US1635780A - Mining machine - Google Patents

Description

July 12 1927' F. CARTLIDGE MINING MACHINE Filed May l, 1918 7 SheetS-Shec 1 w )uw www @uw www NH,

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July 12,1927' F.- CARTLIDGE y MINING MACHINEl -Filed May 1, 1918 '7l sheets-sheet 5 July- 12 1927' F. CLARTLIDGE MINING lvmCHINEv Filed May l, 1918 '7 Sheets-Sheet 6 `July 12, 1927.

. 1,635,780 F. CARTLIDGE, y

MINING MACHINE- Filed May 1, 1918 7 sheets-Sheet 7 11W/e zt 7 Enid h1 Patented l.Billy l2, 1927.'.

' UNITED STATES PATENT OFFICE.

i FRANK CARTLIDGE, or CLAREMoNT, lNEW MAMPSHIRE, ASSIeNonv To SULLIVAN MA- CHINERY COMPANY, A CORPORATION oF MASSACHUSETTS.

MINING MACHINE.

` Application led Hay l1, 1918. Serial No. 231,915.

cation ofv certain of its features` comprises a truck mounted, self-propelled machine adapted to cut a lierf of considerable depthl in substantially any deslred vertlcal plane, and. consists in certain novel constructions,l

arrangements, and combinations of parts constituting'the cutting appliances, the means for supporting, guiding, and transporting said cutting appliances, the mechanisms for actuating and controlling the same, and certain auxiliary parts associated therewith.

The foregoing and other more particular Objectis ofthe invention, together with means whereby the same may be carried into effect,- will lbestfbe understood from the following.

description otone form' or embodiment there of illustrated in theaccompanying draw- ,in`gs.

Insaid drawings,-

Fig.v 1 is a side elevation ofthe complete machine.

Fig. 2 is a plan view thereof.

Fig is a longitudinal section, taken substantially on the line 3 3, Fig. 2, .of the truck and turret with the cutting mechanism removed.

Fig. 4 yis a transverse section on the line 4-4, Fig. 3. s l

Fig. 5 is a planview of the turret, a portion of the truck, and a portion ofthe motor mechanism for moving the cutting mechamsm, the latter bemgremoved and a part of the piping being shown diagrammatically to facilitatax illustration. i

Fig. is an enlarged plan view, partly in horizontal section, of the hydraulic motor mechanism Jf'or moving the cutting mechanism toward and from the work and for swinging the cutter bar, a part of the piping F ig. 8 is a transverse vertical section substantially on the line 8-8, Fig. 7.

Fig. 9 a longitudinalv Section taken in the longitudinal vertical plane of the line .9-'9 of Fig. 2, said section not .being ex tended. through the mining machine motor proper.

Fig. 10 the longitudinal vertical plane of the line 1'0-10 ot' Fig. 2, said section not being extended through the mining' machine motor proper.

' Fig. l1 is a fragmentary transverse vertical sectiontaken substantially on Vthe line 11-11, Fig. 9. f

Fig. 12 is an endelevation, partlyvin section on the line 1'2-12, Fig. 10.

Fig, 13- is a vertical transverse section, substantially on the line 13-13,`Fig. 2.

Fig. 14 is a detail elevation taken on the line 14-14, Fig. 2 Vof the latch mechanism for securing the cutting mechanism in position on the turret..

Fig. 15 is a view similar to Fig. 14, showing the parts in a slightly different osition.

Fig. 16 isa detail plan view o one oi the latches for locking the turret against angular movement on the truck.

Fig. 16a is a transverse sectional view thereof taken- Substantially on the line y 16a-16a of Fig. 16.

Figs. 17 to 22, inclusive, are diagrammatic views in elevation, and Fig. 23 a diagram matic View in plan, illustrating the operation of the machine in entry cutting.

Figs. V24 and 25 are diagrammatic Views in plan, illustrating the operation. of the machine in cutting kerfs in other vertical planes.

Referring to Figs. 1 and 2, the machine comprises a truck mounted on wheels 31 adapted to run on tracks 32 on the mine bottom, said Wheels being mounted on axles 33 carrying sprocket wheels 34 connected by asprocket chain 35, said axles 33,' as shown in'y Fig. 3, being preferably journaled "in brackets 36 adjustable longitudinally of the truck frame by means of abutment Screws 37, in order to take up undue slack in the chain 35. The rearmost axle 33, as shown in Fig. 3, is preferably provided with a brake drum 38 with which cooperates a band brake 39 o erated through a screw shaft 40 by `a suita le crank 41. Said last named axle 33, as shown in Fig. 1, is also provided with a sprocket 42 connected by a chain 43, passing over an idler sprocket 44, with a sprocket 45 forming a part of the truck propellin mechanism hereinafter more fully descri ed.

Mounted on the truck for angular movement about a vertical axis, is a turret comprising a turntable 46 pivoted to the truck platform by means of a suitable bushing 47 (see Figs. 3 and 4) passing through aligned openinfgs in said platform and turntable and secure in place in said openings by plates 48 connected by bolts 49 passing through said bushing. The turntable 46 is supported for rotary movement about the axis of the bushing 47 by means of rollers 50 journaled on studs 51 carried by brackets 52 bolted or otherwise secured to the under face of the truck platform, said rollers projecting through suitable vopenings in said platform.

Said turret is provided with a pair of parallel ways 53 arranged substantially in a horizontal plane, in which Ways the cutting mechanism is slidably mounted for longitudinal movement. Said cutting mechanism comprises a frame or body 54 (a bottom portion of which, as herein shown, is formed hollow to constitute a liquid tank or reservoir 54* for purposes hereinafter explained), an electric or other motor 55 (see dotted lines, Fig. 9) in a suitable casinfr 56 (Figs. 1 and 2), said motor having suitable controlling devices 57, and a cutter bar 58 carrying a cutter chain 59 rovided with cutter bits 60 and actuated, t rough connections hereinafter described, by the motor 55, said cutter bar being pivoted to swing about a horizontal axis extending transversely of the machine, and, when so swung, moving in a substantially vertical plane between the ways 53. f

