US1247419A

US1247419A - Mining-machine.

Info

Publication number: US1247419A
Application number: US54533710A
Authority: US
Inventors: Nils D Levin
Original assignee: Jeffrey Manufacturing Co
Current assignee: Jeffrey Manufacturing Co
Priority date: 1910-02-23
Filing date: 1910-02-23
Publication date: 1917-11-20
Anticipated expiration: 1934-11-20

Description

N. D. LEVIN.

MINING MACHINE.

APPLICATION FILED FEB- 23.19). 1 ,fiQYAl Q, Patented. Nov, 20, 191?.

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- Patented Nov. 20, 1917.

4 SHEETS-SHEET 2- N. D. LEVIN.

MINING MACHINE.

APPLICATION FILED rmza, mo.

lfiwfimv Patentefi Nov, 20, 1917.

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Wis/"(451 125 I ,AWWY mm ww Patentw N. D. LEVIN.

' MINING MACHINE.

APPLICATION FILED FEB. 2

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nnrtrnn NILE 3D. LEVIN, F COLUMBUS, OHIO, ASSIGNOB, TO THE JEFFREY lllIAllETFAfililU "1") ii. lie. a l

deli: i

- COMPANY, A CORPORATION 0F OHM MINIHG-D/IAGHINE.

Specification of Letters Patent.

Patented Nov. 23%., lttbll '17.

Application filed February 23, 1910. 7 Serial No. 545,337.

To all whom it may concern:

Be it known that 1, Sins D. LEVIN, a citizen of the United States. residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Mining-Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

The invention relates to machines adapted to cut a kerf in the coal preparatory to blasting or otherwise breaking the coal from the solid. One object of the invention is the provision of a machine comprising a wheel and be laterally braced by a. traclt extendlng longitudinally toward a vertical-coal face and a cutter mechanism movably sup-,

ported on the base frame and adapted, while unloaded -from a transporting truck prior to the cutting-operation and again loaded upon the truck after such operation. Other objects of the invention relate to the provision of a machine of the character referred to having its cutting nie'chanisin mountedin a novel way n relation to the base frame and provided with means whereby it can i be adjusted. operated and controlled in a novel manner. Theforegoing objects, and others more or less incidental thereto, will be understood from thet'ollowing description and claims.

I have shown in the accompanying drawings a machine embodying my invention, but I do not desire to be limited to the construction shown as there are many changes which may obviously be made.

Referring to the drawings, Figure l is a side elevation of the machine embodying my invention.

Fig. 2 is a plan view. Fig. 3 is a fragmentary cross sectional view taken along the line 33 of Fig; 2.

mounted base frame adapted to run upon so supported, to be moved laterally to cutv I U taming chps tor the turntable.

l 1g. 8. a tragmentary plan view with some of the parts of the machine reniored to show the details of-the feed mechanism.

9 is a fragmentary cross sectional. view showing the details of the mounting for the turntable locking latch k Figs. 10 and 11 are diagrammatic views showing one way in which the machine can be opera-ted. In these views the machine is shown as cuttings room or any entry.

Figs. 12 and 13 are diagrammatic views showing other waysin which the machine can be operated. In these views the machine lSSllOTWD as cutting according to the long wall system. I

Figs. 14; to 18 'are diagrannnz'ltic views showing still another way in which the machine can be operated. In these views the machine is shown as operating in another way to cut a room or entry.

The machine illustrated in the drawings comprises a wheeled base frame or truck A, a cutting mechanism B of the endless chain type and an intermediate frame C. The cutting mechanism is supported on the frame C so as to swing laterally while cutting and the :trame C is itselr vertically, and

preferably angularly, adjustably supported on the truclnso that keri s can be cut at rious heights and inclinations.

Power means are provided for rotating the wheels of the truck and preferably the power means consists oi a train of power transmitting devices adapted to be connect- -ed with a driving motor. In the construction shown these devices are connected. with the motor which is carried by and which drives the cutting mechanism, a part of the train of devices being carried by the cutr ting mechanism and a part directly by the truck. The two sets can be connected when the cutting mechanism and the motor are properly adjusted with respect to the truck. These parts will be againreiferred.t heloiv and-described in detail.

ll ii The truck A. com rises the ri id latform l g l "or base frame 2, which mounted. upon the

track Wheels

3, 3 rigidly secured to the axles 4, 4. The Wheels are thus fixed relatively vided at-the rear end oi? the truck. 6 is a cable reel, Which may be of any usual or pre with the gear 0.

' one integral piece.

ill

ferred construction. Upon the reel 6 there is WOLll'lCl a suitable electric cable"? adapted to have its conductors suitably connected at its free end with a suitable source of current supply, such as the conductors in the entry of a mine. With this cable are made electrical connections to the motor to be hereinafter described. 0

Those of the above mentioned power transmitting devices for rotating the truck Wheels which are mounted. on the truck itsell will now be described, it being, of course, understood that as concerns the details of these devices there can be variation. To one of the axles, as for instance 4:, there is secured a driving gear 5. Adjacent the gear 5 and rotatably mounted on the axle is a bracket 8, which has two parallel arms 8- and 8*. At the ends of the arms are provided hearings in which is rotatably mounted the jack shaft 9. This jack shaft 90erries at one end a pinion l0 which meshes llear the 'other end he tween'the bearings. on the arms 8* and 8" there is mounted a sprocket Wheel 11.

A gear segment 11 which. isconcentric With the axle 4 is secured to one of the arms as, for instance, 8 As shown in the drawings, the parts 8, 8 and 11 comprising the bracket 8 may be formed ,as The segment 11- is provided With Worm teeth which are adapted to mesh with the Worm 12. The worm 12 is secured to the rotatable shaft 13 which is mounted in suitable bearings and which extends to the rear end of the truck and carries the hand wheel 1s. v

"it will be noted that the power applied to the sprocket Wheel 11 will be transmitted till through the shaft 9 and the gears 10 and 5 to the axle i. The position of the sprocket wheel 11 maybe changed Without affecting the operation of this power transmitting gearing. This may be done by a rotation f the hand wheel is which acts through the shaft 13, the worm l2 and the Worm segment 11 to turn the bracket 8 about the axle. The Worm and Wheel gearing makes the device self-locking; as any force applied to the gearing or the sprocket wheel will not move the worm to permit a change of position of. the bracket 8.

The devices for supporting and adjusting the cutting mechanism ceinprise, in addition to the intermediate frame C, vertical studs or uprights which are mounted on the truckframe and arranged to define a polynear -tie gon in horizontal ,plan. The studs are fix.- edly held in their upright positions. As shown, there are three studs 15, 15, 15 arranged to define an equilateral triangle. Preferably one or these is mounted in the center of the machine at the front end, the others being symmetrically located near the rear end. Each of the studs is threaded and is provided with two

nuts

16 and 17, which have beveled surfaces and which are provided with radial apertures for the insertion of a. bar or spanner Wrench for turning.

