US978326A - Boiler-tube cleaner. - Google Patents

Description

- W. L. MIGGETT.

BOILBR TUBE CLEANER.

APPLIUATION Hum szPT. 2s,'19oa.

Patented Dec. 18, 1910.

3 SHEETS-SHEET l.

W. LMIGGETT.

EoILER TUBE CLEANER.

APPLICATION FILED SEPT. 28, 190B. r

Patented Dec.V 18, 1910.

a SHEETS-SHEET 2'.

@@@Q QQ@ www 35 www Patented Dec. 13, 1910.

3 SHEETS-BHEET 3.

W. L. MIGGBTT.

` BOILER TUBE GLEANBR. APPLIoA'rIoN FILED SEPT. 2a, 190s.

UNITED sTATEs PATENT oEEIoE.

`WILLIAM Il. MIGGETT, F ANN ARBOR, MICHIGAN, ASSIGNOR T0 RAPHAEL HERMAN,

OF DETROIT, MICHIGAN.

BOILER-TUBE CLEANER.

Specification of Letters Patent.

Patented Dec. 13, 191.0.

Application led September 28, 1908. Serial No. 455,054.

la citizen of the United States, residing at Ann Arbor, in the county of W'ashtenaw and State of Michigan, have invented a new and usefulmprovement in Boiler-Tube Cleaners, of wlnch the following is a specification.

This invention relates to a boiler tube cleaner of that type in which a plurality of boiler tubes are simultaneously acted upon `by steam jets and in which the steam delivery nozzle and connecting parts may be projected into the combustion chamber when it is desired to clean the tubes and wholly retracted from said chamber after the Cleaning operation has been completed, so as to avoid unnecessary burning of the parts.

It is the object of this invention to provide an efficient boiler tube cleaner of this character which is simple and compact in construction, which can be easil and conveniently operated and which is self-contained, so that but one support for the same and a ci .mection with the steamsupply is necessary.

In the accompanying drawings consisting of 3 sheets: Figure 1 is a fragmentary vertical longitudinal section of the rear end of a tube boiler and combustion chamber provided with my improved boiler tube cleaner, the movable parts of the latter being rcpresented in the position which they occupy when the cleaner is not in use. Fig. 2 is a fragmentary vertical transverse section taken in line 2-2, Fiof. '1 and showing the movable parts of the c eaner in the position which they occupy while the same is in use. Fig. 233 is a vertical longitudinal section taken substantially in line 3 3, Fig. 2. Figs. al. and 5 are .fragmentary vertical transverse seeti Ams taken in the correspondingly num' 'fbered lines in Fig. 3.

Figs. 6 and 7 are horizontal sections in the correspondingly numbered lines in Fig. 3. Fig. 8 is a fragmentary vertical transverse section taken in line -8-8, Fig. 6. Figs. 9 and 10 are fragmentary perspectiveviews of parts of the cleaner.

Similar .letters of reference indicate corresponding parts throughout \the several views.

The boiler shown in Figs. 1, 2 and 3 of the drawings in connection with my improved cleaner comprises a. horizontal cylindrical body 1, a vertical transverse flue sheet or head 2 applied to the rear end of the body, and a plurality of horizontal longitudinal tubes or fines 3 connected at their rear ends to the rear flue sheet and opening with.

their mouths into the combustion chamber 4 arranged in rear of the boiler. In the construction shown in the drawings, this combustion chamber is formed partly by an upright transverse rear wall 5 arranged at a distance from the rear end of the boiler and a roof or top 6 extending horizontallyfrom the top of the rear wail to the flue sheet above the fine arca. The top or roof of the combustion chamber is provided with an opening 7 adjacent to the upper central part of the flue area through which parts of mv improved cleaner are moved into and out of their operative position, this openingbeing closed by a door, slide or cover 8 when the cleaner is withdrawn from the combustion chamber and not in use. I

My improved cleaner is constructed as follows:

