US1849297A - Mining machine - Google Patents

Description

March 15, 1932. M. P. HOLMES MINING MACHINE 7 Sheets-Sheet 1 Filed Oct. 31. 1927 March 15, M. p HOLMES mums momma Filed Oct. 51. 1927 '7 Sheets-Sheet 2 1v 0 MWNW O u o W O u Q 83% 82% v a 3 5 W a HM 1 I I o v 1\ L w L 7 4 I H w L 7 wkw @w Q\ m t a Rwy Q3 gr m ml QR Q Q? %%N NMWN N s @a ma mww 3N m WW e Q & QN

an kw 3 N3 @x s E s. v g Q a m Q. Q a 8 a? m N3 l Q3 I V d |H l m 3 N gm QmN NNN m MQN Q v MW WEN NfiN %%N 3 m mN WW $3 QQ E R March 15,1932.

-M P. HOLMES MINING MACHINE l iled oct. 31, 192 7 Sheets-Sheet 3 March 15, 1932. M, P. HOLMES MINING MACHINE 4 7 Filed Oct. 31. 1927 7 Sheets-Sheet 5 8 F m E... H2 M4 L 6 W 7 6 y M 6 WU M 00 .6 w m E March 15, 1932. M. P. HOLMES MINING MACHINE Filed Oct. 31. 1927 'TSheets-Sheet 6 Q a i @w 1 Q j w $2 A lway g a n i g. A W 5 x 8 $3 an 3 I i S Q March 15, 1932. M. P. HOLMES MINING MACHINE Shets-Sheet 7 Filed Oct. 31. 1927 Patented Mar. 15, 1932 UNITED STATES PATENT OFFICE Monms P. HOLMES, or CLAREMONT, NEW HAMPSHIRE, ASSIGNOR To SULLIVAN MA- CHI-NERY COMPANY, A CORPORATION or vrassacnnsnr'rs 'MINING MACHINE Application filed October 31, 1827. Serial No. 280,034..

' This invention relates to mining machines and more particularly, but not exclusively, to coal miningmachinesof the wheel mounted universal type adapted to operate from the mine trackway.

An object of this invention is to provide an improved coal mining machine of the wheel mounted type. Another objectiof this 1nvention is to provide an improved coal inining machine of the wheel mounted funlvertype adapted to operate either asa. horizontal cutter or a shear cutter,; A,further object of this invention is to provide an improved coal mining machineot the combined other objects and advantages of thisinven-.

tion will, however, subsequently more full appear as the description proceeds.

In the accompanying drawings there is shown for purposes of illustration one form which the invention may assumein practice.

In these drawings, i i

Fig. 1 is a plan view of a coal mining machine with which one illustrative embodiment of the invention is incorporated.

Fig. 2 is a side elevational view of the machine shown in- Fig. 1, the machine being shown in its lowered position.

Fig. 3 is a horizontal longitudinally -ex tending sectional view taken on line 3"3 of Fig. 2, partsbeing shown in plan.

Fig.4: is a horizontalv longitudinally ex:

tending sectional view taken 'on line 44 of Fig. 2, the viewbeing shown partially in plan.

Figs. 5 and 5a are detail sectional views taken on lines 55 and 5a5a respectively of Fig. 4.

Fig. 6 is a detail View illustrating the con trol handle for the reverse controlling frictions of the elevating and tilting mechanism for the machine body. 7,

Fig. 7 is a transverse vertical sectional view taken on line 7-7 of Fig. 3.

Fig. 8 is a transverse vertical sectional-view taken on line 88 f Fig. 3.

Fig. 9 is atransverse sectional view taken on line 9-99 of Fig. 4.

.Fig. 10 is a somewhat'diagrammatic view illustrating the elevating and tilting means for the machine body, diflerent positions thereof being illustrated by dotted lines;

Fig. 11 is an enlarged i'ragmentary plan view wlthparts shown in sections illustrating the improved controlling arrangement. for? the controlling clutches of the .various devices. y I

Fig. 12 is an enlarged detail sectional view illustrating a portion of the improved con- Fig. 13 is a; transversesectional view-taken on line131-3 of Fig. 12. I p

i Fig. ll is a detail sectional viewtaken on line 1ll4. of Fig. 11. v

Fig. '15. is a detailsectional view taken on line 15l5 of Fig.11. f

' Fig. 16 is a detail sectional viewta-ken on line 16l6'of Fig. 11.

Fig. 17 is a detail view illustrating the 1 improved truck Wheel braking means.

In this illustrative embodiment. ofthe invention there is shown a mining machine of the same general type as that described in my 'copending application Ser. No. 137,600, filed September 24, 1926, now matured inPatent No. 1,785,961, patented December 23, 1930. As shown, the improved mining machineis trolling means taken on line 12'12' o fFig.. 1

designated as an entirety by the reference character 1, the machine being of the socalled universal type mounted on wheels and operating fromthe mine tra'ckway. The mining machine 1 generally comprises a ma chine body 2 rotatably mounted j about its longitudinal axis on the truck frame and composedof a section 3, hereinthe cutter carrying head, housing the driving connections for the cutting mechanism and a motor section 4, these sections 3 and 4 being rigidly united and suitably mounted on a wheel sidered unnecessary.

frame includes longltudmally spaced transsion means for the truck drive, for rotating the machine body, and for elevating and tilting the machine body. The head 3 has pivotally mounted thereon a usual elongated plane cutter bar 7 having an endless cutter bit carrymg cutter chain 8 mounted on 1ts margin. The swinging mechanism for the cutter bar and the driving connections for the cutter chain are clearly described in my copending application mentioned above and further description of the same is herein con- The wheel mounted verse frames 9 and 10 held in rigid spaced relation by parallel longitudinally extending frames or angle members 11, the latter'bein'g rigidly secured to the transverse frame members 9 and 10 as by suitable screws 12. These angle members 11 support various devices of the machine as will later be described. As clearly shown in Figs. 3, 7 and 8 the frame members 9 and 10 are respectively provided with semicircular bores 13 which receive alined bearing sleeves 14 and 15 in which cylindrical portions 16 formed on frame sections 17 and 18 are respectively rotatably mounted, the frame sections 17 and 18 being connected by bolts 19 respectively to the opposite ends of the motor section .4. It will herein be observed that the framemember 17 is preferably composed of two parts to facilitate manufacture, assembly, and the dismantling of the machine, The frame member 17 is also connected by bolts 20 to the cutter carrying head 3. The transverse frame members 9 and 10 are each horizontally split as at 21 and are provided with detachable cap members'22and 23 respectively, each held in position by suitable screws 24, these caps retaining the bearing sleeves 14 and 15 in position and permitting removal of the cutter carrying and motor frames from their bearings. As illustrated, the frame section 6 which houses the plural speed transmission mechanism for the truck drive,the machine body elevating and tilting mechanism, and bar rotating mechanism is rigidly secured to the longitudinally extending frame members 11 by screws 25, the cutter carrying frame 3 and the motor frame section 4 constituting the machine body 2 being adapted to rotate relative to the frame section 6 as hereinafter more fully described.