Each of the ways 53 carries at its outer side a jack comprising a, central or intermediate member 61 pivoted at 62 to the corresponding way, and oppositely extending lower and upper end members 63 and 64 independently adjustable with respect to the intermediate member 61 by means of nuts 65 carried by the inner ends of said members 68 and 64 and engaging threaded end portions o the intermediate member 61, which threaded portions are.received within the members 63 and 64 which are made hollow for this purpose. By this construction, it will be seen that each ofthe jacks is rendered independently extensible in either or both directions from its pivot.I When in usexthe jacks are turned about their pivots 62 into more or less upright positions to cause the members 63 and 64 to engage, at their ends, the mine bottom and roof, respectively, as

hereinafter more fully explained. At other i times, as when the machine is being transported from place to place, saidl jacks are turned into the approximately horizontal position shown in Figs. 1 and 2, the members 64 thereof being'supported by brackets 66 carried by one o the cross members 67 which connect, space, and brace the ways 53, said members being depressed at their central portions, as shown most clearly at 68 in Fig. 1, to permit the cutter bar 58 to be swung downwardly to `the maximum extent about its pivot. l

iVhen the apparatus is being transported from place to place, and in the operation of entry cutting, the turret occupies a position in which the ways 53 extend substantially parallel to the length of the truck body 30,

as shown in Figs. 1 to 4. For the purpose of so positioning the turret, and for locking the same in this position, there is provided a pair of bolts 69 (Figs. 2 and 16) slidably mounted in brackets 7 0 secured to the truck platform and engaging blocks 71 which are secured tothe under side of a cross bar 72 connecting the rear ends of the ways 53, as by cap screws 74 passing through slots 75 in said'blocks, whereby said blocks are rendered slightly adjustable in order to vary the angular position of the turret, as may be required. For the purpose of retaining the bolts 69 in position to engage the blocks 71, there are provided swinging latches 76 each pivoted at one end toa bracket and engaging at its central portion the end of the corresponding bolt 69, and at its opposite end a fixed lug 77. It will be evident that by projecting the proper one of the bolts and then swinging the turret to transport position, the latter will be stopped when proper position is reached.

When the machine is idle, or when the same is being transported from place to place, the cutting mechanism occupies its rearmost position in the Ways 53, as shown in Figs. 1 and 2. To retain said machanism in this position, there is provided a verticallyswinging gravity latch 78 (see Figs. 2, 14, and 15) pivoted at 79 to one of the ways 53 and limited in its downward swinging movement by a lug or stop 80 projecting from the side of said way. Said latch is formed with a hook portion 81 adapted to engage a lug or stud 82 projecting from the side of the frame or body 54, thereby locking the cutting mechanism against forward movement, as shown in full lines in Fig. 14. In order to release the cutting mechanism, to permit the same to move forwardly in the ways 53, the latch 78 is raised by hand into the position shown in dotted lines in Fig. 14, said latch, when in this position, resting against a second lug or projection 83 on the body 54. As said causes the latch 78 to be returned to its oper- `ative posi-tion,.as shown in Fig. 15, the lug 82 having, however, at this time passed beyond the hook 81. The forward end of the latch 78 is beveled, as at 84, whereby, as the body 54 i's returned to its rearmost position, the lug 82 will, by engagement with said beveled end, raise said latch and, after passing beneath the hook 81, :permit said latch to return to ynormal position, as shown in Fig. 14. l

At its rear end, the motor casing 56 1s provided with a socket 85 (see Figs. 1, 2, and 9) within which is a clutch member 86 carried by the end of a. rearwardly extending portion of 55 ig. 9). adapted, when the turret is in its normal position above referred to, and the cutting mechanism is in its rearmost position, to be engaged by a cooperating4 clutch member 88 (see Ialso Figs. 3 and 4) a universal joint 89 with a shortshaft 90 slidably and rotatably mounted in bearings in an upright gear casing 92 supported by.

the truck`k body adjacent the rear end thereof, said shaft being preferablyy rovided at its outer end with a suitable han le herein shown as awheel 91. The shaft 90 constitutes a primary'driving shaft. By moving the shaft 90 longitudinally by means of the hand wheel 91, the clutch member 88 may be engaged with or disengaged from the clutch member 86, and when disengaged may be withdrawn from the socket 85, thereby permitting t-he turret to turn, the

socket 85 protecting said clutch member86 against accidentalv injury when said' turret is s'o turned. l.

The shaft 90 has a splined connection with a .pinion 93 (Figs. 3 and 13) which meshes with a gear 94journaled onv a stud l95 supported by* the gear casing 92, lsaid gear 94 having a. pinion portion 96 which mesheswith a spur gear 97 on-the hub of a beveled gear 98 rotatably mounted on stud shaft 99 secured, as by a bolt 100, in the gear casing 92. The i gear 98 meshes with two oppositely disposed beveled gears 101 loosely mounted on-a shaft 102 suitably journaled in the casing 92 and' carrying at its end the truck ropelling sprocket 45 (see also Fig. 1). o'ald gears 101 may be alternatively clutched to the rshaft 102, to cause thetruck to be propelled in eithenudirection, by means ofl friction clutches,"fdesig nated as a whole'by the numeral 103(Fig.

i 13), each comprising a shell 104 having a hub upon which the corresponding gear 101 isv rotatably mounted, a v.series of friction disks 105, alternate disks vbeing in notched engagement with the shell 104, and the remaining disks being in notched engagement with aV sleeve 106 keyed or otherwise secured the' shaft 87 of the'motor The clutch member 86 `1S A shell 104 for rotation therewith.

intermediate the rings 110 is an annulus 111 connected by to thel shaft 102, the outermost disk engaging an abutment ring A107 in threaded, and consequently adjustable, engagement' I,with the sleeve 106.' The innermost disk 10,5 of each clutch 103 is engaged by a'clutch bontrollin ring 108 wlnch, when mov'ed`-, toward t 1e abutment ring 107, will causei the disks 105 to be pressed into engagement with one another, thereby rendering the clultch operative, as will be familiar to those skilled in the art. bach of the rings 108 is connected,-by` means of one or\more pins *or rods 109 correspon a ring 110 (passing through openings inl the ing shell. 104 and gear 101, w1tl1 loosely mounted on the hub of said gear 10.1,.said pins 109 serving to con! necteac'h gear 101 with the corresponding Located which, by movement in one direction or me other,"will engage one or the other of the rings 110, thereby rendering the corresponding clutch' 103 operative to connect its gear 101 with the shaft 102. Saidannulu's is provided with t-runnion's 112 which are engaged by va clutch fork 113 (see Fig. 3) operable by means of a shaft 114 journaled' in the gear casing92 andfhaving at itsouter `end an'operating handle 115. The collars 1072 permit an independent -adjustment of theil clutches 103, thereby making it possible conveniently to provide for a neutral position`\of the clutch controlling mechanism in which the lever 115 is substantially in alignment with the length of the truck, as shown in Fig. 2.

The motor e opposite theclutch member 86 with a beveled pinion 116 '(Fig. 9) which meshes with a beveled gear 117 on a' shaft 118 suitably journaled in the body 54. Fast on the shaft 118 is a pinion 119 which meshes with a gear'120 (see also Fig. 11) having a. hub u keyed or otherwise secured -to a shaft 121 journaled at one end in a suitable cover 122 (which, together with a` suitablyl formed portion of thefbody 54, constitutes a gear casing), and at its opposite end in the end of a hollow shaft 123 journaled in bearings 124 (see Fig. 12) 4supported by the bodyl 54. LooselyV mounted on the hub ofthe gear 120 vis a sprocket 125 which drives the cutter chain 59, said sprocket being adapted to be clutched to the gear 120. for rotation there- With by means of clutch pins 126 carried by a ring or annulus 127 connected by links 128 with arms 129 securedto a shaft 130 journaled in a bracket 131 secured to the gear cover 122, 'said shaft- 130 having an arm-'i132 to which' isconnected a slide rod shaft 87 is provided at its end` -loo 1 or clutch shifter 133 having a'handle 134 (see-also Fig. 2), whereby the actuation of.

the feed chain 59 maybe controlled.

