US1979265A

US1979265A - Mining apparatus

Info

Publication number: US1979265A
Application number: US138661A
Authority: US
Inventors: Morris P Holmes
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1926-09-30
Filing date: 1926-09-30
Publication date: 1934-11-06
Anticipated expiration: 1951-11-06

Description

Nov. 6, .1934. M. P. HOLMES MINING APPARATUS Filed Sept. 30, 1926` 4 Sheets-Sheet 2 do Tiwy NOV. 6, 1934. M p. HQLMES 1,979,265

MINING APPARATUS Filed Sepb. 30 19.26 4 Sheets-Sheet 3 www J www 4 Sheets-Sheet 4 M. P. HOLMES MINING APPARATUS Filed Sept. 30

IML. l

Nov. 6, 1934.

Imm!! aavvaqy.

Patented Nov. 6, 1934 i BHNING APPARATUS "Merris Holmes, "Claremont, N; H.; assgnor to Sullivan Machinery Company, a corporation of .'Massacliusetts Applicaticnfeptember 30, 1926,-Serial No. 138,661

i `-6G Claims. (Cl. 26?.-28)

"fllhis invention relates to mining apparatus and more particularly to miningimachines: of 1 theV sol'ie'alledll shear or f vertical cutter Atype .adapted l to .'operate lfrom :the mine` trackway.

An: objectfof` this invention` is y'toprovide lan improved mining machineofithe wheel mounted .ftype 'wherein' theamining` machine is adapted to i insert ashearw or vertical cut` inthecoa'l facewhile r-inounted'` on themine trackvay.- Still another .wie lobjectfof` this invention is to provide animproved the' mine `trackwayzduringl transport. "These and?.

- other objects of. my invention'will, however, hereinaiter4 more .fully appear.

"f Theinvention is exempliiedin the novel'comlA fbinations; andrarrangement: ofi parts isliotvnin.` .the accompanying drawingsiandadescribed inthe Vfol- .:zgfo lowing.: .speciiicationgand scfmore. particularly :pointed: out infthe .appendedxclaims vcn the:accompanying ldrawings Ixhavexshown f l forpurposesf ofiillustration one formwhichfrny 'invention may assume in -practice. InthesedrawingsliFig. 1 is a side elevationof-the improved mining apparatus,`-` the front'supportingjack beingshownr inoperative position .andthe cutter bar being @Oshownin a"plu1ality:of positions.

figshownin Fig.,1,.parts.b.eing broken away to facili- ...tateillustration f Fig; 3,l is atransversehorizontal sectionalview 44 *45...taken substantially on-line-Sf-S of Fig. 1,parts ,1. s being Ashawn implan.

L-1 ig. 4 is. a--vertical transverse sectional viewv :tekent/substantially on vline 4 4 of'Figs. lf-and 3. i Figa 5f, is a detail `sectional viewtaken-oncline y e-fFig.. Llgcthe:controlling handlebeing shown @in acplurality; of.- positions.

#Figc 6` is. a detail plan View illustrating the ai clutch-lever. and locking; means therefor.

Fig. `'7 is. ai--sectionaliview'ftaken on line` 1 -7 35e-fof Figa 6.

'f'shearing machine adapted tocutkerfs in aver- -trating the clamp formaintainng the supporting jack inv itsdifl'erentadjusted positions.

. Eig. Z-.is a.,plan.viewofj the mining ,apparatus The guide rails 6 form a guiding frame for the -machine and are rigidly held in lateral spaced Fig. 8 is a developed sectional View taken suby stantiallv on line 8-8'0f Fig. 1.

Fig. 9 is a detail'sectional viewv takenon line 9 9 of Fig. 1, illustrating the guiding frame.

i Fig. y10 is a-detail view illustrating the guidesilf-GO for the feed cable.

Fig. 11 is a detail: sectional view of theclamp `for .the forward. end of the feed cable, the view being taken on line 11-11` of Fig. 1.

Fig. 12 is a sectional viewtakenon line 12a-12u65 vof Fig. l1, illustratingfdetails of the cableclamp.

Fig. 13 is a detail View illustrating thesupporting jack for-the forward end of thelguiderails,

the raised position of the support being .indi- Fig. -14 is a transverse vertical sectional view 14 of Fig. 13, .the view.il1us Fig.` l5 is altransverse vertical sectional view't Vtaken substantially online 15,-15 of Fig. 1.

Fig 16 is` ar detail view partially. in section ...illustratingthe `mechanism for rvarying the tensionof theltruck driving chain.

.- Fig. 17` is ardetaillviewof. the lockingmecha-TSO nism'forpreventing tilting and lateralmovement of. the guiding frame.

rFig. `18Y is a transversevertical sectional view taken substantially lon line `18---18 of Fig. 17.

` Figs. 19 and 2O are diagrammatic views illus-".65

`trating differentfoperations of the 4machineduring cutting.

s In this illustrative'embodiment of myinvention Iwhave shown a truck-frame 1 mountedv on wheels 2 `adapted to Vmove relative to a. mine` L00 trackway 3 in the usuali manner. The truck frame 1 comprises parallel longitudinallyextending angle `members 4 which support at their forward ends a roller mounted swivel plate 5` movable in a horizontal plane about a vertical axis. 9a

The `plate .has fixed thereto parallel guiding members or guide rails 6 extending longitudinally ofthe-truck frame and projecting at a substantial distance from the forward end of the'latter.

relation by means of the plate 5 and av transverse angle member 7 connected at the rear end to the guide rails 6. iAs shown a cutting mechanism generally designated 8, having a general rectangular elongated frame 9 including a plate 10 disposed `in the vertical plane is rigidly secured as by bolts l1 `(see Fig. 9) to longitudinally spaced plate members 12 extending transversely of .the apparatus and these platemembers in turn are 110 secured at their opposite ends by bolts 13 to guide members 14 which slidably engage the guide rails 6 as clearly shown in Fig. 9. The plates 12 and the guide members 14 when united form brackets or supports for the cutting mechanism. Further, the cutting mechanism includes an elongated plane cutter bar 15 about the outer edges of which a cutter bit carrying cutter chain 16 is adapted to be circulated. The cutter chain is adapted to be driven by means of a usual drive sprocket 17 as clearly shown in Fig. 6. The cutter chain drive sprocket 17 is disposed at the front end of the frame 9 of the cutting mechanism and is rotatable about a horizontal axis extending transversely of the frame in a well known manner. As shown, the elongated cutter bar 15 is pivoted, as at 18, on an axis coincident with the axis of the cutter chain sprocket 17 and is journaled on the machine frame on a bearing `memberv19 secured, as by rivets 20, to the vertical plate 10. A usual electric cable reel 21 is suitably supported on the rear end of the truck fra-me 1 and power medium is adapted to be transmitted to the motor of the mining machine through

conductor cables

22 and 23 leading respectively to the reel and to the cutting mechanism driving motor, not shown. The cable reel isI adapted to reel in or pay out the conductor cable 22 as the truck moves in opposite directions along the mine trackway. The motor is horizontally disposed and extends longitudinally of the machine and is herein preferably of the usual reversible electric type. 'Ihis motor is adapted to Idrive from its forward end the cutter chain sprocket 17 to circulate the cutter chain about the cutter bar, and from its rear end the improved means for swinging'the bar about its pivot, the improved means for moving the cuttinggmechanism relative to the truck guiding frame, and the improved means for driving the truck wheels as hereinafter more fully described.v

