US1785958A - Mining machine - Google Patents

Description

M. P. HOLMES Dec. 23, 1930.

MINING MACHINE Filed April 2, 1926 5 Sheets Sheet' Dec. 23, 1930. M. P. HOLMES 1,785,958v

MINING mean":

4 Fild April 2. 1926 s sheets-sum 2 1/ 11/ v ITIIII 111 nec. 23,, 1930,

M. P. HOLMES MINING MACHINE Filed April 2, 1926 6 Sheets-Sheet 3 w m Z M. P. HOLMES 1,785,958

MINING MACHINE Filed April 2. 1926 6 Sheets-Sheet 4 6 Sheets-She d 5 MINING MACHINE M. P. HO LM'ES Filed 'April 2. 1926 Dec. 23, 1930.

Dec. 23, 1930. I M. P. HOLMES 1,785,958

MINING MACHINE Filed April 2, 1926 e Sheets-Sheet I e 1 1? .11. Z2 16 18 626636515 Z1 jp/ 11 21 17 16 148 150 16 22% i If 15 22 227 m mm 23 @N h I ,1 v

251, T Z98 I 53 2421s Z? 3-2621 Z50 30 Z? M1 29 Z7 51 31 04w; 4- Wm,

Patented Dec. 23, 1939 UNITED STATES- PATENT OFFICE MORRIS I. HOLMES, OF GLAREMONT, NEW HAMPSHIRE, .ASSIGNOR T0 SULLIVAN MA- CHINERY COMPANY, A CORPORATION OF MASSACHUSETTS MINING MACHINE Application filed April 2,

This invention relates to mining machines and more particularly to mining machines of the so-called universal type which are adapted to operate from the mine trackway.

u Mining machine-s of the so-called universal type are adapted to operate either as shear cutters or horizontal cutters. Such machines are usually mounted on truck wheels and are adapted to perform their cutting operations from the mine trackway. The cutter bars of such machines are usually adjustable to operate in either a vertical plane or a horizontal plane.

The primary object of this invention is to provide a mining machine of the so-called universal type wherein improved means are provided for adjusting the cutter bar into its ditlerent operating planes. Another object of this invention is to provide an improved 5:. mining machine of the so-called universal type which is of a low compact character, especially adapted to use in mines having narrow or low veins of coal. Another object of my invention is to provide an improved min- .i ing apparatus wherein improved and simplified operating mechanism for the cutting mechanism and improved propulsion mechanism are provided. A further object of this invention is to provide an improved mining a; machine of the combined horizontal and shear cutter type wherein the cutter bar may be expeditiously adjusted in a plurality of operative positions. These and other objects and advantages of my invention will, however, hereinafter more fully appear.

This invention in one of its aspects may comprise a mining machine mounted on wheels and adapted to operate while guided on a mine traclrwa-y, means being provided for adjusting the cutting mechanism of the machine to permit the bar to cut in either a vertical or a horizontal plane. More specifically, this invention may comprise a mining machine having an elongated body and a forwardly projecting pivoted cutter bar thereon, the machine body being pivoted or hinged at one side thereof and having improved means for swinging the body about its pivot to enable the cutter bar to operate in either a vertical or a horizontal plane. In a preferred 1926. Serial No. 99,264.

form the machine body is mounted on truck wheels and elevating mechanism is provided for raising the body upwardly relative to the truck wheels to vary the position of the bar during horizontal cutting. The cutting mechanism and the mechanism for driving the truck wheels are preferably both driven from a motor carried within the machine body, this motor also driving the mechanism for swinging the body about its pivot.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,-

Fig. 1 is a plan view of a complete mining machine constructed in accordance with an illustrative form of my invention, the machine being partially broken away to facilitate illustration and the cutter bar being shown in horizontal cutting position.

Fig. 2 is a side elevation view of the machine shown inFig. 1, the cutter bar and the machine body being shown in elevated position. 7

Fig. 3 is an enlarged vertical longitudinally extending sectional view through the out ting mechanism, the view being taken substantially on line 3-3 of Figs. 1 and 5.

Fig. 4. is a vertical transverse sectional view taken substantially on line 4t4 of Fig. 3.

Fig. 5 is an enlarged plan View of the forward portion of the machine shown in Fig. 1, the view being partially broken away in section to illustrate certain details of construction. r

Fig. 6 is a detail view of a portion of the cutter chain clutch controlling mechanism.

Fig. 7 is an enlarged plan view of the central feeding portion of the machineshown in Fig. 1, the view being partially broken away in section to illustrate certain details.

Fig. 8 is a detail sectional view taken substantially on line 8-8 of Fig. 7 illustrating the clamp for the elevating mechanism.

Fig. 9 is an enlarged vertical longitudinally extending sectional-view taken through a portion of the machine propulsion mechanism, the view being taken substantially on line 9-9 of Figs. 1 and 7. i

Fig. 10 is a somewha d g mmaticsec- 'ried by depending brackets or tional view illustrating the elevating and bar tilting mechanism, the mechanism being shown in a plurality of positions.

Fig. 11 is a transverse vertical sectional view taken substantially on line 1111 of Fig. 2.

1'2 a transverse vertical sectional view illusrating the mechanism for-bodily machine body about its-pivot,

n45 taken substantially online view be 12-12 of Figs. 2 and In this illustrative form of myinvention, I have shown a mining machine generally lesii aated 1 of the so-called'nn'ive sal type which comprises cutting mechanism 2,. truck driving mechanism 3, and elevating and bar tilting mechanism The cutting mechanism drivingmechanism and the truck driving mechanism are disposed within an elongated machine frame or body 5 of generally rectangular shape comprised ofthree sections, i e. a cutting mechanism carrying section 6. a motor section 7, and a section 8 housing the propulsion mechanism and the cutter bar adjustin g mechanism, the motor section 7 being interposedbetween the sections 6 and 8 to which it is rigidly secured means of spacing or bearing members 9 and 10. The hearing members 9 and 10 are provided with cylindrical longitudinally spaced bearingsurfaces 11 (see Fig. 11) disposed at one side of the machine frame and offset from the central longitudinal axis thereof and these bearing members are journaled within suitable upper and lower semi-circular bearing sleeves 12 and 1.3, the latter of which are ear- 7 supporting frame members 14 and 15 secured as by bolts 16 toparallel longitudinally extending angle frame members 17 and 18 which hold the bracketsll and 15 in rigid relation and form supports for certain other portions of the machine as hereinafter described. The upper hearing I sleeves carried within clamping members 19 carried on the bracketmembers 14 and 15 and which are-adapted to'be held in clamping position by suitable adjustable screws 21. These clamping members are adapted to maintain the machine body in any adjusted position about its hinge relative to the frame members 14 and 15. Dowel pins 22 are provided for preventing disi'ilacen'ient of the upper bearingsleeves. As illustrated. the frame members 14 and l5 -are provided h horizontally disposed transverse 'li terally spaced bores 23 formed within suit-able clamping members and within which bores sleeve members 24 are inserted forming boa"- ingsfor parallel supporting arms 25 and '26 in turn carrying anysuitable roller bearings 27 and axles 28 and 29 journal'ed therein. The outer ends of these axles'have secm edthereto by suitable nut and washer connections 30. truck wheels 31 held in suitable spaced relation'by means of spacing sleeves 32, the

arms 25 and 26 and wheels 31 constituting the supporting means for the machine.