The .shaft 123 is provided with an' arm 135 (Figs. I2, 11, and 12) to which the cutter bar 58 is secured, said arm and cutter bar being slightly oii'set to bring the latter substantially into alignment with the sprocket 125.

For moving the cutting mechanism longitudinally in the ways 53, and also for swinging the cutter bar 58 about its axis, tluid pressure (preferably hydraulic) mechanism is employed, said mechanism comprising the reservoir 54, above referred to, and which contains a suitable'liquid, preferably oil, a hydraulic motor for moving the cutting mechanism in its ways, a hydraulic inotoi for swinging the cutter bar about its pivot, pressure mechanism, herein shown as a pump, for drawing liquid from the reser- -voir 54 and delivering the saine under pressure to said motors, and suitable conduit and valve 'devices tor distributing and controlling the supply ot pressure to said motors.

rlhe pressure pump, as shown most clearly in Figs. 9 and 11, comprises a pump cylindei` 13G having an inlet valve 137 controlling communication between said cylinder'v and the tank or reservoir 54, and an outlet valve 138 controlling an outlet passage 139 having a spring loaded relief valve 140 adapted to discharge liquid from said outlet passagey Referring particularly to Figs. 6 and 10,

the motor for swinging the cutter bar upon its axis comprises a cylinder 1&7 suitably supported by a portion of the body 5d, and within which is a piston 148 to which is connected at its forward side a piston rod '1119 pivoted at its opposite end to a block 150 slidahly mounted in the forked end oil an arm 151 hired to the shaft 123, whereby reciprocation of the piston 1418 in the cylinder 1-17 causes angular movement oit said sliait i222, and consequent swiingingl inoveinent of the cutter bar carried thereby, forward moveinent ot said piston causing said cutter bar to be swung upwardly and rearward moveincnt thereol causing said bar to be swung downwardly.y Communicating through a pipe union 152 with the discharge passage 139 ot the pump, is a pipe 152 having two cul-cil' valves and lli-land communicating at its opposite end with the tank or rcscrvoir ti-lf't. lloniiiiuiiicu'ting willi the pipe between the pump and the liist valve l53, is a pipe 155 leading to the llorward end oit Lacanau the cylinder lll-7. Leading from the pipe 155 and communicating at its opposite end with the tank or reservoir 54:, is a pipe 15G having two cut-oil' valves 157 and 158, said pipe having a branch 159 leading therefrom betweensaid valves and communicating with the rear end of the cylinder 147. o

The cross sectional area of the piston rod 1-19 is preferably less than one-half of the cross sectional area of the piston 148, so that, while the pressure area at the forward side of said piston is less than the pressure area at the rear side of said piston, it is greater than the. cross sectional area of the piston rod. It will be observed that when the valve 158 is open and the valve 157 is closed', the pipes 155` and 156 constitute conduit means connecting the opposite ends of the cylinder 1117 and communicating also with the source ot' pressure, or pump. Atthis time, both sides of the piston 148 will be subjected to equal pressure, but inasmuch as the area of tlie rear side of the piston is greater than that of the forward side thereof, the total pressures will be unbalanced, causing the piston to move forwardly. Duringthis forward movement, the liquid in the orward end of the cylinder will be forced through the pipes 155 and 156 into the rear end thereof, so that the liquid supplied by the pump will be only suilicient to compensate for the difference etween the two piston pressure areas. In other words, the volume of liquid required to cause the piston 148 to travel forwardly 1a given distance will be equal to that distance multiplied by the cross sectional area of the piston rod 149. If the valve 158 be closed and the valve 157 opened, liquid will be forced by the pump into the forward end only of the cylinder 147, the liquid in the rear end of said cylinder being discharged or exhausted therefrom through the pipes 159 and 156 into the tank or reservoir 54a. At this time, the amount of liquid supplied by the pump will correspond to the pressure area at theforward side of the piston 148, that is to say, the volume of liquid required to cause the piston to travel rearwardly a given distance, will be equal to that distance multiplied by the pressure area at the forward side of the piston. From the foregoing it will be seen that, the supply of liquid delivered by the pump being constant, the ratio of the speed of forward travel ot the piston to the speed ci' rearward travel thereof will be equal to the ratio of the torward piston pressure area to the cross sectional arca ci" the piston rod 149. As above stated, the forward pressure 'arca ot the pisloii "lil-il is greater than the; cross sectional area olf the piston rod lll-Sl, so that the ici'- ward movement of said piston will be at greater speed than the rearward movement thereelf, thus providing` lor ii'grelatively rapid upward swinging movement ci? the cutter har and a relatively slow. downward swinging movement thereof.

By closing both of the valves 157- and 158,l

the liquid in the rear end ofthe cylinder 147 will be Atrapped therein, while the forward end of said cylinder will be subjected to the 1 pump pressure applied through the pipe 155.

Inasmuch as at thls time the piston 148 cannot,on `account of the trapped liquid, move rearwardly under the influence of the pres` sure applied to the forward side thereof, said piston 'willbe held stationary, thereby lholding the lcutter bar with considerable rigidity in any angular position into which it may have been swung. At this time, the

excess liquid delivered under pressure by the` pump .to the outlet passage 139 will be dislill ' charged therefrom through the loaded relief valve 1 4() into the tank or reservoir 54, the loading of said relief valve determining the pressure or force with which said cutter bar 1s held in adjusted position.

As an auxiliary means for holding said cutter bar against angular movement, as when the pump is idle during' times when the machine is not in operation, or when repairs are bein made, the shaft 123 is pro vided with a rake drum 160 (see Figs. l1

" and 2) withwhich cooperates a brake bandv 161 adapted to be tightened about said drum by means of a hand nut 162 on a threaded` rod 163V pivoted to the body 54. y The brake 161 may also be employed to supplement the action of the hydraulic motor in holding the cutter bar' against swinging movement,-

'L lside of the body 54,' and is bolted or otherwise 'secured thereto, -Operating in the `cylinder 164 is a piston 165having 'a piston rod 166 to vwhich is secured a crosshead 167 having a dove-tailed projection 186 guided in undercut ways 187 ion the turret. The

f crosshead 167 carries a pair of cylinders 168 arranged parallel to the cylinder 164 and longitudinall movable in guides 169 carried by said cylin erl 164. Working in the cylinders 168 are pistons 170 having piston rods 171 guided in the crosshead 1,67 and connected at their ends by a crosshead 172 having a stem`17 3 swiveled in a block 174 having trunnions 17 'journaled in brackets 176 carried b the cross bar 72. By the foregoing, it wil be seen Ithat rearward movement of the pistons 165 and 170 in the cylinders 164 and 168 will cause forward movement of the body 54 in the ways`53, while movement of said pistons in the oppositefdirection in their respective cylinders will cause rearward movement of said body. e

Leading from thel pipe 155 is a branch pipe 177 communicatin with the rear end'- of the'cylinder164, while leading 'from the pipe 152 between the valves 153 and 154, is a pipe 178 communicating with. the forwardend of said cylinder. The piston rod 166is 'formed' withv two concentric passages 179 and 180, the former communicating `with the cylinder 164 in advance of the piston 165, and the latter communicating with said cylinder in rear of said piston. The passage 179 communicates with a chamber 181 in the crosshead 167 which chamber communicates,

pipes 183 leading to the forward ends of the cylinders 168. The passage 180 communicates with'a chamber 184 in the crossheadY 1.67, said chamber communicating, 'in turn,

through passages 185 in said crosshead, with" the rear ends of the cylinders 168.

