US2007902A

US2007902A - Mining apparatus

Info

Publication number: US2007902A
Application number: US516953A
Authority: US
Inventors: Louis A Maxson
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1931-02-19
Filing date: 1931-02-19
Publication date: 1935-07-09
Anticipated expiration: 1952-07-09

Description

July 9, 1 935. 1 A. MAXSON MINING APPARATUS Fi1ed Feb. 19, 1951 5 Sheecs-SheerJ www@ l.. A. MAxsoN July 9, 1935.

5 Smets-sheet July 9, 1935. L A. MAXSON Y 'LQU MINING APPARATUS Filed Febj 19, 1951 5 sheets-sheet 3 QQ Q 11 *Q Invewow:

Awal' L. A. MAXSON MINING APPARATUS July 9, 1935.

Filed Feb. 19, 1951 5 SheetS-Sheet 4 lmjenow:

Juy 9 1935., L, A, 'MAXSON Il MINING APPARATUS Filed Feb. 19, 1951 5 Sheets-Sheet 5 Patented July 9, 1935 n UNITED STATES PATENT orties LouisA. Maxson, Claremont, N. H., assignor to Sullivan Machinery Company, a corporation oi Massachusetts Application February 19, 193i;` Serial N-o.51i,S53 91'Claims. (Cl. 26E-2d) This invention relates to mining apparatus and Fig. 10 is a horizontal sectional view illustratmore particularly, but not exclusively, to iming details ofthe'imechanism shown in Fig. 9. provements in coal mining apparatus of the com- In thisillustrative construction there is shown bined horizontal and shear cutter type adapted to a coal vmining apparatus of the wheel-mounted,

operate while supported and guided by a mine track supported 'and guided type generally comb track, i v prising a self-propelled truck i having Wheels 2 An object of this invention is to provide an imadapted to run along a mine track 3. Mounted proved coal mining apparatus. Anotherfobject on the vtruck for adjustment into different 'eleis to provide animproved coal mining apparatus Vate'd Vrelative positions and foruniversal tilting E of the combined horizontal and shearcutter type. movement relativev to the truck is a substantially l0 Another object is to provide in such an apparatus; horizontal turntable Ll. Mounted on the turniinproved adjustable kerf cutting mechanism op table l for rotation relative thereto about an axis erative to cut keris in' parallel planes either horiparallel to the" turntable axis is a turntable 5. zontally or vertically. A further object is to pro- Mounted on the turntable 5 for rotation about vide an improved coal mining apparatus adapted an `axis extending radially from the axial line of l5 to operate while supported and guided by the the turntable is a cutter head 6 `having pivotally mine track and having improved adjustable keri mountedthereon about an axis perpendicular to cutting mechanism whereby shear kerfs maybe the axial line of the=cutter head a cutter bar l. inserted in the coal faceV at a plurality of loca- Suitablemotor operated devices are provided for tions between the ribs of the entry; and horidriving the truck Wheels, for adjusting the turn- Y20 Zontal kerfs irr` a plurality `of horizontal planes. table Afinto diierent elevated `and tilted positions Still anothercbject is to provide an improved relative to the truck, for-rotating'the turntables mining apparatus of the track supported and landt about their respective axes, for rotating i guided type having improved adjustable kerfcutthe cutter head 5 about its axis, and for swingting mechanism whereby a shear kerf may be ining thecutter bari about its pivot relative to the 25 serted in the coal face at thev center of the entrycutter head, as will hereinafter be described. and while the apparatus is mounted on and'guid-l Suitable v` mechanism is provided for propelling ed by a curved traclrway. These and other ob" the truck'in either direction along'theminetrack jects and advantages vof thislinvention will, how-Y at either 'a high transport or at a slow cuttingever, hereinafter more fully appearf speed.` To accomplish these functions I'hav'e 30A In the accompanying drawings there. is shown illustrated herein a suitably vmodified'mechanism for purposes of illustration one form Which'the from the prior art. This comprises a motor lll invention may assume in practice. VIn these carried at the rear end of the truck frame andV- drawingshaving its armature shaft it connected in drivf Fig. 1 is a plan View of the illustrative eming relation with alongitudinally extending shaft 35 bodirnent or" the improved coal mining apparatus; l2 (see Fig. 9). 'Fixed to the shaft l2 is a worm Fig. 2 is a side elevational View of the mining I3 meshing with a Worm Wheel M. This worm apparatus shown in Fig.v l; l y Y wheelis connectible to a horizontal transversely Fig. 3 is .an enlarged iragmentaryplan view of extendingshaft l5 by meansv of a multiple disc 40 the apparatus shown inFig. l, with vparts shown clutch I6 of a usual designhaving suitable cam 40 in horizontal section to illustrate' structural deoperating mechanism including a hand lever il. tails; Y Y Fixed to this transverse shaft l5 is a brake drum Fig. 4 is a central longitudinally extending verlhaving a usual brake band it which is also tical sectional View taken substantially on line arranged to becontrolled by the hand lever ll. e-ternes; .a v

HFig. 5 is a detail sectional vewtaken Onlinel the friction clutch IE is applied and the brake 5-5 of Fig. 3; lili released, and when swung in the opposite di- Fig. 6 is a vertical sectionalview taken sub rectionfthebrake is applied .and the clutch restantially on line 5-`6 of Figfl; l l leased. Journaled on the shaft i5 is a spur gear Fig. 7 is a horizontal sec'tionalview taken sub- 2t connectible with" theshaftby a jaw clutch 50 stantially on line 'L-l of FigsbZ-and 6; l member 2l splined to the shaft,` and this gear Fig. 8 is a vertical sectional view'taken substanmeshes with a spur gear Z2 fixed to atransverse i tially on line 8-8 of Fig.` 6;"` shaft 23. Keyed to the shaft l5 is a spur pinion Fig. 9 is a transverse vertical. sectional view 24 meshing with a spur gear 25 fixed to a trans- 5 When this hand lever is swung in one direction 45 taken substantially on line 9-9 of Fig. lyand verse shaftV 26. Splinedtotl'ie shaft 26 is a slid- 55 v able pinion 21 adapted to mesh with a spur gear 28 herein fixed to a sleeve 29 rotatable with the spur gear 2) and likewise journaled on the shaft i5. If desired, operating mechanism may be provided for clutch 2| and the sliding pinion 21 so that when one is connected the other is released. As illustrated, secured to the shaft 23 is a chain sprocket 38 connected by a usual endless chain connection 3l to a chain sprocket secured to the rear truck axle. The front and rear truck axles are connected together by a usual chain and sprocket connection 32. From the foregoing description it will be evident that when the jaw clutch 2l is shifted to connect the spur gear 2B to the shaft l5, and the pinion'21 is out of mesh with the gear 28, the truck wheels may be driven from the motor I0 at a relatively high speed through worm gearing I3, I4, friction clutch I6, shaft I5, spur gearing 25, 22 and the chain and sprocket connections 3i, 32. It will also be evident that when the jaw clutch 2'! is in its released position, that is, when the spur gear 2U is disconnected from the shaft l5 and the spur pinion 29 is in meshing engagement with the gear 28, the truck wheels may be driven atl a relatively slow speed appropriate for cutting through the reduction gearing 24, 25, 21, 28. Upon reversal of the motor I, the truck wheels may be driven to propel the apparatus in the reverse direction at either a relatively high or a relatively7 low speed.

Now referring to the supporting structure for the turntable 4 .and the devices for elevating and universally tilting the same, it will be noted that supported on the truck directly above the truck wheels is an annular or ring-shaped supporting frame 35 having attached thereto a plurality of, herein three, depending brackets 36, the lower ends of which are shaped to engage respectively with upstanding guide members 31 which are secured to the truck frame and which serve to prevent substantial lateral movement of the annular frame 35 and attached parts relative to the truck frame. Secured to the feet of these depending brackets 3S are screw nuts 38 (see Fig. 5)

