US1824953A - Mining machine - Google Patents

Description

MINING MACHINE Filed June s. 1929 2 sheets-sneer 1 Sept.v 29,' 1931. M P, HOLMES 1,824,953

MINING MACHINE Filed June 3, 1929 2 Sheets-Sheet 2 g N@ -m' .3 015453, 10 a7 fg Il E l] 14 M l 23 69 ijf-jf 57 if W33 610 I Wr/207557527072212 Patented sept. 29, 1931 MORRIS 1?. HOLMES, OF CLAREMNT, `NEW HAMPSHIRE, yJLSSTGFIFOR` T0 SULLIVAN MACHINERY COlvIPA-l'iY',v A CORPORATION -OF `MASSAGHUSETTS aivrimne MACHINE :Applicatie-mi,filedzilune 3, ,1929. .-SerialNoifGSJM.

This inventionrelates to mining machines andY more particularly pertains to co al mining :machines ofthe flexibly fed, continuous cutter type. l

An object of this yinvention 1s toy provide an improved coal miningrmachme and more Yparticularly an improved mining machinev of theilexibly fed, continuous cutter type 4having improved ilexible-feeding `and, guidobject is to -provide ing means. 'Another improved `flexible feeding and guiding means for. a mining machine of the aforesaid type wherein a plurality ofrelatively rotatable feed operating .and controlling members Y are employed which. are adapted to draw in and-pay out in an improved mannercooper-k ating flexible feed-ing means whereby the ma chine may be. fed and guided in an improved selectively in opposite directions at either` speed iwithout reversing ,the machine .driving motor. VStill another object is tol provideI an improved multi-drumy cable feeding .mechanismfor a coal mining machine wherein separate driving and; controlling means .are provi dedfor each drum whereby'the drums may be driven either separately or simultaneously l at relatively slow speed oratrelativelyhligh speed.Y and selectively in either direction .at either speed while'the machine driving motor runs continuously Lin the same direction. Another Vob] ect is to provide in a'feeding mechani sm of the aforesaidtype an improved transmission mechanism yincluding Y separate reversing' mechanisms embodied inthe drive for each feeding .member and also including a separate fastlandslowV speed drivejfor each feeding'membein A further obj ect of. this .invention is to provide in aminingmachine of theY aforesaid type improvedpfeeding mecha-4 .ed claims.

nism including a feed kdrum'and a controlling; drum and improved driving mechanism for each drum operative.to eect drive thereof either in winding direction orunwinding dif c rectionseparately orsimultaneously atarelatively s'low'cutting speed or at a relatively high "machine moving speed, .and including meansto` permit rotationof said drums'in unwndingv direction underv various degrees of rictional resistance, or to permit Vsaid drums to revolve reelyinunwinding direction.

other object is to provide'van improved room and pillarA coal mining machine ofthel tlowvein type especially adapted to use in mines having narroivorlow'veins of coal. These and other objects .and advantages of this in-l l vention will, however, more fully appear in 'the course of the following description and as more particularly` pointed out in the append- In the accompanying.` drawings l`there is shown for purposes of illustration one embodiment which the invention may assume in practice.

y'In these drawings,.-

;Fig.`.1 is a top plan view of the improved mining machine, thecutter bar lbeing partially broken away. Y X

Figg2 isa vside elevational view of the mafr :chine shown in Fig. 1. l y

.3 is a horizontal sectional viewY taken substantially on line 3-j3 of 2.

n Fig. 4`is a central, longitudinally extending, vertical .sectionalyiew taken substan- 'tially on line LL-l of Figs. 1 and 3.

In thisillustrative construction there is shown a mining machineof the flexibly fed, continuous cutter, room and pillar type comprising a low compact. liframe 1 of4 generally rectangular shape havinga smooth bottom surface 2 adapted to rest upon and slide in any ydirection over the mine Hoor. The frame 1 comprises a centralrmotor section. 3 supportedona bedk section Lland interposed between the .cutter and vfeed frame sections 3y TES PATE-NT OFFICE and 6, these frame sections when united forme ing a rigid low compact frameon which the various mechanisms .of the machine are supported. As shown, the cutter frame section 5 is disposed at the forward end of the machine frame and projecting forwardly from the cutter frame and rigidly secured thereto trolling members 9 and 10 and cooperating with said members are flexible feeding elements 11 and 12 respectively, the feed operating and controlling members and their cooperating feeding elements being herein in the, form of winding drumscooperating with feed cables or. ropes.k Housed within the motor frame section3 is a horizontal motor 13 having its power shaft 14 horizontallydisposed and extending longitudinally of the machine frame and driving from its opposites "ends respectively vthe lcutting and feeding mechanisms, the` motor being of the type adapted toeffect drive of thefeeding and cutting mechanisms selectively in opposite directions and which herein may be of the reversible electric type The'cutting mechanism andthe driving mechanism therefor are of the same general design as those described in a copending application, Serial No. 312,732, filed October 15, 1928. The cutterdriving mechanism generally comprises a bevel pinion 15v suitably rigidly fixed to the forward end ofthe motor shaft 14 and meshing with a bevel gear 16.

