US962322A - Stoker mechanism. - Google Patents

Description

P. L. CRDWE.

STOKER MECHANISM.

APPLICATION FILED SEPT. 24, 1907.

Patented June 21, 1910.

I N INVENTOR,

Wmw; i z 1? Allvmqzv.

P. L. GROWE.

STOKER MECHANISM.

APPLICATION rum) SEPT. 24, 1901.

962,322. Patented June 21; 1910.

WJTJ ES l INVENTbR,

'%'7" 3,, @MQQW UNITED sin-figs PATENT OFFICE.

PRU: L. CRGWE, F JERSEY CITY, NEW JERSEY.

STOKER MECHANISM.

To all whom it may concern:

Be it known that i. l.\t'i. L. (,nowr. a citizen of the lfnitetl States, residing at Jersey ('it in tho eonnrv of lludson 1nd State. of Ken Jersey. have invented certain new and useful improvements in Stoker Mechanism: and l do hereby declare the following to he 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 stokers for furna es and the like, and has for an object to provide a toker of improved design emhod ving improved t'eatures of economy, hoth .ot' fuel and. lahor.

. A further o ject ot' the invention is to provide in :1 stoker a frame of improved construction adapted to support a traveling grate mounted thereon.

further ohject of the invention is to provide in a. device of the class a traveling grate emhod ving new and improved features. lmth in the matter of the grate hat and the connection with the traveling membQlS.

A further ohject of the invention is to provide in :1 stoker improved means for admitting :"uei to the conthttstion chamhcr.

further ohject ot the invention is to provide in :Lstttlitt' an improved :t'orm of c|eanout door.

it further ohjeet ot' the invention is to provitt in a stoker an improved torn: of radia in arch.

With these and other objects in viewfthc inventi n compri es certain novel constructions. comhinatious and arrangements of parts. as will he hereinat'tertnlly described and claimed.

in the drawings: Figure 1 is a view of the stoker showing the frame in side elevation with parts hroken away to exhihit the internal construction and showing the radiatiug arch in section. Fig. 2 is a view in end elevation of the stoker as taken along arrow 2 of Fig. l with pa rte broken away to Sllfll the internal construction. Fig. 3 is a perspective. view of one of the grate hars. Fig. i is a perspective view of the end roller over which the traveling grate passes. Fig. 5 is :1 view in vertical transverse section of a pair of associated grate bars. Fig. 6 is :1 perspective view of the fuel controlling means. Fig. 7 is a view in side elevation of one of the sprockets over which the travel- Specitication of Letters Patent.

Application filed September 24. 1907.

Patented June 21, 1910. Serial No. 394,390.

ing grate passes and from which it receives motion. Fig. 8 is a vertical sectional view of one of the improved sprockets taken on line 8 of Fig. 7. Fig. 9 is a fragmentary view of one end of a grate bar showing the shoe meaus for attachment to the traveling chain. Fig. 10 is a fragmentary view of the ends of the grate bar opposite to that shown at Fig. 9 and showing means for atitlt'llllt." the grate bar to a horizontal link of the chain.

Like characters of reference designate corresponding parts throughout the several \HWYH.

The improved stoker forming the subjectmatter of this application comprises a frame composed of side pieces and 16, prefera lv composed of bar metal, the latter being disposed beneath the former and inclined relative thereto with the rear or back end of the frame spaced wider than the front end. The frame pieces 15 and 16 are supported and tttllttl together and Spaced by means of struts 17 at the rear end of the furnace. aml the supporting frame members 18 at the frontend of the furnace. It is to he understood that the stoke", of which the frame forms a part, is set within the comhustion chamber 19 of a furnace for heating any approved object, as the conventional boiler :20 and the front end of the furnace is closed by means of a plate 21 forming also the. front or outer end of the stoker. The frame pieces 15 and lti are also spaced apart adjacent their forward end by means of a trut 32 and between the frame )ieces forming the opposite sides of the stol journaled a roller '23 shown at Fig. 4 in perspective by the shaft or trnnnions 24, and with a'shat't 25 journaled at or adjacent the forward end of the frame and carrying upon opposite ends sprockets 26 shown in detail in Figs. 7 and 8 and over which sprockets chains 27 are moved by rotating the shaft It will he noted that the chain 27 comprises alternating vertical and horizontal links which are maintained in such relative positions by the formation of the sprockets 26 as shown. 'l rmisverscly between the chains 27 are disposed grate bars 28, each of said lJtll'S having at one end a ter is hook 2Q proportioned to be inserted through one of the vertical links of the chain 27 and at its opposite end with registering recesses 30 proporhoned to recelve upon opposite sides hooked engaging members 31 adapted,

