US1241059A - Spark-arrester. - Google Patents

Description

T. M. VAN HORN.

SPARK ARRESTER;

APPLICATION FILED Nov 2a. 1915.

Patented Sept. 1917.

T. M. VAN HORN.

SPARK ARRESTER.

APPLICATION FILED NOV, I6. 1915.

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T. M. VAN HORN.

SPARK ARRESTER.

APPLICATION FILED NOV, I6. m5.

LMLWQ. Patented Sept. 25, 1917.

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THOMAS M. VAN HORN, OF CHICAGO, ILLINOIS.

SPABK-ARRESTER.

Specification of Letters-Patent.

Patented Sept. 25, 191?.

Application filed November 16, 1915. Serial No. 61,736.

To all whom it may concern:

Be 'it known that I, THOMAS M. VAN Homv, a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Spark-Arresters, of which the following is a full, clear, and exact description, reference being had to the accompanying drawlngs, forming a part thereof.

-My invention relates generally to spark arresters designed for use in the front end of locomotives, and has reference more particularly to the centrifugal type deslgned to eliminate the use of screens in front ends.

The invention has for one of its prnnary objects to provide a compact, durable and efficient form of this type of arrester capable of being employed in the front end of a standard locomotive. Another object of my invention is the provision of novel means for ejecting, at will, the cinders deposited in the receptacle provided to receive them. A still further object is to produce a simplified unitary structure composed of but a few partshaving the capability of cheap manufacture, ease in assemblage, and quick application to the front end when so assemf bled.

My invention also contemplates certain novel details of construction, combination and arrangement of parts of the improved device, whereby to improve the constructlon and increase the efficiency and utility of devices of this character, as will be more fully described hereinafter, and pointed out in the claims.

These, together with such other ob ects as may hereinafter appear, or are lncident to my invention, I obtain by means of the construction illustrated in the accompanying drawings, wherein: p I

Figure 1 representsa side elevation of a locomotive partly in section, illustrating the application of my invention thereto;

Fig. '2 is-a' central vertical section, slightly enlarged, of the front end shown in Fig. 1;

Fig. 3 is a front elevation of the arrester;

Fig. 4 is a central horizontal section taken through the line IV-IV of Fig. 2;

Fig. 5 is a central vertical section along the line VV of Fig. 4; and

Fig. 6 represents a view in perspective of the improved arrester.

My invention is herein exemplified as ap plied in connection with a locomotrve boiler of the present standard type, and in which the numeral 10 indicates the shell and 11 the front end of the locomotive, 12 the fire tubes through which the products of combustion pass from the fire box into the smoke box, 13

is the flue sheet, 14 the smoke stack, 15 the exhaust nozzle discharging upwardly toward and through the smoke stack to accelerate the draft, and 16 represents the dia-- a centrifugal arresting or separating de-' vice indicated as a whole at A in Fig. 1. This device is disposed in the smoke box intermediately of the stack 14 and front 18, and is designed to impart one or more vertically disposed spiral revolutions to the products of combustion as they pass through the restricted passage 9 formed by the diaphragm and the contiguous lower portion of the shell. In constructing this device, I preferably provide a rear plate or baffle 19 extending entirely across the smoke box between the sides thereof and depending from that portion of the upper shell adjacent to and forwardly of the stack down to the lip 16 of the diaphragm.

Projecting forwardly from this rear plate 19 is a tubular collar 20 which has its rear peripheral portion mounted in a centrally disposed aperture formed in the'plate 19, and positioned forwardly of this plate is the other component element of the device. This element includes the front segmental plate member 21 formed about a portion of the forward periphery of the collar 20 and extending radially between such por tion and a corresponding portion of the shell, as best shown in Figs. 3 and .6 of the drawings. The upper and lower terminal edge portions of the plate member are indicated respectively by the reference nu merals 22, 23, the latter being disposed in the vertical median line of the member and the former being obtusely inclined with reference to other said edge portion and constitutes the upper boundary of the outlet pas- Sage 24 of the device, the lower boundary being formed by the deflecting plate member 25 which is secured to and inclines downwardly and forwardly from the rear plate 19, just above the passage to a point approximately midway of the collar 20. This deflecting member 25 merges with the lower edge portion 23 of the front plate by the interposition of the angular member indicated as a whole by the reference numeral 26. These members 25 and 26 bridge between the collar and the shell, and form the spiral portion of the front plate element. An equivalent construction might of course be employed, but I prefer the arrangement shown for the reason that it can be very easily and cheaply made.v

As will be readily perceived, the device A practically effects a division of the smoke box into the two compartments 27 and 28, the forward compartment 27 communicating with the rear compartment through the collar 20, which latter constitutes a conduit 40 for the gases to the smoke stack subsequent to the deposit of the cinders in the receptacle 29 provided in the forward compartment.

This receptacle is normally closed to the atmosphere, and may be provided with an opening 30, and cap 31 therefor, removal of which permits the removal of the deposit of cinders, or the ejecting means disclosed in Fig. 1 may be employed with advantage, or any equivalent device.

Referring to Fig. l of the drawings, it will be seen that I provide a cinder discharge pipe 32 which is associated at one end with the open bottom of the receptacle 29 by an elbow connection 33. The nu meral 34 indicates a steam supply or blast pipe extending from the steam space of the boiler past thecab 35 and thence forwardly and downwardly to have its nozzle end 34f project into the said elbow connection 33 A controlling valve for the supply pipe may be provided, as at 36, and a check valve 37 may also be provided at, the outlet end of the discharge pipe 32, said end preferably though not necessarily terminating in' the ash-pan 38 of the locomotive.

