US1759042A - Incinerator - Google Patents

Description

y 0, 1930. F. 0. DE CARIE 1,759,042

INCINERATOR Filed Novjzo, 1926 4 Sheets-Sheet 1 Q N to I\ Q Q Q Q Q ATTo Nz'K y 1930- F. 0. DE CARIE 1,759,042

' INCINERATOR Filed Nov. 20. 1926 4 SheetsShe et 2 f /r/E Wroz? Fan/x O. CAR/f Arzfggggyzx' May 20, 1930; F. 0. DE 'CARlE INC INERATOR Filed Nov. 20 1926 4 Sheets-Sheet s May 20, 1930. F. 0. DE CARIE INCINERATOR Filed Nov. 20

1926 4 Sheets-Sheet 4 p 4 ifiaiit Patented May 20, 1930 UNITED STA rnLIx o. nnonnrn, of Les ANGEL S, cALIronNm mcrnnnnron Application filed November 2Q, 1-926. Serial No. 149,606.

This invention relates to incinerators such as are used by municipalities and large organizations for incinerating refuse.

In order thatan incinerator completely 5 burn the refuse economically it is necessary that there be an ample draft. In the orthnary incinerator the refuse tends to pack against the walls thereof, thus obstructing th'e draft. It is'an object of this invention to n provide an incinerator inwhich' the refuse cannot pack against the Wall thereof. In my invention the draft will be preserved and efiicient burning will take place. I accomplish this object of my invention by providing the incinerator chamber with vertical piers which hold the refuse away from theywal'l. Since the temperature in thefu'rnjace is very high, the piers must be properly cooled to prevent their being burned out. i

It is accordingly an object of this invention to provide an incinerator in which the piers are cooled by circulating air therethrough.

It is another object jof-the invention toprovide an incinerator having piers which are air L5 cooled.

The incinerator of my invention is adapted to handle wet materials such as garbage or sewage. I have found that it is desirable ,to drain the free liquid from thisrefuse before the refuse is introduced .into the chamber of the incinerator.

t is accordingly one of the. objects of this invention to provide an incinerator in which therefrom before the refuse passes into the incinerator chamber.

If Wet refuse is dropped directly onto the fire, the fire is partly extinguished and improper combustion will take place.

4 It is an object of this invention to provide an incinerator in which wet or damp refuse shaking grate.

the free-liquid ofthe refuse may be drained showin porting members forsupporiting the refuse in the chamber during drying.

Another object of the invention is to provide an incinerator having fuel supporting members formed with air intake passages open to-t'he exterior iand communic'ating with the interior thereof through openings "arproducts of'combustion. V A further object of the invention'is to .pro-

vide an incinerator in which dry combustible refuse may be dropped directly to the bottom of the incinerator directly to the fire. I

A still further object'of theinvention is to provide an incinerator having an improved Other objects and advantages o'f the'in'vention "will be made evident the'following description. i 7 Re' ferringt'o the drawin s in which I fl lastrate my invention,

Fig. 1 is a vertical view partly sectioned of a preferred form of the invention.

Fig.2 is a vertical sectiontaken on the line 2-2 of Fig. '1. V

Fig. 3 is a horizontal section taken on the line 33 of Fig. .1. v

Fig. iis an enlarged fragmentary view of the shakinggrate oftheii'ivention.

Fig. 5 is a section taken on the line 5 5 of Fig.4.

Fi 6 is a vertical section through a "third fcrmeft'he invention.

