US1469046A - Loading machine - Google Patents

Description

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Sept 25, i922..

P. J. WDONALQ LOADING MGHNE iled June 22. 1922 e sheetssheei; 1

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' Sap@ 25, w23, A www@ P. J. MCDONALD LOADING MACHINE 'Filed June 22. 192,2 e sheets-sheet 2 ATTORNEYS.

SW@ 25 m23., P. J. MCDONALD LOADING MACHINE Filed June 22 1922 6 Sheets-Sheet 3 ATTORNEY.v

sew. 25, 1923.

P. J. MCDONALD LOADING MACHINE Filed June 22. 1922 6 Sheets-Sheet 4 ATTORNEYS.

Sem 25. w23" p, L MCDONALD LOADING MACHINE Filed June 22, 1922 6 sheens-Sheet 6 Patented Sept. 25, 1923.

intacte PATENT carica;

PATRICK J. MCDONALD, F NEW CUMBERLAND, PENNSYLVANIA.

' LoADINGMA'CHINE.

Application ledune 22,1922. Serial No. 570,212."

To all whom t may concern:

Be it known that I, PATRICK J. MODON-v ALD, a' citizen of the United States, residing at New Cumberland, county of Cumberland,

State of Pennsylvania, have invented a new.

and useful Loading Machine, of which the following is aspecification.

novel construction of. 'a loading machine which is especially designed to be used to remove snow from public roads, compress it to a fraction of its original volumearid load the compressed snow into any kind ofya conveyor.

l5 streets, State roads, steam'roads and trolley lines and can be mounted on tractors or' on standard gage railroad trucks'. .llt is also designed to be employed for gradingfstreets and roadsof any kind or for loading loose material such as iron ore, coal, sand orvthe like and is adapted tosbe employed in the soft ground of tunnels'and subways for removing material. It further comprehends a novel loading v machine wherein l employ a novel construction and arrangement of a multiple bladed collecting scoop and novel construction and arrangement of conveyors adapted to receive the material discharged from-sald'scoop and l discharge it to other mechanism.

vIt further comprehends novel y.means for causing a circulation of y a temperature changing mechanism to dil/ferent parts of the mechanism. f v

It further comprehends a novel construction and arrangement of an auxiliary conveyor which is capable of rotary adjustment.

It further comprehends novel means for 'heating various parts withwhich the snow comes into contactv during the operation of the machine.

Other novel features of construction and advantage will'hereinafter lmore fully appear in the detailed description and the appended claims.

For the purpose of illustrating my invention, I have shown in the accompanying drawings a typical embodiment thereof which is at present preferred by me, since this embodiment will be found in practice to give satisfactory and reliable results. lt

is, however, to be understood that the va# rious instrumentalitles of which my invenlft is adapted lto be -employedon `tion consists can be variously arranged.

organized 'and that myinve'ntion is not liniited to-'the precise arrangement and organization of these instriimentallitiesfas therein shown and described.` p

' Figure 1 represents, in side Yelevation,v a

y 4loading machine, embodying my invention/ My present invention comprehends a Figure 2 represents a vsection on line 2 2 Y of Figure 1. y l Figure 3 represents, fin front elevation, a portion of themachine."

Figure 4 represents a section on line 4-44 of FigureB.v

Figure 5 represents, in sectional elevation, conveyor mechanism employed. f l

Figure 6 represents, in section, another .conveyor mechanism employed. f

Figure 7 represents asection on line 7 7 Figure 3. f k

Figure 8 represents, diagrammatically, the driving mechanism. l y

Figure 9 represents, in side elevation, and partly in section, a snow removing element and plough in conjunction with a portion of the conveyor mechanism.

Figure 10 represents in section a fuel supply tank and certain of its adjuncts.

Figure 11 represents in Asectional elevation, a loading element, in conjunction with which fuel supply tanks similar to lthat seen in Figure 10 are employed.

