US895764A - Automatic furnace. - Google Patents

Description

No. 895,764. -PATENTED AUG. 1'1, 190s.

J. E. JoNEs. AUTOMATIC FURNAGB.

` APPLICATION PTLEDTUNT: as, 1900. Emu-:wrm Dnc. s, 1907.

' 'asume-SHEET 1.

PATENTED AUG. 11, 190s. J. E. JONES.

AUTOMATIG/ PURNAGE. v YPLIUA'FIO FILED JUNE 23, 1900. BENEWED DEU. 1907.

3 SHEETS-sum1" al UNITED OFFICE. JOEL EDGAR JONES, OFiCHICAGO, ILLINOIS, ASSIGNOR, BY. DIRECT MESNE 'ASSIGN- MENTS, TO JONES AUTOMATIC STOKERA COMPANY, OF CHICAGO, ILLINOIS,- A C ORPORA- -TIoNA oF IL'L1NoIs.

Specification of Letters Patent.

AUTOMATIC F'U'RNACE repented-Aeg) 11, 190e.`

. Application led .Tune 28, 1900, Serial No. 21,936. Renewed-December 6, 1907. l Serial No. 405,422.

To allwhom 'it may concern.' I l. Beit known that I, JOEL vEDGAR JONES, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Im rgyements, in Automatic Furnaces, ofwqhic i the-'following is a specificac tion. -Y

My -inventionprela'testo what are known in the practical art as automatic furnaces or stokers of the under feed class, and one object thereof is to improve the general construction and operation of the retort as well as the fuel feeding mechanism, and another object is to provide suitable and efficient means for grinding and disposing of the slag, and keeping the twyers clean, whereby a self-feeding and self-cleaning'furnace is obtained.

My invention also embodies novel and advantageous constructions'and operations in connection with the features above mentioned, which will be apparent from the desystem; Fig. 2, a sectional plan of the retort,

slag or clinker basins land the hopper g Fig. 3, a section on line 3 ofFig. 4, but;with the blower shown in elevation; Fig. 4, a section on line 4 of Fig. 3 Fig. 5', a detail View of the mechanism for reciproc'atin' 'the bar which actuates the clinker bars; ig. 6, a view vin elevation of one of the clinker or slag basins; Fig. 7, a section-of a modified form of construction in which two conveyersv are used insteadof one; and Fig. 8, aview in elevation showing the gears whereby, the two conveyers may be properly operated by the same worm. 1 Y In front of afurnace or boiler 1 is arranged the usual hopper 2 communicating with a conveyer pipe 3 in which a screw conveyer or worm wheel 4,0perates and extends into the retort or magazlne 5. The retort may lbe of the usual form, but is preferably creased at its rear end to resent a central Wedge to the fueLfed fromt e end o'f the oonveyer. The conveyer, as shown, is of 'uniform carryin capaclty and its object is to-feedthe fue ported in any suitable way, consists similar twyer openings 17 and form a support for the retort, asA

The referable construction and arrangement of) the retort and outer casing is shown in the drawings in which the 'casin 'has top side flanges on which rest similar anges ofl the. retort. The slag basins and twyer blocks are also preferablyssupp'orted on the Casing flanges.

The. retort which 'is arranged and supreferably of a casting provided with the de ecting plates 7 and 8l which are by preference made ollow to afford air passages 9 'oommunicat-l ing with the chamber beneath'forme'd by the s retort casing 6. Each deiector is arched at its lower end so as to inclo'se the sides and top`of the conveyer, and as it is provided with an o ening forming a port or passage substantia ly the diameter of the conveyer,

'it provides a cylindrical bearing which is engaged by the periphery of the flights of the conveyer so thatthe conveyer is held in. place and prevented from being lifted by the coal under the. conveyer. By reason of the arrangement described of the vdeflectbrs y7 and 8 the retort is divided into separate chambers having no communication with each other except between the flights of the conveyerand over the vtop of the-deflectors. A longitudinal V-'shaped casting orLbackbone 10 is also forme on the retort and'to the same are secured the two series of hollow twyer blocks 11 and 12 which, when in osition on the part 10, form a V-shape air chamber 13 communicating with the passages 9 of the hollow deflecting plates and with the chambers o f the blocks 11 and 12 through ports 14. The blocks 11 have. lateral twyer openings 15 and diagonal twyer o enings 16 .on their inner sides, While the bloc s 12 have Along each' side of the retort areseries of.. twyer devices 19 and 20 hav1ng twyer openings 21 and 22, respectively, and preferably 'consisting of a serles of removable blocks.

