US1815873A - Mining machine - Google Patents

Description

'M. P. HOLMES MINING MACHINE Filed mien 29." 1927 July 21, 1931;

. 6 Sheets-Sheet l July 21 1931. p, M S 1,815,873

MINING MACHINE Filed'M'ar ch 29. 1927 e Sheets-Sheet '2 J3 549- d1 23 111 Z6 2725 x14 60 II z g 6 6 M 5 Q15 3 I11 5 m L15 4 7 M43:

45 L 1.21:5" I 9 v 6 E A%W7 Z 36 as 2 1% 52 a9 27 J& 26 .1. u

' 1931. MQP. HOLMES I 1,315,373

' MINING MACHINE Filed March 29. 1927 6 shets -sheet 3 July 21., 1931.- M. P. HOLMES 1,815,873

MINING MACHINE Filed March 29.1927 6 Sheets-Sheet 4 13 9 L19 Z06 Z.

4 r I I. 2M L is M. P. HOLMES 7,815,873

MINING MACHINE Filed March 29. 1927 6 Sheets-Sheet 6 J ly' 21,- 1931.

. Pa tentecl July 21:,

{STATES m OFFICE Moms rinonmns or cLA EMoN'r, NEW HAMPSHIRE, ASSIGNOB TO SULLIVAN C IN COMPANY, AYCORPVORATION or MASSACHUSETTS Murine MAGHINE Application filed March 29., 1927. "Serial No. 179,357.

This invention relates to mining machines and more part1cularly, but not exclusively, to.

coal miningimachine's of thecontinuou'scutter flexibly fed type adapted to cut a horizontal kerf in the coal face. Anobjectxof this invention isto provide an improved-coal mining machinelof the continuous cutter fiexibly fedflqow vein type having lmproved feeding means especially adapted to use with either the longwall or room an'd pillar systemsof mining. Another obj'ectiof this inventionis to provide an im-' PIOVgd room and pillar mining machine of extremelyloiv and compact character espe-* s ciallyadapted to use mineshaving relative Qly narrow veins ofcoal'; Stlll another object [of this invention-isto provide an'improved mining machine having 'an improved cutting mechamsm and an'improvcd feedlng mecha- '20 nism, saidmechanisms being'driven'fromthe opposite ends of the driving motor. I A furtherobject of this; invention is to provide an improved mining 7 machine of the .lo'ngwall' type'having apower driven feedoperating' member :anda power. driven controlling or take-up member. Yet another object of this" invention isto provide an-improvedcfoal mining machine of theinvertible'type adapted to operate selectively eitheras'an undercutter or as an overcutter; provide coal mining machine ofthe com bined l'ongwall'androom and pillar low vein type having an improved arrangement of controlling and feeding parts whereby the movement of the machineduringcuttingin accordancewith either system of mining is greatly facilitated. Another object is to provide an improved andsimplified plural speed 'transmlsslon" mechanism between the motor 40 another object of this invention isto provide an improved controlling means for the cutter v chain drive which: has associated therewith .-imp'roved lockingmeans for the pivoted. cut.

ter bar. improved Qmining fmachine having, an improvedcompact general arrangement'of parts;

Thesei and other objects and [advantages of this invention'will,however, hereinafter more 5 an appear.

type having aplurality of coaxially arranged power driven rope Winding drums one of axes vertical and arranged ina novellocation of coaxial Windingdrums having. their axes vertical and disposed at the end ofthe ma- A further object is to I and the feed and 'controllingdrumsJ Still A further object is to provide an In a preferred form of the invention the objects stated areachieved by providing a coal mining machine of the combined longwall and room and pillar continuous cutter low vein which is for feeding the machine relative to the coal face Whilethe other is operative for controllingthe position of the machine rel ative to'the coal face, these drums having their m and driven from thedriving motor in an improved manner. More specifically, a preferred embodiment of the invention may comprisean'invertible machine frame slidable on either of two opposed plane surfaceson the mine floor and preferably formed of a feed section, a central motor section and a cutter section,the latter having a projecting cutter bar which is pivotally mounted thereon for horizontal'swinging movement and adapted to be locked in a plurality of operative positions relative, to the frame. The feeding mechanism preferably comprises a plurality" chine frame remote'from the cutting mecha-' nism and these drums are driven at either a fast or a slow speed and at any desired variants of such speeds under the control ofa plurality of friction clutches. Flexible feed cables may be attached to and wound upon the feed drums; In "the accompanying drawings in which an illustrative embodiment of the invention is shown, a 7

Fig. 1 is a plan view'of the improved mining machine, the cutter barand feed cables beingshown in a plurality of operative positions. g

Fig.2 is a side elevational view of the machine shown in Fig. 1. I

Fig. 3 is a longitudinally extending central i vertical sectional view taken on line 3-3 of F' g."1' and illustrating the improved cutting mechanism and cutter bar loc Fig.4 is alongitudi ally extending vertical i sectional view taken on line 4.-4 of Fig. 1 and 1 illustrating the improved feedingmechanism. I r Fig..5is a detail sectional view illustrating 1'00 7 parallel plane surfaces. 3; and.

the cutter chain clutch and the improved har locking means associated therewith, the con trolling parts being shown in a plurality of operative positions.

F ig. 6 is a detail view of the cutter chain controlling clutchand bar loclr shown in F ig. 5.. i 1

Fig. 7 is a transversehorizontal detail sectional viewtalgen substantially on line 7( of Fi 4'. V

F 1g. '8 is a transverse horizontal sectional View illustrating the feed Fig. 9 is a transverse vertical sectional View taken substantially on line 9 9 of Figs. 1 and 8a; v

10. is. an. end; elevatio-nal' View of the end; oi theslmpron'ed; machine. g. 111 is a detail view Illustrating apertiorr-off thecontrolling clutch for the teed:

ing dnums.

V igi 12 ,is ai tramsverse'vertical. sectional View: substantially on; line 1 212 of Fig. 13' is a detail sectional View taken on linel3' l 3 ofFigi 8;. lilig 114iis a tragmentary plan View part-ia-lly broken: away in section to facilitate illustration and: illiistrating details of the feedingmechanismi 1 151s. a diagrammatic VIGW illustrating the improved; machine when. cuttingin accordance. with the room andzpillar system of: mining, the. machine being shown cutting, from. mght-toi'leiit;

Figa1i6 is a. diagrammaticview illustrating the machine when: cutting in accordance with mining.

the l ongw-aill. system. of

, Fig. is. diagrammatic view illustrating themachi'ne mounted on. a truck and operate ing: as an. entry cutter.

