USRE9492E - Ments - Google Patents

Description

, WILLIAM M1 EIsHEE, 0E

PATENT OFFICE.

CINCINNATI, OHIO, ASSIGNOR, BY MESNE ASSIGN- MENTS, T() Tl-IE AMERICAN BCILER AND FURNACE COMPANY, OF SAME PLAGE.

BOILER-FURNACE.

SPECIFICATION forming part of Reissued Letters Patent No. 9,492, dated December 7, 1880.

Original No. 225,051, dated March 2, 1880. Application for reissue iiled October 27, 1880.

To all whom it may concern:

Be it known that I, WILLIAM MACK FISHER, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain newr and useful Improvements in Boiler-FurIIaees; and I do hereby declare that the following is afull, clear, and exact description of the invention, that will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part ot' this speciication'.

This invention relates to certain improvements in steam-boilers, more especially designed for locomotive and marine boilers, and

its objects are the attainment of a Inore perfect combustion and consumption of the combustible gases proceeding from the furnace of such a boiler circulation and vaporization of the water.

To this end the invention in one form, asapplied to alocomotive-boiler, consists in arranging in the rear of the tire-box, and between it and the 'front flue-sheet, a chamber with a perforated bottom, for supplying the hot gases from the fire-box with jets of air in quantities suicient to attain a more perfect combustion of such gases as they enter theflues of the boiler. The lire-box and air-supply chamber are divided by a hollow partition provided with a large openingifor the exit ot' the gases from the fire-box, and with legs on either side of such openin g, joining the crown-sheet of the tire-box', Where one ieg terminates,p\vhile the other leg extends up to a point above the water-line in the-boiler and opens in the steam-l space thereof, in con sequence of which construction a good circulation will be maintained through such Waterfpartition and a rapid generation of steam effected.

In the annexed drawings, Figure l is a perspective view of a steam-boiler provided with my invention. Fig. 2 is a transverse section in planes indicated by the broken line :r x of Fig. 1. Fig. 3 is a transverse section in planes indicated by the broken line y 'y of Fig. 1.

The same letters of reference are used in all the figures in the designation of the same parts.

The fuebox A, wherein coal is to be burned and the induction ot' a rapid V on the grate-surface B, may be of the ordinary construction, except that the back is formed by a Water-partition, C, instead oi' by the front 5 5 flue-sheet, I), of the boiler, as is usual. Between this water-partition C and the front line-sheet, l), achamber, E, is formed, the area of which may be about one-third (more or less) of that of the grate-surface of the fire-box. 6o

The bottom of this chamber Elias multitudinous perforations e, through which air ent-ers the chamber in numerous iine jets.

The water-partition C is provided With a large opening, C', crown-sheet of the Tire-box, for the escape of the gases, smoke, 86e., from the iire-box. Cn their way to the fines ot' the boiler these products ot" combustion are In et by and are min gled with the air-jets entering the bottom of cham- 7o ber E, and are thus supplied with the necessary amount of oxygen to insure the complete combustion, practically so, of all the combustible gases and particles escaping from the lire-box in a more or less imperfect state of combustion.

The Water-partition has a leg extending up- Wardly on either side ofthe opening C. The leg C2 terminates with the crown-sheet of the Eire-box,ai1d opens into the water-space ot' the 8o boiler. The leg C3 extends through the crownsheet of the re-box, audits open end reaches into the steam-space ot the boiler. By this means a rapiti circulation is effected.` in the Water-partition, son of its having to endure the intense heat of the furnace. The Water descends through the short leg, While the steam, rapidly generated in the hollow partition, escapes, mingled with heated water, through the long leg, the 9o circulation being materially helped along by gravitation due to the suspension of the holloT partition beloW the body ot' fluid, with which it is directly connected. The upper extremity of leg C3 is rent of steam and Water side of the boiler.

The bottom of the water-partition may be level, as shown in Fig. l, or it may be curved,

toward the opposite with a vIeW of facilitating the circulation Ico through it, in which case the grate-surface should be curved correspondingly, as shown in Fig. 2.

In the illustrated form of the invention the extending down from the H5 which is all important by rea- 8 5 curved to direct the curbottom ot' the hollow the grate-surface.

The perforated bottom ot the chamber E is preferably made ot' two plates, E E', hinged, as shown in Fig. 3, so that they may be turned down into a position for discharging dust and cinders, if such should be deposited thereon.

The plates may be operated by bell-cranks E2 and rods t, or by any other suitable or preferred means. Steam-pipes E4 may also be arranged to blow steam over and through the plates E', if necessary7 to clean the perforations. These steam-pipes might discharge into perforated cross-pipes arranged across the hinged ends of the plates E', and these perforated crosspipes might constitute the shafts or piutles on which or by which the plates are hinged, and the arrangement of the parts might be such that the lowering ofthe plates E would be aecomliianied b 7automat-ic opening of cocks and the blowing ot' steam over and through the said plates.

I prefer to extend the elongated leg of the waterpartition into the steam-space of the boiler in most cases; but it will befound that its extension up to near the water-level in the boiler will answer in many cases to eifect the desired rapid circulation through the said water-partition, and such inodication I consider a part of my invention.

What I claim as my invention, and desire to secure by Letters -Patent, is-

.1. In a boiler-furnace, the hollow water-partition provided with legs of different lengths projecting from its upper side, and applied to ore set forth.

partition is level with airsupply the boiler, substantially as bei 2. In a boiler-furnace, the hollow water-par tition arranged below the body of the fluid, with which it is directly connected, having at one end otits upper side a short leg communicating with the lower portion of said body of tluid7 and at the other end thereof a long leg extending into' the uoper portion of or above said body of fluid, substantially as set forth.

il. In a boiler-furnace, the hollow water-partition arranged below the body of the Huid, with which it is directly connected, having at one end ot' its upper' side a short leg` communicating with the lower portion ofsaid body oflluid, and at the other end thereof a long leg extending into the upper portion of or above said body7 of Huid, and having a curved extremity, substantially as before setforth.

4. In a stean'i-boiler, the water-partition provided with waterdegs, oneterminating ush with the crown-sheet of the tire-box and the other on the opposite side extending into the steam-spaceof the boiler, in combination with an auxiliary eombustion-chamber between the said water-partition and the tube-sheet, the said chamber being provided with a hinged perforated bottom, allowing air in jets, whereby a more perfect combustion is produced and a better circulation ofwater is maintained, substantially as described.

In testimony that 1 claim the foregoing I have hereunto set my hand this 11th day of September, 1880.

WILLIAM MACK FISHER.

Witnesses:

B. E. J. ErLs, JOHN H. WooDWARD.

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