In specifically describing the cutting mechanism, generally designated 2, it will herein be noted that housed within the motor section? is a suitabledriving motor 35, here- 'in preferably ofthe usual reversible electric type, having a longitudinally extending hori- .zontal.armatnreshaft 36.journaled at itsforward end within a suitable ball bearing 3. (Fig. 3) carried by a motor head member 38 -snilably secured within a bore 39 formed hollow shaft 40 and engages a threaded reduced portion 15 formed onthe armature shaftflo, thusholding the shafts 4-0 and 36 in rigid operative relation. The shaftll has fornicdthereon at itsforward end, infront of the bearing 41, a:suitabletoothedclutch member 46. As illustrated, the clutch-member 46 is internally bored, as at*4.7, to'receive a suitable ball bearing48 within which, and a bcaring49 carried by'the frame section (3, :1 stub shaft '50 is journ-aled, this shaft being disposed coaxially with shafts 10 and 36. The shaft 50 has formed'thereon a'toothed clutch member 51 disposed coaxially with the clutch member 46, which clutch member51 is adapted to be connected in driving relation with the clutch member lti'by means of an internal coaxial shipper gear clutch 52 formed on a flanged shipper member The shlpper member 53 is adapted to be actuated longitudinally of the shaft 50 by means of a shipper yoke 54 preferably in'the form of a bell crank pivoted, as at 55 (Figs. 4 and 5), on a vertical axiswithin the machine frame and this bell crank is provided with radial arms and 57 adapted to coopcratewith the shipper member 53 and a bifurcated and slotted member 58, rcsliiectively. The slots in the bifurcated member 58 are adapted to engage the opposite ends of a vertical pin carried by-t-he arm 57 and the member'58 is suitably carried by a cylindrical member (ll) slidab lyinounte-d'within a sleeve 61in turn mounted withina'transverselydisposed bore 62 formed. in the .side of the frame section 6. Moreover, the sleeve lil'has secured thereto. as by radially extending studs 63, an operating member or grasping portion Stand. one of the studs is providedwith an'inwardly projecting pin adapted to cooperate with a cam slot- 65jf0rme-d withinthe member 60.

"Furthermore, the member, is provided with an upstanding nortion.-66having secured, as at 67, at-its upper end a transversely disposed rod 68 which is, in turn, secured at its opposite end within a cylindrical member 69 similar to the member 60 and likewise provided with an operating portion 7 O disposed at the opposite side of the machine frame from the portion 60 thus enabling the operator to actuate the clutch from either side of the machine.

As illustrated, the shaft 50 has formed thereon a bevel pinion 71 which meshes with a bevel gear 72 rotatable on an axis perpendicular to the axis of the armature shaft and the gear 72 is iournaled in suitable spaced be. rin 7 3 carried within the machine frame. The bevel gear 72 has formedthereon a spur pinio p 7 i wiich meshes with a large spur r in. i'he gear 75 1s provlded with an an nular depending sleeve or hub portion 7 6 journaled on spaced bearings 77 surrounding and disposed coaxially with a cut chain driving shaft 78 disposed on an axis parallel with the axis of the gear 7 1 and journaled at its op aosite ends within suitable ball bearings 79 and 80, the former of which are carried within a port on of the frame section 6 while the latter disposed within a bore 81. formed within a circular bearing portion 82 formed integral with the cutter bar 88. The shaft 78 has secured thereto at one end, as by a suitable key and a radially expanding split washer connection 84-, a cutter chain driving sprocket 85, of a well known form. which is adapted to be driven through suit able clutch connections, hereinafter described, by the motor driven gear 7 5. A cut ter bit carrying cutter chain 86 is adapted to be circulated about the outer edges of the cutter bar 88 and is driven by the sprocket in the usual manner. As illustrated, a resiliently positioned annular packing ring 87 is disposed between the cylindrical portion 82 and the sprocket 85 and this member 87 prevents the entry of any foreign substance and thus prevents damage to and excessive wear of the n'loving parts of the machine. The circular bearing portion 82 of the cutter bar is disposed within suitable spaced alined cylindrical bearingsleeves 88 supported by an an nular portion 89 of the machine frame and has secured thereto, by a radially expanding split washer connection 90 an annular bearing men'iber 91 which receives the thrust of the cutter bar. As shown in Fig. 8, he clutch for connecting the gear 75 and the sprocket 85 in driving relation comprises a clutch member 92 keyed to the shaft 78, intermediate its ends, and a clutch member 98 held in operative relation with the gear 75 by means of a semi-permanent clutch 98, and the clutch member 98 is journaled upon bearing sleeve 91 surrounding the shaft 78. These irlutch members 92 and 98 are adapted to be connected in operative driving relation by means of a sliding internal gear clutch 95 formed .on a flanged shipper member 96. As illustrated, the shipper member 96 is adapted to be reciprocated longitudinally of the shaft 78 by means of a shipper yoke 96 carried on a shaft 97 journaled within laterally spaced bearing members 98 suitably secured to a portion of the machine frame 6. One end of the shaft 97 has secured thereto an arm or lever 99 provided with a slot-ted end portion 100 (see Figs. 5 and 6) which cooperates with a crank 101 secured to a shaft 102 journaled within the frame section 6 and which has socured thereto an operating lever 103 which is adapted to be held in its different positions by means of a manually operable spring pressed plunger or look 10 1-. It will thus be evident that by suitably manipulating the lever 103 the clutch member 93 may be shifted axially in either direction and consequently the gear 75 and the sprocket 85 driven by the motor 35 may be connected in driving relation or the drive may be interrupted, thus permitting the cutter chain to be rotated or remain idle at the will of the operator.

In the cutter bar swinging mechanism it vill herein be observed that the cutter bar 85 is adapted to be swung or slued about its pivot through suitable mechanism hereinafter described of the same general type as that disclosed in my copending application, Serial No. ($9 1,139, filed Feb. 20, 192 1, at a slow cutting speed in one direction bar at a fast or positioning speed in the opposite direction. in specifically describing the slow cutting speed driving mechanism it will be noted that the gear 75 is meshed with a spur pinion 105 which has secured thereto a worm 106 having teeth of slight lead and which meshes with a worm gear 107. The worm gear 107 has keyed thereto, as at 108, an annular member 109 journaled on a ball bearing 110 carried by the frame section 6. A friction clutch, generally designated 111, is disposed within the worm gear 107 and this clutch comprises interleaved friction discs of usual form, certain of which are carried by the member 109 while others are carried by a spider member 112 suitably keyed to one end of a transversely disposed shaft 113 journaled within suitable sets of spaced alined bearings 11 1 suitably carried by the machine frame. A plate member 115 is provided for applying pressure to the friction discs and this member is provided with a central bore 116 within which a coiled spring 117 is disposed adapted to react on a washer 118 engaging the member 115 and the hub of a hand wheel or operating member 119, respectively. The hand wheel 119 is suitably secured to a transversely disposed coaxial threaded operating shaft 120 disposed transversely through and thr ided Within the shaft 113. It will thus be evident that the load of the pressure applied by the hand wheel 119 is transmitted through and is limited by the coiled spring 117, thereby preventing excessive strain being applied to the driving mechanism and the motor, for instance, when extremely hard material is encountered by the cuttting mechanism. In this instance, a worm 121 is keyed, as at 122. to the shaft 113 intermediate its ends and this worm is meshed with a worm gear 123 bolted at 124: to an annular hub 125 keved at 126 to a shaft 127 disposed parallel with and in front of the shaft 78. The shaft is journaled in. suitable spaced alined herring? .128 at its ends and is held in position by a suitable radially expanding split washer 129. T he sha ft 127 has formed thereon a spur pinion 130 which meshes with a large spur gear (or circular external gear) 131 bolterl. as at 13;, to a cutter chain housing or m rd portion 133 formed on the cutter bar 83, Furthermore, it will be observed that the gear 131 is inter ally grooved, as at 131, within which groove a guide plate 135 )rojects, the plate being suitably rigidly secured. as by bolts 130, to the frame section 6. From the foregoing description it will be evident t hen the friction clutch 111 is not appliee power will. be transmitted from the motor through pinion 71, gear 72, pinion 74;, gear 75, spur pinion 105, worm 106, worm gear 107, spider 112, shaft 118, worm 121, worm gear 123, spur pinion 130, which rotates the circular gear 131 thereby swinging the cutter bar about its pivot in a counter clockwise direction, as viewed in Fig. 5, at a slow or cutting speed. It will also be evi dent that by varying the pressure applied to the clutch discs any suitable variants of such speed may be obtained. Referring; particularly to the fast speed bar swinging mechaism it will. herein benoted that a pinion 137 meshes with spur 75, which pinion is oppositely spaced relative to the gear 105 and t i res i-ect to the axis of the gear 75. The

