US2007817A - Mining machine - Google Patents

Description

July 9, 1935. w. SLOANE 2,007,817

MINING MACHINE Original Filed July 14, 1930 6 Sheets-Sheet 1 Jnuazfol .Fufly 9, 1935.

W. W. SLOANE MINING MACHINE ZMU'ZR 7 Original Filed July 14, 1950 6 Sheets-Sheet 2 July 9, 1935. w. w. SLOANE fiwfiw MINING MACHINE Original Filed July 14, 1 930 .6 Sheets-Sheet 3 M w *1 a 23 i l w :70

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gl7 32 as July 9, 1935. w. w. SLOANE MINING MACHINE Original Filed July 14, 1950 6 Sheets-Sheet 5 July 9,1935. w. w. SLOANE MINING MACHINE 6 Sheets-Sheet 6 Original Filed July 14, 1930 I I I I ZTZ ICIZZJI" wz'ZZz'a/ z 'ZdJZoanc Patented July 9, 1935 zbotsiz William W. Sloane, Ch c o Ill., 'assignor to Goodman Manufacturing Company, Chicago, IlL, a corporation of Illinois Application July 14, 1930, Serial Renewed October 6, 1934' 33 Claims. (crate-W28) This invention relates to improvements in mining machines and more particularly to machines of the truck mounted type having projecting kerf cutting elements thereon for makingver- 5 tical and shearing cuts in the mine wall. a

' This invention has, among other objects, to provide a new and improved mining machine particularly adapted for operation in coal mines which may cut a horizontal kerfadjacent the "10 mine floor orat various elevations with respect thereto, and which may also cut a vertical or shearing kerf without tal cutting element, from the coal.

In carrying out my invention,.I utilize a ma- 7 arm adapted to cut a horizontal kerf in the mine wallywhich machine may be similar to that disclosed in a prior applicatiom'serial No..402,505, of William T. McCullough, filed October 25, 1929, which issued as Patent No. 1,938,850, December 12, 1933, but which has, in addition, an extensibleand retractable cutting element mounted thereon for making a vertical out when the horizontal cutting element is sumped in aminewall.

My invention may be more clearly understood with reference to the accompanying drawings whereini 7 Figure 1 ma top plan view of one embodiment of my invention with parts ,broken away andin section; v v 1 "Figure 21s a side elevation of the device shown in Figure '1 with certain ,parts broken away and in section;

Figure 3 is a side elevation of the device shown in Figure 1 taken on the oppositeside of the machine from Figure 2 with certain parts broken away and in section;

Figure 4 is a partial enlarged fragmentary sectional view takenon line 4-4 of Figure 1;

Figure 5 is an enlarged partial fragmentary plan view of the machine with parts broken away and in section to more clearly show the details of my invention;

Figure 6 is a partial fragmentary sectional view taken on line 6-8 of Figure 5; 1 Figure 7 is an enlarged partial fragmentary sectional view taken on line I-1 of Figure 5;

Figure 8 is a schematic wiring diagram of the motors for the undercutting and shearing elements; and i Figures 9, 10, ll, 12, 13 and 14 are diagram- ,matic views of the machine showing the various cutting positions thereof.

Like numerals refer to likeparts throughout the various figures,

sideof the center of said turntable and withdrawing the horizon-,

chine of the truck mounted type having a'cutter through a spur gear reduction drive 7 cutting herein motor having'a cutter frame 24 projecting for- I wardly therefrom beyond the boundaries of the '50 Referring'now in particular to the drawings, the embodiment of my invention illustrated in- I cludes a truck I mounted on track wheels 2 and axles having a turntable 4 thereon; A horizontally disposed cutting element 5, adapted to 5 cut a horizontal kerf'in the minewall, is mounted on the turntable 4 for movement therewith. The

horizontally disposed cutting, element 5 is trun-' nioned on the turntable 4 on a transverse axis near the forward end thereof and offset to one 10 is yieldably supported at its rearward end on said turntable in a usual manner for adjusting the positionof said cutting element with respect to said turntable. An extensible and retractable cut- 5 ting element Lmovable in a vertical planeto cut a shearing kerf in the mine wall, is mounted onthe turntable 4 to one side of the horizontallydisposed cutting element. 5.

