US1498061A - Screen-cleaning device for spark arresters - Google Patents

Description

R. ADAMS SCREEN CLEANING DEVICE FOR SPARK ARRESTERS June 1 7 1924.

Filed July 27.

I4 I! I IIIIIl/lllf'llll 2-Shee1.s-Shaet June 17 1924.

R. ADAMS .SCREEN CLEANING DEVICE FOR SPARK ARRESTBRS Filed July 27, 1922 2 Sheets-Sheet} Fntented June 17, 1924.

NITED STAT-ES RALPH ADAMS, 0F IEbR'ILAND, OREGON.

SCREEN-CLEANING DEVICE FOR SPARK ABRESTERS.

Application filed July 27, 1922. Serial No. 577,898.

To all whom it may concem:

Be it known that I, RALPH ADAMS, a citizen of the United States, and a resident of Portland, county of Multnomah, and State of Oregon, have invented a certain new and useful Improvement in Screen-Cleaning Devices for Spark Arresters, of which the following is a specification.

One-of the main objects of my invention is to provide screen cleaning means for spark arresters and the like which are positioned in otherwise inaccessible places.

A further object is to lessen the fire hazard in logging engines due to defective or inadequate spark arresters.

A further object is to provide means for improving the draft of logging engines inasmuch as my invention can removeclogged surfaces from the spark arrester screen which will otherwise decrease the heating capacity of the logging engine boilers.

Spark arresters as now constructed are placed in position on smoke stacks and are left at the mercy of the elements and are replaced only when entirely inoperative.

' This condition is especially harmful in logging operations, especially in the western woods inasmuch as the fuel used is almost entirely Wood and defective draft cuts down the heating efliciency of the engine. Engineers, to overcome this fault open the throttle and shake down the fuel in the boilers causing great quantities of sparks to be forced thru the screen. lhis temporarily o ens the clogged surfaces but increases the re hazard. The spark arresters are placed on the engines primarily to eliminate the danger of forest fires caused from sparks falling on the slashings immediately surrounding the engine. This action of the engineer which is necessary to keep up the pressure in the boilers defeats the purpose for which the arresters were intended and are thus a source of constant danger. It is impractical for the firemen to climb upon the roof of a logging engine and clean the spark arrester as they are usually hot and in almost inaccessible places. The foregoing facts are equally adaptable to locomotives and stationary heating plants.

By my invention the o erator can clean the screens readily by mere y opening a valve and causing the steam or air to pass thru the screens rapidly and clean the clogged meshes. If steamis used the inherent moisture will also dampen and cool the arrester itself. Thus, during the shaking down operation, the operatoilficould open this valve and dampen the lighted sparks which would force their way thru the screen and render. them harmless.

I attain these objects in the combination with a spark arrester having a perforated section, of a pipe arranged relatively to said perforated section and relatively movable,

over the latter, said pipe communicating.

actuated .by centrifugal force for restrain ing the rate of said movement.

My screen cleaner will sucessfully remove any oil deposits which are contained in the smoke and the sprface will always be bright and free from corroding incrustations.

These and other objects are illustrated in the accompanyin drawings, in which:

Fig. 1 is a side elevation of 211 screen cleaner with parts broken away to s ow features of construction;

Fig. 2 is a top or plan view of Fig. l and indicates the direction of rotation of the cleaning pipes;

Fig.3 is a diagrammatic re 'resentation of the section of my cleaning evice taken on the line 3-3 of Fig. 1 showing the cleaning jet as normal to the screen and the propelling jet at an angle so as to rotate the vapor carrying pipes around the spark arrester;

'Fig. 4 1s a detail view taken .on the line i of Fig. 1 and shows the position of the cleaning ports; Fi 5 is a similar detail view taken on the line 5 of Fig. 1- and shows the cleaning port as spaced between the similar ports in Fig. 4 and the propelling port as slightly on an angle and near the top of the device;

Fig. 6 is a fragmentary section taken on the line 6-6 of Fig. 2 and shows details of construction of the rotary head;

Figs. 7 and 8 are detail views showing the construction of the brackets which hold the cleaning pipes;

Fig. 9 is a plan view of a different type of spark arrester embodying my invention;

Fig. 10 is a sectional view taken on the line 10'-10 of Fig. 9 and shows diagrammatically the operation of the cleaning device removing the incrustations on the interior screen; v

. ig. 11 is a plan view of still another type of spark arrester;

Fig. 12 is a sectional view taken on the line 12-12 of Fig. 11 and also shows in diagram the action of the cleaning pipes;

Fig. 13, taken on the line 13.1'3 of Fig. 12 shows details of construction of the cleaning pipes; and

