US1440791A

US1440791A - Mining and loading machine

Info

Publication number: US1440791A
Application number: US51332A
Authority: US
Inventors: Edmund C Morgan
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-09-18
Filing date: 1915-09-18
Publication date: 1923-01-02
Anticipated expiration: 1940-01-02

Description

Jam 29 E923. LMQ'QH E. C. MORGAN. MINING AND LOADING MACHINE. ORIGINAL FILED SEPT, 18. 1915. 5 SHEETS-suse? 1 mlm,"l

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xix

JaImI. 2, E923, EAQE E. C. MORGAN.

MINING AND LOADING MACHINE. ORIGINAL FILED SEPT, I8. i915. 6 SHEETS-SHEEY 2 HW" INU HI 7%@ ifm i @Mm-TMW Jam 2, 1923. MVQE E. C. MORGAN. MINING AND LOADING MAcH|NE.

- QRIGINAL F|LE0 SEPT. 18, 19T5.

6 SHEETS-SHEET 3 02 691 87 1 LZ 5? S57 Jam., 2, E923. RAMI-@,791

E. C. MORGAN. MINING AND LOADING MACHINE. ORIGINAL FILED SEPT. I8. 1915. 6 SHEETS-SHEET 4 Illllllll IIIII www;

Jan. Z, 1923.

L414g79l E. C. MORGAN.

MINING AND LOADING MACHINE. ORIGINAL FILED SEPT. 18, 1915. 6 SHEETS-SHEET 5 III' .Fgjg

Jaim. 2, w23., ,44@,7@l

E. C. MORGAN. MINING AND LOADING MACHINE.

ORIGINAL FILED SEPT. 18, 1915.

6 SHEETS-SHEET 6 wffnesa. M

fray@ To all whom t may cof/wervi- Be it known that I', EDMUND C. MORGAN, a citizen of the United States, residing at New York, in the county of New York and State outa New York, have invented certain new and useful Improvements in Mining and Loading Machines, of which the followi ing is a specification.

rlhis invention relates to. mining and loading apparatus, whereby material is completely severed from amine wall, and then moved .backwardly trom the mine wall into position to be loaded. @ne of the objects of my invention is to provide improvements l5 in the mining and loading machines disclosed in my Patents Nos. 1,325,031', dated December 16, 1919; 1,427,118, dated August 29, i922; 1,427,119, dated .august 29, i922;v

and 1,430,669, dated ctober 3, 1922. @ther objects of the invention will appear hereinafter.

The invention comprises the combination and arrangement of lparts'described in the following specification, shown in the accompanying drawings, and more particularly pointed out in the appended claims. l In the drawings- Fig. l is a side elevation of a mining ma'- chine embodying the present invention shown in position in a mine chamber.

Fig. 2 is a fragmentary sectional detail view'on line 2-2 ot Fig. 1.

Fig. 3 is a longitudinal sectional view on line 3 3 of Fig. 6. F'gs. 4 and 5 are details of the conveyer chain.

Fig. 6 is a top plan view partly broken away, of the complete machine.

Fig. 7 is a fragmentary 'top plan view 4o with parts broken away to show a part of the lower portion of the machine.

Figs. 8 and 9 are details of the flexible receiver for the severed material.

Fig. 10 is a bottom plan view of the flexible material receiver.

.I untreu stares carica.

EBE'IUND C. MQRGAN, OEFTEW YRE, 1F. Y.

MUFING ND LODNG MCHINE.

.application filed September 18; 1915, Serial No. 51,332.' Renewed october 15, 1919. Serial o. 330354.

Fig. 142 is a longitudinal sectional view on line -11F-1d of Fig. 18.

Fig. .15 is a top plan view with parts in section, showing the operating head for the cutter frame and connected parts.

Fig. 16 is a vertical sectional'view on line 16-16 of Fig. 15.

Fig. 17 is a detail view showing the arrangement of the gearing for moving the cutter frame and cri-operating parts.

Fig. 18 is a fragmentary horizontal sec- 'tional view showing the application to the mining machine or" the moditied form 0i material receiver shown in Figs. 12 and 13.

Fig. 19 is a fragmentary vertical sectional view showing the same modihed form o receiver.

Fig. 20is a detail cross section of the shalt for driving the modified torni of receiver.

rlhe mining machine shown in the accompanying drawings, which includes one ernbodiment of the present invention, belongs to lthat type oi machines which sever material to be mined by repeated arcuate cuts in the mine wall made by a loop cutter having an unobstructed core opening therethrough. ln the drawings a mining machine traine is provided, having a base plate 1 and side members 2 extending -upwardly from each side of the base plate, An inclined cross plate 3 extends from one side ot the machine to the other, and `connects the side plates 2,

vthus bracing these side plates to form a rigid structure, and at the same time providing a bed plate for the conveyer cha-in d, by means of which the material is carried upwardly and rearwardly to a loading position. At the forward end of the machine the side plates 2 are provided with enlarged bearing portions 5, having fiat upper surfaces on which `are mounted angle brackets 6,*havin'g slots 7 therein, through which extend set screws 8 for adjustably holding the brackets 6 to the bearing portions 5. The brackets 6 are provided at their forward ends with uprights9, to which is adjust/ably secured the cutter head frame 10 by means of' screws 11. ln this way an adjustable mounting is provided, by mea-ns of which the cutter head frame 10 is capable of adjustment horizontally and vertically relative to the mining machine trame, and by which any combination of these two adjustments may, ot' course, be secured.

` Secured to the front portion of the -cutter head frame 10 are two bearingsll, having detachable portions 12 held in place by bolts 13.- By this means circular bearings are provided for a cutter head drum 14, one bearing at each end of the drum. The drum 14 is mounted for rotation in the bearings 11 in a manner similar to that shown in mycopending application No. 49,689 referred to above. This drum -has a cutter frame 15'and a chain cutter 16 mounted for rotation with the drum 14, and provided with a sprocket wheel 17, motor 18 and gearing 19, all located within the drum 14 and rotatable therewith, and arranged tol drive the chain 16 in a manner fully disclosed in the above mentioned co-pending application Serial No. 46,- 689. Carried by the drum 14 for independent rotation thereon about a common axis therewith, is an ejector frame 20, comprising two arms 21 and a cross bar 22, Figs. 3` and 15. This frame is for the purpose. of forcing the coal baekwardly from the position it occupies after it has been severed by the cutter,

and may be termed a material follower frame. The ends of the arms 21 next to the drum 14 are provided with bearing rings 220, which surround the drum and have gears 23 secured thereto, by means of which the follower frame is rotated upon the drum. Rigidly secured to the drum 14, at one end thereof, adjacent one of the gears 23, is a third gear 24 for rotating the drum itself in the bearings 11. A motor 25 is mounted on the cutter head frame 16 near the central portion thereof, and is operatively connected with the

gears

23 and 24 by a chain ofgearing best shown in Figs. 15, 16and 17. Secured to the motor shaft 26 is a worm 27, which meshes with a pair of worm wheels 28 and 29. The upper worm wheel 28 is rigidly secured to a shaft 3() mounted in the walls of the casing 31, and provided with a sliding clutch 32.