"Fi 7 is a "section "taken on the line 7+7 of Fig. 36. fl

Fig. 8 is enlarged g a water-cooled 'fa'e'l supporting arm of the invention. i

Beferringte Figs. 1 to 5 inclusive, the preferred arm of the invention will be the scribed. The numeral 20 represents the furnace of the incinerator, this furnace providing achamber 23. The chamber 23 is divided into a lower fire or combustion chamber 22, a secondary treating chamber 21 superposed above said combustion chamber and a primary treating chamber 21 superposed above said secondary treating chamber. Connected to the upper part of the chamber 21 is a conduit or exit flue 25 which is connected to a stack 24. At the lower part of the furnace 20 are shahing grates 26 which define the lower end of the fire chamber 22. The shaking grates 26 are shown in detail in Figs. 4 and 5. The shaking grates 26 are provided at their ends with trunnions 28 which are pivoted to longitudinal bars 29 supported by the furnace 20. Referring to Fig. 1, two of the bars 29 are supported by the main walls of the furnace and two of the bars are supported by a central beam 30 of the furnace. Attached to the shaking grates 26 near the free ends thereof are links 33, these links being pivotally attached to the shaking grates by pivots 34. The lower ends of the links 33 are pivotally attached by pivots 35 to a longitudinal connector bar 36. The connector bars 36 are provided with rollers 37 which are adapted to run in longitudinal channels 38. Attached to one end of the connector bars 36 is a cross bar 39 to which an operating rod 40 is attached. When the operating rod 40 is in the position shown in Fig. 4, the shaking grates 26 are in normal or supporting position. The rod 40 may be moved in a direction indicated by the arrow 41 so that the shaking grates 26 are moved into dumping positions as indicated by dotted lines 42 of Fig. 4. \Vhen in the position indicated by dotted lines 42, the ashes and coals or any other residue are dumped from the fire chamber 22. hen it is desired to remove some of the ashes therefrom this is accomplished by moving the shaking grates 26 a small distance from normal position in rapid succession so that the fuel in the fire chamber will be agitated. The operating rod 40 may be operated by a piston 44 which is placed in 'a cylinder 45. The piston 44 can be moved back and forth by hydraulic pressure applied to the cylinder 45. Refuse is supplied to the chamber 23 by means of hoppers provided at the upper end of the furnace 20. Each hopper 50 has diagonal side walls 51 which converge in a downward direction. End walls 52 of each hopper 50 are vertical. Attached to the end walls 52 are slides 53 which may be formed from angle in their path of movement.

Figs. 1 and 2 they close the opening in the bottom of the hopper. By elevating the rod 57 the doors may be moved into a position indicated by dotted lines 59 so that the bottom of the hopper is open. Each of the hoppers has the side walls provided with perforations 61 which connect to drain spaces 62. The drain spaces 62 have liquid drain pipes 63 connected thereto. them very wet refuse is placed in the hoppers 50, any free liquid may drain therefrom through the openings 61 and into the spaces 62. The drained liquid passes from the spaces 62' through the pipes 63 to a suitable point of disposal.

For the purpose of supporting the refuse when it is dropped into the chamber 23 from the hoppers 50 I provide primary upper and secondary lower fuel supporting means indicated by numerals 66 and 67. The lower fuel supporting means 67 defines the lower extent of the secondary treating chamber 21 and the upper extent of the fire chamber 22, and the upper fuel supporting means 66 defining the lower extent of the primary treating chamber 21 and the upper extent of the secondary treating chamber 21*. The upper and lower fuel supporting means are identical so that a description of one will suflice for both. Placed in opposing side walls 68 of the furnace are bearings 69. Extended through the bearings 69 are fuel supporting arms 7 O. The fuel supporting arms 7 0 shown in Figs. 1 to 3 are provided with air inlet passages 71. The outer ends of the passages 71 are open to the atmosphere and the inner ends are connected to the chamber 23 by small openings 73 which are formed in the extreme inner pointed ends of the arms on the lower sides thereof, said pointed inner ends permitting the arms to be forced more readily inwardly through such material as may be It should be noted that the arms of the upper and lower supporting means are divided into piers which extend into the chamber 23 from the opposite sides thereof. These arms may be moved from positions similar to which the lower arms 67 in Fig. 1 occupy, into positions similar to which the upper arms 66 in said Fig. 1 occupy. The moving of these arms is accomplished by the following mechanism.