In specifically describing the improved mechanism for moving the cutting mechanism relative to the guiding frame, it will herein be observed that the rear end of the horizontally disposed longitudinally extending armature shaft 24 of the driving motor (see Fig. 3) has suitably secured thereto a spur pinion 25 which meshes with a larger spur gear 26 rotatable on a parallel axis and disposed in the same horizontal plane as the axis of the pinion 25. As shown, this gear 26 in turn has suitably secured thereto a bevel pinion 27 which meshes `with a larger bevel gear 28 rotatable in a vertical plane. The gear 28 is suitably secured as by a key 29 to a main driving shaft 30 disposed on a horizontal axis extending transversely of the cutting mechanism. The shaft 30 is adapted to drive suitable gearing substantially similar to that described in my prior Patent No. 1,470,570 patented October 9, 1923 and which includes a suitable friction clutch, not shown, and

fast and slow speed transmission gearing including a final spur gear 31 suitably secured to a sleeve 32 journaled upon a stud 32a, the latter being disposed parallel with and in the rear of the main driving shaft 30. In accordance with this invention the sleeve 32 has secured thereto as by ay key 33, a feed drum 34 rotatable in a vertical plane, and this feed drum is adapted to be driven through the transmission gearing clearly described in thepatent mentioned above at a fast speed in one direction or at a slow speed in the opposite direction without reversing the motor and under the control of means including suitable manually

operable levers

35 and 36 in the usual manner as is likewise described in the above mentioned patent. In this instance the feed drum 34 cooperates with a flexible feeding element 37 herein preferably in the form of a cable or wire rope. A suitable guide roll or sheave 38 is provided and is rotatable on the frame of the cutting mechanism on an axis parallel with and below the feed drum 34 and this sheave guides the cable 37 relative to the feed drum. As illustrated the cable 37 is wound or coiled about the feed drum and extends from beneath the drum as clearly shown in Fig. 1 and is xed at this end to an adjustable abutment 39 secured as by bolts to the transverse bracing member 7 for the guide rails 6. The other end of the cable 37 extends from the top of the feed drum downwardly around the guide roll 38 and forwardly around

guide members

40 and 41, respectively secured to the rear and front plates 12 on which the cutting mechanism is supported. The

guide members

40 and 41 have arcuate guiding surfaces and the cable extends from the member 41 forwardly alongside one of the guide rails 6 and is secured at its forward end by a clamping device generally designated 42 to the adjacent guide rail, an opening 43 being formed in the web ofthe latter to permit the cable to pass therethrough. As shown in Figs. 11 and 12 the clamp 42 4specifically comprises plate members 44 secured, as by rivets 45, to the opposite sides of the web of the guide rail 6. Extending transversely through these plates 44 and the web of the rail are parallel bolts 46 and these bolts when tightened force the clamping

elements

47 and 48 into clamping engagement with the bent Vend of the cable 37.V From the foregoing description it will be evident that when the feed drum 34 is rotated in one direction the cutting, mechanism may be slid longitudinally relative to the guide rails 6 in one direction at a slow or cutting speed and when the rotation of the feed drum is reversed the cutting mechanism may be slid longitudinally in an opposite direction at a fast speed, the cutting mechanism moving bodily relative to the feed cable. A stop member 48a is provided for limiting the rearward movement of the cutting mechanism relative to the guide rails (see Fig. 2).

In specifically describing the improved bar swinging means, Yit will be observed that the outer reduced end of the main driving shaft 30 is jourlnaled in ball bearings 49 carried within a detachable retaining plate 50 suitably secured to the vertical plate 10 of the cutting mechanism frame. The shaft 30 has keyed thereto a bevel pinion 51 which constantly meshes with

larger bevel gears

52 and 53, these gears being rotatable in opposite directions and constituting a reversing mechanism. The bevel gears 52 and 53 are journaled on bearing sleeves 54 carried by a horizontal shaft 55 disposed longitudinally of the machine and at one side of the latter. The shaft 55 in turn is journaled at its opposite ends in ball bearings 56 suitably carried by a gear casing or housing 57 secured by screws 58 to the vertical plate 10 of the cutting mechanism frame. Carried within each of the bevel gears 52 and 53 is a series of clutch disks 59 which are interleaved with a series of clutch disks 60 carried by each of the clutch housing members 61 keyed as at 62 adjacent the opposite ends of the shaft 55. Interposed between the

gears

52 and 53 and encircling the hubs a roller equipped shipper yoke 65 is provided, the il..

rosl

rollers of whichengage plane surfaces 44of theV clutch applying members 63sand11641..and`=thisl shipper yoke rotates on a verticallydisposed shaft the housing `57 as shown in Fig. 4. The sleeve portion 63 of the shipper yoke 65 has connectedi thereto at its upper end by means of asemiper' marient clutch 69 a member 70 Yhavinggear teeth 71 formed thereon and these gear teeth mesh with teeth formed on a gear segment 72 securedat the' lower end of a vertically disposed shaft -73 rotatably mounted on the gear housing 57. "The shaft 73 has secured thereto, at its upper end, an operating lever 74. The lever 7e is adapted Vto be locked in its different operative positions by means of a vertically movable locking pin75 (see' Fig. 7) adapted to cooperate withapertures 76 vformed within locking 4members 77 `and73 re clamping bolts 80.