' Ihis -bevel gearV drives a spur pinion 17 meshing with a larger spur. gear 18 connectiblein a manner clearly described in the copending application mentioned above, in driving relation with the cutter chain SQ As the specific construction of thev cutting mechanism does not specifically enter into this invention, further description ofthe Ysame'is thought Vto be Now referring to theimproved flexible feeding'means, it will be noted that mechanism is provided operative to effect rotation of the winding drums 9 and 10 selectively in winding vor unwinding direction either separately or 'simultaneously at a relatively slow cutting speed or at a relatively high machine movingspeed without reversing the machine driving motor, and includes means operative to permit the winding drums to revolvein unwinding direction under various degrees ofl frictional resistance or to revolve freelyV in unwinding direction. To attain these functions a separate and distinct plural speed reversible driving -connection is employed for each drum and includes a fast speed gear herein preferably formed integral with a horizontal longitudinally extending shaft 22 having its axis arranged parallel with and in Y a plane below the motor shaft. This shaft 22' is journaled in ball bearings 23 suitably supported within the feed frame section and has also formed integral therewith a spur pinion 24 meshing-with the spur gear 25 secured as by a key 26 to a horizontal shaft 27 having its axis arranged parallel with and in a plane below the shafts 14 and 22. As shown in Fig. 4, this shaft 27 is journaled in ball bearings 28v suitably supported within the feed frame section and has secured thereto as by a ley-29 .at its rear end a bevel pinion 30. This bevel pinion meshes with a bevel gear 31 secured asrrby a key 32 to a vertical shaft 33. This shaft 33 is journaled at itsupper and lower endsand intermediate its ends inball bearings 34 suitably supported by the feed frame section. Secured to the shaft 33 is a worm 35 and secured as by a key 36 to the upper end of this shaft is a spur gear `37 meshing vwith a larger spur gear 38 secured as by a key 39 to avertical shaft 40 arranged parallel with and in the rear ofthe shaft 33.

Y This shaft40 is journaled'at its upper and in opposite directions, the worm 35 being a Afast speed worm while the worm 42 is a slow speed worm.

In this instance, meshing with the worm 35 at opposite sides thereof are fast speed worm wheels 43 and'44 connectible by friction disc clutches 45 and 46 to horizontal longitudinally extending shafts 47 and 48 respectively. These shafts are arranged in parallel relation'and their axesa-re disposed in vertical planes spaced eeuidistantlv at each side of the longitudinal center of the machine. These worin wheels 43 and 44 are vdriven in the same direction and are supported on their respective shafts on ball bearings 49 and 50. respectivelysupported by the shafts. while these shafts lare each iournaled in ball bearings 51 and 52 suitably supported within the feed frame section. Meshing with the opposite sides of the slow speed worm 42 and driven bythe latter in the same direction areslow speed worm Wheels 53 and 54 connectible by friction disc clutches 55 and 56 to the shafts 47 and 48 respectively. As the friction vclu'tcheswithin the worm wheels 43,44,

53 and'54 are substantially identical in derotatably mounted within the rear end wallV of the machine frame. This nut is formed iiitegral with an operating' handle 65. i Similar operating mechanism is employed for the friction clutches 46 and '56 and includes yan operating handle 67.V i i i Secured to the forward ends of the shafts 47 and 48 respectivelysare bevel vpinion-s 68 and 69. As illustrated, the bevel pinion 68 meshes with the reverse bevels and 71 jouriialed on ball bearings 72 supported on a hori- `Zonctal shaft 73. 4This shaft 7 3 extends transversely of the machine and is'journaled in ball bearings 74 suitably suported within the feed frame section. Thereverse bevels 70 Vand 71'are selectively -connectible by friction disc clutches 75 and 76 respectively to the shaft 731:0 effect rotation :of the latter -selective-ly in opposite directions. Suitably secured as by a -key 77 to theouter endlof the shaft '7 3 is a spur-pinion 78 meshing with an internal gear 79 herein formed integral with y the feed drum 9.