Arranged longitudinally Aof the retort, on each slde thereof, beyond the series of blocks 19 and 20, is formed what may be conveniently termed a sla or clinker basin comprising a frame wor orl casting 23 suitabl supported andprovided with a central longitudinal ofenin 24 at the bottom; of the basin, an a series of lateral openings 25; bar or shaft 2 6 having teeth 26 registering with said openin s 25, is located in the opening 24 and exten s through the closed ends of the basin and through the furnace front,

bearing at one end in the box 27 and at the other endin a box `or journal 28 rovided in an extension of the lslag basin, W ich box'is preferably arranged outside the retort beyond any injurious effect of the heat.l The teeth on the clinker bar are preferably arthe burnin ou't of the basin from the great heat, besi es aiding in combustion.

grates may be provided and'preferabhv1 ofthemt in Fig. 2, the hollow rotating v,

ings are immaterial so long pur ose is attained.

ranged spirally thereon so thatI only a limited number of the teeth will engage with the openings at any, one time... Moreover, the particular shape and inclination of the openas the desired T e clinker bars are preferably hollow and providedwith a series of o enings preferably arranged spirally. The ont end of the clinker bars is closed, but the rear end is open and connected to a small steam pipe 29, communicating :With a source of steam,

either exhaust or live. By this means steamA is caused to be emitted for the purpose both of moistening the clinkersandfpreventing Between the furnace Wall and the-basins dead set on an incline so thatfthe molten slag w run into the slag basins more readily. It is understood that both basins are similar in (construction and operation and, therefore, the above description is applicable to both kAs shown bars 26 have a series of perforations which are so ,located with respect to the teeth on the i bars as to emit steam against clinkers orsla and also the fuel conve er. Vboilerfront the clinker when the'latter are engaged by the teeth an Y being operated upon ori ground. At thesa-me time the steam serves to cool the barsA and basins and also aids in combustion.

As shown in Figs. 2 and 3, the basins may be su orted u on a flange formed on a combinedpliearing ar and end rate 31 which may be arranged in thel usuaway infront of the bridge wa l 32.

While the cljnker bars may be operatedby' an ordinary hand wrench or crank and while the different devices may be separately operated, I have shown a system or plan whereby they may be operated by the same engine or power which may serve to run the blower Outside the ars are provided wlth oppositely actuated yratchet wheels 33 and 34 mova'ble in the direction of the arrows, respectively. A bar 35 reciprocating .mechanical equivalents of the drivin nection 52 With the air box or chamber desired. speed. he transverse deilectinvr fuel tothe front of the retort.

Vseries of twyer blocks supplies the' necessary ,air to the middle bed or portion of the fuel or of the rotatin of actuates the clinker bar 33. This arrangement possesses the advantage of throwing the strain of only one clinker bar at a time upon the actuating bar.

For operating the conveyer, any suitable method may be adopted. lAs Shown, the shaft of the conveyer is carried outside the furnace front where a Worm wheel 44 is at' tached thereto. A driving Worm gear 45 meshing with; said Wheel 44 is secured to a shaft 46 which carries-a sprocket wheel 47 driven-by a sprocket chain 48 and sprocket wheel 49 on the lengine shaft. Obviously,

connections shown may be adopted. T e-ene may also be'used to drive the blower and -1n such case its pulley 50 may be connected by abelt to an air blower 51 Whose delivery A p1pe'52 communicates through the inlet con,-

formedrby the retort casin 6. From the casing 6 air passes through t e passages 9 of the deecting plates into the chamber 13 of Y theback-bone 10, and then from such chamber through `the openings-14 into the chambers Aof the blocks 11, and 12,- from which it emerges by the passages y15', 16, 1.7 and 18.

