US1785974A - Mining apparatus - Google Patents

Description

Dec. 23, 1 930. c. hoseoon MINING APPARATUS Filed Oct. 9, 1926 5 Sheets-Sheet l g y 3 5% w w wm Maw/W Q 4 W? WM? H43 7 Dec. 23, 1930. c. F. ossoon 4 MINII/JG APPARATUS I Fil ed Oct. 9, 3 926 5 Sheets-Sheet 3 Patented Dec. 23, 1930 untrue STATES PATENT OFFICE CHARLES F. OSGOOD, OF CLABEMONT, NEW HAMPSHIRE, ASSIGNOR TO SULLIVAN MA- CHINERY COMPANY, A CORPORATION OF IJIASSACHUSETTS Il-EININ'G APPARATUS Application filed October 9, 1926.

This invention relates to mining apparatus and more particularly to mining machines of the so called shear or vertical cutter type adapted to operate from the mine trackway.

All object of this invention is to provide an improved mining machine of the wheel mounted type wherein the mining machine is adapted to insert a shear or vertical cut in the coal face while mounted on the mine trackway. Still another object of this invention is to provide an improved shearing machine having a pivoted cutter bar and improved and simplified mechanism for swinging the cutter bar about its pivot. A still further object of this invention is to provide an improved mining machine having improved mechanism associated with the bar swinging mechanism for driving the wheels of the truck. These and other objects of my invention will, however, hereinafter more fully appear. In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,-

Fig. 1 is a side elevation of the improved mining apparatus, the cutter bar and machine body being shown in a plurality of positions as indicated by dotted lines.

Fig. 2 is a plan view of the apparatus shown in Fig. 1.

Fig. 3 is a transverse horizontal sectional view taken on line 3-3 of Fig. 1, parts being shown in elevation.

Fig. at is a vertical transverse sectional view taken on line'ii of Fig. 3.

F 5 is a central longitudinally extending horizontal sectional view taken on line 55 1 and illustrating the plural speed trar mission gearing.

FL, 6 is a developed sectional view taken on lnie 6-43 of Fig. 1 and illustrating the bar pivot and a portion of the bar swinging mechanism and cutter chain driving mechanism.

In this illustrative embodiment of my invention I have shown a truck frame 1 mounted on wheels 2 adapted to move relative to a mine trackway 3 in the usual manner. The truck frame 1 specifically comprises longitudinally extending parallel angle members 4:

Serial No. 140,578.

held in rigid spaced relation by means of transverse plates 5. The angle members 4 carry in a suitable manner the running gear for the truck wheels 2. As shown, a generally rectangular elongated machine frame or body 7 is slidable longitudinally relative to the truck frame 1 and is guided thereon by means of parallel interlocking guiding members 8 and 9 rigidly secured to the opposite sides of the machine frame and truck frame respectively, the members 9 being secured to the truck frame 1 by means of angle members 10 as clearly shown in Fig. 6. The machine frame 7 is supported by and slides directly on the transverse alates 5, the latter being rigidly secured to the angle members l at various longitudinally spaced points. However, it is obvious that rollers or other antifriction devices may be provided between the machine 6 and the truck frame. Further, the machine frame 7 is provided with an elongated plane cutter bar 11 movable in a vertical plane and about the outer edges of which an endless cutter bit carrying cutter chain 12 is adapted to be circulated, the cutter chain moving in a fixed orbit. The cutter chain is adapted to be driven by means of a usual drive sprocket 13 as clearly shown in Fig. 6. The cutter chain drive sprocket 13 is disposed at the front end of the machine frame 7 and is rotatable about a horizontal axis extending transversely of the machine frame. As shown, the elongated cutter bar 11 is pivoted, as at 14, on an axis coincident with the axis of the cutter chain sprocket 13 and has secured integral therewith cylindrical bearing members 15 disposed at opposite sides of the sprocket, the members 15 respectively engaging bearing surfaces 16 and 16*. The sprocket 13 is adapted to be driven from the driving motor, the horizontal longitudinally extending armature shaft of which is clearly shown in Fig. 5 as at 17, through transmission gearing clearly described in a pending application of one Morris P. Holmes, Ser. No. 619,839, filed Feb. 19, 1923. As the specific driving connections between the motor and the cutter chain drive sprocket do not enter into this invention, further detailed description of the same is deemed unnecessary other than to state that the sprocket 13 may be either connected or disconnected from the motor at will.