The turntable 4 is rotated bymeans of a motor 2 '9 on the truck I near the rearward end thereof through suitable reduction gearing which herein comprises a motor pinion I 0, a spur gear I I driven thereby, a transverse shaft I2 rotated by said gear, and a worm and worm-gear drive indicated 25 at it for operatively connecting said transverse shaft with a vertical shaft -I4. A spur gear I5 is fixed to the lower end of said vertical shaft and meshes and drives a spur gear I6 which drives a spur gear I! coaxial with the spur gear '30 I6, which'spur gear meshes with teeth I8 on the outer periphery-of said turntable for rotating said turntable.

The truck I may be propelled about the mine at either a high speed or a low feeding speed by 35 means of the motor 9 by means of a suitable chain and sprocket drive (not shown) driven by a drive sprocket I 9, which drive sprocket as herein shown, is driven from the transverseshaft. I2

generally 40 indicated at 2| in the usual manner. 7

The horizontally disposed cutting element 5 is similar to that disclosed in .the aforementioned prior application of William McCullough so will only herein be described insofar as is necessary to clearly illustrate my present invention. Said element includes a motor 23 which is. preferably shown as being an electric truck I. A cutter head 25 is suspended beneath the cutter frame 24 and is movable vertically with respect thereto in guides 26, 26 and has a cutter bar 2'! projecting forwardly therefrom.

Said cutter bar is mounted for pivotal movement .is provided on the top about a vertical axis disposed adjacent its rearward end and forwardly of said truck for adjustment for cutting along a mine bottom in front of and to each side of the track and has a cutter chain 28 movable thereabout. Said cutter chain is driven from the motor 23 by a suitable gear train generally indicated at 22 in a usual manner. Suitable. locking means are provided for locking said cutter bar in various positions of angular adjustment with respect to said cutter frame which may be of a usual construction so will not herein be shown in detail.

Referring now in particular to the details of the extensible and retractable cutting element 1 which forms one of the novel features of my invention, said cutting element includes a motor 29 slidable longitudinally of the turntable 4 in guides generally indicated at 38, fixed to said turntable and disposed in parallel relation to the cutting element 5. her 3|flxed on said turntable in a suitable manner-as is shown in Figure 7, which member. projects forwardly therefrom beyond the boundaries of the truck I. An outer side 32 of the member 3| extends vertically upwardly and inwardly to engage the outside and a portion of the top of the motor 29. An inner side 33 of the member 3| extends vertically upwardly from said member and has a groove 34 formed therein engaged by a foot 35' integral with the motor 29. A rack 36 portion of the inner side 33 of the member 3|, which rack is engaged by a pinion 31 on a stub shaft 38 for moving the motor 29 and cutting element 1 along the member 3| in the guides 30.

A portion 39. of the casing for the. motor 29 extends upwardly and outwardly therefrom and forms a bearing support for various; parts of the cutting element 1. A cutter bar supporting member 48 is journalled in the portion 39 for pivotal movement with respect thereto about a transverse axis. from the portion 39 of the casing of the motor 28 and abuts a shoulder 42 formed in the cutter bar supporting member 40. A ring 43 is fastened to said cutter bar supporting member and abuts the inner face of the flange 4| to prevent lateral movement of said cutter bar supporting member 4 0 with respect to the portion 39. This ring may be held; to said cutter bar supporting member by any suitable means, but as herein shown said ringis held to said cutter bar supporting member by means of cap screws 44 (see Figures 4 and 51) The cutter bar supporting member 48 extends forwardly from the portion 39 of the casing for the motor 29 and has a cutter bar 45 fixed thereto having a cutter chain 45 movable thereabout. A vertically disposed arcuate rack 41 is fixed onfthe-forwardmost portion of said cutter bar supporting member and has internally cut teeth facing the rearward end of said cutting element. Said arcuate rack is engaged by a pinion 48 on the end of a, transverse shaft 49 driven from the motor 29 ina manner which will hereinafter be morefullydescribed. Thus rotation of the pinion 48 causes movement of the arcuate rack .41 and moves the cutter bar 45 about the axis ofconnection of said cutter bar supporting member to the portion 38 of said motor casing.

Referring now in particular to the means for driving the. cutter chain 46 from the motor 29, said motor is provided with a bevel armature pinion 58 which'meshes with and drives a bevel geaitil ona. transverse shaft 53. A. spur gear Said guides include a mem- A flange 4| extends outwardly 55 is fixed on said transverse shaft and meshes with and drives a spur gear 56 on a transverse shaft 51 located above the transverse shaft 53. The transverse shaft 51 is journalled within a bored portion 58 of the cutter bar supporting member 48 by suitable means herein shown as ball bearings of an ordinary construction (see Figure v A member 88 is keyed on the transverse shaft 51 and journalled in the bored portion 58 of the cutter bar supporting member 48 and is held to said transverse shaft by means of a nut 62. A collar 65 abuts the outer surface of the cutter bar supporting member 48 while a sprocket 53 is fixed on the member 58 and is interposed between the outer end of said collar and a flange t4 integral with the outer end of said member. The sprocket 83 meshes with the cutter chain 46 for driving said cutter chain upon rotation of the motor 29.

Referring now in particular to Figures 5 and 7 and the details of the mechanism for driving the pinions 31 and 48 for moving the cutting element along the guides 38 or for raising or lowering said cutting element about the axis of the transverse shaft 51, a bevel pinion 61 is fixed on the inner end of said transverse shaft and is held thereto by means of a nut 68. This bevel pinion meshes with and drives a bevel gear 69 keyed on a longitudinally extending horizontal shaft 10. A spur pinion 1| is and drives a spur pinion 13 on a longitudinally extending stud shaft 14 located above the shaft "iii. A spur gear 15 is keyed near the opposite end .of the longitudinally extending horizontal shaft '18 adjacent the inner end of a bearing support 16 for said shaft. The spur pinion 13 meshes with and drives spur gears 11 and 13. on opposite sides thereof, while the spur gear 1'5 meshes with and drives spur gears 18 and 88 on opposite sides thereof respectively in opposite directions to the spur gears 11 and 18.

The spur gear 11 is fixed on the rearward portion of a casing 8| for a clutch 32. The casing 8| is freely mounted on a shaft 83 and is journalled in a bearing support 84. The clutch 82 is a friction clutch of an ordinary construction so will not herein be described in detail and has operative connection with the shaft 83 for driving said shaft through a clutch collar 85 feathered on said shaft. 7

Similarly the spur gear 19 is fixed on a casing 85, freely mounted on its hub in a suitable bearing member and a bored portion of the hub of said casing forms a bearing for the shaft 83. The casing 88 forms a driving member for a clutch 88 whichv is a. suitable friction disc clutch of an ordinary construction so will not herein be described indetail. vThe clutch 88 is operatively connectible with the shaft 83 for driving said shaft by means of the clutch collar 85.

When the clutch collar 85 is in 'a central position on the shaft 83 intermediate the clutches 82 and 88, neither of said clutches have driving engagement with said shaft. Thus when the clutch collar 85 is'moved adjacent the clutch 82, the shaft 83 is driven in one direction through said clutch andwhen the clutch collar 85 is moved adjacent the clutch 88, the shaft 83 is driven in an opposite direction through the clutch 88. A suitable system of levers is provided to move the clutch collar along the shaft 83 to operatively engage either the clutch 82 or the clutch 88 with the shaft 83, which systemof levers is of an ordinary construction so is not. herein shown. Thus a means has been provided for. driving the shaft fixed on the shaft 18' and meshes with V transverse shaft- 49.