to hook throu h and en a e one of the hori- U C D zontal links of the chain 27, as shown at 5 Fig. 10.

Ihe grate bar 28 18 provided with a web 32 of such conformation as to conform substantially with the external curvature of the j roller 23 so that as the said grate bars 28 carried by the chains 27 pass over the said roller 23, practically all of the air is shut 3 off and is, therefore, obliged to pass through the grates while traveling upon the upper side and the length of the stoker.

Beneath the rearward end of the stolter 5 and beneath the roller 23 an ash space 33 is provided terminating at the bottom in any j approved means for discharging the ash as the chute 34. Spaced transversely beneath the frame pieces 16 are a plurality of rollers 35 journaled upon shafts 36 adapted to carry the traveling grate in its return movement and inverted position, and against the rearward one of said rollers 35 a hinged plate 37 is arranged to hear at its upper end to close the passage beneath the Stoker and to prevent ash from passing therethrough, also to practically shut off the air from passing beneath the stoker and through the ash space 33 into the combustion chamber 19. The door or plate 37 is pivoted above the center and held in closed position by the weight of its lower part, so that any clinkers or any inequalities may pass through and supported upon springs 38 which maintain the said roller in yielding contact with the under side of the traveling grate by which arrangement clinkers may also pass by the said roller as well as the said door without fracturing or straining the structure.

To carry and support the upper or fuel supporting surface of the traveling grate a plurality of rollers 39 are employed journalcd upon shafts or trunnions 40. the said shafts androllers being alined longitudinally of the. frame but owing to the fact that the chain 27 comprises alternate horizontal and vertical links, it will be seen that as the said chain passes over the rollers 39, the links will raise portions of the said chain and the grate bars connected with such portions as indicated by' the arrows 41 in Fig.

1, so that the movement of the traveling grate is undulatory, keeping the fuel thereupon in a loosened condition and preventing undue coking and concentration of the fuel.

Above the forward end of the traveling grate a. hopper 42 is supported in any approved manner as by the frame pieces 18 and in the lower open endof said hopper is journalcd a segmental controlling device shown in perspective at Fig. 6 and embodying end plates or disks 43 having trunnions 44 extending in opposite directions axially therefrom and journaled in the end walls of the hopper. Between the disks :1 segmental plate -14 is provided proportioned to close the opening 45 in the lower side of the hop- 5 per. and a shield or batlle plate 46 is mountf ed within the hopper having a curved plate 47 proportioned and positioned to permit I the segmental plate -14 to pass in the rear E thereof and to be protected in such movement thereby and by the battle plate 46, so that the controlling device may be rotated i in the direction indicated by the arrow without the segmental plate A engaging with and being stopped by the fuel contained in the hopper. Upon the end of one of the ttrunnions 4-t and without the stoker and furnace structure, a weight 48 is mounted Z adapted to hold the feeding device normally closed.

[ Beneath the feed opening 45 a feed plate -19 is pivoted as by the shaft 50 journalcd in the stokcr or furnace structure and preferably in the frame piece 18 and upon the said shaft 50 a weight 51 is mounted of such proportion and in such manner as to equalize the weight of the feed plate provided also with a handle 52 for convenience of manipulation and with a catch or detent .33 positioned to hold the door normally in closed position. i front plate 21 of the stolter and furnace is curved over the end of the stoker and cxtended as at 53 beneath the lower edge of the feed plate.