Figures. 12 and 13 represent diagrammatic4 side elevations of the oil and water circulating systems.

Figure 14 represents a vertical sectional view through the rotary sh0vel,showing the hollow trunnions and water and oil connections.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings.

1 designates a supporting framework which, as seen in Figure 1, is mounted on a tractor of the caterpillar type having the caterpillar treads 2 which may be coupled in any suitable manner, and are driven from the shaft 3 having the sprocket wheel 4. which drives the chain 5, which'passes over the sprocket wheel 6 mounted on the shaft 7, which carries the larger sprocket wheel 8 which drives the chain 9, which. passes aroundthe sprocket wheel 10 mounted on the shaft l1. v

The chain or endless apron 9 carries the caterpillar treads 2, and it will be apparent that the rotation of the shaft 3 by the motor 12, t-o be referred to, in the desired direction will eifectthe propulsion of the tractor. The framework 1 supports a prime motor 12 of any desired construction, by which the main shaft 13 is rotated, ysee Figure 8, said` shafthaving the outer bevel gear 14 thereon. The main shaft 13 has an inner bevel gear 15 thereon (see Figure 8) which is in mesh with the bevel gear 16, whereby the shaft 17 is rotated, said shaft being` provided with a transmission' 18"anda brake connection 19, :as seen in Figure 8, and being operatively connected with the drive shaft 3 by a sprocket chain or equivalent means 19X of resaca@ at 51 (see Figure 4). v The ,star-shaped body structure of thev rotary shovel 44 may be composed of sheet vmetal plates which are suitably assembled and `joined together in any convenient man-.

ner, the outer converging'terminals of the outer plates 47 being tied together and re# inforced by the terminal transverse pointed members 52which are provided with inner flanges 52X secured to the members 47 in any suitable manner, the outer points 53 of said the tractor structure which l have designated /terminalmembers being coincident with the as 20 in Figures 1 and 8, rlllhe bevel gear 14 seen in Figures 1 and 8 is in mesh with the. bevel gear 21, which drives the shaft 22, which is provided with a transmission 23 and a brake connection 24,/said shaft carry# ing the bevel gear 25, which is in mesh with the bevel gear 26, which is mounted on the shaft 27, which carries the sprocket wheel 28. rll`he sprocket wheel 28 drives the sprocket chain 29, which drives the sprocket wheel 30 mounted on the hollow shaft 31, on which is supported the rotary shovel 32, whose construction will be apparent from Figures 3, 4 and 9. There may be two of the sprocket wheels 3() as seen in Figure 14,

' or only one as may be desired. rllhe hollow shaft 31 which carries the sprocket wheel 30v andthe rotary shovel 32 is mounted in oppositely located suitable boxes or bearings 33, one of which is shown in Figure 1, said bearings being capable of being raised or lowered through the medium of the chains .34, which are located on opposite sides of the machine and pass around the drum 35, mounted on a shaft 35 which is provided with the gear 36 in mesh with the worm 37.

38 designates th worm shaft upon-'which the worm 37 is mohnted, said shaft rotating in suitable bearings 39 and 40 and having a handwheel 41 for rotating it, whereby it will be apparent that the rotation of the rod 38 and the worm 37 will rotate the gear 36 and the drum 35, thereby winding or4 unwinding the chain 34 thereon so as to raise or lower the boxes or housings 33 forthe hollow shaft 31, whereby the position of the rotary shovel 32can be adjusted vertically, according to the requirements of the work tobe done.