1M keyed on clutch 91 which clutch is a friction clutch of an ordinary construction and is operatively conclutch collar 99 feathered to said shaft. c Similarly the spur gear at is mounted on a clutch casing I06 for a clutch .IM. This clutch is operatively connected to the longitudinal shaft 96 by means of the clutch collar 99 in a usual manner for driving said shaft. The construction of the clutches 91 and")! is to the construction of the clutches 82 The opposite clutch also may be connected to said shaft to drive said shaft in an opposite direction upon disengagement ofcsaid first mentioned clutch from said shaft. t

A worm I 93 (see Figures 5 and 6) is keyedon the longitudinal shaft 96 near the forward end thereof and mesheswith and drives a worm gear the transverse shaft 49 for driving said shaft. It may thus be seen that rotation of the shaft 49 drives the pinion 48 which moves the rack 41 and cutterbar 45 with respect to said pinion about the axis of the shaft 57 to vertically move said cutter bar. The" direction of vertical movement of the cutter-bar 45 may be reversed by engagingeither of the clutches 91 or in! with the shaft 95.

It maythus be seen that tical cut in the mine wall, are driven from a single motor so that the longitudinal and vertical movements are independent of each other and so that both ofisaid movements .may be independently reversed without reversal of the motor 29.

The motor 23, which operates thehorizontally is electrically interdisposed cutting element 5, I connected with the motor29 which operates the extensible and retractable cutting element .1 by

means of a switch 1050f an ordinary construe controller I06 controls inclusive, which and that said means tion and diagrammatically illustrated in Figure 8, so that both of said motors may be operated from a single controller I66 and so that only one of these motors may be operated at a time.

the operation of the motors 23 and 29in a usual manner and obtains power fromva cable reel I01 through suitable conductors ina usualmanner so that the details of operation and construction Referring now in particular to Figures 9 to 14, figures diagrammatically show the machine of my invention in various cutting positions, the horizontal cutter bar 27 is sumped said cutterbar is cutting across the coal face, the cutter bar 45' is in a retracted position in the guides 30.7 When it is desiredto make a vertical or shearing cut, movement of the cutter, bar' 27 across the face is stopped and the cutter bar 45 is usually raisedby the pinion 48 and arcuate rack 41 until the upper forward end of the cutter bar abuts the mine roof as indicated by dotted cutting element from the coal.

Although I have herein shown and described one form in which my invention may beembodied, it will be understood that the construcof said truck and adapted to cut excepting as it may be limited by the appended claims.

I claim as my invention:

1. In a mining machine, a support, cutting mechanism thereon including a horizontal swinging projecting cutter bar adapted to out a horizontal keri in the mine wall by swinging movement with respect to said support about a vertical axis and a horizontally extensible and retractable cutter bar adapted to cut'a vertical kerf in the mine wall by horizontal translational movement with respect to said support'and pivotal movement about a horizontal axis.

2. In a mining machine, a support, cutting mechanism thereon including a horizontal swinging projecting cutter bar adapted to cut a horizontal kerf in the mine wall by swinging movement with respect to said support about a vertical axis and a vertical horizontally extensible and retractable cutter bar adapted to cut a vertical kerfin the mine wall by horizontal translational movement with respect to said support and pivotal movement'about a horizontal axis,said vertical cutter bar being supported adjacent said'horizontal cutter bar and movable longitudinally of said horizontal cutter bar.

3. In a mining machine, horizontal and shearing cutting mechanism therefor including a cutting element having a swinging projecting cutter bar adapted to cut a horizontal k'eri inthe'mine wall and a horizontally extensible and retractable cutting element adapted to outer vertical kerf in the mine wall having a vertically arranged cutter bar having a cutter chain'movable thereabout, gear reduction mechanism for driving said cutter chain about said cutter bar, said vertical cutter bar being closely adjacent said horizontal cutting element and said gear reduction mechanism being'disposed on the outer side of said horizontal kerf cutting element and extending away from said horizontal cutting element.

1. In a mining machine, horizontal and shearing cutting mechanism therefor including a cutting element having a swinging projecting cutter bar adapted to cut a horizontal kerf in the mine wall and a horizontally extensible and retractable cutting element adapted to cut a vertical kerf in the mine wall, said extensible and retractable cutting element including a vertical cutter bar disposed adjacent said horizontal cutting element and mechanism for extending said extensible and retractable cutting element disposed to one side thereof away from said horizontal cutting element. e

5. In a mining machine, a track-mounted truck, horizontal and vertical cutting mechanism supported on said truck including a forwardly projecting cutter bar mounted for pivotal movement about a vertical axis disposed forwardly a horizontal kerf adjacent the mine bottom, and a second cut ter bar arranged to one side of said first cutter bar and pivotally mounted on a support for movement in a vertical plane, saidsupport being extensible and retractable with respect to said truck to move said cutter bar horizontally and position said cutter bar to cut akerf intersecting the cutting plane of said first-mentioned cutter bar.

- 6. In a track-mounted mining machine, a truck, a, turntable on said truck, power means for moving said truck at feeding and traveling speeds and power means for swinging said turntable, and horizontal and shearing cutting mechanism on sa d turntable including a projecting cutter bar pending cutter bar adapted to cut a horizontal keri in a mine wall, and a vertical cutter bar arranged along side of said first=mentioned cutter bar for translational movement with respect thereto in a horizontal plane and pivotal movement in a'vertical plane for cutting a vertical kerf in the mine wall.

7. In a truck mounted mining machine, a turntable, and horizontal and shearing cutting mechanism thereon including a horizontal cutter bar adapted to out a horizontal kerf adjacent the mine bottom or at various elevations with respect thereto and another cutter bar pivotally movable about a horizontal axis adjacent its rearward end adapted to out a shearing keri in the mine wall.

8. In a truck mounted mining machine, a turntable, and horizontal and shearing cut ing mechanism thereon including a horizontal cutter bar adapted to cut a horizontal keri adjacent the mine bottom or at various elevations with respect thereto and a retractable cutter bar adapted to cut a vertical kerf in the mine wall.

9. In a truck mounted mining machine, a turntable, and horizontal and shearing cutting mechanism mounted on said turntable including a horizontal cutter bar offset from the axis thereof and adapted to cut a horizontal kerf adjacent the mine bottom, and a horizontally extensible cutter bar mounted on said turntable adjacent said horizontal cutter bar and movable longitudinally of said horizontal cutter bar.

10.1n a truck mounted. mining machine, a turntable, and horizontal and shearing cutting mechanism mounted on said turntable including a horizontal cutting element offset from the axis thereof and having a forwardly projecting deadapted to cut a horizontal kerf adjacent the mine bottom, and a horizontally extensible and retractable cuttingelement adjacent said horizontal cutting element having a cutter bar thereon, movable longitudinally of said horizontal cutting element.

11. In a truck mounted mining machine, a turntable, and horizontal and shearing cutting mechanism mounted on said turntable including a horizontal cutting element offset from the axis thereof and having a forwardly projecting depending cutter bar adapted to cut a horizontal kerf adjacent the mine bottom, and a horizontally extensible and retractable cutting element adjacent said horizontal cutting element comprising a motor, a cutter .bar pivotally movable with respect to said motor about a horizontal axis, and means connectible with said motor for moving saidcutter barlongitudinally of said first mentioned horizontal cutting element.

12. In a truck mounted mining machine, a turntable, horizontal and shearing cutting mechanism thereon including ahorizontal cutting element having a forwardly projecting cutter bar adapted to cut a horizontal kerf adjacent the mine bottom, and a horizontally extensible and retractable cutting element adjacent saidhorizontal cutting element including a motor, a cutter bar pivotally movable with respect to said motor about a horizontal axis, means connectible with said motor for moving said cutter bar about said horizontal axis and means connectible with said motor for moving said second mentioned cutting element longitudinally with respect to said first mentioned horizontal cutting element.

13. In a truck mounted mining machine, a turntable, a horizontal and shearing cutting mechanism thereon including a horizontal cuttingelement having a forwardly projecting cuthorizontally extensible and gotten said second mentioned cutting element longie 19.'In' a track first mentioned respect to said horizontal cutting element.

14. In a track mounted mining machine,

truck, horizontal and shearing cutting mecha nism on said truck including a projecting cutter 'bar adapted to cut ahorizontalkerf in the mine wall by movement of the truck with respect to the coal face and swinging movement of said 15. In a track truck, horizontal and shearing cutting mechanism on said truck including a projecting cutter bar adaptedto cut a horizontal kerf'in the, mine Wall by movement of the truck with respect to the coal face and swinging movement of said cutter bar across the front'ofr the truck and a pivotally movable horizontally extensible cutter bar adapted to cut a vertical kerf inthe mine wall mounted on said truck-adjacent said'horizontal cutter bar and movable longitudinally of said horizontal cutter bar. l a 1 T.

' 16. In a track. mounted mining machine, a truck, horizontal andshearing cutting mechanism onsaid truck including a cutting element havinga projecting cutter bar adapted to cut a horizontal kerf in the mine wall by movement of the truck with respect to the coal face and swinging movement of said cutter bar across the front of the truck anda pivotally movable horizontally extensible andretractablecutting element adjacent said first mentioned cutting element havingia projecting'cutter bar thereon movable longitudinally of said first mentioned cutting element;

a 17.In.'a. track mounted mining machine, a

said truck, and horizontal.

truck, aturntable on' i V and shearing l'cutting mechanism on said turntable including'a projecting cutter bar adapted to cut a horizontal. kerf ina mine wall, and another I cutter bar movable in a vertical, .plane about a horizontal pivotal axis adaptedto cut a vertical kerf in-the mine wall.

18 In [a track truck, a turntable on said truck, and horizontal and shearingzcutting mechanism. on said turntable includin'ga projecting cutter bar adapted to out a'horizontal kerf in a mine Wall, and a hori 'zontally extensible and retractable cutter Ibar adaptedto cut ,avertical kerf in the minewall.

mounted mining machine, a truck, a turntable'on said truck, and horizontal and shearingcutting mechanism on said turn table including a projecting cutter' bar adapted to cut a horizontal' kerf' in a mine wall, and a horif zontallyl extensible and retractable"' cutter bar mounted on'saidturntable adjacent one side of said projectingcutter bar and movable longitudinally of said projecting cutter bar.

cutting element adjacent said mounted I mining machine, a

mounted mining machine, a

, I s 20. In a trackimountedimining machine, a truck, a turntable on said truck, and horizontal ment having a cutter bar thereon movable longitudinally of said horizontal cutting element for cutting a vertical 'kerffin thelmine wall. v

- 21. In a truck mounted mining machine, a turntable, horizontal and shearing cutting mechanism thereon including ment'having a forwardly projectingcutter bar adapted to cut a horizontal kerf in the minewall, and a horizontally extensible and retractable cutsecond mentioned cutting a horizontal cutting eleof said horizontal cutting element and reciprocably'moving said cutter bar about said horizontal axis independently or simultaneously withhold zontal movement of said secondmentionedcutting element comprising a longitudinal shaft havingconnection with said mo'tonand a pair 01 parallel shafts adapted to be driven from'said in reverse directions without reversing the dire tuclinal shaft. '22.In a'truck mounted mining machine, a turntable, horizontal and shearing cutting mechanism thereon including a horizontal cutting element having a forwardly projecting cutter bar adapted to cut a horizontal k erf in the'mineiwall, and a horizontally extensible and retractable cutting element adjacent said horizontal cutamsm thereon including a horizontal cutting elea forwardly projecting cutter bar ment-having adapted to cut a horizontal kerf in the'mine wall, andla horizontally extensible V and" retractable cutting element adjacent said horizontal cutting element movable longitudinally tion of rotation of said longi- 1 W1 respect cutter cutting element and reciprocably moving said bar about said horizontal axis independently of or simultaneously with horizontal movement of said second mentioned cutting element comprising a longitudinal shaft having connection with said motor, a pair of parallel shafts adapted to be driven from said longitudinal shaft in reverse directions without reversing the direc tion of rotation of said longitudinal shaft, and a transverse shaft forwardly of said motor opcratively connectible with one of said parallel shafts, and having coaxial gear means freely mounted thereon driven from said other parallel shaft. 1 t t 24. In a truck mounted mining machine, a turntable, horizontal'and shearing cutting mechanismthereon including a horizontal cutting ele In'ent having a forwardly projecting cutter bar adapted'to cut a horizontal kerf in the mine wall, and'a horizontally extensible and retractable cuttingelement adjacent said horizontal cutting element movable longitudinally with respect thereto, said horizontally extensible and retractible cutting element comprising'a motor, a cutter bar 'pivotally movable about a horizontal. axis with respect to said motor, and means 'connoctible with said motor for reciprocably moving said second mentioned cutting element longitudinally of said horizontal cutting element and reciprocably moving said cutter bar about said horizontal axis independently'of or'simulta'neously with horizontal movement of said second mentioned cutting element, an arcuate rack having fixed connection with said cutter bar, a longitudinally ex.- tending rack 'fixed to said turntable parallel to said horizontal cutting element, and a transverse shaft having means coaxial therewith for moving said arcuate rack about the pivotal axis of said'cutter bar, and for moving saidsecond mentioned cutting element with respect to said longitudinally extending rack.

25. In a truck mounted mining machine, a

turntable, horizontal and shearing cutting mechanism thereon including a horizontal cutting element having 'a forwardly projecting cutter bar adapted toc ut a horizontal 'kerf in the mine wall, and a horizontally extensible and retractable cutting element adjacent said horizontal cuttingelement movable longitudinally with respect thereto, said horizontally extensible and retractiblecutting element comprising a motor, a cutter bar pivotally movable about a horizontal axis with respect to saidmotor, and means connectible with said motor for reciprocably moving said second mentioned cutting element longitudinally of said horizontalcutting element and reciprocably moving said cutter bar about said 'horizontal axis'in'depende'ntly of or simultaneously with horizontal'movement of I said second mentioned cutting element, an-arcuate rack having fixed connection with said cutter bar, a longitudinally extending rack hired to said turntable parallel to'said horizontal cutting element, atransverse shaft having" means coaxial therewith for moving said rack about the pivotal axis of said cutter bar' and havingothermeans coaxial therewith for moving said second mentioned utting element with respect to said longitudinallyflextending rack, v

26.In"a truck mounted mining machine, -a turntable, horizontal and shearing cutting mechan'ifsm thereon including a horizontal cutting element having; a forwardlyproj'ecting cutter bar adapted to" out ajhorizontal' e'rr m me m n wall, and a horizontally:extensible andretractable cutting element adjacent said horizontal cutting element movable longitudinally with respect thereto, said horizontally extensible and retractible cutting element comprising a motor, a cutter bar pivotally axis with respect to said motor, and means connectible with said motor for reciprocably moving said second mentioned cutting element longitudinally of said horizontal cutting element and reciprocably moving said cutter bar about said horizontal axis independently of or simultaneously with horizontal movement of Said second mentioned cutting element, an arcuate rack having fixed connection with said cutter bar, a longitudinally extending rack fixed to said turntable parallel to said horizontal cutting element, a transverse shaft having means coaxial therewith for moving said rack about the pivotal axis of said cutter bar and having other means coaxial therewith for moving said second mentioned cutting element with respect to said longitudinally extending rack, and means for driving said first and second mentioned means simultaneously with or independently of each other comprising a plurality of parallel driving shafts having operative connection with said motor.

27. In a truck mounted mining machine, a turntable, horizontal and shearing cutting mechanism thereon including a horizontal cutting element having a forwardly projecting cutter bar adapted to cut a horizontal kerf in the mine wall, and a horizontally extensible and retractable cutting element adjacent said horizontal cutting element movable longitudinally with respect thereto, said horizontally extensible and retractible cutting element comprising a motor, a cutter bar pivotally movable about a horizontal axis with respect to' said motor, and means connectible with said motor for reciprocably moving said second mentioned cutting element longitudinally of said horizontal cutting element and reciprocably moving said cutter bar about said horizontal axis independently of or simultaneously with horizontal movement of said second mentioned cutting element, an arcuate rack having fixed connection with said cutter bar, a longitudinally extending rack fixed to said turntable parallel to said horizontal cutting element, a transverse shaft having means coaxial therewith for moving said rack about the pivotal'axis of said cutter bar and having other means co,- axial therewith for moving said second mentioned cuttingelement'with respect to said longitudinally extending rack, and 'means for driving said first and second mentioned means simultaneously or independently of each other in reverse directions without reversal of said motor comprising a plurality of parallel driving shafts having operative connection with said motor.