9 represents a bracket or support which is rigidly secured in place above the roof of the combustion chamber adjacent to the cleaning opening thereof. As shown in the drawings, this bracket is preferably secured to the outer side ot' the rear flue sheet of the boiler by bolts 1'0 and forms the sole means ot' supporting the various working parts of the cleaner, so that but one attachment of the cleaner is required for installing the same on a steam boiler. At itsrear end the bracket 0 supports a steam supply chamber 11 which is preferably formed integrally therewith and which receives steam from any suitable source but preferabl through a pipe 12 connecting with one of t e upright lateral sides ot the supply chamber and providedavith a hand controlling valve 13.

On its opposite lateralside the steam supply chamber is provided with an outlet port, passage or openingr l'l which is adapted to register Iwithan inlet port,` passage or open. ing 15 arranged o the upper end of the opposing lateral side of an' intermediate steam conduit 4or extension chamber 16. The latter is vertically movable and carries at its lower end a steam delivery pipeii. nozzle l?? which! is in .communication .with

' the intermediate-conduit and 'pivoted there y to,`so as to `be capable of turning inl a 5 verticalplane parallel Withthe lue sheet or transversely past -the mouths ofY the tubes. The intermediate' conduit anddelivery noz- .Zle' are, ,capable of being moved vertically through thel cleaneropening of the combuslo tion chamber, into, and. out| of the same. l "While in its lower position the inlet port of the intermediate conduit' registersl with" the outlet port of the steam supply chamber so as to receive steam-therefrom but when the intermediate conduit isf 'raised intoi-its iii- .operative position, its-inlet portl Kis out of register with the outletA port 14-of the-steam supply chamber, at. which time thev alvelv 'is'closed to; prevent the escape oflsteam.` ZOWhen thenozzleis .in it-sklower operative posi tion;.i`t=' is incommunication with the interior ofrtheintermediate conduit andreceives steamz'therefrom andit. may be turned on-,the-latter-sothat the nozzle sweeps over y'25 -the-.entire-.lueareaat the rear-ends -ofthe fines', thereby: causing the steaml issuing fromf a` longitudinal. row` of steam outlet: vo pe11in'g ,1'sfl8-in thev rear side thereofffto be directed: successively. intoA the mouths of the 'several'. iiuesof theboiler. for'. removing' the sootand other accumultionstherefrom and carrying the same forwardly to the smoke stack.| :y

The meansA for guiding the'. intermediate conduit: 16 on the bracketI 9 andconnecting` andv disoonnectingthe interior of thesame with vthe interior of the-supply chambermay bevaried'. but the means for this purpose 'shown inthe' drawings are suitable and are 40 constructed-Vas follows: 0n. the side oftheintermediate A conduit' facing' the supply chamber the same isp'rovided'with .a dovetailfribor vtenori the-lower.:partr l9 of which is narrowfwhile-itsupper part` 20- is wide and mergesinto the lower part by an iter. med-iatepart' QIhaVing-the formof adown- 'wardlystapering wedge. The-opposing side of;4 the 'steanr4 supply chamber -isv providedA withl a--dovestaill socket-1 ory 'guide which Te spindle. 'may occupy upon 'being'v rotated. '-The front-part of the hollow spindle projects.