- the screen and the fluid rushin 1g. 14 is a fragmentary section taken on the line 14 of Fig. 12 and shows in diagram the action of the cleaning pipes. My device is positioned on any standard I 15 common form of spark arrester as a. A

hollow standard or pipe I) is connected with some convenient source of supply and is connected to the perpendicular intake pipe 0 which passes thru the top d of the spark arrester a. On the pipe 0 is mounted a rotary head 6, on the top d, and held in place by a nut f. Between the top d and the nut f the rotary head is allowed rotation. Horizontal pipes g and h are connected with the rotary head 6 and the fluid passes thru them and'thence to the cleaning pipes i and j respectively. Ports k and Z are po-' sitioned in the cleaning pipe 9' and the fluid passes thru them and forces the incrustations on the screen inwardly and away from the screen. The port m positioned in the pipe 1' performs a similar function. Port 2: 1n the pipe 11 is positioned at an angle to thru it and striking the screen causes the c caning pipes to rotate, the sides of the port bein regulated by the speed desired in the c eaning pipes. The cleaning ipe is positioned an plugged by the brac et 0 fastened to the supporting band p. The pipe 7' is positioned in and plugged by the bracket 0' which is also connected to the band 11. The band p is relatively flexible and the cleaning pi hang pendent from their connections with the pipes g and h respectively. .When the cleaning device is rotated, the cleanin pipes i and j tend to swing outwardly an the action forces the band 2 against the sides of spark arrester and the friction limits thespeed of rotation of the device. The rota sad is made with an incision g whigi with ti hfi port r, phe per- 0 ar p1 c. e perpen cu ar 1pc made a shoulder a which presents a bea on which the rotary head can revolve.l ed Ins be ate t ition on t aring so as t d t ke the s ear of this rotary head. In 9 and 10, embodyin the arrester a, a similar device is provi ed. Fluid enters thru the pipe b, thence thru the perpendicular pipe 0', thence to the rotary head e.

7 perform similar The cleanmg' 1 z" and P pas lie previously defunctions to a and scribed pipe. They plugged and held have provided a hardened wearat their upper end by transverse members it and u. In Figs. 11 and 12 embodying the arrester a, fluid enters thru a pi e b, thence thru a perpendicular pipe 0 t ence thru the rotary head 6 and thence to the cleaning pipe 6 and 9' and are plugged by the ca s '0 and '0'. The fluid passes out thru the 0 caning ports [0 Z and m and thru the propelling ports n I claim:

a 1. The combination with a spark-arrester, of means for cleaning the perforated section of the latter comprising, a sprayer connected with a source of fluid under pressure, movable over said perforated section, the sprayer bemg adapted to emit jets of spray against the latter, and an auxiliary jet formoving the sprayer over the perforated section.

2. The combination with a spark arrester having a perforated section, of means for cleaning the perforated section comprising, a sprayer connected with a source of fluid under pressure rotatably mounted on the spark arrester, adapted to revolve relatively to said perforated section, and to emit jets against the latter, said sprayer also adapte to emit an auxiliary jet at an angle against said spark arrester thereby to cause relative revolution of said sprayer.

3. The combination with a spark arrester having a perforated section, of means for cleaning the perforated section comprising, a sprayer connected with a source of fluid under pressure rotatably mounted on the spark arrester, adapted to revolve relatively having a perforated section, of s raying means connected with a source of flui under pressure and adapted to revolve over said perforated section, arms, included in said spraying means supported at one end and adapted to be afiected by centrifugal force, anda brake band, encompassing said spark arrester carried by the free ends of said arms.

5. The combination with a spark arreder havin a perforated section, of a ipearrange relatively to said perfora section and relatively movable over the latter, said pipe communicating with a source of fluid under pressure, spraying orifices in said pipe disposed to emit jets a ainst said perforated section, another ori co in said pi disposed to. emit atjpt at an angle .to said perorated section, ereby'to cause the reaction i the latter jet to give relativemovement to said pipe, and means actuated by centrifugal force for restraining the rate of said movemeat.

7. The combination with a spark arrester having a perforated section of s rayin means comprising a hollow standar axia with the spark arrester, connected with a source of fluid under pressure, a rotary head mounted on said standard, laterally extending hollow arms carried by said rota head, the latter having a port connecting t e hollow arms .with the hollow standard, other arms parallel with the standard fastened at one end to the free ends of said lateral arms, one of said arallel arms provided with spraying ori ces dis osed to emit aajet against the rforate section of the spark arrester and provided also with another orfice dis osed to emit a jet at anan le to said spar arrester, thereby to cause t e reaction due t the latter jet to revolve said rota head.

8. seem ination with a spark arrester having a perforated section of spraying means comprising, a hollow standard, axis. with the spark arrester, connected with a source of fluid under pressure, a rotary. head mounted on said standard, laterally extendone of said encompassing said ing hollow arms carried by said rotaryl head, the latter having a port connecting t e hollow arms with the hollow standard, other arms parallel with the standard fastened at one end to the free ends of said lateral arms, arallel arms provided with spraying ori ces dis osed to emit a jet against the rforate section of the spark arrester, an rovided also with another orifice dispos to emit a jet at an angle to said spark arrester, thereby to cause'the reaction due to thelatter jet to revolve said rotary head, a break band encom assing said spark arrester carried by the ee ends of said p arallel arms.

9. he combination with a spark arrester having a perforated section of spraying means comprising, a hollow standard, axia with the spark arrester, connected with a source of fluid under pressure, the upper end of said standard being shouldered, a rotary head mounted on said standard, and bearing on the head of the spark arrester, a washer on the upper end of said head, a nutthreadedon sai shouldered end of the standard, laterally extending hollow arms carried by said rotary head, the latter having a port connecting the hollow arms with the ho low standard, other arms. parallel with the standard fastenedat one end to the free ends of said lateral arms, one of said parallel arms provided. with sprayingx orifices disposed to emit a jet against t e erforated section of the spark arrester, an provided also with another orifice disposed to emit a jet at an angle to said spark arrester, thereby to cause the reaction due to the latter jet to revolve said rotary head, a break band ark arrester carried by the free ends of sai parallel arms.

RALPH ADAMS.

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