With the foregoing parts positioned and arranged as stated, the operation is substantially as follows: It will be understoodof course that a partial vacuum is produced in the compartments 27 and '28 and in the conduit 40 by thehigh velocity discharge of steam exhausting from the nozzle through the stack, the vacuum inducing a rapid fiow of the products of combustion from the fire tubes and through the contracted throat or passage 9 of the diaphragm into the device A before they" reach the front compartment.

With the nozzle exhausting to the stack a flow is induced in the direction of the latter from the front compartment 27 through the central horizontal passage 40. Itwill be obvious that in passing through the throat or passage 9 and the device vA the products of combustion revolve in the vertically and spirally disposed passage 39 formed therein, and at such a velocity that the revolving movement of the products of combustion continues in the front compartment after leaving the discharge outlet 24, which latter is in direct communication with and lies in said compartment. The centrifugal force thus invoked effects a radial movement of the solid particles toward the shell where they continue to revolve in a circumferential plane until all of the particles gravitate into the hopper receptacle 29.

Inasmuch as the horizontal condult or passage 40 is centrally disposed about the axis of this circumferential plane of movement and considerably restricted in cross-sectional area when compared with that of the front compartment, it will be apparent that so long as this circumferential movement of the particles is maintained only the gases can pass through this conduit and then out through the stack.v The construction and arrangement of the device is such that operatively considered the circumferential portion of the front compartment virtually may be made in the features of construction and arrangement without departing from the spirit. and scope of my invention and improvements. I therefore reserve the right to all such variations and modifications as properly fall within the scope of my invention and the terms of the following claims,

Having thus described my invention and illustrated its use what I claim as new and desire to secure by, Letters P-atent,-. is the following ".110 1. In combination w th a locomotive smoke box and stack, and an-exhaust nozzle, of a spark arresting device having a passage constructed for causing the products of combustion to revolve in the front end of the smoke box whereby to separate the solid particles from the exhaust gases, said arresting device arranged on said front end and provided with an outlet for said products of combustion disposed forwardly of said nozzle and stack, and a conduit for conducting the exhaust gases rearwardly to the stack. I

2. In combination with a locomotive smoke box and stack, of a spark arresting devicehaving a passage spirally arranged in said smoke box for causing the products of combustion to make one or more revolutions in the front end of the box whereby to effect a separation of the solid particles and the exhaust gases, said device having an outlet for said products disposed in said front end forwardly of said stack and constructed for conducting the separated exhaust gases rearwardly tothe stack, and a receptacle disposed adjacent said outlet to receive the solid particles.

3. The combination with, a locomotive smoke box and stack, of a spark arresting device substantiall vertically disposed in said smoke box w ereb to form a front compartment located orwardly of said stack and provided with a passage constructed for causing the products of combustion to peripherally revolve in the front compartment whereby to separate at that point the solid particles from the exhaust gases, and a rearwardly extending conduit positioned centrally with reference to said front compartment'adapted for conducting the exhaust gases therefrom to said stack.

4. The combination with 'a locomotive smoke box and stack, of a spark arresting device disposed in said smoke box whereby to form a front compartment located'forwardly of said stack and vprovided with a passage constructed for causing the prod nets of combustion to peripherally revolve in the front compartment whereby to separate at that point the solid particles from the exhaust gases, and a conduit positioned centrally with reference to said front compartment adapted for conducting the ex haust gases therefrom to said stack, said passage spirally arranged about the said conduit.

' 5. The combination with a locomotive smoke box and stack, of a spark arresting device disposed and arranged in said smoke box whereby to form front and rear compartments therein, the rear compartment communicating with the stack, said device provided with an outlet in the front compartment and an inlet closed off from the rear compartment, and an exhaust conduit leading from the front to the rear compart-' ment for'conducting exhaust gases to the stack.

6. In a locomotive front end, the combination with a stack and-a nozzle discharging theretoward, of a spark arresting device positioned substantially vertically in said front end whereby to form front and rear compartments therein, said device being formed with a rear inlet and a front outlet for the passage of the solid and gaseous products of combustion to the front compartment and having a conduit for conduct.- ing the gases from the'front to the rear compartment, the nozzle discharging to said stack in the rear compartment.

7. The combination with a. locomotive smoke box and stack, of a spark arresting to the rear compartment for conducting the exhaust gases rearwardly to the stack.

8. A locomotive front end arrangement comprising in combination with a smoke box and stack, an exhaust'nozzle, and a diaphragm, of a means for imparting one or more vertically disposed revolutions to the products of combustion in the front end pore tion of the smoke box whereby to effect a separation .of the solid particles from the exhaust gases at that point, said means comprising a separating device provided with a' spirally arranged passage having its inlet shut off from the stack by said diaphragm and its outlet disposed in said front end forwardly of the nozzle and stackand provided with a second passage for conducting the exhaust gases from said front end back to the stack, said nozzle extending through the diaphragm to discharge toward said stack.

9. In a locomotive front end, a spark arresting device positioned in the smoke box to form front and rear compartments therein, said device provided with a passage constructed to impart one or more vertically and spirally disposed revolutions in said front compartment to the products of combustion whereby to separate the solid particles from the exhaust gases and having its outlet opening into the front compartment and its inlet closed off from the rear compartment, a stack leading outwardly from said rear compartment, and a conduit constituting anexhaust passage leading from the front to the rear compartment.

10. The combination with the locomotive front end and stack, of a unitary spark arresting device disposed in said front end to provide a front compartment and formed,

In testimony whereof I have hereunto signed my name.

THOMAS M. VAN HORN.

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