US987834A - Mechanical stoker. - Google Patents

Description

Patented M21328, 1911.

A. R. SELDBN.

MECHANICAL STOKER.

APPLIGATION FILED FEB. 23, 1907.

Patented Mar. 28, 1911.

A. R. SBLDE N.

MECHANICAL STOKER.

APPLICATION rum) 213323.190?-v Patented Ma1128, 1911.

6 SHEETS-$HEBT 3.

EMVENTQR A. R. SELDEN. MECHANICAL STOKER APPLICATIONVPILED FEB, 23, 1907.

Patented Mar.28,1911.

6 SHEETS-SHEET4.

imam-r52 MRS QM A. R. SELDEN.

MECHANICAL STOKER. APPLICATION FILED FEB. 23, 1907.

. 987,834. Patented Mar. 28, 19:1

6 SHEETS-SHEET 5.-

ITNESSES: INVENTOR AQ- @ZZ K M 1W. v t I CV4 54% W "2%; 512 2;

A. R. SELDEN. MECHANICAL STOKBR, APPLICATION FILED r312. 23, 1907.

6 SHEETS-SHEET G.

ETNESSES:

Patented Mar. 28, 1911 PAT d l ARTHUR- B. SELIDEN, OF ROCHESTER, YORK.

MECHANICAL STOKER.

application filed February 23, 1907. Serial No. 359,900.

7 new and useful lmproven'ients iu h'lechanical Stol ers, of which the following is a. specifica tion.

'erful blast of air into said This invention relates to niecl'ianical stokers.

The object ofthc invention is to provide a Stoker Which will use an inferior grade of coal (usually. obtained in powdered form, or finely broken lumps), and which Will automatically spread the same evenly over the grates of an ordinary furnace, in small quantities, and at regular intervals.

The device is so constructed that it may be applied to, the ordinar type of boiler furnace Without changing the grates, or otherwise modifying it. and may be swung back out of the Way at any time, and hand firing substituted.

The Stoker consists of sixniain elements, viz: (1) the hopper, in which fuel is placed; (2) an'elevator, which carries the fuel in small. quantities, and at regular intervals dumps it into a discharge pipe; (3) a chute that delivers the fuel to the discharge spout;

an oscillatingjspout or nozzle which directs the fuel 'to dilleientparts of the furnace, and sosprca B it evenly over the grates; a blower, Whieh delivers a. powspout with the fuehthus fulfilling the dual function of assisting in carrying the fuel into the furnace.

and supporting its combustion; and (6) a motor to drive the blower, elevator, and other moving parts ct. the apparatus.

In the drawings: Figure l a front ol'cvation of the complete,apparatus; Fig. 2 is a side elevation looking from the right in Fig. I; Fig. 3 is a. cross-sect1on of the distribut-ing spout. on the line 3 3 of Fig. 2; Fig. 4 1s a sectional elevation on line 4-4 of Fig. l g 5 is a plan view of a section taken on line 55 of Fig. 2; Fig. (3 is a plan viewot' the complete apparatus; Fig. 7 is an enlarged front elevation oi? a' portion of the apparatus; Fig. 8 is a plan view of the same; and Fig. 9 is a left side elevation of the parts shown in Figs. 2 and S.

The elements of the machine, named which make up its Working parts are ported upon a rectangular Frame, is rigidly attacl'ied to a vertical shaft 1, supported in suitable bearings. Accordingly the machine can be swung; into position before the furnace and back out of the way. Without dlSCUlillF-Cllllg any of the arts, or otherwise disturbing; the driving connections. The rectangular frame is con1- posed of two horizontal members 2 and 3' and a connecting piece l. These, and also the shaft 1, are represented as constructed of iron pipe, held together by ordinary pipe fittings.

Specification of Letters Patent. patgnt tgd R133, 28, 19111,

through said spout are divergent, so that the blast of air from the blower is directed over the Whole fire box.

l'Vithiu the box 7 is a pipe or nozzle 10 (see Fig. 4), supported by a flange 11 on the top 1.2 of said box. Fuel, preferably coal in small lumps, or in powdered term,