by means of a pivoted lever 81 respectively engag- I A4.o

ing at its opposite ends the pin 75 and a spring pressed operating member or rod 82 slidably mounted in the grasping portion 33 of the lever 74. The rod 32 has an operating member or button 84 secured at its upper end. It will thus' be evident that when the operator pushesdown` wardly on the button 84 the lever 81 swings about; its pivot and the locking pin is forced upwardly' from its locking aperture. The lever 74 may then be swung-consequently moving the shipper yoke about its pivot and the desired

clutch

59 and 60 applied, thereby connecting one l,or the other ofi the bevel gears 52, 53 in operative driving relation with the shaft 55, rotating the latter selectively in opposite directions. Secured, as'by a key 35,

to 'the forward end of the shaft `55 is a clutch member 36 which is adapted to be connected in` ing relation with a clutch member'l by meansA ax' ily movable clutch memberISS. Ihe` .ig mec an nected at 93@ to a sliding `block 94a guided in an elongated horizontal slot a formed inthe bracket 91. As shown, the arm 96 is pivot-ally connected at its forward end as at 97 to a radiallyl extending arm 93 (see Fig. 8) carried by a member 99. The member 99 is preferably composed of two parts rigidly secured together by screws 103 and one of these parts is bent outwardly asat at its :forward end and is secured asv by bolts 10.2 to a lateral projection 103 rigidly secured to cutter bar 15. From the foregoing description it will be evident that when theshaft 55 is, connected to one of the '

bevel gears

52 and 53 and when 'the gears 86 and 37 are connected by the per clutch. as sh wnin Fig. the

-' e rotated in one direction. conseaxial inovementof nut 93 relative thereto and causing the cutter bar l5 to ci :for clutch member 33 is to ubestvung at abutting: speed in one direction `about its ,pir/013113. ".When. theshaft 55 is connected to :inthe otherfofizthe

bevel gears

52 and 53 the screw 66 having a drive t with the bores 67.formed in'.` isi rotated .in .an opposite direction and con- Lsequentlyithe bar isswung about its pivot at a `cutting-:speed: in :the opposite direction. The

'worm `or screw. 39 is self-locking.

wIn specifically describing the improved means :for drivingthe truck` wheels from the motor of fthe cutting `mechanism 8 it will be observed that securedtol the rear end of the shaft 55 (see '3) is a clutch member 104 which is adapted to `sbe1connecied to a clutch member 105 by means of. axially movable clutch member 10S. As shown: theclutch member 105 is formed integral nwith a longitudinally extending shaft 107 arranged coasr'ally` withtheshat- 55 supported in iitsoperative position in alinernent with the shaft -.55. by .the .clutchL member 106 and having secured. thereto at its rear end, as by a key 103, .an `element '109. o' a universal joint 110 of a *well knownform, another element 111 of the :universal joint being keyed, as at 112, to a shaft ..1'13. .The shaft 113 is suitably journaled in a 4.gear housing or casingll/i suitably supported on .'theirear cndof the truck frame 1 (see Figs. 1, 2 and.15).` The clutchA members 38 and 105are :adapted to be axially shifted by means of shipper yokes `115 and .116 respectively suitably secured 'at the opposite ends of an actuating shaft or rod .:117i` slidablyimounted within lateral lugs 113 formed Orr-the gear housing 57. As shown, longitudinallyspaced stop pins 119 are carried by the rod 117xand are adapted to alternatively engage the inner sides of the lugs 118, thereby preventi ingexcessivexzmovement of the shipper gears. `"I"i'ierrod 117 is `vertically slotted, at 120, inter- ,.'mediate itszends, and cooperating with this slot 4maintain the stop pins 119 against one or the iotheizof the lugsllg. 1t will thus be evident that when the lever .121 is grasped by the operator and swung about its pivot` to effect forward aziial :movement-'0f therod 117 the clutch members 86, 37 `are connected by the clutch member 33, while thelclutch members `104, 105 are disconnected by y fthe clutch-,member 103. When the shipper rod i117 isslidgaxially Vin an opposite direction the i clutch n1embe1s86, 37 arcreleased and the clutch ;,members v1011, 10S-arc connecte It will :further be evident that the `

clutch members

37 and 105 `may only be alternatively driven. In again rcierring to the truck wheel driving mechanism is `willbe noted that the shaft 113 has secured thereto, at its rearend, a bevel gear 127 (sec igs. 2. and 15) which, meshed with a bevel `gear 12S secured' to a horizontal transversely Vextending truck driving shaft 129 suitably jour- -naledat its opposite in bail bearings 30 carriedby the gear housing 114. Secured to the end of the shaft 129 opposite from the gear -li30is a chain sprocket 131 which is adapted to drive a chain connection 132. The chain 132 passes around guide sprockets 133 and 131i. (see Fig. 1) and extends forwardly about a chain sprocket 135 suitably secured to the rear truck axle. Thefront and rear truck axles connected by means or a suitable chain and sprocket connection 136. It will also be noted that the guide sprocket 133 is suitably secured to a transversely extending horizontal shaft 137 journaled at its opposite ends in roller bearings 138 carried by a slidable frame member 139, the sprocket 134 also being carried by this member. The

- shaft 137 alsohas secured thereto a driving pulley 140 which is connected by a belt connection 141 to a pulley 142 suitably secured to the cable reel 21. The tension of the chain 132 is adapted to be adjusted by means of a set screw 143 carried by a portion of the truck frame and engaging the sliding frame 139 by which the

sprockets

133, 134 are carried. The sliding frame 139 is adapted to be rigidly secured in its adjusted positions by means of bolt and slot connections 144, the bolts threadedly engaging a transverse horizontal plate 145 secured at its opposite ends to the angle members 4 of the truck frame 1 (see also Fig. 15).

improved means are provided for maintaining the guide rails 6 against tilting and lateral movement and such means comprises, as clearly shown in Figs. 1, 17 and 18, supporting members 146 riveted, as at 147, to the outer surfaces of the angle members 4 of the truck frame. As shown, the members 146 have plane horizontal upper surfaces 148 upon which angle members 149 riveted to the guide rails 6 are adapted to rest. In accordance with this invention, the members 146 have formed integral therewith depending bosses or lugs 159 having transverse bores 151 within which a rod 152 is journaled, the rod 152 being horizontal and disposed transversely of the truck. One end of the rod 152 has secured thereto, as by a set screw 153, an operating lever 154. Secured to the rod 152 at the end thereof opposite from the lever 154 is a vertical stop plate 155 which is adapted to engage an abutment element 156 riveted to the upstanding iiange of the adjacent angle member 149. The abutment member 156 and the stop plate 155 prevent lateral movement of the guide rails relative to the supporting members 146. shaft 152, between the hub of the lever 154 and the adjacent supporting member 146, is a locking plate 157 having an arcuate open ended slot 158 which is adapted to embrace a locking pin 159 secured to the adjacent angle member 149. This slotted stop plate 157 is adapted to be locked in engagement with the pin 159 by means of a latch 160 pivotally connected, as at 161, to the stop plate 157. When it is desired to swing the guide rails about the axis of the swivel plate 5 the operator may grasp the lever 154 and after release of the latch 169 the slotted stop plate 157 and the stop plate 155 may be swung downwardly to the position indicated by dotted lines in Fig. 17, thereby releasing the guide rails.