wi pin 37 his secured thereto and rotatable a .vorm 138, having threads of steeier lead than the threads of the worm 106, and this worn'i 138 meshes with a worm gear 130 arranged coaxially with the gear 107 and driven through a friction clutch, not shown, similar to the clutch 111 and operated by appropriate longitudinal movement of shaft 120 which has at its other end from wheel 119 another hand wheel or operating n'ieniber 140 and this worm gear 139 is adapted to drive, through the friction clutch, the worm 121 keyed to the shaft 113. From the fore any; description it will be evident that when the clutch connecting); the worm gear 139 in driving relation with the worm 121 is applied. and the clutch 111 is released power will be transmitted from the motor 35 through the feed driving mechanism any suitable variants of such speed may be obtained. Due to the single operating shaft 120 both clutches can not be loaded at once.

1n specifically describing the feeding or propulsion mechanism it will herein be noted that the rear end of the armature shaft PM is journaled in a suitable ball bearing 14-7 carried within a suitable head member 14% and this shaft has secured thereto by a bolt connection 149 a clutch element 150 provided with internal clutch teeth adapted to engage etrternal teeth 151 formed on a longitudinally extending shaft 152 disposed coaxially with the armature shaft and which is in turn journaled at its rear end in a bearing 153 suitably carried by the spacing or bearng member 10. The rear end of the shaft has suitably secured thereto a pinion 15-1 which is a 0.2 pted to drive the trncl: Wheels 31 through improved transmission mechanism to be hereinafter described. including transmission gearing and contri'illing clutches sill.- stantially similar to those described in my ('o pending: application Ser. No. 757,031. filed Dec. 19, 1024, at a slow speed in one direction or at a fast speed in a reverse direction. In specifically considering the fast feed mechanism it will be noted that the pinion 154;

9) meshes with a spur gear 15:") suitably iournaied within the frame section b, which rear 155 has secured thereto and lo tatable therewith a spur pinion 157 which in turn meshes with a. larger internal gear The hub 159 of the gear 158 is herein also journaled on a suitable bearing sleeve 160 on a sleeve clutch member 161 keyed, as at 162, to a longitudinally disposed horizontal. main feed driving or transmission shaft 163 journaled at its omvosite ends in suitable alincd rings 154: and1 $5 carried ithin the frame section 8. Moreover, it will be noted that the member 161 ferries a series of friction discs 166 which are interleaved with a corresponding; series of discs 167 carried by the sleeve of the internal gear. As shown, the sleeve on the into. :11 gear is also provided with aplurality of radially located longitudinally extending slots 168 receiving radial fingers 160 on an interlocking .men'iber 170 keyed to the hub of a pini n 171 freely rotatable on the shaft 163. Between flitFG lingers 169 are, friction clutch operating fingers 172 carried by a cyl ndrical plane member 173 disposed cowith the hill.) of the gear 8. hes? tinge 1'72 extend longitudinally into contact wi h one of the friction discs 166, 167. As

shown. t cured their a and 18.

'tudinally extending horizontal shaft 179.

The shaft 179 is suitably journaled at its forward end within a ball bearing 180 carried within a head member 181 and ournaled at its rear end within a ball bearing 182 supported on the rear end of the shaft 163. As shown, secured to the rear end of the shaft 179 as by a key and bolt connection is a spur pinion 183 which meshes with an intermediate idler gear 184 journaled on a stud 184 threadedly connected to the frame section 8. This idler gear 184 meshes with a spur gear 185 keyed to a longitudinally extending horizontal shaft 185 disposed parallel with the shaft 179 and alined with the axis of swinging movement of the machine frame. The shaft 185 is journaled at its forward end in ball bearings carried by the frame section 8 while the rear end of this shaft is journaled within longitudinally spaced ball bearings 186 disposed within a bracket 187 secured as by screws 187 to a gear housing member 188, the latter being suitably secured at its opposite ends to the angle frame members 17 The rear end of the shaft 185 has secured thereto as by a suitable key 188 a bevel gear 189. It will thus be noted that the rotation of the armature shaft 36 may be transmitted to the pinion 154, gear 155, pmion 157, internal gear 158, friction clutch discs 166, 167, clutch member 161, shaft 163, pinion 175, gear 17 6, pinion 177, internal gear 178, the shaft 179, pinion 183, idler gear 184, gear 185, and the shaft 185 to the bevel gear 189 to rotate the latter at a predetermined high or fast speed whenever the clutch controlling member 173 is operated to connect the clutch. It will here further be evident that the speed of such feed may be lowered at will by slipping the friction discs 166, 167. Referring specifically to the slow or cutting feed it will be noted that when the clutch controlling member 173 is in inoperative position and the clutch is released power will still be transmitted through the interlocking member 170 to the pinion 171 which is freely rotatable on the shaft 163. This pinion in turn meshes with a gear 190 disposed coaxially with the gear 176 and this gear has secured thereto and rotatable therewith a pinion 191 which meshes w th a spur gear 192 disposed coa-Xially with and rotatable on the shaft 163. This gear 192 has secured thereto a spur pinion 193 which meshes with a spur gear 194 disposed coaxially with the gear 190 and thisgear drives a spur pinion 195 which meshes with an internal gear 196 substantially similar to the internal gear 158. The internal gear 196 also houses a friction clutch substantially similar to the clutch heretofore described in connection with the clutch discs 166, 167 andthis.