As illustrated, suitably connected to the transverse frame members 9 and 10 are piv oted supporting arms 26 and 27 which carry the truck wheels 28, the arms 26 and 2'? and the wheels 28 constituting the supporting means, for the machine. j i

In specifically describing the truck wheel propulsion mechanism it will herein be noted that housed within the motor section 4 is a shaft 34 disposed in longitudinal alinement with the armature shaft, the front end of the shaft 34 being supported by the member 32 while the rearward end of this shaft is ournaled in a ball bearing 35 suitably carried within the frame section 6 as clearly shown in Figs. 3 and 4. This shaft 34 has fixed thereto at its rear end by a key and screw connection 36 a spurpinion 37 which meshes with a larger spur gear 38 (see also Fig. 9),

suitably secured to a shaft 39 Suitably jours.

naled withinthe frame section 6. The shaft 39 is disposed parallel with the shaft 34 and slightly below the latter. Theshaft 39 has keyed thereto at 40 a worm 41, herein the fast speed worm, which meshes witha worm gear e:- 42. Also secured tothe shaft 39 betweenthe worm 41 and the spur gear 38 is a spur pinion 43 which meshes with a larger spur gear 44 secured to" a shaft 45 disposed parallel with the shaft 39 and in the same transverse -..:-1

horizontal plane. The shaft 45 has keyed thereto at .46 a worm 47, herein the slow speed worm, whichmeshes with a worm gear 48. As shown, the worm gears 42 and 48 are journaled'o'n ball bearings 49carried by a horizontal shaft 50 disposed transversely of the machine and journal'ed at opposite ends in ball bearings 51' suitably carried within the frame section 6, the central portion of the shaft 50 being journaled in ball bear- 1-..5;

ings 52 carried within a retaining member 53 suitably supported within an annular split boss 54 formed within the frame section 6. As the clutch mechanisms for connecting the gears 42 and 48 to the shaft 50 to effect rotation of the latter at afast or at a slow speed are substantially identical, detail description of one will suflice for both. The gear 42 is made hollow and carries therein a series of clutch plates 55 which are interleaved with a l corresponding series of, clutch plates v56 carried by a clutch-member 57 keyed at 58 (see Fun 9 to the shaft 50. Encirchn the clutch member 57 and axially slidable there- Also 14:

on is a clutch applying member .59. encircling each of the clutch members 57 and .disposed at opposite ends of the shaft 50 are clutch shipper members 60 and 61, suitable ball thrust bearings 62 being interposedbetween the members 59 and. the members 60 and 61, respectively. As clearly shown in Fig. 9 disposed above the shaft 50 and parallel therewith is a plural part actuating rod 63 slidably mounted in bores 64 formed within the framesection 6. Pivotally connected adjacentthe opposite ends of. the rod 63 at 65 are clutch shipper yokes 66 which cooperate respectively with: clutch shipper members 60 and 61. These fclutch shipper yokes 66 are also pivotallyconnected as at 67 to link members 68, these link members in turn being pivotally connected at 69 to aportion of the frame section 6. As shown the intermediate portion of the actuating rod63 is transversely slotted at the top and bottom thereof at 70 and the bifurcated end of a pivoted lever 71 cooperates with these slots as clearly shown in Fig. 11. The lever 71'is pivoted at 72 on the machine frame. The improved operating connections for this lever will later be described. From the foregoing it is evident that when the lever 71 is swung about its pivot the actuating rod 63 is slid axially, thereby swinging the shipper yokes 66 about their pivots 67 consequently applyingthe desired friction clutch and connecting either the fast speed or the slow speed worm gear in driving relation with the shaft 50. The shaft 50' is herein rotated in the same direction at either a slow speed or a'fast speed. As clearly shown in Figs. 4 and 9 suitably secured to one end of the shaft 50 is a bevel pinion '75 which meshes with bevel gears 76 and 77, these gears 76 and 77 rotating in opposite directions and constituting a reversing mechanism, as hereinafter described, for driving the truck wheels and rotating the cutter carrying head in opposite directions. The gears '76 and 77 are each I provided'with ahub portion 78 journaled on a bearing sleeve 79 carried by a shaft 80, this shaft being disposed at a right angle to the shaft 50 and extending longitudinally of the machine. As illustrated, the shaft 80 is jour-' naled at its opposite ends in suitable ball bearings 81 suitably carried within the frame section 6. Carriedwithin each of the gears I 87, suitable ball thrust bearings 88 being. in-

terposed between the clutch shipper member 87 and each of the clutch applying members 86. Cooperating with the peripheral groove formed on the clutch shipper member 87 is a'clutch shipper yoke 89 pivotally connected to a trunnion 90 threadedly connected to an actuating 'rod 91, the latter being 'sudably mounted with alined bores 92 formed within the frame section 6. The operating mechanisnr for the clutch shipper yoke 89 will be subsequently described. It will thus be evident that when" the clutch housed: in one or the other of the bevel gears 76, 77 is applied,

the shaft 80 may be rotated in 'one'direction or the other ,andalso at either a fast or a slow speed under the control of the fr ct on clutches 5 5, '56 for theworm gears 42, 48,

As shown, secured tothe forward end ofthe shaft 80 as bya detaehable'coupling member 93 and alined therewith is a shaft '94: journaled at its forward end in a ball bearing 95 "suitably carried within the transverse frame member 10. The shaft 94 has secured thereto at its forward end a bevel pinion 96 which meshes with a larger-bevel gear'97 rotatably: mounted on a horizontal shaft 98 disposed parallel to the transverseshaftbO and at a right angle to the shaft 94 as clearly shown in Fig. 3. The. shaft 98 is 'journaled at its opposite ends in alined ball'bearings '99 suitably carried by the transverse frame member 10. Herein, preferably formed integral with the bevel gear 97, are clutch teeth.l00,- while preferably formed integral with the shaft 98 are clutchteeth 101 and-these clutch teeth 100 and 101 are adapted to be connected by means of an axially movable internally ttiothed clutch member 102, thereby causing the geari-97 and shaft 98 to rotate together.