The intermediate frame C as here shown comprises a circular ring 18 preferably rectangular in cross section. as shown in Fig. 3. Equally spaced about this ring are three de pending brackets I 1'9 which comprise two parallel side bars .20, 20 and a horizontal yoke 21 at the bottom of the said bars and having an aperture adapted to receive one of the studs 15.

0n each stud below the yoke 21 is located a nut 17. On each stud above the. yoke is located a nut 16. The apertures in the yoke 21 are sufficiently large to permit a certain amount of lateral movement of the yokes relative to the studs. It will be seen that by a proper adjustment or the nuts 17 the brackets 19 with the ring 18 may be raised or lowered or adjusted to any desired angle relative to the truck. The'nuts 16 serve as lock nuts to hold the brackets in their adjusted positions and to frictionally lock the nuts 17 by pressure transmitted through the yoke 21.

When the. parts are assembled as described the rigid frame C serves to tie the vertical supporting studs 15 together so that they mutually brace each other. This action of the frame C is especially advantageous when 5 it is adjusted Well toward the top of the studs as it insures a strong, rigid frame structure. As concerns the cutting mechanism B it is essential that it be movably 1 ounted relatively to the base frame so tint it can cut 119 a horizontally extending kerf across the front of the truck. in the construction illustrated the cutting mechanism is movable horizontally with respect to the intermediate or supporting frame C and com- 115 prises a rotatable table or frame22 upon which the various operative parts are supported. This frame rests directly on the top of the ring 18 and is adapted to rotate relative thereto. A series of rollers 23 arerotatably mounted on the under" side of the frame 22 and are adapted to engage the inner surface of'the ring to guide the frame 22 in its rotation. A series of brackets or clips 24 are provided which are attached to the under side. of the frame 22 and engage the under side of the ring 18 to prevent the frame from moving upward relative to the ring. 1

As will be fully explained below, the cut- 18'') near/" ie ting mechanism can be used either when moving relatively to the truck or when it is locked thereto and the Whole machine is moved bodily. In order that the cutting mechanism may be locked in various angular positions to the intermediate frame, the outer edge of the frame 22 is provided with a series of notches 25. A hearing 26 is secured to the ring 18 and in this bearing there is slidably mounted a latch 27 which,

' in its upper position, will engage one of the chine bodil {as will be more full 7 ex )lained 3/ .3

below) and for rotating the truck wheels to transport the machine. As concerns the construction and arrangement of the electric motive mechanism there can be modification, but as shown, there is an electric motor 31 carried by the truck and bodily movable therewith. Preferably it is suspended from the table 22. 3l -is a controller for the motor and is preferably mounted on the motor frame. Suitz'dde electrical connections are provided for the controller and motor. As shown. the connections comprise a cable 7 extending from the cable reel 6 to the controller 31. and a cable 7 extending from the controller to the motor, said cables haw ing conductors suitably connected at their" respective ends to the terminals of the cable reel, controller and motor to form an. operative electrical connection between the conductors of cable 7 and the motor 31. I have not. shown these electrical connections in detail because any of the well known arrangements of conductors, fuses, switches, etc, which is suitable for the purpose indicated, can be used. The motor is provided with the shaft 32 carrying the driving pinion 33. The pinion 33 meshes with the gear 35*. which is rotatably mounted on the shaft 353. shown in Fig. 5 the gear 3% is connected to a quill 'or sleeve as. to the outer end of which is connected a sprocket wheel 37. The gear 3%, With'the sleeve 36 and the .-.-.'r0-.l0'- wheel 37, is rotatable on the shaft in and may beseeuredto it by means of the pins 38 which may be moved readily in ward or outward in the slots 39 to engage or disengage the notches 40 in the flange 41 which isconncctcd to the shaft 35.-

ltcferiing now to the cutter devices. id is an endless cuttencarrying chain s 'iilably supported and guided for movement around the periphery of a relatively narrow,- eloh gated cutter arm 47 which is rigidly secured to and projects horizontally from the frame or table 22, preferably in an elevated posi tion, as shown, the table 22" and arm J thus constituting a laterally 1n ovablc cutter frame. For driving the chain it; there is provided a sprocket wheel 4-5 mounted at the upperend of a vertical shaft 42 which is mounted in a suitable bearing on the frame 22*. This shaft is located directly above the shaft 35, but both shafts are preferably located at one-side of the center of the frame 22. The shaft 42 is provided at its lower end with a bevel gear l3 which meshes with a bevel pinion 44 on the shaft As concerns the power actuated mechanism for moving the cutting mechanism relatively to the base or truck frame and for moving the entire machine bodily, there can be variation. but I prefer the mechanism shown,' which comprises a suitable cable adapted to be wound upon a drum which. is driven by the aforesaid motor 31.

-18 represents as a whole the windiin; drum. it) is a vertical shaft for the drum and is rotatably mounted in a suitable bearing on the frame 22. represents the drum proper which is mounted to be capable of rotation independently of the shaft a9, but which may be connected thereto by means of the clutch mechanism 51. This clutch mechanism comprises the driving member 52 which is keyed to the shaft it and disks 53, which are secured alternately to thedriving member 52 and the drum member 50. By means of the hand wheel '54, which engages the upper threaded part ofthc shaft as, the disks may be forced to gcther to friclionally engage each other, power being thus transmitted through the driving member 52 to the drum 50.

A cable 55 is connected to the drum 50 and .isadapted to be wound upon it. The cable, passes from the drum 50 over a series of sheaves 6]., 60, 59, 58, 57 and 5(3. After passing over the last guide sheave the cable can have its end suitably secured at any desired point outside of the machine so as to move the machine bodily, when the cutting mechanism is locked against relative movement. Such an arrangement shown in Figs. l3, 14, 17 and 18. If it is desired to swing the cutting mechanism relative to the truck frame, the end of the cable may be secured to one of the cable holders (52 which are attached to the ring 18, preferably above the brackets 19, such an arrangement being exemplified in Figs. 10, 11, l2, l5 and 16. These figures, and also Figs. 13, ll. 17 and 13, will hereinafter be explained more fully. I have'deseribcd the cable 55 as passing over all of the sheaves. will. be understoml, however, that this is not necessary and depends entirely on the position of the table'relativeto the point of at lili due to the re-action of the worm til and the wheel 67 is a ratchet wheel mounted on the shaft midway between its bearings and on the center line ofjihe machine. On each side of the ratchet wheel 67 is located a bracket 68 which is rotatable about the Between the two brackets 8- shaft 65. I there is mounted a pawl 69 which is adapted to engage the ratchet wheel 67. The spring 70 engages atone end with the pawl and at the other end with a pin 71 which extends between the brackets 68. This spring tends to hold the pawl 69 in operative engagement with the ratchet wheel 67. a