clutch includes interleaved clutch discs 197, 198 certain of which are carried on a clutch member 199 keyed, as at 200, to the shaft 163,

while others are carried by a sleeve formed on the internal gear 196. In this instance a clutch retaining member 201 is provided keyed, as at 202, to the hub of the spur pinion 17 5 and this clutch member in this in-. stance has no interlocking function and is only a disc retaining member. A plane clutch operating member 203 surrounds the hub of the clutch member 201 and is provided with longitudinally extending lingers 204 which are adapted to engage one set of the friction discs 197, 198. As a result of this mechanism above described although the clutch 166, 167 is disconnected rotation will constantly be imparted through the pinion 171, gear 190, pinion 191, gear 192, pinion 193, gear 194, pinion 195, internal gear 196, clutch discs 197 198, clutch member 199, pinion 175, gear 176, pinion 177, internal gear 178, the shaft 179, pinion 183, idler gear 184, gear 185, and the shaft 185 so that when the clutch 197 198 is connected the bevel gear 189 will be rotated at a slow or cutting speed in an opposite or reverse direction from the fast speed previously described. Here it will also be evident that by slipping the friction discs 197, 198 this speed may also be reduced when desired. Operatively associated with the feeding mechanism above described are pivoted clutch shipper members 205 and 206 (see Fig. 7) each provided with a yoke carrying suitable rollers 207 which are adapted to engage the plane surfaces of the clutch operating members 173 and 203 respectively. These shipper members are also each provided with an arm 208 engageable with parallel rods 209, but one of which is shown, suitably guided within the machine frame. These rods are threaded and are engageable at their rear ends with a suitable nut (not shown) secured toa hand wheel 210 as clearly described in my copending application Ser. No. 757,031. Rotation of the hand wheel 210 causes the rods 209 to move simultaneously in opposite directions, thus causing one of the friction mechanisms to be released while the other is applied, thereby preventing simultaneous application of two speeds, i. e. the fast and the slow speeds. As this clutch controlling mechanism does not specifically enter into this in vention further detailed description and illustration of the same is deemed unnecessary.

As illustrated, the bevel gear 189 of the propulsion mechanism is meshed witlireverse bevels 211 and 212 freely rotatable upon hearing sleeves 213 carried by a transversely disposed truck driving shaft 214. The hubs of the'gears 211 and 212 are disposed adjacent one another and have formed thereon gear clutch teeth215, 216 adapted to be selectively connected by an internal shipper gear or clutch member 217 with a spur gear 218 suitably secured to the shaft 214. A shipper yoke 219 engages the gear clutch member 217 and is secured to a vertical shaft 220 suitably jouriii) naled on the gear housing 188. his shafthas secured thereto at itsupper end an operating lever 221. It will thus be evident that by selectively throwing the shipper gear in opposite directions into operative engagement with either of the gears 211 or 212 the shaft 214 will be driven in opposite directions by the gear 189 at either a fast or at a slow speed. The shaft 21% is journaled within tne bracket 188 within suitable ball bearings 222 disposed adjacent the remote ends of the gears 211, 212 respectively, and in suitable roller bearings 223 disposed adjacent its ends, and one end of this shaft has secured thereto by a bolt and. washer connection a large sprocket 225. The sprocket 225 is connected by a chain connection 226 with asprocket 22? secured to atransversely disposed shaft 228 disposed coaxially with the sleeves 2i and jour aled in coaxial roller bearings 229 adjacent its ends, the l earings 229 being suitably carried in a bore 230 formed in each of the supporting arms 26. The opposite end of the shaft 228 fronrthe sprocket 227 has securedthereto, as by a bolt and washer and key connection 231, a sprocket which is connected through a chain connection 233 with a sprocket 23 i suitably secured to a shaft 285 disposed parallel with the shaft 228. The shafts 228 and 235 are conne :ted in on erative driving relation with the truck who is 31 carried by the axles 28 and 29, respectively, by gears 236 keyed to the shafts as at 23?, and which mesh with intermediate idler gears 238 freely rotatable upon a bearing sleeve 239 carried by studs 2&0 suitably carried by the arms 25 and 26, respectively. These inter mediate gears 238 mesh with spur gears 241 keyed, as at 242, to the axles 28 and 29 respectively. From the foregoing description it will be evident that the truck wheels 31 may be driven from the gear 189' ateither a fast or a slow speed in opposite directions at the will of the operator. As illustrated, the truck driving shaft 21% has secured thereto, as by a key 2413, an annular sleeve 2-i4which in turn has keyed thereto a brake member 245 having a peripheral groove 246 with which a brake band 24? is adapted to cooperate. The brake band 247 is provided with a suitable operating lever 24:8 disposed at the side of the machine frame (see Fig. 1). This brake is adapted to control the rotation of the shaft 21% during certain operations of the machine and for controlling truck movement wnile moving relative to track way of a steep gradient in a well known manner.

Associated with the machine propulsion mechanism is improved mechanism for bodily swinging the machine frame and consequently the cutter bar 83 about the offset bearing surfaces 11 formed within the spacing or hearing members 9 and 10. Slidably mounted upon the shaft 185 in non-rotatable relationtherewith is a gear 249 keyed,

as at 250, to the shaft and provided at its rear end with a flanged portion 251 ith which a shipper yoke 252 cooperates. The yoke 252 is secured to a shaft 253 and has cured thereto at one end a suitable controlling lever This sliding gear 219 is adapted to connect a larger spur gear in operative driving relation with the transmission shaft 185 and this gear 255 meshes with an arcuate rack 256 formed on a bracket 257 secured, as by bolts 258 to the angle members 17 and 18. Gear 255 is journaled on a shaft 255 supported by cars 255 rigid with the frame 8. It will thus be evident that when the gear 155 is connected in driving relation with the shaft 185 by the slidin gear 249 power will be transmitted selectively through the fast or slow feeding n'iechanism thus causing the gear 255 to react upon the rack 256 and bodily swinging the machine about its pivot or hinge into a vertical plane as indicated by dotted lines in F 12 or in any intermediate plane between vertical and horizontal, thus enabling the bar to be swung from the horizontal position shown in Figs. 1 and 2 to a vertical position and enabling the machine to operate as either a shear cutter or a hori zontal cutter.

Mechanism is provided for raising and lowering the machine frame upwardly and downwardly and such means comprises arcuate worm gear racks 259 and 260 secured. as by bolts 261 (Fig. 11) 7 to arms 262 and 26 :5 secured to the parallel arms 25 and 26 spectively, and these racks are meshed with worms 264 and 265 (see Fig. respectively, having threads of opposite lead which are formed upon a longitudinally disposed slidable shaft 266 suitably mounted at its ends within members 267 and suitably carried by the angle member 18. The rear end of this shaft 266 is provided with vertically disposed rack teeth 268 which mesh with a spur gear 269 (see Figs. 7 and 10) journaled upon a bearing sleeve 270 carried by the transverse shaft 214. This gear 269 is provided with a sleeve portion having clutch teeth 271 formed thereon which are adapted to be connected to clutch teeth 272 formed upon the sleeve 214 by means of an internal shipper clutch The shipper clutch 278 is adapted to be actuated by means of a shipper yoke 274 socured to a vertical shaft 215 which has secured thereto, at its upper end, an actuating lever 276 (see Fig. 1). It will thus be evident that when the shaft 214 is connected in driving relation with the motor 85 and when the clutch teeth 271 are connected in operative driving relation the gear 269 will be rotated thus causing the teeth thereon to react on the rack teeth 268 forcing the shaft 266 forwardly, thus causing the racks 259 and 260 to swing about the shafts 228 and 235 as pivots and causing the arms and 26 to swing about the wheel carrying axles 28 and llu ita

29 and thus varying the elevation of the machine frame and cutter bar as desired as indicated by the upper dotted line position shown in Fig. 10.