in speciti fally describing the improved echa'nism "for swinging the cutter bar ll a mat its pivot ll it will herein be observed 1 r 1e rear end of the armature shai t l? of he driving motor (see Fig. has suitably secured thereto a spur pinion S which is adapted. to drive the truck wheel driving mechanisnn and the improved lllQCilfiDiSlil for swinging the cutter bar about its pivot, to be hereinafter described, including plura speed transmission gearing and controlli clutches substantially si nilar to those scribed in the pending application tier. oll fifi mentioned above at a slow speed in one direction or at a fast speed in an oppodirection without reversing the motor.

the pinion l8 meshes with a spur gear 1? suitably journaled within bearings 90 c ried by the machine frame. The gear 19 l secured thereto and rotatable therewith z spur pinion 21 which meshes with a larger internal gear 22. The hub 23 of the gear is herein also journaled on a suitable bearing sleeve 2% on a sleeve clutch member keyed as at- 26 to a longitudinally disposed horizontal main driving or tansmission shaft 27 journaled at its opposite ones in suitable bearings 28 and 29 arried within the machine frame. Moreover it will be noted that the member carries a series of friction clutch discs 30 which are interleaved with a correspomjling series of clutch discs 31 carried by the sleeve of the internal gear. As shown, the sleeve on the internal gear is also provided with a plurality of radially located longitudinally extending slots receiving radial lingers 33 formed on an interlocking; member 3-.1: keyed to the hub of a pinion 35 freely rotatable on the shaft 2?. Interposcd between these fingers 33 are friction clutch operating; fingers 36 carried by a cylindrical plane clutch ope ating member 37 disposed coaxially with the hub o't' he member 3i. These fingers 36 extend longitudinally into contact with the adja 'ent end disc of the clutch 30. 31, As shown the rear end of the shaft 27 has secured thereto as by a key 2 3%. a spur pinion 39 which meshes with a spur gear 4C0 journaled within suitable. hearing carried by the machine frame 'ihe sou; gear 4.0 nas secure thereto and 7' therewith a spur pinion ail whl n l. with a larger internal gear 452 keyed as 43, to a longitudinally extending; horizontal shaft l disposed coaxially with the trz mission shaft 27. The shaft ll:

meshe i is "lfillllltllttl within spaced aliued roller bearings and +26 suitably carried by the machine frame. It will thus be noted that rotation of the armature shaft 17 will be transmitted to the pinion 18, b 22, friction clutch discs 30, 31 clutch member 25, shat T, pinion 39, gear 40, pinion l l. internal gear 42 and the shaft 44; to rotate the latter at a predetermined high or fast speed whenever the clutch controllingmember 3? is operated to connect the clutch 3t), 3}. it will here further be noted that this speed ma; be lowered at will by slipping the friction discs 30, 31 of the clutch.

Now referring specifically to the slow speed transmission it will be noted that when the clutch operating member 3? is in inoperative position and the clutch 3t), 31 is released, power will still be trmmnittcd through the interlocking member 3! to the pinion 35 which is freely rotatable on the shaft 2?. This pinion 35 in turn nu'shes with a p e: r 45 disposed coar-cially with the gear 21 and this gear has secured thereto and rotatable therewith a pinion i whi h meshes with a spur gear -19 disposed coaxial with and rotatable on the shaft 27.

gear 19, pinion 21 internal 1, 2;

ms gear l9 has secured thereto and rotatable therewith a spur pinion which meshesv with a spur gear 51 arranged coaxially with the gear -l-7 and this gear has secured thereto and rotatable therewith a spur pinion The spur pinion meshes with an internal gear substantially similar to the internal gear 22. The internal gear 53 also houses a friction clutch substantially similar to the clutch heretofore described in connection with the clutch discs 30, 31 and this clutch includes series of interleaved clutch c 54 and 55 certain of which are carried on clutch member 56 keyed as at 57 to the shatt 27 while others are carried by a sleeve formed on the internal gear 53. A clutch retaining member 58 is provided keyed as at 5?) to the hub of the spur pinion 39 and this clutch member in this instance has no ll ,erlockingr function and is only a disc retaining n1eniber. An axially movable cylindrical plane clutch operating member (it) surrounds the hub of the clutch member 58 and i provided with longitudinally extending lingers (d which are adapted to engage the arljm-eet end disc of the clutch discs 54'. The clutch operating}; members 37 and till may be operated to alternatively apply their respective clutches by means ol suit: hle :-:hipper mechanism which. i clearly described in the pending application mentioned abor and including an operating handle. 62 coirveniently located. at the rear end of the machine (see Figs. 1 and 2). As a result of 1 ti me-lauism above described although t clutch 30, 31, is disconnected rotation wi l coi'istantly be imparted through the pinion 35, gear 47, pinion 4S, gear 429, pinion 50. am r 51, pinion 52, internal gear 53, clutch (lists 54, 55, clutch member 56 pinion 39, near 40. pinion 41, internal gear 42 to the shaft 44 so that when the clutch 54 is connected the shaft it will be rotated at a slow speed in an opposite or reverse direction from the speed previously described. Here it will also be evident that by slipping the friction discs 5 1, 55 of the slow speed clutch this speed may be red u ced at will.