which are threadedly engaged with vertical screws 3S. supported at their upper ends by the upstanding guide members 31 and at their lower ends in step bearings Mi formed in bearing brackets 4l attached to the bottom of the truck frame. It will'be noted that the screw nuts are so connected to the feet of the depending brackets 36 as to permit a slight relative rocking movement between the parts for a purpose to be hereinafter described. The three sets of screws and guide members constitute upright supports for the annular supporting frame 35, and the latter can be adjusted verticali;7 in parallelism or for universal tilting movement relative to the horizontal by suitable rotation of the screws 3S. Rotatably mounted upon each of the screws 39 at its lower end is aA chain sprocket 42 and these sprockets are driven by an endless chain 43. Idler sprockets 4t and 45 serve to guide the chain 43 relative toY the chain sprockets d2, the sprocket 45 being adjustable to vary the tension of the chain. As shown in Fig. 5, the chain sprockets 42 each have formed thereon clutch teeth G5 with which similar teeth on clutch members 41- splined to. the lower end of the screwsyare engageable. The screws extend downwardly through openings in the top plate d3 oi the truck frame. The clutch members 41 are each provided with a groove 43 in engagement with a shipper arm 5) attached to a vertical operating shaft 5l, The shafts 5| extend upwardly through the top plate 48 and they are each provided with a conveniently located handle 52 by which the movement of the clutch members 41 may be controlled. It will thus be seen that when all the clutches 41 are in a position to connect the chain sprockets to the screws the latter may be simultaneously rotated to effect movement of the annular frame 35 for supporting the turntable 4 together with the cutting mechanism supported thereby into different elevated positions relative to the truck frame. It will also be noted that by releasing certain of these clutches and connecting certain others, the screws may be operated to effect universal tilting movement of the turntable supporting frame relative to the horizontal to change the angle in altitude of the cutting mechanism. The mechanism for driving the screws 3S from the motor i5 herein comprises a bevel pinion 53 (see Fig. 9) journaled on the shaft I5 and connectible to the shaft by the jaw clutch member 2. This bevel pinion meshes with a bevel gear 54 iixed to a vertical shaft 55 while keyed to the lower end of this shaft is a chain sprocket 56 which engages and drives the endless chain 43. This particular turntable supporting and adjusting mechanism may obviously be modified or replaced by other designs, the design herein disclosed being one from the prior art.

The turntable 4 supported by the annular supporting frame 35 is, in the present instance, in the form of a circular casting which constitutes the main frame for supporting the cutting mechanism. This casting forms the turntable rotatable about the center of the annular frame 35 and is guided for rotative movement in the frame by a depending annular flange 51 iitting the interior periphery of the annular frame; and by a peripheral flange 58 overlying the tcp surface of the annular frame. If desired, suitable anti-friction rollers of any conventional design may be provided between the turntable 'l and the annular supporting frame 35 for reducing the friction between the parts. In the outer edge of the turntable casting is formed a series of notches 59, and cooperating with these notches is a slidable locking plate E!! mounted in a suitable guideway formed within a bracket Si attached to the annular supporting frame This locking member, when in its innermost position, is adapted to project within one of the notches 59 to lock the turntable 4 against rotation relative to the annular supporting frame 35. Motor operated devices are employed for rotating the turntable d relative to its annular supporting frame, and herein comprise a motor which may be of the reversible electric type, suspended beneath the turntable within the lateral limits of the supporting frame 35 and having its armature shaft 5S horizontally disposed and extended transversely across the turntable. Fixed to the armature shaft is a bevel pinion @l meshing with a bevel gear G8 xed to a vertical shaft (i9y as shown in Fig. 4. Fixed to the shaft B9 is a spur gear 1E! meshing at its opposite sides, as shown in Fig. 3, with spur gears 1i and l2. Rotatable with the spur gear 1i is a worm E3 meshing with a slow speed worm wheel 1li. This worm wheel is connectible by a usual multiple disc clutch 15, having any suitable type of operating means, to a transverse shaft 15,. Fixed to this shaft is a worm 11 meshing with a worm wheel 18 keyed to a vertical shaft 15. As shown in Fig, 4, rotatably supported on the shaft 19 is a spur gear Bily projecting through a slot 3l cut with the spur gear 'i2 is a worin 84 meshing With afast speed Worm wheel 85 having tion of ay multiple its teeth oppositely inclined from the teeth of the Worm Wheel 14 and operative upon applicadisc clutch ito effect drive of l. the shaftV 16 at a fast speed in a direction opposite from the slow `speed drive. It will thus be seen that when the gear 80 is connected to the shaft 'F9 by the .clutch 83 and one or the other of the

clutches

15, 86, is applied, the turntable 4 may be rotated relative to the annular supporting frame 35 at" a relativelyhigh positioning speed in one directionor at a relatively low speed appropriatefor cutting in the Vopposite direction. In its general arrangement this turntable rotating mechanism corresponds closely with a prior design. x 1

As previously mentioned, mounted on the turntable l` is a turntable 5 and this turntable comprises, in the particular form shown herein, a circular casting 9@ having a depending flange tting an annular member or ring Si secured as by screws EEZto the turntable 4. Attached to the turntable casting Sil is a thrust ring 93 underlying the ring 9| for maintaining the turntable 5 in position. 'The turntable casting 9i) is provided with a radial ange 5M overlying the ring 9| and rotatably mounted on a suitable .ring bearing 95.` For locking the turntable in its different adjusted positions about its axis relative to the turntablell, there is provided a plurality of recesses 96 formed in the flange Eid of the turntable casting, and cooperating with these recesses is a pivoted latch or dog Si supported by a bracket 98 attached to the turntable 4. Devices driven'by the motor iare employed for rotating the turntable 5 about its axis, and herein comprise a chain sprocket 99 rotatably supported on the lower end of the shaft.

'I9 (see Fig. 4) and'connectible to the shaft by `means of a multiple disc clutch 33a similar to the clutch 83 and having similar operating means. The sprocket 99 isconnected by an endless chain l to a sprocket lill xed to the lovver` end of a vertical shaft H32 suitably journaled Within the turntable casting of the turntable il. Fixed to the upper end` ofsthe shaft mais a spur gear |03 meshing Withthe teeth of .an internal gear Milt, herein formed integralr with theturntable casting titl., It will thus be seen that whenl the sprocket 99 is connected to the shaft i9 by the clutch Band `When one 0r the other of 5 may be simultaneously rotated about theirrethe friction clutches l5, 85 is applied, the turntable 5 may be rotated about its axis at a fast positioning speed in one direction and at a relatively slow speed'in the oppositedirection while the vturntable 1i remains stationary. It will also be seen that when friction clutches et and 33a are appropriately controlledthe turntables i and spective axes in opposite directions Vand at substantially the same angular speeds.

Now referring to the cutting mechanism sup- .ported by the turntable 5 and the supporting structure therefor, it will be observed that the turntable casting 9@ is provided With an integral box-like extension or arm H35 extending radially from the axial line of the turntable 5 and this y arm. is rigidly braced With respect tot the turn- (Fig. 3)r

flange It? arranged in a substantially vertical position and rigidly braced with respect to the arm by means of vertical Webs l. This circus` lar flange illl has attached thereto a cylindrical bearing sleeve it (see Figs. 6 and 7) androtat-ablyV mounted on this sleeve is a cylindrical supporting frame lli) having an inwardly directed annular retaining flange i i i and attached tothe frame H2 of lthe cutter head t; Mounted on the cutter head frame for rotation about an axis at right angles to the axis of the cutter head is a cylindrical supporting frame M3 rotatably mounted in a bore lili form-ed in the cutter head frame. A thrust ring H5 attached tothe cutter head frame retains the frame H3 in its bore. Attached to the frame H3 is a support or hanger El which carries the cutter bar l. Mounted for orbital movement on the margin of the cutter bar 'l is a usual cutter chain l Vl carrying usual cutter bits.

The mechanism for driving the cutter chain il] comprises a bevel gear H8 (see Fig. 4;) meshing with the gear 6l and fixed to a horizontal shaft l i9. Fixed to the opposite end of this shaft is a bevel gear H20 meshing with a bevel gear l2! fixed to a vertical shaft 22 having its axis coincident with the axis of the turntable 5. The shaft |122 drives a bevel gear 23 Which in turn meshes with and drives a bevel gear i211 fixed to a horizontal shaft U25 herein extending radially from the axial line or the turntable 5. Keyed to the outer end of the shaft 25 is a spur pinion lii meshing With a spur gear |2'l1 fixed to a horizontal shaft 28 extending along the axis of the rotatable cutter headV li. Herein fixed to the forward end of the shaft 23 as shown in Fig. 6 is a bevel gear l2@ meshing with and driving a'bevel gear le@ f see also Fig. 6) journaled on a shaft it herein arranged With its axis coincident With theV axis of, bar swing. The shaft iti has fixed 'thereto and drives a sprocket l32 Which in turn engages and drives the cutter chain ll'i. The gear i3d is connectibzle to the shaft H36 by a sliding javv clutch i3d having usual clutch shipper i3d' operatedby a. handle 35. It Will thus be seen that irrespective of the adjusted position of the turntable 5 and cutter head 5 relative to the turntable il,V the cutter. chain ill may at all times be driven, and that by simply releasing the clutch liii the cutter chain may remain idle during runningof the motor 5.

