US831177A

US831177A - Stoking-grate mechanism.

Info

Publication number: US831177A
Application number: US27270505A
Authority: US
Inventors: William Mcclave
Original assignee: Mcclave Brooks Co
Current assignee: MCCLAVE-BROOKS Co; Mcclave Brooks Co
Priority date: 1905-08-04
Filing date: 1905-08-04
Publication date: 1906-09-18
Anticipated expiration: 1923-09-18

Description

No. 881,177. PATENTED sEP'yJs, 19m

. W. MoGLAVE. STOKING GRATE MECHANISM.

APPLICATION FILED AUG. 4. 1905.

7 SHEETS-SHEET l f "a m 3 I I b v Wi [muses PATBNTED SEPT. 1'8, 1906.

W. MoGLAVE. STOKING GRATE MECHANISM.

APPIfIOATIOF FILED AUG.4, 1905.

7 SHEETS-SHEET 2.

' PATENTED SEPT, 18, 1906. w. MO'OLAVE. 1 STOKING GRATE MECHANISM.

APPLICATION FILED AUGA, 1905.

7 SHEETrF-SHEBT- 3.

nucutor N 8a1,177. PATBNTED SEPT. 18, 1906.

MoGLAVB. I STORING GRATE MECHANISM.

APPLICATION FILED AUGA, 1905.

7 SHEETS-SHEET 4.

, Jaw-M we" W,

PATENTED SEPT. 18, 1906.

w. MQOLAVE. STOKING GRATE MBGHANISM.

' APPLICATION FILED AUGA, 1906.

7 SHEETS-$33131 s.

3: we n l'o'i PATENTED SEPT. 18, 1906.

w. MoGLA VB. STOKING GRATE MECHANISM.

APPLICATION FILED AUG.4. 1905. I

7 SHEETS-SHEET 0v summon attain q,

No. 881,177. PATENTED SEPT. 18, 1906.

W. MOGLAVE.

STOKING GRATE MECHANISM.

AEPLIOATION FILED AUG.4.1905.

'7 SHEETS-SIIEET 7.

Unir nn I s i rer-Es PATENT ()FFICE.

WILLIAM M CCLAVE, OF SGRANION, PENNSYLVANIA, ASSIGNOR 'lO MoULAVE BROOKS COMPANY, A CORPORATION OF PENNSYLVANIA.

STOKING-GRATE MECHANISM;

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed August 4, 1905. Serial No 272.706.

To (Z7, whom it 'ITb/bl/ concern:

Be it known that l, l'VILhlAM MCCLAVE, a citizen of the United States, residing at Scranton, in'the county of Lackawanna and State of PtiilllS:\ 'lV:ll1ltl, have irvented certain new and useful IHIPI'OVOIDtlliS in Stole ingGr'atc Mechanism: and I do hereby de clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in stroking-grate mechanisms for furnaces; and it is the object of the invention to provide a grate-surface which is so constructed that small or fine fuels, as well as the larger fuels, may be used thereon and gradually fed down the grate-surface, the bars of the grate being moved at suitable periods or intervals or continuously, if desired, to lift and push the fuel at a proper speed toward the lower end of the grate. v

With. these. and other objects in view the invention eon'iprises certain novel constructions, comhiaations, and arrangements of parts, as will be hereinafter fully described and claimed.

In the accon'ipanying drawings, Figures 1 and .1 are vertical sectional views of a grate mechanism constructed in accordance With the present invention, Fig. 1? being a continuation of Fig. 1 upon a second sheet. Fig.

