US1784156A - Apparatus for mining and loading coal - Google Patents

Description

5 Sheets-Sheet l A wr@ 9, 1930. E. c. MORGAN APPARATS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 NN mwa N Dec. 9, 1930. E. c. MORGAN APPARATUS FOR/*MINING AND LOADING-COAL Filed Nov. 19, 1917 5 Sheets-Sheet 2 Dec. 9, 1930. Y E, C, MQRGAN 1,784,156

APPARATUS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 5 Sheets-Sheet 3 N 'uuu @d d "Wh un C, or an @M55 @wlw S31/m #M j Dec. 9, 1930.

E. C. MORGAN APPARATUS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 5 Sheets-Sheet 4 Ummm Edina/zd folyan @www Dec. 9, 1930. IE. c. MORGAN 1,784,156

APPARATUS FOR MINING AND LOADING COAL Filed Nov. 19, 1917 5 Sheets-Sheet 5 y LAT/ff /fcomm f 7 /r CK:

adm y M/ 0c ff* M 1am/MA f\ COAL /V hvuhw', 1 "vl l$/ 1" MAQ y f M/ g w wm S11/vm j" .jj Ed nd 0.Mor aM M$WV` /7 @WMA/M 4MM j Patented Dec. 9, 1930 STATES PATENT ori-tice i MUNI) A'(2. MORGAN, 0F NEW 1YORK, N. Y.; OLIV EUGENIE MORGAN EXECUTRIX 0F EDMUNDfC. MORGAN,

. mmrns Fon marmo, AND mAmNGeoAL Application leg Nveniber 19, 1917. SerialfNo; 202,825.

'The object of this invention is to provide aLmore efiicientfmethod of mining andgload- 'ing' coal Land other material and'V improved mechanism for carrying on such process.

'The :invention is exemplified'in the combination and arrangement of parts shown in 'the'accompanying drawings and ldescribed in 'the followinfr the Vprocess vdcescribed thereinfand the invenlo -tion-gislmore particularly pointed out inthe Vzo appended claims.

1n `thedrawings- -Fig 1 is a top plan vview *of one Jorln of machineY included inthe 'present invention.

Fig. 2 is `a side elevation showing the machine'in position in aI coal mine.

-Fig. 3 is a vertical sectional View on line 3-31of Fig. 1.

F fig.`4- is a verticalsectionalview'on lline of Fig. 1.

Fig. 5vis a vertical sectional view on' line 5 -5 of Fig. 2.

VFigti 'is a vertical sectional View on line 6`-6`of Fig. 2. Y l

Fig. 7 isa vertical sectional view kon line "7 7 of Fig. 1.

Fig. 8 is a vertical sectional view on line 8 8 of Fig. 2. v

l Fig. 9 is a horizontal sectional view on line 9-`9 of Fig. 7. e

Fig. 10 is an elevation of asupplementary cutter which v,may beused in connection with the machine shown in Figs. land 2.

Fig.V 11 is a top` plan view of -the*cutter Vshown` infFig. 10 with the cutting chain omitted. Y j

'Figs.\12,- 13, 14a-nd' y15 are diagrammatic views Irepresn-snting difi'erent steps-'inthe process of mining coal in which the machine shown in 'theo'ther views is employed.

The machine,-as shown in Figs. 1 and 2,

inclrides'a central section A,l afforwafrdV sec` tion`Bl,l anda Vreal section C, the sections 1B and" "CJheingpivotallly connected with the central section to "swing laterally about uprightaxes. K

Asshownlmost dearly in Fig. '2 ofthe drawings, theinnmeral'l represents the main frame vrof a lmining machine v which carries irpwa-rdiy projecting standards--`l6 `and 17.

specification and 4the steps of -A=1nain'driving motorv 18 is carried on the upper surface of the `tframemernber 15 and 'ist provided with a shaft 19' 'journaled in a bearing 20 supported bythe standard 16. rPhe standards 16 'and 17- at theirnpperends st'ipportfr a conveyer fra1ne`21 in fixed ipositionrr'elative'to ythe base plate l5 and at the forward end of the plate 115, assh'ownmore yclearly in Fig. 4, is a'station'ary upright shaft 22`5Whichfhasits Vlower end secured to the base A15 'and itsnpper end held vby the'orwa-rd portion of the conveyer' frame 21. VThe 'uprightshaftg22 forms a pivotal support for. the main frame 23 of fthe'i'orWard-setion-B offt'hefminin'g machine. The frame/member 23,-as shown inv Fig. 4,3is I'bifurc'ated to fform yan-npfper fplate`24 and a lower-plateV 25 which engage *the 'shaft ,22. Between the plates 24' and' 25- a beveled gearwheelQGis journaled on the shaft'f22and isldri'venbya 'pinion 27 securedlto theforward e'nd of 'the 'shaftfl9- The flower surface #of the gear wheel 26 is provided "with teeth 28 which meshf-with a pinion-29 securedto afshaft 301which is Yjournaled in`v` fthe-1 ra'mei23fand which iearriesl'a pinion' Blion -itsdforward end. Thepinion 31, asshownlinFig. 8,Ineshes with a pinion 32 on '1a -countershaft-BS jonrnaled in the *frame 23, from `which countershaft the mechanism-carried -by the' forward portion B lof thehmachine isvdriv'en. The-'portion vBinc'lindes thec-ntting and breaking apparatus forfdislodg'ing the coaflfromllits Vnative bed and includes the main `frameimember A23 which swings about its i pivotal support-122 and-'which Acarries 'the cutting and `breaking mechanism'together with yal conveyerl. forrreceiving-thematerialfas it is dislodged. The j frame '.niember! 23V .has extending aroundr Lits periphery a chainguide C34 Fin which vthe 'lower cuttin' idhain travels. This chainfis driven, as in Fig.- 4,-by a `.sprocket Wheel y36 keyedu to the hub v0i lthe Kegear 26. The iframe member 23 ailso =carries fguideways STfora c'onveyer 38 which receives the materialas it ris'ldislodged rand carries it rearwardily anddischargesit into the `c'onveyer 21 ofithe lcentral'iseetienof the machine. The

conveyer, asshow-n-in Figs. 4f and 8,is

the upper portion of the conveyer 2l and is free to be moved upwardly if the section B of the machine is swung to one side a` sui'lion 45 into contact with the upwardly ined portion of the conveyor 21.

frame member 23 is provided with up- 46, 47 and 48, each of which carries eaded standard 49 arranged to telescope into the upper end of its upright. The standards 49 support a frame member 50 which carries a cutter chain 51, the frame and chain constituting an upper korf-cutter which is adjustable vertically by movement of the standards 49 into and out of their respective supports. Each standard 49 is pro ided with a sprocket wheel 52 which rests upon the top of its support, and a chain 53 is arranged to drive the sprocket wheels 52 inunison with one another. An idler sprocket k54, Fig. 1, guides one run of the chain 53 to hold the chain out of the way of the material which is being mined. The idler sprocket may be supported from the upright 47. One of the sprockets 52 is provided with a worm wheel 55 rigidly connected therewith by means ofy which the chain 53 is driven.