Gears

33 and 34 are mounted for free rotation on the shaft 30, but are adapted to be clutched to the shaft by clutch 32. Gear 33 is of larger diameter than the gear 34, and meshes directly with a gear35 carried on a shaft 36.' The gear 34 meshes with an idle pinion 37, which in turn meshes with a gear 38 secured to the shaft 36.

'In this way the motor 25 may be operatively connected by means of the clutch 32 to drive the shaft 36 in either direction, and it is apparent that the motion in one direc` tion will be more rapid that the motion in the opposite direction. The shaft 36 carries pinions 39 at the ends thereof, which mesh with the gears 23, which rotate the follower frame 20 by means of the chain of gearing just described. The follower frame 20 may be given a slow and powerful rotation in a clockwise direction, as viewed in F ig. 3, and a rapid return movement in the opposite direction. This movement of of gears similar to that described above.

The Worm wheel 29 is mounted on a shaft 43, which carries gears 44 and 45 mounted for rotation thereon, and which mesh with gear 46 and pinion 47 respectively. The pinion 47 meshes with a gear 48 rigidly secured to a shaft 49, which shaft also rigidly carries the gear 46. Secured to the end of the shaft 49 is a pinion 50, which meshes with the gear. 24 on the drum 14. By means of this chain of gearing means is provided for imparting a slow and powerful movement to the cutter frame 15 ina counter-clockwise direction, as viewed in Fig. 3, and for imparting a rapid return movement in the opposite direction to the cutter frame. The movement of the frame is controlled by means of a clutch 51 co-operating with the gears 44 and 45, and operated in turn by clutch rod 52, bell crank levers 53 and handles 54 located at each side rof the machine directly beneath the handles 42y for controlling the follower frame.

Themovements of the cutter frame andA the follower frame are entirely independent of one another, although the two frames rotate about a common axis. Each frame is provided with an independent controller, and movement may be imparted to either at the will of the operator independently of the movement of the other. rdinarily in practice, the follower frame 20 will be in the movement of the frame 15, and immediately after the frame 15 has completed its cut the follower 20 will be started to rotate in a clockwise direction, and will carry with it the coal severed by the cutter, and force it onto a device to be described, by means of which it is removed from the mine. As soon as' the coal has been forced out of the way by the follower frame, the cutter frame and the follower frame will be returned by the rapid return mechanism previously described, to their original positions, preparatory for a second operation. Since, however, the movements of the 'two frames are independent of one another, this cycle of operations may be varied at the will of the operator to suit any exigencies that may arlse.

The mechanism for receiving the coal as .it is forced loackwardly by the follower weaver having 11p-turned ends 57 to form the sides of the trough. Extending from the edges of the plates 56 are a series of projections 58, which are bent backwardly in the form of loops, as shown in Fig. 8. The projections 58 of adjacent plates are arranged to alternate with'one another, as clearly shown .in Fig. 7, and a flattenedbar 59 is extended through the alternating loops and fits loosely therein, thus forming a somewhat ieXible joint between the edges of adjacent plates. The bar is rigidly secured to one of formed in the sides 2 of the mining machine frame, and arranged slightly above the bed plate 3 of the conveyer 4 and extending in a direction parallel with the bed plate. Slidably mounted in extensions or casings 68 at each end of the mining machine frame is a pair of rack bars 69, each bar being rigidly secured at its lower end to one of the slide blocks 66. A guide bar 69 is bolted to each of the side members 2 of the mining machine frame in positionito support the rack bars 69 when these bars are drawn'upwardly and rearwardly. rlhe rack bars 69 have teeth 70 alongv their lower edges, which mesh with pinions 71 secured to a shaft 72 at each end thereof, Figs. 1 and 2. rllhe shaft 72 is driven by a motor 73 through a chain 4of gearing, best shown in Figs. 3 and 11. rlhe motor 73 is mounted on the base plate 1' of the mining machine, and is provided with a shaft 74, which carries rigidly therewith gears 75 and 76. Gear 75- meshes with a gear 77 loosely mounted on a counter shaft 78 supported by a bearing pedestal 79. Gear 76 meshes with an idle pinion 80, which in turn meshes with a gear 81 loosely carried by the shaft 78. The shaft 78 is free to rotate in the bearing 79, and has a clutch 82 splined thereon, by means of which the gears 77 and 81 may be secured to the shaft for rotation therewith. Rigidly secured to the en-d of the shaft 78 is a sprocket wheel 83, which is provided with a sprocket chain 84 extending'through an opening 85 in the side of the mining machine frame to a sprocket wheel 86 rigid with a shaft 87 mounted in bearings 88 secured to the outer surface of the frame wall. The shaft 87 carries a beveled pinion 89, which meshes with a pinion 90 secured to the end of the shaft 72. By means of this chain of caring the shaft 72 may be r0.- tated in either direction, 'and thereby move the rack bars 69 and flexible receiver I'or trough 55 forwardly or rearwardly relative to the mining machine frame. A lever 91 is connected with the clutch 82 for controlling the forward and rearward movement of the flexible receiver. ln operation the receiver is driven by the mechanism just described, into the kerf formed by the cutter frame 15, the receiver being preferably caused to follow closely after the cutter frame until it reaches a position approximately that shown -in Fig. 1. ln this position the receiving trough is so located that the severed coal will either fall into it or be forced therein by the follower 20. rlhe movement of the follower frame 20 to force the coal from the position it assumes after it has been severed from the wall, slides the coal rearwardly over the receiver 55 onto the conveyer chain 4, wjhere the rearward movement is continuedl by the operation of this chain. The receiver 55 forms a guide or chute for directing the coal onto the conveyer chain. After all the coal has ybeen forced from the receiver onto the conveyer, and thence moved backwardly into loading position, the lever 91 is operated to move the receiver into retracted position, after which the machine may be moved forwardly. into position for another cut. As will be seen from the proportion of the gearing shown in Fig. 11, a rapid return movement of -the receiver is provided for.

The conveyer chain 4 which travels over the bed plate 3, and carries the material discharged from the receiver 55 to the rear of the machine, where it is discharged into a car 92 or other means of transportation, is also driven by the motor 73. The conveyer is connected to the motor 73 through a chain of gearing, which comprises pinion 93 mounted on shaft 74, gear 94, beveled gears 95 and 96, shaft 97, beveled gears 98 and 99. shaft 100, beveled gears 101 and 102, shaft 103, beveled

gears

104 and 105, and shaft- 106. The shaft 106 carries a roller over which the conveyer cha-in 4 passes, and by which it is driven. The lower end of the conveyer chain passes over a roller 107 located near the lower front portion of the machine. A plate 108 is provided for guiding the lower run of the conveyer chain. The movementI of the 'chain is controlled by a clutch 109 operated by a` lever 110, shown in Fig. 1. The conveyer belt itself may be of any suitable construction, one form being shown in Figs. 4 and 5. This form consists of a series of cross plates 111 hinged together by rods 112 extending from one side of the belt to theother. Any form of flexible belt may be substituted for that shown in the drawing.