Again referring to the drivingcennections for the controlli-ng drum 10, it will be observed that the bevel pinion .691meshes with 'reverse' bevels 8O` and 81 journaled on ball bearings 82 supported'by a-horiZon-tal shaft 83. T his shaft 83 is aline'd with the shaft 78 and is jonrnaled in ball bearings 84 suitably supported within the feed frame section. The reverse bevels `and 81 are selectively connectible to the shaft 82 by frictiony disc clutches 85and 86 respectively to effect rotation of the shaft 83 selectively in opposite directions. Sec-uned as by akey 87 to the outer end of the shaft 88 is'a spur pinion 88 meshingl with an internalY gear 89 herein formed integral with the drum 10. As shown in Fig. 3., the drums .9 and 10 are each journaled on the side of the machine frame on va laterally projecting stub shaft- .90 formed integra-l with a plate member 91 secured as byl screws 92 to'the side of the machine frame. Supported on this ,stub shaft 90 are ball bearings 93 on which the winding Idrum is `rotatably supported. The winding drum and supporting bearings therefor are held against axial displacement from the stub shaft by means 'of a screw and washer connection 94 and the complete bearing -structurerfor the drum is arranged within a boi'e95 formed within the drum. The operating' mechanism for the `clutches 75 and 76 -within the reverse bevels 70 and 7l comprises a shipper yoke 96 suitably mountedV at 97 within the feed frame section This shipper yoke is pivotally connected at 98 yto a longitudinally extending operating rod 99 having a suitable operating handle 100 conveniently located yat the rear end of the machine adjacent the control handle 66 for the speed controlling clutches foi the drum 9. Similar operating' mechanism is mployed for controlling. the clutches 85 and '86 within the reverse bevels 80 and 81 and includes a pivoted shipper yoke 101, an operatiiigY rod 102 and a controlling handle 103 located adjacent the other clutch control handle 67. It will thus he -seeii that when the proper friction clutches within the Worm wheels are applied and upon suitable application of the proper friction clutches within the reverse bevels, the feed and controlling drums 9V and 10 may be rotated selectively in opposite directions at either a relatively high speed or at a relatively low speed.

Means are provided for guiding the cables 11 and 12 during` the various operations of the machine and herein comprise guide sheaves 105, 106 disposed on opposite sides of the forward end ofthe machine frame, each of these guide sheaves being supported by a pivote'd swing arm 107 in turn carried by a bracket v108 secured asby a screw 109 to a side of the cutter frame section 5.y Arranged atthe opposite sides of the rear end of the machineframe are `guide sheaves-110 and 111 eachmounted on asupport 112 secured as by screws 118 to the side of the feed frame section '6. As shown in Figs. 1 and 2, when the machine iscutting from right to left, the cable 11 extends from the top of the feed drum 9 rforwardly along the side of the machine and around the front guide sheave laterally from the front end'of the machine.

The controlling cable 12 entends from the bottoni of the controlling drum rearwardly along the side of the machine, around the guide sheave 111 laterally from the rear end of the machine. When the machine is cutting from Vleft to right, the cable 11 is passed laround the rear guide sheave while the cable 12 is extended along the side of the machine and around the front guide sheave The operation of the machine will now be described. The machine is propelled about the mine While mountedon itstransport truck and when'the work-ing place is reached, the machine is'unloaded from the truck onto the mine floor in a well known manner. The cable 12 is then extended from the drumv 10 forwardly along the side of the machine around the front guide sheave 106 and forwardly from the machine to a suitable anchor -or-roof jack located adjacent the coal face at the right hand rib. The operator then manipulates the control handle 67, swinging the shipper yoke 60 into a position to apply the friction clutch- 46 within the fast speed Y machine is fed bodily over the mine floor to a position adjacent the coal face at the right hand side of the room, the friction clutch 46 thereafter being released. If it is desired, the machine may be movedover the mine bottom at a fast speed by means of the feed drum 9 and cooperating feed cable l1, or under some conditions both the cables l1 and l2 may be used to feed the machine. After the machine is suitably positioned adjacent the coal face, the cable 12 is Idisconnected from the front guide sheave 106 while still retaining its connection with the jack and the cable l1 is extended from the feed drum 9 forwardly along the side of the machine around the front guide sheave 105 and laterally from the front end of the machine transversely across the coal face to a suitable anchor or rib jack located adjacent the face at 'Y the lefthand rib. rlhe cutter chain 8 is then connected to the motor and the friction clutch 56 within the slow speed worm wheel 54 is then applied and the clutch 86 1s loaded and the drum 10 is rotated' at a relatively slow cutting speed in a direction to wind in the cable l2, thereby moving. the machine forwardly toward the face to effect the sumpingA cut, the clutch 56 thereafter being released. As the cutter bar is sumped into the coal, the feed drum 9 is rotated in a direction to maintain the feed cable ll under tension, thereby guiding the machine as the cutter bar is sumped beneath the coal face. If desired.