- The worm wheel 55 is rotated by a worm 56 having a crank 57 connectedtherewith and being supported by a bracket 58 on the upright 46. lt is apparent that rotation of the hand crank 57 will rotate the sprocket wheels in which the standards 49 are threaded and thus move the upper korf-cutter vertically to adjust it to various positions. The cutter chain 51 is driven by a sprocket wheel 59 mounted at one corner of the upper kerfcutter and rigidly secured to an upright shaft 6() journaled in a bearing 61 which is connected with the frame of the upper kerfcutter. rfhe bearing 61, as shown in Figs. 7 and 9, is connected with the cutter frame 50 by a bracket 62 which extends laterally on each side of the bearing. As shown in Fig. V8, the shaft is provided with a telescopic extension 63 and the lower end of the shaft is =rovided with a bevel gear 64 which meshes with a similar gear 65 carried onthe end of the shaft 33. By 'this arrangement the chain 50 may be driven at the various positions of vertical adjustment of the upperkerf-cutter. The forward end of the conveyer frame 21 is provided with a fixed rack segment 66 with which a worm 67 meshes for swinging the cutter section B of the machine laterally about its pivotal support 22. The worm 67 is rigidly connected with a transverse shaft amount to bring the end of the pivoted 68 which carries a worm wheel 69 rigidly secured thereto, as shown in Fig. 3. The worm wheel 69 meshes with a worm 7 O secured to an upright shaft 71 and mechanism is provided, as shown in Figs. 3 and 8, for imparting two different speeds of rotation to said shaft. y The upper end of the shaft 71 carries a pinion 72 meshing with an internal gear 73 loosely mounted on the shaft 60 while a larger pinion 74 meshes with a spur gear 75 also loosely mounted on the shaft 60. The gears 73 and 75 may be selectively connected with the shaft 60 to rotate therewith by means Y of a clutch 76 having an operating handle 77.

it is apparent that different speeds of rotation may be imparted to the shaft 71 by the two sets of gears thus provided and that the cutting section B of the machine will be correspondingly fed laterally about its pivot 22 at speeds depending upon the particular set of gearing which is used.

A breaker is provided to travel in the kerf formed by the u1 per cutter for the purpose of dislodging the coal and breaking it down onto the conveyer 38. This breaker, as shown in Figs. 1 and 7, comprises a cylinder 8O in which a piston 81 is mounted for reciprocation. The piston 81 is normally held retracted within the cylinder by a spring 82 and when so retracted the piston and cylinder will enter the kerfy formed by the cutter-chain 51. The cylinder is provided with a pair of loops 83 which loosely engage a rod 84 connected with the frame member 50 of the upper kerf-cutter and provided with a coiled spring which normally forces the cylinder into a position close to the rear of the cutter-chain. vWhen the piston is forced outwardly by mechanism to be described, the breaker will be held stationary by contact with the coal at each side of the kerf while the cutter continues to feed forwardly. The spring 133 upon the rod 84 will be compressed during this stage of the operation until the breaker has eX- panded a suficient amount to dislodge the coal with which it is in Contact after which the spring will return the breaker to its normal position. The piston 81 is operated by liquid forced through the pipe 85 into the cylinder 80 by means of a pump 86. The pump 86 is provided with a piston 87 connected by a strap 88 with an eccentric 89 keyed to the shaft 60. rlhe pump is supported by a yoke 90, which passes around the bearing 61 extending through openings in the bracket 62 provided for that purpose. rhis arrangement permits of the pivotal movement of the breaker relative to the kerfcutter during the time that the breaker is held stationary while the cutter continues to move forwardly. Liquid is supplied to the pump 86 from a tank 91 provided with the usual valve 92 for controlling the flow of liquid. A check valve 93 is interposed between the pump 86 and the pipe 85 to prell (l l upwardly toward the kerf -ornie'd'by'the up-v vent return flow of liquid to the pump, and a three-Way valve 94 having an operating handle 95 is placed within the pipe 85 where it unites with branches 96 and 97 leading to the tank 91 and the pump 86 respectively. By means of the valve 94 the cylinder 80 may be connected either with the tank 91 to permit collapse ofthe breaker, or with the pump 86 to cause expansion of the breaker for dislodging coal. I

AIn Figs. 10 and 11 there is shown a supplementary kerf-cutter which may be used to form an'upright cut along the arcuate surface described b the outer end of the swinging' section B. -his kerf-cutter comprises` a guide frame 98 in which achain 99 slides,

the frame being curved to correspond to the curvature of the arc through which the cutv ting mechanism swings. The frame 98 is supported by a pair of bars 99 slidably mounted in a frame 100 carried by a bracket 101 adj ustably secured to the upright post 46 by means of a split collar 102 and clamping bolts 103. The bracket 101 carries a motorl 104 which drives a shaft 105 through gearsV 106 and 107. The shaft 105 ispiovided withv a sprocket wheel 108 Yby means of which the chain 99 is driven. The supporting bars 99 may be adjusted within the frame 100 by` means of ascrew 110 to vregulate the tension in the cutter chain 99. *When this mechanism is used in connection with the cutter section B the chain 99 will cut an arcuate kerf between the mine wall and the material being severed which extends -rom la point adjacent the kerf formed bythe lowerpcutter 35 per cutter 51. The distance betweenthe arcuate'edge of the upper kerfand the-upper horizontally eXtending-kerf will vary according vto the height to which the upper kerf-Vy cutter is adjusted,'andthe strip of coal fre# maining between the two kerfs .will` be broken when thev severed section is dislodged by the hydraulic breaker 80. The coal, of course, is

broken do vn by this hydraulic breaker while it is in position above the conveyer 38 and before it is reached by the upright 46, so that it does not interferewith the motor and other mechanism supported by this upright.

'lVhen the coalis discharged from the rear end 450i the forward conveyer, it enters the hopper at the forward end of the conveyer 21 and is moved,` Vupwardly by this conveyer Luntil it is discharged into the rear section C of' the mining and loading machine.' Y The conveyer 2lis driven by a motor 109 which is geared to a shaft 110 having the usual sprockct wheels for operating the conveyor chain.v

Apair of screw jacks 111 are carried vby theV upper portion of the conveyer frame 21 for engaging the root ofthe minefto hold the main or intermediatesection A of the machine stationary whilea cutis beingY taken.

'i Theiuc'lination of therframe 15 may be varied.

gagement with the floor of the mine and thus tip the frame 15 to adjust the position of the swinging cutter. The vscrew jack '115 is mounted upon the casing of the motor 18, as shown in Fig. 6, which casing also carries a bracket-11G on which` is mounted a motor 117 driving a winding drum 118 by means of which the machine may be moved forwardly within the mine chamber after each cut is made by the swinging section B.