In Figs. 12, 13, 14,' 18, 19 and 20 is shown a -modification of the invention. In the form shown in these views the follower frame is dispensed with, and the receiving trough is provided with a conveyer belt for transferring the coal which falls upon the receiver rearwardly to the elevating conveyer. The receiver employed in this form* A roller 116 is located near the frontedge ofthe receiver, and a conveyer belt 117 is guided over this roller and over a. similar' roller 118 at the rear end of the receiver. The roller 118 as shown in Figs. 18 and 19, has a beveled pinion 119 secured in one end thereof, which meshes with the beveled pin-- ion 120 carried on a telescoping shaft 121. The ends of the roller 118 protrude through arcuate slots 122 in the side members 2 of the mining machine framefand are guided by these slots as the receiver is moved into and out of operative position in a manner to be described. As shown in Fig. 12, the lower surface of thebed plate 113 is provided with a series of teeth 123 forming racks, one at each side of the receiver. These racks are arranged to mesh with pinions 124 carried on a shaft 125 journaled in the side members 2 of the mining machine frame, as shown in Figs. 13 and 19. Theshaft 125 has secured to one end thereof a pinion 126, F ig. 18, which meshes with a second pinion 127 secured to a shaft 128. A- motor 129 is mounted on the base pla-te 1 of the mining4 machine frame, and is arranged to drive through intermediate gearing the shaft 125 and the roller 118. A pinion 130 carried on the shaft of the motor 129, meshes with a gear 131 rigidly/secured to a sleeve 132, which is in turn free to rotate on a` shaft 133, see Figs. 14 and 18. The gear 131 and sleeve 132 may be clutched to the shaft 133 by a. clutch 134 (F ig. 14) operated by a lever 135 (Fig. 18). A beveled pinion 136 is carried on the end of the shaft 133, and meshes with al beveled pinion 137 secured to the telescoping shaft 121. The shaft 121 consists of two parts, as shown in Fig. 20, splined together .for movement longitudinally relative to one another, but held for rotation together. By means of the mechanism described, when the shaft 133 is clutched to the gear 131 by means of the clutch 134, the pinion 119 and roller 118 will be caused to rotate, and the conveyer belt 117 will be driven in\a direction to move the material thereon rearwardly onto the conve-yer belt 4. As the receiver 113, together with its conveyer117, are moved into and out of operative posi- Ipinion 139 carried by counter shaft 140. Se-

cured to the shaft 140 are two

gears

141 and 142, which are driven by

gears

143 and 144 respectively mounted. for free rotation on the sleeve 132. An idle pinion 145 is imposed 'between the

gears

142 and 144, while the

gears

141 and 143 mesh directly. The

gears

143 and 144 may be clutched to the -sleeve 132 by a clutch 146 operated by a.

lever 147. y means of this mechanism a comparatively slow rotation may be impartedY to the shaft 125 for moving the receiver 113 into inoperative position, and a quick return movement may be imparted to the shaft for retracting the receiver into Yoperative positionfwhen it is desired to shift the machine forward preparatory to making a new cut.

ln operating'this form of the device a kerf is madeby the cutter frame 15 in the manner described in connection with the other form, and after the cutter frame has entered the material a suHicient distance the receiver 113 is moved forwardly into position to receive the severed material. During the movement of the receiving frame into operative position the driving connection between the motor and the belt 117 may be broken, the belt 117 remaining at rest until. the receiver is in operative position. Motion is then imparted to the conveyer chain by operation of the clutch -134, and terial which falls upon the receiver iS carried backwardly and deposited on the conveyer belt 4, which transfers the material to the discharge position in the manner previously described. l/Vhen the material is completely severed by the cutter 15 it will all move by gravity onto the receiver, breaking up to a greater or less extent into smaller divisions and will thence be carried to the rear part of the mining machine. After the discharge in this manner of all of the severed material, the shaft 125 will be rotated to retract the receiver, after which the mining machine is moved forwardly into position to make a second cut.

The form shown in Fig. 19 is covered'by claims in my co-pending application, Serial No. 85,243,filed March 20, 1916, for an improvement in mining machines.

It will be understood by those skilled in any mameager. A

ther-art that many changes may be made in the United. States, is:

Y i. in a mining machine, in'combination, means for severing material' to be mined. va flexible receiving. trough 'for said material, means .for vpositioning said -dexible 2. in a'mining machine, the combination ivi th a.supporting frame,-.of cutting mech- 7 "1 '.anisin inountedy on said frame in position l' ....for feeding movement' relatively thereto to .cnt pa' curved lrerf in the material to be mined, means for operating said cutting .mechanism including feeding movement thereof relative to said supporting frame iio'fcutsuch` curved kerf, a-receiving trough mounted onsaid frame in position to extend forwardly therefrom, and means for moving said trough relatively to said frame into the curved kerf under the cut material to receive the latter and support the same freely `hy gravity.

3. ln a mining machine, the combination with a supporting frame, of means mounted Vthereon for severing material to he mined,

areceiving trough for `said material and.

yconnected. to ysaid frame toocc'upy a curved position, and means for, exerting pressure on the yrear .portion of saidtrough to' force saidjtrough along a curved path t`o receive f the severed material.

4. ln a mining machine, the

froma lowerposition in advance of said frame,'means for operating said kerf cutting mechanism including arcuate feeding .frame and extending in advance vthereof from its' forward end in position to enter said arcuatekerf, the forward edgeof said receiving trough heing unobstructed, and iiieans for exerting Ypressure on the rear portion of said trough for moving thelatter intp 1said arcuate kerf Abelow the cut-materia.

5. in a mining machine, the combination with a supporting frame, of means mounted thereon in position to dislodge an arcuate core of material, a trough connected to said frame and extending 'therefrom alonga curved path in position for receiving the severed material, said trough having a forward edge thereof entirely free and unobstructed, and means for vmoving said trough into position to receive thesevered material.

6. in a mining machine, the combinationcombination'A lwith a supporting frame, of mechanism .for cutting an arcuate kerf extending upwardly with a supporting frame, of kerf cutting from the mine wall, and means for exerting force on the rear portion of said trough for moving the flexible forward portions thereof along the arcuate kerf made by said kerf cutting mechanism.

7, ln a mining machine, the combination with a supporting frame, of core cutting mechanism mounted thereon, means for operating said core cutting mechanism, means mounted on said supporting frame in position to receive cut material, and means independent of said core cutting mechanism and its operating means for moving said receiving means forwardly in advance of said supporting frame and relatively thereto into position .to receive material cut by said core cutting mechanism.

8. in a mining machine, the combination with a supporting frame, of kerf cutting mechanism mounted on said Supportingk frame to swing on a horizontal axis, means for operatingsaid lrerf cutting mechanism including arcuate feed thereof on such hori-v zontal afgis, Aa receiver mounted on said frame, and means independent of said kerf cutting mechanism for'moving said receiver moving said receiver into the arcuate kerf' formed by said cutter for receiving the material severed by said cutter.

x10. ln a mining machine, an arcuate core cutter, a flexible receiver for the severed Vmaterial, and means for exerting force on the rear portion of said receiver for moving said receiver in an arc into position to receive material severed by said cutter.

l1. in a mining machine, a device for forming an arcuate kei-f in the material to be mined, a Hexible receiver having an unobstructed forward edge, and means independent of said korf-forming means for enerting'pressure on the rear portion of said receiver for moving said receiver into the said kerf.

i2. lin a'mining machine, a cutter bar arranged to move'about a pivotal axis for forming an arcuate kei-f in the material to be mined, a Atleirilole receiving trough having an unobstructed 4forward edge, and means independent of said cutter for exerting pressure on the rear portion of-said trough to 'force said trough into the kerf formed by said cutter.