The 6 improved actuating. mechanism, for 1: the clutclrmember 102 will be subsequently described. Secured to the outer end of the shaft 98 by a screw: and key connection'103 is a chain sprocket 1'04 and this chain sprocket is connected, as clearly shown in Fig. 8, by an endless chain connection 105 to a chain sprocket "106. The chain sprocket 106 is secured by akey and screwconnectioni107; to

by a key and screw connection 109..is' a chain 76, 771s a series of friction clutch plates 82" sprocket 110. Connected by-a'dentarl" clutch 111 to the inner end of the chain sprocket '110 is a sleeve member 112, this latter member.

in turn being clutched at 113 to a chain sprocket 114. This sprocket 114 is connected by an endless chain connection 115 to a sprocket on one end of a horizontal'axle116 carried: The axle 116 is journaledat its 0p- Secured to the end of the i disposed below and'parallel with the. shaft. 108 {B5 and by which the rear vtruck wheels 28 "are posite ends in suitable roller bearings 117 carried within the 'lowerfend of the supporting arm27. The shaft 108 is 'journaled at its opposlte ends in roller'bearmgs-11-8 carried within the opposite sides. of th'e transverse frame member 10. As shown in 8 the upper end of the supporting arm 27 is pivotally mounted for swinging movement- :on roller bearings 119 supported 'by the shaft 108. In

accordance with'this illustrative embodiment of the mvention the chain sprocket 110 is connected as by an endless chain connection120 (see Fig. 10) to a chain sprocket 121 secured by'akey and screw connection 122 to a horizontal shaft 123 (see Fig. 7), the latter being j ournaled at its inner end in a ball hearing' 124 while the outer end of this shaft is journaled in roller bearings 125, these bearings being carried by the frame section 9. As

clearly shown in Fig. 7 the chain sprocket 121 ries the truck wheels 28 and is journaled at its opposite ends in roller bearings 134 car ried within the lower end of the supporting arm 26. The'upper end of the arm 26 is pivotally mounted for swinging movement on a roller bearing 135 supported at the side thereof adjacent the sprocket 129 on the shaft 123 ;while the other side is supportedon a roller bearing 136 supported by a shaft 137 to be later described.

In specifically describing the improved mechanism for bodily rotating the motor casing and cutter carrying head to vary the plane of the cut it will be noted that meshing with the bevel gear 97 (see Fig. is a bevel pinion 138 suitably fixed to the rear end of a shaft 139 alined with the shaft 94 and journaled at its rear end in a ball bearing 140 suitably supported within the frame men'iber 10. The forward end of the shaft 139 is con- 'nectedby a detachable coupling 141 to the rearend of a shaft 142, the latter being our naled at its forward end in a ball bearing 143 suitably supported by the transverse frame member 9. i As shown, the shaft 142 has secured thereto at its forward end a bevel pinion 144 which meshes with a bevel gear 145 rotatably mountedon ahorizontal shaft 146 disposed parallel with the shaft 98 heretofore described. The shaft 146' is journaled at its opposite ends in alined ball bearings 147 carried by the transverse frame member 9. Herein preferably formed integral with the bevel gear 145 are clutch teeth 148, while preferably formed integral with the shaft 146 are clutch teeth 149 and thesecl-utch teeth are adapted to be connected by means of an axially movable internally toothed clutch member 150, thereby causing the bevel 145 and the shaft 146 to rotate together. It will further be noted that secured to the outer end of the shaft 146 by a key and screw con- 'nection151 is a chain sprocket 152 and this sprocket is connected by means of an endless chain connectlon 153 (see Fig. 7) with chain sprocket 154 secured by a key and screw connection 155 to the outer end of the shaft 137. The shaft 137 is journaled in hell bearings 156 and roller'bearings 157 carried by the transverse frame member 9. The shaft 137 carries adjacent its inner end a worm 158 which meshes with aworm gear 159 (see also Fig. 3) secured by bolts 160 to the frame member 16 and disposed coairially with the motor axis. The improved actuating means for the'clutch member 150 will hereinafter be described. From the foregoing description it will be evident that when the gear and clutch teeth 148, 149 are connected by the clutch member 150, it being understood that the shaft 142 is rotating, the worm gear 159 is consequentlyrotated and the cutting inechanism may thus be moved to operate in different planes, i. e. a horizontal plane or a vertical plane. 6

p In specifically describing the mechanism for eievating and tilting the machine body, it will herein be noted that secured by a key at 161 (see Fig. 4) to the end of the shaft 50 opposite from the bevel gear is a bevel pinion 162 which meshes with bevel gears 16.3 and 164. The bevel gears 163, 164 are similar to the bevel gears 76 and 77 and likewise rotate in opposite directions and constitute a reversing mechanism. These gears'also house friction clutches 165,166 similar to the clutches within the gears 76, 77 and having a similar central clutch applying memher 167. 'As the specific constructionof the clutches-165, 166 and the actuatingmeans therefor has been clearly described inconnection with the clutches 82, 83 within the bevel gears 76 and 77 ,:further description thereof is herein considered unnecessary.

Cooperating with the peripheral groove formed on the clutchshippermember 167 is a clutch shipper yoke 168 pivotally connected to a trunnion 169 adjustably mounted en a rod 170, the latter being slidably mounted within alined bores 171 formed within the frame section 6. Pivoted on the machine frame at 172 (see also Fig. 6) is an operating handle 173 in the form of a bell crank and having one of its arms 174 projecting within an aperture 175 formed within'the rod 170. It will thus be evident that when the operator suitably manipulates the handle 17 3 the rod 170 is moved axially in the desired direction, thereby effecting application of the desired friction clutch. As shown in Fig. 4 arranged coaxially with the bevel gears 163,- 164 is a shaft 176 similar to the shaft 80 and likewise is adapted to be driven in'opposite directions of the shaft 178 by a key and lock nut conthrough the bevel gearing. The forward end of the shaft 17 6 is connected by a detach- As illustrated, secured to the forward end nection 181 is a toothed clutch member 182.

which is adapted to be connected by means 'of an axially movable internallyv toothed threaded. shaft 186 arranged in axial alinevated or lowered as desired.