2 is an ei'ilarged sectional view through a portionof the said grate mechanism, showing some of the bars of the grate-surface and the intermediate space-filling bars. Fig. 3 is a similar view, but showing one of the bars in its upwardly-rocl d position, as when lifting and feeding the coal down the grate-surface. Fig. 4 is a top plan view of a portion of the grate-surface looking at the same as if its upper surface occupied a horizontal plane. Fig. 5 an elevation of a portion of one of the space-filling bars at the upper edge of the grate adjacent to the inner edge of the deadplate. Fig. 6 is a. rear elevation of a portion of one of the intermediate filler-bars mounted between the movable grat:ebars of the grate. Fig. 7 is a similar view of one of the rocking or movable grate-bars. Fig. 8 is a transverse sectional view of the grate mechanism, showing the same made up of three gratesections and illustrating the manner of making the bars of the sections move simultaneously. Fig. 9 is a detail end elevation of one of the. rocking grate-bars withoutcaps. Fig. 10 is a detail cross sectional view through the body portion of a rocking grate-bar and looking toward one of the lugs by which the bars of different grate-sections are joined. Fig. 11 is a sectional view similar to Fig. 'l, but showing the means for securing a differential movement .in the rocking of the gratebars secured to the furnace-front. Fig. 12 is a detail sectional view through a portion of the grate mechanism, showing a slightlymodified form of some of the intern'xediate caps of the grate-surface. Fig. 13 is a detail view showing an end elevation of the supporting-webs for the intermediate caps. Fig. 14 is a detail view showing a modiliedmannor of supporting the connecting-pins for the bars of the grate-sections.

The grate mechanism forming the subjectmattcr of this invention is so construct ed that a. grate-surfacc of moderate inclination may be used for"handli1'i g and causing the proper consumption of line fuels, and especially the exceedingly fine anthracite. fuels which it has been difficult heretofore to use in furnaces.

The gratessurfacie is-so constriwted that such fine fuels may be fed down the inclined surface thereof without the necessity of making the incline of such surface exceedingly steep, and the said grate-surface is also so constructed that the fine fuels employed cannot run through the grate-surface into the ash or f orCeddraft-pit below. i

V I have illustrated in the icctnnpanying drawings the preferable form for manufacturing the grate in carrying out the purpose of the present invention, and in such a grate there are employed two or more carrier-bars, as l and 2, upon the upper edge. of which are movably mounted the various bars and fuelsupporting surfaces which make up the stoking-gratc mechanism.

In the drawings 1. have designated the intcrn'lediate carrier-bars by the numeral 1, while I haveapplied the numeral 2 to the outer or extreme side carrier bars on the edge of the grate-surface. Of course it should be clearlyunderstood that the number of sect-ions in the grate-surface is not material to the invention, since one section may be employed or a plurality, in accordance with the size of IOC the furnace and the work which is required" necessary therefor would be made like the outer carrier oars 2, but when a plurality of grate-surfaces is embraced within the gratesurface the intermediate bars are made like those indicated by the numeral 1.

. stoking caps, W

The carrier-bars are supported in the furnace structure in any desired manner, their front ends resting upon supports or ledges 8, formed upon the inner face of the furnace front while the rear ends rest upon bearer bars or plates 5, mounted in'the bridge-Wall of the furnace. The upper ed es of the carrier-

bars

1 and 2 are provided at intervals with recesses or sockets forming journal-bearings 6 for receiving the stoking-grate bars. The portions of the carrier-bars between the journals 6 are preferably lowered, so as to tail away from proximity to the heat generated upon the furnace-surface. In this manner the greater portion of the carrier-bars are separated from the intense heat on the gratesurface by considerable space, and all tendency of warping'or bending the carrier-bars is thereby decreased.

Extending across the grate-surface and reachin from one carrier-bar to the other is a plura ty of movable or rocking fuel-, e ging bars 7, and these bars have joui'na s or trunnions 8 at each end which are adapted to fit into and find a bearing upon the journalbearings 6 of the carrier-bars.