Each of the arms 70 is provided with a rack 76 at the outer end thereof. Adapted to engage each rack 76 is a pinion 77 mounted on a shaft 78. There are four shafts 78, one for each set of arms 70. Each shaft 78 is supported by a bearing bracket 79. Attached to one end of each shaft 78 is a pinion 80 which is engaged by a rack 81. Each rack 81 is formed on the end of a piston rod 82 which extends into a cylinder 83. A piston 84 is attached to the inner ends of each of the rods 82 and is adapted to be operated in its cylinder 83 by hydraulic pressure placed thereon. Hydraulic pressure may be placed 'on either side of the pistons 84 by pipes'86 or outward according to the direction of'rotation of the pinions 77. Each set of, arms 7 0 is operated by a separatehydraulic means so that refuse dropped intofthe chamber 21 from the hopper may be lowered to the fire chamber 22 by operating the arms 70. Placed in the chamber 23 and extending through both treating chambers, arevertical piers 90 which are provided for the purposeof preventing the refuse from packing against, the walls of the chamber 23, thus destroying the draft. The piers 90 provide draftspaces 91 there between. The piers shown in Figsl to 3 are composed of sheet metal and have circulating spaces 92 formed therethrough. The upper ends of the piers 90 are connected to the 1 upper part of the preparing chamber .The upper ends of those piers 90 adjacent to .vided with horizontal legs 96 which extend outward through the furnace 20 and communicate. the lowerends of the draft passages 92 to the exterior. Cooling air is drawn into the lowenends of the piers 90, this cooling airpassing from the upper ends thereof into the upper part of the primary treating chamber 21 andthrough the conduits The air is caused tov circulate through the piers 90 by reason of the fact that the piers are heated and thus the air therein is heated and caused to'move upward. This draws additional cool air into the piers and prevents them. from overheating. v

Referring particularly to .Fig. 1, inthe stack 24 I provide a means for condensing the odorous gasesfrom the products of combustion. This means has a. pan 100' which has a central opening 101 and provides an annular trough 102. Supported above the pan 100 by a vertical arm 101 is a dome 103. Extended through the wall of the stack 24 is a liquid supply pipe 105 which is adapted to 'drop fluid onto the apex of the dome 103. The water flows down the upper face of the dome 103 and into the trough 102. The water falls in the form of an annular film through which any gas passing through the stack must pass. The liquid fills the trough 102 andfoverflows, passing through through this second film. Any odorous gases carried with the gases of combustion are condensed when they strike the films} of water and drop with the water to the lower part of the stack. The lower part Ofthe stack is provided with a chamber 107 in which the water may cool. Whenthe water reaches a certain height it may pass from the stack through an overflow pipe 108'. The operation of this form of'the invention is substa-ntially as, follows: i

In starting up the incinerator 1t is,nec es.-

sary to place combustible material in the fire chamber. ReferringtoFigs. 2 and 3, it will be seen that near one end of the furnace there are no fuel supporting arms' 70. Combustible material placed in the left hopper 50 in Fig. 2 will drop directly to the fire chamber Refuse which is damp or otherwise not in condition for combustion is placed in the right hopper 50. The upper fuel supporting means 66 is moved into the position indicated by dotted lines 112 of Fig. 1. The refuse is retained in the right hopper for a short period of-time so that any free liquid may dra in therefrom, as previously explained. The lift rodf57j is then pulled upward and the doors '55 are moved into openpositi'on. The refuse drops into the upper part of the preparing chamber 23, being supported by the upper arms 70. Therfire, having been'started in thefire chamber 22, evaporates the moisture in the refuse retained in the treating chamhere in the upper part ofthe c'liamber'23. When this, charge of refuse has beenpartly dried, the upper arms 66 are returned to the positions shown by full lines in Fig. 1. This permits the partly dried charge to drop onto the lower fuel supporting means 67'. Immediately after this,;thc upper fuel supporting arms 66 are returned to dotted line position and a new charge is dropped thereonto.