By these connections, it will bev seen, the forward ends of all three cylinders are in communication with one another, as are also the' rearward ends thereof, so that fluidpressure in either end of any cylinder will be through passages 182 in said crosshead, with V communicated 4to the corresponding ends of the other cylinders. It will also be seen that vthe connections above described between the cylinders 164 and 168 andthe pump, on the one hand, and between said cylindersand the tank orreservoir 54, on the other, are substantially similar to the corresponding con nections, above described, to and from the: cylinder 147. It vwill therefore be understood that, by closing the valve 154v Vand opening the valve 153, the cylinders 164 and 168 will be caused to move forwardly Ywith 'respect to their respective pistons. that by closing the valve 153 and opening the valve 154 said cylinders will vbe caused to move rearwardly with respect to said pistons, and that by closing both valves 153-and 154 said cylinders will be held immovable withdrespect to their respective pistons. The cross sectional areas of theplston rods 166 and 171, however, are substantially equal to oner half of the cross sectional areas of their reence in speed in the latter ca'se being, as

above explained, due to the difference between the cross sectional area of the piston rod and the smaller pressure area of the piston.

In Figs. 17 to 23 is illustrated the operation of the machine in entry cutting, that 1s to say, in cutting kerfs in substantially the vertical plane ot the center line of the machine. In Fig. 22 the machine is illustrated as in condition for transportation about the mine, the turret being in its normal angular .position with the ways 53 extending longitudinally of" the machine, the clutch shifter 133 being in a position to disconnect the cutter chain sprocket 125 from the gear 120, the valves 153, 154, 157, and 158 being closed to retain the cutting mechanism in its rearmost position and the cutter bar in a horizontal position, the clutch 86, 88 and one ofthe clutches 103 being in engagement to connect the truck propelling mechanism with the motor 55, andthe jacks being in horizontal position in their brackets 66. Having arrived at the end of an entry which isto be further driven, the clutch controlling lever 115 is moved into `neutral position to stop the travel of the truck, the jacks are turned into an inclined position, as shown in Fi 17, and the lower and upper ends thereof'a justed to engage firmly the bottom and roof of the mine, respectively, thereby rigidly bracing the ways 53 against movement in any direction, and the clutchshifter 133 operated to start the cutter chain. The valve 158 is lthen opened (the valve 157 remaining closed) to cause the cutter bar 58 to be swung upwardly into the position shown in Fig. 18, this upward movement being an idle one and being, as above explained, relatively rapid. The valve 158 is then closed, thereby rigidly retaining the cutter bar in this posltion. The valve 153 is then opened (the valve 154 remaining closed) to cause a for ward movement of the cutting mechanism, thereby causing the cutter bar to enter the face to produce the sumping cut, as shown in Fig. 19. The valve 153 is then closed, causing the cutting mechanism to vbe rigidly held in its forward position, andthe valve 157 opened, causing the iston 148 to move slowly backwardly and tie cutter bar to be swung downwardly from the position shown in Fig. 19 into that shown in Fig. 20, thereby making a vertical cut. The valve 157 being again closed to cause the cutter bar to be rigidly held in its last position, the valve 154 is opened, causing the feeding mechanism to move rearwardly into the position shown in Figs. 21 and 23 and causing the cutter bar to complete the cut.

It will be seen that, by virtue of the arrangement above described, whereby the cutter bar is permitted to move in a vertical plane between the ways 53, said ways may be extended as close as desirable to the* face to be cut, thereby supporting and guidingl 1,esa,7aa

In Figs. 24 and 25 is illustrated the operation of the machine in cutting vertical kerfs in a face substantially parallel to the track upon which the machine travels, as in openmg a room neck or a cross entry. VFor this purpose the turret is turned about its pivot in one direction or the other, depending upon the face to be cut, into an angular p0- sition substantially 90.from its normal position, the operation of the machine being otherwise substantially identical with that above described in connection with entry cutting.` l

It will, of course, be understood that the turret may be turned into any desired angular position in accordance with the requirements of the work.

While I have in this application specilically 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 other forms without departing from its spirit or the 'scope of the ap ended claims.

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

,1. In a' mining machine, apair of parallel ways, cutting mechanism movable longitudinally in said ways during cutting operation, said cutting mechanism including a motor. a cutter bar having cutting elements and bodily Ull movable during cutting in a position whercin it extends between said ways and also adinstable to cut a kerf above said ways, said cutting elements being arranged to cuta korf to admit the bar, and means deriving power from said motor for transmitting power from one end thereof to swing said bar and actuate said cutting elements.

2. In a -mining machine, 4a pair ofparallel ways and cutting mechanism including a motor movable longitudinally in said ways during operation thereohsaid cutting mechanism including a cutting element carrying cutter bar movable between said ways and operative to cut a kerf partially above and partially below the plane of said ways, said cutting elements being arranged to cut a kerf to admit the bar and said motor having at one end thereof a power transmitting element transmitting power to effect longitudinal movement of said cutting mechainsin and actuation of said cutting elements.

3. In a mining machine, a pair ofparallel,l

ways and cutting mechanism' movable longitudinally in said ways said cutting mechanism including a motor and a pivoted cutter bar the latter having cutting elements and mounted to' swing to cut that portion of the plane which passes through said pair of ways that lies between said ways, said cutting elemcnts.bcing arranged to cut a korf to. admit the bar, andmeans operable by said motor for transmitting power from one lill) 4llo end thereof to swing said 'bar and to actuate said cutting elements.

4.. In a. mining machine, a pair of' parallel ways'. and cutting mechanism-movable lonelements being arranged to eut a kerf to admit the bar and'said motor having at one end thereof a power transmitting element transmitting power to 'effect .l longitudinal- Amovement of said cutting mechanism, swinging of said bar and orbital movementgof saldi cutting elements.

l 5. Ina mining machine, a pair of parallel ways, and cutting mechanism movable in said ways, said cutting mechanism comprising a motor, a cutter bar and a cutterchain car--l rieel by said bar and actuated by said motor, said cutter bar being mounted to permit a portion thereof` to be swung between said ways where-by the orbit of said chain may lie in a plane between said ways and partially on one side and partially on the other. of a plane passing through said pair of ways, said chain being arranged to cut a kerf to admit the chain and bar and means operable by said motor for transmitting power from one end thereof to swing. saidv bar and aetuate said cutting elements.