Each of the movable grate-bars 7 is made up of a body portion having a series of elonated sockets 9, formed therein, and the said ody portions are formed with inwardlyturned cap enga ing edges 10 and 11. at their u per edges an 12 and 13 at their lower e ges for 6I1g8ilg the shanks of the fuelch will be hereinafter fully described. Extendin' below the socketed body portion of each ar is a rod or bar 14, which is connected at intervals b curved hangers 15 with the body portion of the bar. These rods or bars 14 are adapted to be engaged by the ends of bar-racking rods 16. The said rods extend forward in the grate mechanism and engage actuating means mounted in the front p .urt of the furnace struc ture for communicating a proper movement to the grate-bars in feeding the fuel down the inclined grate-surface.

The fuel-engaging and stoking portions of the said rocking grate-bars are made up of a series of caps 17, each of which is provided with a main stem 18, the said ste'n extending from the top or fuel-engaging portion of the cap downwardly to a point below the fuelsupporting portion of the cap, the lower portion of the stem being reduced in size and tapered to form socket-engaging shanks 19. The said shanks have a continuous tapcr in cross-sectlon from top to bottom, shown in I Fig. 2, and are made of considerable width in i front elevation, as shown in iihg. 7, the lower portions of said shanks being reduced inviidth, as clearly indicated in dotted lines in I said Fig. 7. Extending upon opposite sides l of the central stem 18 of each cap is a series of 1

parallel webs

20 and 21 forming fuel-support- 2 ing fingers with air-spaces between them. I The front ends of the said webs or fingers 20 are connected by a curved tie-plate 22, the outer surface of which is'curved, having the axis of the movement of the grate-bar as a center.

The fuel-supporting Webs orfingers 20 are made of considerable length, costs to fill the space between the stern portions of the caps and the adjacent bars of the grateseurface'.

The webs or fingers 21,, which reflect in an opposite direction from the we s or fnrgers 20, are preferably not oonneezteder tied rat their outer edges like the fingers o'rrvelirs 2G), and the said fingers or webs 21 are made comparatively short, as clearly illustrated in Figs. 1, 1, 2, 3, and def the-dmW-ings. 'The upper and rear edges of the Wehcm fie ens 21 are preferably curved, their curved e ges being struck from the center ed moyemesitrof the grate-bar as a center, and hecanseof such ccncentrlcity the rocking movement of the grate-bars will not operate to move the intermediate or filler'bars mounted between the adjacent rocking bars.

edges of the fingers on the u per rochmg grate-bar and the rear edge of t e dead-plate 23, and in order to fill this space and prevent the running through of fine ftuelsat this point a movable filler-bar or cap 27 is employed. A fixed transverse lower bar 24 is positioned below the filler-bar '27, tor supporting the same and extends from one canrier-bar to the other and is rigidly secured at its ends thereto. Each end of said fixed bar 24 is provided with downwardly-turned lugs or flanges 25, and a securing-bolt 26 is ssed through each of said 'lugs and the carr1er-bar adjacent thereto. U on the upper portion of said bar is mounte a movable fuel-engaging surface made u of a series of apertured bars or caps 27, which caps are preferably of the same width as the caps. of the rocking grate-bars. dz wnwardly-projecting lugs 28., clearly shown in Figs. 2 and 5, and the said lugs are pivotally connected by pivotpins 29 with upwardly-extending lugs or standards 30, formed upon the fixed bars 24. The said iixcd bars 24, supporting the filler-bars 27, are inclined with. respect to the grate surface, so that the pivoted bars or caps 27 rest normally against the curved surfaces of the tieplates 22 upon the adjacent rocking bars, and the space between said bars is thus always fillod. Although the edge of the caps 27, which rest against the tie-plates 29, may

A small space is left between the forward These caps 27 are formed with be made of solid material, 1 preferably form a series of recesses or parallel meshes 31 bars and reduce the temperature which mic-ht be otherwise attained at this point.