Air is. supplied from the casing 6 to the blocks 19 and 20 throughsuitable openings (not shown) in the bottom of such blocks. While the air is shown as enterin the rear of the retort casing through such de ivery ipe,

it is obvious' that theair may be intro uced at an other oint in the casing,`as may be foun convenient or desirable. 10o 1 In o eration, the fuel is-underfed, that is, the fue lsupplied to the hopper is conveyed bythe worm or screw conveyer into the retort, being thereb fed uniformly and at the .'105 plates serve to deflect the fuel u wards, an plate 7, which is; located in the orward art of the retort, :particularly serves to deect v The fuel is coked and the coke overows on both sides over the'top of the tWyer blocks', which supply the necessary air to the gases generated A 1n the coking operation and also supply Iair for the combustion' of the, coke. The centralv cokeand prevents the formation atthis point of any cylinkers, whereby the area of the grate surface covered by the twyers may be materially increased. The slag or clinkers overflowing the sides of the/ retort fall into lthe slag basins and when in molten condition are ground down `into the ash pitby the action clinker bars. The steam emitted at the s agbasins serves to cool them as well as the bars and prevent'their burning out; it also moistens the slab;r` or clinkers and in addition serves to aid in the combustion of the fuel.

By theluse of the clinker bars, 'a seriousglisO most economical'system is adopte of regulating the speed of the moving As will be readil understood from the drawings, Avthe smal' Vengine simultaneously actuatesthe screw'conveyer, the clinker bars and also the blower, 'by means of the connections hereinbefore described. The 'advantage of having all of these parts operated by` a common engine consists in .the possibility concurrentl When the engine is regu ated to run slow y, the fuel is fed proportionately slower, and less volume of a1r is-introduced and the clinker bars are also rotated slower. On theother hand, `when the fire is to be forced, the engine is regulated to run faster, whereupon the feed of fuel and the volume of air' will he increased as well as the s eed ofV rotation of the' clinker ,bars` By t is arrangement perfect control may be had vfrom one throttling valve.

The deliecting plates 7 and 8 in the retort are adapted to deflect the coal extending beyond the radius of the conveyer. It is evident that assoon as the fuel is conveyedbe. yond the pipe 3, some of the coal will spread eyond the radius ofthe conveyer and this coal will be forced upwardly in the retort bv the dellecting plate 7 whereby the coal'will not only be thus deflected upwardlly, but the front of the retort will be kept il d. Any coalleaving the conveyer after the plate 7 has been passed will be deflected in a similar manner by the plate 8, while the coal continuing .with the` conveyer willV be forced backwardly and upwardly 'along the sloping rear end of the retort by the action of the conveyer. The V-shaped back-bone l0serves to divide the fuel and dellectit evenly to both sides of the retort. As shown in Fig. 4, the ribs or plates are hollow, which will permitof the passage of`air from the'casing 6 and thereby serve to keep these plates comparativelycool. By means of the construction of conveyer and plates, the fuel is fed and distributed in the retort continuousl and uniformly so as to form a bed which -1s substantially level from front to rear.

The central series of twyers 11 and 12 not only have the advantage of supplying air to the middle portion of thelfuel bed, but also prevent the formation of clinkers along the middle lineol the retort and, furthermore,

permit ol' the use of a retort with a wide open arts the air cham er through ports 69.

V,top or grate surface so that asingle retort with a single eonveyer may be used in a furnace of ,considerable width. Byreason of the extended grate surface and the increase in the effective air distribution, I am enabled to vcarry a thin bed; of re -over ythe twyers, through which a sufficient volume 0f air at low pressure may be supplied, thereby enabl'ng` complete combustion in the furnace instead of causing the gases to be driven out before combustion on account of a high air pressure, as required in present practice. Furthermore, the possibility of having a thin fire affords a greater distance between the fire and the crown sheet of the boiler thereby avoiding liability'of burning out or blistering such sheet.