An eccentric 42 is mounted on the shaft l2 and carries a strap 42". The strap 42 is connected by means of 'a horizontal pivot 42 to a connecting rod 68 A yoke 68 is connected to the connecting rod by means of a vertical pivot 68 and to the arms 68 by means of a horizontal pivot 68. By means of this construction the arms 68 are rocked backward and forward about the shaft 65 as the eccentric is rotated, th pawl 69 being thus given a reciprocatory movement whereby it may engage the ratchet wheel 67 to intermittently rotate it. The horizontal pivots 42 and 68 permit the vertical movement of the rod 68 which is in cidental to the swinging of the arm 68. The vertical pivot 68 permits the rod 68 to move laterally with the eccentric stra 42 each side ct the ratchet wheel 6 and preferably outside of the brackets 68 are two arms 72, each rotatably mounted at one end on the shaft 65. The outer ends of these arms are connected by a pivotally mounted "yoke 73, which has a threaded aperture through which passes the thread ed adjusting'rod 74; Hand wheels 75 and 76 are provided at the upper and lower ends oi this rod. The rod passes loosely through a suitable aperture in the frame,

"22 and collars 77 are secured to the rod at each side of the frame and serve to prevent movement of the rod through the aperture. An arcuate finger 78 is rigidly attached to fill the arms 72 and is concentric with the shaft (iii mac ete The sprocket wheel 37 and the chain. 79'

serve to complete the before-mentioned train of power transmitting devices between the motor and the truck wheels.

The operation of the machine is as fol lows: When it is desired to move the ma chine from place to place about a mine or elsewhere the table 22 is swung to the position shown in the drawings and the chain 79 is put in place on the sprockets 37 and a; 11. In order that but one length oflchain need be provided for various vertical adjustments of the machine, the mechanism shown in Figs. 1 and 6 has been provided. As has been previously described, the sprocket wheel 11 may be swung'about the axle 4 by rotation of the hand wheel 14:. As it swings about the axle its distance from the sprocket wheel 37 is changed, and by a proper adjustment its position may be accommodated to any vertical position ot,

the sprocket Wheel 37. 'Ilnls adjusting mechanism also furnishes a means for tea sioning the chain '79 and makes it possible for the chain to be readily placed on the sprocket wheels and afterward tightened. When the machine is to be driven by means of this mechanism, the shaft 35 is-discngaged from the motor by moving the pins 38 out of thenotchbh 40' in the flange 4'1 and locking them at the outer ends of the slots 39. Power is then transmitted from the motor through the gears 33 and 34c and the sleeve 36 to the sprocket wheel 37 and from this sprocket wheel to the axle 4 and the wheels 3 by means of the mechanism which-has been previously described.

When the machine is in position for-making a cut in the coal the chain 79 is removed and the table 22 is adjusted to the proper elevation and the proper angle by means of the nuts 16 and 17 on the studs 15. The shaft 35 i connected to the motor by means of the pins 38 and power is thus transmitted from the motor through a the gears 33 tothe .shafti42 and the sprocket wheel 45 whichdrives the cutter chain 46.

The feed cable' 55 is placed in position on the feed. drum 50 and the various sheaves in the manner which has been previously described. The end of the cablc'may be fastened to one of the cable holders 62 or it may be anchored in a convenient manner and 34, the shaft 35, the gears 43 and 44 V Iii;

' ward on the ratchet wheel.

at a point external to the machine, accord the worm 6 3:, the shaft 65 and the ratchet wheel 6? by means of the pawl (59 which is operated by the eccentric 4 The worm and wheel mechanism acts as a self-locking device to prevent the reverse movement of the drum when the ipawl is moving hack- .ls the drum is rotated, the cable 55 iswound upon it and the table 22 is slowly rotated upon its supporting frame, the moving cutter chain being thus forced through the coal. The operation of the machine is not confined to a rotation of the table and cutting mocha-- nism relative to the supporting frame. The table 22 may be locked by means of the latch 27 in any desired position, as for instance with the cutter frame 4-7 at right angles to the track, as in 13, or at an inclination to the track, asin Figs. 14,17

and 18, With the parts in such a position, the cable 55 may be attached to a point esternal to the machine and the whole new chine drawn along the track, the cutter chain being forced through the coal by means of the winding of the cable on the drum.

It will he noted that the friction clutch 51, by means of which the drum is connected to its rotatlng mechanism, "furnishes a safety device adapted to prevent too rapid till -responding to say sin notches.

feeding of the cutting mechanism through the coal. The friction clutch may he set by means of the hand wheel 54 to yield at a desired resistance, and in this way it is impossiole for force beyond a certain predetermined amount to be transmitted to the cutters. I

lhe rateof feed may be adjusted by means of either of the hand Wheels 75 and 76 which control the linger 78. As has been prcvioiisly stated, the finger is adapted to engage the pawl 69 to hold it out oif en-- gag-omelet with the ratchet wheel 67 during a past oi movement, The finger "l8 3 av he swung so for backward as to not inteo tone at all with the pawl 69, in which case the pawl at each reciprocation would rotate the ratchet wheel 67 through an angle cor- When the finger 8 is swung forward a certain amount it will engage'the pawl 69 during the fii'st part of its operative stroke and hold ,it out oi engagenientwith the ratchet wheel until a certain numhei' oi notches, which may he varied, say from one to five, have been passed. in this way, by simply turning one of the handwhecls 75 or To the rate ot feed the machine may varied through Prior to my invention, it has been customary to cut kerfs in coal faces at or near the bottom thereof. In many mines, however, conditions are encountered which make it preferable to cut the kerif at on near the top of the seam, or at some pointhetween the top and the bottom. This is especially the case in mines where there are present in the coal scam hands or layers of impurities which must not be mixed with the coal. These layers are, of course, at difl'erent heights in different mines, and oven vary markedly in height from place to place in the same mine. in fact, even in a given room the layer or hand oi dirt may be inclined so as to be much higher at one side than at the other. When such dirt bands are encountered, a machine embodying my invention can he used to cut them out; that is, the cutting mechanism is adjusted vertically, and angularly, it necessary, so that will follow the dirt hand and remove it, thus performing; the double function of getting rid of the dirt and forming' a kerf to permit shooting of the coal.

In order that the manner of utilizing my invention may he clearly understood, l have indicated in the diagrammatic Figs. to 18 of the drawings several oi the ways in which my machine can he used, and these ll will now briefly describe.

Referring first to Figs. 10 and 11, it will he observed that the machine is here shown as operating on a track which extends along" the center of a room to the face which is to be cut. From the mine entry the machine advances under its own power into the room and is brought to a position as close as convenientto the face of the coal. The cutting mechanism having been extended toward the right, as shown in Fig. 10, the cable is passed around the several sheaves and secured to one of the holders 62 as shown. The cutting mechanism isthen set in motion and the cable is Wound so as to swing the cutting mechanism from right to left to cause it to cut a semicircular kerif extending from one side of the room to the other. in Fig. ll theheri' is shown half out and thedotted lines indicate the positionof the cutte after the completion of the cut.

it will he undei'stood that the cutter mechanism can he adjusted as desircdeither ver-- tically or angularly at the beginning of the cutting, or at any time during its progress, to follow inclinations and irregularities in the dirt hand. which is being cut, or to ei'fect such Variations in the kerf as may he desired for other reasons.