6. In a mining apparatus, a pair of ways, cutting mecha-msm movable longitudinally v along said ways, said cutting mechanism 1ncluding a motor and a pivoted cutter bar, the

latter having cutting elements and carrying cutting means and having adjacent the free end thereof a pivotf about which said cutting means nieves, said cutter bar being adapted to swing between said ways between posit-ions in which said pivot is above and below the plane of said ways and said cutting elements heilig arranged to cut a kerf to admit said bar, andmeans operable by said motor for transmitting power from one end thereof to swing sai-d bar and to actuate said cutting elements. i

`'i'. In a mining machine, a pair of parallel waysdisposed in a substantially horizontal plane` and cutting mechanism movable long'itudinally in said ways, said cutting mechanism including a motor and acutter bar having orbit-ally "moving cutting. .elements and movable between said ways in a vertical plane and operative to cut above said ways` said cutting ele-ments being arranged to cut a kerf to admit said bar and said motor having at one end thereof a power transmitting element transmitting power to effect longitudinal movement of said cutting moelianisni and actuation of 'said cutting elements.

8. In a mining machine-a pair of parallel ways disposed in a substantially horizontal plane, and cutting mechanism movable-longitudinally in said ways, said cuttingjf mechanism including a motor and arpivoted cutting element carrying cutter bar mounted. to swing in a vertical plane t-o cut the portion of `the plane lying between said ways, said motor having at one end thereof a power transmitting element transmitting power to etl'ectflongitudinal movement of said cutting mechanism and swinging of said bar and said c uttfing elcn'i'ent carrying bar being arranged#l to cut a kerf into which it is atlmissible. l

'9, In a mining apparatus, a portable base, a pair of parallel ways "carried thereby and a mining machine movable upon said waysa-ndhaving a plane kerf-cutting mechanism movable between said ways with the plane thereof making an angle with the plane passing throughlsaidways'and adapted to .eut a kerf above said ways in which said kerfeuttingmechanism is admissible, said mining machine comprising a motor having at one end thereof a power transmitting element effecting cutting operation'of said kerf cutting mechanism aiid to effect 'longitudinalmovement of said machine in said ways.

base, a pair of parallel ways-carried thereby and projecting beyond the base, and a mining machine movable along said ways and having a cutting mechanism operative to cut a kerf in which said mechanism is admissible, in a vertical plane lying between said ways' and' either above or'below the. plane passing through said ways, said machinecomprising a motor having at one end thereof' ai power transmitting element providingA power to effect bai' adjustmentv and longitudinal feed of said' machine along said ways.

11. In a mining apparatus, a portable base, a pair of parallel ways carried thereby, and a mining machine having a cutting mechanism a portion of which is swingable through between said ways and adapted to cut a kerf above and below said waysinto which kerf the said cutting'mechanism is admissible, said machine comprising a motor having atone end thereof a power transmitting element providing power to ctl'ect. bar swing-and longitudinal feed of' said iliachine along said ways.

12. In a mining apparatus a portable base, a. pair of. parallelfways carried thereby, and amining machine having a swinging cutter bar and movable. along on top of said ways. said machine being operative to move said vbar in a position intermediate said ways and to cut a kerf into which said bar is admissible, in a plane at an `angle to` the plane of said ways and extending on opposite sides'thereof, said machine comprising a motor having a power transmitting elelill ment .a't one end thereofoperative to transmitpower to eiect the functioning recited.

13. In a mining machine, a pair of projecting parallel ways, supporting means for the projecting portions of said waysfor maintaining them in fixed angular relation lo theface to be cut, a cutting mechanism supported on said ways and .including a plane cutter bar having circulating cutting elements and a motor or causing said elements to traverse an orbit about said bar, said elements being arranged to cut a kerl? to admit said bar, and means for effecting movement ofsaid cutting mechanism bodily longitudinally of said ways with said cutter bar in position to cut a kerf in a plane which makes an angle with the plane which passes through said pair of ways and whose intersection with the latter plane is parallel to said ways and lies between the latter, said motor having a power shaft from one end of which power is transmitted to cause the traversing of said cutting elements of their orbit and the bodily longitudinal movement of said cutting mechanism.

14. In a mining machine, a pair of projecting parallel ways, supporting' means for the projecting portions of said waysfor maintaining them in fixed angular relation to the face to be cut, a cutting mechanism supported on said ways and including a plane cutter bar having circulating cutting elements and a motor for causing said elements to traverse an orbit about said bar, vsaid elements beingarranged to cut a kerf to admit said bar,and means for effecting movement of said cutting mechanism bodily longitudinally of said ways and for moving said cutter bar to cut a kerf in a plane which makes an angle with the plane which passes through said pair of Ways and whose intersection with the latter plane is parallel to said ways and lies between the latter, said motor having a power shaft from one end of which power is transmitted to cause the traversing of said cutting elements of their orbit and the bodily longitudinal movement of said cutting mechanism.

l5. In a mining machine, a pair of projecting parallel ways, supportin means for thc projecting portions of sai ways for maintaining them in ixed angular relation to the face to be cut and spaced above the mine betteln, cutting mechanism supported in said ways and movable longitudinally therein and swingable therebetween, said cutting mechanism including a cutter'bar provided with circulating cutting elements arranged to cut a kerf to admit the bar and a motor for driving said cutting elements and moving said bar to ositions in which its median longitudinal line makes dilerent angies with its rejection perpendicularly on the portion ci) theplane of the ways lyin between said ways, means forholding sai bar in said adjusted positions, and means for moving said cutting mechanism bodily lonsritudinally of said ways in opposite .directions while the bar is held in such adjusted positions. Y

16. In a mining machine, -a truck, a pair of parallel horizontal ways carried thereby and normally projecting therefrom in parallelism with the longitudinal axis of the truck, a plane pivoted cutter bar having a mounting slidable in the ways and adjustable about its pivot to positions in which its free end lies respectively above and below a given horizontal plane, said bar being so pivotcd that its plane intersects the plane of said'ways along a line parallel to and intermediate said ways, and self-contained power means including a single motor for adjusting said bar to a position with its free end at one side of a given horizontal plane, maintaining it therein and moving the same bodily a'long said ways into the face to be cut, swinging said bar to move its free end to the opposite side of said given horizontal plane while its pivot remains stationary and moving said bar bodily rearwardly along said ways in the position last mentioned.