The lower fuel supporting arms 67 are then retracted into positions indicated by dotted lines 114 of Fig. 1. .After it has dropped onto the lower fuel supporting means 67' the charge of refuse becomespre-pared forburnmg, and when the arms 67 are retractedmto the positions indicated by'dottedh'nes 114 part of thecharge will drop into thejfire chamber 22. The charge will continually drop intothe fire chamber as the fuel already in the fire chamber burns away. In'case of amming of any sort, the lower fuel supportmg means may be moved back and forth, thus loosel'nng the. charge'and caus ng Itto fall lnto the fire chamber. When the charge in the lower treating h mber 21 has been entirely droppedinto the fire chamber22,

the lower fuel supporting means 67 .is returned to the position shown by full lines, and the upper fuel supporting means 66'is moved to the full line position, thus dropping. the upper charge onto the lower fuel supporting means. The vertical piers 90, as

previously explained, prevent the refuse from packing against the walls of the furnace 20.

This evaporation of moisture from the suspended refuse is effected rapidly and thoroughly by reason of the particular arrangement of the elements constituting the furnace. It will be evident that if the treating chamber did not have the vertical piers 90 and draft passages 91 and was filled with a mass of damp refuse, all of the products of combustion and all of the vapors generated in the lower portion of the mass adjacent the fire, would, to reach the exit flue, have to travel through the entire damp mass. It has been found that such vapors will start to condense at a very small distance above the bottom of the mass and'that before having traveled to any considerable extent through the moist mass they will be fully condensed, this condensate together with additional moisture combined therewith in the process of condensation, drops towards the heating zone and in a short time this vaporization and condensation will reduce the mass to a wet compact mass incapable of being dried and burned by the heat available in the furnace; in fact such wet compact mass will cut off the draft of the furnace to such an extent as to smooth the fire and with certain characters of refuse the returning moisture is at times of such volume as to drip from said mass and put out the fire.

In the present apparatus, this undesirable condition is eliminated by insuring an immediate escape of the vapors or an escape thereof before condensation can take place.

This is the major function of the piers 90 and draft passages 91 which cooperate with the horizontal arms 67 to insure a certain draft condition which will insure the desired result. As the draft passages 91 extend from the top of the combustion chamber 22 to the exit flue at the top of the furnace the products of combustion in the chamber 22 will flow therethrough direct to the eXit flue, thus creating a pronounced upward draft surrounding the refuse. This will convey any gases or vapors given off from or conveyed to the outer periphery of the refuse mass at any level, directly to the exit flue. the refuse on the arms 67 is dried said arms are retracted gradually and the dried refuse will enter the combustion chamber as the material therein is consumed, and the retraction of said arms creates an open space above the center of the combustion chamber the fire will advance into such central open space and form an arch-shaped burning mass in the center of the furnace just above the arms 67, which burning mass will create a high temperature zone in the lower center of the secondary treating chamber, gradually becoming wider as the arms 67 are retracted. By reason of this and the disposition of the as previously explained.

draft passages 91, the higher temperature products of combustion and the produced vapors are drawn laterally through the lower layer of the refuse resting on the arms 67 directly to the passages 91, thus disposing of said vapors before they have had time to condense. This action is materially assisted by the volume of free air entering said zone through the ports 73 of the arms 67.

As shown in the plan view of Fig. 3, draft spaces 91 are provided between adjacent piers 90 through which the draft may pass. In the incinerator of this invention it is abso lutely impossible for the draft to be de stroyed. The fuel supporting arms 70 are cooled in this form of the invention by a current of air which passes inward through the air inlet passages 71 thereof. The draft of the furnace pulls the air through the opening 7 3 at the inner ends of the supporting arms 70, thus creating the current of air which cools said arms and also tends to promote better combustion in the furnace. The vertical piers 90 are prevented from overheating and burning out, by a current of air which is induced t-herethrough by the heating of the piers. As previously explained, the heating of the piers heats the air therein, causing it to move upward. This draws cool air into the lower ends of the piers and thus the circulation is established. The ashes may be removed from the fire chamber 22 by operating the shaking grates 26. This is accomplished by operating the piston 44in the cylinder 45,

The gases of combusti on and any gases formed from the refuse are drawn promptly into the draft passages 91 and pass through the conduits into the lower end of the stack 24. The gases must pass through the device of the invention for condensing the odorous gases therefrom. As previously explained, the gases must pass through two films of water before they can pass outward from the stack 24. The con tact of the gases with the water condenses any of the odorous gases carried by the gases of combustion. The films of water also collect any fine solid particles which may be carried in the gases of combustion.