- hi1 tlnisiiliistrative embodiment ot-the inveniiioni thereisshown mining machine this 1 ignatedi as anentirety byfthe reference character-Jiand' whiclnis'herein: ot the flexibly fed. continuous cuter type adaptedto cut either according tothe: longWa-ll or the room The machine present and pillar systems of mining. 1 comprises an invertible. frame 2:

supported: during cutting, thereby enable the-machine to; operate either as an undercut.-

terzfor-an overcutter].Pivotally mounted at i one end of the machine frame 2 on a vertical a-xis: as. at: 5 is. an elongated plane. horizontal cutter bar 6 about the. margin. of whicha cutterrbit carrying critter chain. 7- is. adapted ten tabs-circulated; The cutter bar 6. is adapted to he lock'ed in diiferentpositiionswith respect tothe 'inachineifzrameflhe cutter bar being adapted to; held either. in a position exor: it ang l este the at either s dethereof. .eedingrot' the machine may be employed, gearing, partsbelng' shown in plan.

ably formed integral with by the cutter 4 upon.- which the machine is adapted to be selectiye'l-y v A I top cover: plate :n longitudinally oi? thema'chine. frameaccomplished by either of two flexible feeding elements, here in cables or ropes 8 and 9, each wound upon a feed operating member, herein in the form of coaxially arranged winding drums having their axes vertical and disposed at the end of-the machine frame opposite from the cutter bar. 6, the drums being. respectively designated and 11.

During longwall cutting the upper feed drum ll'and' the feed cable 9 may preferably be while duringrooni and pillar cutting. the. feed drum l1 and the feedcable 9 may he used to efl'ect feet, while the other feed drum 10 and feed cable 8 will be used to centrol the angular position of the machine relative toth'e. coal. face. 7

Referring more particularly to the ma-v chine, it will be noted that thesame herein comprises three sections, i; a motor section 12 which herein comprisesamotor cashig and bottom platesnpporting the motor casingin elevated. positiomaieed section. 13 and a cut; ter carrying section 14;, the feedand cutter sections being herein. disposed at opposite ends 01"- the motor section and rigidly connected to the; latter in such. manner as to term a; rigid; and very low compact frame slidab-le on the; mine floor. It. will heparticulnrly neted: that hereinthe upper and lower surfaces 4. and; 3; of they frame sections areoreferably disposed in common-planes in sucn manner as to unite: to. form a singleshoe'adaptedto permit free movement of the machinethereon overthemlne floor.

'll'nyspecifically describing, the improved cutting. mechanism" itwill' herei'nbe noted. that housed within. the motor section; 12 is an elect ic motor, herein preferably of the reversible, type: having its armature. shaft 15 horizontally disposed and extending long.- itudinallyot the machine. Fixed by a key and screw connection 16 to one end of: the armature shaft15 (isee'Fig. V pinion-18 which meshes with a horizontally disposed-larger bevel gear. 19 herein prefer a vertically disposed hollow shaft' 20, the latter being journaled in ball bearings 21' frame As shown, fixed to: and'rotatable' with the bevel gear which. meshes witha larger spur gear 23' havinga cylindrical. hub portion 24' journaled' on ball bearings. 25 herein preferably surrounding and supported by a. Vere tical. stud 26; As shown 1n 26" isthread'edly connected'at its opposite end as at 237 to detachabl cap members' 28 and 29; respectivelythese caps: being secured to, the machine name by bolts 30; The cap 28i's hereinfcarri'ed' by a: detachable ried by detachable bottom will herein. be; noted thatv the caps 28, 29

and plates 31, 32 may bedetachedi the,

is V. a bevel" 19: is a spur pinion 22;

Fig. 3 the stud:

31, While, the cap 29 is. car

plate 32- lit suitably carried-v section 14. of the machine machine frame topermiti'axia'l withdrawal of 'the vertical stud 26 and gear 23from theframe thereby facilitating assembly and dismantling: of the machine. As illustrated,

the cylindrical sleeveportion "of the gear 7 23 is-connected by a semi-perman-ent clutch 33 to a spur gear-'34 having ahubportion surrounding and rotatably'mounted on the vertical stud 26. Rotatablyfmounted on i 5 the, hub of'the spur gear 34and alined therewith is'a spur gear 35 connected, as by a 1 semi-permanent clutch 36 to the cyhndrical hub'of a cutter chain; drive'sprocket 37. As

7 shown in Fig. 3 the 'cuttenjchain drive sprocket'3'7 is rotatably mounted on ball bearings '38 surrounding and supported by the vertical stud26; Thehub portion of the gear 34 is interposed' between the lower bearing for the' gea'ri 23 and the upper bearing-38 forthe sprocket 37. The'bearings 38 and the sprocket 37 are" maintained in operative, position by means of a cup shaped member orstep bearing 39 held in position by'the bottom plate and to which -;'the bolts are threadedly connected. The Vertical stud 26 is suitably pinned to the cap member 28 and the; step bearing 39 to prevent rotation of the stud. Cooperating with thefmember 39 isa depending annular portion'39 herein formed 'intiegralwith the cut ter frame section 14. ,Disposed on opposite sides or the 'cutter chain sprocket 37 and carried respectively by the cup-shaped member 39 and the annular portion 39 are oil 'retainingrings 40, these rings preventing leakage of oil from the interior of the ma- 'ch'ine and also preventing the'entry of dirt or'other foreign substances to'the internal mechanism. Formed in the frame sectlon 14 is, a vertical bore'41'within which is vertically reciprocable a "cylindrical clutch shipper member 42 connected at 43 to an internal gear clutch memberx44 having teeth" which are adaptedlto cooperate with the "1 teeth; otthe spur gears 34 and as will later be pointed out. Thecutter bar 6 is mounted for swin'ging'movement on bearing sleeves 45 and 46, the latter being supported on the member 39, while the former surroundsfla cylindricalfportion on the ma chine frame." Secured by bolts'47 to the? cutter bar 6 is a bearing andlocking' ring 48' herein preferably composed of two parts to facilitate assembly; The locking ring 48 is provided with'ia recess 49 to which one of the feed cables is connectible toeffect swinging of the cutter bar. Also formed in the locking ring 48 is a plurality 'herein three, of locking recesses or grooves 50. The