The rotary shovel seen in Figures .3 and 4 is composed ofthe side plates. 42, which are provided with the serrations 43 whose contour will be understood from Figures 4. 9, 12 and 13, and the space between the side plates 42 is occupied byI the body 44 of the rotary shovel, which is composed of the inner star-shaped member 45 composed of the transverse troughs terminating in .the

tooth portions 54/ of the side plates 43, as will `be understood from Figures 4 and '9.' The outerpoints 53-may be hardened by any suitable process to 'prevent wear, and a rotary shovel is thus produced having thel `outer serrated cutting edges 43, the transverse blades or points 53 and the intermediate transverse trough shaped portions, as seen in Figure 4. i

lt will thus be apparent that' a very rigid,

durable and powerful rotary shovel body is provided, which will be durable'and etlicient under all conditions.

lt' will be understood that as -the rotary shovel 32 is rotated, the snow or other material which is excavated or taken up thereby will be thrown rearwardly upon the endless The worm 61` is mounted on the shaft 62,

unison both the rotary shovel, 32 andthe conveyor belt 55, .the lattertravelling over and beingsupported by the intermediate rollers 64, which may ybe of any desired' 'number or construction, and mountedy or supported in any suitable bearings.

The main shaft 13 carries4 a pulley or sprocket wheel 65, see Figure 8, which drives the compressor belt 66, see Figures 5 and 8, said compressor belt driving the-roll 67, which is mounted on the shaft 68. The roll 67 drives the compressor apron 69 which passes around the rollers 67 and 70, the general arrangement and position of the endless compressor apron 69 and the endless conveyor apron 55 being apparent from Figure 5 and from the dotted lines inl belt drive 66 for the sake of clearness of illustration.

l have termed the endless apron 69 as a compressor apron, as its function is to compress the snow or other material which is thrown upon the conveyor apron by the rotary shovel 32, and I preferably collocate said compressor apron 69 with respect to the conveyor apron 65, as seen infFigure 5, so that said aprons converge upwardly so thaty the entrance opening between said apron as indicated at 71 is larger than the discharge space indicated at 72, whereby the snow or other material will be thrown upon the conveyor apron 55 will be compressed or compacted as 1t travels upwardly on the conveyor 55.

1t will be understood that the shafts on the rollers 67 and 70 are mounted in suitable bearings or housings and that convenient adjust-merits which it is unnecessary kto describe in detail maybe provided for keeping the aprons 55 and 69 Vat all times sufficiently taut. The rotary shovel 32 is mounted in a suitable front framework or housing n' 73 whose general contour will be understood from Figure 3, being of inverted U-shape and composed of metal platesproperly reinforced or bolted' together. Above the frame 73 is pivotally secured' the inverted ll-shaped member or hood 7 4f which is pivotally secured at the points 74X (see left hand ofFigure 1) and is adjusted by the' rod 73 which is actuated by the handle 72X, said hood serving to deflect the material towards the rotary shovel 32.'

The front vertical plates 75 of the inverted U-shaped housing seen in Figure 3, are provided on each side with the vertical slots 76, through which pass the bolts 77, which also pass through the upwardly extending rear plates 78 which support the bottom shoe members 79 having the forward pointed ends 80 the object of this construction beingl best understood from Figure 7 and being to permit the raising or lowering of the side shoes 79 according ,to the character of the work to be done which can be quickly accomplished by loosening the bolts 77, as is evident.

ln Figure 2, li have shown an enlarged sectional view of the bearings for the lower roll 56 of the conveyor apron 55,-the shafts v57 of said lower roll 56 being mounted in the bearings 81 carried by the side frames 1t will be apparent that when the rotary shovel seen in Figure 4 is employed for removal of snow that it is desirable to keep 'the same heated to the vrequisite degree,

which l eect by means of rthe water pipe 88 which leads from the water pump 89 seen 1n Figure 1 and .in the diagrammatic view `in Figure 13. The water pump 89 may be l and 9 into the upper portion 94eX of the' casing'121 and thence into the inlet pipe' 50, see Figure 4, the water'being withdrawn from the circulating system through the pipe 51 through which the water iiowsA to the pipe 87` on the opposite side of the trough 85 seen in Figure 2, and thence through the pipe 106 to the lower water box 108 seen in Figure 5 and as shown diagrammatically in Figure 13.