'In Figs. 7 and 8 isshown a modified construction of my automatic furnaceso far as the construction of the retort is concerned. In these figures, the slag basins andl dead grates have a construction similar to those shown in the preceding gures and they are,

therefore, correspondingly indicated. There is, however, one difference as to the slag basin in that in the formshownfin Fig. 7 the clinker bar, which may be hollow or solid,

does not'have fthe function of a steam pipe, but small perforated Asteam pipes 53 are arranged below the slag basin to` emit steam for the same purpose as the clinker bar when also used as a steam ipe. These steam pipes 53 run longitudina ly of the retort and may be connected to a suitable source .of steam`su ply, either live steam or exhaust steam. hen exhaust steam is used it may be preferable to use the clinker...bar as the" steam pipe and when live s team is used it may be preferable to employ the small separate steam pipes 53.

As shown in Fig. 7, the magazine consists of two retorts 54- and 55y having separatescrew conveyers 56 and 57, respectively. The hubs or shafts of the conveyers extend through the furnace front; where lthey are provided with the gear wheels 58 and 59, respectively, which -mesh with a common pinion 60 whereby the conveyers are rotated simultaneously in o posite directions. gear 60 is connecte to a Worm -gear 61 actuated by a worm 62 driven in any suitable 'lXhe rectangular upwardly extending portion 63 of the magazine forms the middle part of the air chamber and a series of central twyer blocks 64 having suitable twyer openin gs is arranged `thereon and communicates W1th such chamber through ports 65. At'- the sides of each separatevretort and on a laterally extending flange are arranged series of twyer blocks 66 and 67 having suitable twyer openin *s 68 yand' communicatin with T le retorts may be provide( if desired, with deflecting plates or arches of the same con- Wayliy the conveyer.

extending into the retort., and a deflector rovided with a passage-Way of Substantially the same diameter as the conveyer, said d eflector adapted to, deflect laterally the material not positively. conveyed. through the passage-Way by the conveyer.

2. The combination of a retort, a screwconveyerv extending into the retort, and a defleetor rovided With a passage-Way of Substantia ly the Same diameter as the conveyer, said deflector adapted to deflect laterally the material not. positively conveyed throu h the passage-way by the conveyer.

'3. ii an'underfeed Stoker, thecombina-` tion of a retort, a conveyer arranged longitudinally'thereof, and a series of deflectors, each being so 'formed .and arranged with respect to the retort as to form a passage- Way for the conveyer of substantially the Same Size in cross section as the conveyer and adapted to deflect laterally the material not positively carried through Said passagean automatic furnace, the combination'of a retort, a screw-conve er extendin into the retort for forcing fue therein, an an arched deflecting-plate arranged. in the retort in close proximity to the conveyer for deflecting fuel which extends beyond the radius of the conveyer. y

5. In an underfeed Stoker, the combina-I tion With a retort, of a screW-conveyer therein, and a deflector in said retort dividing it into separate chambers having no communication vWith each other except between '-thef flights of'the conveyer and over the vtop of said deiiector. 6. .In an underfeed Stoker, the combination of a retort, a screw-conveyer Within said retort, and a cylindrical bearing 'Within the retort engaging With the periphery of the flights of the screw conveyerand in the line of travel of material fed by the fscreW con- .veyer. d

7. In an underfeed Stoker, the 'combination with a retort and a screW-conveyer'withinsaid retort, of a deflector carried by the retort and inclosing the Sides and to of the conveyerto form-an opening throng i which material fed by the oiiveyer may pass.

8. In an underfeed Stoker, the combina- `tionwith a retort and a scrcW-conveyer in said retort, of a plurality -ofbearings sur'- rounding the sides and top of the wings or ilected, and having a port or passage for theV conveyer.

10'. In an underfeed furnace, the combination of a retort, a deflecting-plate in the retort provided with an o ening, and ascreW- conveyer for forcing t e fuel therein and adapted-to the opening in the plate.

f 11. Inan underfeedfurnace, the combination of a retort having a transversely curved bottom and dellectingplates dividing theretort into chambers, said lates being arched at their lower ends, and) a screW-conveyer filling the openingsl provided by the arches in said plates.

v12. In an underfeed furnace, the combination 'of a retort, a screW-conveyer therein,v

and a dividing deflecting-plate having a port to fit the conveyer whereby such fuel as 1S in the retort beyond the Aarea of the flights of the conveyer is deflected upwardly by the late. p 13, In an underfeed furnace, the combination "of a retort, a .deflecting-plate therein'dividingthe retort into chambers, a port'in the plate, and a screW-coiiveyer .whose flights approximately correspond invdiameter to the area of the port. v

14. In a Stoker, the combination W ith a re- Said retort substantially fitting the crosssectional curvature of the conveyer for a por-` tion ofl its transverse area and then flaring outwardlv to increase the re zone, 'and combined (leflecting and upthrust plates adapted to the flights ofthe convcyer.

