US903131A - Stoker. - Google Patents

Description

T. V. ELLIOTT.

STOKER. APPLICATION FILED DEC. 8, 1904. RENEWED MAR. 13, 1908.

Patgnted Nov. 3, 1908.

' a SHEETS-SHEET 1 nwmrok WITNESSES:

- maddz'ow ZZZZLIOZQY ATTORNEYS T. V. ELLIOTT.

STOKER. APPLICATION FILED DEC. 8, 1904. RENEWED MAR. 13, 1908.

903 131. Patented NOV.3,1908. s SHEETS-SHEET z.

ATTORNEYS T. V. ELLIOTT.

. STOKER. I APPLIOATION-IILBD DEO.8, 1904. RENEWED MAR. 13, 1908. I 903,181. Patented Nov. 3, 1908;

3 SHEETS-SHEET 3.

' ATTORNEYS THADDIOUS V. ELLIOTT, OF NEW YORK, N. Y., ASSIGNOR TO MARIEA ELLIOTT, F FLAT BUSH, NEW YORK.

'sronnn.

Specification of Letters Patent.

Patented Nov. 3, ices.

Application filed December 8, 190e, Serial n5. 235,942. Renewed March 13, 1908. Serial No. 420,802.

To all whom it may concern.

Be it known that I, THADDIOUS V. ELLIOTT, a citizen of the UnitedStates, residing in the city of New York, Flatbush, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and 1mproved Stoker, of which the following is a full, clear, and exact description.

The object of the invention-is to provide a new and improved stoker for automatically feeding coal and like fuel to a furnace, to ansponding parts in all the views.

Figure 1 is a longitudinal sectional elevation of a boiler furnace provided With the improvement, the section being on the line 1-1 of Fig. 2; Fig. 2 is a front elevation of the same; Fig. 3 is a transverse section of the same, on the line 3 3 of Fig. 1; Fig. 4: is an enlarged sectional plan view of the improvement, the section. being on. the line 4-4 of Fig; 5; Fig. 5 is a sectional side elevation of the same, on the line 5-5 of Fig. 4; Fig. 6 is a similar View of the same, on the line 6-6 of Fig. 4; Fig. 7 is alike view of the same, on the line 77 of Fig. 4 Fig. 8 is an enlarged plan View of a portion of the grate, Fig. 9 is a transverse section of the same and part of the means for shaking the grate bars; and Fig. 10 is an enlarged transverse section of part of the mechanism for shaking the grate bars.

The furnace A on Which the improved formed in the bottom of the tubular member E, the said openings leading into the casings D and D, so that thecoal is engaged by revolving brushes 0 and C and orced by the latter through openings A. formed in the front A into the firebox and onto the topof the grate sections B and B for the fuel to be burned on the said grate sections.

in order to control the amount of fuel passing through the sets of openings E and E", suitable cut-off slides G are provided,

mounted on the under side of the bottom of the tubular member E, provided With handles G, adapted. to be taken hold of by the operator to move the cut-off slides G transversely, to 0 en the openings E and E more or less, to al ow more or less coal to fall from the tubular member E into the casings D and D. The handles G can be reached by the operator inserting the hand through openings D formed in the casings D and D and normally closed by suitable hinged doors D", as plainly indicated in Figs. 1, 2, 5, 6 and 7. The shaft E of the wheel E? is provided with a gear wheel H, in mesh with a gear Wheel H secured on a vertically disposed shaft H journaled in suitable bearings and carrying a worm wheel'H in mesh with a Worm li fastened on the main shaft 1, extendingtransversely on the front A of the boiler furnace, the said shaft being provided i With a pulley I, connected by a belt with stoker is applied is provided in its firebox i with a grate B, made V-shaped in cross sec-v tion, to provide inclined sides or sections B f v i tion to the WOIlIl Wheel H shaft H and and. B onto which the fuel, such as coal in a divided state, is scattered by the force of rcvolving brushes C and C arranged 1n casings D, D held on the outside of the front A of I the furnace, the fuel being fed to the sail casother machinery for imparting rotary n otionto the said shaft I. When this shaft I is rotated, the worm H imparts a rotary mo- Wheel E to rotate,- so that a continuous traveling motion is given to the endless ings D and D and thebrushes C and C by a 1 cable or chain it, to cause the disks E to delivery device E, receiving the coal from a 1 push the coal to the openings E and It)",