It will also be observed that improved means are provided for supporting the forward end of the guide rails 6 during operation of the machine. This improved supporting means comprises bracket members 162 riveted to the outer end of each of the guide rails 6 and these brackets 162 each have pivotally connected thereto, as at 163, a supporting link 164, the links in turn being pivotally connected, as at 165, to the opposite ends of a shoe 166. As shown, also pivotally connected, as at 167, to the ends of the shoe 166 are other supporting links 168, the latter in turn each being pivotally connected, as at 169, to a clamping device generally designated 170 engageable with the rails 6. The clamping devices 170 each comprise, as shown in Fig. 14, a bracket member 171 having an inwardly projecting lip portion 172 engaging one side of the bottom flange of the guide rail. Threadedly connected, as at Also secured to theA 173, to the member 171 is a screw 174 having pivotally connected thereto, as at 175, an operating lever 176. The screw 174 is provided with an enlarged head portion 177 which is adapted to engage a clamp member 1.78 which in turn engages the opposite side of the bottom flange of the guide rail. Referring to Fig. 13 it will be observed that when it is desired tolift the shoe 166 from the mine bottom to a position above the top of the mine trackway as indicated by dotted lines, the operator grasps the levers 176 and releases the clamps 178. 1t is then possible to slidev the clamps bodily rearwardly along the anges of the guide rails until the shoe assumes the dotted line position shown in Fig. 13. The clamp 178 is then* again tightened and the supporting means is consequently secured in its inoperative position.

Suite-bly secured to the rear truck axle is a frictional braking device 179 (see Fig. 2) and this braking device is adapted to be operated through` i connections 180 and 181, the rear end of the latter connection being connected to an operating lever 182. This frictional braking device is adapted to control rotation of the truck wheels when the mining apparatus is moving over a trackway hav- '100 ing a steep gradient and is also adapted to lock the truck wheels in position during the cutting operation.

Inthe operation of my improved mining apparatus, it will be noted that when the latter isf moving rapidly about the mine the clutch 59, 60 is applied, the bevel gear 52 is connected to drive the shaft 55, and

clutch members

104, 105 are connected by the clutch member 106, it being understood that the motor and consequently the`l shaft 113 are rotating. The shaft 113 drives through the bevel gears 127, 128 the shaft 129, the

chain sprocket connection

131, 132 and 135, the latter being connected to the truck wheels.

It is obvious that when it is desired to drive theV mining apparatus rearwardly the gear 52 is released from the shaft 55 and the gear 53 is connected by means of its controlling clutch 59, 6i) to the shaft. When the machine is disposed adjacent the working face as shown in Fig. 19 120 the operator disconnects the gear 52 from the shaft, disconnects the

clutch members

104, 105, and locks the truck wheels 2 in position by means of the frictional braking device 179. The clamp 170 is then suitably adjusted and the supporting.. 125

shoe 166 is lowered to the mine bottom, the clamp 170 then again being tightened. r)The operator then connects the clutch members 86 and 37 by means of the clutch member 88 and the clutch 59,

60 is again applied, connecting the gear 52 to 130 the shaft 55 and the screw 89 is rotated, effecting axial movement of the nut 93 and consequently swinging the cutter bar 15 upwardly about its pivot to the position indicated at A in Fig. 19,

thereafter the gear 52 being released from the 135 shaft 55 and rotation of the screw 89 is of course discontinued. The operator then suitably connects the cutter chain drive sprocket 17 to the motor and the cutter chain 16 is rapidly circulated about the outer edges of the cutter bar.

The

levers

35 and 36 are then suitably manipulated and the feed drum 34 is rotated at a slow speed, the cutting mechanism being fed relative to the cable 37 bodily along the guide frame,I

consequently moving the cutting mechanism out- 1.15

Wardly at a slow speed along the guide rails 6 to the position indicated by B in Fig. 19, thereby enacting a sumping cut. After the cutter bar assumes the position B, rotation of the feed drum 34 isdiscontinued. The clutch 59, 60 is then 150 applied, connecting the bevel gear 53 with the shaft 55 and the screw 89 is then rotated in the opposite direction, effecting forward axial movement of the nut 93 and consequently causing the cutter bar to be swung downwardly at a cutting speed about its pivot to the position indicated by C in Fig. i9, the gear 53 thereafter being disconnected from the shaft 55. The operator then again suitably manipulates the levers 35, and the feed drum 34 is rotated at a fast speed in the opposite direction, thereby effecting movement off'the cutting mechanism rapidly rearwardly along the guide rails 6, consequently moving the cutter bar rearwardly until it assumes the position indicated at D in Fig. 15. After the cutting mechanism is retracted from the ifa-ce and has engaged the stop 48a rotation of the winding drum 34 is discontinued. The operator fapplies the clutch 59, 60, connecting the bevel gear 52 to the shaft 55 and the cutter bar is swung upwardly to the fullline position shown in Fig. l, the clutch thereafter being disconnected, The operator then raises the forward supporting means for the guide rails and the machine is moved rearwardly along the trackway, the cabi-e reel 2l reeling in the conductor cable at this time in the usual manner. When it is desired to maire a cut at one side of the trackway 3 the shaft 107 is swung upwardly to thedotted line position shown in Fig. l, the locking

plates

155, 157 are swung downwardly, and the guiding rails may then be swung laterally until they assume the position similar to that shown in Fig. 2G. The front guide rail supporting jack is then adjusted and upon suitable manipulation of the' clutches the bar is sumped into the coal, is then swung downwardly, and is retracted from the face a manner substantially similar to that described in connection with the cut described above. These and other operations of the imrcve'dmining apparatus will be clearly apparent to those skilled in the art. i

While I have this application specifically 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 modiiedA and embodied in various other forms without departing from its spirit or the scopeof the appended claims.

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

l. In a mining apparatus, a wheeled truck, a guiding frame on said truck, cutting mechanism on said guiding frame and movable therealong during cutting and including a cutter bar movable relative to said guiding frame and a driving motor, and means driven by said motor for driving the truck wheels and for moving said cutter bar in its plane including a reversing mechanism common to the drive of both said truck wheel driving means and said cutter bar moving means to effect drive thereof in either of opposite directions at the saine speeds and while said motor runs continuously in the same direction.

2. In a mining apparatus, a wheeled truck, a guiding frame on said truck, cutting mechanism on said guiding frame including a cutter bar l movabl relative to said guiding frame and a drivtions while said motor runs continuously in the same direction, and means driven by said motor for moving said cutting mechanism bodily longitudinally relative to said guiding frame.

3. In a mining apparatus, a wheeled truck, a guiding frame thereon, cutting mechanism slidably mounted on said guiding frame and including a driving element, a feed operating member, and a driving motor for said element and `member, said cutting mechanism being driven by said motor, feeding means operatively connected to said feed operating member for eecting moven; of said cutting mechanism relative to said gui frame to effect rectilinear movement of cutter during cutting while the latter rer-nains` ai a fixed angle relative to said guiding frame and including relatively rotatable mecl'ianicaliy engaged feeding elements having relative movement to effect feed, and means connectible to said driving element for driving the wheels of said truck.

