US1653113A

US1653113A - Furnace grate

Info

Publication number: US1653113A
Application number: US616909A
Authority: US
Inventors: Chauncey L C Magee
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-02-05
Filing date: 1923-02-05
Publication date: 1927-12-20
Anticipated expiration: 1944-12-20

Description

Dec., 20; `1927.

v c. 1... c. MAGl-:E

FURNACE GRATE 3 Sheets-Sheet 1 Fled Feb. 5, 1923 nl Q @MW 1,

@may

.m W 25 25 2515 25 m Mum,

QE. E.

Dec. zo, 1927. 1,653,113`

C. L. C. MAGEE FURNACE GRATE Filed Feb. 5. 1925 s sheets-shew C. L. C. MAGEE FURNACE GRATE Dec. 20, 1927.

Filed Feb. 5, 1923 5 Sheets-Sheet 3 Patented ec. 20, 1927. i

prrr srs remmen GRATE.

Application filed February This invention relates to furnace grates of the kind shown and described in application Serial No. 586,331 filed September' 5, 1922, and is in the nature of an improvement l 5 thereon.

Generally stated, the object of the improvements constituting the present linvention is to provide means whereby ashes may be accumulated at each end of each compart i ment formed below the upperl portion of the traveling grate, as well as at the front and rearsides of each compartment, so that-the chain grate will dragon an yaccumulatiflm ofV ashes entirely surrounding the top or l open upper end of each compartment, thereby sealing the compartments at their ends as Well as their front and rear sides, by the permanent accumulation of ashes which engages the under side of the upperfportiou of the traveling grate. Y j

It isalso an object to provide certain details and features of construction tending to increase the general leiiciency and the desirability of a furnace grate structure of this particular character.` y y To these andl other useful ends the invention consists in matters hereinafter set forth and claimed and shown inthe Yaccompanying drawings in whichn fi Figure 1 is a longitudinal section of a chain grate furnace construction embodyingthe principles of the invention.

Figure 2.is an enlarged transverse section on line 2-2 in Figure 4. Y c

."I Figure 3 is a detail section on line Sf-B in Figure 4. v v

Figure 4 is a plan of the furnace `grate structure, showing the upper portion of the chain Vgrate fuel support broken away or ren 10 move/dito show the construction ofthe air compartments and otherl elements below.-

As thus illustrated, the invention coinprises a furnace 1 of masonry of anyfsuit.- able or desired character.

intorthc furnace suitable means. VThere is an ashpit 3 rand, a bridge wall V4, withspace 5 immediately below the bridge -wallto receive theclinkers andspentfuel. I v

The chain grate struct-ure comprises transyverse metal beams 6,7, 8 and 9 having longitudinal rails l19 supported thereon.y The chain grate 11 may be of any suitable or desired character, and slideson top of the rails 10, as shown', to support thefuel in position for combustion in the furnace. `The loweiI The coal isfed'` by a hopper 2, or by anyv to speak, by the .ashes which `engage the 5, 192s. seriainaela'eoa' portion of the'chain grate1 rides on the rails.I

12 which are supported by transverse members 18 below. The transverse'membersfarc supported by the longitudinal `side ,frames 14 of the grate structure, which latter' are' in ltui-n.suppoited by 1 wheels 15 resting 4on the stationary railsl arranged in the ma?.

sonry lat the opposite sides l'of thepfurnace. 1n this way the entire grate struct-ure canV be pulledout of the furnacevwhen such is necessary or desirable. f 'I To provide 'af supply of air to the burning fuel, in a way permitting full control there-v of, so that the air can be supplied to'one sec! tionv of the grate and, shut off from another section, in order tc ensure proper combustion of thefuel, transverse'air chambers or comf` partments 17 ,18 and 19 are provided, imme#- diately below the upp-erstretch or portion of, theV beltflike chain grate. f To formk these chambers or compartments transverse sheet metal members 2() and 21 are provided, each' member beingvformed with' a flattop wall and integral and'sloping side walls asshown. The

transverse sheet metalmembers

22 and 23 co-operate with'the transverse beams 8 and 9V to form the other sides ofthe compartments or chambersy l17 and.k 19 inthe manner Shown Ybut the chamber or compartment 18 informed between the ysheet metal members 2O and 21 and the air passes up through the three compartments or chambers and through the burning fuel carried bythe Achainvgrate.` )Sliding plates 24,225 and-26V serve as dampers Afor the lower ends or i beams of the compartments `17,18A an'dil19, respectively, andare 'controlled through the medium 'of rods 27 connected'tothe hand levers 28 at the-front of the'furnace. Thus any compartmentorehamber can be opened at rits bottom,"'to` allowjthe ,air to pass upwardly, Vand'V to; dump thefashes or pieces of fuel,` which may 4fall from the grate. twillV be 5seen, however, that` four accumulations of

ashes

29, 30, B1 and32 are formed on'top ofthe membersf22,

y

20', 21 and 23," `respec tively, plates BBVgbeing the; hollow tran'sverse 'members'to lreepfthe` v'chain grate' from displacing. these accumu lationsV of ashes in a forward .direct-ion."v In this way, the compartmentsor '

air chambers

17, 18 and 1,9are sealed Yatltheir sides, .so

under surface ofthe cha-ingrate, so' that air cannot pass up through one compartment and cross.l over into another compartment, K

saam thejsiaestof, Y

ilo

The ends of these air chambers or compartments 4are closed by the longitudinal frame members 84, which latter have their ends supported by the transverse frame members 8 and 9, as shown, and plates 35 rest on these members on the side frames 14 to for-m a supn port for ashes 36 at. each end of each air` vltingitudinally into either of the other two compartments, Aunder the grate, and cannot 1 pass out at' either end of this compartment,

Ybut -is compelled' to pass upwardly tl'i'ro'ugh the 4`grate andthrough the fuel thereon. rlhe hollow transverse members 22,` 20,' 21 afn ".28 formfspa'ces between the air compartment-s er chainbersand the dampers 24,.