In a machine of this character it is sometimes-desirable to remove the motor armature for repairs or other purposes, and because of the position of the motor relative y to the other `parts it would be difficult to accomplish such removal inthe usual way. f F or this reason themotor casing is split upon Ya lplane passing through the center ofthe shaft 19 andthe two sections are held togetherbybolts 120. The shaft l19 is pro-v 1 as resting directly on the mine Hoor but truck wheels 123 are shown in broken lines in these views to indicate the position that such wheels occupy while'themachine is being transported f.

into and out of operating position. A track 124 is also indicated in broken lines in these views.V This track, of course,is not shown in l its true position relative to the mine loorbut only indicates the relative position of the minf ing'machine and trackduring transportation.

Therusualvopeiation is to bring the machine into position within the chamber' while it is supported on its truck wheels 123 resting upon Athe mine track. After the machine is so positioned, the truck wheels are .removed andthe frame-15 is permitted to rest upon the floor ofthe minechamber. `During operation theA frame isr slid forwardly over the floor yof the'chamber by the rope winding mechanism'llS 4and the track islaid in the rear of the macliine'for accommodating the '.fi

cars tortransportin'g the mined material.

The rear sectionC comprises a hopper 125 which is pivot-ally. supportedat 126 on the frame 15 and which is `provided with an aline ing pivot 127 at the upper portion of the hopperV carried'by a `bracket -128 .connected with the conveyer frame. 21. A'iiexible convveyer V129 oi'f'usual/ construction 'is arranged 'to travel. ginfthe bottoml of; the hopper'f125.

and 'is-driven `by a'motor 130` geared vto a' zir' cross shaft 131 carrying sprockets 132 for driving the conveyer 129, as shown in Fig. 5.

The diagrammatic views in Figs. 12 to 15 inclusive, illustrate the method of mining coal by using the machine described under diihcult operating conditions, such as wher a layer of slate is interposed between two layers of coal. Under' these conditions the lower vein of coal may be first mined by operating the cutter section B with the upper kerf-cutter in a lowered position, as shown in Fig. 13. After the lower coal has been thus removed, the layer of slate may next be taken out by operating the cutter section with its upper lierf-cutter raised to a position above t-he upper surface of the slate. During this cut the lower lrerf-cutter will move in unison with the upper cutter but will not be required to form a kerf. The slate as it is dislodged may be loaded into a car and hauled from the mine, or it be discharged into the gob at the side of the mine chamber, as indicated in broken lines in y Fig. 12. Vhere this is done, it will, of course,

be necessary to remove a sulicient number of the mine props to permit the discharge section C of the machine to be swung to one side. These props may bereplaced after the discharge section is returned to position. In

this connection it may be noted that the machine is quite narrow in comparison with the width or" the chamber which it opens and the props therefore may be obviously placed at the side of the machine up to within a short distance from the mine face. After the slate has been removed, in the manner indicated in Fig. 1l, a third cut may be taken, as shown in Fig. 15, with the upper kerf-cutter raised to a position adjacent the roof of the mine, thus removing the remaining coal above the stratum of slate. v

It should be particularly noted that the upper cutter frame. 50, as shown in Fig. 1, is provided with a large opening so that material may be dislodged from the space above the cutting section B directly through the opening in the cutter frame onto the horizontal portion of the conveyer 37. For instance, after a section of coal has been mined and loaded in a manner diagrammatically illustrated in Fig. 13, the intermediate layer of slate may in some instances be dislodged manually and permitted to drop through the opening in the cutter frame 50 directly onto the conveyer 37. For this purpose, if desired, the cutter section B may be swung around in accordance with the progress made in the dislodgement of the layer of slate. rl`he loading of the slate will of course occur separately from the loading of the coal. lVhen the foreign materialis mined and loaded,it is preferably directed to the gob, as illustrated in Fig. 12 by the dotted lines. It may also occur that in some instances the upper vein of coal, as illustrated in Fig. 15,v could be dislodged and permitted to fall through the opening in the cutter frame 50 onto the conveyer 37. If the vein of coal at the roof is quite thin and may be easily dislodged from the stratum of rock above, it may be more practicable to dislodge the coal manually than to take the time to cut it. Although it is preferable to dislodge an upper layer of material through the opening in the cutter frame 50 onto the conveyer 37, it may be dislodged directly onto the floor of the mine chamber at the arcuate mine wall while the cutter section B is in initial position. Then the dislodged material may be shoveled onto the conveyer 87,- or if desired, the under-cutter may be fed through the pile of dislodged material so that thel conveyer 37 may be moved under the material and take the latter into thehopperat the lower end of the conveyer 21, the latter taking it in turn into the storage hopper 125.

It should also be noted that both the cutter section B and the rear conveyer section C have a. swinging movement on upright axes of 180 degrees or more. The U-shaped frame 128 is so associated with the T-shaped eXtension from the hopper 125 to the shaft 127 that the rear conveyer section C may be swung to positions in alinement with the intermediate conveyer. or at substantially right angles thereto at'either side of the main frame without interfering in the least with the free passage of material from the conveyer 21 through the opening in the U-shaped frame 128 into the hopper 125.

Attention isalso called to the fact that it is preferable to employ separate electric motors 109 and 130 for operating the conveyers 21 and 129 respectively. The conveyer 129 may then be stopped at any time desired while the conveyer 21 may be continued in operation to gradually till the hopper 125. A separate electric motor is also preferable for the rope winding mechanism 118 shown in Figs. 2 and 6 so that the machine may be pulled forwardly or rearwardly independently of the Voperation of any of the other motors. The cutter section B is preferably operated by the separate electric motor 18. This electric motor 18 is preferably series wound so that the power exerted thereby will be in accordance with the work to be done, the greater the resistance to feed on account of the condition of the material, the greater the current that will be taken by the motor and therefore the greater the power thereof, as is well understood. inasmuch as the conveyer 37 is always operated when the cutters operate, and the material is broken down by the breaker 80, no separate electric motor for the conveyer 37 is provided but power is transmitted thereto from the motor 18 by means of the mechanism shown'in Fig. 8. However, when desired, the conveyer 37 may be thrown out of operation by releasing the clutch 43 shown in Fig. 8. The clutch 76 is arranged,..

as shown in Figs. 3 and 8 so thatit may occupy a mid-position and therefore when .desired, feeding movement may bev interrupted while the conveyer 37 is operating and ma.- terial is being dislodged above the cutter sec- .tion B through the opening in the cutter frame onto said conveyer 37. c

On account of the arrangement of the mechanism for driving the kerf-cutters, the motorrlS may be placed under the conveyer 21 so that the apparatus will bel then compact. While the lower or-fioor cutter chain extends rearwardly under thehopper at the lower end of the conveyer 21, the upperkerffcutter occupies a position at its rear end in advance of the conveyer 21. Therefore the range of vertical adjustment of the upper kerf-cutter 51 may be increased without interfering with the movement of the pivoted section 45 of the conveyer 37 when the latter is to be swung to positions where the section 45 tends to abut against the inclined sides of the conv'eyer 21.