4. In a mining apparatus, a wheeled truck, a guiding frame thereon, cutting mechanism slidably mounted on said guiding frame and including a driving element, a feed operating member, and a driving motor for said element and member, said cutting mechanism also including a pivoted cutter bar driven by said motor and including feeding means operatively connected to said feed operating member for effecting movement of said cutting mechanism relative to said guiding frame to effect rectilinear movement of said cutter bar during cutting and including relatively rotatable mechanically engaged feeding elements having relative movement to effect feed, means connectible to said driving element for driving the wheels oi said truck, and means driven by said motor for swinging said cutter bar about its pivot while said cutting mechanism remains stationary relative to said guiding frame.

5. In a mining apparatus, a wheeled truck, cutting mechanism thereon including an elongated pivoted plane cutter bar carrying an orbitally movable cutter chain and pivotally mounted to swing about an axis lying within the orbit of said cutter chain, and a power driven element, and means connectible to said element for alternatively swinging said cutter bar about its said pivot and for driving the wheels of said truck including means precluding simultaneous swinging of said bar and driving of said truck wheels.

6. In a mining apparatus, a wheeled truck, a guiding frame on said truck, cutting mechanism mounted on said guiding rame and movable therealong during cutting and including a pivoted cutter bar movable in a vertical plane and a driving motor, and means driven by said motor for swinging said bar and driving the truck wheels and including reversing mechanism common to said bar swinging and wheel driving i means for effecting drive thereof in opposite directions at the same speed while said motor runs continuously in the same direction.

7. In a mining apparatus, a wheeled truck, a guiding frame on said truck, cutting mechanism 140 mounted on said guiding frame and movable therealong during cutting and including a movable cutter bar movable in a vertical plane and a driving motor, and means driven by said motor for moving said bar and driving the truck wheels 145 and including reversing mechanism common to said bar moving and wheel driving means for effecting drive thereof in opposite directions at the same speed while said motor runs continuously in the same direction,

8. In a mining apparatus, a wheeled truck having amachine guiding frame and supplemental supporting means for the forward, end of said frame comprising a shoe engageable with the mine bottom, and links pivotally connecting said shoe to said frame, certain of said links having a sliding connection with said frame whereby the position of said shoe relative to said frame may be adjusted.

9. In a mining apparatus, a wheeled truck hav-- ing a machine guiding frame and supplemental supporting means for the forward end of said frame comprising a shoe engageable with the mine bottom, and links pivotally connecting said shoe to said frame, and means for adjusting the position of said shoe relative to said frame including additional links pivotally connected to said shoe and having sliding engagement'with said frame.

10. In a mining apparatus, a wheeled truck having a machine guiding frame and supplemental supporting means for the forward end of said frame comprising a shoe engageable with the mine bottom, and links pivotally connecting said shoe to said frame, and means for adjusting the position of said shoe relative to said frame including additional links pivotally connected to said shoe and having sliding engagement with said frame and clamping means engageable with the latter frame for clamping the last mentioned links to said frame in their different adjusted positions.

11. In a mining apparatus, a wheeled truck, a horizontalh7 extending guiding frame swiveled thereon, and supplemental supporting means for the forward end of said guiding frame including a bottom engaging shoe extending transversely of the truck upon the front end thereof, and means engaging the opposite ends of said shoe and adjustably connected to opposite sides of said guiding frame for vertically adjusting said shoe relative to said frame.

12. In a mining apparatus, a wheeled truck, a guiding frame swiveled thereon, and supplemental 'supporting means for the forward end of said frame including a bottom engaging shoe and elements connected to said shoe and having sliding engagement with said frame.

13. In aV mining apparatus, a wheeled truck frame, a guiding frame swiveled thereon, a machine body slidably mounted on said guiding frame and cutting mechanism carried by said body, and means carried by said truck frame' and engageable with said guiding frame for holding said guiding frame against lateral and vertical movement.

14. In a mining apparatus, a wheeled truck frame, a guiding frame swiveled thereon, a machine body slidably mounted on said guiding frame and carrying cutting mechanism, and means carried by said truck frame and engageable with said guiding frame for holding said guiding frame against lateral and vertical movement including a swingable stop member and a cooperating locking member.

15. In a mining apparatus, a wheeled truck frame, a guiding frame swiveled thereon, a machine body slidably mounted on said guiding frame and carrying cutting mechanism, and means carried by said truck frame for holding said guiding frame against lateral and vertical movement including a plurality of simultaneously swingable locking members.

16. In a mining apparatus, a wheeled truck frame, a guiding frame swiveled thereon, a machine body slidably mounted on said guiding' frame and carrying cutting mechanism, and means carried by said truck frame for holding said guiding frame against lateral and vertical movement including a swingable slotted stop member engageable with a locking pin carried by said guiding frame.

17. In av mining apparatus, a wheeled truck frame, a guiding frame swiveled thereon, a machine body slidably mounted on said guiding kframe and carrying cutting mechanism, and

means carried by said truck frame for holding said guiding frame against lateral and vertical movement including a plurality of locking members, and manually operable means for simultaneously releasing said members.

18. In a mining apparatus, cutting mechanism including an elongated pivoted cutter bar mounted for swinging movement in a vertical plane and carrying an orbitally movable cutter chain, and a driving motor, and means driven by said motor for swinging said cutter bar about its pivot comprising a rotatable screw disposed on an axis parallel with the longitudinal axis of the apparatus and rotatable in opposite directions to effect bar swing in opposite directions while said cutter chain moves in its orbit continuously in the same direction, and selectively operable reversing clutches arranged coaxially with said screw for controlling the direction of rotation thereof, and a nut cooperating with said screw, said screw and nut having relative rectilinear movement.

19. In a mining apparatus, a portable support having a horizontally extending guideway thereon, cutting mechanism slidably mounted on said guideway including an elongated cutter bit carhaving a horizontally extending guideway there- A; t

on, cutting mechanism slidably mounted on said guideway including an elongated cutter bit carrying cutter bar swingable in a vertical plane relative to said guideway to cut a vertical kerf, mechanism for effecting sliding movement of said cutting mechanism along said guideway including a rotatable power driven winding element disposed on a horizontal axis and carried by and movable with said cutting mechanism,

and a cooperating flexible feeding element en- 1l-1.

gaging between its ends said winding element and connected at its opposite ends to the opposite ends of said guideway, and mechanism driven from the same power source as said winding element for bodily propelling the apparatus.