25and 26, r`wlien opened, occupy positions immediately below these spaces or substantially within a, these spaces, in the manner shown. Each'damper is adapted to slide out o f vits spacefandinto position to close the bot- 'tom of the air compartment or chamber, and

eachv damper when Vthus closed willcatch and hold any ashesor pieces of fuel which fall from the grate, but the damperv when opened will dump the accumulation and cause it to fall downward. i c y VI'tw'ill'also'be'seen that a plate 87 is sup- "ported on the transverse beams 6 'and 7, so that thesiftings or screenings l.from the coal will forman accumulation 38 upon this plate to prevent- `air from passing upward through the at-'this point. Between the beanie Valid 8 kthe airis always .free to pass upwardly between the grate Vand the fuel therei o`n,b`u`t beyond the accumulation'29 of ashes' Jthjefsuiliply ofair to the burning fuel is sub-V ject to'jsectioiial regulation, so that air vcan be 'suppliedat one point and shut oll' at lanother ypoint `at will, whereby certain theories regarding the burning of diiferent kinds ofiffuel may be carried out.,A Ajsheet metal bailleV plate 39 is'adjustably secured to the beam Qtor'est 'upon the lowerportion of the'belt like chain 'grate,and is of a length Pand issoarranged .thatair passing upwardly from 'below the grate structure cannot pass 'Hup between'the beam 9 andthe wheels or VAsprockets"40 at the innerend of'{thejgrzde st1ucture. VllithA further respect to then con- Vrtrolling" of the' air in this way, a support 41 in s'placed on the innermost beam 13 to v,enf

"sureau 'accumulation ofa'shes`42 in position to engage the bottom of :the chain grate,

Awhereby air cannot passupwardly'from the pit Sand l vvwall. other words, the air supply below vthegrate lstruct'ure lmust pass up through the then into the space 43 in the bridge .upper portion Vof' the grate at four places structure.

only, to-witt-Betweenthe beams 7 and 8, or through the chamber 17, orthrough the chamber 18, or through the chamber 19, but

at all other points the air is effectively shut 'oill and is prevented from escaping upwardly intothe combustion chamber. The fuel is fed from the hopper 2 on to the grate, and the latter is operated by any suitable means to carry the fuel gradually forward, and the speed of travel is so 'regulated that the fuel n and the stationary structure below, in such.

manner that broken or dragging links will not break anything, for each Vaccumulation is readily displaceable, as these accumula# tions are not restrained laterally, and can easily be pushed off by anything draggungl on the under side of the upper stretch ot the belt forming the grate. ylf 'the stationary f" structure below'were too close, broken or t dragging' `links would catch and malte trouble, and for this reason it is impracticable to have the stationary structure rub on the bottom of the upper stretch of the beltV forming the chain grate; butrby forming and arranging the stationary structuresoine distance below, thus providing ample space ibetween the upper stretch of the grate and the top surface of the stationary structure below, providing wide supports upon which ashes can accumulate, sealing means canbe tormed between vthe air compartments which-will effectively prevent passage of the air from one compartment to the other, but which will at the same time be adapted to permit free movement of any broken or 4draggging links or other parts which may hang down from the 'upper stretch ot the belt forming the chain grate. At thesides ofthe grate,"of course, other accumulations of ashes 'are formed on tliesta-tionary structure, tovrub against the side edges ofr thebelt like struc-A the side edges thereof and the stationary It will be seen that the yplates 35 are Asupported bythe longitudinal framemembers 34, which latter support the transverse 'hollow partitions previously"described The plates 44 are secured to theY upper portions of the longitudinal side portions`1'4`of the stolrer structure, and are located inthe upper portions of the spaces 45 formed between the briclrwork 1 and the outerlsides of the ineinash cavities'for the asli'seals 36 previously described. ln this way, air might pass upwardly in the spaces 45,v but is prevented froml so doing by the ash seals 36, and in A this way no air can passv upwardly into these spaces land then into the compartments 17, 18 and 19 previously described.- Hence the air can `only enter these compartments atV the bottoni of these compartments, `and* the sliding platos have lal'isolute control Of the supply of' air to the under side of the fuel above these compartments.

Lookin(T at Fie. 2 of the drawino's' it will b 25 b 7 A bev seen that-a longitudinal air space is provided beneath each plate 35, formedbetween the beams 14 and 34- at each side of the'grate structure, so that each longitudinal ash seal 535 is formed immediately' above a longitudinal air space, and whereby the transverse air compartments are of less length than the width ofthe grate, lso that'the longitudinal ash seals unite the ends of the vtransverse ash seals. VIn this way, a rectangular' frame-like ash seal is provided,`iir one andthe saine plane, having transverse slots therein formed between the hollow partitions. Thus the ash seals lengageV the lower edges of theT- irons 45, andthe entire grate structure canV be pushedv in and out of the furnace structure, in a manner that will be readily under stood, with both the transverse and the loiigitudinal ash seals undisturbedv on top` thereof. Y

1With the construction shown and dej scribed, and with the entire Stoker supported by wheels 15 on the rail 1G, it is obvious that the entire stolrer can be pulled out with all of the ash seals intact, for cleaning or inspection-or repair. The ash seals 29, 30, 31 and 32, and the lateral ash' seals 36 and 38 can obviously-be formed while the stokei, is outside of the furnace, so that the stoker will be ready to work in the desired manner as vsoonas it is pushed in between the furnace walls, and Without waiting for dropping ashes tog'radually form the ash'seals. Of

course, the dropping ashes can be depended upon to renew the ash seals if theyshould be disturbed or 'knocked olf by the operation Yof the `grate, but when the stolrer isV pulled cutof the furnace all partsthereof, includingi the

elements

85, 44, 33 and 34, and the associated elements, can be'y inspected and repaired and cleaned. l/Vhen the stolzer is pushed baclrinto the furnace, all of the elenien/ts thereof, including` the elements forming' the various ash seals, are automatically brought into the exact relation necessary to foi-inthe ash seals and control the draft in the manner described, and in a manner tof seal the spaces between the sides of the Stoker landV thefurna'ce Walls at certain' points, as

shown and described, in` orderto confine the updraft of theair through the fuel to the air compartments between the different transverse ash seals, and between the `two lateral or side ash seals 36, in the manner-` shown and described. Of course, inasmuch as the ash seal 38, and perhaps theash seal 29, are

not exactlyin a position to be'forinedby dropping ashes, being below the freshfuel,

it is obvious that these ash seals can'be advantageously formed upon their supports beforev the stoker vis pushed into the furnace.