' the feed drum 9 and feed cable 10 maybe used to sump the cutter bar beneath the coal or under some conditions both the cables 11 and 12 may be extended to anchors adjacent the coal face and wound in to effect sumping` of the cutter bar.` After the cutter bar has been sumped vbeneath the coal face the operator applies the clutch 55 within the slow speed worm wheel 53 and upon application of the clutch Z 5 within the bevel gear 70 the feed drum 9 may be rotated in a direction tov wind in the feed cable 11 and the machine is straightened up and fed transversely across the coal face at a cutting speed. At the same time the clutch 56 within the worm wheel 54 is applied and the controlling drum 10 is rotated in a direction to wind in the controlling cable 12, but due to the opposing forces caused by the pull of the feed cable 1l on the forward end'of the machine and the reaction of the cutters against the coal, the controlling` cable 1Q is nulledv olf from the drum 10 under the frictional resistance of the friction clutch 56. lf it is desired f during the transverse cutting operation to angle the cutter bar` the operator may release the controlling drum 10 from its drive,

Ythereby permitting the drum to rotatefreely Vcontrolling cable 12,y thereby swinging the rear end of the machine rearwardly and angling the cutter bar. The cutter bar may be swung forwardly also by the application of the fast speed friction clutch 45 t0 cause the feed drum 9 to wind in the feed cable 1l at a relatively high speed. It will be evident that by the provision of the reversebevels 80 an-d 81 the controlling drum 10 may be ro tated in a direction to unwind the controlling cable 12 while the feed drum 9`is rotated in direction to windv in the feed cable 11 during` the transverse cutting operation, the drum 10 paying out the cable 12 at the same rate as the drum 9 windsin the feed cable 11. At the end 'of the transverse cut, the machine is angled relative to the coal face and the feed cable 11 is disconnected from its jack and the front guide sheave 105 and extended from the feed drum 9 to an anchor or roof iack located at the rear of the machine. The drum 9 is then rotated in a direction to wind in the cable 11 at a relatively slow speed and the cutter bar is withdrawn from the coal. The machine is then hauled over the mine bottom at a relatively high speed by one or the other. or both. of the cables 11 and 12 and loaded onto a transport truck. Other operations of the improved miningr machine will be clearly apparent to those skilled in the art.

As a result of this invention it will be noted that an improved mininff machine is .provided having improved feeding mechanism whereby the machine may be fed and guided in an improved manner; It will further be Vnoted that an improved mining machine feeding mechanism is provided of the multidrum tvpe having improved driving and controlling means for the drums whereby the latter may be rotated lselectively in opposite directions without reversing the machine driving motor, either separately or simultaneously.A at relatively high speed or at relatively slow speed, may rotate in unwinding direction under various degrees of operatorcontrolled frictional resistance, or may rotate freely in unwinding direction. It will further be noted that the improved feeding mechanism is of a symmetrical and well balanced design` the driving connections between the motor and each of the drums being identical in construction. thereby enabling a substantialV number of the parts to be duplicated with a resultant decrease in the cost of manufacture.

selectively in Opposite n speed vwithout reversing `said motor.

While there is in this application specilically described lone yembodiment which the invention may'assume inpractic'e, will be understood that thisv form of the' same is shown for purposes of illustration and that the invention may be modified and embodied in various other formsl withoutdeparting fromtlie spirit oi the scope oi'theappendd claims'. l

, A What l claim y.as newA and desire tol secure by Letters Patent is:

1. ln a' min'iig machine, a motor, cutting mechanism` driven thereby including 'an elongated hert cutter, -and feeding means driven by said motor including relatively ro*-V tatable reed operating and controlling memberseacli adapted tocooperatewith flexible feedingmeans and mechanism for independ Y ently driving said'memb'ers at Ieither a rela'- tively low speed" yor a krelatively hioh speedY ouslyv but with one revolving at a` different speed from the other.