17. In a mining machine, a truck, a pair of parallel horizontal ways carried thereby and normally projecting therefrom in parallelism with the longitudinal axis of' the truck, a pivoted plane critter bar having a mounting movable along the ways and adjustable about its pivot to positions in which its free end lies respectively above and bclow a horizontal plane including the pivot of the cutter bar, said cutter bar being so pivotcd that its plane intersects the plane of said ways along a 'line parallel to and intermediate said ways, and self-contained power means including a single motor for adjusting said bar to a position with its tree end at one side of said horizontal plane, maintaining it therein and moving the same bodily along said ways into the face to be cut. swinging said bar to move its free end to the op iosite side of said given horizontal plane while its pivot remains stationary and moving said bar bodily rearwardly along said ways in the position last mentioned.

18. In a mining apparatus, a track supported truck. a pair of parallel guidewaysl having portions projecting therefrom, slipporting means movable in said guideways, cutter mechanism thereon comprising a pivotal'ly mounted cutter bar having an orbitally moving chain adapted to cut a` kerf Afor i said bar in a face when said bar is presented edgewise thereto, into which kerl the bar is admissible, the plane of the orbit of said chain intersecting the plane of said guideways in a line parallel to and intermediate said guidcways, and self-contained ower operated means for moving said bar odily rectilinearly of the guideways, about its lllll lill . into close proximity assenso pivot inthe same plane, andreversely rectilinearly of the `guideways to. insert a par` ing therefrom, cutter mechanism movable along said guideways comprising a pivotally mounted cutter bar operating betweensaid ways having a chain adapted to cut a, `kerf for said bar in a face when said bar is presented edgewise thereto, into which kerf the bar is admissible, and self-contained ower operated means for moving said bar vodily recti'linearly relative to the guideways, about its pivot in the same plane, and reversely rectilinearly to insert a. parallel-edged kerf in a face in front of the guideways, of which kerf the edges are respectively on opposite sides of the plane of said guideways and to the plane of which kerf the guideways are parallel and at opposite sides thereof.

adapted for transportation about a mine,

parallel guideways mounted on said sup-` port and having portions projecting therefrom adapted to haveone end thereof moved to the face to be cut, and cutting mechanism including supporting means movable in said guideways and Ia pivoted cutter bar, and self-contained power means for swinging said cutter bar through a sector between the lines of the guideways, portions of said sector lying on opposite sides of'a plane passing through said guideways.

21. In a mining machine, in combination, a support, a turret mounted to turn on said support and having a pair of parallel guideways projectingtherefrom. and cuttin mechanism movable longitudinally in sai ways, said cutting mechanism including a cutting element carrying cutter bar arranged to out a kerf into-which it is admissiblel and movable through a path whichlcuts the` por' tion of a plane passing through said ways which lies between the' ways and 'a motor having at one end thereof a power transmitting element transmitting power to actuate anism comprising a motor having at onecnd thereof a power transmission connection transmittlng power to eli'ect operation of said cutting mechanism and movement o f along saidv ways.

23. In a mining machine, in combinatio a support, a turret mounted to turn on sai support and having a pair of arallel ways, and cutting mechanism mova le longitudinally in said ways, said cutting mechanism including a pivoted c utter bar mounted to swing in a path cutting the plane between the ways in that portion thereof included between the ways, anda motor having at one" end thereof a powerl transmitting element supplying power to swing said bar and theremove said cutting mechanism longitudinally in said ways.

24. In a mining machine, in combination, a support, a turret mounted to turn about a vertical axis on said support and having a pair of parallel ways disposed in a substantially horizontal plane, and cutting mechlanism movable longitudinally in said ways,

said cutting mechanism includin a cutting said waysin a vertical plane and operatiye to cut abovesaid ways and to enter the kerf element-carrying cutterbar mova le between 20. In a mining' apparatus, a support cutand a motor having at one end thereof a power transmitting element transmitting power to actuate said cutting elements and to effect longitudinal movement of said cutting mechamsm in said ways.

' 2 5. In a mining machine, in combination, a portable base, a turret mounted to turn on said support and provided with ways, the widthof said base being substantially the same as that of said ways, 'and cutti mechanism longitudinally movable in sa1d Ways and including a plane cutterbar operative to cut al'ong'the entire edge thereofand to enter the kerf cut and swinging in a plane making an angle with the plane of said ways,

the edge of said angle lying between the ways, and a motor having at one end there# of a power transmitting element supplying power toswing said bar and move said cutting mechanism longitudinally in said ways. 26. In a mining machine, in combination, a support, a turretmounted to turn on said support and provided with open ended ways mounted inthe same plane, and a cuttin mechanisml longitudinally movable in sai ways and including a pivoted cutter bar adapted to be swung across the plane of said ways and provided with cutting elements arranged to cut a kerf to admit the bar, said cutting mechanism also including a motor having a power shaft provided at one end with a power transmitting connection supplying power to 'swing said bar and to effect longitudinal feed of said cutting elements, said bar in certain positions of said'cutting mechanis'n lying between the open ends of said ways.

y27. 'In a mining machine, in combination, a support, va turret mounted to turn on said support and provided with projecting open ended ways mounted in substantially-the same plane as said turret, and a cutting mechanism including a pivoted cutter bar movable across the plane of said ways during the cutting operation, and provided with Vcutting elements arranged to cut a kerf to admit the bar, saidl cutting mechanism also including a motor having a power shaft' provided at one end with a power vtransmitting connection su plying power to swing said bar and to e ect longitudinal feed of said cutting elements.

28. In a mining machine, a truck, a pivotally connected frame thereon normally dis posed longitudinally thereof and movable into a transverse position thereon, said frame including a plurality of longitudinally extending guides, and cutting mechanism disposed longitudinally of said frame andincluding a pivoted cutter bar movable between said guides and provided with cutting elements arranged to cut a lrerf to admit the bar, `said cuttingv mechanism also including a motor having a power shaft provided at one end with a power transmitting connection supplying power to swing said bar and to effect longitudinal feedof said cutting elements.

29. In a mining machine, a truck, a pivotally connected frame thereon normally disposed longitudinally thereof and movable into a transverse position thereon, said frame including a plurality of longitudinally extending guides, and cutting mechanism dis- -posed longitudinally of said frame and adapted to swing between said guides and to enter the kerf formed thereby during cutting, said cutting mechanism comprisin an actuating motor having a power shaft e ecting cutting operation oit' said cutting mechf anism and also longitudinal movement and swinging of the latter.

30. In a mining machine, a truck, a pivotally connected frame thereon normally disposed longitudinally thereof` and movable into a transverse position thereon, said frame including a plurality of longitudinally extending. horizontal guides, cutting mechanism 1sposed longitudinally of said frame and including a pivoted cutter bar movable thereon relative to said truck and4 adapted to swing between said guides andto enter the kerf formed during cutting, and a motor movable longitudinally along said frame with said cutter bar and having at one end thereof a power transmitting element transmitting power to effect feed of said motor and bar and swing of said bar.