Now referring to the mechanism for effecting swinging of the cutter bar 'l about its pivotal axis relative to the cutter head, it Will be noted that rotatable with the `gear i3@ (Fig. 6) isa bevel gear E36 constantly meshing with the reverselyA meshing with a Worm Wheel M55 fixed to a shaft M5 arranged parallel With the shaft lill. Fixed to the shaft M6 is' spur pinion lill meshing with the teeth of an internal gear l .18A herein formed integral with the cylindrical supporting frame H3 for thecutter bar l. The Worin |44 is connectible to the shaft |39 `by a sliding clutch element |49 and cooperating clutch elements carried by the worm and shaft respectively. The sliding clutch element |49 is provided with usual shipper mechanism l5@ operated by a handle |5|. It will thus be seen that depending upon which one of the` friction clutches IAQ, |4l, is applied the cutter bar may be swung about its pivot relative to the cutter head at a speed appropriate for cutting in either of opposite directions. The mechanism for rotating the clutter head 6 about its axis herein comprises a worm |52 connectible to the shaft |39 and meshing with a worm wheel |53 fixed to a longitudinally extending shaft |54 arranged parallel with the shaft |28. This shaft carries a pinion l55 meshing with the teeth of an internal gear |55 herein formed integral with the cylindrical bearing sleeve |99 on which the cutter head 5 is rotatably mounted. The worm |52 is connectible to the shaft |39 by a sliding clutch element l5? cooperating with clutch elements carried by the worm and shaft respectively. This sliding clutch element is provided with usual shipper mechanism |58 operated by a handle |59. It will, therefore, be evident that the cutter head l may be rotated about its in either of opposite directions under the control of the friction clutches |49, 4|. The worm gears |44, |45 and |52, |53 of the bar swinging and head rotating mechanisms are self-locking and upon release of the clutches |49, |51 maintain automatically the cutter bar and head in their respective positions of adjustment.

Electrical energy may be conducted to the electrical controlling apparatus for the motors IG and through a usual flexible conductor cable |60 wound upon a cable reel ll supported at the rear end of the truck as shown in Figs. l and 2. This cable reel is driven by the motor I0 through the following connections: As rnentioned above, journaled on the shaft l5 is a sleeve 29 integral with the spur gear il@ (see Fig. 9) and rotatable therewith at either a fast or a slow speed through the gear trains above referred to. Splined to this sleeve is -a suitable jaw clutch |62 having clutch teeth engageable with clutch teeth formed upon a driving pulley |63 journaled on the sleeve 29. This pulley |63 is connected by a belt |64 to a pulley |65 secured to the cable reel. It will be evident that as the truck wheels are driven to propel the apparatus in either direction along the mine track, the cable reel |6| may be also rotated to wind in or pay out the conductor cable in a manner well understood in the art.

The preferred mode of operation of the improved mining apparatus will now be described: The apparatus is propelled about the mine for wardly along the mine track at a relatively fast transport speed through the truck driving gearing I3, I4, 20, 22 driven by the motor IB. When the apparatus is traveling .about the mine, the turntables ll and 5, the cutter head 6 and the cutter bar 'l are disposed in their transport position as shown in Figs. l and 2. When the working face is reached the fast truck wheel drive is disconnected from the motor l0 by releasing the friction clutch l5 and the jaw clutch 2|. If it is desired to make a horizontal cut in the coal face in accordance with the arcwall method of cutting, the operator rst connects the clutch |49; and upon application of the friction clutch |40 the cutter bar is swung about its pivot relative to the cutter head from the central longitudinal position shown in Fig. 1 to a position where the tip end of the cutter vbar is disposed adjacent the coal face at the right hand rib of the entry, the clutch |40 thereafter being released. The self-locking worm gearing |44, |45 holds the cutter bar in this position. The clutch |33 is then shifted to a position to connect the shaft |3| to the driving gear |30 thereby connecting the cutter chain Ill in driving relation with the motor 65, and as a result the cutter chain is rapidly circulated about the margin of the cutter bar 1. The pinion 2l of the truck driving mechanism is then slid into meshing engagement with the gear 28 and, upon application of the friction clutch i6, the apparatus is propelled bodily along the mine track at a cutting speed thereby to effect sumping of the cutter bar within the coal, the clutch I6 thereafter being released. The brake |9 is then applied, holding the truck wheels against rotation thereby preventing movement of the apparatus relative to the mine track. The friction clutch I4 of the bar swinging mechanism is then applied and the cutter bar swung at a relatively slow cutting speed to effect its transverse swinging cut across the coal face, the clutch Uil and brake thereafter being released. When the tip end of the bar is positioned in the left hand rib of the entry and the swinging cut completed, the motor l0 is reversed and upon application of the friction clutch I6, the apparatus is propelled bodily rearwardly along the mine track at a slow cutting speed to effect withdrawal of the cutter bar from the coal thereby completing the kerf in the coal. After the horizontal cut has been completed the sliding gear 2l is shifted out of mesh with the gear 28 and the clutch 2| shifted to a position to connect the gear 2G to the shaft l5, and upon application of the friction clutch i6 the apparatus is propelled bodily rearwardly along the mine track at a relatively high transport speed to another working place. It will of course be understood that instead of swinging the cutter bar about its pivot relative to the cutter head 8 during the transverse swinging cut the bar may be swung with the turntable 4 about the turntable axis as a pivot under control of the friction clutch 83 and under certain conditions the bar may be swung about the axis of the turntable 5 under the control of clutch 83e.

If it is desired to insert horizontal kerfs in the coal face at different elevations this may be accomplished simply by shifting the clutch members 49 of the turntable elevating mechanism downwardly to connect the chain sprockets 42 to the adjusting screws 39 and sliding clutch 2| to connect the bevel 53 to the shaft l5. The motor I0 is then rotated in the proper direction and, upon application of the friction clutch i6, the turntable 4, together with cutting mechanism carried thereby, is adjusted vertically relative to the truck. If it is desired to tilt the turntable i relative to the horizontal to change the angle in al titude of the cutting mechanism, this may be accomplished by disconnecting certain of the adjusting screws from the motor while the others are rotated thereby. For instance, if it is desired to tilt the tip end of the cutter bar downwardly this may be accomplished by disconnecting the clutches for the front elevating screws 39 while the rear elevating screw is connected to the motor thereby causing the rear edge of the turntable to be tilted upwardly. Conversely, if it is desired to tilt the tip end of the cutter bar up wardly the rear elevating screw may be disconnected from the motor while the front elevating 'Y Y d ent mining conditions.

horizontal cutsadjacent the mine'roof the operathe cutter ybar the locks 60 `'and 91 table rotating means,

" tially l the same f sible to insert shear cuts `that an improvedl coal n i vided `which is adapted tocut horizontal kerfsf universally tilted into `different angular positions about transverse, longitudinal or any desired intermediate axes, thereby enabling the cutterfbar tobe positioned toacco-mmodate itself to differ- If it is desired to insert tor connects the clutch l? .and upon application of one or the other of the `friction clutches Ille, 14|, the cutter head 6 may be rotated about the' head axis untilf` the cutterbar assumes a horizontal -topv cutting position, the clutches thereafter being released. When the cutter bar-isin this top cutting position the turntable 4 may be elevated-along the elevating` screws 39 toits uppermost position relative to the truck.

" l Afshear orvertical cut may be inserted'in the` coal face simply byconnecting the clutch l all and applying one-orthe other of the friction clutches ille, Ml thereby effecting rotation of the cutter'v head about itsv axis to `bring thecutter bar l into 3' a position to Vswing vertically, the clutches thereafter being released. If it is desired to insert a shear` cut at the center of the entry, the cutter head is shifted laterally into the position indicated in dotted lines in Fig. l. To so position for the turntables ll and 5 'are released and the gear 80 and the'sprocket 99 are connected to the shaft 19 by the-clutches33 and 33a and upon application ofthe proper friction clutch 75, 85 of theturn the turntable il is rotated relative to the truckin a counterclockwise direction, as viewed in Fig. 1 while the turntable 5 is rotatable, if the drive of turntable ll bey appropriately slipped, simultaneously at substan- 'angular speed in a clockwise vdirection, thereby moving the turntable 5 from the full line position shown' in Fig. 1 to the `dotted line position in spective locking elements 6D and 97. The cutter bar is swung upwardly, sumped in, swung downwardly in its plane, and withdrawn from the coal in 'substantially the same Ymanner as in the horizontal cut described above. If it is desired to insert a shear cut at theV left hand rib of theentry this may be accomplished respect to thehead axis from that shown in dotted lines in' Fig. l. Also it will be evident that by suitably adjusting the turntable 4 and 5 about theirlrespective' axes and by adjusting the`cutter` bar about the axis of the cutter head 6 it is posin the coal face at any desired location vbetween the ribs? of the entry.