It should also be. noted that the sprocket l chain 53 which meshes with the sprockets of the nuts at the upper ends of the posts 46, 47 and 48 is directe by the idler sprocket 54, as shown in lFig. l, to a position vwhere there will beminimum'interference with the free passage of vdislodged material through the cutter frame 50.v The screw-threaded supports 49 whichcarryithe upper kerf-cutter and Vwhich are threaded through the rotary i? nuts'at the upper ends of the spaced-apart upright standards 46, 47 andv 48, are simultaneously lifted or lowered so as to secure a rectilinear upf and down movement of the u per ykerf-cutter together with the breaker 8d), as shown in Fig. 1f' f Obviously those skilled in the art may make various changes in the details and arran ements of arts herein shown and descri ed without eparting from the spirit and scope of my invention as defined by the claims hereto appended, and I wish, therefore, not to be restricted to the precise construction disclosed.' V

I claim: y 1. A mining machine lcomprising a frame,

'y a cutter carried by said frame, a jack comprising a U-shaped bar pivotally connected with said frame, and a lever for tilting said bar about its pivot to adjust the height of f'fa portion of said frame relative to the surfaceV tiltingsaid bar about its pivotal connection with said frame, and a screw for operating saidlever to tilt said ,frame4 vertically to adjust thepositiouof said cutter.

3. In a mining machine, a frame, a horip zontallyextending cutter pivotally carried by said frame for swinging movement laterally yabout an upright axis, a second horizontally extending cutter connected with said first cutter and spaced upwardly therefrom,

and extensible uprights for supporting said second cutter. I y

4. In a mining machine, a frame, Va cutter head pivotally mounted` on said frame to swing laterallyA about an upright axis, a pair of vertically spaced horizontally extending kerf-cutters carried by said cutter head, an upright kerf-cutter carried by said cutter head substantially in*v alinement with the outer portions of said horizontally extending cutters, a support for said upright cutter in the rear'thereof, and means for dislodging the material partially severed by said cut- .ters to provide clearance for said support as said cutter head is swung about its vertical axis.

5. Ina mining machine, a frame, a cutter head pivotally mounted on said frame to Vswing laterally about an upright' axis, a pair of horizontally extending vertically spaced kerf-cutters carried by said cutter head., and

triangularly arranged uprights for holding of uprights for holding said kerf-'cutters in spaced relation to one another, said uprights being positioned at three of the corners of said rectangular -shaped cutters leaving the space between the forward and the outward edges of said cutters open to permit the material being severed to pass between said cutters as said cutter head is swung about' its pivot.

7. In a mining machine, a cutter head comprising a pair of vertically spaced hori* zontally extending substantially rectangularshaped rkerf-cutters, uprights extending between saidv cutters and located at the inner and `rear corners of the rectangle formed by said cutters leaving the space between the forward and outer edges of said cutters free to permit the material being severed to enter between said cutters, a conveyer carried by said cutter head and movable into the kerf formed by lthe lower one of said cutters, and means `for dislodging said material to cause it to be deposited upon said conveyor and transported to a loading position thus providing clearance for the outer upright eX tendingbetwen said-cutters.

S. In a mining machine, a critter head comprising upper and lower kerf-cutters,` standards for holding said cutters in spaced relation relative to one another, said standards being arranged inwardly and in the rear of the operating edges of said cutters, and an upright kerf-cutter secured to one of said standards for forming a kerf along the vertical side of the material above and below which the first-mentioned kerf-cutters operate.

9. In a mining machine, a frame, a cutter head pivotally mounted on said frame to swing about an upright axis, a pair of horizontally extending vertically spaced kerfcutters carried by said head, a standard for holding said cutters in spaced relation, and an upright cutter secured to said standard comprising a cutter chain and a guide for said chain curved to conform to the curvature of the arc described by the outermost portions of said spaced cutters.

10. In a. mining machine, the combination with a cutter-frame having the shape of a segment of an annulus, of an endless chain cutter mounted to travel around the perimeter of the annular cutter-frame, and means for pivotally supporting said cutter-frame for arcuate swinging movement on an upright axis.

11. In a mining machine, an uprightcutter means for swinging said cutter about an upright pivot to feed said cutter into the material to be mined, said cutter being curved to conform to the curvature of the arc through which it swings, a support for said cutter positioned in the rear thereof, and means for dislodging said material after it has been passed by said cutter but before it has been reached by said support, thus providing clearance for the passage of said support during the swinging movement of said cutter.

12. In a mining machine, a pivotally mounted cutter head arranged to swing laterally about an upright axis, an upright standard carried by said cutter head, an upright critter mounted on said standard and curved to conform to the curvature of the arc through which it swings, a motor for driving said cutter connected with'said standard in the rear of said cutter` and means for dislodging material adjacent. said cutter but in advance of said motor to provide clearance for the passage of said motor during the feeding movement of said cutter head.

13. In a mining machine, al pivotally monnted cutter head arranged to swing laterally about an upright axis, an upright standard carried by said cutter head, a bracket adjustably mounted on said standard, a chain guide carried by said bracket, a cutter chain slidably mounted on said guide, a motor carried by said 1oracket for driving said chain, and means for adjusting said guide relative to said bracket for regulating the tension of said cutter chain.

11i. In a mining machine, a pivotally mounted cutter head arranged to swing laterally about an upright axis, a pair of vertically spaced horizontally extending kerf-cutters on said cutter head, an upright standard connecting said ycutters adjacent the outer and rear edges thereof, a bracket carried by said standard, a chain guide carried bv said bracket,l a cutter-chain slidably mounted on said guide, a motor carried by said bracket for driving said cutter chain, and means for dislodging material adjacent said cutter-chain and guide and between said spaced cutters to provide clearance for said standard and motor` when said cutter head is swung about its pivot during a mining operation.

15. In a mining machine, a pair of vertically spaced horizontally extending kerf-cutters, a plurality of adjustable standards for holding said cutters in spaced relation relative to one another, sprocket wheels mounted on each of said standards for adjusting the length thereof, and an endless chain for driving said sprocket wheels in unison with one another.

1G. In a mining machine, a pair of vertically spaced horizontally eXtending kerf-cutters, a plurality of standards for holding said cutters in spaced relation with one another, said standards including threaded sections and sprocket wheels for co-operating with said sections to adjust the length of said standards, an eXtensible shaft for operating one of said kerf-cutters, and an endless chain for driving said sprocket wheels in unison with one another to adjust the position of said kerf-cutters relative to one another.