31. In a mining machine, a truck, a pivotally connect-ed guide frame thereon normally disposed longitudinally thereof and movable into a transverse position thereon, said frame comprisin horizontally spaced longitudinally exten ing guide members,

`and cutting mechanism disposed longitudinally of said frame and com rising a plane hert cutter movable lougitu inally of said guide frame and lpivotally mounted'ffor swinging movement betweenl said guidev` members and operative to cut a kerf into which said cutter is admissible, and a mot-or movable longitudinally along said frame with said cutter bar and having yat one end thereof a power transmitting element transmitting power to effect feed of said motor and bar andfswing of said bar.

32. In a mining machine, in combination,

a support, a turret mounted to turn on said ot said cutting mechanism and to swing' said bar, and means for angularly position mgsaid turret and locking the same, said bar lying substantially midway between the sides of said turret.

33. In a mining machine, in combination, a support, a turret mounted to turn on said support, cutting mechanism including a ver- `tically swinging cutter bar carried by said turret and provided with cutting elements arranged to cut a kerf to admit the bar,

locking bolts on said support, and stops on said turret cooperating with said bolts, said bolts being adapted to serve as abutments to stop movements of said turret as the latter is turned to transport position.

34. In a mining machine, in combination` a support, a turret mounted to turn on said support, cutting mechanism carried by said turret including a cutter bar, said mechanism being operable to make a shearing cut into which the major portion of the bar is admissible, bolts on said support, and stops on said turret adapted to cooperate with said bolts, said bolts when extended being respectively engageable by said stops as the.

turret is Vturned in opposite directions and stopping the latter when the desired position is reached.

35. In a mining machine, the combination with a truck and means for propelling the same, including a .primary driving shaft on said truck and flexible drivingl connections driven thereby, of a turret mountedA to turn on said truck, cutting mechanism carried by said turret, said cutting mechanism inclnding a motor and a vertically swinging cutter bar provided with cutting devices arl ranged to cut a kerf to'admit said bar, and means for operatively connecting said motor and the primary driving shaft of said truck propelling means when said turret is in one angular position only.

36. In a mining machine, the combination with a truck and means for propelling the same, including a primary driving shaft on said truck and flexible driving connections driven thereby, of a turret mounted to turn .on said truck, cutting mechanism carried by said turret, said cutting mechanism including a motor and a vertically swinging cutter bar provided with cutting devices arranged to cut a kerf to admit said bar, means for operat-ively connecting said motoriand the primary driving shaft of said truck pro- .f

pelling means when said turret is in one angular position, said'means being disconsaid'turret and movable in opposite direc-v tions in said ways during cutting, a clutch member operatively connected with said motor, and a clutch member operatively connected with said truck propelling means `whereby said motor and truck propelling means may be 'operativelyconnected when said turret is in one angular position.

38. In a mlning machlne, the combination with a truck and means for propelling the same, of a turret mounted to turn on said' truck, cutting mechanism including a motor carried by said turret, av clutch f orbperatively connecting said motor and truck propelling means when said turret isf in one member carried'by said cutting mechanism and a cooperating member, and a universal joint connecting said last named clutch member with said propelling means.

39. In a mining machine, the combination with a truck andmeans for p opelling the same, of a turret mounted to urn on said truck and provided with ways, cutting mechanism carriedby said turret and movablein said ways, means for reciprocating said cutting mechanism in saidlways during the operation of4 said cutting mechanism, said cutting mechanism including ya swinging cutter bar and a motor, a socket carried by said cutting mechanism, and-means includinga clutch member within said lsocket for operatively connecting said motor and truck propelling means when said turret is in one angulariposition.

40. In a mining machine, the combination with a truck and means for propelling the same,-o a turretmounted to turn on said truck, cutting mechanism carried by. said turret, said cutting'mechanism including a vertically swinging cutter bar and 'a motor, a socket carried by said cutting mechanism, a clutch member within said socket operrovided Iwith ways, cutting atively connected with said motor, and a 'I' clutch member operatively connected with said' truck propelling means and movable into and outof said socket, whereby said' .iiiotoiwand truck propelling'means may be operatively connected when said turrety is Lin one angular position. v

4l.'l In a` mining machine, the combination with a pivoted cutter bar having orbitally moving cutting elements, said barl being swingable to cut with'its full length a horizontalplane passing through its pivot, of fluid pressure actuating means for exerting a constant swinging force on said cutter bar `including means movable in opposite directions by the direct action of uid pressure thereon to swing the same in opposite directions in the plane o'f-said orbit and giving Ia different speed in each direction auto'- mat-ically during cutting operation,

42. In a mining machlne, the combination with a movable cutter bar provided with cutting elements. operative when the bar is presented in 'one direction upon engagement with the coal to eut a kerf and clear the cuttings from said kerf, of mechanism cooperating w'ith said cutter bar and adapted to impart to the same a predetermined relatively slow movement in such direction and on mere reversal a predetermined relatively quick movement in the opposite direction, said mechanism comprising a rectilinearly reciprocable bar moving force transmitting element and means for diferentially applying power to said element in its opposite directions of reciprocatory movement respectively. angular position, said clutch including a 43. In a mining machine, the lcombination with a pivotally movable cutter bar provided with cutting elements operative when the ba-ris' swung in one direction upon engageinent'with the coal to cut a kerf and clear the cuttings from said kerf, of mechanism adapted to swing said bar at a predetermined relatively slow Vrate in such direction and on mei'e reversal to swing it in the opposite direction at a predetermined relatively quick rate. said mechanism comprising a rectilinearly reciprocable bar swinging force transmitting element 'and means for differentially applying power to said element in its opposite directions of reciprocatory movement respectively. f

44. In a mining machine, the combination with a movable cutter bar provided with cutting elements operative when the bar is presented in one direction upon engagement with the coal to cut a korf and clear the cuttings from said kerf, of mechanism cooperating with said cutter bar and adapted to impart to the same a predetermined relatively slow movement in such direction and a predetermined relatively quiclr movement in tlie'opposite direction, said means including a Huid pressure motor for moving' said bar,

and means for supplying motive fluid to said motor, said motor and fluid supplying means cooperating through dill'erent pressure areas in the motor to give said cutter bar such predetermined relatively slow and quick movements.

45, In a mining machine, the combination with a pivotally movable cutter bar provided with cutting elements operative when the bar is swung in one direction upon 'engagement With the coal to cut a kerf and 'clear the cuttings from said kerf, of mechanism adapted to swing said bar at a predetermined relatively slow rate in such direction and to swing it in the opposite direction at a predetermined relatively quick rate, said means includingr a luid pressure lnotor for swinging said bar, and means for supplying motive fluid to said motor, said motor and fluid supplying means cooperating through diferent pressure areas in the `Inotor to give said cutter bar such predetermined relatively slow and quick swinging movements.

46. In a: mining machine, the combination with a turret mounted pivotally movable cutter bar, of a fluid pressure motor for actuatingsaid cutter bar, and self-contained means carried by said turret for supplying motive fluid to said motor, said motor and fluid supplying means being constructed to give sa1d cutter bar a. relatively quick movement in one direction and a relatively slow movement in the opposite direction under the action of fluid pressure.