ln order to effectively heat the interior of the rotary shovel seen in Figure 4 and to keep the temperature in the water circulating system up to the desired point, ll. employ preferably a supply of oil andother suitable hydrocarbon which is contained in the oil tank 87 X and flows therefrom through the pipe 88X to thevoil pump 95, see Figures 8 and 12. The oil is forced by the oil pump seen in Figures 8 and 12 into the oil pipe line 100, see Figures 5 and 12, said oil pump being provided witha shaft 96, carrying the pulley 97, whichy is driven by the belt 98, which is driven from the pulley 99 mounted on the main shaft 13. 1t will consequently be apparent that as the oil pump is actuated,

the oil flows from the branches 102 to the branches 103 and thence to'the burners 104, access being had to said burners through ports 105.

1t will consequently be seen that when the burners 10d are ignited they will furnish an adequate-supply of heat for the interior of the rotary shovel and will heat the water which is contained in the water circulating system seen in Figure 4. v

ltwill be understood from the foregoing that through the mediumof the pipes 88, 87, 94 and 50 the forward portionof the apparatus is elfectively supplied with water which is heated by the burners shown. 1n orderto convey water to the conveyor appa- -llO The lower pipe'106 leads into the lU-shaped water box 108, see Figure 5,' from which water is conducted bymeans of the pipe 109 p .the deflector, as indicated at 128, is deflected into the hopper 133 by means of the rotary to thc next water-box 110 from .which the .pipe lll-leads to the next water box 112 from which leads the pipe 113 to the next water box 114 from which leads the pipe 115 to the next water box 116, the watei flowing therefrom through pipe 107 already described back to the water pump 89. The water is supplied to the system through the funnel 115X and the pipe 116x, see Figure 5.

ln order to heat the water contained in the water' boxes 103, 110, 112, 114 and 116, 1 employ a series-of burners which are indi cated at 117 and are fed with oil or suitable hydrocarbon through the pipe 113 common to all the burners, the inlet to said pipe 118 being through the pipe 100, wvliich leads from the oil pump 95, as alreadydescribed, see Figure 12.

lt will thus be seen from the foregoing that 1 make provision for supplying water to the spaces between the conveyor apron and for supplying the requisite quantity of oil or hydrocarbon to the burners 117 so as to effectively heat all the water boxes seen in Figure 5, said water boxes and burners being omitted from Figure 1 for clearness of illustration, but being clearly shown in.

Figure 5.

1f desired the exhaust from the engine 12 can Ybe conducted by the upper pipe 107 andthe lower pipe 106X to the upper and lower portions of the conveyor and utilized Vtween the rods 124 and 126. portion of the plow-casing at 04X is'hollow.

for `heating purposes, said pipes discharging thereinto at the' upper and lower points a and b (see Figure 5).

.etl the left-hand portion of Figure 1 and in Figure 9, 1 show an implement or plow" 120, whose lower end is mounted 1n the hous-v ing 121 containing the water coil 122, the upper ends of said coil communicating with the pipes 50 and 94, said implement 120 being mountedrnpon the actuating rod 124 which p asses through suitable guides as 125, A see Figure 1, and is actuated by means of' the handle 126, connected to the rod 126x, there being an elbow lever interposed be- 'lheupper and supplied with hot water as already explained.

lt will be apparent from the foregoing that as the shaft 13 1s rotated power is pro vided to propel the tractor 2O and in addition by means of the various connecting mechanisms', the shovel is Irotated and as the snow or other materialis excavated by ,recente `.the-rotary shovel, it is thrown backwardly upon the conveyor apron 55 and as the material is conveyed f upwardly' by said' apron it is compressed between the conveyor apron 69 and' passes from the upper portion of the conveyor apron over the guide or deflector 127 seen at the upper right-hand portion of Figures 1 and 5.