Associated with the elevating mechanism is mechanism for tilting the cutter bar and this mechanism comprises a plurality of circumferentially longitudinally spaced apertures 277 in shaft 266 within which a suitable lever or wrench, not shown, is adapted to be inserted, thereby enabling the operator to bodily rotate the shaft 266, thus causing the oppositely threaded worms 264 and 265 to swing the racks 259, 260 in opposite directions, tilting the machine frame as indicated by the intermediate dotted line position shown in Fig. 10, the clutch member 273 controlling the gear 269 being thrown out at this time. A friction clamping device (Fig. 8), generally designated 278, is provided, preventing sliding of the shaft 266 after the tilting operation is completed and this clamping device comprises a split clamp 279 secured, as by screws 280, to the angle member 18 and the clamp 279 is. adapted to be operated by a bolt 281 pivoted thereto, as at 282, and having at its opposite end a screw and nut connection 283 for applying pressure to the clamp. It will also be noted that suitable sleeves 284 are provided for housing portions of the shaft 266 thereby preventing access of any foreign substance to the worms 264 and 265 or rack As illustrated, electric current is adapted to be conducted to the electric driving motor through a suitable conductor cable 285 connected to a suitable cable reel 286 journaled, as at 287, upon a bracket member 288 suitably bolted to the angle members 17 and 18. The cable reel 285 is adapted to be driven from the truck driving shaft 214 by means of a suitable grooved pulley 289 suitably secured to a sleeve 290 keyed to the shaft and a. belt 291 cooperates with this pulley and 5; with a pulley 292 suitably secured to and rotatable with the reel, thus enabling the reel to be driven by truck movement at any speed thereof. An adjustable idler pulley 293 is rotatably mounted on a pivoted arm 294. The arm 29 1 (see Figs. 1 and 7) is in turn secured to a transversely disposed horizontal shaft 295 provided at its outer end with an operating lever 296 disposed adjacent one side of the machine. A suitable spring pressed plunger 297 is provided which is adapted to cooperate with teeth formed on a usual ratchet member 298 thereby holding the lever in its adjusted positions. It will be evident that the operator may vary the tension upon the belt 291 as desired, consequently varying the speed of rotation of the reel 286. Suitable angularly disposed guiding rolls 299 are provided at the rear of the reel 286 for guiding the cable 285 as it is I wound in or paid out by the reel.

tated, causing the worm racks 259,

The general mode of operation of the ma chine will now be described. It will be assumed that the machine is running about the mine along tracks in the entry at a fast or transport speed under the control of the friction clutch 166, 167 and when the working face of the coal is reached the fast feed clutch is then released. If an undercut is desired to be made the clutch 58 is connected and the operator then manipulates the hand wheel 140 controlling the first bar swinging friction and the bar is swung or slued about its pivot at a fast feed to a point adjacent the right hand rib. The clutch member 96 is thrown into operative driving relation and the cutter chain sprocket is then actuated through transmission means from the motor. The fast feed friction is then released and the slow feed clutch 197, 198 is thrown in and the bar sumped or fed into the coal at a slow or cutting speed. When the sumping cut is completed the slow truck feed clutch is then thrown out and the brake band 247 set, thus preventing rotation of the truck wheels and the hand wheel 119 is then manipulated to effect application of the clutch 111 and as a result the cutter bar is swung transversely in its plane to effect the swinging cut, the slow bar swinging clutch 111 thereafter being released. The band 247 controlling rotation of the truck wheels is then released and the operator throws the gear clutch element 217 into driving relation with the other reverse gear and the slow truck feed friction 197, 198 is applied and the bar withdrawn from the coal at a cutting speed, in a well known manner. If it is desired to make a shear or vertical cut the sliding gear member 24-9 is thrown into mesh with the gear 255 and the machine and cutter bar bodily swung into a vertical position about its pivot, the clamps 19 being released at this time. The clamps 19 are then again tightened, holding the machine frame in non-rotative position and the bar is then swung upwardly about its pivot at a fast feed to apoint adjacent the mine roof and the bar sumped into the coal at a cutting speed and then swung downwardly about its pivot at a slow speed to the bottom of the mine and the bar withdrawn from the coal in a manner substantially similar to that above described in regard to the horizontal out. If it is desired to vary the elevation of the bar and the machine frame the clutch element 273 is thrown in operative driving relation with the gear member 27 2 secured to the truck driving shaft 214 and the gear 269 is rotated, thus sliding I the shaft 266 and swinging the racks 259, 260 and consequently the machine frame upwardly to any elevation desired. If it is desired to tilt the bar the clutch member is thrown out and a suitable bar or wrench is inserted into the apertures 277 in the shaft 266 and the shaft ro- 260 to be or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a mining machine, in combination, a truck, a motor thereon having a. casing hinged at one side thereof to swing about an axis extending longitudinally of said truclz and disposed parallel with the longi tudinal axis of said motor, cutting mechanism driven by said motor and carried by said casing, said cutting mechanism including a plane kerf cutter, and means for swinging said casing about its hinge to change the plane of cut of said kerf cutter.

In a mining machine, in combination, supporting means, a machine body thereon hinged at one side thereof to swing about an axis extending longitudinally of said supporting means and disposed parallel with the central longitudinal axis of said body, cut ting mechanisn'i carried by the forward end of said machine body incuuling a plane kerf cutter adapted to cut a plane kerf, and means for swinging said body about its hinge to position said lierf cater to cut kerfs in a plurality of intersecting planes in advance of said supporting mea is In a mini: n

o supporting means, a machi.

i 1 combination, body hingedly s l JV i a tera t ed es means. lrerf by the forward end said machine body including a plane cutcarrying cutter bar, and means for swinging said body about its hinge to position iid cutter bar to cut kerfs in a plurality of tersecting planes in advance of said sup orting means.

4. In mining machine, in combination, supporting means, a machine body hmget thereon at one lateral edge thereof to bodily in an arcuate patl'i from a horizontal position into a vertical position, cuttiag mechanism carried by the forward end of said. machine body including a plane cutter carrying cutter bar, means for swinging saic body about its hinge to position said cutter bar to cut lrerfs in a plurality of intersecting planes in advance of said supporting means.

5. In a mining machine, in combination,

by said machine body, means for swinging said machine body about its hinge, and means for elevating said supporting means to change the elevation of said body while its relation with respect to its pivot remains unchanged.

6. In a miningmachine, in combination, supporting means, a machine bo y therein. hinged to s viug' at one lateral edge thereof about an axis extending longitiulinally of l supporting means and d posed parallel with the longitudinal axis of said body. cuitinp; mechanism carried by said machine body includi'; a plane herf cutter, means for swinging Id machine body about its hingz'e to change the plane ofcut of said kerf cutter, and means t vary the angle of said suppor ing means to tilt Said cutting mechanism about a transverse axis.

7. In a mining machine, in combination. Wlltltittl srpporting means, a machine body thereon hinged to s ring about an axis extending: long," idinally of said supporti -osed parallel with the loa means and d.

tndinal. axis of said body, cutting mechanism carried by said machine body, m ans for swinging sait machine body about its hinge. and means to vary the ele ation and angle of said supporting means to change the elevation of said cutting mechanism and to tilt said cutting. mechanism about a transverse axis.