'..he intermediate filler-bars arranged between the adjacent rocking bars of the grat surface are preferably made up of 'fixed anle-bar portions 32, bolted to the carrier bars y bolts 33 and movable top or fuehcngz ging caps 34 and 35. The capsilel and 35 are also made, preferably, oii'mvidths corresponding with the width oi the movable grate-oar caps 17. Of these movable caps for the intermediate filler-bars the largest, 354, almostiill the space between onedno'vable or rocking bar and the adjacent one, and the caps 35 are comparatively small, being sullicient only to bridge the space between the lower edges of the large caps 34 and the caps-J 7'oi the next movab e bar.

In order to properly support the movable caps 34 and 35, upwardly-projeeting webs 36 are provided at suitable intervals upon th. upper edge of the fixed bar portion 32 and downwardly-extending lugs 37 on. the caps 34, and lugs on the caps 35 are phVOhtl-l y connected with the said webs 36 by pivot pins 39' and 40. The pivot-pins 39 of the caps 34 are situated at oints so nearly bej neath the rear edges of t is said caps 34 that gers or near the same.

their forward edges fall under the action of gravity toward the rear edges of the webs 2] rojecting from the caps 17 of thamovable ars. The body portion of each cap S tis made up o'fa series of downwardly-tapering webs or fingers 41, which are joined at the forward edge of the cap by tie portions 42,

which lie portions closely lit the edges of the webs 21. The rear of the said fingers or webs 41 are also joined ortied by a tie portion 43; arranged either at the rear edges of the lin-, The said rear edges of the said fingers project rcarwardly over the forward portionsof the adjaeentcaps 35.

I In using very fine fuels it is important to so form and mount the caps 34 that there shall be pracl ically no space between the forward edge of the snid caps and the edges of the webs 2'! on the adjacent bars. To insure a proper lift ing of lhcse parts, the caps 34, when lirst newly mounted in the grate structure, are prrmillezl to rest upon the webs 2i, and means is provided l' r arresting the wear bc twren ilxc p.1lts al'le' a worn or practically ground joint is lprmodwhore they touc The means employed for arresting such wear comprises stops or'dci'cnis (54, formed upon the capsupporling webs 36 of the liked bars 152. This structure is clearly illustrated in Figs. 12 and 13. in which it will be noticed that the webs 36 extend forwardly beneath the caps 34, as at 63, and carry at their forward ends the dctents The dctents til project laterally from the webs 36, so as to lie beneath the webs 37 of the caps 34. la this structure the said webs 37 are should cred at 65, so as to provide a projection (rapable of resting upon the detents 64. .lt will be readily understood that after the forward edges of the caps 34 are worn sidiieicntly in their engagement with the webs 21 to permit the shoulders to engage the detents 64 there will be no. further wear upon the parts. I do not wish to be understood as limiting myself to the use of the iii-tents 64, as the caps may be formed without such dctents, as illustrated in Figs. 2 and 3 of the drawings, the weight of the-caps holding them against the webs 2-1 of the adjacent rocking bars.

The caps 35 are provided with transverse body portions which are made comparatively edges of these body portions projceta series of downwardly-tapering fingers or webs 4,4, which. project beneath the overhanging rear edges of the caps 34-. The under or rear edge" of the said caps 35 are meshed, as at 45, so that air-spaces are left between the said caps and the adjacent curved tie-plates 22 of the rocking grate-bars, against which the said caps rest. The fixed body portion 32 of each intermediate lillerbar is preferably formed with a tapered end portion 46, as clearly seen in Fig. 4, which fits into a corresponding tapered recess or socket 47, formed in a projection 18, extending upwardly from the body portion of each carrier-bar. The securing belts or pins 33 are passed through laterally-projecting lugs 49, formed on the ends of the said lixed bar The tapered end projections 46 of the said bars prevent the tipping thereof, while the pins 33 lock the bars against vertical (llSIllzlCOIllOllh The movable caps 34 and 35 practically seal the spaces between the adjacent movable bars. This const ructicn perm itsot' the feed in g of very fine i'uels down the suriaceoi the grate without the chance of the same running through thegrate surl'ace and escaping consumption. The rear ends of the caps 34 are generally made to project slightly above the normal level of the grate-surface, as indicated in Fig. 2, and thus tend to prevent the rapid running of the fuel down the grate-surface, especially when the fuel is being positively fed down the said surface by the rocking of the movable gratwbnrs. The said pivoted caps 34 may, hmwvcrv be made level'wiih-the surface of the grate or may be made to project to a greater distance above the said level than shown in Fig. 2 without departingin the least from the spirit oi" the invention. The