W hat l claiin as my invention isfl. stolrer structure comprising a .con' V.tinuous chain grate, a. series oi partitions? in the space beneath the upperpart of said,k

grate. dividing. said space into a series of coinpartii'ients, `a longitudinal ash support spaced a distance below eachside edge of the upper portion of the'grate, extending a dis-A .I

tance under the grate, being fiat on top and adapted to support ashes thereon to cov operate with the side kedgesof said'grateto sealthe ends of said coinparti'nents,` furnace walls spaceda distance'fron'i the side edges of the upper portion 'ofthe grate, forming spaces to feed. ashes oiitosaid longitudinal ash supports, said partitions" lying some disf. tance beneath the bottom of. saicl upper part,- l

and being-flat ontop and adaptedto support ashes ontheir top portions in the same plane as said first mentioned ashes to cooperatewitli said upper part to prevent papssage of air from one compartment to the next, each partition being hollow and of less' length than the widthof the grate, theop-v positeends of each partition terminating` at the inner edgesof said longitudinal ash sup- .ieri

ports, Vso 'that the sidev edges ofl the `grate ,overhang the ends of said partition, and a member Vslidalile into position beneathfsaidipartition and slidabl'e vtherefrom toclose-the vbottoni of a compartment whereby the pas sage of air through said. con'ipartnient may g bccontrolled, the structure having means fori'ninp,l alongitudinalair spacefbeloiv each longitudinal ash support, between the outer sides ofthe structure and the lends of the partitions, said longitudinal lash supportsforining baille plates to prevent upward pas` sage of air from said longitudinal airspaces, the stoher having means to support the said partitions and longitudinalv members land whereby the op'posite'ends of said compart-k ments Vare' closed yagainstV communication with` said longitudinal air spaces; 2. A stolrer coini'irisingi` a contii'iuous grate, a seriesv ofpartitions vin the spacelbe'- neath the-,upper part of said grrate, "drividingg-Vv said space `into a series of compartments, va

longitudinal ash support 'spacedv a` distance below each side edge of the upper portion of the grate, extending Aa distance under the chain i structure having means i5- grate, beii'igzllat on top and adapted to support ashes thereon to oooperatewith the side i edgeso-t said grate to seal the ends oi said compartments, lfurnace walls spaced -a distance -iroin the sideedgesotthe-upper portionoi the grate, forming spaces to Yfeed ashes onto said longitudinal ash supports,

,said partitions beingtlat on `top and adapted to support ashes -on their top portions to cooperate with said uppeiapart toprevent pasof air from one compartment vto i the next, each partition being `hollow andot less length than' the width ot' the grate, the opposite ends or' each partition terminating at the inner edges oi? said longitudinal ash supports, so that the side edges o'f the grate overhang y having means at its opposite ends to support said longitudinal ash supports, a nicinber i slidable into position beneath said partit-ion and slidable therefrom to close the bottom ot'a conipartment, whereby the'epassage of air through said coinliartinnt may be controlled, and means oi'ierablefreni the 'liront of Vsaid stoker for shifting said member, the

linga longitudinal'air space below each longitudinal ash support, bcti'veen the outer sides oit the structure vneath the fbelow each s and the ends oi the partitions, said longif tudinal ash supports forming battle platesto f -)revent uward oassaee ot air from said l A i o longitudinalair spaces, -the Stoker having means lto support the Vsaid partitions and longitui'linal men'ibers and whereby the opposite ends" of said compartments being ,closed against communication with said longitudinal air spaces.

Y 3. A stokercomprising a continuous chain grate,'a seri-es of partitions in-the 'space beupper part' of said grate, dividing said space into a series Aof compartments, a longitudinal ash support spaoeda distance K/ grate, extending a distance under the grate, being flat on top and adapted tosupport ashes thereon to cooperate with the side 'edges'of said grate to seal the ends of said con'ipartments, furnace walls spaced a distance from the side edges of the upper pori do g spaces to i'eed tion o'f the Orate formin ashes onto said longitudinalash supports,

said partitions being flat on topv and adapted to support ashes on their top portions to cooperate with said chain grate to prevent pas-y i sage v'ot'airf. from one compartment to the s next, each partition being hollow and oi': less length than the width of the O'rate the o Q ov t; c v .J`. :D 7- n site ends oi each parti-tion terminating at the inner edges of said longitudinal ash supports, so that the side edges of the grate overhang the ends of said partitions, and having its opposite ends closed by longitudi- `nal members that also v:form supports forsaid longitudinalv ash supports, a member slidable into positionbeneath said partition and slid` the ends of said partitions,l and Y e o'l the uppervportion of thev able therefrom to close the bottom oa=compartment, Y whereby the` passage of air through said compartment may beicontrolled, and ailever operable fromthe-front of said stoker'iior shifting said member, the structure having means forming a klongitudinal airspace below each longitudinal ash support between the outer sides of thestructui'e and the ends lof the partitions,.said longitudinal ash supports lforming baffle plates to prevent upward passage oiair from'said lon-v gitudinaliairspaces;the stoker having means to support the saidpartitions Yand longitudi- 'nal' members and whereby the opposite'ends ot said compartments are closed against coinmunication with said longitudinalair spaces.

4. A stoker comprisinga continuous chain grate, a series of partitions in thespace begrate, extending a distance under the grate,

heilig' iiat en top and adapted tosuppo'rt ashes thereon to' cooperate with the side edges ot said grate to seal thefends of said compartments, Vvsaid partitions' lying some distance beneath tliefbottoin of said upper part, and being fiat on top and adapted to support 'ashes on their top portions to cooperatefwith said upper part to prevent ipassage of-air from one compartment to the neXt,longi tudinal frame members engaging the ends ot said,I partitions and rforming supports fior said longitudinal ash supports, so that all of the ashes are inthe sameplanefand a member slidable into position beneathfsaid partition and slidable therefrom to close the bottoinof va compartmentwhereby the passage ofvair through said compartment-may becontrolled, each. partition having` itsop.- positeends setina distance under thevgrate and being wider than said slidable'inember partments are closed against communication with saidlongitudinal air spaces;