It will also be `noted that cutter bar and withdraw the bar'from the coal as the truck moves bodily forwardly and rearwardly along. the curved mine track, the free movement of the turntable preventing'the cutter bar from being cramped in the kerf. As a result ofthis invention,` it will be noted mining apparatus isprothat figure, the friction Yclutchesv thereafter being'released. The turntables 4 andv 5 are then locked against rotation by theirrea when the parts are in` the dotted 'line position indicated in Fig. -l andV it is desired to insert a shear cut in the coal faceV While theapparatus `is supported and guided by a curved mine tracl ,it`i`s possible'to sump in the 5 ina plurality of parallel 'planes and also to make shear or vertical cuts at any desired location between the' ribs of the entry.` It will further be noted" that, due to the plurality of turntable mountings on the truck'for the cutting mechanism, it is possibleto adjust the cutter bar to insert Ashear cuts in1 the coal within a comparatively widerange, and'also to permit the cutter bar to inserta shear cut at the center of the entry while the apparatus is supported and `guided on vided wherein thel adjusting mechanism for the' kerf cutting mechanism is extremely flexible, it being possible to operate the apparatus adjacent the oor and roof of the entry, at the center of the entry, and tomake'shear cuts ata plurality of locations between" the ribs'of the entry, thereby enabling `the-apparatus to accommodate itself to a comparatively wide range of cutting conditions.` These and other uses and advantages 'o the improved mining apparatus will be clearly ap-" parent to those skilled in the WhileV there art. is in this application specically described oneform which this invention may assume in practice; it will be understood that this form of the same is shown for purposes of illustration and that the invention may be' modied `and embodied in various other forms without departing from its spirit or thescope of the ap#` pended claims. p Y

"'What I claim as Letters Patent is: Vl. In a mining apparatus, a portable base, a support mounted on said base for swinging movement relative thereto about a normally vertical axis, a second support mounted on said iirst support for swinging movement relative thereto about a parallel axis lying within the lateral new and desire to secure by limits of -said ilrst support,` said second sup"-` port overlying-said rstsupport and overhanging the front end of said base, a kerf cutter pivotally Amounted on thev outer extremity oi said second support for swinging movement relative thereto, and means` for swinging said supports about their respective axes and for swinging said cutter bar about its pivot. Y

2. Ina mining apparatus, a portable base, a`

support mounted on said base for swinging movement relativethereto about a normally vertical axis, a second support mounted on said first Vsupport for swinging movement relative `thereto about a parallel axis, said second support overhanging the 'front` end ofsaid base, a kerf cut-- ter pivotally mounted on the outer extremity of said second support for swinging movement relative thereto, means for swinging said supports about their respective axes and for cutter barabout its pivot, and a motor carried by said rstlsupport for driving `said support swinging means and'- the means for swingingv said cutter bar.

`3. In a` mining apparatus, a portable basefa 'supportmounted on saidvbase for adjustment relative thereto `into diierent elevated positions andl for -rotationrelative to the base about a normally vertical axis, a second support mounted on said first support for rotation relative theres to .aboutV a parallel axis, said second support overhanging the front end cutter pivotally mountedv on of said second supportfor swinging movement relative. thereto, means for adjusting the elevation of said first support relative to the base, and means for swinging said supports about their reswinging Saido-i said base, a. kerf' the outer extremity spective axes and for swinging said kerf cutter about its pivot.

4. In a mining apparatus, a portablel base, a support mounted o'n said base for adjustment relative thereto into diierent elevated positions and for rotation relative to the base about a normally vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis, said second support overhanging the front en d of said base, a ker cutter pivotally mounted on the outer extremity of said second support for swinging movement relative thereto, means for adjusting the elevation of said iirst support relative to the base, means for swinging said ,supportsA about their respective axes and for swinging said lrerf cutter about its pivot, and a motor carried by said first support for driving said support swinging means and theV means for swinging said kerf cutter.

i 5, In a'` mining apparatus, a portable base, a support mounted on said base for adjustment relative theretoy into diierent elevated positions and for rotation relative to the base about a normally` vertical axis, a second support mounted on said first support forrotation` relative thereto about a parallel. axis', said secondl support overhanging the iront,y end of said base, a kerf cutter pivotally mounted. on the outer extremity ofv said second support fo'rrswinlgingv movement relative thereto, means for adjusting the elevation of said iirst support relative to the, base, vn ieans for swinging said support about their respective axes and for swinging said kent cutter Yabout its pivot,Y a motor carried by saidL iirst support for driving said support swingingmeans and the means for. swinging said lgerf cutter,anda motor carried by the portable base for driving the means for.. adjusting the elevationof saidrst support.

G'. In a` mining apparatus,4 a movable base, a support mounted yonsaidbasefor swinging movement relative. thereto axis, a,4 secon said iirs't support for independentrotation relative thereto about a parallel axis, normally dis.-

posed forwardlyor, said first mentioned verticalV axis, a, substantially horizontally extendingA cutter bar, mounting means fon the cutter. bar in connectionl with the second support whereby the bar movable relative to the support abouta plurality of rectangularly related axis of. which oneis substantially ontne horizontal, means operable to swing saidA supports, about their respscttivev axes, and means roperable to move the cutter bar about said plurality of rectangularlyrelated axeS-.

7;. In. n iining` apparatus, a, movable base, a supportmountedon said base for swinging movement relative thereto about; anormally vertical.

axis, a second support mounted onsaid rst sup- RQI' ,fOrv rotation relative thereto about a parallelaxis, a substantially horizontally, extending cutter bar, mounting means for the cutter bar in connecties Withthe .seeondfsuppert whereby the Der, is.

one, issubstantially on the horizontal, means oparable to swingV said supportsv about. theirrespective axes, means ioperable tornove the.- cutter bar about saidgplurality, ofrectangularly related'v axes, and. motor on said irsl-supporty for driv-Y les. the.y support. swinging means and` the. cutter.

bar: menne means. e

. .8E In e. mlmnsenperatus. .artruek adapted: to.

travel over` a mme. track.. a. .turntable supported.; ruck for rotationrelatiye to said truck.

on, ssn

labout ak normally verticald, elongated, support mounted on,

mouablerelative to the support abouta. pluralityoi rectangularly related axes. of which.

on a normally vertical axis,v a second turntable mounted on said irst turntable for rotation relative thereto about al parallel axis, an arm fixed to said second turntable and projecting horizontally therefrom, a kerl cutter supported by said arm for movement relative thereto about a plurality of rectangularly related axes of which one is. substantially on the horizontal, means operable to rotate the turntables, and means operable to move the cutter bar about said plurality of rectangularly related axes.

9. In a mining apparatus, a truck adapted to travel over a mine track, a turntable supported on said truck for rotation relative to said truck on a normally vertical axis, a second turntable mounted on *said rst turntable for rotation relative thereto about a. parallel axis, an arm iixed to said, second turntable and projecting horizontally therefrom, a kerf cutter supported by said arrnfor movement relative thereto about a plurality of rectangularly related axes of. which one is substantially on the horizontal, means operable to rotate the turntables, means operable to rnove the cutter bar about said plurality of rectangularly related axes, and a motor on the rst turntable for` driving the turntable swinging means and the cutter bar moving means.

10.7Ina mining apparatus, a movable base, a support mounted on said base for swinging movement relative thereto about a normally vertical axis and florna-djustment bodily relative to said base, a.I second support mounted on saidj first support for swinging` movement relative thereto' abouta parallel axis a substantially horizontallyl extending cutterbal, mounting means for the cutter b ar in connection with the second support whereby the baris movable relative to the support about a plurality of rectangularly related. axes of whichA one isV substantially on the horizontal, means operable to adjust bodily said first:l support relativeto the base, means operable tov swing thesupports about their respective axes, and means operable to move the cutter bar about said plurality; of rectangularly related axes.

'1l.I n arminingapparatus, a movable base, aA support mounted onsaid-base for swinging movement relative thereto about a normally vertical. axis and for adjustment bodily relative to. said' base, a second support mounted on said first support for swinging movement' relative thereto4 about a parallel axis, a substantially horizontal.-4 ly extending` cutter bar, mounting means for the cutter. bar in connection with the second supporta/hereby the bar is movable relative to-L tical axis. and for adjustment bodilyrelative to.

saidA base, a second support mounted' on said nrst support for swinging movement relative theretogabout aparallelaxis, a substantially horizontally extending cutter bar, mounting means for the cutter bar in connection with the second supprt whereby the bar is movable relative to.

the: support about a plurality. of rectangularly.

related axes of which one is substantially on the horizontal, means operable` to adjust bodily said iirst support relative to the base, means operable Y on said iirst support for driving the support swinging` meanaand the cutter bar moving means, and' a motor` on said base for driving said adjusting means for bodily adjusting said rst support.` i

. 13. In a mining apparatus, a truck adapted to travel `over a mine track, a turntable, means supporting said turntable `on saidA truck for rotation relative tothe truck on a normally vertical axis and also for bodily `adjustment relativeto the truck, a second `turntable mounted on said iirst turntable for rotation relative thereto about a parallel axis, an arm iixed to the second turntable` and projecting horizontally therefrom, a kerf cuttersupported by said arm for movement relative thereto about a plurality ofrectangularly related axesof which one is substantially on the horizontal, meansoperablefto adjust bodilyasaid k rst turntable relative to the truck, means operable to rotate said turntables about ytheir respective axes, and meanspperablefto move the cutter `bar` about said plurality of retangularly related axes. i