As clearly shown in Fig. 3 the shaft 414 is made hollow and has telescopically arranged therein a shaft 65, the shaft being held in non-rotative relation relative to the shaft 4 1 by means of a spline connection 66. It will be evident that the shaft is may be moved longitudinal y relative to the shaft 65 while the driving relation therebetween is r 1 1 constantly maintained. lhe rear end of tue shaft 65 is journaled on ball bearings 67 suitably carried within a housing or casing the angle members 1 of the truck frame 1.

he s he 65 has secured thereto at the rear end thereof as by a key 69 a bevel pinion 70 which constantly meshes with larger bevel gears 71 and 72 rotatably mounted on hearing sleeves 73 and 7 1 respectively surrounding and supported by a horizontal shaft 75 disposed transversely of the truck frame and jonrnaled at its opposite ends in ball bearings 76 suitably carried by the housing 68. The bevel gears 71, 72 rotate in opposite directions and constitute a reversing mechanism for the shaft 75. Carried upon each of the bevel gears 71 and 72 is a series of clutch discs 77 which is interleaved with a corresponding series of clutch discs 78 carried by each of the clutch housing members 79 keyed as at 80 to the shaft 75. Interposed between the gears 71, 72 and encircling the hubs thereof are axially movable clutch applying members 81 and 82 each having fingers projecting within the gears into engagement with the adjacent end disc of the series of clutch discs 77 and 78. As shown, a r ller equipped shipper yoke 83 is provided, the rollers of which engage the adjacent plane surfaces of the clutch applying members 81, 82 and this shipper yoke is keyed to vertically disposed shaft 841 suitably rotatably mounted within the housing 68. The shaft 8 1 has secured thereto at its upper end an operating lever 85 Figs. 1 and 2). it will thus no evident that when the operator suitably swings the lever 85 about its pivot the shipper yoke is consequently swung and the desired. clutch 77, 78 is applied thereonnecting one or the other of the bevel s 71, 72 in operative driving relation the shaft 75, rotating the latter selective ly in opposite directions. The shaft 75 may also be rotated at either a fast or at a slow speed under control of the clutches 30., 31 and 54, 55 described above under the control of the operating member 62.

In this instance, journaled on the shaft 75 and connectible thereto is a worm 88. The mechanism for connecting the worm 86 to the rigidly secured in a suitable manner to,

shaft 75 will be later described. The worm 86 meshes with a worm gear 87 (see Fig. 4) keyed as at 88 to a horizontal shaft 89 disposed below the shaft 75 and extending longitudinally of the machine at one side thereof. The forward end of the shaft 89 is threaded as at 90, and is threadedly connected, as at '91, to a suitable nut member 92 secured as by screws 93 to the side of the machine frame 7 at the rear end thereof. As shown in Figs. 1 and 6 the cutter bar 11 has secured thereto as by rivets 94: an angle member 95, the latter in turn being secured as by bolts 96 to a member 97. The member 97 is rotatably mounted, as at 98, on a bearing sleeve 99 encircling and supported by a cylindrical bearing portion 100 preferably formed integral with the machine frame 7 and disposed coaxially with the axis of bar swing. As illustrated, the member 97 has preferably formed integral therewith a depending arm 101 having formed therein an elongated slot 102 extending radially of the bar pivot. Mounted in the slot 102 is a block 103 pivotally supported, as at 104, on a horizontal pin 105 disposed transversely of the machine and threadedly connected, as at 106, within a block 107 rigidly secured to one of the angle members 4 of the truck frame. From the f0regoing description it will be evident that when the shaft 65 is connected in driving relation with the motor and when the shaft 75 is connected to one of the bevel gears 71, 72 the screw 90 may be rotated thereby effecting axial movement of the nut 92 relative to the screw and consequently moving the mining machine 6 in its guides longitudinally rela-. tive to the truck frame. As the machine frame 7 moves longitudinally relative to the truck frame the relatively stationary block 103 acts as a fulcrum or abutment for the arm 101 and consequently the cutter bar, to which the arm 101 is ri idly secured, is swung about its pivot 14, the elongated slot 102 permitting swinging movement of the arm 101 relative to the block 103 on the truck frame. By connecting the shaft 75 to the one or the other of the bevel gears 71 and 72 and suitably controlling the clutches 30, 31 and 54, 55 the screw 90 may be rotated in either direction and at either a fast or a slow speed in either direction and consequently the cutter bar may be swung about its pivot as desired.