-0rdinarily, as soon as the kerf has been completed, the machine ismoved from the room under its own power, in the manner previously described, and thence through the mine entry to another room where the operation s repeated. lhus, during a working )lil tit room faces will be cut preparatory to the 7 breaking down of the coal.

In Fig. 12 the machine is shown working on a track parallel with the coal face-t0 be cut. ln starting the operation the feed cable is passed around several of the sheaves and connected to one of the holders 62. Then motion causing the cutter bar to swing from right to left, or counter-clockwise, from the position shown in dotted lines, to that shown in full lines. When this full line position is reached the feed is stopped and the cable is loosened, taken off from the holder 62'and extended along the face to a suitable jack in the manner indicated in Fig. 13. The cutting mechanism is then locked against swinging and the winding drum again start-- ed. The draft of the cable now serves todraw the entire machine along the track, the cutters meantime forming the kerf.

In Fig. 13 the operation is similar to that described in connection with Fig. 12, the former figure being designed to show the manner in which the machine can be used to start a kert adjacent a side Wall or rib. The dotted lines indicate the position oi the machine after the cutter has been swung under the coal and the cable carried along the face to a jack. The full lines indicate the position of the machine after the cutting operation has progressed some distance. It will be understood that when the machine is worked in the ways indicated-in Figs. 12 and 13, the cutter mechanism can be adjusted vertically and angularly in the manner previously described.

Referring to the operation as shown in Figs. 14 to 18, it will be observed t .at here again the machine is shown as operating on a track which extends along the center of a .room. In starting the out the cutter arm is positioned as shown in Fig. Ltd and is located in place relatively to the trhck. The cable 55 is carried from the stem 50 over some of the guide sheaves and "extended forward to a suitable anchor or jack. as indicated at 81. be cutting mechanism is then started, and by means of the cable the entire machine is drawn. forward to the position indicated in Fig. 15. Then the cutting mechanism is 'un-- locked so as to be free to swing and the cable '55 is carried around the sheaves and secured to one of the holders 62. as indicated in Fig. 15. Winding of the cable is then resumed and the cutting mechanism is forced to swing toward the left through the position indicated in Fig. 16 and to the position indi cated in Fig. 17. Then the winding 0% the cable is stopped, the cable is removed from the holder 62 and'is carried back to a suitable anchor at 82. The cutting mechanism is locked in position on the truck and tie -cable is wound to draw the entire machine back to the position indicated in Fig. 18', the out being then complete. I It will be understood, of course, that the methods of operating the machine indicated in Figs. 10 and 11, and let to 18, are applicable to the driving of entries. as Well as to" room and pillar cutting which has been rethe cutters and the Wmdmgdr-um are set an? ferred to in the foregoing description.

From theforegoing description it will be seen that the machine is adapted torthe cutting of a. kert' which extends across one end of the machine from a longitudinal verti'cal plane at one side of the track to a longitudinal vertical plane at the other side of the track, and, furthermore, that it is well adapted for the cutting of a kerl": having two end walls parallel to each other and to the central track and having a third connecting wall which extends transversely across the central vertical plane of the machine from one to the other of the two end walls. For the cutting of a lrerfsuch as last re-. ferred to, I prefer a construction such as illustrated in which the cutter apparatus is mounted on the base frame to swing about a relatively fixed axis. but it will be understood that so tar as many of the features ingeapacity to the fact that the machine is adapted to form a kerf from side to side of the room while it, as an entirety. stands on the track over which it approaches and leaves the working face, together with the fact that the power mechanism ol'tlie 1na chine, in connection "ith the electric cable and reel devices affords means adapted to drive the track wheels to transportthe machine over the mine tracks in. roomfltc room. Under its own power reached, no time is consumed, as in the case 1 of other types of machines, in unloading the "Milli lltl ie machine .moves over the mine tracks at an ample speed and, when the face oi? the coal is anism proper in so far as some features of my invention are concerned, it is essential.

when the machine is to be operated in the manner last referred to above. that a cutter mechanism, substantially such as have shown and described, be provided. in order to attain a working capacity. such as is atlit eke

Eiii

narrate tained, it is necessary that the machine be capable of cuttmg by the swinging movement of the cutters, a face of considerable length measured from pillar to pillar. linother words, the cutter mechanism must have a wide reach beyond the base frame-or I find it possible to attaina radial reach for tl cutters which would be quite impossible with other forms of cutter mechanism, such, for example, as disk or Wheel cutters which are limited in practice to rela-. tively small diameters, and rotary bar cutters in which the entire force of the reaction of the coal on the cutters must be transmitted through the bearing in which the bar is track rails without being materially strained or racked. This requirement can be met with different forms of frame structure but,

when the cutter frame is to be vertically adjusted through a relatively wide range, I prefer a structure of the character shown having a rigid base disposed relatively close to the ground and carrying upwardly extending supports forthe cutting mechanism.

In the construction shown and described the upright supports 15 are rigidly and fixedly mounted on the truck frame and the cutting apparatus is both vertically adjustable and laterally movable in relation to said supports; but my invention, in its broader aspects, is. not to be understood as limited to such a. relation of the parts, for it is obvious that provision for the lateral swinging movement of cutting apparatus vertically adjustably mounted on upright supports, can be made in other ways. Uhvious y, the vertical adjustment on the up right supports can be effected by other means thaifuscreiv threads and nuts, though that is the means which I prefer.

*l' have shown the cutter mechanism as l0- catcd near the uppermost plane of the machine. and this is tli'epreferred construction, as it is there that the dirt bands referred to are most. frequently found; but it will be understood that the invention is not limited in this respect, and may be modified to meet the conditions for which it is intended to he used: Another reason Why the location of to form a li'erf in relatively high hor the cutting mechanism shown is the pre ferred oneis that in many cases it is found. preferable to cut the kerf near the roof in. stead of near the floor, and to shoot the coal up instead of down, as was customary prior to my invention. It hasheen. found that when the coal is shot up it is left in larger pieces and therefore is more suitable for use; and it has. furthermore. been found that there is less tendency to shatter the roof when the coal is shot up than when it is shot down. I

The motor is preferably mounted. a; shown, to be movable with the cut ng apparatus, but. it will be understood tl as to this there can be no variation concerns certain features of the invention.

. The mechanism which I hall rm'ide'd moving the cutter mechanism hoii'onialig; has many features of advantage. The mechanism is frictionally driven, and the tioual devices act to limit the an'ur-unt of force which can be transmitted. the cat ters strike a hard place the friction devices. will slip and prevent breakage. The feed is variable in rate so that it can be adjusted in accordance with the character of the ma terial and the depth of the cut. l urtl rr more, the rate of feed is adiustahle. u i the cutting mechanism is in operation, this being especially important in machine of this class in Which. during a euro ,ing scmi-- circular cut, as indicated in Fi es. 10 and the cut is rclativelyshallow at the beggini and at the end and relatively deep at the 1 center. l have provided means whereby the rate of feed can he made relatively rapid at the ends ofthe cut and relatively slow at. the center Without stopping; the action of c cutting mechanism. The provision of a rope for effecting the' feeding is advantagcrms. it enables the connection to the'basc frame to be made quickly and convenient at any one of several points; and as it, furthermore, makes'possible the use of the same tending mechanism either for turning the cutter arm on the base frame or for moving; the whole machine bodily along}; the tra clip l do not herein claim as a part of my pres ent invention a wheel supported base iii-aim or truck, cutting apparatus movahly human ed thereon, a rotatable reel and a cable the on for su iplying electric current to the chine, as such subject-innit. r c my co-pending apg ilication ir mining u chines and trucks, Serial No. 'l'tljl'lh'i, til August 31, 1910., upon which 1,137,337 was granted April 2?, ti le.