ment with the shaft 178. This shaft 186 is journaled at its rear end in a bearing sleeve 187 suitably supported within the clutch housing 180. Inter-posed between a flange 188 formed on each of the shafts 178 and 186 and the hubs of each-0f the clutch members 182, 184 is a ball thrust bearing 189 and these bearings absorb the axial thrust of the shafts in either direction. shafts are respectively threadedly connected at 190 to non-rotatable nut members 191, 192 of rectangular cross section slidably mounted in suitable guideways 193, these nut members each having formed thereon .at the bottom thereof teeth 194 which cooperate with teeth 195 formed on arcuate members 196, 197 secured as by screws 198 to the machine supporting arms 27 and 26, respectively. As

shown in Fig. 3 the internal clutch member 183 is adapted to be shifted axially by means of a shipper yoke 199 having an elongated guide portion 200 slidably mountedin a slot or guideway 201 formed within the clutch housing 180. A screw 202 is threadedly connected to the shipper yoke 199 and projects laterally therefrom through an elongated slot 203 formed in the gear housing 180 and this screw carries a resiliently positioned operating member 204, a spring 205 being provided for yieldably maintaining the operating member 204 in engagement with locking apertures in the gear housing. From" the foregoing description it will thus be evident that when the clutch members 182, 184 are connected by the clutch member 183, it being understood that the shaft 17 6 is rotating, the screw threaded shafts 178, 186are also rofated and consequently the nut members 191 and 192 are moved axially in their guides thereby swinging the machine supporting arms 26 and 27, respectively about their pivots and the machine body is consequentlyele- Furthermore,i t willfbe noted that if the clutch members 182, 184 are disconnected the shaft 186 remains stationary while the shaft 178 continues to rotate and consequently effecting swinging movement of only the rear supporting arms 27 and as a result tiltingthe machine body about the front truck axle 133. It is obvious that the arms 26 and '27may be swung in opposite directions at either afas't or a slow speed. a

Now referring to the improved operating" mechanism for the friction clutches housed within the fast and slow speed worm gears 42and 48 it will be noted that the lever 71.

shown in Fig. 11 has pivotally'connected These screw threaded.

thereto a two-part trunnion 207 having hOllSGd tllGTGlIl a ball thrust bearing 208 which engages an actuating shaft or rod 209,

the latter being horizontally disposedand extending transversely of the machine. The

outer end of this rod 209 has keyed theretoat 210 a toothed clutch member 211, the

teeth of which are adapted to cooperate with. internal clutch teeth 212 formed Within a hand wheel 213 encircling the clutch member 211 and slidable axially relative thereto. is As illustrated in Fig. 1.2 the teeth 212 aread'apted cooperate with clutch teeth 214 formed on a. pressure screw threadedly connected at 216 to a nut 217, herein preferably formed integral with a bracket 218 rigidlyconnected by-screws 219 to one of theangle members 11 of the truck frame. Interposied between the hub of the clutch member 211 and the pressure screw 215 is a ball thrust bearing220 while a similar ball thrust bearing,221 is interposed between thdprssure screw 215 and a shoulder on the rod 209. 'It will thus be evident that when the clutch teeth 212 and 214 are connected vandupon rotation of the hand wheel 213, the pressure screw 215' is moved axially relative to the. stationary nut 217 and as a result the rod 209 is shifted axially, thereby eifecting'swinging movement of the lever 71. This swin ing movement of the lever 71 effects sli ing' movement of the actuating rod. 63, thereby swinging the shipper y okes 66 about their,

pivots. As a result one or the other of the clutches housed within the fast and slow speed wormvgears 42 and 48 is applied while I the other clutch is released. Herein preferably formedintegral withthe rod 209' is'a crank or arm 222 pivotally and sli-dably con nected at 223 (see also Figs13') to a toggle arm or link 224, the latter in turn being piv otally connected at 225 to a rocker arm 226 keyed at 227 to a horizontal actuating shaft 228 arranged parallel with the shaft 209."

The shaft 228 is rotatably mounted within the bracket 218 and a similar bracket carried by the member 11 at the opposite side of the machine. Secured to the opposite end ofthe shaft 228 (see'Figs; 12 and 16) is a bifurcated arm 229 having its projecting ends disposed shipper yoke89. From the foregoing it, is evident that when the hand wheel 213, is shiftedoutwa-r dl-y and the clutch teeth211, 212 connected, and upon rotation ofthe hand wheel the rod 209 is rotated and this ro'tative movement is transmittedfthrough the crank 222, toggle link 224, rocker 226to the transverse shaft 228, and as a result the arm 2291 is swung laterally, thereby shifting the rod 91 axially and applying one or. the other between spaced collars or 'abutments 230 secured to the actuating rod 91for theclutchof the clutches s2, 83 within the bevel. gears i 76 and 77. Consequently one or the other of these bevel gears is connected in drivin'g r eally connected thereto a shipper handle 232 (see Fig. 11). This bracket 231 is connected by parallel tie rods 233. to a shipper mem v ber 234 likewise slidably mounted on the shaft 228. In this instance the shipper mem her 234 has formed thereon upstanding parallel portions 235 having formed therein oppositely disposed cam slots 236 and 237, respectively, each of these slots having an 1nclined portion 236 and a horizontal portion 237. Cooperating with the cam slot 236 is a pin 238 carried on the outer end of a lever 239 secured by a set screw 240 to a horizontal actuating shaft or rod 241, the latter being disposed longitudinally of the machine as clearly shown in Fig. 11. 'This rod 241 is.

connected by a coupling 242 to a rod or shaft 243 rotatively mounted at its forward end within the transverse frame member 9. :This rod 243 has splined thereto at 244 a shipper yoke 245 (see also Fig. 7) which cooperates with the peripheral groove formed on the clutch member 150. Cooperating with the cam sl0t'237 is a pin 246 (see Fig. 11) caru ried by the outer end of a lever 247 fixed to a two-part clutch connected sleeve or hollow shaft 248 within which the rod 241 1s rotatably mounted, this sleeve belng suitably your naled on the transverse frame member 10.

As shown, keyed to the forward end of the sleeve 248 at 249 is a shipper yoke 250 (see also Fig. 8) which cooperates with the peripheral groove formed on the clutch member 102. From the foregoing it will be evi- 4c dent that when the operator grasps the handle 232 and slides the shipper member 234 lengthwise of the shaft 228 one of the levers 239, 247 remains stationary, the pin carried thereby entering the horizontal portion 237 of the cam slot while the other lever is swung downwardly by the cam and as a result one of the clutch members 102, 150 is shifted into operative-position while the other clutch member is maintainedreleased. When the shipper member 234 is shifted in the opposite direction the other clutch is connected while thefirst mentioned clutch is released. It is accordingly evident that the cutter carrying 4 head rotating mechanism and the truck driving mechanism are only alternatively connected in driving relation with the motor.

