US477152A - Steam-boiler attachment - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

O. K. PIGKLES 8v J. O'BRIEN. STEAM BOILER ATTACHMENT.

No. 477,152. Patented June 14, 1892.

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STEAM BOILER ATTACHMENT.

No. 477,152. Patented June 14, 1892.

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UNITED STATES PATENT OF ICE.

CHARLES K. PICKLES AND JOHN OBRIEN, OF ST. LOUIS, MISSOURI.

STEAM-BOILER ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 477,152, dated June 14, 1892. Application filed January 15, 1892. Serial No. 418,1d9. (N model.)

To all whom, it may concern:

Be it known that we, CHARLES K. PICKLES and JOHN OBRIEN, both of the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Steam-Boiler Attachments, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

Our invention relates to certain improvements in that class of boilers which have a downdraft and in which the grate-bars are composed of water-tubes; and our invention consists in features of novelty hereinafter fully described, and pointed out in the claims.

Figure I is a vertical section illustrative of our invention, the section being taken on line I I, Fig. III. Fig. II is a similar view taken on line II II, Fig. III. Fig. III is a vertical longitudinal section taken on line III III, Fig. I. Fig. IV is an enlarged detail section illustrating the manner of securing the watertubes forming the grate-bars in place.

Referring to the drawings,1 represents the boiler proper, and 2 the setting.

3 represents the m ud-dru m, connected by a vertical pipe or pipes 4 with the inner end of the boiler.

5 represents the fire-box the grate of which is composed of a number of water-pipes 6, connected at their ends to manifolds or large pipes 7, which are connected to the boiler by Vertical pipes 8, communicating with the ends of the manifolds, as shown in Figs. I and II.

represents the ash-pit, the bottom of which is composed of a grate formed of a number of water-tubes 21, connected at their ends by manifolds or large pipes 22, with the ends of which communicate vertical pipes 8, which form lower extensions of the pipes 8 and form a communication with the pipes 8 between the manifolds 22 and the boiler l.

23 represents a sub-ash-pitbeneath the water-tubes21,as shown in Fig. III. Asameans of connecting the pipes 6 and 21 to the manifolds 7 and 22 we have shown in Fig. IV a threaded end on the inner portion of the water-tubes, which screws into the inner manifolds, and 011 the outer ends of the watertubes are fitted nuts or sleeves 24, which have a tight fit upon the water-tubes and which screw into the front manifolds.

25 represents a wall extending all the way across the furnace between the boiler 1 and the upper inner manifold 7, so as to shut off the draft over the manifold and force the air entering the fire-box over the fuel to pass in a downward direction through the fuel and through the grate 6 and pass through a space 26 between the upper inner manifold 7 and the bridge-wall 27 of the furnace, as indicated by the arrows in Fig. III.

The air entering the sub-ash-pit 23 passes in an upward direction through the grate 21 and out through the space 26, as shown by the arrows in Fig. III.

Any fuel falling through the grate 0 will be caught by the grate 21 and will there be consumed, combustion being supplied by an upward draft, while combustion in the firebox is supplied by a downward draft, effecting a thorough combustion of the gases.

The mud-drum 3 communicates with the lower front manifold 22 through a pipe or pipes 9, the ends 10 of which extend up some distance into the mud-drum, as shown in Fig. III, so as to take the water from the drum above the line of the mud which may settle in the drum.

11 represents a deflecting plate or diaphragm, which extends in a diagonal direction from the inner side of the opening 2, between the drum and the pipe 4, downwardly to a point beneath the open end of the part 10 of pipe 9, its lower end being behind the part 10 of the pipe, so that the mud falling through the pipe 4 and settling in the receiving side of the drum 3 will be deflected be neath the open end of the part 10 of the pipe, and thus not be liable to enter the pipe.

13 represents the pipe through which water is fed to the boiler, this pipe communicating with the drum 3.

A boiler thus constructed is effectual in its operation and can be quickly and easily applied and repaired, and alfords a facility for the circulation of water through the tubes in the direction in which it will most readily pass during the different stages and conditions of heat in the fire-box and the temperature of the water which may exist.

\Ve claim as our iuvention- 1. In an attachment for steam-boilers, the combination of an upper and lower pair of manifolds communicating with the boiler at their opposite ends, water-tubes extending between the upper pair of manifolds and forming an upper grate, water-tubes extend- 5 ing between the lower pair of manifolds and forming a lower grate, a Wall extending across the furnace between the upper inner manifold and boiler, a suitable bridge-wall, suitable drafts above the upper grate and below the lower grate, and an unobstructed passage between the rear manifolds, whereby there will be a downdraft through the upper grate and an updraft through'the lower grate, substantially as and for the purpose herein set forth.

2. In an attachment for steam-boilers, the combination of an upper and lower pair of

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