15. In a Stoker, the combination withlaietort having a transversely curved bottom, a screw convcyer adapted to the curve of the bottom', and deflecting4 lates in the retort curved to fit the flights o the worm and serv.v

and deflector having its edge adjacent the. conveyerin continuation of the curvature of the retort bottom.

tort, a screwcoriveyer Within the retort, the

17. Ina Stoker, a retort having a tiansversely curved bottom, a screw coiiveyer Vsubstantially filling thel bottom of the retort,

and a deflector within the retort located over the conveyer and having'its edge adjacent to the conveyer substantially concentric therewith. v 18.V In an automatic furnace, the combina- `tion ofa 1etort,"mecliamsm for forcing fuel v ing havin and fuel deiiector in the retort having a passage for` conductingair to the tw'yers.

20. In a furnace, the combination of a casan air inlet, 4a retort, a conveyer eilectors therefor, anda series of` twyer blocks arranged longitudinally of the retort over the conveyer, each of.said deflectors having a passage through which the air ,passes from the casin to the twyer blocks.

21. In-a'furnace, t e combination of a retort therem, twyers Iextending longitudinally of the retort, and a fuel deflector in the retort having azp'assage for conducting air to the twyers.

22. In a furnace, the combination of a retort-having a transverse deflecting plate and a backbone, twyers on such backbone form- ---ing, in connection therewith, a chamber 25` which extends longitudinally of the retort and communicates With the twyers, and a source of air supply, the delecting plate having a passage to conduct the air to the said chamber. y

23. In an automatic furnace, the combination lof a retort, fuel feeding mechanism therein, and means arranged above the bottom of the retort for dividing and deflecting the fuel to bothsides ofthe retort.

24. In an automatic furnace, the combination4 of a retort, fuel feeding mechanism therein, and a central back-bone arranged above the bottom of the retort for dividing and deflecting the fuel to bothsides of the retort.

25. lIn anunderfeed furnace, the combination of a retort having a transverse deecting-plate, a longitudinal back-bone above the plate, and a screW-conveyer for forcing the fuel Within the retort.

26. In an underfeed furnace, the combinay' tion of a retort having transverse deectingplates, a back-bone extending centrally of the retort near the top thereof" to divide the fuel to both sides ofthe retort, and fuel feeding mechanism Within the retort.

27. Inan automatic furnace, the combination of a retort having a transverse deflecting-plate and a longitudinal back-bone, tWyer blocks on such backbone, and means for forcing fuel into the retort.

28. In an automatic furnace, the combinav l tion of a retort having a transversedeflecting-plate and a back-bone extending centrally of the retort substantially fro'm end to end at the top plane thereof, twyer blocks on such back-bone, and means for forcing fuel into the retort. v

29. In ah automatic furnace, the combination of a retort having a transverse deflectprovidedwith means for forcing fuel ing-plate and a central back-bone connected to s uch plate, tWyer blocks on such backv bone, twyer blocksalong the sides of the retort, and means'for forcing fuel into the retort.

30. In an automatic furnace, the combination of a retort having a transverse plate and a substantially V-shaped back-bone, twyers on such back-bone forming, in connection therewith, a V-shaped chamber longitudinal of the retort, said chamber having an air inlet and communicating with the tWyers and an underfeeding mechanism for the retort.

31. In an underfeed furnace, the combination of a retort, a screW-conveyer therein, a series of tWyer blocks on each side of the retort, and a central series of twyer blocks sup'- ported on the retort in its longitudinal central line. l

32. In an underfeed furnace, the combination of a retort, a screw-conveyer therein, a series of tWyer blocks on each side of the retort, a central longitudinal back-bone, and a series of tWyer blocks on the" back-bone.