In specifically describing the improved means for driving the truck wheels from the motor carried by the machine frame 7 it will be observed that secured to the end of the shaft 75 opposite from the worm 86 as by a key 109 is a spur gear 110. Arranged coaXially with the gear 110 is a spur gear 111 preferably formed integral with a shaft 112 disposed coaxially with the shaft 75 and journaled in spaced alined ball bearings 113 suitably carried by the housing 68. The gear 111 is connectible in driving relation with the gear 110 by means of an axially movable 1nternal sh ppcr gear 114:. A}; learly shown in 3 the shaft 112 ms secured thereto at its outer end a chain sprocket 115 which is connected by means of an endless drive chain 116 to a sprocket 117 suitably rigidly secured to the rail truck axle. As shown, in 1 and 2 the front and rear truck axles are connected together by neans of a chain and sprocl-Iet connection 117. Again referring to Fig. 3 it will be observcrjl that the worm 86 has preferably formed integral therevith at the outer end thereof a spur gear 118 which is connectihle by means of an axially movable internal shipper gear 119 to a spur gear 120 liteved, a. at 121, to the shaft The mechanism for alternatively connecting the 111 and 118 in driving relation with shaft rill now he dcscribet Cooperating with the peripheral grooves in the internal shipper gears 11 1- and 119 respectively are shipper yokes 122 and 123 secured as by pins 12-1 at the opposite ends of an actuating rod or snaft 125 slidably mounted within bores 126 formed within lateral lugs 127, the latter being formed integral with the housing 68. As shown, longitudinally spaced stop pins 128 are carried by the rod 125 and are adapted to alternatively engage the adjacent inner sides of the lugs 127, thereby preventing excessive movement of the shipper gears in either direction. The rod 125 is vertically slotted intermediate its ends as at 129 and cooperating with this slot is a shipper lever 130 pivoted on the housing 68. it will thus be evident that when the lever 130 is grasped by the operator and swung about its pivot to effect ax'al n'lovomcnt of the rod in one direction, the gears 110, 111 are connected by the shipper gear 11%1 while the gears 118. are disconnected by the snip vcr gear 119. YVhen the shipper rod 125 is shifted ax'ally in the opposite direction the gears 110. 111 a released and the gears 118, 120 are connected. it is obvious that the gears 111 and 118 may only be al.- tcrnatively driven.

Suitably secured to the rca r truck axle is a frictional braking device 135 (see Fig. 2) and this braking device is adapted to he operatn {119 operation of my in'iproved niinin la tor moving rapidly 0011 the mine the clutch 77'. 78 1s applied connecting the bevel gear 71 in driving :elation with the shaft apparatus. it will he noted that when the 75 and the truck drive gears 110, 111 are connocted by the clutch shipper gear 114, it bein understood that the motor is running and the fast speed clutch 30. 31 is applied and con sequently the shaft is revolving at a high speed. lVhen it is desired to drive the min ing apparatus rearwardly relative to the trackway a a high speed the bevel gear 71 is released from the shaft and the bevel gear 72 is connected to the shaft 7 5 by means of its controlling clutch 77, 78. ,Vhen the machine is disposed adjacent the working face the operator disconnects the bevel gear 71 from the shaft 75 and shifts the rod 125 axially, disconnecting the truck drive gears 110, 111 and connecting the bar swing gears 118, 120 in driving relation with the shaft 75 by means of the shipper gear 119. The clutch 77, 78 then applied, connecting the bevel gear 71 to the shaft 75, it being understood that tie shaft 65 is still rotating at a high peed, and the screw is rotated at a fast speed and the machine frame 7 is moved r-i-zuwardly longitudinally relative to the ti ark frame, the reaction of the arm 101 against the relatively stationary block 11)?) carried by the truck f'ame effecting fast swinging movement of the cutter ha" from the full line position shown in Fig. 1 upward y about its pivot to the upper dotted line :tion in that figure, thereafter the bevel gear 71 being released from the shaft 75 and rotation of the screw 90 is of course ll ontinued. The operator then suitably connects the cutter chain drive sprocket 13 to the motor and the cutter chain 12 is rapidly circulated about the outer edges of the cutter bar 11 in a usual manner. The rod 125 then shifted axially, disconnecting the bar swing gears 118, 120 and connecting the truck drive gears 110, 111. The fast speed clutch 3!). 31 is then released and the slow speed clutch 5d, is applied and the shaft (35 is consequently 'otated in an opposite direction at a slow speed. The clutch 77, 78 is then applied, connecting the bevel gear 72 to the shaft 75 and the cutter bar is then sumped into the coal, the apparatus moving bodily along the trackway at that time. After the sumping cut is completed the bevel gear 72 and the truck drive gear 111 are disconne ted from the shaft 75 and the bevel gear 71 and the bar swing gear 118 connected to the shaft 75 and the screw 90 is rotated at a. slow speed in the opposite direction, con 11161111.} moving the machine frame 7 wardly r lativc to the trucl: frame and rovinging the cutter bar at a slow or cutting speed downwardly from its uuper dotted line positi' n to its lower dotted line position shown in Fig. 1. During this swinging cut the truck wheels are held against rotation by means of the frictional braking device 135. After the swinging cut is completed, the braking device is released, the bevel gear 71. is disliill connected from the shaft 75, and the rod 125 is again slid axially, disconnecting the bar swing gears 118, 120 and again connecting the truck drivegears 110, 111. The bevel gear 71 is then again connected to the shaft 75 and the cutter bar is then retracted from the face at a cutting speed, the apparatus moving bodily rearwardly along the trackway at that time. After the withdrawal out is completed the cutter chain is disconnected from the motor, the bevel gear 71 is. disconnected from the shaft 7 5, and the operator then shifts the rod 125 axially, disconnecting the truck drive gears 110, 111 and connecting the bar swing gears 118, 120. The slow speed clutch 54, is then released and the fast speed clutch 30, 31 is again applied and the shaft is consequently rotated at a high speed. The bevel gear 71 is then connected to the shaft and the screw 90 is then rorated at a high speed moving the machine frame rearwardly relative to the truck frame and the bar is consequently swung upwardly about its pivot at a fast speed to the full line position shown in Fig. 1. The bar swing gears 118, 120 are then disconnected and the truck drive gears 110, 111 are again connected, the gear 71 disconnected and the gear 72 connected to shaft 75, and the apparatus is driven bodily rearwardly from the face along the mine trackway at a high speed. These and other operations and advantages of my improved mining apparatus will be clearly apparent to those skilled in this art.