ceivesthe dove-tail rib of theli ntermedi ate steam vcondut`..and-which has av narrow' lower pafrt .22.. and awide" upper' part T23 which .merges intothe lower part-by an--intermediatea paI-'tYZL having ay downwardly.- taperlgfbl. wedge 'form;- Inf-the raisedy y position of' theintermediate; conduit, only tlieflowerfnarrow part oiits dove-tail rib -1 'engages with-.the-lower narrowA pari-t of thel 'GQ-at this time-.being -coi'npara/tivelyv .loose to- "f perrri'it ,tlieconduitandi-,the parts mourit'ed therepn.; to'` be." rai/sedand ylowered Heasily. When; lrfwvrever,A thefntermediate conduit. ist dropped "in'to, itsf owermost osition the 'intermediate conduit, the same Ais also capa- :downwardly-tapering partqof t e dovetail rib engages with the correspondinglyl'- shaped part of the lsocket' of the steam supply`-chamber, whereby -thesepartsare tightened relatively to each other in a direction lengthwise of, the. -boiler tubes., At the same time-that the tapering portion of the dove-tail rib oni 'the intermediate' conduit engages with the dove-tail portion of the. socket on the chamber, the conduit and chamber. are tightened 1'1' on each other in a direction lengthwise o'f-t e axis of the ports 14 and 15 thereof; foijproduing a steam tight joint between the chamber and the conduit.'` This maybe eieeted in variousways-,b'ut preferably. by `p1ovidi`1 1`g{the oppos-v ing sides ofthe chamber: and conduit around their portswith raisedirims, thefaces 2 5 of which are inclined. orl beveled vertically in oppositedireetionsyas show-nin- Figs. 4:, 9 and 10, soithat -when the intemnediatecon# duitfis dropped into.itsfloweimostposition' these incline faces engage each. other and 'causevthe {inter-mediate nduitito :be tight- 'ened on. the steam supply" chamber inaJ direction parallelfwith Ithe -axes of their i 90 ports, and thusprvent the escape. of steam through the joint betweenythe same while the cleaner; islin -use., y v Inadditmn to pivoting the noz'zle on the .bleof moving lengthwise thereQfinto and .out-of: itsoperative position, so to permit of `retracting the nozzle out of, the combusf tion chamber withoutnecessitating fin, undue movement of the intermediate conduitjan'd 10o the parts connected therewith. The preferredmeans for rthus connecting the nozzle with the intermediate conduit whiolriare shown inthe drawings are constructed as follows: 26`represents a hollow. pivoter-10b' .spindle which is journaled 'horizontally and.

lengthwise ofthe boiler tubes ina bearing at the lower end.v of: the' intermediate conduitA and is providedwithinthe latter withone or more openingsv 27, extending. from the bore "11o t'o the' periphery of the 'spindle-A. so that the interior offtlie latter is constantly-in cim. 'municationrwith the interior-of the intermediate conduit. in all positions which. the o beyondthe-front sideof thev intermediate oonduit 'andis'provided at its frontend with an axial steam outletopening 28 which is prefel'ably v arranged opposit eth`e inlet or :rear `120 en d Aof'the'central flue of the .uppermost row f ofthe boiler whenthe'cleaner is .in its inoperative position, so .that the ,steam issuing l fromthisopening enters the respective flueand removesthe soot and: other accumular` tions therefrom. Betweenfthe-frontend of the hollowspindleand the front sideof thev intermediate conduitythe hollow spindle isy `provided on .diametrically op osite sides-l with openings 29- vwhichftrget er. fornr '3 130 socket' whichiis preferably of conical or or inner end of the delivery nozzle is pref.

l erably made of-conical or tapering form, as

shown at 30, and fits tightly into the correspondinglyshaped socket of the spindle when the delivery 'nozzle is moved into its lowermost or operative position therein, thereby forming a steam-tight joint between these parts at this time. Communication with the interior of the spindle and the interior of the nozzle is established when the nozzle is in its lowermost position by means of one or more ports 31 formed in the upper conical part of the nozzle within the spindle land extending from the bore to the periphery thereof. The upper or rear end of the nozzle is preferably closed by a plug or cap 32 which is screwed into the saine and the lower or front end of the nozzle is also closed lby a plug or cap 33 which. is screwed into the same. The. lower or outer plug of the nozzle is preferably provided with a steam outlet o ening 34 arranged lengthwise of the nozz e or radially with reference to the axis of rotation of the spindle and nozzle. The lower end of the intermediate conduit `is also provided with a steam outlet opening 35. When the cleaner is in operation, the steam issuing from the openings 34 and 35 is directed toward different parts of the bottom of the combustion chamber, thereby stirring up any soot lying on the bottom, so `that the same will be lifted and ejected forlwardly through the flues of the boiler by the combined carrying edect of the furnace Y flames and the steam jets issuing fiom the front side of the nozzle when the boiler furf solely by the front tion and the steam is being supplied from another boiler.