39? looking ring 48 is herein rotatably mounted on-a two-part'bearin'g' sleeve 51 supported ona cylindrical flange 52 herein formed'in tegralfwith the machine frame, the bearing sleevex45 valsoengaging the'fiange 52. The 5' improved operating mechanism for the cut 18 which drives the cutter chain (see Figs;

ter chain clutch 44 and the-improved bar locking means associated therewith specifically comprises (see also Figs. 5 and 6) upstanding lugs 53 herein formed integral with the shipper ring 42. The lugs 53 carry inwardly projecting pins 54 which cooperate wvith the slottedends 55 of a shipper means 56 having its side arms pivotally mounted at I .57 on horizontal shafts 58' carried by dc 68 to a rotatable locking member 69 also supported by the shaft 65. The lockingm'em-- ber 69 is adapted to cooperate with the reg cesses or notchesfiOiormed in the locking ring 48 secured to the'cutter bar 6; The .1

sleeves67 are rotatably mounted in bearings 70 herein formed integral with the frame section 14. Clutched at 71 to the outer ends of the sleeves 64 are handles 72 disposed at opposite sides of the'machine. The handles 72 are adapted to be held in different adjusted positions by means of adjustable locking pins 7 3 carried by the handles 72 and cooperating with suitable apertures 74 formed in the sides of the machine frame. It will accordingly be evident that the operator may grasp one of the handles-72 and rotate the same so that the locking member 69 may be moved relative to one of the notches 50 and also the clutch member 44 moved axially. It will be understood that one pin 73 isinactive when the other is in use. Assumethe handle 72 is in the posia 'tion showninfull lines in Fig. 5. Upon initial counterclockwise movement of the handle '72 ;(viz. to the position of Fig. 3) the clutch member 44 is moved to. connect the gears or clutch members 34 and 35, con sequently connecting the cutter chain sprocket in drivingrelation with the motor. Upon further movement of the handle 7 2 (to the dotted position of Fig. 5) the locking member 69leaves the locking recess 50. Upon still further movement of the handle 72 the clutch 44 is moved again to its disengaged posltion while the locking member 69 remains in releasingrelation. It is therefore obvious that the single handle 72 may be operated to control both the'cutter bar lock andithe driving of the cutter chain. i r

As shown in the drawings, theimproved I I feeding mechanlsm specifically comprises a spur pinion 75 fixed to the end. of the armature shaft 15 opposite from the bevel pinion 4,81, 9; and 12). The motor pinion 7 5 meshes with a spuridler gear 76 keyed as at 77.,

to a horizontal shaft 78 extending longitudinally of the machine and disposed parallel with the motor shaft 15. As' shown in keyed as at 81 to a horizontal shaft, 82disposed in the samehorizontal plane withthe shafts and 78. As illustrated, the shaft 82 is journaled at its. opposite ends in ball bearings 83 suitably carried by the feed 1 frame section. 'Theshaft 82 has preferably formed integral therewith a bevel pinion 84 which meshes with a bevel gear 85 keyed at 86 to a horizontal shaft 87 arranged transversely of the machine "in advance of theshafts 15, 7 8 and 82. The shaft 87 has secured thereto at its inner end by a key 88 a spur gear 89, the hub of the latter being internally bored at 90 to receive a ball bearing 91. The bearing 91 is supported by a projecting stud or dowel 92 suitably secured by screws 93 within the feed frame section. It will also be observed that the bevel gear 85 is internally bored at 94 to receive a ball bearing 95, the latter being. likewise supported by a projecting stud or dowel 96 secured by screws 97.to the side ofthe frame section 13'. 7

Referring more particularly to F ig. 9 it ,will be noted that the spur gear 89 meshes 5 with a spur gear 98 keyed at 99 to a shaft I 100 disposed above and parallel with the I ratio to obtain different predetermined feedshaft 87 The gears 89 and 98 are changed speed gears and it is obvious that these gears may readily be removed from their respective shafts and replaced by gears of different tooth ing speeds. As shown, the inner end of the shaft 100 is journaled through a ball bear ing 101 carried within a bore 102 formed within the hub ofthe gear 98. The opposite end of the shaft 100 is journaled'in a ball bearing 103 suitably carried within a detachable bearing bracket 104. The bearing 101 and bracket 104 are supported on dowel pins 105, 106, respectively, similar to the dowel .pins 92 and 96 heretofore described. It

will herein be observed-that by providing the detachable dowel pins'92, 96, 105 and 106 it is possible to remove the shafts 87'and 100 from 5' their supports with facility, these dowel pins also providing an exceedingly stable bearing and supporting structure for the shafts. Moreover, it will be noted that upon removal of the top plate and dowel pins the shafts may be lifted bodily from the machine with facility. The shafts 87 and 100- have respectively rigidly secured thereto intermediate their ends worms 107 and 108, the former having oppositely inclined teeth of steeper lead than the teeth of the latter. The worms 7 10 and 11 in 107 and 108 rotate in opposite directions. As.

clearly shown in Fig. 12 the worms 107 and 108 mesh respectively with worm gears 109 and 110, the latter being coaxially arranged and disposed on a vertical axis. The worm gears 109 and 110 each have hubportions respectively journaled on ball bearings 111 and 112 suitably carried by the machine frame. As shown, the hub portions of the gears 109, 110 each carry spaced alined ball bearings 113 within which theopposite ends of a vertically disposed shaft 114 are journaled. The shaft 114 has herein preferably formed integral therewith intermediate its ends an elongated spur pinion115 which meshes with a spur gear 116 connectible, in a manner to be later described, to a Vertically disposed shaft 117 disposed in the longitudinal center of the machine and journaled at its upper end in ballbearings 118 positioned by a detachable cover plate 119. The shaft 117 has secured thereto by a key 120 a spur pinion 121 having a hub portion journaled of the ball bearing 118 and beingthreaded to the pinion at its lower end. The spur pinion 121 is adapted to drivethe feed drums V a novel -manner to be later described.

Improved mechanism is provided for alternatively frictionally connecting the fast and slow speed worm gears 109, 110 to the shaft 114 and this mechanism specifically comprises a pivoted shipper yoke 123 (see Figs. 8 and 12) carrying at its inner end suitable rollers 124 which are adapted to engage the plane surfaces of axially movable cylindrical clutch applying members or pressure plates 125 and 126. The members 125 and 126 have projecting fingers extending through apertures in spider members 127 and 128 positioned within the gears 109 and 110, respectively,'by means of radially expansible split rings 129. The,

rings 129 are seated within annular grooves 130 formed within the worm gears; As clearly shown in Fig. 12 the members 127 and 128v are each provided with internal gear teeth 131 which are interlocked with the teeth at the ends of the pinion 115. Furthermore, each of the members 127, 128 carries a series of clutch discs 132 which are interleaved with a corresponding series of clutch discs 133 carried by the hub of the worm gears 109 and 110. In accordance with the illustrative form ofthe inventionrthe outer 'end of the shipper yoke 123 is provided with a bifurcated portion 134 straddling an enlarged portion, 135 of a vertically disposed rod :136

threadedly connected at its lower end within 'themachine frame, the enlarged portion 135 having-flattened sides which engage the inner sidesof the bifurcated portion 134. The bi turcated portion134 provided with arcuate orjj rounded ends which engage upper and lower transverse yokes .137 and 138, respectively, engaging the'upper and lower surfaces ofthc-enlarged portion135 of the ma. The

theretofbolts 139 which engage coiled springs 140 carried within recesses141 formed in the upper yoke'137-.. It willthus be evident that thebiturcated member 134 and the resiliently connected yoke 137,138 form a 'yieldabl'e piv otal mounting for the shipper yoke 123, the coiled springs 140 being adapted to yield; upon overloadot either of the controlling clutches 13 2, 133. Improved meanslis providedffor swinging the shipperyoke 123 about'its pivot comprising a" crank :pinfor eccentric 142 (see 8)= formed integral with a rotatable rod 143 j ournaled at its opposite ends within bearings suitably carried by the frame section 13.