As illustrated, electric current is adapted to be conducted to the electric driving motor H u 4 through suitable conductor cables 251, 6

and 253 (see Figs. 1 and 4). The cable 251 passes through a suitable guiding device 253*" and is connected to a suitable cable reel 254 j ournaled at 255 upon a bracket member 256 rigidly secured to the rear ends of the angle members 11. Suitable slip ring connections,

shown in Fig. 4.

transverse frame member 10 (see Figs. 1,

2 and 8) The wires housed within the'con ductor cable are connected through suitable terminals 259and wires 260 to resilient contact members 261 suitably secured to the cap member 267 has housed therein a ratchet ably engage slip' rings 262 secured for rotation with the ca'smg'of the motor. It w ll thus be evident that the slip rings 262 rotate bodily with the motor casingand current is adapted to be supplied throughthese slip rings and the contacts to the motor irrespective of the position of the motor frame relative to the truck frame '6. 254 is adapted to be rotated by power, and mechanism for accomplishing this is clearly Secured by a key 265 to the rear end of the shaft 80 is a clutch member 266 which is adapted to be frictionally connected to a clutch member 267 by means of a clutch applying member 268. The member 268 is normally automatically maintained in applied position by means of suitable coiled springs 268. The, hub of the clutch member 267 has housed therein a ratchet mechanism including a spring pressed pawl 269 adapted to cooperate with a tooth 270 formed on the member 267. The pawl 269 is carried by a shaft 271 connected through a universal joint 272 to a shaft 273. The shaft 273 has fixed thereto at its rear end a bevel pinion 274 which meshes with a'bevel gear 275 rigidly fixed to the reel shaft. The

pawl 269 carried by the shaft 271' may be manually released from engagement with the tooth 270 on the clutch member 267 by means of a member 276, herein in the form of a hand wheel, rotatably mounted on the shaft 271 (see Fig. This member has formed thereon an'arcuate slot or notch 27'?" in the form of a cam, the curved surface of which is adapted to engage the pawl 269. Upon rotation of the member 27 6 in either direction the pawl is forced inwardly, thereby'releasing the clutch member 267 from the shaft 271 and'disconnecting the reel drive. Spring pressed plungers or balls 278 carried by the shaft 271 are adapted to engage suitable apertures 279 formed on thc'rhand wheel to maintain the latter in its different adjusted 1 The cable reel for controlling rotation of the truck wheels shafts 123 and 108 (see Figs. 7, Sand 17).

Cooperating with these brake drums are brake bands 282 and 283 respectively, and

these bands are adapted to be contracted and expanded by means of suitable toggle lever mechanisms 284 and a connecting pull. rod

285. A suitable operating lever is provided having ratchet means 287 for holding the same in its different adjusted positions. It is obvious that by a mere pull on the lever 286 the brakes may be simultaneously ap plied, thereby preventing rotation of the shafts 123, 108 which are connectedtothe truck wheels.

The general mode of operation of the line proved mining machine is'as follows: lVhen it is desired to propel the machine along the] trackway in the main entry at a fast or transport speed the operator grasps the hand wheel 213 and slides the same inwardly, thereby connecting the clutch teeth 212, 214 and upon rotation: of this hand wheel the pressure'screw together with the'rod 209 are moved inwardly, thereby swinging the lever 71 about its pivot and applying'the friction clutch 55, 56 connecting the fast speed worm gear 42 to the shaft 50. The operator then disconnects the clutch teeth 212, 214 and slides the teeth 212 into engagement with bevel gear 76 to the shaft 80. When the working face of the coal is reached these clutches are then released. It is obvious that upon application of the clutch82, 83 connecting the bevel gear 77 to the shaft 80 the direction of rotation of the latter is reversed and the machine is propelled rearwardlyat a fast speed. If it isdesired-to make a horizontal cut the swinging mechanism for the cutter bar 7 is suitably connected to the motor and the cutter bar is swung or slued about its pivot at a fast speed to a point adjacent'the right hand rib in a manner clearly described in my copending application mentioned above. The driving mechanism for the cutter chain 8 is then connected to the motor the lever 71 about its pivot, thereby applying V the friction clutch 55, 56 for connecting the slow speed worm gear 48 to the shaft50. The operator then disconnectsthe teeth 212,

214and slides the teeth 212 into engagement with the teeth on the clutch members2lland upon rotation of the hand wheel the rods 209, 228 are rotated, and as: a result, therod'91 is moved axially, applying the clutch 82, 83 C 11- necting the bevel gear 76 to the shaft 80. The operator then grasps the leverf232 and'shifts the shipper member 234 inwardly, thezcam slot 237 forcing the lever 247 downwardly, thereby connecting the clutch 100, 101, 102 and the cutter bar is sumped or fed into the coal at a slower cutting speed,.the machine moving bodily along the trackway. ,Vhen the sumping cut is completed the operator swings the lever 286, therebyeiiectingapplr cation of the brakes 282, 283 which prevent rotation of theshafts 123,108 and consequentter bar is withdrawn from the coal at a cutting speed, If it is desired to make the shear cut the operator graspsthe lever 232 and shifts the shipper member 234'outwardly, thereby swinging the 'lever239 downwardly and connecting the clutch 148, 149, 150, thereby causing rotation of the worm 158 and worm gear 159 and the cutter carrying head and motor casing are bodily rotated into a vertical. position within the bearings 14 and15. The worm 15.8 and Worm gear 159 maintain the bar rotating mechanism in its adjusted position at this time, the worm and wormgear being self-locking' The cutter bar is then swung upwardly about its pivot at a fast speed to a point adjacent the mine roof. The cutter bar is thereafter sumped into the coal at a cutting speed, the machine moving bodily along the trackway at that time. The cutter bar is then swung downwardly at a- ,cuttingspeed to the bottom of the mine and the bar is thereafter withdrawn at a cutting to the horizontal out. If it is desired to vary,

the elevation of the cutter bar of the machine body the clutch 182, 183, 184 is connected. The friction clutch 166 is then applied, connecting, the bevel gear 164t0 the shaft 176,

it being'understood that the clutch 55,-56 f connecting the slow speed worm gear 48 to the shaft 50 is still applied, and as a result the screw threaded shafts 178, 186 are simul taneously rotated, thereby, sliding the nut elements 191, 192 in their guideways and swinging the gear segments 1%, 19713.11d0011 sequently moving the machine body upward:-

- connecting the bevel gear 163 to theshaft 176is an lied and the near se ments 196 197 l o 2 v are swung 1n the opposite direction, consequently lowering the machine body. If it is desired to tilt the cutter bar the clutch 182,

183, 184; isdisconnected ano upon rotation of the screw threaded shaft 178 the threaded nut 191 is. moved in its guideway while the nut member 192 remains stationary, thereby causing only'the rear supporting arm 27 to be swung about its pivot, and as a result the machine is swung about the front truck axle, thus varying the angle ofthe machine body relative to the horizontal and consequently the angle of the cutter bar relative'to the mine bottom. It is obvious that by simply rotating the handwheel 276 the cablereel 254 may be connected to the motor to wind in the conductor cable 251. Other operations and advantages of this invention will be clearly apparent to those skilled in this art.