tends fronronc carrier-bar to the other, se-

curing them fixedly with respect to each i o other. Below the tie-bar 50 I usually mount a rocking cut-out bar 51, which is so constructed as to be capable of cutting out ashes and clinkers at intervals and dumping them into the ash-pit below the grate. The said tie bar and the said rocking cut-out bar may be of any desired construction, and since these. bars form no material part of the present invention it'is not deemed necessary to specifically describe the same.

Returning now to the rocking grate-bars, which form an important feature of this invention, it should be pointed out that since the greater portion of the caps 17' project forwardly from thebody portions of the bars and the greatest weight supported by the bars is thus carried by the forward wall at its 4 upper edge and the rear wall at its lower edge the said forward wall is extended above the upper edge 11 of the rear wall. The upper edge of thesaid forward wall thus forms a strong abutment for lifting the weight resting upon the overhangirg portion of the caps 17 and, forces upwardly and backwardiy the fuel which is engaged by the rocking bars. The lower rear edge of the rockii'ig bars are also thickened and strengthened, as clearly illustrated in the sectional views in Figs. 1', 1*, 2, and'3.

As shown in' Fig. 7, the journals 8 project beyond the end of the body portion of the rocking grate-bars-,v and the end caps of the rocking bars are preferably made to project beyond the said journals and overhang the same, as well as a part of the space over the carrier-bar. As shown Fig. 7, the end cap upon the bar is made wider than the intermediate ca s, and the under side of the outer edge of sai cap is reduced in depth, as at 53, so as to accommodate the journal 8. .Wliere the end caps overhang the intermediate carrier-bars 1, (shown in Fig. '8,) the said end caps of said bars a proach each other, so as to leave only a slig it space, preferably equal to that between the adjacent caps on the i2.- termediate portions of the bars. Where the said end'jcaps overhang the outer carrier-bars 2 of a grate-surface, the caps approach the side walls of the furnace, so as to leave only a slight space, preferably about that equal to the space between the intermediate caps on the bars. In this manner the jourials of the bars are thoroughly protected by the end caps of the said bars, aiid 1 o greater spaces are forrred between the grate-sections than between the adjacent intermediate caps of the gra t e-bars.

As shown in Figs. 1 ill-(l l the grate-bars, which are movably mounted and which are used for stokiirg or feeding fuel down the grate-surface, are connected by the rods 16 with operating mechanism at the front of the fur? ace. The operatirg mechai'ism, as showi'i in said figures, may be made up of pivoted levers54, mounted inside the furnace-front I bolt in place.

and connected by means ofrods 55 with differential actuating means 56, mounted outside the furnace-front and capable of imparting movement to agreater or less extent, according to the adjustment, to the rocking bars inside the furnace. The structure thus illustrated is preferably like that shown and described by me in my Patent No. 689,827

the fuel-feeding bars of the furnace without departing from the spirit of the invention in the least.