Secured-to the" outer end of the rod 143 by a key'144'is an operating handle 145 conveniently located at the end of the machine; Ro-

tation of the rod 143 is limited by a pin and slot connection 146. It will accordingly be evident I that rotation of the handle 145 and consequently the eccentric 142 effects swing ing'movement of the shipper yoke 123and consequently one or the other of thecontrollingclutches 132, 133 connecting the worm gears'109, 110 to the shaft 114 is applied, causingrotationof the latter at either a fast speed or at a slow speed, in the same direction. l The crankpinor eccentric 142 locks the shipper Y I yoke 123 in either its raised or lowered posi tionrwhenthe centerfof the eccentric passes thevertical center of the rod 136; a i

g Improved clutch i mechanism, is provided for connectingthe spur gear 116gto the shaft 117andthis clutch mechanism as shownin'the drawings specifically comprises external clutch teeth 147 formed on a flanged portion 148 of the shaft 117 As shown in'Figs. 4 and 12, internal clutch teeth-149 are formed ona clutch ring 150 movably mounted in a recess formed'within the gear 116 and these clutchteeth engage clutch teeth 151 formed on the gear 116. The clutch teeth 149 are adapted to cooperate with the clutch teeth 1'47 ashereinafter described. It will herein be observedthat the clutch ring 150 is re- 'tained within the recess: in the gear 116 by meansof a radially expansible split ring 152 disposed within fan 1 internal V groove 153 I .formed within the gear116. The retaining ring-152 presents a projecting shoulder with which a radial flange 154 on the clutch ring 150isadapted normally yieldably maintained against the I retaining rlng 152' by means of coiled springs [155. -As shown in Figs. 4, 8, 11and'12se cured within the frame section 13 by screws 156 which also holdithe cap member 119 in positio'nfis anannnlar member 157 centrally lower yoke 138 has threadedly connected.

ends at 173 to the machine frame. 172 is provided with a grasping portion 17 4 'in an improved manner. particularly to Fig. 4 it will be observed that I to engage. The clutch ring is i cut away at 158 to receive thehub of the spur gear 116 and the shaft 117. -Furthermore, the sideof the member 157 is cut away as at 159 to clear the upper .worm gear 110. The member 157is provided with a depending flanged portion 160 having formed therein inclined cam slots 161 (see Fig. 11)-With which radiallyjlocated pins'162 carried by'a grotatable shipper ring 163 cooperate, the

shipper ringcarrying a series of rollers 164 which engage the upper planesurface of'the clutch ring150 a's clearly shown in Fig. 12. The shipper ring163 is provided with laterally projecting lugs or teeth 1 65 wi th V 7 which a tooth or lug 166 formed on a horizontal rod 167-cooperates; The rod 167 isaX- a ia'l'ly movable transversely of the machine and guided at its opposite ends in bores168 formed in the machine 'frame.

meansof a pin and slot connection 169. *As illustrated, the rod 167 has threadedly connected thereto an adjustable eye'member 170 which is pivotally connected (see also Fig. Q 10) as at 171 to a lever 17 2, the latter in turn being 'pivotally connected intermediate its The lever disposed adj acent the handle, 145; Thus it will be evident that when the operator grasps the portlon 174 and swings the lever'17 2 about its pivot, the rod 167 is moved axiallyandthe clutch'ring 163 is consequently rotated? 5R0; tation of the clutch ring 163 causes the pins and interlocking the clutch teeth 149 with teeth 147 as wellas, 151, therebyconnecting the gear 116 to the shaft 117 As pointed out .above the5pinioni121 is adapted to drive the feed drums 10 and 11 Referring more the pinion 121 meshes with an internal gear 176 formed integral with the upper feed drum 11. The hub 177 of the feed drum 11 is rotatably mounted on spaced alined ball bearings 178 supported by a central upstanding sleeve portion-179 formed integral with the lowerfeed drum "10. The hub portion 179 is rotatably mounted by ball bearings 180 suitably carried by the frame section 13, the lower bearing' 180 being carried by, a detachable bottom plate 181, ,The' bottom plate 181 is rigidly secured to'the n me section 13 by suitable means including a verticalstud 182, the latterpassing coaxially 7 I 1 through the hub 179. As shown in" Fig. 4',

interposed between the hub 177 of the'd rum 11 and the hub 179 of the drum 10 is an oil ring 183, while interposed between retaining I the lower drum lO iand the bottom plate 181 is 51111112111 oil retaining ring 184. Tn this 'iastaheeguie but at the simian-has Rotative movement of the rod'167 is p t d b -"r 162 carried thereby to move downwardly F within the inclined cam slots 161 consequent jly'moving the clutchring 150.downwardly projecting lfin'gers- 18-7 ticularly; to Fig; "7 it will be observed that the fingers 187 have. inclined surfaces 188 which cooperate with corresponding inclined Ellifaces 189 formed on clutch or brake shoes 190..1' Each of thebrake shoes 190 carries a strip ofbraking material 191v interposed between the; outersurfaces of the brake shoes and thesmooth inner periphery 192 of the lower feed drum 10. Thebrake shoes 190 eachihavef-ormedronthe inner surface thereof an arcuate eccentric or cam surface 193 With whichapressureroll 194 cooperates, the rolls; being rotatably mounted on: vertical pin-sc i95-carried by a control wheel 196rrotat-- ably mounted onthehub of the driver memher 186 and interposed between the feed drums; 10; and 11. Thus it will be seen that when; the control wheel 196 is grasped by the operator-and manuallyrotated the pressure; rolls l94-move along the eccentric surfaces: 193 onthe brake shoes, forcing the latter outwardly, thereby causing the lower feed drum! 10 to be frictionally connected to the. upper feed-drum 11- for'rotation therewith. It will also be obvious'that upon suit able. release of the control wheel the lower brake shoes, forcing the latter upper-feed drum 11 at o fthe latter.

feed drum 10 may be disconnected from the will during rotation When the driver member 186 isirotated with the drum 10 under load the inclined surfaces 188. on the fingers 187 act against the. inclined surfaces 189.- of the outwardly therebyapplying the brakeandi supplementing; the action of the pressure rolls 194. It

will further be: obvious that the feed drums l0 and 11 may be rotatedtogether or remain idle while the gear 121 continuously'rotates by suitable application of the clutch 147 149 and 151. Moreover, when the clutch 147, 149, 151- is connected and upon'a'pplication of the clutches 1'32, 133 controlling connection of the'worm gears 109 and 110 to the shaft 114, the feed drums 10, 11 may be rotated at a relatively slow speed or at a relatively high sp,eed,'the drums rotating in thesame directionatboih speeds. As-shown in Fig. 1, in order to permit cutting according to the room and pillar method a guide sheave or swing arm 200 is provided having a mounting 201 pivotall-ycarried by a bracket 202 whereby it'may be secured to the machine ra-m'e by alsuitable dowel 203 (see Fig. 1) anda' cooperating bolt 204 adj acentthe cutter barend of the machine and this. guide sheave can beshifted from side'toside of the machine frame, depending upon the direction of cut desired. Referring to Figs. 4, 8 and 10 it will-beobse'rvedthat the outer end ofthe feed frame section 13is cut away as at 205to permit thegear 116 to mesh with atruck driving gear of any suitable form,

Referring: more par- 'right angles to of the machine. The motor housed with the frame section 12 is adapted to becontrolled by any suitable controlling mechanismincluding a controlling handle 208 convenient.- ly located opposite the feed control: handle 145.