21. In a mining apparatus, a portable support having a horizontally extending guideway thereon, cutting mechanism slidably mounted on said guideway including an elongated cutter bit cai'- rying cutter bar swingable in a vertical plane relative to said guideway to cut a vertical kerf, a driving motor for said cutting mechanism, mechanism for effecting sliding movement of said cutting mechanism along said guideway including a rotatable power driven winding element All 1,979,265 driven by said motor and carried by and movable with said cutting mechanism,.and a cooperating iiexible feeding element engagingbetween its` ends said winding element and connected at its :opposite ends to the opposite endsof said guideway, and mechanism driven by said motor for bodily propellingv the' apparatus.

22. In a miningV apparatus, a portable support having a horizontally extendingguideway thereon lollswingable laterallyrelative to said-support, cutting mechanism slidably mounted on said `guideway including anfelongated cutterbit .i carrying cutter bar swingable in a kvertical plane-'relative to said guideway to cut a vertical-kerf,` mechatnism for effecting sliding` movement of said cutting mechanism along said guideway including a rotatable power driven feeding element carried f by and movableY with said Icutting. mechanism, Y

and a cooperating `flexible` feedingielement en- 201i gaging said rotatable feeding elementand lcon-v nected to said guideway, and mechanism driven` from the samevpower source as said rotatable feeding elementforfbodilyl propelling the apparatus.

having a horizontally swingable guideway thereon, cutting mechanism slidably mounted on said guideway and including an elongated cutter bar swingable in a vertical plane relative to said guide- .f'svvay to cut a verticalA kerf and a driving motor having its axisestending .longitudinally of the apparatus and driving from its forward end said cutting mechanism, mechanism driven from the` rear end of said motor for eiecting sliding move- -,v.i rnent of said cutting mechanismalong said guide- [having a horizontally swingable guideway thereon, cutting mechanism slidably mounted on said guideway and including an elongated cutter-bar swingable in a vertical plane 'relative Ito said guideway to cut a vertical kerf and a driving motor` having `its axis extending longitudinally of the apparatus and driving from its forward end said cutting mechanism, and mechanism driven from the rear end of said motor `for effecting sliding movement of said cutting mechanism along said guideway and for swinging said cutter bar in its plane and for driving the Wheels of said support.

25. in a mining apparatus, a wheeled support adapted to run along a trackway, cutting mecha-` nism thereon including a swingable Vcutter bar,

a motor, and mechanism driven by said motor for swinging saidy cutter bar and for `driving the support wheels including shafting extending longitudinally of the apparatus at one side of the longitudinal axis thereof and connected to said cutter bar and said truck Wheels, said shafting including three alined shafts and means for effecting rotation of said central shaft in either of opposite directions while said motor runs continuously in the same direction and for connecting either of said other two shafts independently to said central shaft.

26. In a mining apparatus, a wheeled support adapted to run along a trackway, cutting mechanisin thereon including a swingable cutter bar,

a motor, and mechanism driven by said motor for swinging said cutter bar and for driving the support wheels including three alined shafts eX- tendinglongitudinally of the apparatus at one side noffth longitudinal-axis thereof, one shaftbeing 'Y 23.In a miningV apparatus, a portable support connected at its form and the other at its Wheels and clutches for of said sha 27. In a mining apparatus, a wheeled support adapted to run along a traclnvay, cutting mechanism thereon includinf7 cutter bar, a motor, and mechanism driven said motel' for swinging said cutter bar and for driving the support wheels including alined shafts extending longitudinally of the apparatus at one side of the longitudinal axis thereof, one shaft being connected at its forward end to said cutter bar and the other at its rearward end to the truck wheels, and a reversing mechanism coaxial with said to the truck ly connecting two Ashafts for effecting reversal of said shafts while the motor runs continuously in the same direction.

28. In a mining apparatus, a wheeled support adapted to run along a mine trac rway, cutting mechanism thereon including a frame and a swingable cutter bar pivotaliy mounted thereon, a motor carried by said frame, a transverse shaft driven by said motor and projecting laterally from said frame, and mechanism for swinging said cutter bar relative to said frame and driv- -ing the support. wheels including bar swinging and support wheel driving connections extending longitudinally of the apparatus and operatively connected independently of each other to said transverse shaft.

29. In a mining apparatus, a wheeled support adapted to run along a mine tracltway, cutting mechanism thereon including a frame and a swingable cutter bar pivotally mounted thereon. a motor carried by said 3i ame, a transverse shaft driven by said motor and projecting laterally from said frame, and mechanism for swinging said cutter bar relative to said frame and driving the support wheels including bar swinging and support wheel driving connections extending longitudinally of the apparatus at one side thereof and operativelyccnnected independently of each other to said transverse shaft.

30. In a mining apparatus, a wheeled support adapted to run along a mine traclivay, cutting mechanism thereon including a frame and a swingable cutter bar pivotally mounted thereon2 a motor carried by said frame, a transverse shaft driven by said motor and projecting laterally from said frame, and mechanism for swinging said cutter bar relative to said frame and driving the support wheels including bar swinging and support Wheel driving shafting extending longitudinally of the apparatus at one side thereof and operatively connected independently of each other to said transverse shaft.

31. In a mining apparatus, a Wheeled support adapted to run along a mine trackway, cutting mechanism thereon including a frame and a swingable cutter bar pivotally mounted thereon, a motor carried by said fran a transverse shaft driven by said motor and projecting laterally from said frame, and .mocha-n i for swinging said cutter bar relative to said flame and driving the support wheels including bar swinging and support wheel driving alined shafts extending longitudinally of the apparatus at one side thereof and operatively connected independently of each other to said transverse shaft, the To.

forward end of one shaft being operatively connected to said cutter bar and the rearward end of the other being operatively connected to said `truck wheels. y*

32. In a mining apparatus, a wheeled truck 315Go having a guiding frame, ay machine frame slidably mounted on said guiding frame and having a driving motor and cutting mechanism thereon including a cutter bar swingable in a vertical plane, and means driven by said motor for movin'I said machine frame relative to said guiding frame to effect rectilinear movement of said cutter bar during cutting comprising a feed operating member carried by the machine frame and a cooperating flexible element having its ends connected to the opposite ends of said frame, and means driven by said motor for driving the wheels of said truck.

33. In a mining apparatus, a wheeled truck, a machine frame thereon having a pivoted plane cutter bar thereon and a driving motor carried by said machine frame, and means driven by said motor for driving the wheels of said truck and for swinging said bar in its plane comprising a driving shaft, a bevel gear thereon, reverse bevels meshing with said gear, a driven shaft, and means for alternatively connecting said reverse bevels to said driven shaft to effect drive of said truck wheel driving means and said bar swinging means in either of opposite directions while said motor runs continuously in the same direction.

