US2958A - Spabk-abeesteb - Google Patents

Description

Y branches of the exhaust pipe.

,TED ZA'STATES PATENT OFFICE. i

JNO. ROEBLING, OF SAXONBURG, PENNSYLVANIA.

- SPARK-ARRUSTER.

Specication of Letters Patent No.

tical position or nearly so, to be placed around the lower part of the chimney, andconnected with each other so, that those adjoining will communicate either at the top or bottom, and cause the smokeV to ascend and descend alternately before escaping into the chimney-in connection with a cistern or reservoir of water, immediately below those tlues, so as to communicate with them and be common to allfor the purpose of directing the sparks, while passing down the descending flues, forcibly and if required, repeatedly, into the water, and thus extinguishing them, at the same time improving the draft by extending the travel of the smoke.' Y Y In order to convey a more clear idea of my improvement, I refer tothe accompanying drawings Nos. l and 2 which represent vertical and horizontal sections of the apparatus.

The drawing No. l exhibits the arrester with but one downward iue.

A shows part of a section of the smoke compartment of a locomotive with the two B is a common chimney pipe,A 13 inches in diameter, cut 0E at a heightof from 3 toll feet.

C is the exhaust pipe which passes through the top of D D the next surrounding case, which has an inclosed top at D', D', and which forms a descending flue, concentric to B, so as to leave a clear space of 2% inches all around the latter. The direction of the draft in the differ-ent iiues is indicated by little arrows.

E E is the water cistern or reservoir with about 6 inches depth of water so as to leave a space of 3 inches below'the lower edge of the flue D D. This cistern should be as wide and large as possible, so as to create a considerable volume of space above thewater for the purpose of reducing the velocity of 2,958, dated-February 1e, y1843.

the draft abovethe surface and producing a calm region. Y F F is the next ascending flue and of the same areal square section as; the others. Its base is enlarged so as to serveas a top to the reservoir, .it terminates .in G a common chimney pipe surmounting the whole and which may be furnished .with hinches so as to be easily lowered when passing viaducts. The exhaust steam discharges into this pipe, through the pipe 0. I f( H is a perforated sheet or wire gauzein the shape-.of an inverted truncated cone, so

fixed, that an open space of 2 inches is'left between its lower edgeat K, and the de-` scending 'luejD. This open space is marked K. [The perforated sheetis only represented. on one side of the drawing, on the other side itis omitted, and instead of it the outer case F is extended farther down, as seen at F so as tov form a separate `space L, into which those sparks will y ofi), Ywhich do not strike the water after the descent. The outer case F, F,Vis widened out at its lower end, F, F, to give room for the .water cistern E, E, and for the perforated co-ne H, when that is used, or'for the space L, when the perforated cone is omitted, and the partition F is employed.

Y rIhe action and t-he use of the apparatus will now be readily understood. The smoke and sparks will rst ascend the pipe B, then descend'the next surrounding flue D D down tothe cistern, wherethe sparks will strike the surface of water 'with considerable force. The greater part of smoke andgases will thence pass through the opening K into the flue .F F and escape into the chimneyGr.,

The perforated sheet or wire gauze serves to arrest those few light and straggling sparks, which may not immediately strike the water. These .will naturally fly oif into the space of the reservoir, formed kby the enlargement at F, where they will either be checked by the cone or settle down of themselves, when out of the reach Aof the draft. This space should therefore be as large as possible. If the holes in the perforated sheet are wide enough, then the space K may be closed. The sheet H, instead of being conical may be in a horizontal position. The

draft will, however, be more or less impaired in that case and I prefer the arrangement as exhibited in the drawing and which has been tested by experiments. If the perforated Hifi -2o areeat once .hurried intok the `water without` sheet is omitted altogether, thenthose sparks which do not strike thewater immediately, will dy olf into the spaceL and, then drop.

` ticle of a spark is seen'fto escape `atfthe top 11e c observed. in firing. up theiengine.- The force of the draftA when running depends however of the chimneyfeven in the darkestVV night.

Theimprovement ofthe draft can be best in a .great measureupon,thepower of the exhaust steam` and Vthe extent of chimney above the orifice of the exhausty pipe so n wardflue.

the, draft in any way.

The number` of concentriofiues may be doubled las ris exhibited vthe drawing No 2. A In this instance it Ais required, that the case ofthe Lrstascending flue should be extended f down, into the water. 'A Theserepeated `ask cents and descents will vinsure the effectual immersion of fall thefsfarks.L yThis however isfwfell enough eii'ecte `by the single downirIhe additional advantage isa V more uniform andsteady draft. Vtfith ref-y erence to draft `the above! arrangementswill be found in strict accordance with'the pneumatic laws. In fact ,the` practice followed in the construction of the Russian stoves and other flue furnaces has long since sanctioned the principle here applied. v

The cistern may be supplied with water by the force pump of the engine through a small feed pipe as shown at a, a, or by the spout at the water stations. Another pipe b, b, passing from the bottom of the cistern Y in front of the boiler through the frame below, and furnished with a cock, will serve to discharge the water and accumulated sparks@ Onenory twolittle gage cocks, 6,10, attached tothe cistern will serve to indicate n the level inside. 'Y f Y f They objection* of top"V heaviness ff made against; most arresters, is entirely kremoved by the above; plan'. i The topy of the chimney terminates Lin a simple pipe; indeed theconV structiony of the whole admits :of such a model as tok effect a'deeided` improvement in ,y

the yappcarence of the engine. i i

What I claim asnew and as my original ,i

invention landl wish to `secureby Letters Batent-isw .l i f n, e

The arrangement of two or more concen- Vso n tric flues, which may bel cylindrical andkin are.

Vvertical position or nearly -so,rto be placedr c j t around the'lower partofthe chimney,and

connected with each other. so, thatk those adjoiningnvill communicate either at the topk f orbottom, and cause they draftito ascendand descend alternately, before escaping into the upper part of they chimney, in connection with aicistern or reservoir :of water, im,k mediately below those lues, Lso kas to vcom 'municate" with theinyand becommon,to all, for the purpose of directingy the sparks-whiie ypassing downthedescending iues,forcibyf endif requiredVK repeatedly,kk intothe water, and `.thus eXtinguishingy them, at the same time improvingthe draftiby extending the c `travel ofthe smoke, the'above apparatus'to be used either in connectionk or without awireau(k

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