5. A Stoker comprisinga continuouschain grate, a series of partitions in the space beneath the Aupper part lof said'grate, dividing said space Ainto a series ot-,coinpartmenta a longitudinal ash support spaceda distance below each side-orn the upper portionvofthe grate, extending a distance under thel grate, beingtl'at on top andadapted to support ashes thereon Vto cooperate with theiside" edges `of said grate ltoseal` the ends o fsaid compartments, furnace walls spaeedladistance from the side edges of the upperfportion of the grate, forming spaces to feed ashes onto said longitudinal ash supports, said partitions lying some distance beneath the bottom ot said upper part, and being flat on top and adapted to support ashes on their top portions to cooperate with said upper part to prevent passage ot air from one'compartment to the next, means `forming an ash cavity at the outer' side of each longitudinal ash support, and a horizontally disposed member slidable into position beneath said partition and slidable therefrom to close the bottom of a compartment whereby the passage ot air through said compartment may be vcontrolled,'each partition having its opposite ends set in a distance under the grate and beingwider thansaid slidable `member so as to permit the latter to be withdrawn thereunder7 that edge of said partition under which the slidable member moves. lying closely adjacent thereto so `as to scrape'oti' any ash accumulated thereon as said slidable member is retracted, the structuie having n'ieans forming a longitudinal air space below each longitudinal ash support, between the outer sides ot' the structure and the `ends of the partitions, said longitudinal ash supports forming baille plates to prevent upward passage ot air from said longitudinal air spaces, the'stokervhaving meansl to support the said partitions and longitudinal members and whereby the opposite ends of said compartments are closed against coin- ,munication with said longitudinal air spaces;

6. A stolter comprising acontinuous chain grate, a series oia partitions in the space beneath the upper part of said grate, dividing said space into a series of compartments, a longitudinal ash support spaced a distance below veach sideV edge .of theupper portion ot the grate, extending a distance underl the grate, being fiat on top and adapted to support ashes thereon to cooperate with the side edges ot'said grate to seal the ends ot said compartments, furnace walls spaced a dis tance from the side edges ot the upper portion ot' the grate, forming spaces to feed ashes onto said longitudinal ash supports, saidr partitions having their opposite ends set in a distance under the grate and lying some distancebeneath the bottom ot said uppery part, and being iat on top and adapted to support ashes on their top' portions to cooperate with said upper part to prevent passage ot air from one compartment tothe nent, ijneans for supporting said longitudinal ash supports in position to support the ashes thereon inthe same plane as the ashes on said partition, so that the entire ash seal is integral and rectangular and has transverse openings forming the tops of ysaid compartments, and a member slidable into position beneath said partition and slidable theretrom to close the .bottom of a compartment whereby 'the passage ot air through said compartmentinay be controlledhsaid slidable member being adapted `when'closedto catch ashes sitting through the upper partof 'saidy grate to further :sea-l the same, the structure having means forming a longitudinal lair space below each longitudinal ash support between the outer sides of the structure and the'ends oi thepartitions,` said longitudinal. I

ash supports toi-ming baiileplates to prevent upward passage of air from said longitudinal air spaces, the stolrer having means to support the said partitions Yand longitudii l nal men'ibersand'whereby the'opposit'e ends of said compartments are closed against communication `with said longitudinal air spaces.l Y

7 A stolrer comprising a continuous chain grate, a series of partitions inthe space beneath'the upper part oit said grate, dividing said space into a series of compartments, a

.longitudinal ash support spaced a distance below each side ot the upper portion oft the,

grate, extending a distance under thegrate,

being flaton top andadapted to support ashes thereon to vcooperate with vthe side edges of said grate to seal the ends of said compartments, furnace walls spaced 4a distance from the side edges of the upper portion ot the grate,` forming Aspaces to feed ashes onto said longitudinal ash supports,-

l:said partitions having their. opposite ends setr in ardistance under the grate andlying some distancebeneath the bott-om oi said upper part, andbeing flat on top andadapt-V ed to support ashes on their top portions to cooper/ate with said upperV part to prevent passage of airfrom one compartment tothe next, means forming an ash cavity at the outer side of each longitudinal ash support,

and a, horizontally disposed member 'slidable into position beneath said 'partition and slid"V able therefrom to close the bottom of acomfpartment whereby the passage'of air through said compartment'inay bef'controllech each partition being wider than, said slidable Y member so as to permit the latter to be L'withdrawn thereunder, that edge of said lpartition under which the slidable member moves lying closely. adjacent thereto so as to scrape oft any ash accumulatedthereon as said slidable meinberxis retracted,and means torming vertical space at each side `ot the stoker'structure, whereby 'airmight pass upwardly in each vertical spaceand into said compartments, but inwwhich said vupward passage of: air is Vprevented' by the ashes `which accumulate in said ash cavity 'at each side of the grate, ,the structure having means :forming a longitudinalair space below each longitudinal a'slisupport, between the outer sides of the 'structure and the ends joit' `the* partitions, said longitudinal ashsupports forming baffle plates to prevent upward pas.v lsageof vair from said longitudinal `air spaces,

vtheE sto'ler having meal "sito support the said i `l.-1.`: I vpartitions and longitudinal i'i'iei'nbers and Y whereby the 'opposite ends of said compartn'ie'nyts are closed against conuin'lnication with 'saidvr loiigitudmal air spaces. Y f

' 8; A stolrer comprising acOntimiOuschaingr te; a series Aof partitions in tliespace be` n, l h 'the upper part of` said grate, dividing saidspace intoV a series of compartn'ients,

alongitmlinal ash support spaced a disltance below each side edge of the upper portion of the grate, extending a distance under the grate, lbeing hat onitop'y and adapted to support ashes thereon to cooperate with the ide. edges lofsaid gratel to seal the ends of said compartments, furnace walls spaced a distance from the side edges of Ythe upper portion of the grate, forming spaces to feed ,ashes onto said longitudinal rash supports, saidY partitions having their opposite ends set in a `distance 'under the grate and lying some distance beneath the'bottom of said upper part,`andbeingnat ontop and adapt- 'ed to supporty asheson their top portionsto cooperatewith said upper part to prevent passage ofair fromlone lcompai-tinent to the next', meansfor supporting 'said longitudinal ash supports in" positionl to support the ashes' thereon in the same plane as the ashes r'isaid partition, so that the entire ash seal is integral and rectangular and" has transverse openings lforrning the tops of saidco'inpartments, and a member sli'dable into posi4 tion beneath said partition and s lidable therefrom toclose' thebottom of a compartment whereby the passage ofl air through saidv compartment mayy be controlled, said Slidable'-member being adapted wheny closed i Y Y H 111g balile plates to pr 'ent upward passage lof airv from said longitudinal vair' spaces, the Stoker having means t0 supportthe' said partitions and longitudinal members and whercthe opposite `ends said Comparti'nents are closed' against communication withsaid longitiidinal airv spacesf I9. stolrer'strueture comprising a contin'uous chain grate, a series of partitions in they space beneath the upper part .of said grate, dividingl saidspace into a series of compartments, a 'vlongitudi al yash support *spacedadisancgtutw si@ iside aus@ la 1n eans forni in o' f ash supports form-- iigess'iis upper portion' ofthegrate,beingflat on top and adapted to support ashes thereon tojco'- Aoperate withfth'e' side edges ofV said grate to Iseal the ends of said cou'ipartments, long'i? tudinal frame members forming the sides of the structure, meansV fornung an au* space atthefouter side' of each Vfrau'ie member,