13. iin a mining machine, the combination ice' ed thereon in position to cut an arcuate lrerf with, a' supporting frame, of a cutter mounted thereon in position for forming an arcaate kerf in the material to be mined, a receiver connected to said frame and extending therefrom in a curved position, and

ceiver, and means for moving said receiver into the kerf formed by said cutter, the movement of said receiver in said kerf being 4independent of the movement of said cutter.

15. In a mining machine, the combination with a supportingffame, of kerf cutting mechanism mounted on said frame for swinging movement on a Substantially horizontal axis, means for operating' said kerf cuttingA mechanism including arcuate feed thereof on such horizontal axis, a receiver connected to said supporting frame, and means for actuating said receiver to move the same partially into the mine Wallalong the kerf cut by'v said kerf cutting mechanism, and permit said receiver to remain in such position independently of the arcuate feeding movement of said kerf cutting mechanism.

16. in a mining machine, the combination with a supporting frame, of a cutter mountin the material to be mined to sever said material from the mine Wall, a receiver connected to said frame and extending therefrom to occupy-an arcuate position, and means for cansino said receiver to move along a portion of the Wav into said arcuate kerf, said means being arranged to permit said receiver to remain in thearcu ate position thus assumed while the cutter continues its feeding movement.

17. ln a mining machine, a cutter mount ed for pivotal movement about an axis forA forming an arcuate korf in the material to be mined to sever said material from the mine Wall, a flexible receiver, actuating means for said receiver arranged vto move said receiver a portion of the Way into the lrerfformed by said .cutter and to permit said receiver to remain in the position thus assumed independently of the movement of said cutter.

18. ln a mining machine, the combination with a` supporting frame, mechanism mounted thereon for feeding movement relatively thereto, .a receiver mounted on said frame for movement relatively thereto and'adapted to follow said kerfcutting mechanism alongthe first portion of the irerf cut thereby, means for actuating said of kerf-cutting Laaavei.

mechanism including feeding movement'` thereof relatively to said supporting frame while said receiver remains in receiving position. I

19. ln a mining machine, the combination with a supporting fra-me, of a lrerf-cut-ter mounted thereonb for movement about va pivotal axis to form an arcuate herf in the material to be mined to sever said material from the mine wall, a receiver for the severed material, said receiver being connected to said frame, means for moving` said receiver relatively to said frame into the lower portion only of the arcuate lrerf in arcuate alinement with the path of said nerf-cutter in position for receiving the severed mad terial, and means for operating said .herfcutte'r, including arcuate feedingn thereof relatively to said frame while said receiver remainsin such projected receiving; position.

QOQA mining machine comprising a supporting` frame, a materiali-receiving trough mounted on said frame for movement relatively thereto in advance of said frame to extend forwardly from said frame in position to receive material from an uprightmine Wall, means independent of the forward movement of said trough in advance of said frame but mounted on said frame in position for forcing material from an upright mine. Wall into said trough and mechanism for operating said forcing means to cause the same to engage dislodged material and positively move the same downwardly from the mine Wall into said trough While the latter er tends forwardly in advance of said frame in its adjusted position.

21. A mining machine comprising a. supportingI frame, a flexible material receiving trough adapted to extend into an arcuate upwardly extending lierf in an upright mine wall, and a follower iounted on said frame in position for forcing material from the mine wall into said trough.

22. A mining machine comprising a supporting frame, a material-receiving trough mounted on said frame and extending for- Wardlytherefrom int-o position for receivin material directly from an upright mine vval and a device mounted on the forward end of said frame to swing on a transverse axis from an upright position toward said trough' to positively force. material from the upright mine Wall into said trough.

23. ln a mining machine, the combination with a. supporting frame, of a material-receiving trough adapted to enter an arcuate kerf in a. mine Wall, means for moving said trough forwardly into such arcuate kerf in position to receive material, and a swing# ing device for forcing the material into said trough. v y I 24.A A mining machine comprising al supporting traine, a flexible material-receiving trough, means for exerting pressure on the rear 'portion of said trough for forcing the -same torwardlyrelatively to said supporting :trame into poslt-ion to receive material to be mined, a. follower mounted on said frame for pivotal movement about a horizontal axis in position to act on an upright mine wall, and means for swinging said follower about said axis for forcing material trom an upright mine wall onto said trough. 25. A mining machine comprising a supporting frame, cutting mechanism mounted on said tra-me for completely cutting a section of material froma mine wall, a pushing follower mounted onsaid frame for movement relatively' thereto, and means for operating said follower to cause the same to engage the cut-out body of materia-l in the position assumed thereby after being out, and pushing such cut material away from such position.

26. ln a mining machine, the combination with a supportin opening therethrough and mounted on theV forward end of said Jframe tor swinging 4 feeding movement on a transverse axis to cut out completely from an upright mine wall a crescent-shaped core of material, means for operating said core-cutting mechanism in cluding swinging feeding movement thereof on such transverse axis, a follower mounted on said frame Jrfor swinging movement rela.- tively thereto independently o the swinging feeding movement of said core-cutting mechanism, and means for operatlng said follower tovcause the same to engage the upper end of said crescent-shaped core ort' material Aand positively move such core ot material downwardly and backwardly from the unmined mass.

28. ln a mining machine, the combination with a supporting frame, of core cutting mechanism mounted thereon and having an unobstructed core opening therethrough. a follower mounted on said frame in position structed frame, of cutting mechanism mounted t ereon for feeding move-f' yfor.engaging the cut core 'of material, and

means `lor operating said follower to force the core of material from its cut phsition while moving said follower through said unobstructed core opening independently ot movement of said core cutting mechanism.

29. lln a mining machine, the combination with a loop'core-cutter .having an unobcore-opening therethrough, of means for operating said loop core-cutter to cut a core of material in an upright mine wall, a follower for removing the core material, and, means for supporting said follower and Said loop core-cutter for independent pivoted' movement about a common axis, with the follower adapted to pass through the unobstructed'core-opening ot said loop core-cutter to occupy a position on either side of said core-cutter.

30. ln a mining machine, a pivotally mounted U-shaped cutter trame, a loop cutter carried by said cutter frame, a follower for removing material severed by said cutter, said cutter and follower being arranged for pivotal movement about a common axis, means for rotating said cutter about said axis, and means for imparting movement to said follower about said axis independent of the movement of said cutter. 31. ln a mining machine, the combination ywith a supporting frame, of core-cutting mechanism mounted thereon and having an unobstructed core opening therethrough, a device engagins the cut material trom above and downwardly rearwardly from the mine wall, and mechanism in position for receiving the dislodged terial.