hopper F, the aid delivery device E being through which the fuel drops into the casings l) and D, to be brushed by the brushes C and Q throughthe openings A. onto the grate sections B and B The brushes and C aresecured on the shaft 1, which is rotated at a comparatively high rate of speed, so that the rotation of the brushes; is

formed or secure at the ends of each of the grate bars 13, preferably of the shape shown in Fi 8 and ada )ted to rock, so as to agitate the burning'uel on the grate bars and to cause the same to gradually slip downthe grate bars toward the a ex of the grate, the burned-out material being finally removed from the apex of the grate by the use of dumping bars B", hereinafter more fully describe 1 Each ofthe grate bars B is provided with openings for the ready passage of the air, so

as to insure complete combustion of the fuelon the said grate bars.- Eachroi the grate bars B is provided With a dependim arm 13, carrying a pinjB and the sever-alpine of one grate section: B. or B engage notches J cutQIin a bar J, piv'otally connected byalinkd With'an arm J attached to a longitudinally extending shaft J journaled in suitable bearin s on the corresponding frame B (see Fig. 9 The outer end of the shaft-J4 extends through the'front A of the furnace and on the outer end of the said shaft issecured an arm J (see Fig. 2), con nected with the eccentric rod J" of an eccentrio J mounted to rotate loosely on a shaft K, carrying the corresponding dumping bar B above referred to.

The disk of each eccentric J is secured or formed on a worm wheel L (see Figs. 2 and 5), in mesh with a worm L", secured one vertically disposed shaft N, provided at its upper end with a gear Wheel N, in mesh with an internal gear wheel Q, formed on a wheel 0, havin its peripheral face provided with a Worm w eel O in mesh with a Worm 0 secured on the main shaft 1. i l/hen the latter is rotated, the Worm O imiarts a rotarymotion to the worm Wheel 2 and the wheel 0, so that the internal gear wheel 0 thereof imparts a rotary motion to the gear wheel N and consequently to the shaitN, r which 111 turn rotates by its worm wheel L the worm Wheels L, meshing with the worm wheel on opposite sides thereof. The. worm wheels L, on account of being secured to the corresponding disks of the eccentrics J, cause the eccentric rods J to impart a swinging motion to the arms J, to rock the shafted, whereby the arms J ,'l inls 5 bars J, pins'B and arms B impart-a rocking motion to the grate bars B to agitate the burning fuel thereon and cause the same to rate sections ismounted on a frame B 118N111 bearings for trunnions 15* are B at the apex portion of the grate sections B and B of the rate B.

In order to periodica lly turn the dumping barsld of the grate sections B and. E the following device-isprovided: Normally the bars B are held in a closed positi.on,-as shown in. Fig. 3, by the action of a Wei ht K hung on an arm K de ending from t e shaft K of a dumping bar 0n the shaft K is secured an. upwardly extending arm K, on which is fulcrulneda link K rovided on its free end with a projecting in adapted to be engftged by a similar lug i on. a sprocket chain. 7

sponding eccentric J ,.so as to rotate with the said eccentric disk, the said. sprocket chain If also passing over idler sprocket wheels K, mounted to rotate loosely on the shafts J. When the stoker is in action, a rotary motion is given to the worm wheel L, the disk of the eccentric J and the sprocket .Wheel K and then the latter imparts a trav passing over a sprocket wheel K fastened to the hub of the disk. for the cone radually work downward to the dumping As the arm K assumes an angular'position, it

is evident that the lu K gradually moves out of engagement wit the lug K and consequently the shaft K is rocked back to its normal osition by the action of the weight 15., so t. at the dumping bar BF moves back into a closed position after the clinhers or spent material is dumped. The ashes falling from the rocking grate bars B down into the ash pit finally reach the inclined bottoms P and P ofthesaid ash pit, and the ashes are scraped down the inclined bottoms by scrapers Q onto a conveyor it of spiral shape, mountedto turn in the corresponding'casmg P into which lead the lower ends of the bottoms l and it.