lVhile I have in this application specifically illustrated and described one form which my 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 modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

W hat I claim as new and desire to secure by Letters Patent is 1. In a mining apparatus, a wheeled truck frame, a machine body slidably guided on said frame and having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means including a pivotal connection between said cutter bar and said truck frame and lying wholly outside of said cutter chain orbit for swinging said bar about its pivot including mechanism for moving the machine body longitudinally relative to said truck frame to effect bar swing.

2. In a mining apparatus, a wheeled truck frame, a machine body slidably guided on said frame and having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means for swinging said bar about its pivot including mechanism for moving the machine body longitudinally relative to said truck frame to effect bar swing andincluding connections between said cutter bar and said truck frame and disposed wholly outside of said cutter chain orbit.

3. In a mining apparatus, a wheeled truck frame, a machine body slidably guided thereon and having mounted thereon a pivoted cutter bar, and means for swinging said cutter bar about its pivot including mechanism carried by said machine body and truck, and including a telescopic driving connection whereby the machine body may be moved longitudinally relative to the truck frame to effect bar swing while the driving relation therebetween is maintained.

at. In a mining apparatus, wheeled truck frame, a machine body slidably guided thereon and having mounted thereon a pivoted cutter bar carrying an orbitall movable cutter chain, and means including a pivotal connection between said cutter bar and said truck and lying wholly outside the cutter chain orbit for swinging said cutter bar about its pivot and mechanism for moving said machine body longitudinally relative to said truck frame in either direction to effect swinging movement of said cutter bar to positions wherein the cutting portion of said bar lies at opposite sides of a longitudinal plane in cluding said cutter bar pivot.

5. In a mining apparatus, a wheeled truck frame, a machine body slidably guided thereon and having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain and a driving motor in said body, and means driven by said motor including a pivotal connection between said bar and truck frame and lying wholly outside of said cutter chain orbit for swinging said cutter bar about its pivot including mechanism for moving said machine body relative to said truck frame to effect bar swing.

6. In a mining apparatus, a wheeled truck frame, a machine body slidably guided thereon and having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, a driving motor in said body, and means driven by said motor including a pivotal connection between said cutter bar and said truck and lying wholly outside of said cutter chain orbit for swinging said cutter bar about its pivot mechanism for mov ing said machine body relative to said truck frame in either direction to effect swinging movement of said cutter bar to positions wherein the cutting portion of said bar lies at opposite sides of a longitudinal plane including said cutter bar pivot.

7 In a mining apparatus, a wheeled truck frame having guides thereon extending longitudinally thereof, a machine body supported on said truck frame and having guides thereon cooperating with said guides, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means including a pivotal connection between said bar and said truck frame and lying wholly outside of said cutter chain orbit for swinging said cutter bar about its pivot including mechanism for moving said machine body in said guides longitudinally of said truck frame to efiectbar ting.

8. In a mining apparatus, a wheeled truck frame having guides thereon extending longitudinally thereof, a machine body supported on said trucl: frame and having guides thereon cooperating with said guides, said mac iine body having mounted thereon a. pivoted cutter bar carrying an orbitally movable cutter chain, and means for swinging said cutter bar about its pivot including mechanism for moving said machine body in said guides longitudinally of said truck frame toeffect b: .r swing, and connections between said cutter bar and said truclrframe and lying wholly outside of said cutter chain orbit.

9. In a mining apparatus, a wheeled truck frame, a machine body slidably supported thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means for swinging raid cutter bar about its pivot including mechanism for moving said machine body longitudinally relative to said truck frame, and connections between said cutter bar and said truck frame and lying wholly outside of said cutter chain orbit. I 10. In a mining apparatus, a wheeled truck frame, a. machine body supported thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar, and means for swinging said cutter bar about its pivot including mechanism for moving said machine body longitudinally relative to said truck frame, and connections between said cutter bar and said ruck frame including a slotted arm secured to said bar and pivot block carried by said truck and cooperating with the slot in said arm.

11. In a. mining apparatus, a wheeled truck frame, a machine body slidably supported thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain and a driving motor in said body, and means driven by said motor for swinging said cutter bar about its pivot including mechanism for moving said machine body longitudinally relative to said truck frame, and connections between said cutter bar and said truck frame and lying wholly outside the orbit of said cutter chain.

12. In a mining apparatus, a wheeled truck frame, a machinebody slidably mounted thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, and means for swinging said cutter bar about its pivot to positions wherein the cutting portion thereof lies at opposite sides of a longitudinal plane including the cutter bar pivot and including connections between said cutter bar and said truck frame and lying wholly outside of said cutter chain orbit.

13. In a mining apparatus, a wheeled truck frame, a machine body mounted thereon and movable longitudinally relative thereto, said machine body having mounted thereon a pivoted cutter bar, and means for swinging said cutter bar about its pivot including connections between said cutter bar and said truck frame, said connections including a radial arm secured to said cutter bar and disposed angularly relative thereto, and an abutment on said truck frame slidably engaging said drln.

14. In a mining apparatus, a wheeled truck frame, a machine body slidably guided thereon and having mounted thereon a pivoted cutter bar swingable in a vertical. plane and a driving motor in said body, and means driven by said motor including a reversing mechanism carried by said truck frame and relative to which said body is movable for swinging said cutter bar about its pivot in opposite directions and mechanism. for moving said machine body longitudinally relative to said truck frame to effect swinging movement of said cutter bar to positions wherein the cutting portion thereof lies at opposite sides of a horizontal plane including the cutter bar pivot.

15. In a mining apparatus, a wheeled truck frame, a machine body slidably guided thereon and having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain and a driving motor in said body, and means driven by said motor for swinging said cutter bar about its pivot in opposite directions including mechanism for moving said machine body longitudinally relative to said truck frame to effect swinging movement of said cutter bar to positions above and below a horizontal plane including the cutter bar pivot, and connections between said cutter bar and said truck frame and lying wholly outside of said cutter chain orbit.

16. In a mining apparatus, a wheeled truck frame, a machine body slidably guided there on and having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, a connection between said cutter bar and said truck and lying wholly outside of said cutter chain orbit, and means for swinging said cutter bar about its pivot in opposite directions at different speeds including mechanism for moving said machine body longitudinally relative to said truck frame in either direction to effect bar swing.

17. In a. mining apparatus, a wheeled truck frame, a machine body supported thereon and IOU movable longitudinally rectilinearly relative thereto, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, a connection between said cutter bar and said truck and lying wholly outside of said cutter chain orbit, and means for swinging said cutter bar about its pivot in opposite directions at diffe ent speeds including mechanism for moving said machine body relative to said truck frame in either direction to effect bar swing.

18. In a mining apparatus, a wheeled truck frame, a machine body slidably guided thereon, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, a connection between said cutt r bar and said truck and lying wholly outside of said cutter chain orbit, and motor driven fast and slow speed transmission mechanism in said body, and means for swinging said cutter bar about its pivot including mechanism driven by said transmission mechanism for moving said machine body longitudinally relative to said truck frame to effect bar swing.

19. In a mining apparatus, a wheeled truck frame having guideways, a machine body thereon slidably guided in said guideways, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, a connection between said cutter bar and said truck and lying Wholly outside of said cutter chain orbit, and motor driven fast and slow speed transmis sion mechanism in said body, and means for swinging said bar about its pivot including mechanism driven by said transmission mechanism for moving said machine body longitudinally in said guideways relative to said truck frame to effect swinging movement of said cutter bar to positions at opposite sides of a longitudinal plane including said cutter bar pivot.