17 In a mining and loading machine, the combination with ay main frame, of a main conveyer mounted on'said frame, al swinging frame mounted on said main frame, kerfcutting mechanism, breaking mechanism, operating mechanism, and conveyer mechanism mounted on said swinging frame to move therewith, a. motor mounted on said main frame below said main conveyer, and gearing for transmitting power from said motor to the said kerf-cutting mechanism and said breaking mechanism, said operating mechanism and the conveyer mechanism on said swinging frame while the latter is swinging.

18. In a mining and loading machine, the combination with a main frame, of a supplemental frame mounted on said main frame to swing on an upright axis relatively thereto, a kerf-cutter mounted on said supple.- mental frame in position to cut a kerf at the base of a mine wall along the floor of a mine chamber, means for driving said kerfcutter, means for swinging said supplemental frame to effect feeding movement of said kerf-cutter, dislodging mechanism mounted on said supplemental frame for vertical adjustment above said floor kerf-cutter andv for bodily swinging movement -with said supplemental frame, and conveyor mechanism mounted on said supplemental frame to swing bodily therewith in position for au-tomatically receiving the dislodged material and conveying it toward loading position.

19. In a mining and loading machine, the combination with a main frame, of a vertical shaft mounted on said main frame, a. swinging frame mounted on said vertical shaft, two kerf-cuttersl carried byV said swinging frame, a gear rotatably mounted on said vertical shaft, means4 connecting said gear to one of said kerf-cutters, and separate means connecting said gear to the other kerf-cutter. 20. In a mining machine, Ithe combination with a main frame, of ka supplemental frame connected thereto, spaced-apart kerf-cutters mounted on said supplemental frame, power transmission .gearing for driving said kerfcutters, power transmission gearingY for swinging said supplemental `frame on an uprifrht axis relatively to said main frame to e ect arcuate feeding movement of said kerfcutters, and means mounted on said main frame for tra-nsmittingpower to bothof said power transmission gearings to effect the operation. of `said kerf-cutters.

21. In a mining machine, the combination with a main. fra1n.e,of. a supplemental `frame pivotally connected to-said main vframe. to swing relatively thereto -onran uprightaxis, kerf-cutters mounted on said'supplemental frame to occupy verticallyspaced-apart positions to cut kerfs extendin@r in general horizontal directions at different elevations, driving gearing for said kerf-cutters, means for swinging said supplemental frame on said upright axis to secure arcuate feeding of said kerf-cutters, means mounted. on said main frame for transmitting power to said drive gearing and said swingingr meansto effect the operation of said kerf-cutters, and a source of power on said main frame.

22. In a. mining machine, the combination with a main frame, of asupplemental frame connected to said main frame. to swingon an upright axisV relatively to said main frame, a lower horizontal kerf-cutter comprising a cutter chain extending around said upright axis, an upper kerf-cutter mounted on said supplemental frame with its rearend in front of said upright axis, and meansfor. operating said lower and upper kerf-cutters including swinging movement of saidvsup-Y plemental frame Vto effect feed of saidV cutters.

23. In a mining machine, the combination with' a main frame, of an upright journal bearing on lthe forward end of said main frame, a supplemental frame journaled on saidl bearingfor swinging movement relatively to said 11minY frame on-the .upright axis of said journal bearing, a gear rotatably' mounted on said journal' bearing, a motor on said mainframe connected to said gear to drive the same, an under cutter mountedon said supplemental frame and comprising an endless cutter chain extending around said upright axis, af driving sprocket wheel con-' nec-ted to rot-ate with said gear on said journal `bearing, in position to drive said under Y cutter, an upper kerf-cutter mounted on said 24. In a miningmachine, the combination w1th supporting framework compri-sing lspaced-apart upright supports, a kerf-cutter mounted on said spaced-apart upright supports and comprising a cutter-frame rigidly connected to said supports fory adju-stment in elevation, andmeans connected to each of said supports forsimultaneous op'- eration to move said kerf-cutter up and down rectilinearly to adjust the elevation thereof while maintaining the rigid connectionbetween saidupright supports and said cutterframe. Y

25. In a miningmachine, the combination with `supporting framework Vcomprising spaced-apart screw-threaded supports, a horizontal kerf-cutter mounted on top of said supports, means rotatably mounted .on said screw-threaded supportsto effect the adjustment in elevation of'said horizontal kerf-cutter, and mechanism for simultaneously operating said adjusting; means.

26.4 Ina mining machine, the combination with supporting framework. comprising spaced-apart upright screw-threaded suports, a Imton each support, ahorizontal lprf-cutter mounted on, said supports, and means comprising au endless sprocket chain for. rotating the nuts on said screw-threaded supports to Vadj ust the elevation of said horizontal kerf-cutter.

27. In a mininof machine, the combination with sup orting framework, of a horizontally extentiing kerf-cutter pivotally connected to said framework for swinging .movement about an upright axis,A a second horizontally extending kerf-cutter spaced upwardly from said first-namedr kerf-cutter, extensible uprights for supporting said second-named kerf-cutter at various elevations, and means for operating said-kerf-cutters including arcuate feeding movement thereof on said upright axis. i

28. In a mining machine, the combination with a main frame, of a supplemental frame pivotally4 connectedthereto, a motor mounted on the mainframe, aworm gear Vfixed, to Said .mainframe gearing;Connected-between,

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said motor and said worm gear for moving said supplemental frame in an arc ou s., upright axis, a horizontal korf-cutter comprising an endless cutter chain and a cutter frame mounted on top of said supplemental fra-me, and power transmission gearing between said motor and said cutter chain for driving the latter.

29. In a mining machine, the combination with a main frame, of a supplemental frame pivotally connected to said main frame to swing relatively thereto on an upright axis, a gear on said main frame rotatable on said upright axis, a motor on said main frame connected to said gear to drive the same, a horizontal lrerf-cutter comprising a cutter chain and a cut-ter frame mounted on top of said supplemental frame, and a train of drive gearing between said first-named gear and said cutter chain and comprising a. forwardly extending shaft, a transverse shaft and a vert-ical shaft.

30. In a mining machine, the combination with a main frame, of a worm gear iixed thereto in stationary position, a supplemental frame pivotally connected to said main frame to move in an arc concentric to said worm gear, a worm on said supplemental frame in position with said worm gear, a horizontal shaft for carrying said worm, a horizontal kerf-cutter mounted on said suplemental frame, means forv driving said {erf-cutter, feed gearing connected to said worm to drive the latter slowly to effect slow movement of said le-rf-cutter in feeding direction, and mechanism for eifecting reversal of said feed gearing and quicker movement of said kerf-cutter to restore the latter to initial position.

3l. A mining machine comprising a horizontal korf-cutter having a cutter frame with a large opening therein for the passage of material dislodged above said kerf-cut-ter, a plurality of spaced-apart supports for said cutter frame to hold the same at adjusted elevation in substantially horizontal position, adjust-ing devices on each of said supports, means for simultaneously operating` said adjusting devices to secure vertical rectilinear movement of said cutter frame for varying the elevation of said kerf-cutter, and means for supporting said simultaneously operating means to extend alongpositions leaving the opening through said cutter frame free and unobstructed.