In Figs. 6, 7, and 8, I illustrate a third form of the invention. This form of the invention has a furnace 150 which consists of an inner shell 151 and an outer shell 152. there being a space 153 provided between these two shells through which water may be circulated by pipes 155 and 156. The water circulated through the space 153 prevents an overheating and a burning out of either of the shells, particularly the inner shell 151. The furnace 150 provides a large chamber 157, to the upper end of which is connected a refuse inlet opening 158. The upper end of the inlet opening 158 is closed by a lid 159. At the lower part of the chamber 157 are shaking grates 162 which are identical with the shah 4 r 188 which extend through stufling boxes 189 ing grates 26 provided in the first form of I the invention. Since the construction is identical, the construction of the shaking grates 162 neednot be described. This form of the invention like the first formincludes an upper fuel supporting means 16s and a lower fuel supporting Inean's 165." 'The upper and lower fuel supporting 'means have fuel supporting arms 168 which extend into the lchamber 157 from the opposite sides thereof. The fuel supporting arms 168 are constructed substantially the same as the fuel supporting arms 70. i

As illustrated in 8, thimbles 170 are extended through walls of the furnace 150, these thiinbles providing bearings 171 for the arms 168. The inner ends of the armshave no openings as were provided 1n the arms 70. Attached to theouter ends ofthe arms 168 are heads l73dfrom which septums 174i extend. The septums 174 extend to the inner ends of the arms 168 dividing them into passages 17 6. Connected to the heads 17 3 below the septums 17 1 are pipes 178 and connected to the heads 17 3 above the septums174c are pipes 179. The pipes 179 are connected to inlet headers 180 and the pipes 178 are connected to outlet headers 181. 'Referring to Fig.7, the inlet headers 180 which are arranged on'opposite sides of the furnace have inwardly extending legs 183. "These IegsISS extend through stufling boxes lj84c into a barrel 185. Cooling fluid, such as water, is supplied to the interior of the barrel 185 by means of a pipe 186. This fluid passes into the ends of the legs 183, through the inlet headers 180, through the pipes 17 9 and into the upper passages 1760f the-arms 168. The

outlet headers 181, which are located below the inlet headers. 180, are provided with legs into a barrel 190. Water is conducted from the barrel lbymeansof apipe191. The water passes inward through the upper passages 17 6 around the ends of theseptums 1 7 1 and outward through the lowerpassages 176.

The water then passes through the pipes 178, the outlet header 181, the legs 188, and into the barrel 190, the water being conducted from the barrel through the pipe 191. This form of the invention is provided with vertical piers 200 which are provided for the purpose as in the other formsfofthe invention, preventing the refuse from packingagainst the wall and thus destroying the draft. In

this form of the invention the piers I200 formed integrally with the inner shell 15-1.

The inner shell 1'51-is provided with inwardly extending walls 202, theinner ends of which are connected together by walls 203. This structure formsjthe piers 2 00; It should be noted 7 that in this form of. the invention the piers 200 are cooledbypthe saine water which is circulated through the space 153be-tween the shells 151 and 152. i

In the form of the invention whioh am now describing, the cooling is' 'aceol'nplished of the invention, The operation of the up per and lower fuel supporting means 164 and 165 is similar to that in the firs't form of the invention. Referring to Fig; 6, the arms 168 are provided with racks 206 which are engaged by 'pinions 207.1 Thep'in'ions207 are mounted on shafts 2 08 whicl i extend across the sides of the furnace. Itfshould be noted that there are four shaftsf208,"one for each series of arms 168; The shafts 208 are supported by suitable brackets 210 as illustrated. In this form :of the invention the arms 168 are not operated by hydraulic means but by "manual means. The lower shafts 208 are provided with cranks '211.

vision of the vertical piers for preventing the refuse from packing against the wall of the incinerator, thus destroying the, draft.

This 'is quite important since if the draft i'sde'stro'yed the [fuel will not'be b urned properly. It is quite important that these plersbe. placed close to the wall o ffthe furiiace and preferably against the walls of the furnace as illustrated in the drawings.