32. ln a mining machine, the combination with a supporting trame, o? hert-cutting mechanism mountedethereon for movement relatively thereto on a transverse axis, a receiver connected to said trame for movement relatively thereto to pos' ions in advance thereof, means for moving said receiver relatively 'to said trame the kerl"- ormed by said kertcutting mechanism independently of movement of the latter, and a, device mounted on said frame in position ior sliding the severed material from its position in the mine wall onto said receiver.

33. ln a mining machine, a pivoted Uf shaped cutter for Jforming a korf in material to be mined, a. exible receiver, means for moving said receiver into the hert formed by said cutter, and a pivotally mounted tollower arranged to Contact with the material severed` by said cutter and to force said material onto and over said receiver.

34. ln 'a mining machine, the combination with a cutter for severing material to ne mined, of a receiving trough for the severed material` a conveyor, and a device cons tacting with the severed material to push the same over said trough onto said conveyer.

35. In a. mining machine, a U-shaped cutter frame, -a loop cutter carried by said cutter frame, means for moving said cutter and cutter frame about'a pivotal axis to form a kerf in the material to be mined for severing said material from the mine wall, a receiving trough for the severed, material, means independent of said cutter frame for moving said trough into the kerf formed by said cutter, and a follower.for contacting with the material severed by said cutter and for forcing saidmaterial onto said receiving trough. 36. ln a mining machine, a pivotally mounted lll-shaped frame, aloop cutter carried by said frame, means forrotating said frame and cutter about their axis to form a kerf in thematerial to be mined, a flexible receiving trough, means independent of said cutter frame for moving said trough-into the lierf formed' by said cutter, a follower mounted for pivotal movement about the axis of said cutter frame, .and means for vmoving said follower independently of the movement of said cutr frame for contacting with the material severed by vsaid cutter to force said material trough.

37. ln a mining machine, a pivotally" mounted lll-shaped cutter frame, a loop cutter carried by said cutter frame, means for moving said cutter frame and cutter about their axis to form a kerf in the material to be mined, a flexible receiving trough, means independent of said cutter frame for moving said trough into the kerf formed by said.

cutter, a conveyor, a follower mounted for l pivotal movement about the axis of said cut- Ater frame, and means for moving said follower about said axis independentlyof the movement of said cutter frame for contacting with the material severed by said cutter to force said material over said receiver onto said conveyer.

38. t minmg machine comprising a supporting frame, a receiving trough connected f to said fra-me in position to enter an arcui ate upwardly extending kerf in a mine wall,

said trough comprising a series of transverse plates pivotally connected to render said trough llexible for entering such kerf, and means at the lateral edges of said plates for limiting pivotal movement relatively to one another without interfering with free movement of said trough along said arcuate herf.A

l 39. A mining machine comprising a supporting frame, a receiving trough connected to said frame and extending in advance thereof in position for entering an arcuate upwardly extending lrerf in a mine wall, said trough comprising a series of transverse plates having upturned ends to form the sides of said trough, and means connecting the ad'acent lateral edges of said lates for limite pivotal movement relative y to one onto said receiving` anotheritorender saidtrough flexible for movement along such arcuate kerf. 4:0. A vreceiving trough for a mining ma-- chine, comprisinga plurality of platesexextending through the loops of contiguous 'edges of adjacent plates* and fitting' loosely therein to provide a limited pivotal movement of adjacentplates relative toene another.

41. A mining machine comprising a supporting frame, a flexible receiving device positioned-at Aone end of saidfr'ame for entrance freely into an arcuate kerf-.in a mine wall, and meansl for exertingpressure on the rear portion of said receiving device to force the same forwardly, relatively to said frame into such arc'uate kerf in position to receive kerf.v l

42. In a mining and loading machine, the combination wtith a supporting frame, of a conveyer mounted f thereon and extendiing. longitudinally 'thereof l from a yforward receiving position rearwardly Itoward loading position, a flexible receiver .carried at the forward portion of said. 'frame and adapted to extend beyond said conveyer along a curved path, and means for moving xwvsaid flexible receiver bodily forwardly longitudinally of said frame and arcuately along said curved path and vfor moving said receiver rearwardlylongitudinally of said frame, to

edect the gathering of a load and the movement thereof into position for delivery onto said oonveyer.

43. ln a mining and loading machine. the combination with a supporting frame, of a receiving device connected at its rear end to the forward portion of said frame, the forward portion of said receiving device heing adapted to move over the floor `of a mine chamber at the base of an upright mine wall in advance of said frame, a conveyer mountedon said frame and extending longitudinally thereof from a forward receiving position adjacent said receiving device, and means for moving said receiving device bodily forward and rearward relatively to said supporting frame and longitudinally thereof to cause the forward projecting portion of said receiving device to move freely over said door under dislodged material at the base of a mine wall to. gather a load of such dislodged material and move it rearwardly along said frame into position for delivery to said conveyer.

44. ln a mining machine, the combination with a supporting frame, of a receiving trough, guideways on said frame for uiding said receiving trough along said rame dislodged material adjacent #such i the vertical adjustment of encarar into av positiion'extending trom the lower forward 'end of said frame inv advance thereof, said trough being adapted to' be retracted rearwardly along said frame to occupy a position" above the tor-ward portion of said trame with the forward end ot said receiving trough adjacent the forward end ot said frame and extending. rearwardly from the forward end ot said trame, a motor mounted on said trame, and connections between said motor and said trough for transmitting power to the latter to move the same along said guideways into a receiving position in advance oi the lower forward end of said frame, and to move said trough rearwardly along said guideways into a retracted position with the ton.

ward end of said trough adjacent the lower vforward end ci' said trame' and extending rearwardly from said lower forward end or' 'said trame.

45. lin combination, a` mining machine frame, guideways in said frame, a ilexible receiving trough, guides carried by the rear end ot said receiving trough tor cooperation with said guideways, rack bars secured to said guides, and vmeans for moving said rack bars to exert pressure on the rear end of Said receiving trough to move said receiving trough forwardly into operating position.

ad. ln a mining machine, the combination with a supporting trame, of an angle bracket carried by the upper forward portion oit said supporting trame and adjustable horizontally thereon, a. cutter head carried .by said angle bracket and adjustable vertically and rectilinearly relatively to said bracket while the latter and said supporting trame remain stationary, and mechanism carried by said cutter head for cutting a core of materia-l in an upright mine Wall in accordance with the adjustment in elevation ot said cutterv head relatively to said angle bracket and in accordance with the adjustment ot said angle bracketliorizontally relatively' to said supporting frame.

d?. ln a mining machine, the combination with a supporting trame having a Jforward upper horizontal bearing Surface of an angle bracket having a horizontal bearing surface adjustably supported on the first named bearing surface, said angle bracket having a vertical supporting bar with a bearing surtace facing forward, a cutter head carried by said vert-ical supporting bar for rectilinear adjustment vertically, and core cutting mechanism mounted on said cutter head for cutting an upright crescent-shaped core of material in accordance with the adjustment of said bracket relatively to said' supporting frame and in accordance with said cutter head relatively to said bracket.