ash seal'to prevent air from rising at each kside of the grate from'said air spaces, Said i partitions lying somel distance beneath the bottom of said upper part, and being ila't on top and adapted tov support ashes ontheir ytop portions in the same plane-"as said st 'mentioned ashes to cooperater with said`up'- per partto' prevent passage of air from one compartment'to the next, each partition bcing hollow, and 'a' member slidabl-e interposition beneath said partition and slidable therefrom to close the bottom of a compartn'ielntuvhereby the passage of air through said compartment may be Controlled, in com'- binationv with means whereby'- the entire Stoker is movable bodily out ofthe furnace with said accumulations of ashes in place and is also movable into the furnace-with said longitudinal ash supports in operative relation to said iix'ed ash engaging means on the furnace walls. 1 i

l0. A stoker structure comprising ay continuous chain grate, a series of partitions in the space beneath the upper part of said grate, dividing said space into a series cron'ipartments, a .long'gitudinal` ash support spaced a distance'below each side edge of the upper portion of the grate, being flat on top and adapted to support ashes thereon to cooperate with the side edges of said grate to seal the ends of said compartments, furnace walls spaced a distance from theside edges of the upper portion vof the grate, forming spaces to feed ashes onto said longi tudinal ash supports, longitudinal frame n'iembers forming the sides of the structure,

A QM auaii' space at the outer Sides of each frame member, means to prevent the ashes from falling into said air spaces, at each side of thestructure, and

means lined on the `furnace walls. and engaging` the top of each longitudinal ash seal to' prevent ail-from rising at each vside of the grateA from said air spaces, said partitions being flat on top and adapted tosupportashes on their top portions to cooperate with said upper part to preventV passage of air from vone compartment to the next, each paitition being hollow, and having means at its opposite ends to support said longitudinal ash supports, a member slidable into position beneath said lpartition and .slidable t J,efrom to close the bottom of a c0mpartwh-euebj7 thel hssage of air through i Vnessus said compartment maybe controlled, and

means operable from the front of said stoker for shifting said member, in combi#- nation with means whereby the entire stoker is movable bodily out of the furnace with said accumulations of rashes in place and is also movable into the furnace with said longitudinal ash supportsl in operative vrelation to said fixed vash engaging means on the furnace Walls.

. 1.1. A stolzer structure comprising a con-y tinuous chain grate, a series of partitions in 'the space beneath the upper part ofsaid grate, dividing said space into a series of compartments, a longitudinal ash support spaced a distance below each side of theupper portion of the grate, being flat on'top and adapted to support ashes thereon to cooperate with the side edges ofsaid grate to seal the ends of said compartments, furnace s walls spaced4 a. distance from the side ledges of the upper portion of the grate, forming spa-Ces to feed ashes onto said longitudinal ash supports, longitudinal frame members forming the sides of the structure, means forming an air space at the outer side of' each frame member, means to preventthe ash-es from falling, into said air spaces, at each side of the structure, and means fixed on the furnace Walls and engaging thetop of each longitudinal ash seal to prevent air from rising at each side of the grate from said air spaces, said partitions being flat on top and adapted to support ashes on their top portions to Vcooperate Wit-h said chain grate to prevent passagev of air from one compartment to the next, each partition be- (Sii ing hollow, and `having its opposite ends closed by lonlgitudiilial members that also form supports for said longitudinal ash supports, a member slidable into positionloen'eath said partition and slidable therefromV to close the bottom of a compartment, Where by the passage of air through said compartment may be controlled, and alevcr operable from the front of said stoker for shifting said member, in combination withn'ieans whereby the entire Stoker is movable bodily outof the furnace Withsaid accumulations 'of ashes in place and isalso movable into .to cooperate With the side edges of said grate to seal the ends of said compartments,

furnace Walls .spaced a distance from the side Vedges ofthe upper' portion of the grate,

vforming spaces to feed [ashes onto said longitudinal ash supports, longitudinal frame members forming the sides of thestructure, means forming an hair space at the outer side of each frame membeig'm'eans to yprevent the ashes from fallingyinto said air spaces, at-each'side ofthe structure, and means fixed on the furnace Walls and engaging the top of eachlongitudinal ash seal to prevent air'ffrom 'rising .ateach 'side of the grate from said air spaces, said parti` tions lying somevdistance beneath the bottom of saidY upper part, and beingriiat on top and adapted to support 4ashes `on their top portions to cooperate with said upper part to preventv passage of'air from one compartment'to the next, longitudinal members engaging the ends of said partitions and forming supports supports, so that all of .the ashes are in the vsam-e plane, and a member slidable into position beneath said partitionaiid slidable' therefrom to closev the bottom of a compart- Cir for said longitudinal ash ment whereby the passage of air' through.l

saidfcompartment lmay be controlled, each partition being Wider than said slidable' inembei-Vso as to permit the latter i to be Withdrawn thereunder, in combination with means 'whereby the entire stolzer lis movablel bodily out of thefurnace with said accumulations of ashes in place and'is also movable into the furnace with said longitudinal ash supports inoperative lrelationtosaid fixed ash engaging means on the furnace Walls.l if( v f 18. A stokerstructure comprising .a continuous chain grate, a series of partitions in the space beneath the upper part `ofsaid grate, dividing said'space into a series `o't compartments, a, longitudinall ash support spaced a distance belovv eachside of the upper portion of thefgrate, being fiat on top and adapted to support ashesthereon to cooperate with the sidel edges ofsaid grate to seal the ends of said compartments, furnace Walls spaced va distance from. the side edges of the upper portion of the grate, forming spaces to feed ashes' onto saidlongitudinal ash supports, longitudinal vframe members forming the sides'of.thestructure, means forming an airspace at the outer side of each frame member,k means to prevent the ashes from` falling` into said air spaces, at each side ofthe structure, and mea-nsiiixed on the furnace Walls and engaging the top of eachv longitudinal ash seal to prevent air from 'rising at each side of the grate from f said'air spaces, said partitionslying some distance beneath the bottom of said upper part, and being .flat on top and adapted to support ashes on their top portions to coopcrate with said upper .partto .prevent passage of air from one'fcompartment tov the next, vmeans forming an ash cavity atthe outerside of each longitudinal iash siuapoi-t,y