The snow or other material passing over device 129 mounted on the ,shaft 130 which is driven bythe belt 131 which is actuated by the sprocket wheel 132, sothat the material 128 is properlydeflectecl into the hopper 133, seen at the right of Figures 1 and 6.

the shaft 141v driven by the engine or motor 142. The engine shaft 141 is provided with a pulley 143 which drives the belt 144 which drives the pulley 145 on lthe shaft 146 of the water pump 147. The water is forced from the pump 147 through the pipe 148 into the water box 149, see Figure 6, from which the water flows to the pipe 150 to the water box 151, which is connected to' the water box 152 by the pipe 153. The water owing from said box 152 through the pipe 154 into the coil 155 from which the water flows back to the water pump through pipe 156, said coil l1551being contained in the tapered deilector 157. The walls of the hopper 135 "are provided with a chamber 158 in which the coil 159 isI contained, the water being conveyed into said coil 150 from the water box 149 by the pipe 160 and leaving said coil 150 through the pipe 161 which is connected to the water box 151, see Figure 6.

Referring to Figures 6 and 8, the manner of heating thewater boxes will be understood, the oil or hydrocarbon being forced from the oil pump 162, which is actuated by the pulley 163, belt 164 and pulley 165 mounted on the shaft 166.

1t will be apparent that the rotation of the shaft 166 will force the oil or hydrocarbon in the oil tank 162x, through the pipe 161X to the oil pump 162 into the pipe 167 and thence .to the burners 163, 169 and 17 0, which are located'in proximity to thewater boxes 152, 151 and 149, respectively, see Figure 6. l

The engine shaft 141 is provided with a transmission 171, and the main shaft 13 is also provided with a transmission 172,

'see Figure 3, which transmissions are actuated by `suitable controls, which need not be described in detail.

25 fed by gravity to the burners 185.

C3 scribe in detail.

The discharge mechanism seen at the right of Figure 1, is mounted on the foundation 1 and provided with rollers 173, and may be rotated in any desired direction by suitable means, as the wheel 174, mounted on the shaftk 175 which carries the pinion 176 in mesh with the stationary vannular rack 177.

Power can be applied to the wheel 174 by the shaft 177 and gearing 17 8, as will be evi- 3l@ dent to those skilled in the art.

lnV Figures l() and 11, l have shown 'another manner of heating the interior of ""'tlie rotary Ashovel 32, which I have SllOWn diagrammatically in-Figure 11, said shovel having the spokes 179 mou ted on the hubs 180` through which the sha t 181 passes to which the sprocket wheels E30 are secured. VThere arethrec compartments formed bythe spokes, and in each. compartment I locate the oil reservoirs182, which are each supl.ported by a pair of curved straps 183, which encircle the vball bearings 184, the construction being such that the oil reservoirs will always. hang vertical and the oil will be This construction dispenses with the piping seen in Figure 4. lin Figure 14, ll have shown in detail one arrangement of hollow trunnions for the oil and water connections seen in Figure V.4, whose construction will be apparent without" further description. l

ltwill be understood that the compressor apron 69 and its adjuncts are heated by means of'the branch ypipes 186 and 187,v which communicate with the water boxes `11() and 114 respectively, said pipes com? municatiiig with the hollow bearings of 'the rolls 70 and 67, whichare connected the outside pipe 188 shown in dotted lines l 40 in Figure 5.

The manually operated lever 189 seen in` Figure 5 serves to operate the belt scraper 190, vand the upper small rolls 191 and the lower small rolls 192 seen in Figure 5 serve to facilitate the crushing 'or the compacting of the snow or other material passing between the conveyer apron 55 and the comressoi apron 69, these rolls 191 and 192 eing mounted in suitable bearings of any character and are preferably 'positioned with respect to each other substantially as seen in Figure 5 within their respective aprons.

llt will be understood that the heating appliances shown in connection with the/rotary shovel and with 'the conveyor aprons are particularly useful when the device is used as a snow remover, and it will be apparent that when the device is used for grading streets or torloading loose material such as iron ore, coal, sand or the like, the water circulating and heating appliances may be dispensed with or thrown out of operation by the manipulation ofA suitable valves, which il have deemed it unnecessary to dellt'will be apparent that if desired the tractorconstruction seen in Figure 1 may be dispensed with and the apparatus can be,

mounted directly upon a standard gauge railway truck.