is broughtdown into the nozzle-1O through a pipe 13. lwlechanisni is arranged to swing the said nozzle back and forth from side to side across the ends of the passages 8 and so to deliver the coal to each passage intum. The nozzle thus constitutes means for coir veying fuel from the fuel supply to said passages successively. The pipes 13 and (*3 are inclinedat an angle that carries the coal into the furnace with the momentumthat it acquires as it falls through these pipes. The air blast from the blower 5 assists in carrying the coal into the furnace, discharging it with considerable force. The diverging ends of the spout 9 spread it evenly across the grates, from side to side, While the air is delivered constantly to all of the passages 8 Provision is also made for distributing the coal along the grates from front to rear, and thisis done by mech-- the pipe buckets on a continuous chain 18, and the latter runs over sprockets on shafts 19 and 20. i The mechanism for oscillating the spout 9 and nozzle 10 is operated from a shaft 21 (see Figs. 7 and 9), which is driven directly bythe motor 5. Said shaft carries a worm 22, ei'igaging a worm wheel 23 on a transverse shaft 24 (Fig. 9). A crank 25 on the opposite end of this shaft is connected by a pitman 26 with aniextension or arm 27 on the spout 9. The latter is usually a single casting, and is pivoted on a pair'of horizontal trunnions 2 f As the shaft 24 rotates, the crank 25 and pitman 26 will cause the spout 9 to rock up 'and down on the trunnions 28 (see Fig. 4).

As the inner end of said spout rises, the stream of coal, which is blown through it, will be directed to therear of the furnace;

and when the opposite movement occurs, the

coal will fall nearer the front. I

A weight 29 (see Fig. 5), intended t nearly counterbalance the spout 9, is adjustably supported by an arm 30' on the opposite side of thespout from the arm 27. The latter is connected to the pitman' 26 by a pin 31 resting in a slot 32 insaid pitman, the pfrpose ofthe slot being to prevent breakage of the parts in case the spout 9 encounters an obstruction while moving down ward.

tical shaft 33 (see Fig. 7), driven bybevel gearing from the shaft 24- and supported in suitable bearings on the frame, has at its lower end a crank 34. A pitman 35' forms a connection to an arm 36 on thejtop of the.

give a longer or shorter movementto the nozzle 10 and spout 9, respectively.

In order to vary the proportion. of coal and air delivcred'to the furnace, adjustable means are provided for regulating the speed of the elevator. thus delivering a greater or less quantity of coal with a certain numberof cubic feet of air, while maintaining the speed of the blower constant. This elevator regulator coin n'iscs the driven shaft 21, a small frictlon-wln-cl 37 held"tnercon by a feather key, and a scrmv-spindle 38 parallel thereto engages a yoke 3.) which rests in aslot in said f :iou-wliecl. I Lahore-1110 shaft 21 is a vertical shaft =10. A bevel gear .1 on its upper end (ll'lftfl a shn-t,l.1orizoi ital shaft 42, from which a chain 13 To swing the nozzle 10 from side to side, i the following mechanism is provided: A V81" runs directly to; the elevator sprocket it)". On the lowerernl of the shaft 40 a friction disk it-frosting on the wheel 37, and driven therehv Uponturning the spindle 3S, thewheel 37 will be -moved toward. or away from the center of the disk 44, and the speed of the elevator will increase and decrease correspondingly as said wheel is moved.

Means for retaining the apparatus in its operative position before' the furnace, are also provided. For this purpose a roller 45 is set ina frame at the bottom of the pipe 1 (see Fig. 1-), andthe Whole weight of the entire apparatus is carried thereby when swung away from the furnace front. The roller rests on a floor-plate 16, which has an inclined portion on its upper side. When the roller is on the inclined face, as shown in Fig. 1, the apparatus is held tightly against the furnace-front, and considerable force is required to swing it around on the frame and carry part of the weight of the apparatus (Fig. 4). i

In order to control the quantity ofair fed to the furnace, an air pipe 50 (see Figs. 1 and 2).leads from the main air passage 6 to the outer atmosphere, and is'located in'a position to'direct the air into the ashdoor off the furnace if the latter is left open. Thisair tube .50 is a shunt to regulate the amount of air passing from the pipe 6 into the multi-passage pipe 8 and thence to the fire 'chambcn'i', and the amount of air shunted into the pipe 50-isregulated by a blast gate 51.

- The fact that, the top of the elevator, whence the coal falls into the box '2', is 10- when -in operative position cated'sonie distance abovesaid box, gives the coalsufiicient momentum to carry it well into the furnace even when the mininuun air blast is used. Thus, though the air blast contributes toward delivering the coal into the furnace, it is so assisted by the n omcn tum of the coal thatthe air blast may be varied at pleasure with reference to the air supply for eonilzustion, and without-regard to the delivery of the coal.

a I claim is I i. y

1. Ina mechanical stoker, the cbznbination. of a verticall'y-oscillating deflector, div1ded longitudinally into a plurality of. passagesfor the discharge of fuel into a furnaceymeans for discharging fuel through oscillating said deflector." Y

2., In a mechanical sloker, the combination of'a 81t1(51'll}'itis(fllllltlllg deflector, divided longitudinally into a plurality of passages.