2. In a mining machine, mechanism driven thereby` includingy an elongated hert cutter, and feeding `means driven by said motor including relatively rotatable feed operating and' controlling members'eacli ad'aptedl'to cooperate witi. lieXiblefeed/ing ineans and a plural speedk V. reversible transmission mechanism for each memberithi'ough which it but not the other member may b Vdrivenwherebyfspaid membeismay be independently driven at either a relativelylow speed or a relatively high Y, speed vand selectively in opposite directions at eitlieil speed while saidmotor runs continuously in yone direction.

3. kIn a mining machine, a motor, cuttingmechanism driven' thereby including an elongated hert cutter, and Vfeeding. means driven by said motor including relatively ro# tatable feed operating and controlling memberseach adapted to `cooperate withflexible feeding means and kseparate plural speed y, driving connections for each member through which itbutiiiot the other membercan be driven wlierebyisaid members may be driven either separately or'simultaneously at arela'- tively low speed or a relatively high speed and directions aty either Ll. ln a mining machine, a motor, cutting mechanism driven thereby including an elongated kerl cutter, and feeding means driven y by said motor including relatively rotatable y y n bers each adapted to cooperate feeding means.` and separate' plural speed driving Y ,connections for each-- member feed operating and controlling niemdirection under various a motor, cutting" gated hert cutter,

linea-ns and separate with flexible through ywhich'it but not vother member can be driven whereby said vmembers may be ydriven either separately .or simultaneously lat a relativelyilow speedor a relatively highl speed and selectively in opposite directions' at neitherv speedwithout reversing said motor, said driving 'connections including nieans'whereby said members may rotate in one direction' under various degrees oi frictional resistance. i

In a mining machine, av motor, cutting mechanism driventhereby including an elongated ler'fcutter, and'feeding'means driven by said niotoi` including relatively rotatable feed operating;- and controlling members each adapted to cooperate with leXible feedmeans and separate yplural speeddrivme" which it Vbut not the other member canlii'e driveiiwhereby saidy members maybe driven either separately or relatively low' speed or -a'relatively high speedv eand selectively iii opposite directions at eitherspeed without-'reversing saidino# tor, said driving connections including means whereby said members may rotate in one degrees of frictional resistance or vfreely.

6; kIn a mining machine,- a motor, cuttingl mechanism'k fdriven thereby including an elongated hert' cutter, and feeding means driven by said motor including relatively rotatable ieedoperating and controlling members each adapted to cooperate with lieXible feeding means and separate plural speed driving connections for each member through which itbut'not the othermember can be driven whereby said members maybe'driven either separately or simultaneously'ata relatively low speed or a'relativelyV high-speed and selectively ina directionto draw in vsaid flexible feeding means at directionto pay out'vsaid flexible feeding means at either speed allwitliout reversing said motor, said vdriving connections includ-lV ing'iiieans wherebysaid members may rotate f in adir 4ctionto pay out said flexible feeding meansV under variousl degrees of rictional resistance. l Y y i 7. In a miningmachin'e, a-motoi, cutting mechanismk driven thereby including an elonand feeding means driven by said motor v includingA relatively rotatable co'nn'ections'or each member through f simultaneously Vat a either speed or in a Si 'teedoperati'ng'and controlling members each' Y adapted to cooperate with flexible feeding plural speed driving connections for each member through which it but not thefotherfnieniber can vbe'driven whereby'said meni'bersinay be" driven either separately ing said motor, said drivingconnections in-v or simultaneously at va relatively n vlow speed or 'akrelatively'higli speed and'seby said motorvincluding relatively rotatable feed operatingr and controlling members each adapted to cooperate with flexible feeding means and driving connections for said members including a separate reversingr mechanism for each Ymember'whereby said members may be independently driven selectively in opposite directions and at the same angular speed in either direction while said motor runs continuously in the same direction.- Y

9. In a mining machine, a motor, cutting mechanismV driven vthereby. including l an elongated lerf cutter, and feeding means driven by said motor including relatively rotatable feed operating and controlling members each adapted to cooperate with flexible feeding means and vfast and slow speed driving connections for said members including a separate reversing mechanism for each member whereby said members may be independently driven selectively in opposite directions at either speed'while saidv motor runs continuously in the same direc* tion.