33. In an automatic furnace, the combination of an underfeeding Stoker, tWyers-therefor, and slag grinding mechanism.' for. disposing of the slag and keeping the twyer openings clear.

34. In an automatic furnace, the combination of an underfeeding stoker, twyers therefor, and slag grinding mechanism arranged along the sides of the Stoker and adapted to dispose of the slag and thereby keep the twyer openings clear and maintain a sub stantially horizontal bed of fire.

35. In an automatic furnace, the combination of an 'underfeeding Stoker, tWyers therefor, slag basins arranged beyond the sides of \the stoker and substantially atthe-fire line, such basins each having a longitudinal opening and a rotatable bar operating in each of such openings to kee the. twyer openings clear and to dispose o the slag, thereby preventing accumulation of slag beyond each side of the stoker and maintaining a substantially horizontal bed of fire.'

V36. In an automatic furnace, the combination of an underfeeding Stoker, tw'yers therefor, slag basins arranged beyond the sides of .the stoker and each having a substantially teeth or projections Working through said side openings'.

37. In an automatlc furnace, the combina.

38. .In an automatic furnace, the combina- Yunderfeeding soker, twyers therefor, slag- 15 basins arranged along the sides of the stoker and o en at their bottoms, bars rotating in. gasins and adapted to dispose of the such slag and keep the tWyer openings clear, such bars being journaled outside and beyond the' front and rearends respectively of the basins,

and means for rotating the bars.

41- The combination o f a casing havingA side Hanges, a retort having side flanges resting upon the flanges of said casing, twyer blocks supported on the retort flanges, means .in the retort for feeding fuel, and a slag grinding mechanism arranged beyond the twyer blocks and along each side of therel Crrction in 'Letters Patent No.A 895,764.

tion above the slag basin.

tort, such slag. grinding mechanisms being supported on the flanges of the casing.

42. .The combination of a retort, fuel feeding mechanism therein, twyerstherefor, slag grinding mechanism arranged beyond each side of the retort and adapted to keep the twyel openings clear, such mechanism con-v sistlng of a basin having a longitudinal openerforated bar rotatable in ing, and a hollow communicating with a such op ening an Vsource of steam which is emitted through the perforations in said bar to cool the same and the basin and to prevent sticking of the slag to the basin as Well asto aid in combus- 43. The combination of a retort, fuel feeding mechanism therein, vtwye'rs therefor, slag grinding mechanism arranged beyond each [SEAL] side of the retort and adapted to keep the twyer openings clear by disposing of the slag, such-.mechanism consisting of a basin having a longitudinal opening and ahollo-W bar rotating in such opening and provided- With teeth or projections, said bar communicating with a source of steam and having openings located near said teeth to emit steam against the clinkers or slag While being lcontact ed and operated upon by the teeth. 4

44. In an automatic'furnace, the combination With a retort, of mechanism for feeding fuel into the retort, slag grinding mechanismon both sides ofthe retort, an' air blower supplying air to the retort, and a common niotor for actuating such feeding mechanism, such grinding mechanism and said blower.

45;v In an automatic furnace, the combina-V tion of a retort, means for feeding fuel thereto, and a series' of twyers located 'centrally` and longitudinally of the retort.

46. In an automatic furnace, the combination of a retort, means for feeding fuel therev to, slag grinding mechanism along each side of the retort and gratesbeyond such mechanism-and inclined downward thereto.

' 47. ,In an automatic furnace, the combination of'a retort., means for feedingA fuel therein, twyer blocks along two oppositel sides of .the retort, and slag rinding 'mechanism along the sides of the retort bevond such blocks and arranged substantially in the vsame plane as the grate or fire surface of the retort, such grinding mechanism receiving molten slag and refuse flowing over. theV twyer blocks and disposing of t-he same to keep the fire clear and clean and to extend l It is hereby certified that iu Letters Patent No. 895,764, granted August 11, Y190s, upon the application of Joel Edgar Jones, of Chicago.'Il1inois, for an improvement in Automatic Furnaces," Yan error appears in the printed specication requiring correc- .tion,.a.s follows: Inline 61, page 4, the word onveyer should read vkconveyor, and that lthe said Letters 'Patent should be `,read with this correction therein that the same may conform to the record of the casein the Patent Oce. i

Signed and sealed this 8th day of September, A. D., 1908. i y

o.' o. BILLINGS,l

Acting Commissionerof Patents.