48. ln a mining machine, the combinationof a pair of angle brackets adjustably se' l cured longitudinally of said bearing surfaces, said angle brackets having spaced apart vertical supporting bars at. the torward portions thereof with forwardly extending bearing surfaces, loop chain core cutting mechanism having an unobstructed core opening therethrough tor the passa-ge of an upright crescent-shaped core, and means for adjustably mounting said core cutting mechanism on said vertical supporting bars, whereby the horizontal axis of rotation oit' said loop chain core cutting -n'iech-l anism may ce held at adjusted elevations approximately midway between the door and roof of a mine chamber, and whereby said horizontal axis ci? rotation may held in adjusted posit-ion forward of said supportingirame.

49. ln a mining machine, the combination with Ia cutter trame, of an axle on which said cutter trame is mounted torv pivotal movement, a gear rigidly secured to said axle, an additional gear mounted for rotation relatively to said axle, an ejector oonnected to said additional gear, separate power transmission mechanisms connected to said gears, and means for independently controlling said power transmissionmecha- -nisms 50. ln a. mining machinefthe combination with a supporting frame, of an axle journalied on said trame, a cutter trame connected to said axle to rotate bodily therewith, a cutter, an ejector trame journalled on said supporting frame and Iassociated with said cutter trame in position to eject material cut by said cutter, and means tor effecting the'rotation of'said `cutter iframe and said ejector fra-me relatively to said supporting trame and independently of each other.

5i. in a mining machine, an axle, a cutter trame rigidly secured to said axle, a material moving frame pivotally mounted on said axle, means for rotating said axle and cutter trame, means for rotating said material moving trame about said axle, and means tor independently controlling the movement ot said frames. t

52. ln a mining machine, an axle, a cutter frame mounted on said axle, a material moving frame mounted on said axle, means for producing a relatively slow movement ot said cutter frame in one direction and a. rela-tively rapid movement of said cutter frame in the opposite direction, means for producing a relativel slow movement ol' said material moving trame in one direction and a relatively rapid movement of said material moving frame in the opposite direc- 54. ln-a `mining machine, a hollow axle, a.

cutter frame carried by said axle, a cutter mounted on .said cutter frame, means 1ocated within said vaxle for operating said cutter, a material moving frame carried by said axle, and mechanism located exteriorly of said axle for independently rotating said cutter frame and said material moving frame.

55. In a mining machine, an axle, a cutter frame rigidly secured to said axle, a gear rigidly secured to said axle, a second gear rotatably mounted on said axle, a material moving follower rotatably mountedon said axle and secured to said second-mentioned gear, and mechanism for rotating said gears independently of one another.

56. In. a mining machine, a cutter frame, a rotary axle on which said cutter frame is carried, a material moving follower rotatably mounted' on said axle, a gear secured to said axle for rotating said` axle and said cutter frame, a second gear rotatably mounted on said axle and secured to said follower for rotating said follower about said axle, a

motor, means forconnecting said gears to said motor, andmeans for independently controlling the movement imparted by said motor to said ears?.

57. lin a mining'machine, a cutter frame and a material moving follower frame having a common axis of rotation, means for independently imparting relatively slow movement to said frames in opposite directions, and means for independently imparting rapid return movement to said frames. 58. lin a mining machine, a cutter head,

an axle mounted for rotation in said head,

a cutter framecarried by said axle for rotation therewith, a material moving follower carried by said axle for rotation thereon, a

vmotor, two sets -of gearing driven` by said motor each set of gearing being arranged for producing dierent speeds of rotation in opuposite directions, means for connecting said rotary axle With/one of said sets of gearing to be driven thereby means for connecting said material moving follower with the other of said 'sets of gearing to be driven thereby, and independent means for controlling said sets of gearing.

59. ln a mining machine, a lll-shaped cutter frame, a hollow axle onl which said frame is mountedfor rotation therewith, a cutter chain carried by said frame, a Imoto-r posiandrei tioned within said axle for driving said cutter chain, a gear rigidly secured to said axle, a material moving follower. rotatably mounted on said axle a gear secured to said follower for rotating said follower relati e to said axle, a motor located exteriorlyjov said axle, a train of gearing connecting said motor with said first mentioned gear and provided with 'mechanism for driving said gearY at diderent rates of speed in opposite directions, and a second set of gearing for connecting said second mentioned gear and material moving follower with' said motor, and provided with mechanism for driving said second gear independently of the niet gear at different rates of speed in opposite directions.

60. In a mining machine, the combination with a supporting frame, of kerf cutting mechanism mounted thereon, means for operating said kerf cutting mechanism to form anarcuate kerf in the material to be mined, a receiver adapted to occupy a position having aradiusof curvature substantially equal to the radius of curvature of the hert formed by said kerf cutting mechanism, guides for said receiver arranged to. direct said. receiver relatively to said frameA into the said arcuate lerf, means for moving said receiverl relatively to said framel into and out of receiving position, and conveyer mechanism associated with sfaid receiver for moving position.

dislodged material toward loading with a supporting frame, of means for dislodging material to be mined, a device for receiving severed material, a conveyer mounted on said supporting frame and extending longitudinally thereof rearwardly from a forward receiving position near sail receiving device, mechanism for moving said receiving device from above the forward end of said supporting frame into operative position in advance of the lower forward end .of said supporting frame over the door of the mine chamber, driving mechanism for said-conveyor, and means for controlling the operation of saiddislodging means and of said conveyer and of said receiving device moving means independently of each other.

62. ln a mining machine, the combination with a supporting frame, of a receiver connected thereto and adapted to extend in advance thereof along an `upwardly extending curved kerf, uptu'rined portions at the sides of said receiver to form an arcuate trough when said receiver extends in advance of said frame into said curved korf, means for ltlt lll)

moving the receiver into and out of operative position, mechanism mounted on said frame for dislodging material from an upright mine wall into said trough, and a conveyer extending longitudinally of said supmiami' porting traine in approximate alinement with said trough and -in position to transfer toward loading position material received from said trough.

63. In a mining machine, the combination with a supporting trame,l of core cutting mechanism mounted on said frame and having an'V unobstructed core opening therethrough, and an ejector mounted on said trame' for movement relatively thereto through such-unobstructed core opening to move the core of material from its position with a supporting trame, or loop chain core cutting mechanism mounted on said frame andhaving an unobstructed core opening therethrough, of means .tor operating said core cutting mechanism, ejector mechanism mounted on said supporting frame in posi-` tion to entend alon 'material in the position assumed thereby imthe entire-mass of cut mediately after being out, and. means for opn erating said ejector mechanism independ-l ently of the operation of said core cutting mechanism' to move the severed material backfrom the mine wall by acting on the same the position assumed thereby after being cut. v Y

66. -lln a mining machine, the combination with a frame, of loop chain core cutting mechanism mounted on said lframe, 'means 'for' operating said core cutting mechanism to cut an upright crescent shaped'section of material from its native bed, and ejector mechanism mounted on said trame for engaging the cut section of material and pushing it' from its position assumed after being severed. y

67. ln a mining machine, the combination with a supporting frame, ot hert-cutting mechanism mounted on said frame for swinging feeding movement relatively thereto, means for operating Said hert-cutting mechanism, and a receiver mounted on said frame for movement relativelythere'tol independently of movementot said korf-cutting `mechanism and .adapted to extend forwardly yin advance of said frame in position 'to move along the lier cut by said hert-cutting mechanism and in position to receive material dislodged above such hert.