10. In a miningmachine, a motor, cutting mechanism driven thereby including an elongated lrerf cutter, and feeding means driven by said motor including relatively rotatable feed operating and controlling Vmembers each adapted to cooperate with` flexible feeding means anddriving mechanism for said members including separate reversible gear trains for each member through which it but not the other member may be driven for independently driving said members selectively in opposite directions and at the same angularspeed in either direction without reversing said motor.

ll. Ina mining machine, a motor, cutting 1 mechanism driven thereby including an elongated kerf cutter, and feeding mea-ns driven by said motor including relatively rotatable feed operating and controlling members each adapted to cooperate with flexible feeding Y j means and driving mechanism for said mem# bersincluding separate fast and slowsspeed gear trains for each member through which vit but not the other member can be driven forV independently driving saidmembers at either va relatively slow speed or at a relatively high Y v v either speed without reversing said motor.

speed and selectively in opposite directions at 12. In a mining machine, avmotor, cutting mechanism driven thereby including an elongated lerf Glitter, and feeding means driven by said motor includingrelatively rotatable frictionally controlled 'tionally controlled reversing mechanism for Vin opposite directions at eithery speed without reversing said motor. s s

13. In a mining machine, a motor, cutting mechanism driven thereby including an elongated lerf cutter, and feeding means driven by said motor including relatively rotatable feed operating and controlling members each adapted to cooperate with flexible feeding means and driving mechanism for said members including separate fast and slow speed gear trains and a reversing mechanism for each member through which it but not the other member can be driven for independent,- ly driving said members at either a relatively slow speed of a relatively high speed and selectively in opposite directions at either speed without reversing said motor.

14. In a mining machine, a motor, cutting mechanism driven thereby including an elongated lrerfvcutter, and feeding means driven bysaid motor including relatively rotatable feed operating and controlling members each adapted to cooperate with flexible feeding means and'driving mechanism for said members including'separate fast and slow speed gear trains foreach member through which it but not the other member can be driven and having a separate Vfrictional control for each speed for independently driving said members at either a relatively slow speed or a. relatively high speed and selectively in opposite directions at either speed Without reversing said motor.

15. In a mining machine, a motor, cutting mechanism driven thereby including an elongated kerf cutter, and feeding means driven by said motor including relatively rotatable feed operating and controlling members each adapted to cooperate with flexible feeding means and driving mechanism for said members including separate fast and slow speed gear trains and a friceach member through which it but not the other member can be driven for independently driving said members at either a relatively slow speed or arelatively high speed and selectively in opposite directions at either speed without reversing said motor.

lo.Y In a mining machine, a motor, cutting mechanism driven thereby including anelon gatedv kerf cutter, and feeding mechanism driven by vsaid motor including relatively ingress.,

rotatable feed -loperat'ing and controlling members each adapted to cooperatewith flexible feeding meansand mechanism forlinde-k pendently driving said members including a separate plural speed transmission mechan-ism and. a reversing mechanism for eachinember whereby saidl members may ber'd'riven at either speed without reversing said motor. y

l?. 1n a miningmachine feeding mecha'- nisni, motor, arotatable feed member adaptedjto cooperate directly with flexible feeding means, driving connections-between said motor andsaid member for rotating' the latter in either-of opposite directionsat the saine and including reversing angular speed, means', a relatively rotatable controlling `member adapted 'to cooperate directly withflexible controlling mea-ns, `and a separate and distinct driving connection between said motor and said controlling member.

i8. In a miningfmachine feeding mechanism, a motor, avrotatablefeed member adapted to cooperate directly with" flexiblefeeding means, driving connections between said motor and feed member for rotating the latter at relatively high speed or at relatively low speed and including reversingme-ans for effecting rotation of ysaid. member ineitlier of opposite directions at either speed and without reversing said motor, arelatively` rotatable controlling member adapted to cooperate directly with flexible controlling means, and a separate and trolling member.v

19; ln a mining machine msm, relatively rotatable feedingmembers disposed with their axes parallel to a transverse vertical plane and each adapted'to co- 1 operate directly with flexible feeding means,

and motor operated devices-for driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relativel hi'ch s eed or h b at relatively low speed including a separatev and distinct plural speed transmission mechanism for each member, each transmissionv mechanism including alongitudinally VVextending shaft, afast speed gear train, and a slow speed gear train, each gear train including a terminalgear coaxial with said shaft and coniiectible to drive the same.v f i 20. ln a mining machine feeding jmechanism, relatively rotatable feeding members disposed with their axes lparallel to a transverse vertical plane and each adapted to Vcooperate directlywithflexible feeding means, and motor operated devices for'driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at 4relatively high speed or'at relatively low speed including a separate lfand distinct plural speed transmissionmecha plurality of predetermined speeds and selectively in opposite directions at distinct "driving connection between said motor and said confeeding mecha-v Vand a slow speed gear train,'each including al terminal gear-coaxial with said anism for each member, each transmission mechanism including a longitudinally Vextending sha-ft, a fast speed gear train, a-slow speed gear train, terminal gear coaxial-with said shaft, and friction clutches one individual to each terminal gear for connecting saidV gears in driving relation with said shaft. i