While I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same has been shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing of said head, clutches controlling said transmission mechanism, a clutch controlling said truck driving mechanism, and operating means for said head rotation control clutch and said truck drive control clutch including a single manually operable controlling member common to the control of both clutches.

2. In a mining machine, a motor, a cable reel, and driving connections between said motor .andfreel including a drive shaft, a

' driven shaft,a ratchet mechanism connecting said shafts, and means for releasing said ratchet mechanism to permit relative rotation between said shafts.

3. In a mining machine, a motor, a cable reel, and driving connections between said motor and reel includinga drive shaft rotatable in opposite directions, a driven shaft, and a ratchet mechanism connecting said shafts-whereby said driven shaft may be rotated in only one direction irrespective of the direction of-rotation of said drive shaft.

' 1. In a mining machine, a motor, a cable reel, and driving connections between said motor and reel including a drive shaft rotatable in oppositedirections, a driven shaft, a

friction clutch between said shafts, and a ratchet mechanism between said-clutch and driven shaft whereby the latter may be driven reel, and driving connections between said motor and reel including a drive shaft rotatable in opposite'directions, a driven shaft,

a friction clutch between said shafts, a ratchet mechanism between said clutch and driven shaft whereby; the latter may be driven in only one directionirrespective of the direction of rotation of said drive shaft, and means for releasing said ratchet mechanism at will topermit relative rotation between said shafts. c

6. In a mining machine, the combination with a rotatable cutter carrying head and rotation mechanism therefor, truck driving mechanism and a plural speed transmission mechanism including fast and slow speed clutches, of mechanism for alternatively applying said clutches and connecting said cutter head rotation mechanism and said truck criving' mechanism to said transmission mechanism including a common manual operating element selectively operable to perform the functions stated.

7. In a mining machine, the combination with a rotatable cutter carrying head and rotation mechanism therefor, truck driving mechanism and a plural speed transmission mechanism including fast and slow speed clutches, of mechanism for alternatively applying said clutches and connectingsaid cutter head rotation mechanism and said truck driving mechanism to said transmission mechanism including parallel shafts, and means for moving one of said shafts axially and ro-- tating the other including a common manual operating element movable to effect either function.

8. The combination with a mining machine having a cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, and mechanism for alternatively operating said clutches including a cam and lever device, said device including a rectilinearly movable cam and cooperating levers, movement of said cam in one direction effecting swing ing of one lever to applyone clutch and move ment of said cam in the opposite direction effecting swinging of another lever to apply another clutch. I T V 9. The. combination with a mining machine having cutter adjusting and propelling mechanism, of controllingmechanism therefor ineluding a plurality ofclutches, and inechanism for alternatively operating said clutches including cam and lever device. said device comprising a rectilinearly reciprocabl'e ship per member having oppositely inclined cam slots, and an operating lever for each clutch cooperating with each of said slots.

10. The combination with a mining machine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, and operating means therefor including parallel rods and a common manually operable controlling member for alternatively actuating said rods to effect application of different clutches.

11. The combination with a mining machine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, and

operating means therefor including parallel rods and a common manually operablecontrolling member for actuating said rods alternatively to effect applicationof different,

clutches, said controlling j member being adapted to move one of said rods axially to operate one clutch.

12. The combination with a mining machine having cutter adjusting and propelling mechanism, of controlling mechanism there for including a plurality of clutches, operating means for one of said clutches including a rotatable rod, and operating means for another clutch including an operatingmember reciprocably mounted on said rod and movable longitudinally thereof to effect such clutch control. d

13. The combination with a mining ma-.

chine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, operating means for certain of said clutches includ :ing a rotatable rod and an axially movable rod, and operating means for another of said clutches including an operating member reciprocably mounted on said rods.

1 1. The combination with a mining ma chine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, and mechanism for alternatively operating said clutches including a rectilinearly reciprocable' shipper member having oppositely inclined cam slots, and controlling levers cooperating respectively with said slots.

15. The combination with a mining machine having cutter adjusting andpropelling, mechanism, of controlling mechanism therefor including a plurality of clutches, a .pivoted shipper lever and mechanism for swinging said lever including an axiallymovable shaft, and means for actuating said shaft in- I cluding a screw and cooperating nut arranged coaxially therewith and relatively rotatable to effect axial movement of saidshaft.

16. The combination with a mining machine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, a pivoted shipper lever. and mechanism for swinging said lever including an axially movable shaft and means for actuating said shaft including a screw and coperating nut arranged coaxially therewith and relatively rotatable to effect axial movement of said shaft, a

manually controllable operating member, and

a releasable clutch connection between said screw and operating member. Y

17. The combination with a mining machine having cutter adjusting and'propelling mechanism, of controlling mechanism therefor including a pluralitypf clutches, and operating means therefor including concentric relatively rotatable rods,-and a cam and lever device for alternatively rotating said,

rods, said device including a lever fixed to each rod and cooperating with said c'aInQ 18. The combination with a mining ma chine having cutter adjusting and propelling mechanism, of controlling mechanism 'there& for including a plurality. or clutches, and operating mechanism therefor including co axially relatively rotatable shafts, alever fixed to each of said shafts, and a shipper.

member having inclined cam slots with which a said levers respectively cooperate for alter-.

V natively swingingthe latter.

19 ..Tlie'combination with a mining ma- 7,

chine having cutter adjusting andpropelling mechanism, of controllin. A mechanism therefor including a plurality o clutches, and

operating mechanism therefor including areciprocable shaft and a rotatable shaft, and a common manually controllable element for actuating said shafts alternatively to, effect operation of different clutches.

20. The combination with amining' ma;

chine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, and

operating mechanism therefor including parallel shafts, a toggle mechanism connectingsaid shafts, a. screw for moving one of said'shafts axially,"and a common manually controllable member for actuating said' screw to actuate one shaft and forrotating said other shaft through said toggle mechanism. 21. The combination with a mining mamechanism, of controlling mechanism therefor including a plurality of clutches certain of which are speed controlling clutches, and

operating means therefor including a plu-;

rality of interconnected shafts, and means for effectingaxial movement of one shaft to. operate one clutch and for rotating said other shaft to operate another clutch, said latter meansincluding a common" manually operable controlling element. p

-i1 o chine having cutter adjusting and propelling 1 I mechanism, of controlling mechanism there- 23.- The combination with a mining machine'having cutter plane adjusting mecha nism and propelling mechanism for the machine, of controllingmechanism therefor in- 5 eluding a plurality of clutches certain of Which arespeed controlling clutches While others control sa1d cutter plane ad usting mechanism and still others control both said -propelling mechanism and said adjusting mechanism, and operating means therefor 111- cluding a shaft, and means for rotating said shaft to operate one clutch and for reciprocat-ing sa1d shaft to' effect operation of an- 6 1 clutch.