Another feature of the invention isthe means for cooling the jpiers. This may be either a circulation of air or a circulation of water throughthem. V I

The featureof draining the liqu'ic'l from the refuse before it is introduced 'intothe furnace is important since the free-liquid is in this 'way disposed of and there isn'o danger of its flowing onto the fire. Avery important part of theinvention is the-adjustable fuel supporting arms, by means of which the charges may be dropped, at proper times when they are properly dried, into the fire chamber. The feature of removing the odorous gases from the products'of combustion of the incinerator is highly important. It is believed that this lpartof the invention useful in other types of incinerators or furnaces than the u v onesiuusneted in the drawlngs. I i

In the foregoing-description I have i'll us-' U trated'various forms of the invention. It should be understood,.however,that the invention may be embodied in difierent forms of construction without violating the scope of the invention.

I claim as my invention:

1. In an incinerator of the nature disclosed, the combination of: a furnace having a lower combustion chamber, a treating chamber superposed above said combustion chamber and an exit flue leading from the upper portion of said treating chamber, whereby all of the products of combustion must pass through said treating chamber; means for introducing into the upper end of the treat- .ing chamber, material to be consumed; ma-

terial supporting means defining the upper extent of the combustion chamber and the lower extent of the treating chamber, said means consisting of opposed series of horizontal arms mounted to slide into and out of the furnace chambers while either or both chambers are filled with said material; and means for reciprocating said arms, there being draft passages disposed around said treating chamber and extending from said supporting arms upwardly to communication with said exit flue and serving to direct the products of combustion through the peripheral portion of said treating chamber so that the draft so created will draw vapors and gases from any level of said treating'chamber directly to said exit flue.

2. A combination as defined in claim 1 in which the draft passages are formed by vertical piers disposed near the wall of the treating chamber, the piers serving to prevent packing of the material against said wall.

3. A combination as defined in claim 1, in which the draft passages are formed by vertical hollow piers disposed near the wall of the treating chamber, the lower ends of said piers terminating above said combustion chamber and communicating with the exterior of the furnace and their upper ends being in communication with the upper end of said treating chamber.

4. In an incinerator of the nature disclosed, the combination of: a furnace having a lower combustion chamber, a treating chamber superposed above said combustion chamber and an exit flue leading from the upper portion of said treating chamber, whereby all of the products of combustion must pass through said treating chamber; means for introducing into the upper end of the treating chamber, material to be consumed; material supporting means defining the upper extent of the combustion chamber and the lower extent of the treating chamber, said means consisting of opposed series of horizontal arms mounted to slide into and out of the furnace chambers while either or both chambers are filled with said material; and means for reciprocating said arms.

5. A combination as defined in claim 4, in which the inner ends of said horizontal arms are pointed so that they may be forced inwardly through material contained in said furnace.

6. A combination as defined in claim I, in which said horizontal arms are provided with air intake passages open to the exterior of the furnace and communicating with the interior thereof through openings formed near the inner ends of said arms, the air passing through said intake passages serving to cool said arms and to promote combustion.

7. In an incinerator of the nature disclosed, the combination of: a furnace having a lower combustion chamber, a secondary treating chamber superposed above said combustion chamber, a primary treating chamber superposed above said secondary treating chamber, and an exit flue leading from the upper portion of said primary treating chamber, whereby all of the products of combustion must pass through both treating chambers; means for introducing into the upper end of said primary treating chamber, material to be consumed; primary material supporting means defining the upper extent of said secondary chamber and the lower extent of said primary chamber; secondary material sup porting means defining the upper extent of said combustion chamber and the lower. extent of said secondary chamber, each of said means consisting of opposed series of horizontal arms mounted to slide into and out of the furnace chambers while either or both adjacent chambers are filled with said material; and means for reciprocating said arms, there being draft passages disposed around said treating chambers and extending from said secondary supporting arms upwardly to communicate with said exit fine and serving to direct the products of combustion through the peripheral portions of both treating chambers so that the draft so created will draw vapors and gases from any level of either of said treating chambers directly to said exit flue.