raised out of the combustion its lower end is above the top 'Wlien the intermediate conduit and ,the nozzle are in their operative position, the lower end of the conduit projects into the upper partof the combustion ,chamber and the nozzle is wholly within the front coinbustionchamber, as .shown in Figs. 2 and 3. pon turning or swinging the nozzle at this Itime aboutA half a circle from one side of inore times, the steam issues from its front the center of lthe ,boiler to the other oiie or delivery openings over the entire flue area and successively enters the rear ends or lmouths of different groups of tubes, so that all` of the tubes or flues are reached and effectively cleaned bythe direct action of the steam. vAfter the lues or tubes have been cleaned, the. intel-,mediate conduit is chamberuntil of said cham-` the purpose herei'nbefore described.

ber and the nozzle is also moved upwardly through the socket in the hollow spindle until its lower end is above the top of the combustion chamber, as shown in Fic. 1. This upward movement of the nozzle independent of the intermediate conduit permits 0f reducing the aggregate movement of the cleaner when reti-acting the saine from the combustion chamber and also renders the device more compact which isl particularly desirable when the available space above the boiler is limited. The means shown in the drawings for thus moving the cleaner into and out of its operative position and also turning the nozzle while the saine is opposite the fines are constructed as follows: 36 represents an upri ht, vertically-movable gear rack which sli es `with its intermediate part through a guide 37 on a transverse arm' 38 secured to the rear end of the bracket 9, while its upper and lower ends slide in guides or ways 39, 40 at the upper and lower ends of the intermediate steam conduit. 41 represents a gear wheel secured to the rear end of the hollow spindle which projects beyond the front side of the intermediate conduit and meshes with-'theteeth on the adjacent lower part of the gear rack. 42 represents a horizontal shaft journaled lengthwise in a bearing on the Supporting' arm 38 and provided at its front end with a pinion 43 meshing with the teeth on .the adjacent upper part of thc gear rack while its rear end is provided with a handle or hand wheel 44 for turning this shaft.

lVlien the cleaner is wholly retracted from the combustion chamber, as shown in Fig. l, the gear rack is coupled with the intermediate conduitfso that these parts are coinpelled to move together, this coupling being preferably effected by means of a liorizontal pin 45 passing through perforated ears l or lugs 46 `at the upper end of the intermediate conduit and an opening ,4 7 in the 'upper end of the gear iack, as 'shown in Fig. 1. Upon turning the hand wheel in the direction of thev arrow indicated in Fig. l, while the gear rack and intermediate conduit are thus coupled, these members and theparts connected therewith are moved together downwardly through the cleaning opeino` in thc roof of the combustion chainbei'. i .fter the intermediate conduit has reached its lowermost position, fthe coupling pin 45 is withdrawn, so as to disconnect the gear rack from the intermediate conduit. Upon now oscillating the hand wheel and the pinion 43, it raises and lowers the gear rack independently of the intermediate conduit, thereby causing the delivery nozzle to swing transversely buck and forth past the mouths of the boiler tubes for For again withdrawing thclinternimliatc conduit from the combustion chanibei-,the hand wheel 44 is first turned, so as to bring the .coupling opening 47 of the gear lrack 'inline with the openings of the coupling ears 46 after which the coupling pi'n 45 is pushed through these oneningawhereby .the gear` yrack and the intermediate conduit are com pled and these parts may be lifted outof the" combustion chamber by turning the hand Wheel in a direction opposite to that? .indicated by the arrow in Fig. l.