In Figure 4, l have shown the inner wall 45 of the rotary shovel as lined with asb'estos at the- .point indicated, which 'serves to re tain tl e heat within the shovel and l also show thepointed vdellector seen at the right of Figure 6 as similarly lined with asbestos at the point indicatedfor a similar purpose.

Having thusA `desbribed my invention, what l claim as new and desire to secure by Letters Patent, is

1. ln a device of the character stated, a rotary shovel composed 'of serrated side plates and a body portion composed of transverse blades vforming pointed teeth secured to said plates so as to provide pockets between said teeth, in combination with a conveyor apron located in the rear of said rotary shovel and adapted to receive the material thrown thereon from said shovel, and a compressor apron located above said conveyor apron and adapted to compress the material excavated by said shovel.

2. ln a device ot' the character stated, a rotary shovel of star shape in cross section `having pointed teeth and intervening pockets, an inclined conveyor in the rear of said shovel, acompressor apron above said conconveyor, a prime motor and power trans mission devices leading therefrom for actuating said shovel, conveyor and compressor apron in unison.

3. ln a device-of the character stated, a rotary yshovel of star shape in cross section having'pointed teeth and intervening pockets, an inclined conveyor in the rear 'of said 'veyor for compacting the material on said shovel, a compressor apron above said con- Aveyor for compacting the material on said raising and lowering said shoes, and means for locking said shoes in the desired adjusted position.

5.',In a device of the character stated, a rotary shovel, composed or" serrated side platespa body portion composed of'transverse pockets, -and blades terminating in transverse teeth, which extend between said side plates, vertically movabley boxes for Stipporting the journals of said shovel, and

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body portion composed of transverse pockets and transverse blades terminating in transverse teeth, which extend between said side plates, said body being composed of inner and 'outer members having a. space therebetween, hollow trunnions for said shovel, and water circulatin pipes located in said space and having their inlet and outlet passing through said trunnions for heating said shovel.

7. In a device of the character stated, a rotary shovel composed of side plates, a body portion composed of transverse pockets and transverse blades terminating in transverse teeth,'which extend between said side plates, said body being composed of inner and outer members having' a space therebetween, holl'ow trunnions for said shovel, and water circulating pipes located in said space and having' thyr inlet and outlet passing through said trunnions for heating said shovel, in combination with burners located within said and means for supplying hydrocarbon to said burners.

8. In a. device of the character stated, av

rotary shovel, an inclined conveyor in the rear of said shovel for receiving the material therefrom, means for actuating said shovel and conveyor in unison, and means for heating said -shovel and conveyor.

9. A hollow .rotary shovel,. hollow trunions therefor, .means for rotating said shovel, water connections leading through said hollow trunnions to the interior or the shovel, oil pipe connections4 lalso leading through said hollen7 trunnions, and burners supported within the interior of said shovel and in communication with said oil pipe connections for heating the interior of said shovel.

10. lin' a device 'of thecharacter stated. a

frame-work. a rotary shovel mounted in the front portion thereof and provided with transverse pockets and blades forming teeth, serrated side plates to which said blades and Ypockets are secured, a housing for said shovel having its lower front portion provided with shoes, means for vertically adjusting" said` said shoes,ia scooppivotally attached to the front of said frame-work and overhanging said rotary shovel, and means for raising and lowering the forward end of said scoop.

l2. ln a device of the character stated, a prime motor, a rotary shovel, power transmission devicesintermediate said motorand shovel for rotating the latter, a tank for hyported within the interior of said shovel and in communication with said oil connections for heating the interiorA of said shovel, a prime motor, a water pump for forcing 4water through said water connections, and shovel for heating the latter and said pipes,

an oil pump communicating with said burnf ers for forcing oil under pressure thereto.