8. In a mining machine, a. wheeled sup- I frame, a machine frame thereon ateral edge thereof to swing a 1 axis parallel with the longitudinal v of said machine frame, said machine frame carrying a driving moto and ariablc speed transmission mechanism, means for swin ing said ma hine frame bodily in an arcuate path about its hinge, and means for propelling said wheeled simportiug frame from said motor through said trm'lsmission mechanism.

9. In a mining machine, a wheeled sup porting frame, a machine frame thereon hinget at one lateral edge thereof to swing about an axis pa 'allel with the longitudinal axis of said machine frame, a motor -arried by said nn chine frame, means driven by said motor for swinging said machine frame bodily in a1 arcuate pat-h about its hinge, and means for propelling said wheeled support ing frame along a trackway.

10, In a mining machine, a wheeled supporting frame, machine frame thereon hinged at one lateral edge thereof to swine about an axis parallel with the longitudina axis of said machine frame, means for swinging said machine frame bodily in an arcuate patn about its hinge, and power operated lea means carried by said machine frame for propelling said wheeled supporting frame along a tracliway irrespective of the position of said machine frame relative to said supporting frame. I c

11. In a mining machine, a wheeled supportin frame, a machine frame thereon hinged at one iateral edge thereof to swing about an axis parallel to the longitudinal axis of said machine frame, said machine frame carrying driving motor and variable speed transmission mechanism, means for swinging said machine frame bodilyin an arcuate path about its hinge, and means for propelling said wheeled supporting frame from said motor through said transmission mechanism irrespective of the position 'of said machine frame relative to said supporting frame.

12. In a mining machine, a. wheeled supporting frame, a machine frame thereon hinged at one lateral edge thereof to swing I about an axis parallel with the longitudinal axis of said machine frame, cutting mechanism carried by said machine frame, power operated means carried by said machine frame for swinging said machine frame bodily in an arcuate path about its hinge, and means for propelling said wheeled supporting frame alonga trackway.

13. In a mining machine,-a Wheeled supporting frame, a machine frame thereon hinged at one lateral edge thereof to swing about an axis parallel with the longitudinal axis of said machine frame, said machine frame carrying a driving motor and variable speed transmission mechanism, cutting mechanism carried by said machine frame,

means for swinging said machine frame bodily in an arcuate path about its hinge, and means for propelling said wheeled supporting frame along a traclrw'ay driven from said motor through said transmission mechanism.

14. In a mining machine, supporting means, a machine body thereon hinged at one side thereof to swing about an axis offset from the longitudinal axis of said body, lrerf cutting mechanism carried by saidmachine body including a plane cutter carrying cutter bar, means for swinging said body about its hinge to change the plane of out of said cutterbar, and means for swinging said cutter bar about its pivot in any position of said body about its hinge to cut kerfs in a plurality of intersecting planes.

15. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis offset from the longitudinal axis of said body, kerf cutting mechanism carried by said machine body includlng a cutter carrying cutter bar movable relative thereto, means for swinging said body about 1ts hinge, means I01 swlnglng said cutter bar about its pivot in any position of said body about its hinge to cut kerfs in a from the longitudinal axis of said body, outting mechanism carried by said machine body, means for swinging said body about its hinge, and'means to vary the angle of said supporting means to tilt said cutting mechanism about a transverse axis. v

17. In a mining machine, n combinatlon,

wheeled supporting means, a machine body thereon hinged to swing. about an axis parallel with and offset from the longitudinal axis'of said body, cutting mechanism carried by said machine body, means for swinging saidbody about its hinge, and means to vary the elevation and the angle of said supporting means to change the elevation of said cutting mechanism and to tilt said cutting mechanism about a transverse axis.

18. In a mining machine, a wheeled supporting frame, a machine frame. thereon hinged to swing about an axis offset from the longitudinal axis of said last mentioned frame, said machine frame carrying a driving motor, cutting mechanism carried by said frame, means driven by said motor for swinging said machine frame about its hinge, and means driven by said motor for propelling said wheeled supporting frame along a trackway.

19. In a mining machine, a wheeled supporting frame, a machine frame thereon hinged to swing about an axis offset from the longitudinal axis of said last mentioned frame, said machine frame carrying a driving motor and variable speed transmission mechanism, cutting mechanism carried by said frame, means driven by said motor through said transmission mechanism for swinging said machine frame about its hinge, and means driven by said motor for propelling said wheeled supporting frame along a trackway.

20. In a mining machine, a wheeled supporting frame, a machine frame thereon hinged to swing about an axis offset from the longitudinal axis of said supporting frame, said machine frame carrying a driving motor, cutting mechanism carried by said machine frame, means driven by said motor for swinging said. machine frame about its hinge, and means driven by said motor for propelling said wheeled support along a trackway irrespective of the position of said machine frame relative to said supporting frame.

21. In a mining machine, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally carrying a motor and fast and slow speed transmission mechanism, cutting mechanism carried by said body, and means driven by said motor through said transmission mechanism for swinging said body about its hinge.

22. In the mining machine, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and ollset from the longitudinal axis of said body, said body carrying a motor, cutting mechanism car ied by said body, and means driven by said motor for swinging said body about its hinge operative irrespective of the position of said body relative to said supporting means.

23. In a mining machine, a truck, a machine bodyv thereon hinged to swing about an axis offset from the longitudinal axis of said body, said body carrying a motor, cutting mechanism driven by said motor and carried by said body, and truck driving mechanism including a plurality of friction clutches operatively connected to said motor.

2%. In a mining machine, a truck, a machine body thereon hinged to swing about an axis oiiset from the longitudinal axis of said body, said body carryin a motor, cutting mechanism driven by said motor and carried by said body, truck driving mechanism including a plurality of friction clutches operatively connected to said motor, and means for swinging said body about its hinge operatively connectible to said truck driving mechanism and controlled by said clutches.

25. In a mining machine, a wheeled truck, a motor thereon having a casing hinged to swing about an axis extending longitudinally of said truck and oiiset from the longitudinal xis of said motor, cutting mechanism supported by said casing, and means driven by said motor for swinging said casing about its hinge to vary the position of said cutting mechanism.

26. In a mining mac iine, a wheeled truck, a motor thereon having a casing hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism su )POItGCl by said motor casing, means for elevating said casing relative to the truck wheels, and truck driving mechanism operatively connectible to said motor.

27. In a mining machine, a wheeled truck, a motor thereon having a casing hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing, means for elevating said casing relative to the truck wheels, truck driving mechanism operatively connectible to said motor, and means for swinging said casing about its hinge operatively connectible to said truck driving mechanism.

28. In a mining machine, a wheeled truck, a motor thereon having a casing hinged to swing about an axis offset from the longi tudinal axis of said motor, cutting mechanism supported by said casing, means for elevating said casing relative to the truck wheels, and truck driving mechanism operatively connectible to said motor irrespective of the position of said casing relative to said truck.

29. In a mining machine, in combination, a motor, a support rectilinearly movable towards and from a working face during the cutting operation of the machine, a motor casing in which sail motor is disposed hinged at one lateral edge thereof on said support to swing about an axis parallel to the direction of rectilinear movement of said support during cutting and offset from the motor axis, means for elevating said casing while its relation with respect to its pivotal axis remains unchanged, and cutting mecha nism carried by said casing and swingable and elevatable therewith.