In the operation of the improved mining machine when operating in accordance with the longwall system of mining thefeed cable 9 may be extended along the side of the machine'as indicated by dotted linesin Fig. 1

and attached in a suitable manner to a twopart hook connected to the recess 49 in the locking ring 48. The operator then grasps the handle'72 and releases, the locking mem ber 69 from the locking 34, and 44 being connected at that'time. The operator then manipulates the-handle 145 applying the slow speed clutch 132, 133 and connecting the slowspeed worm gear 110 to the shaft 114'. The clutch 147, 149, 151 is then connected and consequently the feed drum 11 is rotated, winding'in the feed cable'9 and swinging the cutter bar 6 about its pivot 5'. l/V'hen the cutter bar assumes a position: at

the machine frame as indicated by dotted lines in Fig. l the operator again manipulates the handle 7 2, rotating the locking member 69 *and movingthe latter within .one'of the locking grooves -rigidly lockingthe cutter bar to the machine frame. Thefeed cable 9and the hook are then detached from the locking ring 48 and the cable is then extended aroundone of' the'guide sheaves'206, to a point in advance of the machine frame, the free end of this cable being anchored in a suitable manner. The hand wheel 145 is then appropriately manipulated by the operator aud t-he clutch: 132,133 applied, thereby causing the feed drum 11 to Wind in the cable and the machine is fed at locked to the latter and upon.reversal of. the

motor, reversal of the cutter bits intheirrespective links, and the feed cables being wound reverselyon.

groove 50, the clutch be swung angularlly rela their respectivedrums ly-d'escribed one form of which; my invention may assume-inpractice, it will be understood that this form of the same is shown for purposes: of illustration and that the endfof: said motor, and feeding mechanism driven from theopposite end of said motor fon'feeding themachine bodily laterally over the mine bottom including coaxially arranged relatively rotatable feed operating members each. adapted to be driven by said motor and cooperating.flexiblefeeding means including advance and] receding flexible feeding portions extending in opposite directions from'opposite ends of said frame and cooperating-with said" feedoperating members respectively. v I a 2.; Ina minin tmachine' a horizontal motor n e b I 7 e I having: its ax s extending longitudinally of the machin'e ,cuttin tmechanlsm driven from one endiof' saidmotor, an'dfeeding mechanism driven from the opposite-end of said motor including:coaxially'anranged'relatively rotatable: feed operating member-s disposed on a vertical axis and each adaptedto cooperate with flexible feeding means.

3. In a: mining machine, a horizontal 1110- 'tor having its axis extending, longitudinally of the machine, cuttingm-echanisin driven from one end of said, motor including a horizontal .swingable cutter bar, and feeding mechanismdriven from the opposite end of fsaidmotor'. including coaxially arranged relatively rotatable feed operating members disposed-on a vertical axis and each adapted. to cooperate with flexible feeding means.

4:. In a mining'machine, a machine frame presenting parallel plane surfaces upon which the machine is adapted to be selectively supported during cutting, a horizontal motor in c said: frame-having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor, and feeding me'chanism driven' from thejoppositeend of said motorincluding coaxially arranged relatively rotatable feedoperating members each adaptedto cooperate with flexible feed operativeto feed'the machine when supported on either surface of said frame.

5'1" Ina mining machine, a machine frame 7 presenting parallel plane surfaces upon which the-machine: isiadapted to be selectively supported during'cutting, a horizontal motor in said: frame: having its axis? extending longitudinally oftlie machine, cuttings mechanism ing means and disposed on a vertical axis and miners relatively rotatable feed operating members each adapted to cooperate with flexible feed- ,ing means and disposed on a verticali axis and operative tofeed'the machine when supported oneither surface of said frame.

6. In a mining machine, a machine frame slidable on its bottom on the mine bottom and carrying ahorizontal motor having its axis extending longitudinally of the machine, cutting mechanism driven from one end of said motor, and? feeding mechanism driven from the opposite endof said motor for feeding the machine bodily laterally over the mine bottomii'ncluding a pair of relatively rotatable feed operating members, one of said feed operating members being connectible to the other for rotation therewith and cooperating flexible feedingmeans including advance and receding; flexible feeding portions extending in opposite directions from opposite ends of crating members.

8. Ina mining'machine, "a horizontal? mo.-

tor having, its axis extending longitudinally of the machine, cutting mechanism driven from one endiofsaid motor, and feeding mechanism driven from the opposite end of said motor including, coaxially arranged: relatively rotatable feed operating members; dis-posed on a vertical axis and eachiadaptedito coop.- erate with flexible feeding means,,plural speed driving gearing for rotatingone of said feed" operating members at a plurality of speeds, and. means for. connecting the other feed operating member tosaidpower driven feed operating member for rotation therewith; I

9. In a mining machine,.a motor,. and feeding mechanism driven by said motor including a pair of'relatively rotatable feed operaing memberseachadapted to cooperate with flexible feeding means, plural speed dniving gearing for rotationg one of said members at k '20. In a imachine, a motor, an

feedingmeansi driven thereby including coax arranged relatively rotatable freed operat r g-members each rotatable 'ona vertical axisiand adapted to cooperate with flexible;

feeding means, and driving connections between said motor and said feed operating members comprising worms rotatable at ditferenlt, speeds on transversely extending horizontal axes, and Worm gears constantly meshin'gtherewith, and driven thereby at different speedsaiidselectively operable as driving membersjfor said feed operating members.

' 21 In a mining machine, a motor, and feeding mean-s driven'tliereby inclnding coa-xially arranged relatively rotatable feed operating 7 members, each adapted to. cooperate with flexible feeding .rneans. d v

ween said motor and said feed operating ineniberscoinprising orms rotatable at dit ferentspeeds on transversely extending horizontal'aXca-worm gears constantly meshing therewith andselectively operable as driving members for said feed operating members,

speed controlling clutches arranged coaxjferent vpeeds on transversely extending hori- ZQIllJZtl'fiXQS, worm gears constantly meshing .therewlithyand slectively operable as driving members for said feed operating members, and speed controlling clutches arranged coaxially with said Worm gears.