When raising and lowering the intermediate-cham'ber or-conduit out of and into its operative position, the. delivery nozzle is au.- tomatically moved upwardly f and down-A l wardly through the pivot spindle by means 4of an upright doubled chain '48er' other iieXible `member yvhich passes/with its bight or upper part over a pulley, wheel or other memberf49 on .theupper part of the, inter'- mediate conduit while its opposite ends are secured respectively .to'the' bracket 9,fas

' 'shown irr'Fig; 5, or: other stationary part,

L and to the plug at the upper 'end of the nozzle or other part connected therewith. When the intermediate conduit isiin -its highest position,z the pillley 49 doubles the chain to its greatest extent, thereby hold-P Ving the nozzle in its highest position,l as

f shown' in Fig. 1. Upon-lowering the intermediate conduit, the pulley pays out or re. duces the amount of-doubling .of-the chain,1

' thereby permitting thenozzle .to descend by .gravity `simultaneously with the downward movement of the intermediate conduit but at a greater rate, the parts being so proportioned that when the intermediate conduit reachesfits lowermost position-the nozzle is,l

also .in its lowermost position and seated with its upper portion -in the coperating 40 socket on the hollgw spindle. Upon raising the intermediate conduit afterthe cleaning operation, the'doubling :of the chain is ini-- 'creased by the pulley, thereby causing the nozzle to be raised with the intermediate' A 45 chamber but at a greater rate, so that when the `intermediate conduitreaches its up* ermost position abovethe top'of the com us- 'tion chamber, the-lower end of the nozzle has also clearedthe top ofthe combustion .Means are provided for causing the noz-1 zle when in its loweredposition to face with. itsV longitudinal .rowl of perforations `for wardly or toward thel mouths at-the rear 55fendsof the boiler tube, so 'as to deliver. the

.3 vwith a V shaped notclr or recess 57 on.

adjacent part of the hollow:spindle, the sides A of notch converging downwardly. to the bottom-of Vthe same. If the no'zale while being lowered is slightly out of alinement with 5 5. its firent dischargeopeninga; irelatively on itsupper head willengage either one of the twoinclined sides of the guide notch 51 and be directed by the same to the center of the notch when thenozzle reaches vthe end l7o of its. downward movement, and. thereby turns the nozzleso that its front discharge openings face forwardly or axially toward' e boiler tubes when the cleaner `is ready foruse'. 75 The relative location of the openingin the f lgear rack and the perforatedv ears of the in termediate conduit is .'such that when these,4 openingsare in line forthe reception of the supply conduitmovable through saidopening from the exterior to the interior of said chamber and vice versa, anda steam de' livery nozzle rotatable' on said supply conduit on an axis arrangedat right angles to295 the direction vof movement'oftheeonduit and transversely past the ends of said tubes. 2. The combination of a steam boiler hav-V ing tubes, a combustion chamber providedv v"v vith an opening leading from the interiorto the exterior thereof, a movable cover for said 'o' ening, a steam supplyeondufit movable 't rough said openin from" the exterior t0 the interior of said c amber and vice versa, and a. 'steam delivery nozzle'. ,rotatable on lsaid supplyfconduit on an axis arranged at` .ri ht-angles to the directionoimovemento the conduit and transversely past the 'ends-of'said tubes.' i

. 3. The combination 'with a steam boiler 110 having. tubes orilues, apombustion chamber and an openin l froinrthe interior tothe exterior of sai chamber, ofv a steamonduit movable lengthwisethxoug'h said opening into and 'dut ofthe combustion cham- .berend adapted .to remain statimiary'whilel in`its4inneroperative position elativel to the boiler tubes, ganda nozzle pivote' .on said conduitv on. an axis. arrangedv at, right. f

conduit so .as to lsweep pastgthefioutlispfof; the bciler `tubes 'and provided `o n its side.V with openings through which-steamis de# livered into lthe mouths of 'said -tubes..;l. ff