68. In a mining machine, thel combination with a supporting frame, of korf-cutting mechanism mounted thereon, means tor opthe mine erating said korf cutting vmechanism to out an arcuate korf, a receiver connected to said 1:trame and adapted) to extend thereronr j along such arcuate korf, and means for exerting pressure on the rear portion ot said receiver to force the same along said arcuate kort into receiving position.

69. ln a mining machine, the combination with a supporting frame, of hert-cutting .mechanism mounted thereon in position tor feeding movement relatively thereto to cut an upwardly extending curved lrerf in the' material to be mined, means for supporting said cutting mechanism including upward Vfeeding movement thereof relatively to said supporting frame to cut such curved keii while said supporting frame remains stationary, a receiver mounted on said frame in v position to extend orwardlyfroni the lower forward end of said frame, means for coni'ining said receiver to positions adjacent the lower forward end of said frame, and means for moving said` receiver relatively to said frame into said curved hert under the'ciit material to receive the latter.

70. ln a mining machine, the combination with a supporting frame, of mechanism for cutting an arcuate kerit extending upwardly from a lower position in advance of said frame, -means for operating said hert cuttingmechanism including arcuate 'feed thereof, a receiver mounted on said frame andvextending in advance thereof from its forward lower portion in position to enter said arcuate korf, and means for exerting pressure on the rear portion of said receiver for moving the latter longitudinally oi itself into said arcuate hert below the cut material.

7l. ln a mining machine, the combination with a supporting trame, ot vkerl-cuttingniechanism mounted thereon for Jfeeding movement relatively thereto and in position to cut a korf in a mine Wall extending torwardly ifrom a position substantially at the eff cut by said kerf-cutting mechanism below the out material to receive the latter as soon as dislodged.

72. ln a mining machine, the combination with a .supporting traine, of korf-cutting mechanism mounted for swinging' feeding movement on 'a horizontal transverse anis on the upper forward end of said frame in position for cutting an arcuate hertl extending forwardly into a mine wall from the base toward the roof, a receiver connected to said frame and movable relatively the-reto to extend forwardly in advance 01E the lower forward lend of said frame into s uch ker, and means for actuating said receiver indeto extend said receiver into such korf by into arcuate position in the lierf causing said receiver to follow said kerfcutting mechanism into receiving position under the material already cut by said lrerfcutting mechanism.

73. AIn a mining machine, the combination with a supporting frame, of lrerf cutting mechanism mounted thereon, means for operating said lrerf cutting mechanism including arcuate feed thereof to cut an arcuate kerf in the material to be mined, a receiver connected to said frame and having an unobstructed forward edge and adapted to assume an arcuate shape, and means for operating said receiver to move the same into said arcuate herf in arcuate position to receive cut material when dislodged.

7 d. lin a' mining machine, the combination with a supporting frame, of lrerf cutting mechanism pivotaily mounted on said frame, means for operating said kerf cutting mechanism including arcuate feed thereof, to-cut an arcuate kerf in the material to be mined, a Horrible receiver connected to said frame and having an unobstructed forward edge, and means for exerting pressure on the rear portion of said receiver to force the same formed by said lrerf cutting1 mechanism.

7 5. In a mining machine, the combination with a supporting frame, of korf-'cutting mechanism l mounted thereon, means for operating said lrerf cutting mechanism including arcuate feed thereof to out an arcuate kerf in the material to be mined, a receivermounted on said frame in position to extend arcuately into such arcuate lrerf under the cut material while the latter remains integral with the unmined mass, and a conveyer mounted on said supporting `frame withits forward portion in receiving position at the rear end of said receiver.

7 6. ln a mining machine, the combination with a supporting frame, of korf-cutting mechanism mounted thereon for feeding movement relatively thereto, means for operating said kerfwcutting mechanism to cut a kerf extending forwardly into the mine wall, a receiver mounted on said frame for movement relatively thereto inde endently of any movement of said korf-cutting mechanism and adapted to occupy a position to receive cut material, and a conveyor mounted on said supporting frame in position to receive dislodged material from said receiver.

77. lin a mining machine, the combination with a supporting frame, of kerf cutting.

mechanism mounted thereon, means for operating said lrerf cutting mechanism, a receiver connected to said supporting frame, inclined guides for saidreceiver arranged to direct said receiver into the kerf formed by said kerf cutting mechanism,'means for moving the receiver into and out of receiving position, and conveyor mechanism in position on said frame to receive dislodged` its retracted position above the forward portion of said conveyor.

7 9. lin a mining machine, the combination with a supporting frame, of cutting mechanism mounted thereon, a receiver connected to said frame and movable relatively thereto so as toextend beyond said frame into receiving position in advance of said frame, a conveyor extending longitudinally of said supporting frame from a forward receiving position adjacent the rear end of said receiver when the latter isin its forward receiving position, fand guideways on said supporting frame for guiding said receiver relatively to said supporting frame to a retracted position above Said conveyor while the rear end of said receiver remains in communication .with said conveyer back of the forward end ofthe latter.

80. ln a mining machine, the combination with a supporting frame, of an endless conveyor having superposed portions travelling in 'opposite' directions and adapted to convey material from the forward portion of said frame toward the rear end thereof, core cutting mechanism having an unobstructed core opening therethrough and mounted to swing on a horizontal axis on the forward end of said frame, means for operating said core cutting mechanism to cut an upright crescentashaped core in a mine wall in advance of said frame, a flexible receiving trough connected to said frame and adapted to extend in advance thereof in anvarc under the lower portion of said core during continuation of feeding movement of said .core cutting mechanism, means forA advancingl and retracting said receiving trough relatively to said supporting frame, substantially straight guideways on said frame for guiding the rear end of said receiving trough along said frame while confining such rear end of said receiving trough to positions above said conveyor and closely adjacent thereto for continual communication between said receiving trough and said conveyor, an ejector frame mounted on the horizontal axis to move in an arc through the unobstructed core opening of said core llt) manger said ejector frame independently of t-he operation of said core cutting mechanism.

81. In a mining machine, .the combina-A tion with a supporting frame, of a materialrcceiving device connected to said frame and adapted to extend forwardly therefrom into a previously c ut upwardly extending arcuate kerf below a core of material still intact and still integral with the unmined mass and means for dislodging such core onto said receiving device and moving said core along said receiving device away from the mine wall.

82. A mining machine comprising av supporting frameA` a flexible receiving device connected to said frame and adapted to extend into an arcuate upwardly extending kerf in an upright mine wall, and atollower mounted on said trame in position tor forcing material Jfrom a mine wall along said receiving device.

83. A mining machine comprising a supporting frame, a material-receiver mounted on said frame and adapted to extend forwardlytherefrom into position for receiving material directly from an upright mine wall` and mechanism mounted on said frame and adapted to occupy a position above its swinging axis to move in an arc from such position forwardly and downwardly to torce material from the mine wall into said receiver.