23. In a mining .machine, a motor, feeding means driven thereby including coaxially varranged relatively rotatable feed operating members each adapted to. icoeperate with flexiblefeedin'g means, and driving connec ti'ons between said motor and said feed operating nenibersicomprising Worms rotatable on transversely extending horizontal axes,

Worm gears. constantly V meshing therewith, a

spur gear arranged ,comrially with said worm gears and connected "in driving relation with said feed. operating members, and meansior alternativel y connecting said worm gearsin dr ving relat1on with said spin: gear.

'24:. In machine, a motor, feeding I means. driven thereby inclnd-ing coaxiali iy are adapted tolcooperate with fiex'ible'feeding ineans and driving'connectlons between said I motor and sa 'dvfeed operating memberscoinranged relatively rotatable feed operating members each rotatable on a vertical axis,;-and

prising Worms rotatable on transversely extend ng. horizontal axes, wormgears constant- 1y meshing therewith, a spur gem arranget coa-xially with said worm .gears landsconiae vin connections nected in driving relation; with said ,lfeed-op eratingmcmbers, and means'for alternat vely connecting said worm gears n driving relation withsaid spur gear. V i

25. In a miningtmachin a horizontal mo;

torh'aving its axis extending longitudinally of the machine andfeedin means driven thereby i n cliiding plurality of relatively .rotatable feed operating members each adapted to cooperate with ilexibleieeding means, and

between said motor and said feed operating members. coni pri ing worms-rotatabletransversely extending horizontal axes, worm gears meshing there-with, a spur gear arrange-d coaxi-ally with. said worm gears, a spur gear connected in driving relation with ens of said teed eperating members and mesh ing with said first mentioned spur gear, means for alternatively connecting said Worm gears relation with saidfirst men tioned spirit-gear, andmeans for connecting said teed operating members together i301 tation. I i

1 i ing machine,amotor,and feeding means driven thereby including a plurality of ceaxially arranged relatively rotatable feedeperating members each adapted to: co-

operate-with flexiblefeeding means, and driving connections between said-motor and said teed operatingmembers comprising worms rotatable on transversely-extending horizontal axes, worm gearsjmeshing therewith, a 1'1" gear arranged coaxially-with said Worm gears,- a spnrggear connected in driving relation with one of said teed ope-rating members meshing withsai; firstymentioned spur gear, means for alternatively connecting said is gearsi-n driving relation with said first .ible feeding means, and driving connections mentioned spnr gear, and means for connect- 7 iii-g: said feed eperating'members-together for simultaneous rotation. r I

28. In a nnning machine, a motor, and

teeding naeans driven thereby including a p ltn'ality of coaxially arranged relatively I701 ta sble feedoperating members each rotaton a "vertical axis and adapted to mumperate with flexible feeding H1@3,11S,a-I1Cl-d-I -LV- ing connections between said-motor and said feed operating members comprising worms rotatable on transversely extending horizontal axes, worm gears meshing therewith, a spur gear arranged coaxially with. said. Worm gears spur gear connected in driving'relation with one of said-feed operating members and meshing with saidlirst mentioned" spur gear, means for: alternat vely connecting I said worm gears in driving relation with said first mentioned spur gear, and meansfor connecting said feed operating members together for simultaneous rotation. i I i i 29. In a mining machine, ainotoijand feeding means driven thereby including a plurality ofrelatively rotatable feed operating members each adaptedjto cooperate with flexible feeding means, driving connections between said motor'andjfsaid feed Operating members comprising worms rotatable on transversely extending horizontal axes, worm :gears meshing therewith, i a spurigear arranged coaxially with saidfwo'rin gears, a

larger spur gear connected in driving relaa tion withone of said feed'operating members and meshing withrsaid spur gear, means for alternatively connecting said worm gears in driving relation with said first mentioned spur gear, releasable means: for connecting said last named spur gear in driving relation with said larger spurgear, and meansfor con- I n-eoting said feed operating members together "for simultaneous rotation. I

- 30. Ina mining; machine, a motor, and feeding means driven thereby including a plurality of coaxiallyarranged relatively rotatable feedoperating members each adapted to cooperate with flexible feeding means, driving connections between said motorand said. feed operating members comprising worms rotatable on transverselyextending horizontal axes,,w orni gears meshing there-.

with, a spur geararranged coaxiallywith said worm gears, a largerspur gearflconnected in driving relation with one of said feed'opjerating inember's and meshing with said spur gear, means for alternatively connecting said a worm gears in driving relation with said first mentioned spur gear, a releasable means. for

connecting saidlast mentioned spur gearin driving relation with said larger spur'gear,

* and means for connectingsaid feed operating members: together for simultaneous rotation. v- I r i 31. In a 'mining, machineya i motor, and feeding means-driven thereby including a plurality of coaxially'arranged relatively rotatable feed operating members each rotatable on'a vertical .axis and adapted to coop.

erate -Wltl1ffleXlbl6I feeding means, driving connectionsbetween said motor and said feed operating members comprising worms rotatable on .transversely 'extending horizontal axes, worm gears meshing therewith, a spur gear arranged coaxially} with said worm gears, a larger spur .gearconnected 1n driving relation with one of said feed operating 7 members and nieshii'igfwith I said spur gear,

means foralternativelyconnecting saidworm gears in driving I'GlatIOIlWIth SaId first mentioiiedspur gear, a releasable means for con-i ne'cting' said last named spur gear in driving relation withsaid larger spur gear, and means for connecting said feed operating members together for simultaneous rotation. i

32. In a mining machine, a motor having a motor pinion,'and feeding means driven I thereby including a plurality of relatively rotatable feed operating members each adapted to cooperate with flexible feeding means, and

versely extending axis, a worm rotatable with said bevel gear, a worm gear meshing with said Worm, and driving connections between said worm gear and said feed operating memhere through which one or both of the latter may be selectively driven. I

' 33. In a mining machine, a motor having a motor pinion, and feeding means driven thereby including a plurality of coaxially arranged relatively rotatable feed operating members each adapted to cooperate with flexible feeding means, and driving connections between said motor and said feed operating members comprising a spur gear meshing with said motor pinion, a spur gear meshing with said gear, a bevel pinion rotatable with said last mentioned gear, a bevel gear meshing with said bevelpinion and r0- tatable on a'horizontal transversely extending axis, a: worm rotatable with said bevel gear, a worni'gear meshing with said worm, and driving connections between said worm gear and said feed operating members.