30. In a mining machine, a wheeled support, a motor casing on said support hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing, driving connections between said motor and the wheels of aid support, and means for elevating said casing relative to said support wheels.

31. In a mining machine, a wheeled support, a motor casing on said support hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing, driving connections between said motor and the wheels of said support, and means for angling said casing about a transverse axis relative to the wheels of said support.

32. In a mining machine, a wheeled support, a motor casing on said support hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing, driving connections between said motor and the Wheels of said support, and means for anglin said cutting mechanism about a transverse axis and elevating said casing relative to the wheels of said support.

33. In a mining machine, a motor having a casing hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing, and means for swinging said casing by said motor at different speeds including a plurality of selectively operable friction speed controlling clutches.

3a. In a n'iining machine, a motor having a casing hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing, and means for swinging said casing about its hinge at different speeds by said motor including a plurality of selectively operable friction speed controlling clutches and a sliding clutch.

'35. In a mining machine, a driving motor,

having a housing hinged at one lateral edge thereof to swing about an axis offset from the motor axis, and means driven by said motor for swlnging said housing about its hinge at a plurality of speeds including a plurality. of selectively operable friction clutches. i

37. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis parallel with the longitudinal axis of said body, a motor in said body, cutting mechanism carried by said machinebody, meansdriven by said motor'for swinging said machine body about itshinge, and means for elevating said supporting means to change the elevation of said cutting mechanism.

38. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing aboutan axis parallel with the longitudinal axis of said body, a motor in said body, cutting mechanism carried by said machine body, means for swinging said machine body about its hinge, and means driven by said motor for elevating said supporting means to changethe elevation of said 7 cutting mechanism.

39. In amining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis parallel with the longitudinal axis of said body, a. motor in said body, cutting mechanism carried by said bodyand driven by said motor, means driven by said motor for swinging said machine body about its hinge, and means driven by said motor for elevating said supporting means to change the elevation of said cutting mechanism.

40. In a mining machine, a wheeled supporting frame, a machine frame thereon hinged atone lateral edge thereof to swing about an axis parallel with the longitudinal axis of said machine frame, a motor carried by said machine frame, means driven by said motor for swinging said machine frame bodily in an arcuate path about its hinge, and means driven by said motor for propelling said wheeled supporting frame along a trackway.

41. In a mining machine, a wheeled supporting frame, a machine frame thereon hinged. at one lateral edge thereof to swing about an axis parallel with ,the longitudinal axis of'said machine frame, a motor carried by said machine frame, means driven by said motor for swinging said machineframe bodily in anarcuate path about its hinge, and

means driven by said motor for propelling said wheeled supporting frame along a trackway irrespective of the position of said ma chine frame relative to said supporting frame.

42. In a mining machine, a wheeled supporting frame, a machine frame thereon hinged at one lateral edge thereof to swing about an axis parallel to the longitudinal axis of said machine frame, said machine frame carrying a driving motor and variable speed transmission mechanism, means driven by said motor for swinging said machine frame bodily in an arcuate path about its hinge, and means driven by said motor through said transmission mechanism for propelling said wheeled supporting frame along a trackway irrespective of the position of said machine frame relative to said supporting frame.

43. In a mining machine, a wheeled supporting frame, a machine frame thereon hinged atone lateral edge thereof to swing about anaxis parallel with the longitudinal axis of said machine frame, said machine frame carrying a driving motor and variable speed transmission mechanism, cutting mechanism carried by said frame, means driven by said motor for swingingsaid machine frame bodily in an arcuate path about its hinge, and means driven by said motor through said transmission mechanism for propelling said wheeled frame along a trackway.

44. In a mining machine, supporting means, a machine body thereon hinged to swing about-an axis extending longitudinally of said supporting means and offset fromthe longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said machine body, means driven by said motor for'swinging said body about'its hinge to vary the position of-said cutting inechanism.

longitudinal axis of said body, a motor car- ,ried by said body, cutting mechanism earned by said machine body and driven by said motor, and means driven by said motor for swinging said body about its hinge to vary the position of said cutting mechanism. 46. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and oifset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body, means driven by said motor for swinging said body about its hinge, and means for elevating said supporting means to change the elevation of said cutting mechanism. r

47. In a mining machine, in combination, supporting means, a machine body thereon 45. In a mining machine, supporting hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body, means for swinging said body about its hinge, and means driven by said motor for elevating said supporting means to change the elevation of said cutting mechanism.

48. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body, means driven by said motor for swinging said body about its hinge, and means driven by said motor for elevating said supporting means to change the elevation of said cutting mechanism.

49. In a mining machine, in combination, wheeled supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body, means driven by said motor for swinging said body about its hinge, and means to vary the angle of said supporting means to tilt said cutting mechanism about a transverse axis.

50. In a mining machine, in combination, wheeled supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body and driven by said motor, means for swinging said body about its hinge, and means to vary the angle of said supporting means to tilt said cutting mechanism about a transverse axis.

51. In a mining machine, in combination, wheeled supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body, means driven by said motor for swinging said body about its hinge, and means to vary the elevation and the angle of said supporting means to change the elevation of said cutting mechanism and to tilt said cutting mechanism about a transverse axis.

52. In a mining machine, in combination, wheeled supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of the supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body, means driven by said motor for swinging said body about its hinge, means driven by said motor to vary the elevation of said supporting means to change the elevation of said cutting mechanism, and means to vary the angle of said supporting means to tilt said cutting mechanism about a transverse axis.

In a mining machine, a portable support, a machine body hingedly mounted at one side thereof on said support to swing on an axis extending longitudinally of said support and disposed parallel with the longitudinal axis of said body, kerf cutting mechanism supported by said body including a cut ter carrying cutter bar mounted for swinging movement relative to said body, means for swinging said body about its hinge to change the plane of said cutter bar, and means for driving said cutting mechanism and for swinging said cutter bar in any position of said body about its hinge to cut kerfs in a plurality of intersecting planes.

541-. In a mining machine, a portable support, a machine body hinged thereon at its side to swing from a horizontal position to a vertical position, a motor, cutting mechanism driven thereby and supported by said body including a cutter carrying cutter bar mounted for swinging movement relative to said body, and mechanism driven by said motor for swinging said body about its hinge and for swinging said cutter bar.

In a mining machine, a wheeled support, a machine frame hinged thereon at its side to swing from a horizontal plane to a vertical plane, a motor carried by said frame, cutting mechanism driven by said motor including a cutter carrying cutter bar pivotally supported on said frame for swinging movement relative thereto, and mechanism driven by said motor for swinging said frame about its hinge and for swinging said cutter bar.

56. In a mining machine, a wheeled support, a machine frame hinged thereon at its side to swing from a horizontal plane to a vertical plane, a motor carried by said frame, cutting mechanism driven by said motor including a cutter carrying cutter bar pivotally supported on said frame for swinging movement relative thereto, and mechanism driven by said motor for swinging said frame about its hinge and for swinging said cutter bar, and mechanism driven by said motor for driving the wheels of said support.

57. In a mining machine, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, said body carrying a motor and fast and slow speed transmission mechanism, cutting mechanism carried by said boc y and driven by said motor, and means driven by said motor through said transmission mechanism for swinging said body about its hinge.