211 n a' mining machine feeding mechanism,.relatively rotatable feeding members eachadapted to coopei'atedirectly with ilexible feeding` means, and motor operatedidevices for driving said members either sepa-V rately or .simultaneously in a direction to draw in their means at relatively highspeed or at relatively low speed including alined shafts one con-A nected to each. member, and a separate and distinct plural speed transmission mechanism f for each shaft, each transmission mechanism including a longitudinally extending shaft, y

afast speed gear train, and a slow speed gear train, each gear tra' i including a terminal gear coaxial with sai iflongitudinal shaft' and connectible to drive the same.V

22. ln aininin'g machine feeding mechanism, relatively rotatable feeding members cach adaptedto cooperate directly with flexible feeding means, and motor operated devices ior driving said members either separately or simultaneously means at relatively high speed or at relatively low speed including alined shafts one connected to each member, and a separate and distinct plural speed transmission mechanism mechameans at relatively high speed or at relatively low speed including alined horizontal shafts one connected to each member and a separate and distinct plural speedtransmission mechanism 'for each shaft, each transmission mechanism `including a longitudinally extendingshaft, a fast speed gear train, gear train longitudinal shaft andv connectible to drive the latter. r K 24. In a mining machine feeding mechanism, relatively rotatable feeding members each adapted to-coo'peralte directly with Hexeacli gear train includinga v respective flexible feeding Vin a direction tol draw in their respective flexible feedinglmembers Sil f Ci

'flexible feeding means,

train, each gear train including a terminal gear coaxial with said longitudinal shaft and connectible to drive the latter.

fln` a mining machine feeding mechanism, relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including alined shafts one connected to each member, a separate and distinct plural speed transmission mechanism for each shaft, each transmission mechanism,including a longitudinally extending shaft, a fast speed gear train, a slow speed gear train, each gear train including a yterminal, gear coaxial with said longitudi-V nal shaft, and a reversing mechanism coaxial with each alined shaft.

26. ln a mining machine feeding mechanism, relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including alined shafts one connected to each member, a separate andY distinct plural speed transmission mechanism for each shaft, each transmission mechanism including a longitudinally extending shaft, a fast speed gear train, a slow speed gear train, each gear train including a terminal gear coaxial with said'longitudinal shaft, andL friction clutches one individual to each terminal gear for connecting said gears in driving relation with said shaft, and a reversing mechanism coaxial with each alined shaft.

27. ln a mining machine feeding mechanism, relatively rotatable feeding members each adapted to cooperate directly with and motor operated devices for driving said members either separately or simultaneously in a direction" to draw in their lrespective flexible feeding means at relatively high speed or at relativelylow speed including alined shafts one connected to 'eachmemben a separate and distinct plural speed transmission mechanism for `each shaft, eachY transmission mechanism including av longitudinally extending shaft, afast speed gear train, and a slow speed gear train, each gear train including aterminal gear coaxial with said longitudinal shaft, and a reversing mechanism coaxial with each alined shaft including vreversely rotatable gears coaxial with each alined shaft and friction clutches for selectively connecting said reversing gears tc their respective shafts.

28. In amining machine feeding mechanism, relatively rotatable feeding members each adaptedto cooperate'directly with iiexible feeding means, and motor operated devices forv driving -said members either separately or simultaneously in a vdirection tok draw in theirfrespective Yiiexible feeding` means at relatively high speed or at relatively `low speed including alined shafts one connected to each member anda separate and distinct plural speed transmission mechanism for each shaft, each transmission mechanism including a longitudinally extending shaft, a fast speed gear train, a slow speed gear train, each gear train including a terminal gear coaxial with said longitudinal shaft, and friction clutches one indvidual to each terminal gear for connecting said gears in driving relation with said shaft, and a reversing mechanism coaxial with each alined shaft including reversely rotatable gears coaxialwith each alined shaft and friction clutches for selectively connecting said reversing gears to their respective shafts.

29. In a mining machine feeding mechanism, relatively rotatableV feeding members disposed with their axes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members either Vseparately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or atV relatively low speed including a separate and distinct plural speed transmission mechanism for each member, each transmission mechanism including a longitudinally extending shaft, a fast speed gear train, anda slow speed gear train, each gear train including a worm wheel coaxial with said shaft.