:34. In a mining'machine, a motor having a motor pinion,and feeding means driven thereby including a plurality of coaxially ar- 7 ranged relatively rotatable feed operating members each rotatable on a vertical axis and adapted to cooperate with flexible feeding means, and driving connections between said motor and said feed operating inembers comprising a spur gear meshing with said motor pinion,a spur gear meshing with said gear, a bevel pinion rotatable with said last mentioned gear, a bevel gear meshing \Vl'liltSftlCl bevel pinion and rotatable on a horizontaltransversely extending axis, a worm' rotatable with said bevel gear, a worm gear:

meshing withsaid worm, and driving connections between said worm gear andsaid feed operatingmembers.

thereby including a plurality of relatively rotatable feed operating members each adapted to cooperate with flexible feeding means, and driving connections between said motor and said feed operating members comprising a spur gear meshing with said 3 5. In a mining machine,amotor having i a motor pinion, andfe-eding means dIlVGII' annangedrelatively rotatable teedoperatin i teenagers:

with said bevel pinion andw rotatable on a horizontal transversely extending axis, a

worm-rotatable with said: bevel gear, a worm: gear meshing with said worm, and driving connections between saidworm geanand said feed operating members through. which one on both. otthe lattermaybe selectively driven including: a manually operable controlling clutcln. r I v 36;. In amining machine,.amotor having-a motor: pinion-,1 and: feeding means driven thereby including, a plurality of coaxially' members each: adapted to co oper ate with. ible: feeding means, and; driving connections between] said? motor and; said teed operating memberscompri'sing El? spur. gear meshing with. said; motonpinion, a: spur gear meshing with said gear, a bevelipini-on rotatablewith said; last" mentioned: gear, a. bevel gear meshing withsaid: bevel pinion; and rotatable on a; horizontal; transversely extending axis, av worm rotatable with; said bevel gear, a worm: gean' meshingfwith sai-dtworm, and: driving connections between said worm; gear. and" said feed. operating members including a; manually. operable controlling clutch.

37. In; a mining machine, a; motor having a. motor: pinion, and, feeding means driven;

thereby-including a plurality of coaxiall'y: arranged; relatia ely rotatable teed; OPQIEHJ? lng'members each rotatable on a verticalzaxis ancb adapted to cooperate' with flexible feedingmeans, and: drivingconnectionsbetween sai'd motor and said teedi'operating members comprising spur gear meshing with; said: motor pinion, a spur.- gear meshing with said? gear; bevel pinion rotatable with said itib" mentioned: gear, abevtel gear meshing with. said bevel pinion and? rotatable; on. a: horizontal transversely extending axis; a

worm rotatable with said bevel: gear; a worm geargmeshing with said worm, and driving connections-between.said worm gearand said. feedopenating members includln-g a1 mannfallv' operable: controllingclutclt 38. In a: mining 'machine, a; motor, and: feeding, means. driven thereby including plurality of relatively. rotatable-feed operating members each rotatable ona: vertical axis and adapted; to cooperate with: flexible fee-din means, anddriving connections be tween; said. motor a-ndfsai'cl feed operating members compri sing worm g s; an d means toralternatively connecting *worm gears in dni'ving" relation with said feed: operating members to cause either ofthe latter to-draw in a; portion of said; fiexible ifeeding means during" the feedingoperation.

392.111 a mining machine, a motor, and feedingrmeans driven. thereby including a plurality of: relatively rotatable feed operatin'gmembers: each rotatable on a vertical memberscomprising wornr gears, means for alternatively connectingsaid worm: gears in driving relation with said feed operatingmembers, andimeanstw permitting relative rotation. between said feedoperating; mem bers or-connecting said members-together for simultaneousrotation: to cause the latter to simultaneously draw. iii-portions of said flexible feeding means during the feeding operation: I

40:. Inna. mining: machine, a motor, and feeding means driven thereby includinga: l unalitiy of relatively rotatable feed open- .g members each rotatable on: a vertical 311181 and adapted; to; cooperate with. flexible feeding means, driving connections between; saidimotonzand saidz teed; operatingmembers, and. manually operable frictional. means for permitting relative rotation between said teed. operating members or yi'eld'ably connecting saidmemberstogether for simultaneous rotation.

41. In a mining machine;.azmotonand; feeding' means driven thereby including a plurality otj coaxiailyr arranged: relatively notat able feed; operating members each! rotatable. on vertical axis: and adapted to cooperate with; flexible. feeding. means, driving connec-.- tions between said? motor and. said feeds oper-- members,, and manually- .operable fi ic tional'meanstor permitting relative rotation between; said teed operating member's orfor yi'eldablyconnecting said members together for; simultaneous:rotation; i

- @3111 a: mining machine,v a. motor, and feeding means driven thereby including a pluralityof relativelyrotatable.-. feed: operating members each havingdos' axis-vertical; and adapted to cooperate with flexible feeding means, and driving connections between sai dmotor and: said. teed: operating members con'n prising coaX-ially. arranged worm; gears,; and means foralternatively:connecting said; Worm gears in driving relation with said feed operatingmembers.

43; In mining machine,.a.-motor, and feed ing means driven: thereby including" a; plug razlit i of coaxially' arranged relatively rotat a bleteed; operating members eaclr. having its vertical and. adapted? to cooperate with flexible feeding means, and driving connec .members each havingits: axis vertical. and

adapted to cooperate with flexible feeding means, and drivingconnections between said ,mot'orandsaid feed operating members comprising coaxially arranged worm gears, means for alternatively connecting said worm "gears ind'riving relation with said feed operatingniembersg'and means permittingrelj ativev rotation between said feed operating members or for connecting said members to- '-gether for simultaneousrotation;"f

145. In a mining machine, a'motor,;feeding means driven thereby'including a plurality of coaxiall'y "arranged relatively rotatable.

feed operating members each adapted to co-" operate with fiexiblefeeding means,and driving. connections between said motor and said fee d'operating members each adapted to cooperate with flexible feeding mean'sincluding fa: horizontal shaft extending transversely of; the machine, acsecond shaft arranged parallel with and above said-shaft, gearing connecting said shafts, fast'and slow speed worms car,-

ried by said shafts respectively, worm gears meshingjjwith' said *worms, and means for alternatively connecting said worm gears "in drlv ngrelatlon 'w thsald feed operating 46. Ina mining machine, a motor,"feeding meansldriven thereby including a plurality I of fcoaxially 'arranged'frelatively rotatable feed operatingmembers each having its axis vertical and adapted to cooperate with-flexible feeding means,- and "driving connections between said motor andfeed "operating members including a, horizontal shaft "extending transversely of the-machine, a second shaft I arranged paralleliwith and above said shaft,

operating members; j

7 latter in driving're'lation with saidfe'ed oper-f n ating members.

g aring connecting said shafts, fast and slow speed worms carried by said" shafts respectively, worm gears meshing with said worms,

and, means for alternatively connectin g said worm gears in drivin'g'relation' with saidfeed 47. In a mining machine, a motor,'and feed;

ingmeans driven thereby including a plurali'ty ofc'oaxially' arranged relativelyrotat= able: feed opera-tin members each afdapted to cooperate, with flexible 1 feeding means; and driving connectionsbetween said motor and said feed operating members comprising a horizontal shaft extending transversely of the machine, a second shaft arranged parallel with and'above said shaft, gearing connecting said shafts, fast and slow speed worms carried by said shafts respectively, worm gears meshing with said worms, and means including friction clutches arrangedcoaxially with said worm gears for alternatively connecting the tions between said motor andfeed operating members comprising a horizontal shaftoeX- tend ng transversely ofthe machine, a second shaft arranged parallel with and above said shaft,"gearing connecting said shafts, fast and slow speed Worms carried by said-shafts re- 'spectively, worm gears meshing with said worms, andmeans including frictional clutches arranged coaxiallywith said worm gearsfor alternatively connecting the latter in driving relation with said feed operating 7 members.