8. A combination as defined in claim 7 in which the draft passages are formed by vertical hollow piers disposed near the walls of both treating chambers, the lower ends of said piers terminating above said combustion chamber and communicating with the exterior of the furnace and their upper ends being in communication with the upper end of said primary treating chamber.

9. In an incinerator of the nature disclosed, the combination of: a furnace having a lower combustion chamber, a secondary treating chamber superposed above said combustion chamber, a primary treating chamber superposed above said secondary treating chamber, and an exit flue leading from the upper portion of said primary treating chamber, whereby all of the products of combustion must pass through both treating chambers; means for introducing into the upper end of said primary treating chamber, material to be consumed; primary material supporting means defining the upper extent of said secondary chamber and the lower extent of said primary chamber; secondary material supporting means defining the upper extent of said combustion chamber and the lower extent of said secondary chamber, each of said means consisting of opposed series of horizontal arms mounted to slide into and out of the furnace chambers while either or both adjacent chambers are filled with said material; and means for reciprocating said arms. l

10, In an incinerator of the class described, the combination of: a furnace having a fuel treating chamber; means for introducing fuel into said chamber; a stack for said furnace; a conduit connecting said chamber and stack; fuel supporting means extended into said furnace, said fuel supporting means be ing provided in the form of horizontal arms extended into said furnace from opposite sides, said arms having passages extending therethrough communicating with the atmos-' phere at their outer ends and with the interior of said chamber at their inner ends, so that the draft of said incinerator will draw air through said arms; vertically disposed hollow piers connected to the walls of said chamber and having their lower ends terminating above said fuel supporting arms, the upper ends of said piers having openings communicating with said conduit; and means for moving said supporting arms to deposit 7 the fuel into the lower part of said furnace.

11. Inan incinerator of the class described, the combination: a furnace having a fuel treating chamber; means for introducing fuel into said chamber; a stack for said furnace; said furnace having a conduit leading to said stack; fuel supporting means comprising hollow arms extended into said furnace from opposite sides, said arms opening to the atmosphere at their outer ends and to said chamber at their inner ends, so that the draft of said furnace will draw air through said arms; vertically disposed hollow piers connected to the walls of said treating chamber and having their lower ends open to the atmosphere and their upper ends communicating with said conduit; and means for moving said arms to deposit fuel into the lower part of said furnace. V

12. In an incinerator of the nature disclosed, the combination of: a furnace having a lower combustion chamber, a treating chamber superposed above said combustion chamher and an exit flue lea-cling from the upper portion of said treating chamber, whereby all of the products of combustion must pass through said treating chamber; means for introducing into the upper end of the treating chamber, material to be consumed; material supporting means defining the upper extent of the combustion chamber and the lower extent of the treating chamber, said means consisting of opposed series of horizontal arms mounted to slide into and out of the furnace chambers while either or both chambers are filled with said material, said arms being provided with air intake passages open to the exterior of said furnace and communicating with the interior thereof through openings arranged adjacent the inner ends of said arms, the air passing through said intake passages serving to cool said arms and to promote combustion; and means for reciprocating said arms.

13. In an incinerator of the nature disclosed, the combination of: a furnace having a lower combustion chamber, a secondary treating chamber superposed above said combustion chamber, a primary treating chamber superposed above said secondary treating chamber, and an exit flue leading from the upper portion of said primary treating chamber, whereby all of the products of combustion must pass through both treating cham bers; means for introducing into the upper end of said primary treating chamber, material to be consumed; primary material supporting means defining the upper extent of said secondary chamber and the lower extent of said primary chamber; secondary material supporting means defining the upper extent of said combustion chamber and the lower extent of said secondary chamber, each of said means consist-ing of opposed series of horizontal arms mounted to slide into and out of the furnace chambers while either or both adjacent chambers are filled with said material, said arms being provided with air intake passages open to the exterior of said furnace and communicating with the interior thereof through openings arranged adjacent the inner ends of said arms, the air passing through said intake passages serving to cool said arms and to promote combustion; and means for reciprocating said arms. 7

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 15th day of November, 1926.

FELIX 0. DE CARIE.

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