82. In a. mining machine, the combination with a main frame, of a. supplemental frame pivotally connected to said main frame for swinging movement relatively thereto on an upright axis, lerf-cutting mechanism mounted on said supplement-al frame in elevated position, said korf-cutting mechanism comprising an endless cutter chain mounted on the periphery of a cutter frame having a free and unobstructed opening extending traneversely therethrough for the passage of ina-- terial dislodged above said korf-cutting mechanism, means for operating said herfcutting mechanism including swinging of said supplemental frame to secure arcuate feeding movement of said korf-cutting mechanism, and loading apparatus mounted on said main and supplemental frames and comprising a conveyer extending to a receiving position below the said opening in said cutter frame.

33. In mining apparatus, the combination with a. wheel supported rigid base frame adapted to runupon the rails of a mine track for transporting t-he mining apparatus, said base frame being adapted to be lowered to permit the same to rest on and be supported by a mine floor, of a supplemental frame pivotally connected to said base frame to swing laterally relatively thereto, a plurality of upright supports mounted directly on said supplemental frame and extending upwardly therefrom at the angles of a relatively widely extended horizontal polygon, a rigid cutter frame, means carried by and vertically adjustable on said upright supports for carrying said cutter frame in a substantially horizontal plane, an endless cutter chain mounted on said cutter frame, a motor carried by said base frame, and driving connections whereby the power of said motor caused to drive the said cutter chain and to move the supplemental frame laterally to feed said cutter chain.

34. In a. mining apparatus, the combination with a wheel supported base frame adapted for transporting the mining apparatus, said base frame being adapted to be lowered to rest on and be supported by the floor of a mine chamber, hert-cutting apparatus extending horizontally forward from said base frame in iixed relation to said base frame, and means comprising a bell crank lever for engaging the floor of the mine chamber at the rear end of said base frame to tilt the latter and vary the inclination of said hert-cutting apparatus.

35. In a mining machine7 the combination with a supporting frame, of three upright threaded supports mounted on said supporting frame at the angles of a horizontal triangle, cutter mechanism comprising a cutter frame mounted on said supports, nuts on the said supports, and means for simultaneously turning said nuts to secure rectilinear vertical adjustment of said cutter apparatus transversely thereof.

36. In a coal cutting machine, the combination with a movable supporting frame, of three spaced-apart vertical threaded supports on said supporting frame, coal cutting mechanism mounted on top of said supports with the periphery of said cutting mechanism in plan surrounding said supports, means on said supports for adjusting the elevation of said coal cutting mechanism, and-means for operating said coal cutting mechanism at its adjusted elevation. v

37. In a coal cutting machine, the combination with a movable supporting frame, of three spaced-apart vertical standards extending upwardly from said supporting frame, three screw-threaded rods respectively extending into said standards, nuts mounted on said standards and in threaded engagement with said screw-threaded rods, sprockets on said nuts, a -sprocketchain engaging each of said sprockets, a horizontal kart-cutter mounted on top of said screw-threaded rods, means for driving said sprocket chain to rotate said nuts to secure simultaneous up or down movement of said screw-threaded rods and thereby adjust said ker-cutter rectilinearly and vertically into various horizontal planes, and means for operating said kerf- Vcutter at its adj usted elevations.

V zontally Vin planes near the top of the said movable base, an endless cutter` chain on said cutter frame, a motor on the base frame below the planes of the cutter frame, gearing for transmitting the power of the motor to drive the cutter chain, a winding drum on the base frame, a cable connected at one end to said drum to be wound thereon and adapted to be connected at the other end to a point external to the machine, an additional motor connected to said drum to rotate the same and move the machine as a whole, means for adjusting the elevation of said cutter frame and cutter chain relatively to said supplemental and base frames, and means forswinging said supplemental frame on said vertical axis to secure arcuate feeding movement of said cutter chain.

39. In a wheelfsupported coal mining machine `adapted to be transported over mine tracks to cut a horizontal vkerf while resting on the floor of a mine chamber beyond the forward end of said track, the combination with a base frame, of track wheels for supporting said base frame on the mine track during transportation of the whole machine, saidV wheels being detachable to permit said base frame to rest on the floor of the mine chamber beyond the forward end of said track, rope Winding mechanism mounted on said base frame and comprising a rope adapted to be connected to an anchorage for sliding the base frame over the floor of the mine chamber to new position-s, anchoring lmechanism for holdingr the base frame in adjusted position, a supplemental frame pivotally connected to said base frame for lateral movement relatively thereto on an upright axis, dislodging mechanism mounted on said supplemental Vflame,.and means operating said dislodging mechanism including rlateral arcuate movement of said su plementa'l -frame.

40. In 'a' system o coal mining apparatus comprising aground supportedgtrack anda portablev mechanism adapted toy betransported over said trackand beyond the .for-l ward end thereof for sliding support on the mine floor, and also ada ted to cut a horizontal kerf in a coal face W ile supported on the mine fioorinfadvance of said track, the combination with a rigid baseframe, of wheels adapted to beconnected tosaid base frame for vtransporting the machine over said mine track, a, supplemental-frame pivotally; connected to said baselframe for swinging movement 'relatively thereto onlan upright axis,

mental frame extending horizontally vto points outside of and remote Vfrom Vthe verti' caly bounding lines of said 4base frame and. its rear end extending backover the base Vframe, supporting connections between the rear'end of said supplemental frame and the base frame comprising a horizontallycxtendedrotaryfbase structure pivotallydisposed 'at' the forward vend of said i base frame, power mechanism for driving the*` kerf-cutting mechanism, power mechanism constructed and arranged to move the supplemental frame laterally from points 4on one side of the machine to points at the other side thereof, and a motor on the vbase frame for actuating said power mechanisms. f. v

'41. Inramining machine, the combination with a main frame, of a supplemental frame pivotally mounted on said main-frame for swinging movements relativel .thereto on an uprightaxis, ahorizontal ker -cutter mounted on said supplemental frame for adjustment in elevation, vmeans for holding the kerf-cutter at adjustedelevation, meansqfor operating said kerf-cutterincluding swinging movement of said supplemental frame to secure feeding movement of said ker-cutter, and breaking mechanism carried by said supplemental framefor operation inthe kerf cut by said kerf-cutter ,toy break down the slabs of materialbelowy-the plane of lsaid kerfcutter. v. 1 f

42. In a mining machine, the-combination with a mainframe, oflpropelling mechanism therefor, a supplemental frame pivotally connected tosaidvmain frameffor. lateral swingingmovement in advance thereof on an upright axis, means 'comprising a worm gear ilnmovably secured to said main `framefor swinging said; supplemental frame relatively propelling mechanism to effect rectilinear e one end of said main frame and while locked by said worm gear againstfturning relatively to said main frame to effect the cutting of a kerf to one side of the path of travel of said main frame and substantially parallel to such path of travel andin a plane substantially perpendicular to such upright axis.

