of volatile and black smoke from the furnace, all of ,which may be accomplished without interfering with the operation of the furnaces or require skilled service in firing. Y

My invention consists in certain details in the construction, arrangement, and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure 1 shows a front elevation of two boiler-furnaces arranged side-by side, one showing furnace-front and the other shown in vertical transverse section a short distance in the rear of the furnace-front; and Fig. 2 shows a vertical central longitudinal section shown through the indicated line 2 2 of Fig. 1.

Referring to the accompanying drawings, I have used the reference-numeral 10` to indicate the side wall and top of the furnace, and in the accompanying drawings two complete furnaces are shown'side by side. The -numeral 11 is used to indicate a cast-metal furnace-front having a door 12 leading to the ashpit, a door 13 leading to the lire-box, and a door flues, a smoke-stack 2O communicating with this chamber 19 and provided with the damper-21.; These parts are all of the old construction, and hence further detailed description of them is deemed unnecessary.

In the bottom of the chamber 19 is an opening 22, and located beneath said opening 22 in the rear of thefurnace-front is a passageway 2 3, preferably having metal top, bottom, and sides and extending from the opening2 in one boiler to acorresponding opening in an adjacent boiler, and in cases where a large number of boilers are arranged in series this passage-way is designed to extend throughout the entire series, openings 24 being provided to communicate with each of the openings 22. Mounted beneath each of the openings 24 is a hingedvalve 25,1having a crank-arm 26 connected therewith and proj ectsthrough the furnace-front, a notched rack-bar 27 being placed onY the furnace-front to engage said cran k-arm and hold it in any position in which it may be placed. This valve 25 is so shaped -that when in its open position, as shown in Fig. 1, itwill rest upon the bottom of the passage-way 23, Aand thus close the'passage-way 28 to the fire-box, and when moved upwardly it closes the passage-way to the boiler-front. Directly beneath the openings Zet is an opening 28, and ou top of this opening is a slide 29, directed by the handle 30,` projecting through the front of the furnace, so that said opening 28 may, if desired, be closed by said slide. However, lit is to be understoodl that this slide is necessary only in cases vwhere more than one furnace are arranged in series and provided with myimprovements. Where there are only two furnaces, no slides 29 are necessary.

The reference-numeral 31 indicates a chamber-'formed by the wall between the two furnaces, and in this chamber are two passageways 32 and 33, preferably made of sheetmetal pipes, rectangular in cross-section, and leading from the rear of the furnace'where they communicate` with the outside ,atmosphere. The upper one,32 communicates direct through the opening 34 with the passageway 23, and the lower one communicates direct with the air-distributing boxes 35, located beneath the passage-way 23 and having lateral chambers 36 arranged at the front of the furnace and directly below the grate.

These lateral chambers 36 are provided with openings 37 in their rear surfaces, through which the air may be discharged under the grates. In the passage-way is a damper 38, controlled by the rod 39, which extends through the furnace-front. Itis obvious that the side wall oi the furnace will become heated, and thereby produce a current of heated air passing through the pipe 32 under the passage-way 23, mingling with the smoke and gases therein before they are discharged into the furnace to thereby aid combustion, and the air through the pipe is, as above stated, discharged beneath the grates.

In practical use and assuming that two fn rnaces are connected in series and that a re is burning in each and assuming, further, that the opera; ir is about to place fresh fuel on one of the tires, he first closes the damper 2l ofthe furnace to be fired and then opens the valve 25 thereof", and, as above explained, the slide 29 is dispensed with when cases of only two furnaces are connected in series. Obviously7 the product of combustion in the furnace being fired cannot escape through the [lue 20, but will be compelled to pass downwardly through the openings 22 and 24 and then lat-er through thc passage-way 23, where they are com mingled with the heated air delivered by the pipe 32, and they will be finally discharged through the opening 29 into the fire-box of the adjoining furnace, and obviously all of the volatile and'blaclc smoke will be consumed. As soon as theblack smoke and gases from the f u ruace being 'red have passed off the dampers 2l are both opened and the smoke passes through both the flues 20 in the old way.

Having thus described my invention, what I claim, and desire to secure by Letters Patent. of the United States therefor, is-

l. The combination with two or more boiler furnaces, each furnace having an independent irebox, boiler, flue, anda damper in each flue, a passage-way connecting the chamber in front of the boiler-fines with each other, said passage-way having openings in its bot.- toni to communicate with the fire-chambers, a valve in said passage-way capable of closing the openings from the passage-way into the chambers at the ends of the boilers, or of closing the openings leading to the fire-chambers, for the purposes stated.

2. The combination with two or more boilerfurnaces, each furnace having an independent fire-box, boiler, fine, and a damper in each fiile, a passage-way connecting the chamber in front of the boiler-fines with each other, said passage-way having openings in its bottom to communicate with the tire-chambers, a valve in said passage-way capable of closing the openings from the passage-way into the chambers at the ends of the boilers, orof closing the openingsleading to the fire-chambers, and a pipe or chamber in the furnacewalls communicating with the outside atmosphere or discharged into the said passage way, a second smaller pipe or chamber, an air-distributing box communicating therewith and discharging under the grates, and a damper in said second pipe or chamber, substantially, as and for the purposes stated.

JOHN C. SMITH. Witnesses:

REUBEN G. ORWIG, W. R. LANE.

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