47. The combination with a mining machine having a lmovable cutter bar, of a cutter bar actuating means comprisin a cylinder, a piston therein having opposite relatively' small and large pressure areas, conduit means connecting the opposite ends of said cylinder, and controlling means for supplying liquid under pressure at a uniform rate of flow through said conduit means to act on both of said pressure areas, or for admitting liquid under pressure to said small pressure area only, While exhausting liquid from said large pressure area.

48. iIn a mining machine, the combination with a movable cutter bar, of a liuid pressure motor for swinging said cutter bar at one speed in one direction and at a diierent speed in another direction, said motor comrising a cylinder and a piston therein havmg opposite relatively small and large pressure areas, conduit means connecting the op- "posite ends of said cylinder, and controlling means for supplying fluid pressure through said conduit means at a uniform rate to act on both of said pressure areas, or for admitting fluid pressure to said small pressure area'. only, while exhausting fluid pressure from said large pressure area.

4:9.` In a mining machine, the combinationl with a movable cutter bar, of a hydraulic motor for actuating said cutter bar, said motor comprising a cylinder and a piston therein havingopposite relatively small and large pressure areas, conduit means connecting the opposite ends'of said cylinder, a liquid reservoir, a'. pump for drawing liquid `from said reservoir and supplying the same to said motor at a uniform rate, a'nd controlling means for placing said conduit means in communication with said pump, or for placing said sma'll pressure area only in communication with said pump,- while placing said large pressure area in communication with said reservoir.A

50. The combination with a mining ma-- chine having a turret mounted cutter ba'r, of

a cutter bar actuating means comprising a hydraulic motor having a cylinder and a piston therein, said piston having opposite relatively Sina-ll and large pressure arcas, conduit means connecting the opposite ends of said cylinder, a liquid reservoir carried by the turret, a pump for drawing liquid from said reservoir and supplying the same to said more than one half of the latter, conduit means connecting the opposite ends of said cylinder, and controlling means for supplying fluid pressure through said conduit means at a constant rate to act on both of y said pressure areas, or for admitting fluid pressure to said small pressure area only, while exhausting fluid pressurefrom' said large pressure area.

52. In a mining machine, the combination with a movable cutter bar, of a fluid pressure motor for positively actuating said cutter bar in either of two opposite movements, said motor comprising a cylinder and a piston therein having a. piston rod secured thereto at one side, thereby providing said piston with opposite relatively small and large pressure areas, conduit means connecting the opposite ends of said cylinder, and controlling means for supplying fluid pressure through said conduit means at a'. constant rate to act on both of said pressure areas, or for admitting fluid pressure to said small pressure area only, While exhausting fluid pressure from said large pressure area.

53. In a. mining machine, the combination with a movable cutter bar, of a fluid pressure motor for actuating said cutter bar, said motor comprising a cylinderfand a piston therein having a piston rod secured thereto at one side, thereby providing said piston with opposite relatively small'and large pressure areas, the cross sectional area of said piston rod being less than one halt that of the piston, conduit means connecting the opposite ends ofn said cylinder, and

controlling means for supplying luid pressure at a constant rate through said conduit means to ac t on both of said pressure areas or for admitting fluid pressure to said small pressure area only While exhausting said piston While placing the portion of saidA cylinder at the opposite side of said piston incommunication With said pump..

55. In a mining machine, the combination with cutting mechanism including a movable cutter bar, of fluid pressure actuatedA means for moving said cutting mechanism toward' and from the work and comprising overlapping staggeredcylinders and pistons.

56. In a mining machine, the combination with cutting mechanism including a movable cutter bar, of a hydraulic motor for moving said cutting mechanism toward and from the work, a hydraulic motor for actuating said cutter bar, a liquid tank into which both of lsaid hydraulic motors exhaust, a pump for drawing liquid from said tank. and supplying the same to both of said' motors, and valve devices `for independently controlling said motors', all of said mechanism being .mounted yon a single bed and movable as 'a whole by said first mentioned motor.

57'. The combination with a mining apparatus comprising a truck. .a turret. mounted on said truck, and provided withv Ways,a mining machine on said ways, and a cutter bar carried by said machine and movable relatively thereto, of a mining machine actuating means comprising a,y hydraulic motor having relatively movable members, one of Iwhich is connected to the turret and another to said mining machine, and a cutter bar actuating means comprising` a hydraulic motor carried by said turret.

58. The combination with a mining api pai'atus comprising a truck,'a turret movably mounted on said. truck, and provided with ways, a mining machine on said Ways, and a cutter bar carried by said minmg machine and ,movable relatively thereto,of a mining,

machine actuating means comprising a hydraulic motorv havingiflatively movable members, one of Which-fis, connected to the turret and another to-'sfa'idv mining machine,

a` cutter bar actuating means comprising a hydraulic motor carried by said turret, a liquid tank carried by said turret, and a pump also carried by said turret for drawing liquid from said tank and supplying the same to both of said motors.

59. The combination with a mining apparatus comprising a truck, a Vturret movably mounted on said track, and provided with ways, a mining machine yon said Ways, and a cutter bar carried by said mining machine and movablev relatively thereto, of a mining machine actuating means comprising a hydraulic motor having relatlvely movable members, oneot which is connected to the` turret and another to said truck,` a cutter bar actuating means comprising` a hydraulic motor carried by said turret, a liquid tank carried'by said turret, aV pump also carried by said turret for drawing liquid from said tank and supplying the same to both of said motors and valve devices for independently controlling said motors.

60. 'In a mining machine, the combination with cutting mechanism, of a fluid pressure motor for moving said cutting mechanismytoward and trom the Work, said motor including a cylinder and a piston therein having opposite relatively small and large pressure areas, the former beingv approximately one halt of the latter, conduit means connecting the opposite ends of said cylinder, and controlling means for supplying fluid pressure through said-conduit means at a constant rate to act on both of said pressure areas, or for admitting iuid pressure to said small pressure area only, while exhausting Huid pressure from said large pressure area. 61. In a mining machine, the combination with cutting mechanism, of a hydraulic pressure motor for moving said cutting mechanism toward and from the Work, said motor including a cylinder2 andl a piston therein having a piston rod secured thereto at one side, thereby providing said piston with opposite relativelyv small and large pressure areas, conduit means connecting the opposite ends 'of said cylinder, and controlling means for supplying liquid through said conduit means at a uniform rate to act on both of said pressure areas, or for admitting liquid to said small pressure area only, while connecting said large pressure area to exhaust. v

62. In a mining machine, the combination with cutting mechanism, of ahydraulic pressure motor for moving said cutting mechanism toward and from the Work, said motor including a cylinder and a piston therein having a piston rodsecured thereto at one side, thereby providing said piston with opposi'te relatively small and large pressure areas, the cross sectional area of said pistou los

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