20. In a mining apparatus, a wheeled truck frame having guideways, a machine body thereon slidably guided in said guideways, said machine body having mounted thereon a pivoted cutter bar carr ing an orbitally movable cutter chain and motor driven fast and slow speed transmission mechanism in said body, and means for swin ing said bar about its pivot including mechanism driven by said transmission mechanism for moving said machine body longitudinally in said guideways relative to said truck frame to effect swinging movement of said cutter bar to positions at opposite sides of a longitudinal plane including said cutter bar pivot, and connections betweensaid cutter bar and saic truck frame and lying wholly outside of said cutter chain orbit. Y

21. In a mining apparatus, a wheeled truck frame having guideways thereon, a machine body supported on said truck frame and slidably guided in said guideways, said machine body having mounted thereon a pivoted cntter bar carrying an orbitally movable cutter chain, a connection between said cutter bar and said truck and lying wholly outside of said cutter chain orbit, and means for swinging said cutter bar about its pivot including mechanism for moving said machine body in said guideways relative to said truck frame at different speeds to efieot swinging movement of said cutter bar to positions at opposite sides of a longitudinal plane including said cutter bar pivot.

22. In a mining apparatus, a wheeled truck frame having guideways thereon, a machine body supported on said truck frame and slidably guided in said guideways, said machine body having mounted thereon a pivoted cutter bar carrying an orbitally movable cutter chain, a connection between said cutter bar and said truck and lying wholly outside of said cutter chain orbit, and means for swinging said cutter bar about its pivot including mechanism for moving said machine body in said gnideways relative to said truck frame at different speeds in opposite directions to effect swinging movement of said cutter bar in opposite directions to positions at opposite sides of a longitudinal plane including said cutter bar pivot.

23. In a mining apparatus, a wheeled truck frame having guideways thereon, a machine body slidably guided in said guideways, said machine body having mounted thereon a pivoted cutter bar and a motor in said body, means for swinging said cutter bar about its pivot including mechanism for moving said machine body in said guideways longitudinally relative to said truck frame to ef fect bar swing, and mechanism driven by said motor for driving the wheels of said truck to propel the apnaratus bodily along the mine trackway at a cutting speed to effect sumping and withdrawal movements of said cutter bar.

24. Inaminingapparatus,a vheeledtruch frame having guideways thereon, a machine body slidably guided in said guideways, said machine body having mounted thereon a pivoted cutter bar and motor in said body, means for swinging said cutter bar about its pivot including mechanism for moving said machine body in said guideways longitudinally relative to d trucl: frame to effect bar swing, and mechanism driven by said mot r for driving the wheels of said truck at different speeds to propel the apparatus bodily along the mine traclrway, said wheel driving mechanism including means for driving the truck wheels at a cutting speed to eife sumping and withdrawal movements of said cutter bar.

25. In a mining apparatus, a wiieeled cl: frame having guideways thereon, a ma QilllQ body slida-bly guided in guideways, said machine body having mounted thereon a piv oted cutter bar am means swii t .;71 pivot including; mm f said macl'zinc uinc and mechv v nallv relative to lriveu l motor for (lriving the 1 opposite dire ns to bodily along; the min )aratus wheeled truck 21p v 1. "it UTAH-,3 LllQ; D11 ll llliiUllilG ded in X i il l v rel for driv 1 swinging means for dri the wheels of said bar sv nouns and said l: ing means ily a irnativ' opcruble.

28. In a miningmpparatus a vhceled trucl-z frame, a machine bod slidably supported thereon a id movable longitudinally relative thereto, said machine body having mounted thereon a pivo d c itter bar and a driving 1 motor, means driven l 1v said motor for swing 121;; said cutter bar its pivot includi niechaiimn ror moving; said al' out machine bony longg itiidinally relative to sail truck frame, and me: is driven by s: id mot( the wheels of said truck, said bar swii means and said truck driving; means 1 only alternatively connectible to said i. 29. in a mining appari-il is, a wheel d frame, a nnu'hine body supported thereon Mill movable longitudinally relative thereto said nmchine body having: mounted thereon a pivoted cutter bar, and means for swingin 'd cutter bar about its including in nism for moving i said machine body roh. to said truck frame and i pivoted co inec between said bar and said frame at a point in advance of the front trir-k axle.