24;. The combination with a mining ma chine having cutter adjusting and propelling mechanism, of controlling mechanism therefor including a plurality of clutches, mecha- ;ni sm for alternatively operating said clutches including a reciprocable shipper member having oppositely inclined cam slots and horizontal slots communicating with said in clined'slots, levers cooperating with said slots,

iione lever being adapted tocontrol one clutch, 5 and means for reciprocating said shipper member in one direction for swinging onelever and in the other direction to swing said;

other lever. I y

25. The combination With a mining ma-, chine having cutter adjusting and propelling for including a plurality of clutches, operating means for certain of said clutches includ- Zing a rotatable rod and an axially movable "i axially movable, of means including a common controlling element for selectively ac- I tuating said operating elements, sa1d controlling element being alternatively connectible,

to said operating elements.

' 6 27. A mining machine having truck mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plurality of dilferent planes, mechanism for positioning said cutting mechanism, truck driving mechanism for efiecting transport and cutting feed of said mining machine, transmissi'on mechanism through which said truck driving mechanism and mechanism for positioning said cutting mechanism are operable includingfast and slow speed clutches and reversing clutches, clutchesselectively operaable to effect-transmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches, and controlling mechanism for said several clutches including a common control element for controlling said fast and slow speed clutches and for also "controllingatfleast one of said other clutchesl 28. In a mining machine having truck mounted kerf cutting mechanism disposable j in and operative to cut a kerf in each of a' plurality of 'difierent planes, mechanism for positioning said cutting mechanism, truck driving mechanism for effecting transport and cutting feed of said mining machine, transmission mechanism through which said truck driving mechanism and mechanism for positioning said cutting mechanism are operable including fast andslow speed clutches and reversing clutches, clutches selectively operable to effect transmission of power to" said positioning mechanism or to said truck driving mechanism through clutches, and controlling mechanism for said several clutches including a common control element for controlling said fast and slow speed clutches and'also said reversing clutches. a t V 29. A mining machine having truck mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plurality of different planes, mechanism for positioning said cutting mechanism, truck driving mechanism for effecting transport and cutting feed of said mining machine, transmis sion mechanism through which said truck driving mechanism and mechanism for pos1- tioning said cutting mechanism are operable including fast and slow speed clutches and reversing clutches, clutches selectively oper able to effect transmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches, controlling mechanism for said several clutches including a common control element for controlling said fast and slow speed clutches and for also controlling at least one of said other clutches, and a second common control element operable to control oer tain of said other clutches,

30. In a mining machine having truck mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plurality of different planes, mechanism for positioning said cutting mechanism, truck drlvmg mechanism for effecting transport and cutting feed of sa d mining machine,

transmission mechanism through which said.

truck driving mechanism and mechanismfor positioning said cutting mechanism are oper-' able includlng'fast and slow speed clutches and reversing clutches, clutches selectively operable to effect transmission of power to said positioning mechanism or to said "truck driving mechanism through said other clutches, controlling mechanism for said several clutches including a common control elesaid other ment for controlling said fast and slow speed clutches and also said reversing clutches, and a second common control control'ele' ment operable to control the remainder of said clutches.

31. A mining machine having truck a mounted kerf cutting mechanism disposable .and reversing clutches, clutches selectively operable to effect transmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches, and controlling mechanism for said several clutches including'a common control element for controlling said fast and slow speed clutches and for also controlling at least one of said other clutches, said controlling mechanism including a plurality of shafts respectively connected with the operating devices of the fast and slow speed clutches and said other clutch, and the common control element comprising a manually operable member which is selectively movable relatively to said shafts into different operating positions in each of which it is operable to impart to one of said shafts an actuating movement to operate the respective clutch operating device.

32. In a mining machine having truck mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plu-' rality of different planes, mechanism for positioning said cutting mechanism, truck driving mechanism for effecting transport and cutting feed of said mining machine, transmission mechanism through which said truck driving mechanism and mechanism for positioning said cutting mechanism are operable including fast and slow speed clutches and reversing clutches, clutches selectively operable to effect transmission of power to said positioning mechanism or to said truck driving mechanism through said other. clutches, and controlling mechanism for said several clutches including a common control element for controllingsaid fast and slow speed clutches and also said reversing clutches, said controlling mechanism including a plurality of shafts respectively connected with the operating devices of the fast and slow speed clutches and said other clutch, and the common control element comprising a manually operable member which is selectively movable relativelyto said shafts into different operating positionsin each of which it is operable to impart to one of said shafts an actuating movement to operate the respective clutch operating device.

33. A mining machine having truck mounted kerf cutting mechanism disposable said cutting mechanism are opin andoperative to cut atkerf in each of a plurality of different planes, mechanism for positioning said cutting mechanism, truck driving mechanism for effecting transport and cutting fee-d of said mining machine,

transmission mechanism through which said truck drivmg mechanism and mechanism for positioning said cuttmg mechanism are op-t erable including fast and slow speed clutches and reversing clutches, clutches selectively operable to effect transmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches, and controlling mechanism for said several clutches including a common control element for controlling said fast and slow speed clutches and for alsocontrolling at least one of said other clutches, said controlling mechanism including a plurality of shafts arranged in adjacent parallel relationship respectively connected with the .operating devices of thefast and slow speed clutches and said other clutch, and the common control element comprising a manually operable member which is selectively movable relatively to positions in each of which it is operable to impart to one of said shafts an. actuating movement to operate the respective clutch operating device. 7 i

34. A mining machine having truck mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plurality of different planes,'mechanism for positioning said cutting mechanism, truck driving mechanism for effecting transport and cutting feed of said mining machine, trans mission mechanism through which said truck driving mechanism and mechanism for positioning said cutting mechanism are operable including fast and slow speed clutches and.

for controlling said fastand slow speed said shafts into different operating clutches and for also controlling at least one of said other clutches, said controlling mechanism including a plurality of shafts respectively connected withthe operating devices of the fast and slow speed clutches and said other clutch, and the common control element comprising a manually operable member which is selectively movable relatively to said shafts into different operatingpositions in each of which it is operable to impart to one of said shaftsan actuating movement to operate the respective clutch operating device, said operating member being operablein one position to move one of said shafts axially to operate the clutch operating device connected therewith.

mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plurality of different planes, mechanism for positioning said cutting mechanism, truck driving mechanism for effecting transport and cutting feed of saidmining machine, transmission mechanism through which said truck driving mechanism and mechanism for positioning said cutting mechanism are operable including fast and slow speed clutches and reversing clutches, clutches selectively operable to effecttransmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches, and controlling mechanism for said several clutches including a common control element for. controlling said fast andslow speed clutches and for also controlling at least one of said other clutches, said control+ ing mechanism including aplurality of shafts respectively connected with the operating de vices of the fast and slow speed clutches and said other clutch, and the common control element comprising a manually operable member-which is selectively movable relatively to said shafts into different operating positions in each of which it is operable to impart to one of said shafts an actuating movement to operate the respective clutch operating device, said operating member being operable in one position to efiect rotation of one of said shafts to operate the clutch operating device connected therewith.