14. Ina mining apparatus, truck adapted to travel over a mine track, va turntable, means supporting said turntable on said truck for rota-v `tion relative tothe truck on a normally vertical Y. i i axisiand also for bodily adjustment relative to the truck,` asecond turntable mounted on said first turntable for rotationrelative thereto about a. parallel axis, an arm iixed to the second turntable and projecting horizontally therefrom, a kerf cutter supported by, said arm-forlmovement relative thereto about a plurality of rectangularly relatediaxes of which one'is substantially on the horizontal,` means operable to adjust bodily said first turntable relative to the truck, means operable to rotate said turntables about their respective axes, means operable to move the cutter bar about said plurality of rectangularly related axes, and a motor onthe iirst turntable for drivi ing the turntable rotating means and the cutter bar movingmeans. Y l5. In a' mining apparatus, a truck adapted to travel overa mine track, a turntable, means supporting said turntable on said truck for rotation relativeito the truckon a normally vertical axis and also for bodily adjustment relative `to the truck, `a second turntable mounted on said rst `turntable forlrotationrelative thereto about a parallel axis, ,an arm xed to the second turntable and projecting horizontally therefrom, a

kerfV cutter supported by said arm orgmovement relativethereto'about a plurality of rectangularly related axes of which one is substantially on the horizontaL-means operable to adjust bodily said rst turntable relative to the truck, means operable to rotate said turntables about` their respective axes, means operableto move the cutter bar` about said plurality of rectangularlyrelatedV axes,4 a motor on the rst turntable for driving the turntable rotating means and the cutter-barV moving means, and-a motor on the truck for driving said means,A for bodily adjusting the'` iirst turntable. i i

16. In `a mining apparatus, `a movable base, a support mounted on said base for swinging movement relativeithereto about a normally vertical axis and also for universal tilting movement relative tothe base, a second support mounted on said iirst support for swinging movement relative thereto` about .a parallel axis, a substantially horizontally extending cutter bar, mounting means for the cutter bar in connection with the secondsupport whereby thebar is movable relative to the support about a'plurality ofirec-v ting mechanism carried at the outer extremity of said arm structure and adjustable relative thereto into horizontal and vertical cutting positions. i8. In a mining apparatus, afportable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, an arm structure pivotally mounted upon a substantially upright axis on said turntable for swinging movement relative thereto'about an axis located adjacent the forward end of said b-ase and overhanging said base, and lkerf .cutting mechanism carriedat the outeroverhanging extremity or" said arm structure and adjustable relative 'thereto into horizontal and vertical cutting positions.

i9. In a mining apparatus, a portable base, a support mounted on said base for adjustment relative thereto into different elevated positions and for rotation about a vertical axis, an arm structure pivotally mounted upon a substantially upright axis on said support for swinging movement relative thereto and extending forwardly in advance of said base, and leri cutting mech-` anism mounted on the outer extremity of said arm structure and adjustable relative to said armY structure into horizontal and vertical cutting positions.

:20. In a mining apparatus, a portable base, a korf cutter swingable to cut a kerl" in a vertical plane, mounting means on said base for adjustallel planes including a plurality of relatively adjustable supports swingable relative to said base about parallel vertical axes, and motor operated devices including a motor mounted on one of said swingable supports for swinging said supports about their respective axes.

21. Ina mining apparatus, a portable base, a rf cutter swingable to cut a kerf in a vertical plane, mounting means on the base for adjusting said kerf cutter to cut vertical kerfs in parallel planes including a support mounted on said base for swinging movement relative thereto about a vertical axis, and a support mounted on said irst support for swinging movement about a parallel axis, said second support having said kerf cutter mounted thereon for swinging elongated, support mounted on said first suprelative thereto,

Cil

8 port for independent swinging movement relativethereto about a normally more-iorwardly-disposed parallel axis, a ker` cutter, means for mounting said lierf cutter on said second support for adjustment relative thereto into parallel cutting positions, and means for swinging said supports about their respective axes to position said kerf cutter into parallel planes laterally relative to said base.

23. In a mining apparatus, av portable base, a support mounted thereon for swinging movement relative thereto about a vertical axis, a second, elongated, support mounted on said first support or independent swinging movement relative thereto about a normally more-iorwardly-disposed parallel axis, a kerf cutter, means for mounting said Keri cutter on said' second support or adjustment relative thereto about a horizontal axis to position said kerf cutter in parallel cutting planes at either side of said horizontal axis, and means for swinging said supports about their respective axes to position said kerf cutter into parallel planes laterally relative to said base.

24.-. In a mining apparatus, a portable base, a support mounted on said base for swinging movement relative thereto about a normally vertical axis, a second support mounted on said irst support for swinging movement relative thereto about a parallel axis, said second support overhanging the iront end of said base, a kerf cutter pivotally mounted on the outer extremity of said second support for swinging movement rela.- tive thereto, means for swinging said supports about their respective axes and for swinging said cutter bar about its pivot, and a motor carried by one of said supports for driving said support swinging means and the means for swinging said cutter bar.

25. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a second turntable mounted on said first turntable for rotation relative thereto and to said base about a parallel axis, a cutter head mounted on said second turntable for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, and motor operated' devices for rotating said turntables about their respective axes to move said cutter head into different lateral positions relative to said base.

26. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a second turntable mounted on said first turntable for rotation relative thereto and to said base about a parallel axis, a cutter head mounted on said second turntable for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, and a` motor mounted on one oi said turntables for rotating said turntables about their respective axes.

27. In a mining apparatus, a portable base; a

support mounted on said base for tilting movement relative thereto about transverse and longitudinal axes, an arm structure pivotally mounted upon a substantially upright axis on the forward end of said support for swinging movement relative thereto, a cutter head rotatably mounted on the outer extremity of said arm structure, and a kerf cutter pivotally mounted on said cutter head.

28. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a second turntable mounted on said first turntable-for rotation relative thereto andto said base about a parallel axis, a cutter head mounted on said second turntable for rotation relative thereto about a horizontal axis, aherf cutter pivotally mounted on said cutter head, and a motor mounted on one of said turntables for rotating said turntables about their respective axes and. for rotating said cutter head:

29; In a mining apparatus, a portable base, a horizontal. turntable mounted on said base for rotationI about a; vert-ical-` axis and for universal tilting movement relative to the horizontal, said turntable being adjustable ina Vertical direction relative to said bast',- an arm structure pivotally mounted upon` a substantially upright axis on said turntable and' adjustable therewith and swingable relative thereto, and ke'f cutting mechanism car-` riedl at the' outer extremity of said arm structure and adjustable relative thereto into` horizontal and vertical cuttingpositions.

30. In a mining apparatus, a.- portable base, a horizontall turntable mounted on said base for rotation relative thereto about a` vertical axis, a second turntable mounted on said first turntable for rotation relative thereto and to said base about a parallel axis', a cutter headfmounted' on said second turntable for rotation relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head, and a motor mount'- ed on one oi said turntables for rotating said turntables about their respective axes, for rotating said cutter head and for swinging said kerf cutter.

3l. In a mining apparatus,ra portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a second turntable mounted on said rst turntable for rotation relative thereto and to said base about a parallel axis, a cutter head mounted on said second turntable for rotation relative theretol about a horizontal axis, a kerf cutter pivotally mounted on said' cutter head, and a motor mounted on said rst turntable and relative to which the second turntable is rotatable for rotating said turntables about their respective axes, for rotating said cutter head and for swinging said keri cutter;

32'.l In a mining apparatus, a movable base, a support mounted on said base for swinging movement relative thereto about a normally vertical axis and also for tilting movement relative to the base, a secondy support mountedon said iirst support for swinging movement' relative theretoA about al parallel axis, a substantially horizontally extending cutter bar, mounting means for the cutter bar in connection with the second support whereby the bar is movable relative to the support about a plurality of rectangularly related axes ot which one isy substantially on the horizontal, means operable to` tilt the iirst support, means operable to swing both supports about their respective axes, and means operable to move the cutter bar about said plurality of rectangularly related-axes..