34. In a mining apparatus, a wheeled truck, a machine frame thereon having a pivoted plane cutter bar thereon and a driving motor carried by said machine frame, and means driven by said motor for driving the wheels of said truck and for swinging said bar in its plane comprising a driving shaft, a bevel gear thereon, reverse bevels meshing with said gear, a driven shaft, and means for alternatively connecting said reverse bevels to said driven shaft to effect drive of said truck wheel driving means and said bar swinging means in either of opposite directions while said motor runs continuously in the same direction, and operative connections between the truck wheels and the bar moving means and said latter shaft.

35. In a mining apparatus, a Wheeled truck, a machine frame mounted thereon having a cutter bar thereon mounted for swinging movement in a vertical piane and a driving motor carried by said machine frame, and means driven by said motor for only alternatively swinging said bar about its pivot in such. vertical plane and for driving the wheels of said truck and including common transmission mechanism.

36. In a mining apparatus, a wheeled truck having a guiding frame, a machine frame mounted thereon for bodily movement relative thereto', said machine frame having a pivoted cutter bar thereon and a driving motor carried by said machine frame, means driven by said motor for moving said machine frame relative'to said guiding frame during cutting with said cutter bar fixed against movement relative thereto including a feed drum carried by the machine frame and a ilexible cable cooperating with said drum and connectible at its ends to the opposite ends of said guiding frame, and mechanism driven by said motor for driving the truck wheels bodily to propel the apparatus.

37. In a mining apparatus, a wheeled truck, a machine framemounted thereon having an elongated pivoted cutter bar thereon mounted for swinging movement relative thereto in a ver-- tical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar about its pivot comprising a driven shaft rotatable on a horizontal axis and Lampes projecting laterally from the machine frame, a bevel gear carried by said shaft, reverse bevels meshing with said bevel gear and rotatable on an aXis parallel with the longitudinal axis of the machine frame, a driven shaft drivable in opposite directions by said reverse bevels, and means connectible to said latter shaft for alternatively moving said bar and for driving the wheels of said truck.

38. In a mining apparatus, a machine frame having an elongated pivoted cutter bar thereon mounted for swinging movement relative thereto in a vertical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar about its pivot while the latter remains stationary comprising a driven shaft rotatable on a horizontal axis and projecting laterally from the machine frame, a bevel gear carried by said shaft, reverse bevels meshing with said bevel gear and rotatable on an axis parallel with the longitudinal axis of the machine frame, a driven shaft drivable in opposite directions by said reverse bevels, relatively rotatable screw and nut elements, means for connecting one of said elements to said latter shaft, and connections between the other of said elements and said cutter bar.

39. In a mining apparatus, a machine frame having an elongated pivoted cutter bar thereon mounted for swinging movement relative thereto in a vertical plane and a driving motor carried by said machine frame, and means driven by said ymotor for swinging said bar about its pivot cornprising a driven shaft rotatable on a horizontal axis and projecting laterally from the machine frame, a bevel gear carried by said shaft, reverse bevels meshing with said bevel gear and rotatable on an axis parallel with the longitudinal axis of the machine frame, a driven shaft drivable in opposite directions by said reverse bevels, relatively rotatable screw and nut elements, means for connecting one of said elements to said latter shaft, and a pivoted link connection between the other of said elements and said cutter bar.

40. In a mining apparatus, a wheeled truck having a guidingframe, a machine frame slidably mounted thereon and having a cutter bar thereon movable relative thereto in a vertical plane and a driving motor carried by said machine frame, means driven by said motor for moving said bar and driving the wheels of said truck, and independent means for moving said machine frame relative to said guiding frame including a power driven drum, and a cooperating feed cable connected to said frame.

4l. In a mining apparatus, a wheeled truck, truck wheel driving means therefor, a machine frame on said truck having a cutter bar thereon movable relative thereto in a vertical plane and a driving motor carried by said machine frame, means for moving said bar in a vertical plane, means driven by said motor including a reversing mechanism, and means for only alternatively connecting the means for moving said bar in a vertical plane and the driving means for the truck wheels to said reversing mechanism.

e2. In a mining apparatus, a wheeled truck having a guiding frame, a machine frame slidably mounted thereon and having a cutter bar thereon mounted for swinging movement relative thereto in a vertical plane and a driving motor carried by said machine frame, means driven'by said motor for moving said machine.

frame slidingly relative to said guiding frame to effect rectilinear movement of said cutter bar during cutting, and means driven by said motor for driving the Wheels of said truck in opposite directions including a reversing mechanism carried by said machine frame.

43. In a mining apparatus, a wheeled truck having a guiding frame, a machine frame slidably mounted thereon and having a cutter bar thereon mounted for swinging movement relative thereto in a vertical plane and a driving motor carried by said machine frame, means driven by said motor for moving said machine frame slidingly relative to said guiding frame to effect rectilinear movement of said cutter bar during. cutting, and means driven by said motor for driving the wheels of said truck in opposite directions including selectively operable reversing clutches carried by said machine frame.

44. In a mining apparatus, a wheeled truck, a machine frame mounted thereon and having a cutter bar thereon swingable relative thereto in ua' vertical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar about its pivot in opposite directions comprising selectively operable reversing clutches, and a sliding clutch coaxial therewith.

45. In a mining apparatus, a wheeled truck, a machine frame mounted thereon and having a cutter bar thereon swingable relative thereto in a vertical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar in a vertical plane during cutting and for driving the wheels of said truck comprising a shaft, selectively operable reversingclutches for controlling the direction of rotation of said shaft, and means for alternatively connecting said wheel driving and said bar swinging means to said shaft.

46. In a mining apparatus, a wheeled truck, a machine frame mounted thereon and having a cutter bar thereon swingable relative thereto in avertical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar in its plane and for driving the wheels of said truck comprising a shaft,l selectively operable reversing clutches for controlling the direction of rotation of said shaft, and means for alternatively connecting said wheel driving and said bar swinging means to said shaft including sliding gear clutches coaxial .with said shaft.

' 47. AI n a mining apparatus, a wheeled truck, a

machine frame mounted thereon and having a cutter bar thereon swingable relative there to in a vertical plane and a driving motor carried by said machine frame, and means driven by said "motor for driving the wheels of said truck in opposite directions comprising selectively operable reversing clutches, and a sliding gear clutch coaxial therewith and disposed in the driving connections between the truck wheels and said reversing clutches.

48. In a mining apparatus, a wheeled truck having a guiding frame, a machine frame slidably mounted on said guiding frame and having a cutting mechanism thereon swingable relative thereto in a vertical plane, and a driving motor carried by said machine frame, means driven from the forward end of said motor for driving said cutting mechanism, and means driven from the rear end of said motor for swinging said cutting mechanism, for moving said machine frame relative to said guiding frame to effect rectilinear movement of said cutter bar during cutting, and for driving the Wheels of said truck.