28. In a truck mounted mining machine, a turntable, horizontal and shearing cutting mech anism thereon including a horizontal cutting element having a forwardly projecting cutter bar adapted to cut a horizontal kerf in the mine wall, and ahorizontally extensible and retractable cutting element adjacent said horizontal cutting element movable longitudinally with respect thereto, said horizontally extensible and retractible cutting element comprising a motor, a cutter bar pivotally movable about a horizontal axis 'withrespect to said motor, and means connectible "with said motor for reciprocably moving said second mentioned cutting element longitudinally of said horizontal cutting element and 'reciprocably moving said cutter bar about said horizontal'axis movable about a horizontal I independently of'or simultaneously with hori-' zontal movement of' said second mentioned cutting element, an arcuate rack having'fixed connection with said cutterbar, a longitudinally extending rack fixed to said turntable parallel to said horizontal cutting element, a transverse shaft having'means coaxial therewith for moving said rack about the pivotal axis of said cutter bar and having other means coaxial therewith for moving said second mentioned cutting element with respect 'to said longitudinally extending rack, and means for driving said first and second mentioned means simultaneously with or independently of each other in reverse directions without reversal of said motor comprising a plurality of parallel driving shaftshaving operative connection with said motor,a'nd means for driving said shafts fromsaid motor with-out reversal of said motor. t l

29. In a truck mounted mining machine, a turntable, cutting mechanism on said turntable adapted to cut a horizontal kerf adjacent the mine bottom or at various elevations with. respect thereto including a'motor, a cutter bar having a cutter chain movable thereabout driven from said motor, and a horizontally extensible and retractable cutting element adjacent said first mentioned cutting mechanism including a motor, a cutter bar having a cutter chain movable thereabout driven from said motor'and means for interconnecting said first and second mentioned motors to prevent driving ,one'of said cutter chains while.

said other cutter chain is being driven.

30. In a truck mounted mining machine, a turntable, cutting mechanism on said turntable adapted tocut a horizontal kerf adjacent'the mine bottom or at various elevations with respect thereto including a motor, a cutter bar having a cutter chain movable thereabout driven from said motor, and a horizontally extensible and retractable cutting element adjacent said firstmentioned cutting mechanism including a motor, a cutter bar having a cutter chain movable thereabout driven from said motor and means for electrically interconnecting said. first and second mentioned motors to prevent driving one of. said cutter chains while said other cutter chain is being driven. j

31. In a truck mounted mining machine, a turntable, cutting mechanism onsaid turntable adapted to cut a horizontal kerf adjacent the minebottom including a motor and a depending cutter bar having a cutter chain movable thereabout, and other cutting mechanism on said turntable for cutting a shearing kerf in the mine wall.

without Withdrawing said first mentioned cutter bar from the mine wall comprising a horizontally extensible and retractable cutting element.

32. In a truck mounted mining machine, a

turntable, cutting mechanism on said turntable adapted to cut a horizontal kerf adajacent the mine bottom including a motor and a depending cutter bar having a cutter chain movable thereabout, and other cutting mechanism'on said turn table for cutting a shearing kerf in the mine wall without withdrawing said first mentionedcutter bar from the mine ,wall comprising a horizontally extensible and retractable cutting element including a motor, a cutter bar arcuately movable ina vertical plane about a horizontal axis and having a cutter chain movable thereabout driven from said motor. V

V 33. In a truck mounted mining machine, a turntable, cutting mechanism on said turntable adapted to out a horizontal kerf adjacent the mine bottom including a motor and a depending cutter bar having a cutter chain movable thereabout, and other cutting mechanism on said turntable for cutting a shearing kerf in the mine wall without withdrawing said first mentioned cutter bar from the mine wall comprising a horizontally extensible and retractible cutting element including a'motor, a cutter bar arcuately movable in a vertical plane about a horizontal axis and having a cutter chain movable thereabout driven from said motor, and means for interconnecting said first and second mentioned cutting mechanisms to prevent operation of one of said cutting mecha nisms whilejsaid other cutting mechanism is in operation. c r

a 7 WILLIAM W. SLOANE.

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