33. In a mining apparatus, a movable base, a support mounted on said base for swinging movement relative thereto about a normally vertical axis and also'for tilting movement relative totherv base, a second support mounted on said' rst support for swinging, movement relative thereto about aparallel' axis, a substantially horizontally extending cutter bar, mounting means` for the cutter bari'n connection with the second support whereby theA bar is movable relative to the support about a plurality of rectangularly related' axes of whichA one isl substantiallyon the* hori.

travel over a mine track, a turntable, means supporting saidV turntable on said truclf.` for rotation relative to the truck on a normally vertical axis and also for tilting movement relative to the truck, a second turntable mounted on said rst turntable for rotation about aV parallel axis-nn,

arm fixed to said second turntable and projecting horizontally therefrom, a kerl cutter supporjtedby said arm for movement relative theretoabout; a plurality or rectangularly vrelated axes of which one is substantially on the horizontal, means operable to tilt said first turntable, means operable to rotate said turntables about V,their respective axes, and means operable to move thecutter bar about saidplurality of rectangularly related axes, l Y A 35.` In a mining'A apparatus, a truck adaptedl to travel over a mine track,.a turntable, means supporting said turntable on said truck for rotation relative to the truck Yon a normally verticalaxis and also for tilting movement relative to the truck, a second turntable mounted onsaid first turntable for rotation about a parallel axis, an arm xed to said second turntable and projecting horizontally therefrom, a kerf cutter .supported by said arm for Vmovement relativenthereto about a` plurality of rectangularly related axesof which onel is l substantially on the horizontal, means operable to tilt said nrst turntable, means operable to rotate said `turntables about their respective axesmeans-operable to move the cutter bar about said plurality of rectangularly related axes,

and a motor on the first turntablefor driving the turntable rotating means and the cutter bar moving means. i

36. In a mining apparatus, a portable base, a support mounted on said base'for rotation relativeV thereto about a vertical axis, a second support mounted onV said rst support for rotation relative thereto about a parallel axis, said second support overhanging said base, a kerf cutter pivotally mounted on said second support to swing relative thereto about another parallelaxis, and motor operated devices for independently rotating said supports about their respective axes. Y

37. In a mining apparatus, a portable base,V a support mounted on said base for rotation relative thereto about a vertical axis, a secondsupport mountedonsaid rst support for, rotation relative thereto about a parallel axis,` said second support overhanging said base, a kerf cutter pivotally mounted on said second support to'swing` relative thereto, and motor operated devices for independently rotating said supports about their respective axes and including a motor mounted onone of said supports. V l

38. In a mining apparatus, a portablegvbase,` a support mounted on said base for `rotation relative thereto about a vertical axis, a seconde support mountedon Vsaid first supportfor rotation relative thereto about a parallel axis, saidsecond support overhanging said base, a kerf `cutterepivotally mounted on said second support to'gswing relative thereto, and motor operated devices fory independently rotating said supports about their respectiveaxes and'vincluding a motor` mounted' on said first support and relative `to which theV zontal axis, anda kerf cutter `onsaid cutter head. s

second support is rotatable for rotating both of said supports; Y

39. In a mining apparatus, a portable base, a support mounted thereon for swinging movementrelative thereto `about a vertical axis and for adjustment into different elevated positions relative tov said base, a second support mounted on saidfirst support for swinging movement relative thereto about` a parallel axis, a kerl" cutter, and means for mounting said kerf cutter on said second supportior adjustment relative thereto into parallel cutting positions. v

40; In a mining apparatus, a portable base,

`al-support mounted thereon for swinging movement relative thereto about a vertical axis and for adjustment into different elevated positions relative to` said base, a second support mounted on said rstsupport for swinging movement relative thereto about a parallel axis, a kerf cutter, and meansfor mounting said kerf cutter on said secondsupport for adjustment relative thereto `about a horizontal axis to position said kerf cut-` planes at either side rof ter-in parallel cutting said horizontal axis. u l

41. In a mining apparatus, a portable base, alhorizontal turntable mounted on said base for .rotation `relative thereto about a vertical axis and'for adjustment into different elevated positionsrelative ,to said base, a second turntable mountedonsaid' rst turntable for rotation Vrelative thereto and to said base about a parallel axis,a cutter head mounted on said second turntable forrotation relative thereto about a horipivotally mounted l 42. In a mining apparatus, a portable base, a support mounted on said base for rotation relative .thereto about a Vertical axis, a second support mounted on said'rst supportV for rotation relative thereto about a parallel axis, said second ,support 4overlying said first support and verhanging said base, a kerf cutter pivotallyV mounted on said `second support forv swinging movement'relative thereto, and motor operated devices for independently rotating said supports about their respective axes. j

43.1111 a mining apparatus, a portable base, a'support mounted on said base for rotation relative theretovabout a vertical axis, a second support-mounted on said first support for rotationY relative theretoA about av parallelaxis, said-second support overlying ,said first support Aand overhanging saidbase, a kerl cutter pivotally mounted on said second support for swinging movementfrelatve thereto, and motor operatedv devices for independently rotating said supportsY about their respective axes and including a motor mounted onsaid first support and relative to which the second support is rotatable for'rotating `fboth ofrsaid supports.

45. In a miningapparatus, a portable; base, Y

a horizontal turntable mounted on said base for rotation relative theretoabout a vertical axis and for adjustment .into different elevated positions relative to said base, a rotatable cutter head carrying a pivoted kerf cutter, an adjustable supporting structure onl which said cutter head is rotatably mounted, said supporting structure being mounted on said turntable and adjustable relative thereto to position the cutter head laterally relative to said turntable and base, said kerf cutter being rotatable with said head into horizontal and verticalv cutting positions, and motor operated devices for rotating` said turntable and for adjusting said supporting structure relative to said turntable.

46. In a mining apparatus, a portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis and for adjustment into different elevated positions relative to said base, a rotatable cutter head carrying a pivoted kerf cutter, an adjustable supporting structure on vwhich said cutter head is rotatably mounted, said supporting structure bef-` ing mounted on said turntable and adjustable relative thereto to position the cutter head laterally relative to said turntable and base, said kerf cutter being rotatable with said head into horizontal and vertical cutting positions, and motor operated devices for rotating said turntable and for adjusting said supporting structure relative to said turntable, said adjustable supporting structure and said turntable being simultaneously adjustable to position the kerf cutter when in its vertical cutting position in different parallel planes between the sides of said base.

47. In a mining apparatus, a portable base, a horizontal support mounted on said base for rotation relative to said base and for universal tilting movement relative to the horizontal, a. second horizontal support swingably mounted on said first support, said second support overlying said rst support and at its outerextremity overhanging said base, and a kerf cutter mounted on said outer overhanging extremity of said second support and located with its rear extremity wholly in advance of said base.

48. In a mining apparatus, a portable base, a horizontal support mounted on'said base for rotation relative to said base and for universal tilting movement relative to the horizontal, a second horizontal support horizontally swingably mounted on said rst support, said second support overlying said iirst support and at its outer extremity overlianging said base, and a kerf cutter mounted on said outer overhanging extremity of said second support, said second support being swingable laterally relative to said first support to position said kerf cutter into different. cutting positions to cut parallel spaced apart'kerfs between the sides of said base.

49. In a mining apparatus, a portable base, a horizontal support mounted on said base for universal tilting movement relative to the horizontal and for horizontal swinging movement, a second horizontal support swingably mounted on said first support for swinging laterally relative thereto, said second support overlying said iirst'support and at its outer extremity overhanging said base, a rotatable cutter head Vmounted on the outer overhanging extremity of said second support, and a kerf cutter pivotally mounted on said cutter head and adjustable with said head into different cutting positions aboutthe head axis including parallel vertical cutting positions at opposite sides of the head axis.

50. In a mining apparatus. a portable base, a

horizontal support mounted voii said base for universal tilting movement relative to the horizontal and for horizontal swinging, a second horizontal support swingably mounted on said first support, said second support overlying said rst support and at its outer extremity overhanging said base, a rotatable cutter head mounted on the outer overhanging extremity of said second support, and a kerf cutter pivotally mounted on said cutter head and adjustable with said head into different cutting positions about the head axis including parallel vertical cutting positions at opposite sides of the head axis, said second support being swingable relative to said first support on swinging of the latter to position said kerf cutter into different vertical cutting positions parallel with aforesaid vertical cutting positions between the sides of said base.

5l. In a mining apparatus, a portable base, a support mounted on said base for tilting movement relative thereto about a horizontal axis and ior horizontal swinging movement, a second support mounted on said first support to swing relative thereto about an axis perpendicular to a line parallel to a line parallel to the axis of tilting movement of said first support, said second support overlying said iirst support and at its outer extremity overlianging said base, and a kerf cutter mounted on the outer overlianging extremity of said second support to swing in a vertical plane relative thereto.

52. In a mining apparatus, a portable base, a support mounted on said base for tilting move-- ment relative thereto about a horizontal axis and for horizontal swinging relative thereto, a second support mounted on said rst support to swing relative thereto about an axis perpendicular to a line parallel to a line parallel. to the axis of tilting movement of said rst support, said second support overlying said first support and at its outer extremity overhanging said base, and a kerf cutter mounted on the outer overhanging extremity of said second support to swing in a vertical plane relative thereto and adjustable therewith laterally relative to said base into different vertical cutting positions parallel with a longitudinally extending vertical plane and aforesaid vertical plane.

53. In a mining apparatus, a portable base, a

support mounted on said base for tilting movement relative thereto about a horizontal axis and for horizontal swinging relative thereto, a second support mounted on said nrst support to swing relative thereto about an axis perpendicular to a line parallel to a line parallel to the axis of tilti ing movement of said first support, said second supportY overlying said rst support and at its outer extremity overhanging said base, a rotatable cutter head mounted on the outer overhanging extremity of said second support, and a kerf cutter pivotally mounted on said cutter head and adjustable with said head into different cutting positions about the head axis including parallel verticalcutting positions at opposite sides of the head axis, said second support being swingable laterally relative to said iirst support to move said cutter head to adjust said kerf cutter into difierent vertical cutting positions parallel with aforesaid vertical cutting positions between the sides ofV said base.

54. In a mining apparatus, a portable base,'a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a horizontal arm-like support mounted on said turntable to swing relative thereto about an axis parallel with the turntable axis, .saidsupport overlying said turntable andfat its outer 'extremity overhanging said base, mounted on the outer overhanging extremity `of said second support, and means lfor rotating said turntable and for swinging said 'support to move the kerf cutter into parallel cutting positions between the sides of said base.` l

55. In a mining apparatus, a portable base, a

rotation relative thereto about a vertical axis, a horizontal arm-like support mounted on said turntablev to swing relative thereto about an axis parallel lwith the turntable axis, said support overlying said turntable and at its outer extremity ovelhanging Vsaid base, a kerf cutter swingably mounted on lthe outer overhangingextremity of said second support, and means for rotating said turntable and for swinging said support to move the kerf cutter into parallel cutting positions including positions laterally beyond the sides of said base.

56. In .a mining apparatus, av portable base, a horizontal turntable mounted on said base for rotation relative thereto about a vertical axis, a horizontal arm-like support mounted on said turntable to swing relative thereto about an axis parallel with the turntable axis, said support overlying said turntable and at its router extremity 'horizontal turntable mounted onsaid base for overhanging said base, a kerf cutter swingablyV mounted `on the outer `overhanging extremity of said second support, and means for rotating'said turntable and for swinging said support to move the kerf cutter into parallel cutting positions including positions laterally beyond the sides of said base and a position midwaybetween the sides of said base.

57. In a miningv apparatus, a portable base, va support mounted on said base for rotation rela-f tive thereto about a vertical axis and for adjustment into different elevated positions'relative to said base, a second support mounted on said rst support to swinglrelative thereto aboutl aparallel axis,s'aid second support overlying said first support and at its outerY extremity overhanging said base, on the outer overhanging extremity of said second support.

58. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis and for adjustment into different elevated positions relative to said base, a second support mounted on said first support to swing relative thereto about a parallel axis, said second support overlying said first support and at its outer extremityoverhanging said base, and a cutter, head rotatably mounted onthe outer overhanging extremity of said second support, and a kerf cutter pivotally mounted on said cutter head and adjustable with said head about the head axis into different cutting positions. K

59. In a mining apparatus, a portable base,`a kerf cutter swing-able relative to said base to out a vertical kerf, and adjustable supporting means on said base for supporting said kerf cutter and adjustable to move said kerf cutter into' parallel vertical cutting positions between the sides of said base and including a plurality of relatively adjustable supports overlying said base in superimposed relation, one mounted on the other, jan`d rotatable relative to the base about parallel vertical axes located at the rear of the forward end of said base and motor operated devices for rotating said supports about their respective axes l independently.

a kerf cutter swingably.

and a kerf cutter swingably mounted.

. 60. In a mining apparatus, a portable base, a kerf cutter swingablerrelative to saidbase to cut avertical kerf, and adjustable supportingmeans on said base for supporting said kerfcutter and adjustable to move vertical cutting positions including. positions between `the sides of said baseand laterally beyond the sides of rality of relatively adjustable supports, one mounted in superimposedrelationon the other,` and rotatable relative to the base about parallel verticalV axes, one of said supports overhanging the other, said kerf cutting mounted on said overhanging support and motor operated devices for rotating said supports about their respective axes independently.

6l. In aV mining apparatus, a portable base, a kerf cutterswingable relative to said base to cut a verticalkerf, and on saidbase for supporting said kerf cutter and adjustable to move said kerf cutter into parallel vertical cutting positions between the sides 1 of said base and including a pluralityof relatively adjustable supports, one mounted on the other, said supports rotatable relativeto the .base about parallel vertical axes, one individual to each, and motor operated devices for rotating said supports abouttheir respective axes independently, one ofy saidsupports overlying said base and another support'mounted on fand overlying the other support and at itsiforward extremity overhanging' said base.

l 62. In a mining apparatus, a portable base, al kerf` cutter swingable relative to said base to out Y a verticalkerf, and adjustable supporting means on said base for supporting said kerf cutter and `adjustable to move said kerf cutter into parallel vertical cutting,V positions between the sides of said base and including a plurality of relatively ad` justable supports, one mounted in superimposed relation on the other, said supports rotatable relative to the base about parallel Vertical axes one individual to each, one support overhanging the other, said kerf cutter mounted on said overhangin'g support and motor operated devices for rotating said supportsindependently about their respective axes, said support mounted on the other support being movable, upon rotation of the other support relative to the base, bodily relative to the'base to positions base'tothe other.

. 63. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said rstsupport for rotation relative thereto about a parallel axis lying within the outline of said iirst support, said second support overlying said rst support and over# hanging said base, a kerf cutter mounted on the overhanging extremity of said second support and withits rear extremity located wholly in ad Vance of said base, and motor operated devicesI for independently rotatingsaid` supports about their'respective axes.

64.1In a mining apparatus, a portable base, a .supportmounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said rst support for rotation relative thereto about a parallel axis lying within the outline of said rst support, said second support overlying said rst support and overhanging said base, a kerf cutter mounted on said second support, and motoroperated devices for independently rotating saidsupports abouttheir respective axes and including a motor mounted said kerf cutter into parallel, 7

said base and including a plu- Y from' one side of the adjustable supporting means on one of said supports for rotating both supports.

65. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said iirst support for rotation relative thereto about a parallel axis lying within the outline oisaid first support, said second support overlying said iirst support and overhanging said base, a kerf cutter mounted on said second support, and motor operated devices for independently rotating said supports about their respective axes and including a motor mounted on said rst support and relative to which the second support is rotatable for rotating both oi said supports.

66. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis, said second support overlying said first support and overhanging said base, a lrerf cutter mounted on said second support, and motor operated devices for independently rotating said supports about their respective axes and orswinging said kerf cutter relative to said second support.

67. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis, said second support overlying said iirst support and overhanging said base, a kerf cutter mounted on said second support, and motor operated devices for independently rotating said supports about their respective axes and swinging said korf cutter relative to said second support, said devices including a motor mounted on one oi said supports.

68. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis, said second support overlying said first support and overhanging said base, a kerf cutter mounted on said second support, and motor operated devices for independently rotating said supports about their respective axes and swinging said keri cutter relative to said second support, said devices including a motor mounted on said first support and relative to which the second support is rotatable for rotating both of said supports.

69. In a mining apparatus, a portable base, a horizontal support mounted on said base for universal tilting movement relative to the horizontal, a second horizontal support swingably mounted on said first support, said second support overlying said first support and at its outer extremity over-hanging said base, a rotatable cutter head mounted on the outer ovei'hanging extremity of said second support, and a kerf cutter pivotally mounted on said cutter head and adjustable with said head into diiierent cutting positions about the head axis including parallel vertical cutting positions at opposite sidesof the head axis, said supports adjustable horizontally relative to said base to move the korf cutter into different parallel vertical Acutting positions.

70. In a mining apparatus, a portable base, a horizontal support mounted on said base for horizontal rotation and for universal tilting movement relative to the horizontal, a second horizontal support swingably `mounted on said first support, said second support overlying said first support and at its outer extremity overhanging said base, a rotatable cutter head mounted on the outer overhanging extremity of said second support, and a kerf cutter pivotally mounted onsaid cutter head and adjustable with said head into different cutting positions about the head axis including parallel vertical cutting positions at opposite sides of the head. axis, said second support being swingable horizontally relative to said first support to position said kerf cutter on rotation of said iirst support, intodii'- ferent vertical cutting positions between the sides of said base.

7l. In a mining apparatus, a portable base, a support mounted on said base for tilting movement relative thereto about a horizontal axis and for horizontal swinging relative thereto, a second support mounted on said first support to swing relative thereto about an yaxis perpendicular to the axis of tilting movement oi' said first support, said second support overlying said first support andat its outer extremity overhanging said base, and a kerf cutter mounted on the outer overhanging extremity of said second support to swing in a vertical plane relative thereto, said supports swingable horizontally relative to said base to move the kerf cutter to swing in parallel vertical planes parallel with aforesaid vertical plane.