49. In a mining apparatus, a wheeled truck, a machine frame mounted thereon having a cutter bar thereon swingable relative thereto in a vertical plane and a driving motor carried by said machine frame, and means driven by said motor for swingingsaid bar in its plane and for driving the wheels of said truck comprising coaxially arranged relatively rotatable truck driving and bar swinging shafts connectible only alternatively with said driving motor and constantly operative positive operating connections between said bar swinging shaft and said cutter bar. f

50. In a mining apparatus, a wheeled truck, a machine frame mounted thereon having a cutter bar thereon swingable relative thereto in a vertical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar in its plane during cutting and for driving the wheels of said truck comprising coaxially arranged truck driving and bar swinging shafts each individual to its own function and disposed on axes parallel with the longitudinal axis of the machine and positive operating connections between said bar swinging shaft and said cutter bar.

51. In a mining apparatus, afwheeled truck, a machine frame mounted thereon having a cutter bar thereon swingable relative thereto in a vertical plane and a driving motor carried by said machine frame, and means driven by said motor for swinging said bar in its plane and for driving the wheels of said truck comprising coaxially arranged truck driving and bar swinging shafts, and means `for alternatively connecting said shafts in driving relation with said motor.

52. In a mining apparatus, a wheeled truck, a machine frame thereon having a horizontal shaft disposedoon an axis Aextending transversely of the apparatus'and projecting laterally from said machine frame and a driving motor therefor carried by `said machine frame, and means driven by said motor for kdriving the wheels of said truck comprising a shaft disposed on an axis extending longitudinally `of Vand outside the machine frame and connected to said shaft, a shaft driven by said longitudinally extending shaft and disposed on an axis parallel with said first mentioned shaft, and connections between said last mentioned shaft and the truck wheels.

53. In a mining apparatus, a portable base, a horizontal guiding frame swiveled on said base on a vertical axis and having longitudinal guideways, a support mounted on said guiding frame for movement longitudinally of said guideways, a kerf cutter pivotally mounted on said support to swing vertically relative thereto about a horizontal axis extending transversely of said support, a motor on said support for driving said kerf cutter, means driven by said motor for swinging said kerf cutter about its pivot, means driven by said motor for moving said support longitudinally of said guiding frame, and means driven by said motor for propelling said base, said cutter swinging means and said base propelling means including common control means whereby when one is operative the other is always inoperative.

54. In a mining apparatus, a portable base, a horizontal guiding frame swiveled on said base on a vertical axis and having longitudinal guideways, a support mounted on said guiding frame for movement longitudinally of said guideways, a kerf cutter pivotally mounted on said support to swing vertically relative thereto about ahorizontal axis extending transversely ofr said support, a moto-r on said support for driving saidv kerf cutter, means driven by said motor for swinging said kerf cutter about its pivot,means driven by said motor for moving said support longitudinally of said guiding frame, and means driven by said motor for propelling said base, said cutter swinging means and said base vpropelling means including common control means whereby when one is operative the other is always inoperative, said control means including a common reverse mechanism whereby said cutter swinging and base propelling means may be operated in either of opposite directions. l

55. Ina mining apparatus, a portable base, a support on said base, a kerf cutter pivotally mounted on said support for swinging movement to cut a plane kerf, a motor on said support', means driven by said motor for actuating the kerf cutter, a horizontal shaft driven by said motor and journaled on said support on an axis extending transversely of said support, alined horizontal shafts extending longitudinally of Said support, meansfor connecting said transverse shaft in driving relation with said longitudinal shafts, means driven by one longitudinal shaft for swinging said kerf cutter about its pivot, and means drivenby said other longitudinal shaft for propelling said base. f

56. In a mining apparatus, a portablefbaseja support on said base, akerf cutter 4pivotally mounted on said support, a motor on said support, means driven by said motor for actuating the kerf cutter, a horizontal shaft driven by said motor andjournaled on said supporton an axis extending transversely of said support," alined horizontal shafts extending longitudinally of said support, means for connecting said transverse shaft in driving relation with said longitudinal shafts, means driven by one longitudinal shaft for swinging said kerf cutter about its pivot, and

means driven by said other longitudinal shaft for Y propelling said base, said connecting means including a reverse mechanism driven by said transj 57. In a mining apparatus, a portable base,l

a horizontal guiding frame swiveled on said base on a vertical axis, a support mounted on'said guiding frame for longitudinal movement therealong, a kerf cutter pivotally mounted ,on said support, a motor on said support for actuating said kerfcutter, a horizontal shaft driven byl said` motor and extending transversely of said sup-y port, means driven by said shaft for moving saidV support longitudinally of said guiding frame, means driven by said shaft for swinging said kerf cutter about its pivot, and means driven by said shaft for propelling said base.

58. Ina mining apparatus, a portable base, a horizontal guiding frame swiveled on said base on a vertical axis, a support mounted on said` guiding frame for longitudinal movement therealong, a kerf cutter pivotally mounted on said support, a motor on said support for actuating said kerf cutter, a horizontal shaft driven by said mo-VL tor and extending transversely of said support;

horizontal shafts extending longitudinally of saidy support, means for connecting said longitudinal shafts in driving relation with said transverse shaft, means driven by one of said longitudinalshafts for swinging said kerf cutter about its pivot, and means driven by the other of said longitudinal shafts for propelling said base.

59. In a mining apparatus, a portable base, a horizontal guiding frame swiveled on said base on'a vertical axis, a support mounted on'said guiding frame for longitudinal movement therealong, a kerf cutter pivotally mounted on said support, a motor on said support for actuating said kerf cutter, a horizontal shaft driven by said motor and extending transversely of said support,

horizontal shafts extending longitudinally of said v tudinal shafts for propelling said base, said connecting means including afreverse mechanism betweensaid transverse shaft and said longitudinal shaftsffor effecting rotation of the latter in either of opposite directions-thereby to effect drive of said kerf Ycutter swinging and base propelling means in either of opposite directions.

6,0. In a mining apparatus, a support, a kerf cutter pivotally mounted on said support, and motor operated means for swinging said kerf cutter about its pivot comprising a power driven screw shaft extending longitudinally of said support at one side thereof, a guideway on said suplport at the inner side of said screw shaft and extending coextensively with the latter, a nut threadedly engaged with said screw shaft and slidably guided Ain said guideway, an arm rigid Awith said kerf cutter and arranged on said support at the same side thereof as said screw shaft, and a link pivotally connected to said nut and arm.

MORRIS P. HOLMES.

CERTlFlCATE 0F CORRECTION.

Patent No. ,979,265. November 6, 1934.

MGRRES P. HCLMES.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correcties as follows: Page 3, line 7l, for "gears" read clutch members; and line 72, for "members" read member; and that the said Leters Patent shouid ne reati with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 12th day 0f February, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents.