US252040A - Steam-boiler furnace - Google Patents

Description

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(No Model.)

" M. O. JONES.

STEAM BOILER FURNACE.

Patented Jan 10, 18 82.

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M. O. JONES.

STEAM BOILER FURNACE.

No. 252,040. Patented Jan. 10,1882..

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MILTON O. JONES, OF GREEN ISLAND, NEW YORK.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 252,040, dated January 10, 1882.

Application filed September 16, 1881. (No model.)

To all whom it may concern: Be it known that I, MILTON O. JONES, of Green Island, in the county of Albany. and State of New York, have invented certain new and useful Improvements in Steam Boiler Furnaces, of which thefollowin g is a specification. My invention relates to improvements on the invention for which Letters PatentzNo. 220,827 of the United States were granted to me on the 13th day of July, 1880 and the objects of my presentimprovements are, first, to afl'ord greater protection to the air-box or top jamb-plate against the destructive effect of theintense heat generated in the furnace; second, to provide suitable protection for the front plate of the furnace at the sides of the furnace-door open- 1 ing; and, third, to utilize the currents of air that pass through the protecting-chambers, wherein they are heated and from whence they are conveyed beneath the fire grates to promote the combustion of thefuelin the furnace. In the accompanying drawings,which form part of this specification, and to which reference is made herein, Figure 1 is a detached perspective view of the under side of my improved air-box or top jamb-plate Fig. 2, a front elevation, and Fig.3 anend elevation, of the same; Fig. 4, afront elevation of a boiler-furnace containin g my improvements, showing portions of the front plate, brick-work, &c., broken away for the purpose of exposing the underlying parts; Fig. 5, a partial plan view and horizontal section of Fig. 4, and Fig. 6 a longitudinal section of Fig. 4.

As represented in the drawings, A indicates the air-box or top jamb-plate; B, the side jambplates; D, dead-plate of furnace E, iron front plate; F and G, hot-air fines; H, hot-air-escape pipes; I, ash-pit; J, fire-grates, and K steam-pipes.

The top jamb-plate, A, is fixed over the top of the furnace-door to protect the front plate of the furnace at that point. To better preserve said jamb-plate from the destructive effect of the intense heat of the furnace I preferably make its cross-section of a triangular form, and provide its lower or inclined side with dovetailed snugs a, for receiving protecting-plates A, of fire brick or other suitable heat-rcpellin gmaterial. Said protecting-plates are provided with dovetail portions a, that fit into the space between the snugs a, and with wings a that extend over said snugs to protect them from the heat. i

For the purpose of facilitating the removal and renewal of the protecting-plates A while the jamb-plate is retained in its position in the furnace, a portion of the lower snug a equal to the width of one of the plates A" is omitted and its place supplied by a detachable fastening-piece, a By this arrangement the plates A can be inserted in the vacant space and slid into their places between the snugs a, andwhen the last one of the plates A isinserted the fastening-piece a is secured in place by means of bolts.

The jamb-plate A is divided by vertical par- 1 titions a into the longitudinal flues a? and a,

which connect, at a", near or at the middle of the jamb-plate. When the top jamb-plate, A, is used alone the external air is admitted into its flue a through the opening a", and after passing through said flue, opening of, and flue a", and thereby becoming highly heated, it (the air) may escape through the hot-air-escape pipes a or, when preferred, from pipes leading from the ends of the flue a"; but in either case the heated air may be conveyed through suitable ducts and discharged at any desired point. I

As shown in Fig. 5, the sidejamb-plates, B, are fixed at both sides of the furnacedoor. They run at an angle from the sides of the door to the sides of the furnace, and extend upward from the deadplateD to the under side of the topjamb-plate. The back side of the side jambplate, B, is provided with a division-plate, b,

by which, together with the brick work and iron front plate of the furnace, the revertible flue b is formed behind each of said side jambplates. The said side jamb-plates have their exposed faces covered by protecting-plates B, of fire-brick or other suitable heat-repelling material, and for the purpose of retaining said protecting-plates in place a dovetail snug, b, is formed near the frontedge of the jamb-plate to receive a counterpart dovetail on the protecting-plate, and the rear side of the latter is secured by means of a screw bolt, 11 which, from preference, is inserted in a countersunk hole in the face of the protecting-plate.

Air from the surrounding atmosphere is admitted into the revertible flues I) through openings e in the iron front plate, E, of the boilersetting. The air, after entering the openings e, passes, as indicated by the arrows in Figs.

G, which extend through the side walls of theboiler-setting and connect with the escape airpipes H, by which the air (which has now become intensely heated) is discharged into the ash-pit I, beneath the furnace-grates J. For the purpose of accelerating the flow of air through the flues in the jamb-plates A and B, a current of steam from the-boiler is conveyed through the pipes K, which enter the lower hor'zontal portions of the pipes H, so that the steam will be discharged in line with the axial centers of said horizontal portions of the lastnamed pipes, and in this manner currents of mingled hot air and steam are injected under pressure beneath the grates J, and are there utilized in promoting the combustion of the fuel in the furnace.

When preferred the hot-air-escape pipes H may be arranged to deliver the heated air at any point other than the ash-pit, and in such oasis the steam currents may be dispensed wit I claim as my invention-- 1. The top jamb-plate, A, provided with partitions a for forming the flues a and a, and connecting passage a", as herein described, in combination with protecting-plates A, of fire-brick or other suitable heat-repelling material, detachably connected to said jambplate, as herein specified.

- 2. The combination, with the side jambplates, B, revertible flues b, and inlet air-openings e, ofthe top jamb-plate,A, provided with flues a and a connected to the flues b by means of the flues F, and to the hot-air-escape gipies H, as and for the purpose herein speci- 3. In a steam-boiler furnace, the combination, with top and side jamb-plates for the furnace-door, made separately and connected, as herein described, to form continuous air-circulating flues extending from the air-inlet openings to the hot-air-escape pipes, of the hot-airescape pipes H, provided with steam-pipes K, arranged in relation to said escape-pipes as herein described, for the purpose of forcibly injecting currents of mingled hot air and steam lnto the furnace, as herein specified.

MILTON O. JONES.

Witnesses:

WILLIAM H. Low, 0. J. MATTISON.

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