Yabletherefrom to close the bottom of a compartment whereby the passageof air through Vsaid compartment may be controlled, each .partition being wider y than rsaid slidable member so faste permit the latter to be withdrawn thereunder, that edge of said partition*under-'which the slidable member moves lying closely adjacent thereto so as to scrape ofi' any Aash accumulated hereonas saidslidable member is retracted,v in combination withmeans whereby the entire stolier is `movable bodily out of the furnace with said .accumulations of asheswin place and is also movable into the furnace with said longitudinal ash supports in operative relation tosaid lined ash engaging means on the furnace walls.

la. A stoker structure comprising a continuous chaingrate, a series of partitions in the spaceV beneath the upper part of said grate, dividingsaid space into a series of compartments, a longitudinal ash support spaced` a. distance below each side edge `of the upper portion ofthe grate, being flat on I top and adapted to support Lashes thereonito cooperate with the side edges of said grate .to seal the ends of said compartments, furnace walls spaceda distance from the side edges of the lupper portion of the grate, forming spaces to feed ashes ontosaidlongitudinal ash supports, longitudinal frame `members forming the sides of the structure,

" means forming an air space at the outer side of each frame member, means t0 prevent the ashes from falling into said air spaces, at each side ofthe structure, and means hired on the'furnace walls fandengaging the top of each longitudinal ash seal to prevent air from rising at cach side of the Agrate from V'said air spaces, said partitions lying some distance beneath the bottom of said upper part, and being flat on top and adapted to support ashes on ltheir top portions to cooperate with said upper part to prevent passage of air from one compartment to the next, means for supporting said longitudinal ash supports in position to support the ashes thereon in the same plane as the ashes ou said partition, so that the entireash seal Y is integral and rectangular and has transi Cil verse openings forming' the tops of said compartments, andl a member slidable into position beneath said partition and slidable therefromto close the bottom of a compartment whereby the passage of air through "said compartment may be controlled, said slidable member being adapted ,when closed to catch ashes sifting through the upper part rof said grate torfurt'her seal the same, in

combination with means whereby the entire n Stokery is movable vbodily out of the 4furnace with said accumulations 0f ashes in place and is also movable `into the furnace with per portion of the grate, being flat on tgp von the furnace walls.

said longitudinal ash suppor'tsinoperative relation to said lined ash engaging means l5. A Stoker structure comprising` va continuous chain grate, a seriesl of partitions in the space beneath the upper part of said grate, dividing said space into a series of compartments, a longitudinal ash support spaced a distance bel-ow each side of the 'upf per portion of the grate, being fiat on topY and adapted to support ashes ythereon tol cooperate with the side edges offsaid grate to seal the ends of said compartments, furnace walls spaced a distance from the side edges of the upper portion of the grate, forming spaces to feed ashes onto said longitudinal' ash supports, longitudinal frame members forming the sides of the structure, means forming an air space at the outer side of each frame member, means to preventl the ashes from falling into said air spaces, at each side of the structure, and means iiXed: on thevfurnace walls and engaging lthe top of each longitudinal ash seal to prevent air from rising at each side of the grate from said air spaces, said partitions lying some 7distance beneath-thebottom of said upper part, and being flat on top and adapted to support ashes on their top portions to cooperate with said upper part to prevent passageof air from one compartment to the. next, means forming an ashcavity at the outer side of each longitudinal ash support, and a horizontally disposed member slidable into position beneath said partition and slide-ble therefrom to close the bottom of a compartment whereby the passage ofv air through said compartment may be controlled, `each partition being wider than said slidable member so as to permitt-he latter ,to be withdrawn thereunder, that edge of said partition under which the slidable member moves lying closely adjacent theretovso las to scrape off any ash .accumulated thereon as said slidable member is retracted, and means forming a vertical space at each side of the stolrerstructure, wherebyA air might pass Yen Zoo

lOS

upwardly ineach vertical space' and into said compartments, .but inl which said upward passage of air is prevented by the ashes which accumulate in said ash cavity at each side of the grate, in combination with means whereby the entire stoker is movable bodily out of the furnace with said accumulations of ashes in place and is also movable into the furnace with said longitudinal ash supports in operative relation to said fixed ash engaging means on theifurnace walls.

16. A s toker structure comprising a con tinuous chain grate, a series of partitionsin the space beneath the upper part of saidygrate, dividing said space into a series of conipartments, a longitudinal ash support spaced a distance below each side edge of the up- Li u and adapted to support ashes thereon to cooperate with the side edges of said grate to seal the ends of said compartments, furnace, walls spaceda distance from the side edgesy ash supports, longitudinal frame members forming thel sides of the structure, means forming an air space at the outer side of each frame member, means to prevent the ashes from `falling into said air spaces, at each side of the structure, and means iXed on the furnace Walls and engaging the top of each longitudinal ash seal to prevent air from rising at each side of the grate from said air spaces, said partitions lying some distance beneath the bottom of said upper part, 4and being flat on top and adapted to support ashes on their top portions to cooperate with said upper part to prevent passage of air from one compartment to the neXt,-nieans for supporting said longitudinal ash sup.-l

ports'in position to'support the ashes thereon in the same plane as the ashes on said partition, lso that the'entire Vash seal is integral and rectangular and has transverse openings forming the tops of said compartments, and a member slidable into position beneath said partition and slidable therefrom to close the `bottom of a compartment whereby the pas-vsage of air through said compartment may be controlled, said `slidable member being adapted when closed to catch ashes sifting through the upper partof said grate to fur-V If ther seal the same, and means forming a vertical air space at each side of the Stoker` structure, whereby air might vpass upward- 1y in each vertical space and into "said compartments, but which upward passage of the air is prevented by the ashes which accumulate on the longitudinal ash support:

below each side edge of the gratein comA bination with means whereby the entireV stolzer is movable bodily out of the ofurnace f V'with vsaid accumulations of ashes in place and is also movable into the furnacewith.

said longitudinal ash supports in operativeV relation to said fixed ash engaging means on l theiipperlpart of the grate a distanceabove vsaid'partitions and longitudinal ash supports, upstanding means on the edge of one i the furnace walls. c

17. A Stoker comprising a .Continuous chain grate, a 'series of partitions in the space beneath theupper part of saidV grate, ,divid-I ing said space into a series of compartments,

a longitudinal ash support spaced al distance lbeloweach side edge of the upper portion ofthe grate, being fiaton top and adaptedv to support ashes thereon to cooperate 'with'y the side edges of said grate to sealthe ends.,`

of said compartments, furnace walls spaced a distance from the side edges of the upper portion ofthe grate, forming spaces to feed Cp ashes onto said longitudinal ash supports, z means forming air spaces at opposite sides of the Stoker, between the outer sides of the Stoker and the inner sides of the furnace A`iiig said member.

walls, upstanding means to prevent the ashes on said longitudinal supports from ,falling into saidv air spaces, spaced outwardly a distance` from the side edges of the upper vin 'the` same plane as said first mentioned ashes to cooperate with said upper part to prevent passage of .air from'one compartment to the next, rails to support the upper partv of the gratey a distance above said par-` ,titionsfand longitudinal ash supports, up-

standing means on the edge of one or more of said partitions'betweeii said rails to prevent the, ashes thereon from falling into said compartments, each partition'being hol- V low, and a member slidable into position beneath saidpartition and slidable therefrom`y to close the bottom of a compartment where-vv i env by the passage-,ofair through said compartment may be controlled.

18. A stolrer comprisingV a' continuous chain grate, a seriesy of partitions inthe space beneath the upperpart of said grate, dividing said-space into 'a series'ofcompartments, a longitudinal ash support spaced av distance below'each 'side edgevof the'upper portion of thegrate, being flat vlonftop and adapted to supportl ashes thereon to cooperate with the side edges of said grate to seal the ends of said compartments,.furnace walls spaced la distance from the vside edges ofthe upper portion of thel grate, ,forming spaces to. feedf ashes onto said longitudinal ash supports, means forming air spaces at opposite sides of the stolrer, between the outer sides of v the stoker and the inner sides of the furnace v Walls, upstanding means to prevent the ashes on Vsaidlongitudinal supports from falling .in to said air spaces, spaced outwardly la lill) distanceifrom the side vedges of the upper -partv of the grate, said, partitions beingflatf,

on topland adapted to support ashes ontheir top portions to cooperate with ,said upper part to prevent passage of air from one compartment to the next,l rails to ysupport 1 l into said compartments, eachjp'artitionfbef ing hollow, and having means at its oppof site ends to support said longitudinal ash f supports, a member slida'ble intopositionrbe neath said partition and slidable therefrom to close the bottom of a compartment, wherelby the passage of air througlisaidfcomartment may be controlled, and means operable-,from thel front of saidstoker for shift.-

, 19.' A stoker comprising acontinuous chain y 4 grate, a series ofpartitions in the space be- ILC)v neaththe upper Vpart-of said grate, dividing said space into a seiies of compartments, a longitudinal ash support spaced a distance belov7 each side ofthe upper portionof the grate, being flat on top and adapted to support ashes thereon to cooperate with the side edges of said grate to seal the ends oi said compartments, furnace walls spaced a distance Jfrom the side edges of the upper por-v tion` oi' the grate, forming spaces to feed ashes: onto said longitudinal ash supports,

means forming air spaces at opposite sides ofthe stolzer, between the outer sides or the stoker and the inner sides of the furnacev Walls, 'upstanding means Ato rprevent thev ashes onv said longitudinal supports from.

falling into said air spaces, spaced outwardly a distance from the side edges of the upper par-tof the grate, said partitions being liat into said compartments, each partition beingy hollow, and having` its opposite ends closed' by'l'ongitudinal members that also torni supf' ports for said longitudinal ash supports, a

i member slidable into position beneathsaid partition and slidable therefrom to close the bottom of a compartment, whereby the pas-` sage of air through said compartment may be controlled, and a lever operablefrom the front of said stoker for vshifting said mem` partit-ions lyingtsome distance beneath they bottom of said .upper part, andbeing flat ber;

20; Alstoker comprising a continuous chainI grate,a series oia partitions in the space beneatlrthe upper part of said grate, dividing saidrspace into a Vserieso't compartments, av

longitudinal ash support spaced a distance below each side edge of the upperfportionl of the. grate, being flat on top and adapted Vtofsupport ashes thereonrto cooperate with the side edges of said grate to seal the. ends of said compartments, furnace walls spaced a distance 'from the side edges of the upper portion of thegrate, forming spaces to leed ashes onto said longitudinalash supports, means forming air spaces at opposite sides ofthe Stoker, between the outer sides of the stoker and the inner sides of the furnace walls, u-pstaiiding means to prevent the s shes on-said longitudinalA supports from falling into "saidair spaces, spaced outwardly a distance Vfroml the side edges oi the upper part ofthe grate, said partitions lying some dis-v tance beneath the bottom oi' said upper part, and being-flat on top and adapted'to support ashes on their top portions to cooperate with said upper ypartl to .prevent passagev et' air from one compartment to the next, rails to support theupper part oit the grate a distance above said partitionsand longitudinal ash supports, upstandiiig means' on the edge of one or more ot' saidpartitions between..

said rails to prevent the ashes thereon from falling into said compartments, longitudi-V nal members engaging the ends of said parti-v tions and torining supports for said longitudinalash supports, so' thatv alll ofy the ashes said compartnient'mayl be controlled, eachpartition beingV Vwider than said slidable member so as. to permit the latter to be withdrawn thereunder.. i .i

21.A Stoker comprising a. continuous chain grate, a series of partitions .in .thef space beneath the upper part oft saidgrate,.- dividing saidspa'ce into .a series of.' coinsupport partments, a longitudinal ashv spaced a distance below each sideof tliexupper` portion of the grate, being flat on. top and adapted to 'support'ashes thereon to cooperate with the side vedges of said grate toseal. the ends of said compartments, furnaceV walls spaced a distancenfrom .the side edges.