As heretofore intimated, the grate-surface maybe made up of asingle grate-section or a plurality ofgrate-sections. When the gratesurface is made up of a plurality of grate-sections say, for instance, three, as shown in Fig. 8it is only necessary to impart mcvernent directly to one of said grate-sections, for the movement thus imparted thereto can be further imparted to the ad acent gratesections in a simple method and by simple I means, which will now be described. One of the gratesectionsas, for instance, the intermediate sectionmay be provided with Zdownwardly-projecting lugs 58, which project below the engaging rod. 14- and winch 1 are perforated, so that a bolt may be passed through said perforations. The adjacent grate-sections have one or more of their bars provided with a similar projecting lug, as 59, which is also perforated, anda connectingbolt is passed through the apertured hip; 59 and thence through a slot 61, formed in the intermediate carrier-bar 1, the bolt then passing through the apertures in the lugs 58. The inner end of said bolt may be engaged by any suitable locking "means, a cotter-pin 62 being shown in Fig. 8 for holding such The slot 61 in the carrier-bar is made concentricwith the center of move ment of the grate-bars which carry the lugs 58 and 59, so that the said bars may be rocked and the pin .or pins 60 carried therewith. It is necessary to provide a con: ot-

ing-pin 60 for each of the adjacent grate-sections, so that any moveiitent imparted to the various bars of the central section will likewise be communicated to the individual bars of the adjacent conrected sections. By providing two lugs 58 on o e of the bars a sufii cient rigidity is given to the pin 60 to move the adjacent bar positively in exact accordance with the bar carrying the said lugs. course a greater or less umber of lugs may be employed, if desired, Without depai ting from the spirit of the invention, By the use of these connecting-pins endings it is only necessary to impart movement directly to thebars of a single grate-section in order to operate all the bars of the whole grate-sun proper correspondence with each 14. without departing from thespirit of the invention.

Where the ends of the gratebars bridge the outer carrier-bars 2, the said earrier-bars are also provided with slots 66, similar to the slots 61, and short pins 67 are secured to the adjacent ends of the bars, the said pins 67 serving to prevent the rising of the bars from their journal-bearings.

1n employing a. stokingmrate surface like that above described the plane of the gratesurface is arranged usually with an incline of about twenty-five degrees. The fine fuels are fed "upon the upper end of the grate-surface from the fuel-feeding hopper in any desired manner, and-therocking grate-bars are then given a movement'at suitable intervals to tip their forward edges upwardly, as shown in Fig. 3, and thus force the fuel down the grate-surface. The mechanism which operates the rocking grate-bars can, as de scribed in my previous patents referred, to, be made to impart a slow movement or a rapid movement to the rocking grate-bars, asfound needhnl or desirable in feeding the burning fuels down the grate-surface. Because .of the lifting and downwardly-forcing power of the rocking bars claimed in the present invention the incline of the grate can be made less than'is generally required in stoking-grates of a similar character to that described in the present invention.

By'the construction of the grate the -lined portions of the carrier-bars and of the gratebars are dropped to a considerabledistance below the fuehbearing surface of the gratecaps and are thus protected from the extreme degreesof heat generated in the irebox of the furnace. Although the "filler-bars employed for closing the spaces between the movable bars are so formed that the fuel cannot run through between any of the arms, yet ample air-space atl'orded between adj acent bars by the arrangement of the webs or fingers for sullicient drui t to reach the burning fuel and alsotor so distributing the air Which passes through the grate-surface that the parts in. hontact with the lmrning fuels are protected in a large degree from extreme heat and are maintained at a reasonably cool teumernturc. The lil'e oi the "rate-bars is thus greatly increased over wh: it would be were the bars made ol a more solid conall.

Having thus fully described my iuven ti on, What I claim as new, and desire to secure by Letters Patent, 1s

1. An inclined stohinggrate mechanism,

comprising; a series of spaced movable gratebars, a series of tiller-bars l'or sealing the spaces between them against the running through of fuel and forming a substantially continuous surface, and, means for supporting the parts in proper relative position.

2. A stoking grate surface comprisin a series olspaced movable grate-bars, am a se ries of movable '[iller-lmrsontho same plane as the grate-bars resting against the movable grate-bars, the said movable filler-bars forming the sole fuel-surrporting means between the movable grate-bars.