43. In a mining machine, the combination with a main frame, of a supplemental frame pivotally connected thereto, horizontal kerfcutting mechanism mounted on said supplemental frame, propelling mechanism for moving said main fra-me rectilinearly to effect' rectilinear feeding movement of said kerf-cutting mechanism, means for swinging said supplemental frame to effect arcuate movement of said supplemental frame, and breaking mechanism mounted on said supplemental frame within the boundary of said kerf-cutting mechanism to act in the kerf cut by the latter to break down material adjacent said kerf.

44. In a mining machine, the combination with a main frame, of wheels adapted to support said frame on a. mine track, a supplemental frame pivotally connected to said main frame to swing on an upright axis relatively thereto, kerf-cutting mechanism mounted on said supplemental frame, means for driving said kerf-cutting mechanism, means comprising a worm gear immovably secured to said main frame for swinging said kerf-cutting mechanism to secure n lateral feeding movement thereof, and propelling mechanism for said main frame to move the latter along the mine track to effect rectilinear feeding movement of said kerf-cutting mechanism while said supplemental frame is locked by said worm gearing against turning movement relatively to said main frame. Y 45. In a mining machine, the combination with a main frame, of wheels for supporting said main frame on a track, horizontally extending kerf-cutting mechanism mounted to swing as a unit on an upright axis at the forward end of said main frame,`means for driving said kerf-cutting mechanism, a worm gear immovably secured to said main frame for swinging said kerf-cutting mechanism as a unit relatively to said main frame, and propelling mechanism for moving said main frame along a track to secure forward rectilinear movement of said kerf-cutting mechanism when extending laterally from one side of said main frame and locked by said worm gearing against turning movement relatively to said main frame, and for effecting rearward rectilinear feeding movement of said kerf-cutting mechanism when the latter extends laterally from the other side of the forward end of said main frame and while said vcutting mechanism is locked by said worm gearing against turning movement relatiVely to said main frame.

4 6. In a system of coal mining devices comprising a track extending longitudinally toward the coal face, and mining mechanism thereon arranged to cut kerfs which extend across the central longitudinal vertical plane of the track, the combination of a wheeled truck resting on the track, of three vertically elongated guide supports respectively at the angles of a triangle in horizontal plan, a. frame vertically adjustable connected to each of said guide supports independently of the others and forming a base in a relatively high plane, ar kerf-cutter supported on said vertically adjustable frame and extending forward to points in front of the truck and adapted to be moved, while cutting, laterally across the longitudinal vertical planes of the truck, a motordirectly on said truck, and

means connected between said motor and said.

kerf-cutter to drive the latter and move the same laterally across the front end of said truck.

47. In a coal cutting machine, the combination with a rigid base frame, of a supplemental frame pivotally connected to said base frame, three triangularly arranged upright spaced-apart supporting devices fixedly mounted on said supplemental frame, a cut- .r

ter-frame mounted on top of said devices with the space above and below one corner thereof free and imobstructed, means for adjusting the elevation of said cutter frame relative to said supplemental frame, an endless cutterchain mounted on said cutter-frame to encompass the area of connection between said supporting devices and said cutter-frame, means for driving said cutter-chain, and means for swinging said supplemental frame to effect the arcuate feed of said cutter chain to cut material extending along said unobstructed space. f

48. In a coal cutting machine, the combination with a movable base frame, of supporting track wheels therefor, a cutter apparatus movable as a imit with respect to the base frame about a normally Vert-ical axis, and comprising kerf-cutting mechanism extending outwardly beyond the said base frame along normally horizontal lines near the uppermost'plane of the machine, the said cutter mechanism being movable across one end of the machine about the said vertical axis through an arc extending at each side beyond the verticall plane of the corresponding track wheels, means comprising a worm gear concentric with said vertical axis and immovably secured to said base frame for swinging the said cutter apparatus about said vertical axis, said worm gearing being capable of locking the cutter apparat-us to the base frame at any of several angles, means for driving said Ycutter apparatus, and means for moving the machines bodily while the cutter apparatus is in operation and locked ing against turning. Y

49. In a wheel-mounted coal mining ma-V chine adapted to be transported over mine tracks and to cut a horizontal kerf in a coal face, the combination with a base frame, of track wheels for supporting said frame on a mine track, a supplemental frame carried by said base frame and mounted to turn in relation thereto in normally horizontal planes, continuously acting cutter devices carried by said turning supplemental frame and adapted when said frame turns to cut a horizont-al kerf extending transversely across the track on which the machine stands, means comprising a worm gear immovably secured to said base frame for turning said last-named frame, said worm gearing when not driven being capable of locking said supplemental frame against turning, a motor for actuating by said worm gearsaid turning means, means for transporting i the. whole machine to secure rectilinear movement of said turning frame when extending fromone side of said ybase frame and locked against turnin means for driving said cutter devices during such rectilinear feeding movement thereof.

50. In a mining machine, the 'combination withV a main frame, of wheels for supporting theframe on amine track,I a supplemental frame pivotally connected to said main frame to swing relatively ,thereto on an upright axis, kerf-cutting mechanism mounted on said supplemental frame, a-motor mounted on the main frame, power transmission `mechanism between said motor and said kerf-cutting mechanism, means for vertically adjusting the kerf-cutting mechanism in horizontal parallelism and adapted to hold it either where it will form a kerf in relatively low horizontal planes or where it will form a kerf in other horizontal planes relatively higher than those aforesaid, and power-actuated mechanism connected between said motor and said supplemental frame and comprisin worm gearing between the latter and sai main frame, a worm wheel being fixed to the latter and a worm beingon the supplemental frame in mesh with said worm wheel for causing the said kerf-cutting mechanism to be fed laterally across the frontend of said Y main frame while said korf-cutting mechanism is being driven.