I do not herein specifically claim a minis machine having cuttings apparatus ad Lt iii cut i lanes and a licrf inrclativelv lo'u' hor soun tal planes arranged so that said. (.l

paratus cannot form horiaoul'al claim cutting apparatus form a horizontal kerf in relatively higher horizontal planes'and then swing the axis of said carrier to a position which can form a horizontal kerf in relatively lower horizontal planes.

' What I claim. is:-, i

1. In a mining machine, the combination of a wheel-supported rigid base frame adapted to run upon and be braced by the rails'of a mine track,'a laterally movable endless chain cutter apparatus carried by the base frame and promoting horizontally therefrom, supporting'means between the cutter apparatus and the base frame comprising a plurality of upright supports extending upward from the base frame and held in upright positions at the angles of a relatively widely extended horizontal-polygon and connections between each 01 the upright supports and the cutter'apparatus for sustaining said apparatus and adjusting it-vertically in relation to the base frame, motor devices carried by the base frame, and driving connections whereby the power of said motor devices is caused to drive the cutter apparatus and move it laterally, thereby forming an elongated horizontally extended kerf. v

2. In a mining machine, the combination of a Wheel -supported rigid base frame adapted to run upon and be braced by the rails of a mine track, aplurality of upright supports mounted directly on the base frame and extending upward therefrom at the angles of a relatively widely extended horizontal polygon, a rigid cutter frame comprising a widely expanded turn table and an elongated cutter arm projecting laterally from said table and from the base frame, means carried by and vertically adjustable on the upright supports forming a bearing support for the turn table, chain mounted on the cutter arm, motor devices carriedby the base frame, and driving connections whereby the power of said motor devices is caused to drive the cutter chain and to move the arm laterally. there-.

iyformiug an elongated horizontally entcnded/lrerf.

3. In a coal cutting machine, the combination of a wheel-supported rigid base frame, three upright threaded studs mounted on the base frame at the angles of a horizontal triangle, a cutter mechanism, a supporting frame upon which the said mechanism is rotatabh. supported, and nuts on the upright studsifoi" sustaining and vertically adjusting the supporting frame and cutter mechanism.

an endless cutter eanne 4. In a coal cutting machine, the combination with a movable base, of three equidistantly disposed vertical threaded studs, a supporting frame comprising three brackets with,apertures which the studs are adapted to enter, nuts adjustable on the studs and adapted to engage the brackets,- a coal cutting mechanismand a supporting table for the said coal cutting mechanism rotatably mounted upon. the supporting frame, substantially as set forth.

5. In a coal cutting machine, the combination with a movable base, of three equidistantly arranged vertical threaded studs, a supporting ring, brackets connected to the ring and having apertures through'which the studs are adapted to pass,-nuts on the studs and adapted to engage the brackets; a coal cutting mechanism and a supporting table for the coal cutting mechanism supported by the said ring and mounted to rotate relatively thereto, substantially as set forth.

6. In a coal cutting machine, the combination with a movable base, of a horizontal supporting ring mounted on the base. means for adjusting the ring vertically and angularly with respect to the base, a coal cutting mechanism, a supporting table for the coal cutting mechanism arranged to rest directly upon the upper surface of the ring to be rotatably supported thereby, and a plurality of devices secured to the supporting table at points within the outline of the ringto engage the inner surface of the ring and prevent horizontal movement of the tablewith respect thereto, substantially as set forth.

7. In a coal cutting mechanism, the combination with a movable base, of a horizontal supporting ring mounted on the base, means for adjusting the ring vertically and angularly with respect to the base. a coal cutting mechanism, a supporting tablefor the coal to rest directly cutting mechanism arranged the ring to be upon the upper surface of rotatably supported thereby, a plurality of devices secured to the supporting table at of the ring to en ring and pre the table with points within the outline gage the inner surface of vent horizontal movement respect thereto, and a plurality of'clips con nected tothe table and provided with parts its use

- around the said idler sheaves, and a plurality of circlunferentially spaced devices mounted on thebase frame and held against turning with the cutter apparatus, each adapted for the attachment of the cable to cause the cutter apparatus to turn when the cable is wound.

17. In a coal cutting machine, the combination of a wheel-supported truck, a cut-.

ter apparatus mounted on and extending forward from the truck and adapted to swing horizontally across the front end thereof while cutting, a powerdrivenreel movable horizontally with the cutting apparatus, a cable connected to the reel, and a plurality of guide sheaves for the cable mounted on the machine and adapted to give the cable fair lead in various directions in relation to the reel.

18. in a coal cutting machine, the combination of a linearly movable base, a cutter framemounted on the'bas e for movement about a vertical axis, and having an elongated cutter arm extending horizontally from the base in planes near the top of the l frame, an endless cutter chain on the arm,

a motor on the frame below the planes of the cutter arm, gearing for transmitting the power of the motor to drive the cutter chain, a winding drum on the frame, gearing for 1 transmitting the power of the motor to drive the drum, a cable connected at one end to the drum to be wound thereon and adapted to be connected at the other end to a point external tothe machine, cable guide pulleys on the frame in planes below the planes of the cutter arm, the pulleys being at points remote from the axis of rotation of the frame whereby the cable tends, when the Q drum is rotated, to turn the frame and the cutter arm about the said axis, and a manu- I ally controllable lock for holding the frame and cutter arm against rotation with re speet to. the base, whereby the cable tends, when the lock is in operative position and when the drum is rotated, to linearly mm e the machine as a whole.

19. In. a wheelsupported coal mining machine adapted to be transported over mine i'tracksiand to cut a horizontal kerf while straijported on a track extending longitudign u 7 toward the face of the coal, the comhin'ation of a base frame, track wheels supporting said 'rrame, cutter apparatus supported by and projecting horizontally from the base frame, said cutter apparatus being movable laterally in relation to the base frame while Supported thereby to cut a kerf extending transversely across the track on which the machine stands, devices for driv-- ing the cutter apparatus, for moving said apparatuslaterally, and for rotating the track wheels to transport the machine from one working place to another, motor de-- WICOS carried by the base frame for actuatmg the aforesaid devices, and means connected with the machine adapted to afford a supply of motive power to the motor devices when tlledflflClllIlO is being transported over a mine track and when it is in operation thereon at the face of the coal.

