US1484638A - Stoker - Google Patents

Description

Feb. 26,- 1924. 11,484,638,

J. S. S. FULTON STOKER Filed March 1,5, 14920 4 sheets-sheet 1 STOKER Filed March l5. 1920 4 Sheets-Sheet 2 Feb 25 w24. www@ J. s. Vs. FULTQN STOKER Feb. 26 .1924. Y 11,484,633

J. S. S. FULTON Filed March 15. 1920 4 Sheets-Sheet 4 Patented Feb. 26, 1924.

carre si' rs er JOHN s'. s. FULTON, or'orrrcaso, rumors sToKnn.

Application filed March 15, 1920. Serial Noi. 365,934.

To (1N 1/7102/1.. t may concern Be it known that l, Join: S. S. FULTON. a citizen ot the United States, residing at Chicago, in the county oi' Cook and State' ot Illinois. have invented certain new and use'ful'lmprovements in Stokers7 olf which the following is a description. Y

My invention belongs to that general class oi devices known as stokers. and particularly to the chain or traveling grate type of mechanical Stoker inY which the fuel is carried from a hopper located at one end of 'the combustion chamber by the traveling grate. YMy invention has among its objects the production Vof a device of the kind described which is simple. convenient. durable. reliable, efficient and satisfactory 'for use Wherever found applicable. It has particularly as an object, an improved travelingl gra-te construction and the supporting and driving means for the grate. Many other objects and :advantages of the construction herein shown and described Will be obvious to those skilled in the art from the disclosure herein made.

j To this end my invention consists in the novel constructiom arrangement and combination of parts herein shown anddescribed, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate `like'or corresponding parts,

Figure 1 'isla' vertical sectional vieiv through 'the rear or inner end of the grate mechanism; j

Figure 2V is a sectional vieiv taken sub stantially on line '2 2 of Fig. 1 or 3;

Figure 3 is. aV sectional vieiv taken substantially on line 3-3 of Figure 1;

Figure 4- is a sectional view taken substantially on line el-eto'f Figure FigureV 5 is a sectionalview at the front end of the grate; j

'Figure 6 `is a perspective view'ofone of the links for carrying and connecting the various grate unitsgrand j l Figure 7 is a sectional view takenv substantially on line 7-7 of Figure 5.

Y"lhe'present invention is in the nature ot an improvement on the stoker illustrated in myUnited States Letters Patent No. 1.285.

6715v `Referring to the drawings. there is provided 'afstoker grate frame 8, 9. 10and 4S of suitable size. shape and material. In the'construction shown. the trame vis pro- 'the combustion chamber as desired.

ever. usually at least tivo are desired.

vidcd'u'ith wheels 11 and mounted on tracks l2. arranged in the foundation 13 so that the stoker mayY be moved into and out ot in Figures 1% the inner end ot the stoker is shown. the outer end being'illustratcd in Figures a and 7. The traine ispreierz-ibljY constructed to lit between the side Walls 111 ot the settingnthis being a detail. hou'- ever` forming no'part of the present inA vention. The stoker trarne is provided with supportingI rails 1 and 2, it being understood that there may be any number found necessary. this depending to a more or less ef;- tent upon the size ot the stokei'. yl-lov. The rails'l carry `the traveling grate, and ba as they carry the fuel into the .tui-nace or combustion chamber7 While the rails Q carry the returning portions ot the grate.

Referring to Figure 6, there are Nprovided the desirednuIn-ber of links,y preferably substantlally as shown 1n this figure, each or' Which consists of a body portion 16 provided with side flanges extended at 17 at Y.

one side or end, and withv 'flanges 18 at 'the opposite or advancing side. It Will be notedby referringto Figure 2 that ,the flanges 18 are spacedjinivardly so that when the links are assembled twofylanges 18 o'iLl one link will fit in betvveen tivoflflanges 1T of the other link adjacent to it at Vthat end. Each link carries a shaft or pin 19. which connects the adjacent link to it. and I'gpreferably mount rollers 20 at each side of the link onthe shaft 19, and a roller 21 at the inside between the flanges itl-1S oi the nextlink.V Y j' The links `16 carry I beams or equivalents` which. in the construction shown.V areV secured in place by brackets and bolts 2l. Carried by the I beams 22 are the 'grate bars 25 ot suitable size.

shape and material. In the preferred construction. the grate bars are arranged so that a bar onone linkextends between two adjacent bars on the next link. etc. ln other Words. they7 interengage or interuiesh so that all ot the spaces are substantiallyv closed between `the bars sufficient to prevent vthe fuel and ashes from 'falling through and yet open enough to let the air through. and the grate is flexible and in addition selicleaning, as will be hereinafter described.