To the rear of the rear wall of the hopper 42 a radiating art-h 5G is provided comprising a plurality of sections as indicated 5 in dotted lines in Fig. 2 being formed keyed in the well known manner of arch construction and with bolts 57 disposed between and their heads embedded in adjacent sections and extending through the rear plate of the hopper securing the arch thereto. To further support the arch skcwbacks 58 extend outwardly from the inclosing walls of the furnace and provided with inclined surfaces proportioned to engage the extremities of the blocks and support the arch.

The lower edge of the rear wall 5:: of the hopper is curved as at 58' to inclose a cooling device shown conventionally at 59.

The grate bars 28 comprise preferably a bar portion supported upon the web 32 and with the fingers of the grate 59 extending only upon one side of the bar portion and normally approximately in engagement with the next adjacent bar and positioned to vary if there is a movement of the chain upon the inclined side of the bar to prevent one bar settling materially below the adjacent bar.

In operation it will be understood that fuel is admitted. by rotating the segmental Itwill be seen that thecontrol in the direction indicated by the passes obliquely downward upon the surface of the traveling grate comprising the chain 27 and the grate bars 28. The traveling grate as it. passes over the rollers 39 is given an undulatory movement in the manner aoove described and air is forced into the stokcr beneath the grate and fed through the traveling grate in the usual well known manner so that the fuel upon the surface of the traveling grate is consumed as the grate travels from front to rear. It, is, of course, designed to move the grate at suclr a rate that the fuel will be entirely consumed before it reaches the rear end so that. nothing but ash is discharged over the rear end of the traveling grate and air is prevented from passing in any grczg' quantities from beneath the stoker through the ash space 33 by reason of the formation of the roller 23 and the interposition of the pivoted plate 37.

The feed plate, as implied by its name,

serves not only to direct the flow of fuel from the feed opening 45 to the traveling grate, but also, in case. of necessity, to permit; access to the interior of the combustion chamber, and to the Stoker.

The radiating arch formed as described of the keyed segments is found to be a very important feature of the present invention, especially in connection with the means for supporing such keyed segments comprising the bolts 57 extended through the rear plate or wall of the hopper and also the skewbacks which are rigid or integral with the inclosing wall of the furnace adapted to support the opposite ends of the arch and owing to its keyed structure supporting thereby the entire arch when held in engage ment by the bolt.

\Vhat I claim is 1. The combination with a furnace having a grate surface and ignition arch above the grate surface, of skowbacks mounted at the side of the furnace and extending the depth of the arch, said arch comprising keyed blocks the depth cf the arch, all selfsupporting upon and between the skewbacks, a member arranged transversely of the outer face of the arch, and retaining means connecting each of the blocks with such transverse member.

:2. The combination with a furnace having a grate surface and an ignition arch above the grate surface, of skewbacks mounted at the sides of the furnace and extenl'ling the depth of the arch, said arch comprising keyed blocks the depth of the arch, all selfsupporting upon and between thev ken' backs and forming a continuous plain under surface throughout the transverse extentof the ar h, a member arranged transversely of the outer face of the arch, and retaining means connecting each of the blocks with 3. The combination with a furnace having a grate surface and ignition arch above the grate surface, of skewbacks mounted at the sides of the furnace and extending the depth of the arch, said arch comprising keyed blocks the depth of the arch self-supporting upon and between the skevvbacks, a hopper, and bolts secured betwcen adjacent key ed blocks and securing the hopper to the arcn.

4. The combination with a furnace having a grate surface and ignition arch above the grate surface, of skeWb-acks mounted at the sides of the furnace and extending the depth of the arch, said arch comprising keyed blocks the depth of the arch all self-supporting upon and between the skewbacks, and forming a continuous plain under surface throughout, the'transverse extent, of the arch, a hopper, and bolts secured between adjacent keyed blocks and securing the hopper to the arch.

In testimony whereof I afiix my signature in presence of two witnesses.

PAUL L. cno'wn.

\Vitnesses Anna E. Din'rz, Emrn S. I{INNEY.

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