The scrapers Q are in the form of longitudinal bars secured to sprocket chains Q passing over sprocket wheels Q and Q, (see Fig 3), the sprocket Wheels Q being socured on longitudinally extendingshafts (2,, each of which passes with its outer" end through the furnace front A .to-the outside thereof, and on the outer-end of this shaft tf is secured a Worm wheel in mesh with a Worm Q" secured on the shaft driven from the shaft I by the gearing above described. Thus, when the shaft'h is rotated, the shafts Q driven and consequently thesprochet chains Q, to cause the scrapers Q to scrape the ashes down the inclined bottoms l? and 1? into the casing P and onto t he spiral conveycr it, which conveys the ashes out of the furnace at one end thereof. The chnhcrs see, 1 er.

and other spent material dumped by the dumping bars B also fall onto the conveyor the lower end of the shaft N, so that when the latter is rotated, a rotary motion is given to the conveyer R, for carrying the ashes and cinders out of the furnace at one end thereof. From the foregoing it will be seen that when the shaft I is rotatedat a hi "11 rate of speed, then the brushes C and are revolved at the samespeed, to forcibly scatter the coal onto the grate bars B of the grate sections B and B and at the same time a traveling motion is given to the endless ca ble or chain E", so that the disks E7 continually feed coal to the said. brushes by way of the openings E and E. i 1

By connecting the main shaft I with the vertical shaft N in. the manner described, a slow motion is given to the said shaft N, which in turn actuates the rocking grate bars B so that the fuel is continually agitated, to insure a uniform and, complete combustion of the fuel. The shaft N also drives the scrapers Q, to cause the ashes .to be carried to the conveyor R, and the dumping .bars B are periodically actuated, to dump the spent material onto the conveyer, for the latter to carry the spent material off together with the ashes, as previously explained.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l'. A stoker comprising the following instrumentalities in combination, viz: afuel sup ply, a fuel conveyer for conveying the fuel "from the said supply and delivering it to a lace of discharge, a delivery device for movmg the fuel from the said place of discharge onto the grate, a grate having movable grate bars, an ash remover, and. means for simultaneously actuating the fuel conveyor, the de-= livery device, the grate bars, and the ash remover.

2. A stoker, comprising a hopper, a fuel conveyor for removing the fuel from the hopper and delivering it to a place of discharge, a delivery device for delivering the fuel onto the grate, a grate having movable grate bars, an ash remover under the grate bars, an ash conveyor for carrying off the ashes delivered thereto by the ash remover, and means for simultamously actuating the fuel conveyer, the delivery device, the grate bars, the ash. remover and the ash conveyer.

3. ll stoker comprising the following instrumentalities in combination, namely: a hopper, an endless fuel conveyer for removing the fuel from the hopper, revolving brushes for brushing the fuel received from the conveyer onto the grate, a grate having movable grate bars, an ash-remover under the grate bars, an ash-conveyer for carrying off the ashes and into which delivers'the'said ashremover, and means for simultaneously actuating the said fuel conveyer, the said brushes, the said grate bars, the said ash-remover and the said ash-conveyer.

i. In a Stoker, the combination with a furnace, and its grate, of brush casingsi on the front of the furnace and opening into the same, one at eachside of the longitudinal center of the grate, a revolving brush in each casing for feeding fuel onto the grate, a casing above the brush casings and having tubular members, one of which is provided with valved o enings in its bottom opening into the brusfi casings, and an endless fuel conveyor in the tubular members of the said casing for delivering fuel to the brushes.