30. in a mining; "ppairatns a wheeled truck frame l avingr gruideways body slidrbly guided uid-w vs and havingmourtcd L l ere 1 l -11" mechanism for movin i a l i in said iideways lougiiut inallv ielative to and trucl; frame to effect swinging movement of said cutter bar, and means for driving the wheels of said truck maid bar sv. raging inc ins and said trucl; wheel driving moors being only alternatively operable.

31. In a mining anparz ins, :1 wheeled ti:

no, a mochinc bo l movable c said machine a pivoted cutt motor in said body, 1 motor for moving: sai l tudinally relative to s d hevin mouniud swinging of said ruttc' r about its pi i: and means driven by suid motor for d s 1 the wheels of said truck, s:ii( means and said truck driving only alicrnativclv conncctiblc to s...

:1. Lil d J!1ll!]J-;Lli)l)li1a A; ul v (It Kiln frimm a machine body supported th movable long tudinally rclutiv li'lilCiLdQ bodv having mounted otcd cuttrr bar, and men.

v tie pivotal axis of said r cr bar.

33. In a mining llfl)[lliliil15,it whcclcd truck fran'ie, a n1 achiue body supported thereon 11d in vable longitudinally relative thereto, said ma chine body having; mounted thereon a pivoted cutter bar swingable in a vertical plane and means for moving said machine body relative to said truck frame to effect swinging movement of said cutter bar upwardly and downwardly to positions wherein the cutting; portion of said bar lies above and below a horizontal plane including said cutter bar pi *ot and including a pivoted connection be- 11 said bar and said frame at a point in advance if the front truck axle and located a substantial distance below the pivotal axis of said cutter bar.

3%. in a mining apparatus, a portable base frame, a sliding frame mounted thereon, cul ting inei'rlianisn'i including a swingable cutter bar carrying an orbitall v movable cutter cl ain and pivotally mounted on said sliding: frame, a pivotal connection between ,i cutter bar and said base frame and lyi wholly outside of the orbit of said curtc chain, and means for moving said s-uiding frame relative to said base frame for swung;- ing said cutter bar about its pivot to etl'cct a swinging cut.

In a mining appa atus, a port: ble base frame, a. sliding frame mounted thereon, cutting mechanism including a swingable cutter bar carrying an orbitally movable cutter chain, a pivotal connection between said cutter bar and said base f inns and lying}; wholly outside the orbit of said cutter chain, a connection between said cutter bar and said sliding frame, and means for moving said sliding frame relative to said base frame to swing said bar relative to said base frame to effect a swinging cut.

36. In a mining apparatus, a portable base frame, a sliding frame mounted thereon, cutting mechanism including a swingable cutter bar carrying an orbitally movable cutter chain, said sliding frame being pivotally connected to said cutter bar about an axis lying within the orbit of said cutter chain, a pivotal connection between said cutter bar and said base frame and lying wholly outside the orbit of said cutter chain, and means for moving said sliding frame relative to said base frame to swing said bar relative to said base frame to effect a swinging cut.

37. In a mining apparatus, a portable base frame, a sliding frame thereon carrying a motor, cutting mechanism including a swingable cutter bar carrying an orbitally movable cutter chain, a pivotal connection between. said cutter bar and said base frame and lying wholly outside the orbit of said chain, and mechanism driven by said motor for moving said sliding frame relative to said base frame to swing said cutter bar about its pivot to effect a swinging cut.

38. In a mining apparatus, a portable base frame, a sliding frame thereon, cutting mechanism including a swingable cutter bar can rying an orbitally movable cutter chain and pivotally connected to said base frame about an axis lying wholly outside the orbit of said cutter chain, a connection between said sliding frame and said cutter bar, and means for moving said sliding frame relative to said base frame to swing said bar relative to said frames to effect a swinging cut.

39. In a mining apparatus, a portable base frame, a sliding frame thereon carrying a motor, cutting mechanism including a swingable cutter bar carrying an orbitally movable cutter chain and pivotally connected to said base frame about an axis lying wholly outside the orbit of said cutter chain, a connection between said sliding frame and said cutter bar, and means driven by said motor for moving said sliding frame relative to said base frame to swing said bar relative to said frames to effect a swinging cut.

40. In a mining apparatus, a portable base frame, cutting mechanism thereon including a swingable cutter bar carrying an orbitally movable cutter chain and pivotally connected to said base frame about an axis lying wholly outside the orbit of said cutter chain, and means including a frame slidably mounted on said base frame and pivotally connected to said cutter bar for swinging the latter relative to said base frame to effect a swinging out.

41. I11 a mining apparatus, a portable base frame, a machine frame mounted thereon and movable relative thereto, cutting mechanism including a swingable cutter bar carrying an orbitally movable cutter chain and pivotally mounted on said machine frame, an angularly disposed arm secured to said cutter bar and

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