14e. ln .a device of the character stated, a housing,'al rotary shovel mounted inthe frontportion thereof, an inclined conveyor at the rear of said rotary shovel, an upwardly movable implement located between the lower end of said conveyor, and the rear of said shovel, means for actuating said implement, a hopper located below the upper end of said conveyor, an inclined apron below said hopper for receiving the material discharged thereinto, and means for rotating said hopper and the apron below it in any direction to discharge the material eztcavated.

15. lin a device or the chaaracter stated, a housing, a rotary shovel mounted in the front portion thereof, an inclined conveyor at the rear or said rotary shovel, an upwardly movable implement located between the lower 4end or said conveyor and the rear of said shovel, means for actuating said implement, a hopper located below the upper end of said conveyor, an inclined apron below said hopper for receiving the material discharged thereinto, means for rotating said hopper and the apron below it in any direction to discharge the material excavated, means for heating the interior of said shovel, means for heating both of said conveyors, and means for heating the side walls or said hopper.

16. lln a device or the character stated, a housing, a rotary shovelmounted in Athe front portion thereof, an inclined conveyor at the rear of said i wardlylinovable implement located between the lower end oit said conveyor and the rear rotary shovel, an up-.A

recente of said shovel, means for actuating said implement, a compressor apron located above said conveyor, a hopper located below the upper end of said conveyor, an inclined apron below said hopper for receiving the material discharged thereinto, means for rotating said hopper and the apron below it in any direction to discharge the material excavated, inclined walls located on opposite sides ofthe lower portion of said conveyor in the rear of said shovel, and means for heating the space between said inclined walls.

17. The combination of a tractor, a framework mounted thereon and carried thereby, a rotary shovel mounted in the forward portion of said frame-work, an inclined conveyor in the rear of said shovel, a turn table located on the rear portion of said tractor,

a hopper located below the upper end of said inclined conveyor for receiving the material excavated, and an inclined apron` below said hopper for conveying the material discharged thereinto to the Adesired point.

18. The combination of a tractor, a turn table mounted thereon, an endless apron supported by said turn table, means for actuating said apron, a hopper located above said apron, a motor carried upon said turn table, an oil tank also carried on said turntable, water circulating pipes leading through said hopper and through said conveyor, means for forcing water through said conveyor and the walls of said hopper, and meansI for supplying oil under pressure to burners located in proximity to said water pipes.

19. In a device of the character stated, the

combination of a rotary shovel, a conveyor apron in the rear thereof, and a plough located intermediately of said rotary shovel and apron, said plough being `adapted, to be reciprocated in a suitable casing, and means for heating said casing.

20. In a device of the character stated, an inclined conveyor apron, upper and lower intermediate rolls therefor, a plurality of Water boxes positioned between said rolls, means for supplying Water to said water boxes, the latter being in communication with each other, burners for each of said oil boxes, and means for supplying a hydrocarbon to each of said burners.

2l. In a device of ther character stated, an endless delivery apron, upper, lower and intermediate rolls therefor, a hopper located above said delivery apron and discharging thereupon, Water boxes positioned between the rolls of said delivery apron, connect-ions from said water boxes to heating coils for heating said hopper, means for circulating water through said water boxes, burners for heating said Water boxes, and 'means for forcing oil into saidburners.

22. A rotary shovel composed of inner and outer walls forming transverse troughs and blades, the outer ends of said blades being reinforced by transverse pointed members, a lining of asbestos for the space between said walls, water holding devices in said space, and means for heating said Water holding devices.

PATRICK J. MCDONALD. Witnesses:

IRA K. SCHELL, RALPH S. WILSON.

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