20. In a wheel supported coal mining machine adapted to be transported over mine tracks and to cut 'a'horizontal lrerf while supported on a track extending longitudi nally toward the face of the coal, the combination of a base frame, track wheels supporting said base frame, cutter apparatussupported by andprojecting horizontally from transport the machine from one working lace to another, motor devices for actuatmg the aforesaid devices, and means for supplymg motive power to said motor devices comprislng a flexible conductonfor the power medium, said flexible conductor I beingconnected atone end to the. machine and con'nec'tible at its other end to a source of power. f

21. I n a wheel supported coalinining machine adapted to be transported over mine tracks and to cut a horizontal kerf while Supported on a track extending longitudinally toward the face of the coal, the combination of a base frame, track wheels sup porting said base frame, cutter apparatus supported by and projecting horizontally from said base frame, said cutter apparatus being movable laterally in relation to the base frame while supported thereby to cut a lrerf extending transversely across the track on which the machinestands, devices for driving the cutter apparatus, for movthe base frame, and for rotating the track wheels to transport'the' machine from one working place to another, electric motor devices for actuating the aforesaid devices,

and means for supplying energizing current to said motor devices comprising a reelconnected to and movable with the machine mg said apparatus laterally in relation to ill till

litilit) of the ba e frame and its rear end extending back over the base frame, supporting.

connections bet ween the rear end of the cutter arm and the ,base frame comprising a driving the c1'1ain, power mechanism con; structed and arranged to move the arm lat-V erally from points at one side of the track to points at the other side thereof, and motor devices carried by the base frame for actuating the said power mechanisms, the said parts being arranged as described whereby there may be formed an elongated horizontally extended kerf across the front v end of the machine."

30. in a system of coal mining apparatus comprising a ground supported track and a portable mechanism adapted to be transported over and remain permanently upon and be braced by said track, and also adapted to cut a lmrizontal kierf in a coal face while supported on a section of track ex-- tending longitudinally toward said face, the eoinbiiuition of a rigid base frame, Wheels secured to said base frame and resting upon and braced by said track section, a narrow elongated cutter arm carried by the base frame and movable horizontally and laterally across the front thereof, its forward end extending horizontally to points outside of and remote from the vertical bounding lines of the base frame and its rear end extending back overthe base frame, supporting connections between the rear end of the cutter arm and the baseframe comprising a horizontally Widely extended rotar brace structure disposed directly above the wheels base of the base frame, a cutter chain mounted to move in a horizontal path around the periphery of the arm, motor devices carried by the base frame, and power devices whereby the power of said motor devices is caused to drive the cutter chain and to move the arm laterally from points at one side of the track to points the other side thereof, thereby forming elongated horizontally extended kerf across the front end of the machine.

31. In a system of coal mining apparatus comprising a ground supported tract and a portable mechanism adapted to be transported over and remain permanently upon the other parts of the apparatus and mmable horizontally and laterally across the front of the base frame, said arm having its forward end extendinghorizontall y to points outside of and remote from the vertical bounding lines of the base fie-tine and rear end extending back over the base supporting connections between the rear end of the cutter arm and the base frame coin- -PI1S1Ilg a horizontally Widely e? attended rotary bracestructure disposed directly above the Wheel base of the base frame, a cutter chain mounted to move in a horizontal path around the periphery of the arm, power mechanism fofdriving the chain, power mechanism constructed and arranged to more the arm laterally from. points at one SltllQOf the track to points at other side thereof, and motor devices ried by the base frame for actuating the saithpouer mechanisms, the said parts beine' arranged as described whereby an elongated horizontally extended kerf' may be formed in the aforesaid elevated planes across the front aontal throughout,- a chain drivins motor positioned below the cutter arm tlllt fixedlyeonuected thereto to move bodily therewith," and power actuated means below the arm-'- for causing it and th cutter cha n to move laterally to out a izontal kerf in the aforesaid elevated "lanes extending tri versely from one side to the other of the track.

33. in a track lnoiu ted mining apparatus adapten to cut a hoi. ntal lzerf extending across its front from no side of the track to the other, the combination of a id l 7, frame, supporting wheels therefm: resting: upon and braced by the track, a laterally movable rigid cuter carried bythe base frame and extending therefrom in elevated normally horizontal planes above the other parts of the apparatus, an endless cutter chain movable along the cutter arn its;

lit

in a

with normalv horizontal throu hout de-I vices below the said arm for adjusting the arm an n'ularly to cause the euttin; planes to be inclined or vertically in parallelism to move the cutter chain from one set of rela tively elevated cutting planes to another set i of more elevated cutting planes, a chain driving motor positioned below the cutter arm and fixedly connected thereto to 11love bodily therewith, and power a. tuated means below the arm. for causing it and the chain more laterally tocut a horizontal or an inclined, lierl at any of several relatively high. elevations and extending transversely trom'one side of the t 'ack to the other.

34:, ln system of coal mining apparatus comprising aground supported track and a portable mechanism adapted to be trans"- ported over and remain permanently upon and be braced by said rack, and also adapt ed to cut a: horizontal lrerf in,'a coal face while supported on a section of track extending longitudinally toward said face, the combination of a rigid base, frame, wheels secured to said base trance and resting upon and braced by said track section, a narrow elongate-"l cutter arm carried by the base i raine movable horizontally and laterally across the'front thereof, its forward end extending horizontally to points outside of and. remote from the vertical bounding lines oil the base frame and its rear end extending bacir over the-base frame, supporting connections between the rear end of the cutter arm and the base frame comprising; a horizontally widely extended rotary brace struc- .ture poi d directly above the wheel base oi base trains and means for adjusting the cutter arm upward and downward, a cutter chain mounted to move in a horizonpat'o. around the periphery of the arm, power mechanism -for driving the chain, power mechanism constructed and arranged to move the arm laterally trom points at one side of the traclr to points at the other side thereof, and motor devices carried by the base i or actuating the said power mechanism, said parts being arranged as described whereby an elongated horizontally extended kerf can be formed at any one of several elevations across the front end or the machine.

3-". system of coal mining apparatus a ground. supported track and portable adapted to be trans- L d and r main permanently ,upon

braced by said track, and also d to'cut a horizontal lreri in a coal supported on aseetion of track Nadine; longitudinally toward said face, combination of a rigid trains, wheels secured to said base tune and rest- A upon and braced by saw, track section, narrow elongated cutter arm carried by J base frame and movable horizontally s. end extending horizontally to outside of and reinote from the vernounding lines of the base frame and end entendinp; back over the base supporting connections between the cutter arm and the base frame comprising a horizontally Widely extlli tended rotary brace structure disposed cliaterally across the front thereof, its

' path around the periphery of the arm, motor rectly above the'wheel base of the base trains and means for adjusting the cutter ariu upward and downward, a cutter chain mounted to move in a horizontal path around the periphery of the arm, motor devices carried by the base frame, and power devices whereby the power of said motor devices is caused to drive the cutter cnaiu and to move the arm laterally from points at one side of the track to points at the other side thereof, thereby forming an elongi'ated horizontally extended kerf across the front end of the machine at any one of z-sm'eral elevations.