y 49. In a mining machine, a motor, and feeding means driven thereby-including coa'xially arranged relatively rotatable feed operating members each adapted to cooperate with flexible feedin means, andpluralspeed driving means therefor including coaxially ar-i ranged Worm gears selectively operable to drive saiolmembe'rs at different speedsfin' the same direction. i

50. Ina mining machine, a motor, and feeding means driven thereby including coaxially arrangedrelatively rotatable feed operating members each adaptedto cooperate with flexible feedingmeans, fast and slow speed I transmission means between said motor and feed operatmg members including coaxlally arranged'Wo-rm' gears, and means for only a alternatively connecting said worm gears in dr v ng relation wlth' said feed operating member'sf I ;51. In a'mining machine, a-motor, and feed- I ing means driven thereby including coaxially arranged relatively rotatable v feeding operating'members each having its'axis vertical and adapted to cooperate with flexible feeding means, fastvand'slow speed transmission means between said motor and feed operat ingi members including coaxially arranged worm gears, and means for onlyalternatively .connectingsaid worm gears in driving rela' tion with said feed operating members. 52- In a mining machine, a motor, and feed ing means driventhereby including a plucooperate with flexible feeding means, 1 and fast and slow speed transmission means between said motor and feed operating members including coaxially arranged Wormgears rotatable on a vertical axis and selectively ops erable to drive said feed operating members at different speeds in the same direction.

' 53. In a miningmachine, a motor, and feeding means driven thereby including a plu rality of. coaxially arranged relatively. ro-

its axis verticalandadapted to cooperate with flexible ffeedingmeans, and fast and sloW I, i rality'of'coaxially arranged'relatively rotata- 'ble feed operating members each adapted to ablefeed operating members each having speed transmission means bet-weensaidmotor I axially arranged wormgears selectively opand feed operating members including coerable to drive said members at different speedsin the same direction, said worm gears being; disposed on axes p rality of coaxiallyarranged relatively rotatable feed operatlnginembers each adapted;

to'cooperate with flexible feeding means, and

fast: and slow speed transmission means be tween said motor and S3161 feed operating members including coaxially arranged wern'i gearsrotatable about a vertical ax s, and

means for only alternatively connectingsaid worm gears in driving relation'w th said feed operating members; 7

55. In a miningmachine, a motor, and feed-' v ingmeans driven thereby including a plurallty of coax ally arranged relatively ro- 'tatable feed operating members each having its axis verticaland adapted to cooperate withflexible feeding means, and fast and slow speed transmissionmeans between said motor a and :feed operating members including co axially. arranged worm gears disposedv on an" ax1s parallel with the axes of said feed opcrating members, and means for only alternate lively connectingsaid worm gears in driving,

"relation with said feed operatingmembers.

56. In a mining machine, a motor, and feeding means driven thereby including; plurality ofrelatively rotatable feed operating members each adapted to cooperate with flexible feeding means, and fast andslow speedtransmissionmeans between said motor and said'members including parallel orms rotatable on horizontal axes extending transversely of. the machine, r

5 7. In a mining machine, a motor and feeding means driven thereby including a plurality of relatively rotatable feed operat inglmembers each adapted to cooperatewith flexible feeding means, and fast and slow. speed transmission means between said motor and said members including parallelworms 1 rotai able on horizontal axes extendingitrans- 7 verse'l'y of the machine, and coaxially; ar-

ranged worm respectively. I v is 7 58. In a mining machine, a motor, and. feeding meansdriven thereby including 1a plurality of coaxially arranged relatively rotatable'feed operating members'each having its axis vertical and adapted to cooperate with flexible feedingmeans, fast'andslow speed transmission means between said motor and said feed operating members including parallel wormsrotatable on horizontal axes extending transversely of the machine.

59. In a mining machine; a motor, and feeding means driven thereby including a plurality of coaxially arranged I relatively rotatable feed operating members each hav-, ing itsaxis verticaland adapted to cooperate with flexible. feeding means, fast and slow speed transmission means, between said motor gears meshing with said worms andsaid feed operating members including.

parallel worms rotatable, on 1 horizontal axes! extending, transversely of: the 3 machine,- and coaxially arranged worm feeding means driven thereby includinga,

plurality of coaxially. arranged relatively rotatable feed operatingrmembers eachhaV- ing its axis verticalandadapted to coopera e with flexible feeding means, and fast and slow speedtransmission means between-said motor and said feed operating members, lI1-- cluding parallel worms; rotatablev on hori? zontal axes extending transversely of themachine, coaxially arranged worm gears; meshing with said worms respectively, andmeans for alternativelyconnecting said: worm gears in driving relation, with said feed; operating members.

'61 Ina mining. machine, a. machine r frame slidable on its bottomv on; the mine bottom; and carrying a; horizontal moton having; its;

gears meshing with; r

iii

axis extending longitudinally, of theema.

chine,cutting mechanismv driven fromone, end of said motor. including a pivoted-cutter bar adjustable into positions at each'side of, saidframe and lengthwise of said frame, and feeding means driven, fromthe oppositeend of said: motor includingcoaielally arr ranged relatively rotatable feed operating members each adapted to be driven by said motor, and cooperating flexible feedingmeans for feeding the" machine bodily over; the;

mine bottom in any position of said cutter. bar and including, advance and receding flex: ible feeding portions cooperating with; said feed operating membersrespectively.

62.1n a miningmachine, a horizontal; motor having its axis, extending longiludinally of the machine, cutting mechanism driven: from one endrofsaid motor including a pivoted cutter bar adjustable intoTpositiQns at each side ofthe. machine and lengthwise of the machine, and feeding means driven from the 'oppositeen'dof. saidamotor for feed:

,ing t-h-egmachine in, any position of said bar. including coaxially arranged relatively rotatable feedoperating'mem'bers disposed :on a vertical axis and each adapted to cooperate with flexible, feedingmeans." I

63. In a mining machine, a. machine frame slidable on. its bottom on the, mine bottom and carrying a horizontal motor having its axis extending longitudinally of, the machine, cutting mechanism driven from one end of said motor including aghorizontal- 'swinga-ble cutter bar, and feeding mechanism driven from the opposite end of said vvmotor for feeding the machine bodily laterally over the mine bottom including coaxially arranged relatively rotatable feed operating members disposed on-a vertical axis and; each adapted to cooperate with flexible feeding. means.

64:. In a. mining machine, a machineframe presenting parallel plane surfaces uponwhich ill)

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