'In a mining machine feeding mechanism, relatively rotatable feeding members disposed with their axes parallel to a transverse vertical plane .and each adapted to cooperate directlywith flexible feeding means, and motor operated devices for driving said members either separately or simultaneously 1n ardirection to draw in their respective ilexible feeding means at relatively high speedor at relatively low speed including a separate and distinct plural speed transmission mechanism for each member', each transmission mechanism including a longitudinally extending shaft, a fastspeed gear train, a slow Vnism, relatively speed gear train, each gear train including a worm wheel coaxial with said, shaft, and friction clutches one individual to each terminal gear for connecting said worm wheel in driving relation with said shaft. Y

31.` In a mining machine feeding mechanism, relatively rotatable feeding members disposed with their axes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a separate and distinct plural speed transmission mechanism for each member, each transmission mechanism including al longitudinally extending shaft, a fast speed gear train, a slow speed gear train, each gear train including a worm wheel coaxial with said shaft, and worms rotating on parallel axes and meshing with said Worm wheels respectively.L

32. In a mining Amachine feeding mecharotatable feed operating members disposed with their axes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a separate and distinct plural speed transmission mechanism for each member, eachy transmission mechanism including a longitudinally extending shaft, a fast speed gear train, a slow speed gear train, each gear train including a Worm Wheel coaxial with said shaft, and Worms rotating on parallel vertically extending axes and meshingV with said worm wheels respectively.

33. In a mining machine feeding mechanism, relatively rotatable feeding members each adapted to cooperate directly with ilexible feedingmeans, and' motor operated devices for driving saidmembers either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed includingl a separate and distinct plural speed transmission mechanism for each member, each transmission mechanism including a longitudinally extending shaft, a fast speed gear train, and a slow speed gear train, each gear trainincluding a terminal gear coaxial with said shaft, and transversely extending shafting driven through said gear trains and operatively connected to said members..

34. In a mining machine feeding mechanism, relatively rotatable feeding members each adaptedto cooperate directly with flexible feeding means, and motoroperateddevices for driving said members either sepa- -eachjmemben each vtransmission mechanism rately or-` 'simultaneously in -ra direction tto `draw inf Ytheir,y respectiveflexible feeding means `at relatively high speed oratrelatively low; speed-.including a' separate. andL distinct plural=y speed transmission mechanism i for including a longitudinally extending shaft, a

Vfast speed gear; train, yand .a 'slow speed gear train, eachgear train incliding a worm wheel coaxial with said shaft, and transversely ex-- tending shafting driven through said gear trains and operatively connected to said members.r

35. In a mining machine feeding mechanism, relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated devvices for driving said members either separately or simultaneously in a direction to ldraw in their respective flexible feeding@ means at relatively high speed or at relatively low speed including a separate and distinct plural speed transmission mechanism for each member, each transmission mechanism including a longitudinally extending shaft, afast speed gear. train, a slow speed gear train, each gear train including a worm Wheel coaxial with said shaft, and friction clutches one individual to each terminal gear for conmeeting Said WOlmiWheel in driving relation-" with said shaft, and transversely extending shafting driven through said gear trains and operatively connected to said members.

36. In a mining machine feeding mechanism, relatively rotatable feeding members: each adapted to cooperate ble feeding means, and motor operated devices for driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a separate and distinct plural speed transmission mechanism for each member, each transmission mechanism including a longitudinally extending shaft, a

directly with e'xi- 100 fast speed gear tram, a slow speed gear train, l

each gear train including aworm wheel coaxial With said shaft, and worms rotating on parallel axes and meshing with said worm. wheels respectively, and transversely extend-,ifv ing shafting driven through said and operatively connected to said members.

37. In a mining machine feeding mechanism, relatively rotatable feed operating members each adapted to cooperate directly with flexible feeding means, and motor operated devicesfor driving said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a separate and distinct plural speed transmission mechanism for n each member, each transmission mechanism including a longitudinally extending shaft, a fast speed gear train, a slow speed gear gear trains train, each gear train including a Worm wheel 1 coaxial with said shaft, and worms rotating 5 and* transversely eXte :through said' gear trai on parallel vertically extending axes and Y meshing with said worm Wheels respectively, nding shafting driven ns and operatively'connested to said members'.

In testimony whereof I affix my signature.

MORRIS P. HOLMES.

vso

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