The track lrails 1 maybe secured to the Harige 27 of the frame bar 10 in any suitthe i able manner, as may also the lower rail It may be mentioned that the lower' rail is preferably a Z bar, as indicated in Figure 3, and secured to the frame members 10 and to the parts of the frame bolts 28 or the equivalents for the purpose. In the construction illustrated, the track rails 2 are preferably braced against side strain or sagging. by the clamping members 29 which may be constructed with the part 30 so that it may be secured by the bolts 28 to the frame. As will be obvious, the rollers 2l traveling on the tracks l, support the upper side of the traveling grate, while the rollers 2O traveling on the return tracks 2 carry the returning part of the stoker. To guide parts from one rail to the other, I arrange suitable parts at the inner end of the stoker, which parts carry the traveling grate from one rail to the other and prevent its kinking or binding. IVhile the parts just referred to may be provided by extending the rails l downwardly over the end of the frame and the lower rails 2 upwardly, I generally prefer to provide separate parts, as shown, and

terminate the track rails adjacent the frame cross bar l0 as shown.V Referring particularly to Figures l and 4, I provide a ineinber 33 on the outer side of the cross beam 1t), the saine being' semi-circular in shape and correspoinling in cross section to the rail l. whereby the rollers 21 will follow around in the same manner as they travel on the rails l.. The parts 33 are secured in place in any suitable manner, as shown, by bolts 35 extending' through the cross bar l() and part34 ofthe bracket. In order to guide the rollers 20 onto'their supporting bars 2 at the lower side of the grate, I provide guiding members 37 which are preferably secured in place by the bolts 38 or equivalent means for the purpose on the beam 10 at each side of the member 33.'l As shown, the member 37 is provided with lip 39 engaging with the under side of the beam, and preventing any turning movement about the bolt 38. The two members 37 are made interchangeable. Each Vone is therefore provided with two' lips 39 and two bolt holes. The members 37 are each provided with a flange 40 which corresponds to the track 2 and engages the rollers 2() and guides them on to the track 2 without any break. It is believed that the operation will be obvious, As the traveling grate moves, the rollers 21 follow down on the part 33 until the weight of the grate causes the rollers 20 to engage withy the fiangcs 40 of the parts 37. The result is that the grate travels about the end from one track to the other substantially noiselessly and without jar and vibration. The ashes are dumped into the pit as the grate passes the end. The parts 33 and members 37, as shown, form substantially extensions tothe upper and lower track rails. This construction may be applied to either or both ends ofthe frame, if so desired, and suitable driving mechanisln employed in connection therewith. In

the machine illustrated, however, I have only employed this at the inner endof they frame. i

I prefer to supply adifferent mechanism at the other or driving end, which is preferably the outer end of the grate. Referring to Figures 5 and 7, 42 represents a fra-me bar corresponding with the cross beam or bar l0, the same carrying the tracks l and 2. The frame is provided with an extending part 48 which carries a shaft 45 extending' across fromv side to side ot the stoker. It willbe noted Vby referring to Figure 5 that the tracks 1 V and 2 are preferably extended beyond the cross beam 42 as indicated at 43 and 44, the end 43 being adjacent or slightly beyond the center of the shaft 45. rIhe shaft 45, in the construction shown, is larranged at the outer side of the front wall 46 of the combustion chamber and hopper 4T. I have shown shaft 45 arranged in a. bearing 5G adjustably carried by the parts 4S, 51` being a bolt or the equivalent passing through the part 49 of the frame and engaged by'a nut 52. This adjustable constructionv permits the desired tension to be put on the traveling grate, it being understood that any equivalent may be employed for the'purpose. To drive and support the grate and to carry the links and parts from the lower tracks to the upper tracks 1. I provide sprocket wheels 54 which ion maybe locked on the sha-ft bv keys 55 or v der the hopper to receive the fuel and carry the same into the combustion chamber. It will be particularly noted that this styleV of sprocket wheel is rexceediugly simple and that by engaging and carrying the rollers there is practically little if any friction between the parts. The result is that While the drive is positive and simple, the same operates in a very efficient manner. The shaft 45 may be driven in any suitable manner, not necessary to describe herein.