.4. The combination .of a steam boilehav-` `ing tubes, .and a combustion- .chax'nber vprovided with an"` opening` leadingjfrom the interior to the exterior thereof; va stationary r steam conduit. arranged outside 'ofltliecolni coupling pin, the nozzle will yinvariably be 8O interior to the exterior` thereof, .a steam 9o theboil'er tubes, the centering or guidel angles to the direction of .-xuov einentl .of the 12 :kestion chamber, a longitudinally@ .rele 139 having a steam inlet opening and movable termediate conduit on said supply chamber and an upper downwaidly-tapering wide 'stationary steam chamber having a steam amaze steam conduit having a sliding connection l with said stationary conduit and movable i through said opening into and out of said chamber, and a steam delivery nozzle pivl oted on said longitudinally movable conduit on an axis arranged at right angles to the direction of movement of the conduit and adapted to sWee past the ends of said l tubes and having a p urality of outlet openings in its side facing the ends of said tubes.

5. A boiler tube cleaner comprising a outlet opening, an intermediate steam conduit having a steam inlet opening and movable for bringing its opening into or out of line with the oaening of the stationary chamber, and a elivery nozzle pivoted to said intermediate conduit.

6. A boiler tube cleaner comprising a stationary steam chamber having a steam outlet opening, an intermediate steam conduit having a steam inlet opening and movable for bringing its opening into or out oit line with the opening of the stationary chamber,a delivery nozzle pivoted to said intermediate conduit, and means for guiding the intermediate 'conduit on said supply chamber.

7 A boiler tube cleaner comprising a stationary steam chamber having a steam outlet opening, an intermediate stealn conduit for bringing its opening into or out of line with the opening ofthe stationary chamber, a delivery nozzle pivoted to said intermediate conduit, and means for guiding the incomprising a dove-tail rib arranged 011 the intermediate conduit and slidable in a correspondingly-shaped way on the supply chamber.-

8. A. boiler tube cleaner comprising a stationary steamehamber having a steam outlet opening, an intermediate steam conduit having a steam inlet opening and movable for bringing its opening into or out of line with the opening of the statiomiry chamber, a delivery nozzle pivoled to said intermediate conduit, and means for guiding the intermediate conduit on said supply chamber comprising a dove-tail rib arranged on the intermediate `conduit and having a narrow lower part and a wide down wardly-tapering upper part. and a dove-tail guideway formed on the stationary chamber and having a narrow lower part which is adapted to receive the narrow lower part ot said rib part adapted to receive the upper tapering part of said `rib.

9. A boiler tube cleaner comprising a stationary steam chamber having a steam outlet opening, an intermediate steam conduit having a steam inlet opening and movable for bringing its opening into or out4 of line with the openinfr of the stationary chamber, a delivery nozzle pivoted to said intermediate conduit, means for guiding the intermediate conduit on the stationary conduit, and means for pressing said conduit and chamber together when said openings thereof are in register.

l0. A boiler tube cleaner comprisinga stationary steam chamber having a steam outlet opening, an intermediate steam conduit having a steam inlet opening and movable for bringing its opening into or out of line with the opening oithe stationary chamber, a delivery nozzle pivotcd to said intermediate conduit, means tor guiding the intermediate conduit on the stationary conduit, and means for pressing said conduit and chamber together when said openings thereof are in register, consisting of 'aised rims formed on the opposing sides ofthe steam chamber and conduit around the inlet and outlet openings thereof and having coperating inclined faces.

ll. The combination of a steam boiler having tubes, and a combustion chamber provided with au opening leading from the interior to the exterior thereof, a steam conduit movable through said opening from the exterior of said chamber to the interior thereof, a. steam delivery nozzle adapted to sweep )ast the ends of said tubes and having a plurality of outlet openings on the side. next to the ends of the tubes, and a hollow pivot connecting said nozzle and steam conduit on an axis arranged at right angles to the direction of movement of the conduit and forming a passage connecting said conduit and nozzle. p