' 51. In mining apparatus, the combination with a main frame, of wheels for supporting f said frame on acentrally arranged track, a

tal korf-cutter .chain on said `.cutter .frame dee by said worm gearing, and

ame, means for-.driving said cutter.

of elongated guider supports respectively' spaced-apart 1in angular relation ahead of Y said main frame, afcutter lframe.connected to said guide supports and verticallyadjustable thereon, an endless cutter chainon said cutter frame in vposition forward offvertical lines through the orwardend of said main frame,and means for operating said cutter chain including feed vthereof by swinging said supplementall frame transversely acro the longitudinal planes of said mainframe to cut kerfs extending across the longitudinal .vertical plane of the mine tracks. 53, In mining apparatus, the combination with a horizontal 'supporting frame',` of 'an auxiliary frame Vcomprising a plurality 'of posts extending upward `from said supporting frame, ai h'o'rimntalcutter `ramesup-l ported on said posts at'two adjacent sides. leaving the cutting lengths and the space beneath the forward portion of 'the 'cutter frame, relative to feeding direction, free and unobstructed, an endless chain cutter on the cutter frame, means for operating Ysaid chain cutter including feed thereof, and breaking mechanism following in the kerfcut 'b said cutter to break down fthe material' be ore it is engaged by said auxiliary frame.V

54. In mining apparatus, the combination with a main frame, of a conveyer thereon having a rear upwardly inclinedportion extending from a hop er atlthevforward end of said frame, a supp emental frame pivotally connected to said main frame adjacent said hopper, a conveyer extending from a forward horizontal portion upwardly and rearwardly to deliver material into said hopper, an undercutter surrounding the. horizontal portion of said second-named conveyer, dislodging mechanism above said undercutter, means for swinging said undercut-ter, swinging conveyer and dislodging mechanism as a unit through one hundred eighty degrees or more while the conveyer thereof remains in delivery communication with said hopper, a rear swinging conveyer mounted on, the rearlend of said main frame to swingy through .one hundred eighty degrees or` more while remaining in communication with lthel intermediate conveyer on said main frame, a deep hop r between the rear end ofthe intermediate conveyerand thelower receiving end of said rear oonveyer, and means for pivotally supportingv said rear-.conveycr :and IVsaid p hopper for 'free land'` nostmcted'defito no j

livery of material into 'said hopper whether directed back to a mine car to load coal mined by said dislodging mechanism or directed to agob to unloadforeign material mined by said dislodging mechanism.

55. In mining apparatus, the combination with a main frame, of a conveyer mounted thereon and inclined upwardly towardthe rear, .a hopper at the forward end of said conveyer, a supplemental frame pivotally connected to the forward end of said main frame adjacent. said hopper, an additional conveyer on said supplemental frame for delivering material into said hopper, kerf-cutting and breaking-.mechanism on said supplementalframel for dislodging material onto said additional conveyer, said additional conveyer comprising pivotally connected sections topermit swinging of said supplemental frame through an angle of one hundred eighty degrees or more andretain delivery communication between said additional conveyer and said first-named conveyer, and means for operating saiddislodging mechanism including swinging of said supplemental frame.

56. In a mining and loading machine, the combination with a main frame adapted to slide over the floor of a mine chamber, of wheelsadapted to be connected to said frame for transporting the same along a mine track, a hopper at the forward end of said frame. a. conveyer` extending upwardly toward the rear from said hopper, a motor-under said conveyer on said frame, a separate motor for driving said conveyer, means for anchoring` said main frame to the y floor of the mine chamber, a rear swinging conveyer pivotally connected to the rear end of said main frame and extending rearwardly on an upward incline, a separate motor for driving said rear conveyer, a deep hopper in receiving communication with said first-named conveyer through a range of angular movement of said rear conveyer of one hundred eighty degrees or more, framework for piivotally supporting said hopper todrive a free and unobstructed delivery space from said first-named conveyer throughout the swinging range of movement of said rear conveyer, a supplemental frame pivoted to said main frame at the forward end thereof for swinging movement relatively to said main frame on an upright axis, a chain kerf-cutter mounted on said supplemental frame in position to' cuta horizontal kerf at the base of an upright mine wall, an upper horizontal chain kerf-cutter spaced above said first-named `kerf-cutter, means for adjusting the elevation of said upper kerfcutter, said upper kerf-cutter having an unobstructed opening therethrough for the passage of material from above the plane of thev upper kerf-cutter to the space below such plane, means in said opening in the upper kerf-cutter for breaking down cut material,

av conveyer mounted on the supplemental frame and having a horizontal receiving portion anda-delivery portion extending rearwardly and upwardly to said first-named hopper, means mounted on therear end of said main frame for t-ilting the latter to adjust the position of said kerf-cutting mechanism, worm gearing between said main and supplemental frames for locking the kerf-cutters against rotation, propelling' mechanism on said main frame for eifecti ng rectilinear feeding movement of said kerf-cutters when locked against swinging movement, means connected between said motor on the main frame and said worm gearing for swinging the supplemental frame and the kerf-cutters and the conveyer thereon relatively to said main frame, and means between said kerfcutters and the motor on the main frame for driving said kerf-cutters.

57. In a mining and loading machine, the combination with mechanism for cutting spaced-apart plane kerfs horizontally across a mine wall, of a frame for supporting said kerf-cutting mechanism for arcuate feeding movement, loading apparatus comprising a conveyer having superposed portions traveling in oppositieV directions and extending to a position back of said kerf-cutting mechanism and in position on said supporting means to follow said'kerf-cutting mechanism in its arcuate feeding movement, and an upright arcuate kerf-cutter mounted on said supporting means to operate at or near the inner ends of the kerfs produced by said first-named kerf-cutting mechanism.

58. The combination with a kerf-cutter comprising a frame, of a breaking device, a pipe for mounting said breaking device in thev plane ofsaid frame, and means connecting said pipe to said breaking device to conduct the operating pressure medium thereto.

59. The combination with a kerf-cutter comprising a frame, of a fluid pressure breaking device, and a pipe for mounting said breaking device in the plane of said frame and also servingto conduct the pressure medium to said breaking device.

f '60. The combination with a kerf-cutter adapted tocut an upright kerf ina mine vein spaced back from the working face, of an expansible .dislodging device comprising a cylinder and a plunger, mounted on said kerfcutter to move bodily therewith into the kerf cut thereby but operable independently of the feed of said kerf-cutter, a pipe mounted on said kerf-cutter and connected to said cylinder to hold the latterin predetermined relation to said kerf-cutter and for limited movement relatively thereto with the outer surface of the plunger bearing against that wall of the kerf remote from said working face, and means for controlling the expansion of the plunger from said cylinder toward -form a kerf substantially in vertical alinement with the inner edges of the kerf formed by said horizontally extendingchain cutters, and pressure-exerting lmechanism mounted on one of the horizontal chain cutters.

62. In a mining machine, the combination with a supporting frame, of a pair of vertically spaced traveling kerf-cutters pivotally i mounted on said frame for lateral movement relatively thereto, means comprising an upright standard for connecting said kerfcut` ters, and an upright kerf-cutter having the shape of a segment of an annulus and carried by said standard in position to cut a kerf between the kerfs cut by said pair of kerfcutters.

63. The Vcombination with a mining machine having a kerf-cutter at its forward end, of spaced-apart bell cranks pivoted to the rear portion of said mining machine to oc` cupy upright planes parallel to the longitudinal length of the machine, and mechanism for operating said spaced-apart bell cranks to adjust the height of the rear end of the mining machine and therefore the inclination of said kerf-cutter at the forward end of the mining machine.

In testimony whereof I have signed my name to this specification, on this 17th` day i of November, A. D. 1917.

EDMUND C. MORGAN.

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