US831656A

US831656A - Spark-arrester.

Info

Publication number: US831656A
Application number: US29488206A
Authority: US
Inventors: William L Dudley
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-01-06
Filing date: 1906-01-06
Publication date: 1906-09-25
Anticipated expiration: 1923-09-25

Description

No. 831,656- PATENTED SEPT. 25, 1906.

- W. L. DUDLEY.

SPARK ARRESTER.

APPLICATION FILED JAN. 6, 1908 3 SHEETS-SHEET 1.

.anuav-to'r I No. 831,656. PATENTED SEPT. 25, 1906. W. L. DUDLEY.

SPARK ARRESTER.

APPLICATION FILED JAN. 6, 1906.

3 SHEETSSHEET 2.

Wiliwoooca 3 SHEETS-SHEET 3,

PATENTED SEPT. 25, 1906.

W L DUDLEY SPARK ARRESTER.

APPLICATION FILED JAN. e, 1906.

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Snuenfqz WILLIAM L. DUDLEY, OF NASHVILIiE, TENNESSEE.

SPARK-ARRESTER.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed January 6,1906. Serial No. 294,882.

To all whom it may concern:

Be it known that I, WILLIAM L. DUDLEY, a citizen of the United States, residing at Nashville, in the county of Davidson and State of Tennessee, have invented certain new and useful Improvements in Spark-Arresters and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to that class of devices commonly termed sparkarresters which have for their object the elimination of sparks and cinders from the gaseous prod nets of combustion. These devices are more usually employed wherever engines are operated under forced draft, as in such cases solid particles of considerable size and weight are easily carried out of the stack with the gases. In locomotives the sparks and cinders emitted by the stack are frequently the cause of fires along the right of way and are a source of annoyance to passengers.

The object of the present invention is to provide asimple and efficient means for eliminating sparks and cinders from the gaseous products of combustion prior to their escape from the stack without decreasing the draft and without creating back pressure upon the cylinders.

To this end my invention, generally stated, embraces means for causing the gaseous products of combustion to flow or move in a curved path, whereby the solid particles carried by said gases are projected tangentially by centrifugal force and thus eliminated prior to the mixture of the exhaust-steam with said gases. The particular means shown in the drawings for accomplishing the desired result is embodied in a horizontallydisposed curved peripherallyperforated smoke-flue interposed between the boilertubes and the stack and in such relation to the exhaust-nozzle as that the steam from the latter induces the flow of the gases in the curved smoke-flue and mixes with said gases after the elimination of cinders therefrom,

' whereby a free draft is maintained and back pressure upon the cylinders is avoided.

' There are other minor features of invention involvedin the construction and relative arrangement of the parts, all as will hereinafter more fully appear.

In the drawings accompanying this speciwherein a series of slats are substituted for the perforated outer wall of the curved flue. Fig. 5 is a longitudinal central vertical section on the line 5 5, Fig. 6, of a modified form of the devices, showing the use of a. single curved smoke-flue. Fig. 6 is a horizontal section on the line 6 6, Fig. 5, of the modified form shown in Fig. 5; and Fig. 7 is a vertical section of a portion of the device taken on the line 7 7, Fig. 6.

Like symbols refer to like parts wherever they occur.

I will now proceed to describe my inven tion more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, Aindicates the front fluesheet of a locomotive-boiler; B, that portion of the shell termed the smoke-box; C, the stack; D D, the live-steam pipes leading from the dome to the cylinders and from which, if desired, a jet may be taken to the exhaust-nozzle; E, the petticoat-pipe, and F the exhaust-nozzle, all or any of which parts may be of the usual or any approved construction, though by preference the vertical cross-section of the smoke-box transversely of the boiler is of D form, for reasons which will hereinafter appear. v

1 indicates the top, 2 the bottom, 3 the inner wall, and 4 the outer or peripheral wall of'a smoke-flue of curved form embodying my invention, the curvature being preferably an arc of about one hundred and eighty degrees, though a greater or lesser curvature may be given the flue, if desired. This smoke-flue, which may be of sheet metal, preferably sheetsteel, abuts or is attached at its inner or inlet end to the front flue-sheetAof the boiler, surrounds and includes the rectilinear exhaust nozzle F at its outlet, and is connected with or opens into or opens immediately below the lower end of the etticoat-pipe E orthe stack when the Petticoat-pipe is omitted, so that the roducts of combustion after leaving the oiler-tubes are caused to take a curved path by the action of the exhauststeam, with-which, however, said products do not unite or mingle until they reach a point where substantially all the heavier matters, such as sparks and cinders, have been eliminated and only the' gases and lighter products of combustion remain. The

outer or peripheral wall of said curved smoke-flue is perforated, as at 4 to permit the escape of the sparks and cinders, and the lips or margins of said openings are preferably: curved inwardly, as at 4 to interceptthesparks and cinders and direct them into the openings P.- In the'construction shown in the principal figures of the drawings. two

of said fines, each occupying a lateral half of thesmoke-box B and each delivering at the center of the-boicbelow the petticoat pipe or stack; are 'shown, and-the said flueshave outerwalls 6 which, in connection with transverse walls 6, form a series of peripherallydisposedcompartments 7, that communicate WiththeI-flueand openbelow into a dead- -space b, beneath which is a' hopper 8, provided with a slide-valve 9. This valve may be operated from time to time by the engi-- neer through the medium of a piston and cylinder connected with the air system of the engine to discharge the cinders at such times any obstructions.