36. In a track mounted mining apparatus adapted to cut a horizontal kert extending: across its front from one side of the tract. to the other, the combination of a rigid base frame, supporting wheels therefor resting, upon and braced by the track, a laterally movable cutter arm carried by the base i'rame and extending horizontally therefrom, and endless cutter chain movable along the cutter arm in a horizontal path, a chain driving motor fixedly connected to the cutter arm to move bodily therewith, means for bodily adjusting the arm vertically in parallelism to more the cutter chain 'lroni one set of relatively low cutting; planes to another set of relatively high cutting planes, and power actuated means constructed and. arranged to cause the arm and the chain to move laterally to cut a horizontal lterl. at any one of several elevations and extending transversely from one side to the other 01 the track.

37. In a system of coal mining apparatus comprising a ground supported track and a portable mechanism adapted to be trait ported over and remain permanently upon and be braced by said track, and also adapted to cut a horizontal kerf in a coal face .while supported on a section oftraclr extending' longitudinally toward said face, the combination of a rigid base frame, wheels cured to said base frame and restinp, upon and braced by said track section, a narrow elongated cutter arm carried by the bus frame and movable horizontally and laterally across the front thereof, its "forward end extending horizontally to points outside of and remote from the vertical bounding lines of the base frame and its rear end enter-din back over the base frame, supporting con nections between the rear end oi the cutter l arm and the base frame adapted to. permit the arm to swing laterally and comprising downward, said supportsbeing arranged at the angles of a horizontal polygon directly above the Wheel oi the base trains, a cutter chain mounted to more in a horizontal devices carried by the base fram Hill are,

devices ivhereby the power of said motor dhvices caused to drive the ,cutter chain and to move the arm laterally from points at one side of the track to points at the other side thereof, thereby forming an elongated horizontally extended kerf across the front end of the machine.

in a system of coal mining devices comprising a track extending longitudinally toward the coal face and a'mining mechanism thereon arranged to cut kerfs which ex-.

tend across the central longitudinal vertical plane of the track, the combination of a wheeled truck resting on and braced by the track, three vertically elongated guide supports res iiectively at the angles of a triangle in horizontal plan directly above the truck, a frame vertically adjustably connected to each of said guide supports independently of the others and forming a relatively Widely extended base directly above the truck, and a horizontal kerf cutter supported at its rear end on said vertically adjustable frame and extending; forward to points in front of the truck and adapted to be armed, While cutting,lateral1y across the longitudinal vertical planes of the truck.

In a coal cutting: machine, the combi-,

nation of a rigid base frame, three triangularly arranged upright supporting devices fixedly mounted c the base frame, a supporting frame mounted on the said devices and otherwise freely movable as a unit vertically with respect to the base frame, a cutter apparatus mounted on the supporting frame and sivmgable horizontally relatively thereto, the said apparatuscomprising a motor and a continuously actlngkerf cutting mechanism driven by the motor and extending outward beyond the base frame along normally horizontal lines, and means adaptedin cooperation with the said supporting do Vices to move the cutter supporting frame and the cutter apparatus vertically or angularly with respect to the base frame.

1-0. in a system of coal mining apparatus comp icing a ground su ported track and aportable mechanism a apted to be transported over and remain permanently upon and be braced by said track, and also adapt- V ed to cut a horizontal kerf in a coal face While supported on a section of track extendmg longitudinally toward said face, the

combination of a rigid base frame, Wheels secured to said base frame and resting upon and braced by said track section, a narrow elongated cutter arm carried by the base frame and movable horizontally and laterally across the front thereof, its forward end extending horizontally to points outside of and remote from the vertical boundinglines of thebase frame and its rear end extending.

back over the base frame, supporting connections between the rear end of the cutter arm and the base frame comprising a lion zontally widelyextended rotary brace structurc'disposed directly above the wheel base of the base frame, a cutter chain mounted to move in a horizontal path around the eriphery of the arm, power mechanism or driving the chain, power mechanism constructed and arranged to move the arm laterall from points at one side of the track to points at the other side thereof, thereby forming an elongated horizontally extending kerf across the front end of the machine, motor devices carried by the base frame for actuating the said power mechanisms, and means for angularly adjusting the cutter arm in relation to the base frame to cause the plane of the kerf to be inclined.

l1. In a system of coal mining apparatus comprisinga ground supported track and-a portable mechanism adapted to be transport ed over and remain permanently upon and be braced by said track, and also adapted to cut a horizontal kerf in a coal face While supported on a section of track extending longitudinally tou'ard sa d face, the combination of a rigid base frame, wheels secured to said base'frame and resting upon and braced by said track section, a narrowelongated cutter arm carried by thebase frame and movable horizontally and laterally across the front thereof, its forward end extending horizontally to points outside of and remote from the vertical bounding lines of the base frame and itsrear'end extending back over the base frame, supporting con of the base frame, a cutter chain mounted to move me horizontal path around the lieriphery of the arm, power mechanism for driving the chain, power mechanism constructed and arranged to move the arm laterally from points at one side of. the track to points at the other side thereof, thereby forming an elongated horizontally extend ing kerf across the front end of the machine, motor devices carried bythe base frame for actuating the said power mechanism, and

means for adjusting the cutter arm angle larly, to cause the plane of the kerf to be inclined, or vertically in argllelism to vary the elevation of the kerl i W 4 In a track mounted-mining apparatus across its front from one side of the track to the other, the combination of ii rigid base frame, supporting wheels therefor resting upon and braced by the track, a narrow elongated laterally movable cutter arm can arm angular-1y to cause the cutting planes to adaptedto cut a horizontal kerf extending 120 be inclined or vertically in parallelism to move the cutter chain from one set of relative low cutting: planes 'to another set of relatively highoutting planes, a chain driving motor fixedlyconneeted to the cutter arm to move bodily therewith, and motor actuated means for causing the arm and the chain to move laterally to cut a horizontal keri at any of several elevations or inclinalo tions and extending transversely from one side oi the track to the other. 43. In a coal cutting machine, the combination of a wheel supported rigid. base frame, a supporting frame vertically adto justably mounted on the base frame, a cutter 'lrame on the supporting frame movable with respect to the supporting trams about a normally vertical axis and having a cut-- ter arm extending from the base frame as along normally horizontal lines above the other parts of the machine, an endless cutter chain mounted on the cutter arm, a motor on the cutter frame, gearing "for transomitting the power of the motor to drive the cutter chain, and means for adjusting the supporting frame, together with the cutter i'rame, vertically with respect to the base frame or a'ngularly with respect to the base frame about any one of a plurality o'f horizontal axesat angles to each other.