72. In a mining apparatus, a portable base,

a support mounted on said base for tilting movement relative thereto about a horizontal axis and for horizontal swinging relative thereto, a second support mounted on said first support to swing relative thereto about an axis perpendicular to a line parallel to a line parallel to the axis ci tilting movement of said first support, said second support overlying said iirst support and at its outerextremity overhanging said base, and a kerf cutter mounted on the outer overhanging extremity of said second support to swing in ak vertical plane relative thereto and adjustable therewith laterally relative to said base, said kerf cutter adjustable horizontally with said supports into parallel vertical planes parallel with aforesaid vertical plane. l

, '73.'In a mining apparatus, a portable base, a support mounted on said 'base for horizontal swinging and for tilting movement relative thereto about a horizontal axis, a second support mounted on said rst support to swing relative thereto about an axis perpendicular to the axis of tilting movement of said first support, said second support overlying said iirst support and at its outer extremity overhanging said base, a rotatable cutter head mounted. on the outer overhanging extremity of said second support, and a kerf cutter pivotally mounted on said cutter head and adjustable with said head into different cutting positions about the head axis including parallel vertical cutting positions at opposite sides of the head axis, said second support being swingable laterally relative to said iirst support to move said cutter head to adjust said kerf cutter into different vertical cutting positions parallel with aforesaid vertical cutting positions and between the sides of said base.

74. In a mining apparatus, a portable base, a kerf cutter swingable relative to said base to cut a vertical kerf, and adjustable supporting means on said base for supporting said ker cutter and adjustable to move said kerf cutter into parallel vertical cutting positions between the sides of said base and including a plurality oi relatively adjustable supports, one mounted on the other and rotatable relative to the base about parallel tween the relative to the v tionary as regards swinging movement about its own axis and said support mounted on the other vertical axes and motor operated devices having a `driving motor carried onone of said supports :for independently rotating' said supports about their respective axes, either support swingable relative to the other whilethe latter remains stationary as regards swinginglmovement about its own axis.

75. In a mining apparatus, a portable base, a`

kerf cutterswingable relative to said base` to cut a vertical kerf, and adjustable supporting means on said base for supporting said kerf cutter and adjustable to move said kerf cutter into parallel vertical cutting positions including `position'sxbesides of said base and laterally beyond the sides of relatively adjustable supports, one mounted on the other, and rotatable relative to the base about parallel vertical axes and motor operated devices having a driving motor carried on one of said supports for independentlyrotating said supports about their respective axes, either support swingable relative to the other while theilatter re-` mains stationary as regards swinging movement about its own axis.

"76. In ainining apparatus, a portablebase, al

korf cutter swingable relative to said base to cut a lvertical Keri, and adjustable supporting means on said base for supporting said kerf cutter and adjustable to move said keri cutter into parallel vertical cutting positions between the sides of said base and including a plurality of relatively adjustable supports, one mounted on the other, and rotatable relative to the baseabout parallel vertical` axes andmo'tor operated devices having a` driving motor carried on one-of said supports iorfindependently' rotating said supports about theirirespective axes, either support swingable other while the latter remains stasuppcrt being movable, upon rotation of the other support relative to the base, bodily relative to the base to positions from one side of the base to the other. t

77. In a mining apparatus, a portable base, a horizontal support mounted on said base for rotation relative to said base upon a normally up- V right axis and for universal tilting movement relative to the horizontal, a second horizontal support swingably mounted on said rst support to swing relative thereto, said second support overlying said iirst support and at its outer extremity overhanging said base, and a pivoted kerlcutter mounted on said second support with its pivot located at the outer overhanging extremity of said second support in advance of said base.

78. In a mining apparatus, a portable base, a

horizontal support mounted on said base for rotation relative to said base upon a normally upright axis and for universal tilting movement relative to the horizontal, a second horizontal support swingably mounted on said first support to swing relative thereto, said second support overlying said first support and at its outer extremity overhanging said base, and a kerf cutter mounted on said outer overhanging extremity of said second support to swing in vertical planes relative thereto.

79. In a mining apparatus, a portable base, a horizontal support mounted on said base for rotation relative to said base upon a normally upright axis and for universal tilting movement relative to the horizontal, a second horizontal support swingably mounted on said first support of said base and including a pluralityk to' swing relative thereto, said second jsupport overlying said rst support and at its outer extremity overhanging said base, and a kerf cutter mountedon said outer overhanging extremity of said second support to swing in vertical planes rel-V to the horizontal, a second horizontal supportV swingably motuited on said iirst support to swing relative thereto', said second support `overlying said first support and at its outer extremity overhanging said base, a lierfcutter mounted on the outer overhanging extremity of said second support, and a motor mountedon one of said supports for rotating said i'lrst support and for swinging said second support. N

8l. In' avmining apparatus, a portable base, a horizontal support mounted l on `said base for rotation relative to said base upon a normally upright axis and for universal tilting movement relative to the horizontal, a second horizontal support swingably mounted on said rst support to swing relative thereto, said second support overlying said iirst support and at -its outer extremity overhanging Asaid base, a kerf cutter mountedon said outer overhanging extremity of said secondsupport, said second support being swingable laterally relative to said first support tof swing said kerf cutter into different cutting positions between the sides of said base, and a motor mounted on: one-of said supports for rotat` ing said first support and for swinging saidsecond Y support.

`82. In a mining apparatus, a portable base, a support mounted 'on said base for rotation relative? thereto about a vertical axis, a second support mounted on said iirst support for rotation relative thereto about a parallel axis lying within the outline of said iirst support, said second support `overlying said first support and overhanging said base, a kerf cutter mounted on said second support to swing in vertical planes relative thereto, and motor operated devices for independently rotating said supports` about their respective axes. y 83. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said rst support for rotation relative thereto about a parallel axis lying within the outline of said rst support, said second support overlying said first support and overhanging said base, 'a kerf cutter mounted on the overhanging extremity of said second support with its rear extremity located wholly in advance of said base, and motor operated devices for independently rotating said supports about their respective axes and including a motor mounted on one of said supports.

84. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis lying within the outline of said iirst support, said second support overlying said rst support and overhanging said base, a kerf cutter mounted on the overhanging extremity of said second support for swinging movement relative thereto, and motor operated devices for independently rotating said supports about their respective axes.

85.*In a mining apparatus, a portable base, a support mounted on said base for rotation relativethereto about a vertical axis, a second support mounted on said iirst support for rotation relative thereto about a parallel axis lying within the outline of said first support, said second support overlying said first support and overhanging said base, a kerf cutter mounted on said second support for swinging movement relative thereto, and motor operated devices for independently rotating said supports about their respective axes and including a motor mounted on one of said supports.

86. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis lying within the outline of said first support, said second support overlying said rst support and overhanging said base, a kerf cutter pivotally mounted on the outer overhanging extremity of said second support for swinging movement relative thereto about an axis located a substantial distance in advance of said base, and motor operated devices for independently rotating said supports about their respective axes and including a motor mounted on one of said supports.

87. In a mining apparatus, a portable base, a support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said first support for rotation relative thereto about a parallel axis lying within the outline of said first support, said second support overlying said first support and overhanging said base, a kerf cutter mounted on said second support to swing in vertical planes, and motor operated devices for independently rotating said supports about their respective axes.

88. In a mining apparatus, a portable base, a

support mounted on said base for rotation relative thereto about a vertical axis, a second support mounted on said rst support for rotation relative thereto about a parallel axis lying within the outline of said iirst support, said second support overlying said rst support and overhanging said base, a kerf cutter mounted on said second support to swing in vertical planes, and

motor operated devices for independently rotat' ing said supports about their respective axes and including a motor mounted on one of said supports.

89. In a mining apparatus, a portable base, a turntable mounted for rotation on said base and for adjustment vertically relative thereto, an arm structure mounted on and overlying said turntable, said arm structure swingable relative to said turntable, and a rotatable cutter head mounted on the outer overhanging extremity of said arm structure and carrying a kerf cutter.

90. In a mining apparatus, a portable base, a rotatable turntable mounted on said base for universal tilting movement relative thereto, an arm structure mounted on and overlying said turntable, said arm structure swingable horizontally relative to said turntable, and a rotatabley cutter head mounted on the outer overhanging extremity of said arm structure and carrying a kerf cutter.

91. In a mining apparatus, a portable base, a support mounted on said base for tilting movement relative thereto about a horizontal axis, an arm structure pivotally mounted upon a substantially upright axis on the forward end of said support for swinging movement relative thereto, said arm structure being adjustable horizontally relative to said base, a cutter head rotatably mounted on the outer extremity of said arm structure, and a kerf cutter pivotally mounted on said cutter head.

LOUIS A. MAXSON.V