As hereinbefore-pointed out, the vertical as the-throttle is closed.- If desired, however, a single curved smoke-flue of the char-i In some instancesyfor the sake of simplic-= ity of constructiony instead :of forming the peripheral wallwith compartmentsfi, as: shown in 'Fig. 3 of the drawings, saidwall may-be'formed of a series of slats 4, Fig. 4, between which the' sparks and cinders will escape directly into the chamberB and drop thence into the dead-space or hopper beneath, and'in order to prevent clogging said slats, if desired, may be pivoted'and connected to a rod in front of or outside the flue and may be operated-by said'rod, as in the case of a.Ve

netian blind or a shaking-grate, to dislodge cross+section-of the smoke-box -B transversely of the boiler is shown in Fig.- 2 as of D form, while in the modification shown in Figm5 the cross-section of-the smoke-box transversely of the boiler is circular or of the common for'm,= ands -it will beinoted that in the-case-of the D cross-section-, Figs. :1 and 2',

the curved smoke-dlue may: be narrowed anddeepened,- as a result of which-any lift from the-lower tubes of theboiler: is avoided and the'deposit and elimination of cinders is facilitated.

A sp ark-arrester embodying the principles of construction hereinbefore set forth will operate as follows: Induced by the exhauststeam issuing from the nozzle the travel of the products of combustion from the boilertubes to the stack will be in a curved path substantially encircling the exhaust-column, and the centrifu al force of the moving gases acting on the sparks and 'cinders willproject the latter tangentiallvthrough the openings in the peripheral wall of the smoke flue and into the dead-space beyond, the productsof combustion entering the path of the. exhaust-steam after being relieved of such matters as would be objectionable-if emitted from the stack.

Among the advantages incident to my in- 'vention hereinbefore set forthare, first, the avoidance of any obstruction to the draft, such as results when spark-arrestingdevices are interposed between the exhaust nozzle and the stack; second-,the avoidance of back pressure on thecylinders' in general: and 'of' back pressure of one cylinder: upon the other,-

and, third, the prevention of cross-firing of the exhaust-steam in the stack, all of which adds to the efficiency of the engine and'saves fuel.

Having thus described myiinvention, what I claim, and desire to secure by Letters-Patent, is

1. In a spark-arrester, the combination ofv a flue-sheet, a smoke-box, a stack, an ex* haust-nozzle within the smoke-box in verti r cal alinement with the stack, =and"an arc-' shaped smoke --flue horizontallydisposed within the smoke box, said flue'having: an

inlet adjacent to the flue sheet and an outlet in vertical alinement with the stack and which incloses the exhaust-nozzles- 2. In a spark-arrester, the combination of a flue-:sheet, a smoke-box, a stack, an ex+- haust-nozzle wlthin the smoke-box in aline-' ment with the stack, and anzarc-shapedsmoke-flue havingits outer wall perforated at intervals, said smoke-flue horizontally disposed within the smoke-box and having an inlet adjacent to the flue-sheet and'an outlet adjacent to the exhaust nozzle and beneath the stack.-

' 4 3. In a spark-arrester the combination 0 a flue-shee=t,' smoke-box, stack, an exhaustnozzle located Withinthe smoke-box beneaththe-stack;- and a plurality of arc-shaped:

smoke-flues horizontally disposed within the adjacent to the flue-sheet and an outlet adjacent to the exhaust-nozzle andbeneath the; stack.

4. In a spark-arrester,= thecombination of a flue-sheet, a smoke+boX-,' a stack, an eX"' haust-nozzle within the smoke-box in verti+ cal alinement with the stack, and'apluralityi smoke-box, each-of said flues havingan inlet of arc-shaped smoke-flues horizontally disposed Within the smoke-box, said smokeues having a common inlet adjacent to the flue-sheet, and a common outlet beneath the stack and which incloses the exhaust-nozzle. 5. In a spark-arrester, the combination of a flue-sheet, a smoke-box, a stack, an exhaust-nozzle within the smoke-box in vertical alinement with the stack, and a plurality of horizontally-disposed arc-shaped smokefiues located on op osite sides of the smokebox, each of said fl iies having an inlet adjacent to the flue-sheet and an outlet which incloses the exhaust-nozzle and is in vertical alinement with the stack.

6. In a spark-arrester, the combination of a smoke-box, a stack, an exhaust-nozzle within the box in vertical alinement with'the stack, and a curved smoke-flue having an inlet, an outlet, and a perforate peripheral wall, said smoke-flue being horizontally-disposed within the smoke-box and having its outlet beneath the stack and surrounding the exhaust-nozzle.

7. In a spark-arrester, the combination of a smoke-box, a stack into which the smokeboX opens, an exhaust-nozzle alined with and delivering into the stack, a curved smoke-flue having a perforated peripheral wall, said smoke-flue disposed within the smoke-box and having an outlet which incloses the exhaust-nozzle and is in vertical alinement with the stack.

8. In a spark-arrester, the combination of a smoke-box, a stack into which the smokebox opens, an exhaust-nozzle within the smoke-box, and an aro-shaped smoke-flue horizontally disposed within the smoke-box and havin an outlet which incloses the exhaust-nozz e. p

9. In a spark-arrester, the combination of a smoke-box, a stack into which the smokeboX opens, an exhaust-nozzle within the smoke-box, and an arc-shaped smoke-flue having its peripheral, Wall perforated at intervals throughout its course, said smokefiue being disposed within the smoke-box and having anoutlet adjacent tothe exhaust-nozzle.

10. In a spark-arrester, the combination of a smoke-box of D-shaped cross-section, a stack into which the smoke-box opens, an exhaust-nozzle, and an arc-shaped smokegue horizontally disposed Within the smoke- In testimony whereof I aflix my signature in presence of two subscribing witnesses.

WILLIAM. L. DUDLE