3. A stoking-grate surface, oomprisiiu carrier'bars, rocking grate-bars journaled there on,' and fillerbars interposed between the rocking bars and having movable iuel-supporting caps for movably engaging the said rocking bars.

4. A etching-grate surface, comprising a plurality of rocking grate-bars and liller gratebars mounted between them having rigid supporting portionsand cap portions pivotally mounted on the supporting portions for filling the space between the said bars said cap portions in operationcontacting with said rocking grate-bars.

5. A etching-grate surface, comprising a plurality of rocking fuel-teeding bars, a lurality of filler-bars mounted between t rein having cap portions pivotally mounted on the supporting portions, the cap portions resting/against adjacent fuel-Feeding bars through the act-ion of gravity for sealing the spaces between the bars and preventing l'uels from running through the grate-surface.

6. A stoking-grate, comprising a lurality ol roching'grate-bars having i'uel sto ring portions extending well to one side ofthe body iortion of the bars, intermediate spade-fillin bars mounted between the rockin bars an normally impinge against said roc ring bars,

and means for rocking thesaid bars so as to lift the fuel-striking portionsthereof and force the said fuel down the grate-surface.

7. A l uel stoking grate, comprising carrier bars, rocking bars journale'd thereon having caps formed with curved surfaces, concentric with the res ective axesof movement of the bars, and fill er-bars in thesame plane as said. rocking bars arranged in the'spaces betweenthe rocking bars and having cap portions resting against the curved surface of said rocking bars.

8'. A lu rn ace-grate surfarre, com prising carrier-bars having journill-hearings m thiirupper edges, rocking gratod ars journalcd in said hearings and having Mel-supportingcaps provided with curved edges, and filler-bars mountbd' between said journaled bars, the said liller-bars having movabl caps resting fuels at the meeting edges of the bars.

. therefrom some of said caps extending for- -ward and others rearward from the support- Ward from thesupporting-bar against the adedge against the adjacent edge of a rocking uel-supporting Webs, curved tie-plates joinby gravity against the curved surface of the rocking bar. 7

9. A etching-grate surface comprising carrier-bars, rocking grate-bars journaled. thereon, intermediate bars having fixed portions secured to the carrier-bars and cap portions pivot all y mounted on the supporting portions of said fixed portions and each resting at one bar for preventing the runnin through of 10. A fuel-stoking-grate surface, for furnaces comprising a plurality of rocking gratebars, a deadplate at the upper end of the grate-surface and a filler-bar closing the space between said dead-plate and the u per rocking bar, said filler-bar having a ixed body portion and cap portions pivotally mounted on the supportingportions and extending upwardly therefrom. I 11. A stoking-grate mechanism, comprising a fuel-supporting surface formed with rigid portions a plurality of rocking gratebars, a sealing or filler bar mounted between the upper rocking bar and the adjacent rigid ortions of the fuel-supporting surface, said 4 l'erbar being made up of a fixed bar having upwardly-projecting lugs and pivotedcaps pivotally secured to said lugs.

v 12. A stoking-grate surface, comprising a plurality ofrocking grate-bars, a space-fill ng bar at the upper edge of the grate-surface having a fixed lower portion and a movable cap-portion pivoted thereto, the said cap portion having recesses in one surface, the said recessed surface resting against the adjacent rocking bar.

13. A stokinggrate surface, comprising a plurality of rocking bars suitably spaced apart, intermediate filler-bars mounted between them having pivoted caps extending ing-bar and engaging the adjacent movable surfaces of the rocking bars.

14. A furnace-stoking-grate surface, comprising a plurality of rocking stoking-bars, intermediate filler-bars having angle-iron fixed base portions and cap portions pivotally mounted on the"sup'porting portions, some of said caps extending toward and others rearj acent rocking grate-bars.