12. A boiler tube cleaner comprising a steam conduit adapted to rbe moved into and out of the combustion chamber of a boiler, a hollow spindle pivoted on the conduit and having an opening in p its side whereby the interior of the same is placed in communication with the interior of the conduit and also having a transverse socket on one side ot' the conduit, and a nozzle arranged in said socket and provided in its side with an opening whereby the interior' ot' the nozzle is placed in commuuicat'ion with the interior ot the spindle.

l. A. boiler tube cleaner couun'isiug a steam conduit adapted to be moved into aud out ol the eomlnistion chamber ol. a boiler, and a steam delivery nozzle mounted on said conduit. so as to be capable ot' both a longitmliual uuwemcnt thereon and also a rotative movement thereon on au axis arranged at right angles to the direction of movement ot said conduit'.

14. A boiler tube cleaner comprising a steam conduit adapted to be moved into and out of thecombustion chamber of a boiler, a hollow spindle pi voted on the conduit and having an opening in its side whereby the i'iit-eriorofl thesaine splaced in communication with the interior ,of the conduit andA also havnga transverse socketon one -side of the cofdnit, and .'a'nozzle slidable transversely t rough'said socket into and out of its operative' position. f l 15. A boiler tube cleaner comprising n 'steam conduit adapted to be move-d into and out of .the combustion chamberlf va boiler,

a hollowl spindle pivoted on the conduit and t f 'ha ving an .opening in its sideztvhereby the interior of the same is lplaced in communication' with the` interior o-fthe conduit and also having a transverse socket on one side` of the conduit, and a nozzle slidable'trans versely through said socket'into and out of its operative position and provided With an opening in its side which registers lwith the interior of the spindle in the operative position of the nozzle.

16... boiler tube cleaner com rising a y steam conduit adapted to b e'imovec into and out 'of the combustion chamber of a boiler, aholloiv spindlev pivoted on the conduit and having an opening iii/its side whereby 'the interior of the saine is placed in communicae tion .with the interior of the conduit and also having a' transverse socket on one side ofthe conduit, and .a nozzle slidable transversely through said socket into and out of its operative position'and provided with an open-.

ingin 4its si'de which registerswith the interior of the spindle in the operative position' ot the nozzle,-said socket and that part of the nozzle engaging with the sockety in the operative position of the nozzle being of tapering' :toi-in. l

1T; The combinatiomof having horizontal'tubes, a combustion chainber arranged opposite the ends of thetubes and provided in its top with an opening, la

support movable vertically. through said opening-into andout of said chamber, and

a steam delivery nozzle pivoted on said supf pott on an axis arranged at right angles to the direction of movement of said support -and movable through said opening into and .out ofsaidchamber and rotatable past the ends otsaid tubes.

18. A boiler tube, cleaner A comprising a steam conduit adapted to be moved into and out of the combustion chain'l'ier'of a boiler, a

` stationary support on`ivhich said conduit is,

mounted, a steam delivery nozzle 'pivotallysupported on sai/d conduit and receiving steamtherefrom, and means for shifting said4 conduit comprising a gear rack `connected vWith the conduit` and a pinion mounted on said support and 'meshing with said rack.

19. .A boiler tube cleaner com rising a steam'co'nduit adapted to be move( into and out of thc combustion chamber of a boiler, a stationary support on which said conduit is nioun`ted, a steam delivery nozzle pivotally .supported on said conduit and receiving a steamV boi ler -out of its operative position;

'steam therefrom, and means for shittingsaid conduit comprising a' gear rack connected with the conduit and a shaft joiirnaled on l said supportand having aj' handle anda pinion meshing with said rack.

20. A boiler tube cleanerfcomprising a y Steam conduit adapted to be -moved into and i stationary support on Wliichsaid conduit is mounted, a steam delivery nozzle pivotally supported on said conduit and receiving steam therefrom, and unitary means for shift-v l ing said conduit and turning said nozzle.