.;for the.dis cl a1,'ge of fuel-into a furna e; at

said passages successively; and means for senses hopper for a fuel supply; and means for I conveying fuel from said hopper to an elevation, and thence discharging it into said passages in the deflector successively.

In a mechanical slicker, the combination of a' vcrtically-oscilla'ling deflector divided longitudinally into a plurality of passages, for the discharge of fuel into a furnace; a hopper for fuel supply; a hori- Wzontally oscillating pipe adapted to discharg'cyiuel into the passages of said deflector successively; means for conveying fuel from said hopper to an elevation, and thence lo said pipe: and means for oscillating said pipe and said deflector, respectively.

l. In a mechanical stolrer, the combination of a deflector; divided longitudinally into a plurality of passages for the discharge of fuel into a furnace; a fuel supply; Jeans for conveying fuel from said supply to said passages successively; and means for charging fluid under pressure into the pas sages of said deflector. r

.5. In a mechanical stoker, the comhination of a deflector, divided longitudinally into a plurality of passag'es for the discharge of fuel into a furnace a fuel supply; means for conveying fuel from said supply to said passages successively; and means for dis 0 charging fluid under pressurcinto all of said passages sirhultancously.

6. In a mechanical stoker', the cou1hina- .tionof a deflector, divided longitudinally into a plurality of passages, for the dis charge of fuel into a furnace; a hopper for a fuel Suppl means for conveying fuel ,from said hopper to an elevation and thence discharging it into said passages in said deflector successively; and means for. discharg- 40 ing fluid under pressure into the passages of said deflector. r

7. In a mechanical Stoker, the combination of a deflector, divided longitudinally. into a plurality of passages for the discharge of fuel into a furnace; a' fuel supfiector; shunt pipe leading from the air: pipe lastinentioned; and a damper in said .ply; means "for conveying fuel from said supply to said. passages in said deflector successively; a blower; a pipe adapted to disehargeair. from said blower into said deshunt pipe.-

8. In a mechanical stoker, the conrlnnation of a deflector, divided loi'igitudinally into a plurality of passages, for the charge of fuel. into a furnace; a hopper for a fuel supply; means for conveying fuel from said-hopper to an elevation and lhenoe discharging 1t into said passages in said.

. deflector successively; a blower; a pipe adapted to discharge air from said blower into all of said passages" in said-deflector; a shunt pipe leadin ltrom. the pipe last mentioned; and a sniper in said sin n; pipe. 9. in a. mechanical stolccr, the combination discharging it the of an oscillating deflector, divided longi tudinally into a plurality of passages liar the discharge or" fuel. into a furnace; e slaliionary box having corresponding longitu-- din al passages leading lo the said deflec'l'or respectively; a fuel supply; means adapted to convey fuel from. Shana ply, through said hex and deflector, into furnace; and means for oscillating;- said d flector.

10. in mechanical. sicker, the combinapas h deflector successivel g an osc l adapted to discharge fuel into-the passages of said stationary Box successively; a. fuel supply; means adapted to convey fuel iron "said supply to said oscillating lpipc; and means for oscillating said deflector and said pipe, respectively,

11. lln a mechanical sinker, ,tlie COIIllJlI11-.

.v iBLLJlUIlgltmlHEllly tion a d aflector, into plurality of pals: forthe discharge of fuel into a furnace; a vertical pipe having its lower end turned at an angle toward said deflector, and movable about its vertical axis whereby it may discharge ifuel through any of iliepassages of the deflector; a fuel supply; means for conveying; fuel from said supply to said vertical pipe, and discharg' ein; and means for oscillating s .i cal is 12. In a mechanical seeker, the combination of verEmily-oscillating deflector, ,di-

frame cal stolrcr suppo" 77 tacl to a. substantially vercccal lllli rotary siandai'd: means on'saidfranie for delivering fuel to the furnace and :onnec-ted with and to support the standard; and a track arr-an in an are about me axis of rotation of: the standard and. engaged by said roller, the using incline-d downwardly in the erection oiiotation oil? the frame toward the ruzlce, so that the weight of the lame and c tends to cause theroller to move upon the track a direction to hold the sicker in operative position with respect to the llilCif.

a mechanical s'tolrer a menace: a

ie'parts carried therehy horizontally swinging sugporting frame, tion of said track, whereby pressure between having vertical stationary earings; means said part and said inclined portion of said thereon for delivering fuel to the furnace; track holds the Stoker against the furnace. 10 and a track set in an are around the axis ARTHUR R. SELDEN.

5 of rotation ofsaid frame and having a portion inclined downwardly; and a part on said frame running on said inclined por- Witnesses:

D. GURNEE, CLARENCE W. CARROLL.

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