44. In a coal cutting machine, the combination of a movable base frame, supporting track wheels therefor, a cutter apparatus movable asa unit with respect tothe base frame about anormally vertical axis and comprising a motor and a continuously acting lrerf cutting mechanism driven by the motor and extending outward beyond the base frame along normally horizontal lines 40 near the uppermost plane of the machine, the Said cutter mechanism being movable across one end of the machine about the said vertical axis through an arc extending at each side beyond the vertical plane oi the corresponding track wheels, means for locking the cutter apparatus to the base frame at any of several angles, and continuously operable devices connected with the said motor for turning the cutter apparatus about the said vertical axis while in operation, or

for moving the machine bodily on its Wheels While the cutting apparatus is in operation and locked against turning.

i 45. In a wheel supported coal mining; ma-

chine adapted to be transported over mine tracks and to cut 'a horizontal kerf while supported on a track extending longitudinally toward the face of the coal, the combination of abuse frame, tack Wheels supco poi-line said frame, a frame carried by the base irame and mounted to turn in relation thereto in norn'ially horizontal planes, continuously acting cutter devices carried by the turning frame and adapted when 'tle'said frame turns to cut a horizontal kerf extending; transversely across the tract: on which the machine stands, means for turning; the last named frame, a motor for actuating the turning" means, said motor hein ed to move bodily with the turning, frame, l'll mechanism for rotating the track Wheels transport the machine, and means for operatively connecting; the aforesaid motor to said mechanism when the turning trams in a predetermined position in relation to the base frame.

46. In. a wheel supported coal n chine adapted to be transported over m traclrs and to cut a horizontal herli rvh supported on a track adjacent the face oi t'tll the cool, the combination of track wheels supporting said frame and adapted to maintain it in alinement with. the track, a horizontally extending cutter mechanism carried by the base frame and mounted to move from one operative posi tion to another in relation-to said frame, motor connected to drive the cutter meet nism and mounted to move bodily with mechanism when it is moved as aiforesa (l, feed mechanism driven by the said motor for moving the cutter mechanism in 'tion to the baseframe during; the c in operation, and a separable train'o'li between the motor and the track wheels adapted to permit the motor to move bodily and to transmit the power of the motor to rotate the wheels when the motor is in a n-edetermined position.

47. in a system of coal mining devices of Ilttll the class described, the combination oi a wheeled truck adapted to run upon and be late-rally bracedby a track extending longitudinally toward a vertical coal face, cutter mechanism supported upon and movable horizontally, While cutting, across the front end of the truck, a motor movable with the cutter mechanism, means for vertically ad iusting the motor and the cuttin meehanism in horizontal parallelism and adat'ited to hold it either where it will form a lrerl in'relatively low horizontal planes or Where it will form ttktil'li in other horizontal planes relatively higher than those aforesaid. and power actuated mechanism on the truck for causing the said transverse movement oi the cutter mechanism across the frontend of the truck while in operation.

49. in a system of coal mining; devices comprising); a centrally arranged track and mining); apparatus thereon arranged. to cut kerfs which extend across the central. longi tudinal vertical plane oi the track, the combination of a wheeled truck, a series of up right guide columns on the truck reap i lively situated at the angles of a polygon in a horizontal plan, a cutter frame extending from the central part of said polygon for ward horizontally to points in front of the truck, a cutter chain moving around the said 65 lug mi 1': ing

kcrfs 41d across the central longitudinal icrticel plane oi the truck, the norm binution of n wheeled truck it series of verticuiiy elongated guide supports respectively at the angles of a polygon in horizontal plan directly ubove the truck, e frame connected to en-cl' of said guide supports and verticully in u eble hereon forming e relatively 2o Wid y e tendon. 0355B Within said polygon he truck, and a horizontal kerf cutsupported at its rear end at points on said iua-rticety adjustable frame Within said )ol ron and extendins forward to ")OllxtS in L) c: l

front of thetruck. and adopted lo be moved,

cut ng, trensversely across the longiplanes of the truck.

n system 01" coal mining devices compri mg a centrally arranged truck and 80 a mining apparatus thereon arranged to cut l-xcrfs which extend across the central longitudinal vertical plane of the t reck, the combinatiorrof a wheeled truck, at series or verticelly elongated guide supports respectively at the angles of a polygon in horizontal plan directly above the truck, a frame connected to each of said guide supports and verti Lilly adjustable thereon forming a relatively Widely extended base Within said is polygon above the truck, a horizontal kcrf cutter supported at its rearend at points on sold vertically adjustable frame Within said polygon. and extending forward to points in front of the truck and adapted to be moved WllllB cut-ting, transversely across the longitudinal. planes of the truck; and 2; motor for actuating the cutters movnbly mounted on the said vertically adjustable frame in'fiided relations to the cutting up point-us. r 511 111 a system of coal mining devices comprising a centrally arranged truck and mining apparatus thereon arranged to cut .lEcI'fS which extend across the central long} tudin'al vertical plane of the truck, the cornbinetion of a, wheeled truck, u series of vertically elongated upvverdly eitcnding columns positioned at the angles of a relatively ividcly extended horizontal polygon above the truck, a frame Within the vertical lines of the said polygon adjustzibly supported on each of the said columns, a cutter frame connected it points Within the polygon to the v ticzrlly adjustable f sine and extend- ;n points therein to points in front of the truck, a motor carried by the truck, and power transmitting means whereby the motor can cause the cutter frame to swing, while cutting, transversely across the longitudinal vertical planes of the truck.

" 52. lo a system of coal mining apparatus comp]: ing'n ground supported trncl; and a portable mechanism adapted to be trans ported over and remain permanently upon and be braced by said track, and also adapt ed to cut a horizontal. kerf in a coal face while supported on a section of track ex; tending longitudinally toward said face, the combination of e rigid base frame, Wheels secured to said base frame and resting upon and b 'aced'by said track section, a narrow elongated cutter arm carried by the base frame and movable horizcntelly and laterally across thefront thereof? its forward end extending horizontally to points outside of and remote from the vertical bounding lines of the base frame and its rear end extending back over the base frame, supporting connections between the rear end of the cutter ar and the base frame com risin e horizon tally widely extended rotary brclce structure disposed directly above the Wheel base of the base frunie a cutter chain mounted to move in a, horizontal path around the pe riphery of the urm meuns operable at will for locking the cutter arm against lateral movement, power devices for driving the cutter chuin,- for moving the arm laterally from pointsnt one side of the track to points at the other side thereof, and for moving the cutter arm and chain bodily forward and backward when the inn is locked against lateral movement, and m'otordeviccs carried bythe base frame for actuating the said power devices.

comprising a ground supported tree-i end a portable mechanism adapted to be trans ported over and remain permanently upon and be braced by said track, and also adapted to cut a horizontal kerf in a coal face whi'le supported on a section of track extending longitudinally toward said face, the coinbiimtion of a rigid base frame, .vvheels secured to said base frame and resting upon and braced by said trnck'sec'tion, e narrow elongated cutter arm carried by. the base frame and movable horizontally and later ally across the front thereof, its forward end ext-ending. horizontally to points outside of and remote fronrthe vertical bounding lines of the base frame and its rear end extending back over the base frame, supporting connections between the rear end of thecutter arm and the bgsc frame comprising a horizontally Widely extended rotary, brace structure disposed directly above the Wheel base of the base frame and means "for adjusting the cutter arm vertically, a cutter chain mounted to move in a horizontal path around toward and from the coed face.

In a system of coal mining apparatus