58. In a mining machine, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and ofi'setfromthe longitudinal axis of said body, said body carrying a motor, cutting mechanism carried by said body and driven by said motor, and means driven by said motor for swinging said body about itshinge operativeirrespeo tive of the position of said body relative to said supporting means. v

59. In a mining machine, a-wheeled truck, a motor thereon having a casing hinged to swing about an axis extending longitudinally of said truck and ofiset from the longitudinal axis of said motor, cutting mechanism sup ported by said casing and driven by said motor, and means driven by said motor for swinging said casing about its hinge to vary the position of said'cutting mechanism.

60. Ina mining machine, awheeled truck, a motor thereon having a casing hinged to swing about an axisoflset from the longitudinal axis of said motor, cutting mechanismsupported by said motor casing and driven by said motor, means for elevating said casing relative to the truck wheels, and truck driving mechanism operatively connectible to said motor. I V

61 'In a mining machine, a wheeled truck, a motor thereon having a casing hinged to swing about an axis ofiiset from the longitudinal axis of said motor, cutting mechanism supported by said casing and driven by said-motor,.means for elevating. said casing relative tothe'truck wheels, truck driving mechanism operatively connect-ibis to said motor, and means for swinging said casing about its hinge operatively connectible to said truck driving mechanism,

62. In a mining machine, 'a wheeled truck,

a motor thereon having a casing hinged to swing about an axis ofiset from the longitudinal axis of said motor, cutting mechanism supported by said casing and driven bysaid motor, means for elevating said casing rela tive to the truck wheels, and truck driving mechanism operatively connectible. to sa1d motor irrespective of the position of said casing relative to said truck.

63. In a mining machine, a wheeled support, a motor casing on said support hinged to swing about an axis offset fromthe longitudinal axis of said motor, cutting mechanism supported by said casing and driven by said motor, drivingconnections between said motor'and the wheels of said support, and means for elevating said casing relative to said wheels.

64. In a mining machine,a wheeled support, a motor casing on said support hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanismsupported by said casing and driven by said motor, driving connections between said motor and the wheels of said, support, and means for angling said casing relative to said support wheels to tilt said cutting mechanism about a transverse axis.

65. In a mining machine, a wheeled support, a motor casing on saidsupport hinged to swing about an axis offset from the longitudinal axis of said motor, cutting mechanism supported by said casing and driven by said motor, driving connections between said motor and the wheels of said support, and f 67. In a mining machinepa motor having i a casing hinged to swing about an axis offset from the longitudinal axis of said motor, cut-- ting mechanism supported by said casing and driven by said motor, and means for swing ing said casing about its hinge at different speeds by said motor including a plurality of selectively operable friction speed controlling clutches and a sliding clutch.

68. In a mining machine, a driving motor, a casing housing said motor hinged to swing about an axis ofi'set.from the longitudinall axis of said motor, cuttingmechanism supported by said casing and driven by said motor, and meansrdriven by said motor for swinging said casing about its hinge at different speeds including a plurality of select ively operable speed controlling clutches.

69. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis parallel with the longitudinal axis of said body, a motor in said body, cutting mechanism carried by said machine body and driven by said motor, means :driven by said motor for swinging said machine body about its hinge, and means for elevating said supporting means to change the elevation of said cutting mechanism.

70. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis parallel with the longitudinal axis of said body, a motor in said body, cutting mechanism carried by said machine body and driven by said motor, means for swinging said machine body about its hinge, and means driven by said motor for elevating said supporting means to change the elevation of said cutting mechanism. e I 71. In a mining machine, in combination, supporting means, a machine body thereon hinged to'swing about an axis extending longitudinally of said supporting means and fleet from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body and driven by said motor, means for swinging said body about its hinge, and means driven by said motor for elevating said supporting means to change the elevation of said cutting mechanism.

In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis extending it gitudinally of said supporting means and o set from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body and driven by said motor, means for swinging said body about its hinge, and means driven by said motor for elevating said supporting means to change the elevation of said cutting mechanism.

73. In a mining machine, in combination, supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body and driven by said motor, means driven by said motor for swinging said body about its hinge, and means driven by said motor for elevating said sup porting means to change the elevation of said cutting mechanism. 7

'74. In a mining machine, in combination, wheeled supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of said supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body and driven by said motor, means driven by said motor for swinging said body about its hinge, and means to vary the elevation and angle of said supporting means to change the elevation of said cutting mechanism and to tilt said cutting mechanism about a transverse axis.

75. In a mining machine, in combination, wheeled supporting means, a machine body thereon hinged to swing about an axis extending longitudinally of the supporting means and offset from the longitudinal axis of said body, a motor carried by said body, cutting mechanism carried by said body and driven by said motor, means driven by said motor for swinging said body about its hinge, means driven by said motor to vary the elevation of said supporting means to change the elevation of said cutting mechanism, and means to vary the angle of said supporting means to tilt said cutting mechanism about a transverse axis.

76. In a mining apparatus, a Wheeled truck frame, cutting mechanism thereon including a cutter supporting frame and a motor for driving said cut-ting mechanism and carried by said supporting frame, said cutter supporting frame being hinged at one lateral edge thereof to said truck frame to swing about a longitudinal axis, and mechanism driven by said motor for tilting said frame about its hinge to change the plane of operation of said cutting mechanism.

77. In a mining apparatus, a frame, ad

justable supporting means therefor including relatively adjustable front and rear supports, mechanism for adjusting said supports relative to said frame to vary the elevation of said frame, cutting mechanism supported on said frame including a cutter supporting frame hinged at one lateral edge thereof to said first mentioned frame to swing about a longitudinal axis, and mechanism for tilting said cutter supporting frame about its hinge to change the plane of operation of said cutting mechanism.

78. In a mining apparatus, av frame, adjustable supporting means therefor including relatively adjustable front and rear supports, mechanism for adjusting said supports relative to said frame to vary the elevation of said frame, cutting mechanism supported on said frame including a cutter supporting frame hinged at one lateral edge thereof to said first mentioned frame to swing about a horizontal axis and a motor carried by said cutter supporting frame, and mechanism driven by said motor for tilting said cutter supporting frame about its hinge to change the plane of operation of said cutting mechanism.

7 9. In a mining apparatus, a portable frame, a coal cutting machine mounted thereon and hinged at one lateral edge thereof to said portable frame to swing about an axis extending longitudinally of the apparatus, said machine having cutting mechanism including a pivoted cutter bar adapted to cut a plane kerf, mechanism for tilting said coal cutting machine about its hinge relative to said frame to vary the plane of operation of said cutter bar, and means for swinging said cutter bar in its plane in any tilted position of said machine about its hinge.

80. In a mining apparatus, a portable frame, a coal cutting machine mounted thereon and hinged at one lateral edge thereof to said portable frame to swing about an axis extending longitudinally of the apparatus, said machine having cutting mechanism including a cutter bar and a driving motor, and mechanism driven by said motor for tilting said coal cutting machine about its hinge to vary the plane of operation of said cutter bar.

81. In a mining machine, supporting means, a machine body thereon hinged at one side thereof to swing about an axis offset from the longitudinal axis of said body, kerf cutting mechanism carried by said machine body including a pivoted cutter carrying cutter bar, means for swinging said body about its hinge to change the plane of cut of said cutter bar, means for swinging said cutter bar about

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