8l. A mining machine comprising a supporting frame, a material-receiving device adapted to occupy an arcuate position, means tor exerting a pressure on the rear portion of said device for forcing the same toi-wardly relatively to said supporting trame into position to receive material to be mined, a follower pivoted on a horizontal axis at the forward end of said frame for movement trom a position above said axis forwardly and downwardly along an arc to act on material at an upright mine wall, and means for swinging such follower about said axis and along said arc for forcing material from the mine wall into said receiving device and along the same.

85. ln a mining machine, the combination with a supporting frame, of a material-receiving devicev adapted to extend in advance of said supporting frame and along lan arcuate kerf in a mine wall, means for moving said receiving device forwardly relatively to said frame into such arcuate kerf in position to receive material, and means mounted -on Said 'frame to move material downwardly from the mine wall into said receiving* device.

86. ln a mining machine. the combination with a supporting trame, of a llexible receiving device adapted to extend in advance of said frame into an arcuate kerf extending upwardly r:from the base of .a mine'wall, a-

conveyer extending longitudinally or' said trame from a. forward receiving position adjacent the rear end'of said receiving device when the latter is extended forward into receiving position in said kerf, and means for guiding the rear end of said receiving device along said frame to re-l tracted positionwith the rear end of said receiving device continually in communication with the said conveyer.

87: A mining machine comprising a supporting frame, a receiver connected to said :trame in position to enter'- an arcuate upwardly extending kerf in a mine wall, said receiver comprising a series of transverse plates, and means at the lateral transverse edges of said plates for pivotally connecting them together for relative limited movement without interfering with the free movement ot said receiver along said arcuate kert.

88. A mining machine comprising a supporting frame, a receiver connected to said frame and extending in advance thereof in position for entering an arcuate upwardly extending lrerf in a mine wall, said receiver comprising a plurality of plates pivotally connected at their transverse edges for limited movement relatively to one another to render said receiver flexible for movement along said arcuate kerf, and means tor dislodging -material from a mine wall onto such receiver.

89. ln a mining and loading machine, the combination with a supporting trame. of a conveyer comprising superposed portions traveling in opposite directions and'extending longitudinally ot said frame from a forward receiving position at the lower forward portion of said trame on an upward incline toward the rear end of said frame, a receiverconnected to said frame t'or bodily movement relatively thereto to positions extending over the floor of the mine chamber in advance ot said :trame in approximate longitudinal alinement with said conveyer., and means for moving said receiver bodily forward longitudinually of said trame and relatively thereto in advance thereof over such mine floor under dislodged material i'or receiving a load of such material, said moving means being also capable of moving said receiver rearwardly along said conveyer into position for delivery ot' such load trom said receiver onto said conve-yer.

90. In aA mining machine, the combination with a supporting trame, of an axle journalled on said trame, a cutter trame rigidly connected to said axle to rotate bodily therewith and--having an unobstructed core opening therethrough, an endless 'chain cutter mounted on said cutter-trame, means carried wholly by said axle for actuating said chain cutter, an ejector' frame lnounted to swing on the axis of said axle and associated with said cutter-frame in position to move through the same to eject material cut by said chain cutter, means for swinging said cutter-frame to effect arcuate feeding movement of said chain cutter duringl the actuation of the latter, and means for independently swinging said ejector frame to act on the core cut by said cutter to move the core away from the mine wall.

91. ln a mining machine, the combination with a supporting frame having two forwardly extending spaced-apart arms, of azhollow axle drum journalled at its end portions in said arms, a cutter frame having anv unobstructed core opening and connected to said axle to rotate bodily therewith, a chain cutter' mounted on said cutter frame, means located within said axle for driving said chain cutter, a gear mounted on said axle concentrically therewith, means mounted on said supporting frame for transmitting rot-ary feeding movement to said gear and said axle to secure arcuate feeding movement of said chain cutter to cut an upright crescent-shaped core of material 1n a mine wall, an ejector frame mounted for swinging movement between said arms on the axis of said axle and in position for movement through'the unobstructed core opening of said cutter frame, spaced apart gears connected to said ejector frame concentrically wit-h said axle, and means mounted on said supporting frame for transmitting power to said spaced apart gears to effect arcuate movement of said ejector frame to cause the latter to engage such crescent-shaped core of material and move the same away from the mine wall after the completion of the feeding' stroke of said chain cutter.

92. ln a mining machine, the combination with a supporting frame having spaced apart forwardly projecting arms at the upper forward portion thereof, of a hollow axle drum journalled in said arms for swinging movement on a substantially horizontal transverse axis, a chain cutter frame connected to said axle to move bodily therewith, said frame having an unobstructed core opening therethrough, a chain cutter mounted on said cutter frame, means mounted within said axle for driving. said chain cutter, a gear concentric with said axle and connected thereto to rotate therewith, means mounted onsaid supporting frame intermediate said arms for transmitting power to said gear to effect arcuate feeding movement of said chain cutter from the base of a mine wall in an upward direction to effect the cutting of an upright crescent-shaped core of material. an ejector nazional frame journalled for swinging movement between said arms on the axis of said axle and in position to move through the unobstructed core opening of said cutter frame, gearing connected to said ejector frame concentrically with the axis of said axle, and means mounted between said arms for transmitting power Yto said gearing independently of the feeding movement of said cutter to effect movement of said ejector frame in adownward direction after the completion of said core, to engage the latter and move the same away from the mine wall and from the position which it assumes after being cut.

93. ln a mining machine, the combination with a supporting frame, of core cutting mechanism having an unobstructed core opening therethrough and mounted for swinging movement on a substantially horizontal transverse axis in advance of said frame, means for permitting the adjustment of said horizontal axis in a. direction longitudinal of the supporting frame and to and from the forward lower end thereof, means for permitting the adjustment of said horizontal axis in elevation, and mea-ns for adjusting the radial length of said core cuttingniechanism in accordance with the horizontal and vertical adjustments of said axis.

9d. in a mining machine, the combination witha supporting frame, of core cutting mechanism comprising a U-shaped cutter frame having an unobstructed core opening therethrough, a. supplemental frame mounted on said supporting frame for horizontal forward and rearward adjustment longitudinally of said supporting frame, a cutter-head mounted on said-supplemental frame for vertical adjustment in elevation and supporting said core cutting mechanism for swinging feeding movement on a substantially horizontal axis` and means for permitting adjust-ment of said tl-shaped frame in accordance with the position of said horizontal axis.

' 95. In a mining machine, the combination with an elongated Supporting frame, of a chute extending longitudinally of said frame from a forward receiving position near the lower forward end of said frame on an upward incline toward the rear of said frame. an endless conveyer having superposed por- 'tions travelling in opposite directions. core cutting mechanism vmounted on the upper forward end of said frame for swinging movement on a substantially horizontal axis, means for operating said core cutting mechanism to cut an upright crescent-shaped core of material in a mine wall in advance of the forward end of said frame. ejector mechanism operable independently of said core cutting mechanism to act in a downwardly extending arc on the cut material to move lll llt