15. An inclined stoking-grate surface,comrising a plurality of rocking stoking-bars, intermediate filler-bars having pivoted fuelsupporting caps, the rear cap resting against the next lower rocking bar'and the forward cap overhanging the said rear cap and at its forward edge resting against the next forward rocking bar.

16. A stoking-grate surface having rocking ate-bars formed with forwardly-extending ing the ends of said Webs andintermediate l filler-bars having pivoted portions 'restingl against said curved tie-plates.

17. A striking-grate surface provided with' a plurality of rckinggrate-bars having forwardly and rearwardly extending fuel-supporting webs, and intermediate filler-bars having pivoted caps resting against the edges of the rearwardly-extending webs and preventing the running through of fuel at that point. l

18. A fuel-stoking-giate surface, compris ing a plurality of rocking bars having forwardly and rearwardly extending fuel-su porting webs, the forwardly extending. we s having curved connecting tie-plates, and intermediate filler-bars having forwardly and rearward 1y extending cap portions pivotally mounted on the supporting portions, the rearwardly-extending caps engaging the curved tie-plates of'the adjacent rocking bar while the forwardly-extending caps engage the edges of the rearwardly-extending. webs on the adjacent rocking bar.

19. A stol c-ing-grate mechanism,-compris-1- ing a plurality of rocking grate-bars having curved front and rear edges,v the said curvedv edges having the axis of movement of the I bars for their cente s, intermediate filler-bars having. front and rear cap portions pivotall y mounted in the supporting pertions resting againstthe adjacent curved surfaces of the rocking bars and preventing. fuel from. running through the spaces betweenthe bars.

20. A stoking-grate surface, comprising rocking grate-bars made up t'bodyportions and overhanging caps the said body portions having elongated sockets formed therein while the said caps are provided with broad tapering shanks extending into said sockets, journals at the ends of the body portions, carrier-bars for engaging said: journals and movably supporting the bars, and end caps having end projections reducedv in depth so as to overhang the journals andprotect the same from the consuming fuel on the grate surface. 1

21. A stoking-grate mechanism,-compris ing adjacent grate-sections, carrier-bars supporting the same, some of said bars arranged between the grate sections and having curved apertures formed therein, said gratesections comprising oppositely arranged rocking bars in each section, and arms mounted. upon each rocking bar, the rocking. bars ofone-section. having a plurality of such arms, while the rocking arms of the adjacent section have only. a single arm, pins rigidly secured to said bars and passing through the curved apertures in the carrier-bans for tying the rocking bars together, and' means" for driving one section, the connecting pins causingv the bars of the adjacent section. te-he also rocked therewith.

-22. A stoking-grate mechanism, comprising a fuel supporting and stoking surface IIO made up of a plurality of rocking grate-bars, filler-bars sealing the spaces bmwocn them for forming a continuous surfaetgfarnis (sonneoted with tho rocking bars for rocking them and moans mounted adjacent to the furnaowfront for imparting the same or a diflorontial movement to the said bars.

23. A stoking-grate mechanism, comprising carrier-bars, movable grate-bars journaled thereon, tiller-bars contacting with, said grate-bars for sealing the spaces between the movable bars, means connecting the movable bars with a feeding mtx-hanising mounted adjacent to the furnace-front, and means for imparting the movement of the bars from one grate-section to those of the adjacent nite-section.

23:. A stoklr grato surface comprising a plurality of gi'i-xtto soctions, and carrier-liars lor supporting (iUll grate-suction, said (tarrior liars living provided with apertures therein; said gratv-sot-tions comprising rooking-bars, projvt'ting arms svrured to each rocking bar, and nominating-pins extending through said aporturvs in the (warrior-bars for connecting the bars on the (:orrvsponding rocking bars to adjacent grate-sections, for

scouring a simultant-ous movement thereof. In testimony whorool l allix my signature in presence of two wit nosses.

WILLIAM MCCLAVE. Witi'msses:

(,AssELL Srnnmxcn, Ru'rn J. hlITCIlEIiL