It will he noted that with the two ends of the stoker constructed. as shown and described, there is no lubrication necessary at the inner end of the stoken` as would be the case were there a rotating shaft, bearings and sprocket wheels and like mechanism for carrying the chain from the upper to the lower track. At the sprocket wheel end, in this (ase the drive shaft, the sprocket mechanisms are without the combustion chamber', and there is not much cha-nce for dust. and

grit to get in the bearings as there would be at the inner side. It will be also noted that with the type ot' chain and grate bar and supporting bars therefor illustrated, the grate bars are sub-stantially self-cleaning, that is to say, (see Figure l, as well as Figure 5) as the grates travel from the upper tothe lower or from the lower to the upper trac.ks,/they tend to wipe or shear off any parts of fuel that may stick to the adjacent t@grate bars.

Having thus described my invention, it is obvious that Various immaterial modiiications may be made in the same without departing from the spirit of my invention; hence I do not wish to be understood as limiting myseltl to the exact form, construction, arrangement and combination of parts herein shown and described or uses mentioned.

What l claim as new and desire to secure by Letters Patent is:

l. ln an automatic stoker, a frame, upper and lower guide tracks carried by said i ame, endless chains made up oi a plural-v ity o'l` links, tuel supporting mechanism mounted thereon, two sets of supporting rollers carried by each of said chains, one set of rollers operating on the upper guide tracks and the other setot rollers operating on the lower guide tracks, and means mounted on said trame arranged to cooperate with the first mentioned rollers and the second mentio-ned rollers for carrying links and rollers from the upper to the lower guide tracks.

2. In an automatic Stoker, a tra-me, upper and lower guide tracks carried by said frame, endless chains made up of a plurality oi links, fuel supporting mechanism mounted thereon, two sets of supporting rollers carried by each ot said chains, one set ot rollers operating on the upper guide tracks and the other set of rollers operating in the lower guide tracks, and track extensions mounted on said frame arranged to cooperate successively with the first mentioned rollers and the second mentioned rollers for carrying links and rollers from the upper to Ythe lower `guide tracks.

3. ln an automat-ic. Stoker, a frame, upper and lower guide tracks carried by said frame, endless chains made up of a plurality of links, fuel supporting mechanism carried by said links, two sets ot' supporting rollers carried by each of said chains, one set of rollers operating on the upper guide tracks, and the other set of rollers operating on the lower guide tracks, and means mounted on said trame to cooperate successively with said sets of rollers for carrying links and rollers from the upper tothe lower guide tracks, comp-rising downwardly curved tack extensions from the upper tracks and upwardly curved track extensions from the lower tracks.

ll. ln an automatic stoker, a frame, upper and lower guide tracks carried by said frame, endless chains, fuel sup-porting means carri-ed thereby. each chain made up of aplurality oi links, two sets of rollers carried by each ot' said chains, one set of rollers operating on the upper guide tracks and the other set operating' on the lower guidetracks, sprocket wheels for said chains arranged at one end ot' said frame and engaging' one set of rollers and cooperating guide tracks arranged at the opposite end ot said trame arranged to cooperate with said two sets of rollers carried by said chains and carrying' the rollers operated on thel upper guide tracks until the engagement with the other set ot rolle-rs arranged for operating` in the lower guide tracks.

ln a Stoker, a trame, guide tracks in the upper and lower portions of said frame, the upper guide trac-k curved downwardly at one end, and the lower guide tracks curved upwardly. one at each side of and adjacent said curved end ot' the upper track, a. plurality ot' connected links mo-vably mounted on said tracks. and grate mechanism carried by said links.

l'n testimony whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

JOHN S. S. FULTON. vWitnesses ROY W. HILL, BERTI-IA HARTMANN.

Images