- 36. A mining machine having truck mounted kerf cutting mechanism disposable in and operative to cut a kerf in each of a plurality of different planes, mechanism for positioning'said cutting mechanism, truck driving mechanism for effecting transport and cutting feed of said mining machine, transmission'mechanism through which said truck driving mechanism and mechanism for positioning said cutting mechanism are operable including fast and slow speed clutches and reversing clutches, clutches selectively operable to effect transmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches,

and controlling mechanism for said several.

clutches including a common control element for controlling said fast and slow speed clutches and for also controlling at least one of said other clutches, said controlling mechanism including a plurality of shafts respectively connected with the operating devices of the fast and slow speed clutches and said other clutch, and the common control element comprising a manually operable member which is selectively movable relatively to said shafts into different operating positions in each of which it is operable to impart to one of said shafts an actuating movement to operate the respective clutch operating device, said operatingmember being operable in one position thereof to move one of said shaftsaxially to operate the clutch operating de- 37. A mining machine having truck mounted kerf cutting mechanism disposable.

in and operative to cut a kerf in each of a plu rality of different planes, mechanism for positiomng said cutting mechanlsm, truck driving mechanism for effecting transport and cutting feed of said mining machine,transmission mechanism throughwhich said truck driving mechanism and mechanism for po-' sitioning said cutting mechanism are operable including fast and slow speed clutches and reversing clutches,- clutches selectively operable to effect transmission of power to said positioning mechanism or to said truck driving mechanism through said other clutches, and controlling mechanism for said several clutches including a common control element for controlling [said fast and slow speed clutches and for also controlling at least one of said other clutches, said controlling mechanism including a plurality of shafts respectively connected with the operating devices of the fast and slow speed clutches and said other clutch, and the com mon control element comprising a manually operable member which is selectively movable relatively to said shafts into different operating positions in each of which it is operable to impart to one of said shafts anactuating movement to operate the respective clutch operating device, said control mechanism including a toggle mechanism connecting saidsh'afts, and saidoperating member at one position thereof being operable to move oneof said shafts axially and in another position thereof to rotate said shaft to cause rotation of the other shaft throughsaid toggle mechanism. Y

88. In a mining machine, the combination with machine feeding mechanism including a speed controlling clutch and a main feed controlling clutch, of controlling means for selectively actuating said clutches including a common manual controlling element oper able to control either of said clutches and movable into different operating positions to effect application of different clutches and rotatable to efiectIcontrol of either clutch, and means for positioning said controlling element during its transition from one operating position to the other.

39. In a mining machine, the combination with machine feeding mechanism including a plurality of speed controlling clutches and a main feed controlling clutch, of controlling means for said. clutches including a common manual controlling element movable into different operating positions to effect control of different clutches and rotatable to cffect application of any of said several clutches, and means for positioning said con-- 40. In a mining machine, the combination with machine feeding mechanism including a plurality of clutches, one of which is a main' feed controlling clutch, of controlling means for said clutches including a common manner controlling element movable bodily into different operating positions plication of any clutch, and means for pos1-" t1on1ng said controlling element during its bodlly movement from one operatlng POSl-' tion to another.

41. In a mining machine, the combination-- mechanism including with'machine feeding a plurality of clutches including a main feed controlling clutch, of controlling means for selectively actuating said clutches including a common manual controlling element movtable to effect application ment during its operating position to another.

42. In a mining machine, the combination with machine feeding mechanism including a plurality of controlling clutches including, a speed controlling clutch and a main feed: controlling clutch, one clutch having a pivot-. ed applying element while another clutch has an axially movable applying element, of contion to effect application of one clutch and axially moving said clutch applying elements Z trolling means for selectively swinging and to effect application of the clutchescontrollede thereby including a common manual con-.. trolling element movable into diflerent oper-h. ating positions to effect control of different clutches, connected from said applying elements during shifting thereof from'one operating position to another, and means for guiding sai controlling element during its transition from one operating position to another.

43. In a mining machine,.the combination with machine feeding mechanism including a plurality of controlling clutches one of which is a main feed controlling clutch, of controlling means for selectively actuating said clutches mcluding a handle common to the actuation of all of said clutches and slidable bodily into one operating position to control oneclutch and into a different operating position to control a different clutch, said handle when connected to one clutch being inoperative to efiect actuation of another clutch.

44. In a mining machine, the combination with machine feeding mechanism including a plurality of speed and main feed controlling clutches, of controlling means for selectively actuating said clutches including a reciproto effect control of a different clutches and rotatable to effect ap able, controlling element movable, .into' different ling. :means for said controlling element being discable handle common to the actuation of all of said clutchesan'd shiftable "ating position to efiect control of one clutch T and into a different effect control of a different'clutch, and means operating position to for positioning :said handle during bodily shifting thereof from one opera-ting position to another.

45; In: a'mining machine, the combination with machine feedingmechanism including a plurality of speed and main feed controlling clutches, conelof said clutches having a piv oted operating element Whilethe operating element for: another clutch isaxiallyf movof means including. a .common manual operating positions .and alternatively connectible to. said operating elements for selectively sWin g and axially :moving; said operating elements to; efiectapplicationof different clutches, being disconnected from said operatingelemcnts during shifting thereof from one operating position to. another, and: means for guiding said controlling element during its said controlling element.

into one opermovementfrom one operating ,positionto an= other.

is a main feed controlling- I selectively actuating said clutches including a single handlelcommon 46; In a mining machine, the combination -with machine feeding mechanism having a plurality of controlling clutchesone of which clutch,v of control- 1 to the actuation of all of said clutchesgsaid I handle being movable intov one operating .posiinto a different operatingposition to effect application of a different clutch, said-handle to another.

withmachine feeding mechanism comprising a plurality of speed controlling clutches and a main feed controlling clutch, of controlling means for said clutches including a single p a 47. In a'mining machine, the combination handle common to the actuation of all ofsaid one operating position to another.

the combination 48. In a mining machine, with machine feeding mechanism including a speed controlling clutch and a main feed controlling clutch, of controlling means for selectively actuating said clutches including handle being movable into one said handle being entirely discon-

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