of ythe upper portion of the grate', formingl spaces to feed ashes onto. saidi.longitndinal;v ash supports, means forming .air .spaces at.:

opposite sides of the s toker, .between the outer sides of the stolzer/and. the inner' sides .of the furnace walls, up'standing means Atov prevent the ashes on said longitudinal supports from falling .into said air spaces,l

spaced outwardly a distance trointhe side edges o/tfthexupper parttof the grate, said on'ltop yand adapted to support ashes. ontheir top portions to cooperate with said upper part to prevent `passage of air Vfrom' one compartment to the. next, railsv to: support the upper pai-t of the' ygrate a distance. 'above partitions andl lonvnr gitudinal ash supports, upstanding vmeans on' the edge. ot one or more 'of saidpartitions between said rails to'. prevent the ashes thereon from fallingv into said com-r partments, means forming` anasli cavity at tlie outervside ot' each longitudinal ash sup port, Vand a horizontally disposed 'member slidable` into positionr beneath said partition and slidablefthere't'rom Vto close the bottoml of a compartment whereby thepassage of airtliroughsaid compartment may be controlled, each partition being` wider than said slidable member so asto permit the latter to be withdrawn there-under, that edge otsaid .partition under which the slidable member moves lying closelyl adjacent thereto so to scrape 'oil any ash accumulated thereon as said slidable member is retracted.

22. A stoker comprising a continuous chain grate, a series ot'partitions inthe space beneath the upper part of said grate, dividing said space into a series of come partments, a longitudinal ash support spaced a distance below each side edge oi' the upper portion of the grate, being iat on top and i adapted to support ashes thereon to cooperate with the sider edges oi said grate to seal the ends of said compartment@furnace walls spaced a distance `from the side edges ofthe upper portion oi the grate, toi-ming spaces to feed ashes onto said longitudinal ash supports, means forming air spaces at opposite sides of thestoker, between the outer sides of the stoker and the inner sidesoi theV fur-v nace walls, upstanding means toprevent the ashes on i said longitudinal supports Jfrom falling into said air spaces, spaced outwardly a distance from the side edges of the upper part of the grate, said partitions lying some distance beneath the bottom of said upper part, and being flat on top and adapted to support ashes on their top portions to cooperate with said upper part to prevent passage of air from one lcompartment to the next, rails to support the upperpart of the grate a distance above saidvpartitions and longitudinal ash supports, upstanding means on the edge of one or more oi` said partitions between said rails to prevent the ashes thereon from falling into said compartments, means tor supporting said longitudinal ash supports in position to support the ashes thereon in the same plane as the ashes on said partition, so that the entire ash sealis integral and rectangular and has transverse Vopenings forming the tops of said 1compartments, and a member slidable into position beneath said partition and slidable .there-v from to close the bottom of a compartment whereby the passage of air throughv said compartment may be controlled, said'slidable member being adapted when closed to catch ashes sifting through the upper part oi' said grate to further seal the same'.

A 23. A stoker comprising a continuous chain grate, a series of partitions inthe space beneath the'upper part of said grate,ldivid. ing said space into a series of compartments,

a longitudinal ash support spaced Va dis-l tance below each side-of the upper portion of the grate, being flat" on top and'adapted to .support ashes thereon to cooperate with the side edges of said grate to seal the ends ci said compartments, furnace walls"V spaced a distance from the' side vedges of the-upper portion of the grate, forming spaces to feed ashes onto said longitudinal ash supports, nic-ans forming air spaces at opposite sides ot' the Stoker, between the outer sides rof the Stoker and the inner sides of the urnaceg walls, upstanding means to prevent the ashes on said longitudinal supports trom falling into said air spaces, spaced outwardly a distance from the side edges of the upper part ments, but in which said upward passage of of the grate, said partitions lying-'some distance beneath the bottom oi 'said upperpart,

and being 'liat on top and adaptedtosupport ashes on their topl portions to cooperate with saidv upper partto preventpassage of air from one compartment to the next, rails j to support the upper'part of the'V grate a distance above said partitions and longif, tudinal ash supports, upstanding means on the edge of one ormoreot said. partitions between said rails to prevent the ashes thereon from falling into said compartments, means Jforming an ash cavity at the outer side ot each longitudinal ash support', anda horizontally disposed member slidable vinto position' beneath said partition and slidable therefrom to close the Vbot-tom of a. compart- I ment whereby'the passage of air through said compartment `may be controlled, each partition being wider. than 'said slidable member so as to permit tlielatter to be `withdrawn thereunder, that edge o said partition under which the slidab e member movesy lying closely adjacent thereto so as to scrape structure, whereby air might pass upwardly4 in each vertical spaceand into said compartairis prevented by the ashes which accumulate in vsaid ash cavity ateach sideof the grate.

24. chain grate, a series of partitions-in the- A stoker vcomprising a continuous i 100 space beneath the upper part of said grate, 'I

dividing, said 'space into a series ,of compartments, alongitudinal ashsupport spaced a distance below each side edge of theupper *portion ofthe grate, beingiflatxontop and adapted to support ashes thereon to cooperate -with'the side edges of said grate to seal the ends of said compartments, .urnacefwa-lls spaced a distance v:from the side edges-of the Y upper portionof the grate, forming spaces to teed ashes onto said longitudinal, ash vsupiio ports, means forming air spacesl at opposite sides of the Stoker, between the outer sides yof thel stoker and the inner sides oithe furnace walls, upstanding means to prevent'the ashes jon saidlongitudinal supports vroinfalling -into said air spaces, spaced outwardly a dis- Y tance from the side edges of the upper part of the grate, said partitions lying some dis-V tance beneath `the bottom 'of said upper part,

.and being vflat on top and adapted to support ashes on their'top portions to `cooperate with said upper part toprevent passage ot air from one compartment to the next, rails to support the upper part of the grate'ak dis- 125 i Y' tance above said partitions and'longitudinal j Y ash supports, upstanding means onthe edge ot' one or more of said ypartitions between y said rails to prevent' the ashes Vth'ereon'from falling into said compartment, means l'for 'Y tangular and :has transverse-openingsforming the topsof said compartments, and a member slidable into position beneath said partition and sliclable therefromto olosevthe bottom of` a. compartment'wh'ereby thevr pas'- lOlsage-ot' air ythrough said compartmentmay be controlled,y said slidable member beingv adaptecl'when closedto catch ashessiftingthrongh the'upper part olf-said grateto furthere. seal thev same, and means ormingav vertical air space at each slcleof the Stoker-1 structure, whereby air might passupwarclly 1n each' vertical space and into said compartn'ients, but which upward passage of the air 1s prevented by the ashes which accumu-y late on the longitudinalv ash support below 2U' eachsicleedge of the grate.

GHAUNCEY L. o. MAGEE;