Yunderfeeding soker, twyers therefor, slagbasins arranged along the sides of the stoker and o en at their bottoms, bars rotating in. gasins and adapted to dispose of the such slag and keep the tWyer openings clear, such bars being journaled outside and beyond the' front and rearends respectively of the basins,

and means for rotating the bars.

41- The combination o f a casing havingA side Hanges, a retort having side flanges resting upon the flanges of said casing, twyer blocks supported on the retort flanges, means .in the retort for feeding fuel, and a slag grinding mechanism arranged beyond the twyer blocks and along each side of therel Crrction in 'Letters Patent No.A 895,764.

tion above the slag basin.

tort, such slag. grinding mechanisms being supported on the flanges of the casing.

42. .The combination of a retort, fuel feeding mechanism therein, twyerstherefor, slag grinding mechanism arranged beyond each side of the retort and adapted to keep the twyel openings clear, such mechanism con-v sistlng of a basin having a longitudinal openerforated bar rotatable in ing, and a hollow communicating with a such op ening an Vsource of steam which is emitted through the perforations in said bar to cool the same and the basin and to prevent sticking of the slag to the basin as Well asto aid in combus- 43. The combination of a retort, fuel feeding mechanism therein, vtwye'rs therefor, slag grinding mechanism arranged beyond each [SEAL] side of the retort and adapted to keep the twyer openings clear by disposing of the slag, such-.mechanism consisting of a basin having a longitudinal opening and ahollo-W bar rotating in such opening and provided- With teeth or projections, said bar communicating with a source of steam and having openings located near said teeth to emit steam against the clinkers or slag While being lcontact ed and operated upon by the teeth. 4

44. In an automatic'furnace, the combination With a retort, of mechanism for feeding fuel into the retort, slag grinding mechanismon both sides ofthe retort, an' air blower supplying air to the retort, and a common niotor for actuating such feeding mechanism, such grinding mechanism and said blower.

;v In an automatic furnace, the combina-V tion of a retort, means for feeding fuel thereto, and a series' of twyers located 'centrally` and longitudinally of the retort.

46. In an automatic furnace, the combination of a retort, means for feeding fuel therev vsame plane as the grate or fire surface of the retort, such grinding mechanism receiving molten slag and refuse flowing over. theV twyer blocks and disposing of t-he same to keep the fire clear and clean and to extend the eifective fire surface. y f

48. In'an automatic furnace, the combination with fuel feeding mechanism, of a retort Whose inner end is inwardly creased at its middle.

JOEL EDGAR JONES. VVit-nesses:

SAMUEL E. HIBBEN,

LOUISE ESERAGE.

l It is hereby certified that iu Letters Patent No. 895,764, granted August 11, Y190s, upon the application of Joel Edgar Jones, of Chicago.'Il1inois, for an improvement in Automatic Furnaces," Yan error appears in the printed specication requiring correc- .tion,.a.s follows: Inline 61, page 4, the word onveyer should read vkconveyor, and that lthe said Letters 'Patent should be `,read with this correction therein that the same may conform to the record of the casein the Patent Oce. i

Signed and sealed this 8th day of September, A. D., 1908. i y

o.' o. BILLINGS,l

Acting Commissionerof Patents.

Correction n Letters Patent No. 895,764.

It is hereby certified that in Letters Patent No. 895,764, granted August l1, 1908, upon the application of Joel Edgar Jones, of Chicago. Illinois. for an improvement in Automatic Furnaces," an error appears in the printed specification requiring correction, as follows: In line G1, page 4, the Word onveyer should read conveyor; and that the said Letters Patent should be dread same may conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of September, A. D., 1908.

[SEAL] with this correction therein that the C. C. BILLINGS, Acting Commxsoner of Patents.

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