21, A Aboiler tube cleaner- Comprising "a steam conduit ada ited to be moved into out of the combus ion chamber of a boiler, a stationary support on which said-conduit is mounted, a steam delivery nozzle pivotally supported on said conduit and receiving steam therefrom, and' means for shitingsaid a pinion mounted on said support and mesh-l .ing with said rack, and means for'coupling and uncoupling said rack and conduit; i,

Q2. 4A lboiler'tube cleaner c oinprisimg a .steam conduit adapted to be moved into and' `1 c out of the combustion chamber of a boiler, a

stationary support on which said conduit is mounted, avsteam delivery nozzle pivotally supported on said conduit and receiving conduit and turning said nozzle comprising' a gear'ivheel connected tothe pivot of the nozzle, a gear rack meshing with the gear.

turning therewith, and means for automatically effecting' the sliding movement of the nozzle While moving the conduit' intol and 24. A boiler tube cleaner comprising' a stationary support, a steam conduit movableonv saidsupport into and out of the' coinbus' tion chamber of 'a boiler, a pivot journaled on said conduit, a steam delivery nozzle capablo of sliding transversely on Said pivot and also turning therewith, and means for 'automatically effecting the sliding movement of the nozzle while vmoving the conduit into and out of its operative position consisting of a Wheel or member mounted on the conduit, and achain ormembe'r passout of the combustion chamber of a boiler, a

.conduit andturning said nozzle comprising a gear Wheel connected to the nozzle, a gear rack meshing vvith the gear Wheel and slidably guided on said support,

ivot ot the 'steam therefrom, and means for shifting said of sliding transversely oii said pvot and lalso ing over said wheel and having its opposite ends connected res ectively with said sup- Imouths of the boiler tubes in "nozzle ,ca able of 'slidin port and said n'ozz e.

25. A boiler tube cleaner comprising a steam conduit movable into and out of the combustion chamber of a boiler, a spindle pivoted in said conduit, a steamdelivery nozzle capable of sliding transversely on said s indle and also turning therewith and provi ed in its side with a longitudinal row of outlet openings, and means for centering said nozzle on said spindle so as to cause theoutlet openings of the nozzle to face the the operative position of the nozzle.

26. A boiler tube cleaner comprising a steam conduit movable into and'out o'f the combustion chamber of a boiler, a s indle pivoted in said conduit, a steam de ivery transversely on said s in e and also turnlngtherewith and provi ed in its side with a longitudinal row of Outlet openings, and means for centering said nozzle on said spindle so as to cause the outlet openings of the nozzle to face the mouths `of the boiler tubes in the operative position of the nozzle consisting of a pin arranged on the nozzle and engaging with a V-shaped recess or notch on the spindle,

2i'. A boiler' tube cleaner comprising a steam conduit movable into and out of the combustion chamber of a boiler,` anda Steam delivery nozzle pivoted on said conduit and having a longitudinal row of outlet openings on its front side and a steam outlet openin at its outer end.

28. l boiler tube cleaner comprising a steam conduit movable into and out of the combustion chamber of a boiler, a. hollow spindle pivoted on the conduit and commumcating therewith and having a steam outlet opening at its front end, and a steam delivery nozzle mounted on said spindle and provided on its side with steam outlet open- 1n s.

t). A boiler tube cleaner com rising a steamI conduit adapted to be vertica ly moved into and out of the combustiomchamber of a boiler and having a steam outlet opening directed toward the bottom of said chamber and a steam delivery nozzle pivoted on said conduit to" swinv transversely past the mouths of the boi er tubes and provided on its front' side with a longitudinal row of,

steam delivery openinvs.

fitness my hand this :22nd day of September7 1908.

WILLIAM L. MIGGETT.

Witnesses:

C. E. BARTHELL, WYLIE R. GRIFFIN.

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