5. In a stoker, the combination with a furnace and its grate, of a brush casing on the front of the furnace and opening into the.

same, a brush in the casing for feeding fuel onto the grate, a conveyer casing extending horizontally along the front of the furnace above the brush. casing and having tubular members, one of which communicates through an opening in its bottom with the brush casing, anv endless conveyor in the conveyor casing and traveling through the tubular mem bers thereof, and means for operating the conveyor from the brush operating means.

6. In a Stoker, the combination with a furnace and a grate, of brush casings on the front of the furnaceand opening into the same, one at each side of the center of the grate, a revolving brush in each casing for feeding the fuel onto the sides of the grate, the brushes being mounted on a common shaft, a casing'having openings leading into the brush casings, a fuel conveyer in the said casing, and means for operating the conveyer from the shaft of the brushes.

7. In a Stoker, the combination with. a furnace, of brush casings on the outside of the furnace and opening into the same, a revolving brush in each casing, the brushes being on a common shaft, a casing above the brush casings and having tubular members in the bottom of one of which are openings leading to the brush casings, an endless fuel conveyer in. the tubular nie jibers of the casing, a hopper having chutes opening into the tubular members of the. said casing, and means for. operating the conveyor from the shaft of the brushes.

8. In a stoker, the combination with a furnace, of brush casings on the outside of the furnace and opening into the same, a revolving brush in each casing, a casing above the brush casings and opening into the said brush casings, an endless oonveyer in the casing above the brush casings for feeding the fuel to the brush casings, means for operbelow the grete, e eonveycr for removing the ashes delivered thereto by the scrapers, and means for simultaneously cperating the rocking members of the grate, the brush,the fuel conveyer and the ash scrapers and conveyer. 1 {p 10. In it stoker, the combination with e; furnace, of a revolving brush for feeding fuel into the furnace, e feed device for feeding fuel to the brush, means for operating the feed device from the brush shaft, e gretehaving rocking grete'bers and dumping hers, means for operating the grate bars from-the brush shaft, and, means for operating the dumping hers from the grate be]? operating means. 11,111 a Stoker, the combination with a furnace, of 'a revolving brush for feeding" the fu el into the furnace, e feed device for feeding fuel to the brush, means for operating the feed device from the crush shaft, e grate having rocking grate hers and dumping hers, means for operating the grate bars fronn'the brush shaft, end'meens for periodically operating the dumping bars from the grate bar operating means.

-12. In a Stoker, the-combination with a furnace, of arevolving brush for feeding fuel to the furnace, a feed device for feeding fuel to the brush, "meens ior 'eneieting the'feed device froin the hrash-shaft, e 'grete having rocking rate bars and durn ing bars, a erticel she t,..gearing-hetween he e per end of the shaft end the brush shaft, mec enism. between the vertical shaft and the grate here for rocking the same, and mechanism for periodically -ope rating the dum ing bars from the grate bar operating mec anism.

. 13. In aigr ate the combination with a furuses, of a revolving brush for-feeding fuel to the furnace, n'feeddevice for feeding fuel to Y thebinshjmeens for ogerating the feed de- Vice from the brush s aft, a grate having rocking grate bars and dumping bars, a ver- :tic'el sheft, gearing between the upper end of the said shaft end the brush shaft, mechanism between theverticel shaft end the grate- 'bers-forzrqcking the grate bars, mechanism for eriodicall operating the dumping bars from the grate bar operating means, an ash remover below the grate, means for opera't ing'the'esh;1'em0'ver from the vertical shaft, an ashconv'eyer, and means for onerating the said conveyer from the vertical shaft.

In testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses. I

I THADDIQUS V. ELLIOTT,

- Witnesses;

Tnno. G. 'HosTEn, EVERARD BOLTON MARSHALL.

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