US1662455A

US1662455A - Mining machine

Info

Publication number: US1662455A
Application number: US92154A
Authority: US
Inventors: Davis Kenneth
Original assignee: REMBRANDT PEALE; SANDERS DAVIES W; WILLIAM S WALLACE
Current assignee: REMBRANDT PEALE; SANDERS DAVIES W; W SANDERS DAVIES; WILLIAM S WALLACE
Priority date: 1926-03-04
Filing date: 1926-03-04
Publication date: 1928-03-13
Anticipated expiration: 1945-03-13

Description

March 13, 1928. 1,662,455

K. DAVIS MINING MACHINE Filed March 4 1925 Sheets-Sheet 1 AT RNEY March 13, 1928.

K. DAVIS MINING MACHINE Filed March 4. 1926 6 Sheets-Sheet 2 March 13, 1928. 1,662,455

K. DAVIS MINING MACHINE Filed March 4. 1926 e Sheets-Sheet :s

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MINING MACHINE March 13,1928. K. DAVIS MINING momma iid March 4. 192s 2 'IINVENTOR.

patented Mar. 13, 19.28.

UNITED, STATES means:

PATENT OFFKCE. I

KENNETH DAVIS, OFEBENSBUBG, EENNSYLVANIA, ASSIGNOR TO REMBRAN DT PEALE, OF ST. BENEDICT, PENNSYLVANIA; if. SANDERS DAVIES, OF NEW YORK, N. Y.; AND WILLIAM S. WALLACE, OF PHILADELPHIA, PENNsYLVA'NIA, TRUSTEES.

MINING MACHINE.

Objects and advantages or the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with theinventiou, the same being realized and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and

together with the description, serve to eX- lnc, which 111 addition to having th plain the principles of the invention.

Oi the drawings: i Fig. 1 is a central, vertical, longitudinal section of a mining machine embodying the invention with the cutter bar broken away; Fig. 2 is a full top plan corresponding to Fig. 1, also with the cutte bar broken away; Fig. 3 is a side elevation of the machine shown in the preceding figures, looking at the bottom side thereof in Fig. 2 and also with the cutter bar broken away;

Fig. 4; is a vertical, transverse section, taken on the line H of Figs. 1 and 3, looking in the. direction ofthe arrow;

Fig. 5 is the same transverse, vertical section as Fig. 4, but looking in the opposite direction, as shown by the arrows in Figs. 1 and 3;

Fig. 6 section, with parts in elevation, of a somewhat difierent embodiment of the invention, including a speed reducing gear and clutch connection between the motor and cutter;

Fig. 7 is a fragmentary'top plan corre sponding approximately to the left-hand half of Fig. 6; g V

Fig. 8 is a detail, vertical, transverse section taken substantially on the line 8-8 oi Fig. 7;

is a central, vertical, longitudinal Fig. 9 1s a top plan, with parts omitted. and others. diagrammatically indicated, of the. cutter bar and chain, the machine being indicated in dotted line;

Fig; 10 is a side elevation looking at the adjacent side of Fig. 9-; y

Fig. 11 is a transverse, vertical section taken on the line 1111 oi Fig. 9;

Fig. 12 is a transverse, vertical section taken on the line 1212 of Fig. 9; and

Figs. 13 to 19 are diagrammatic views, illustrating different steps in, and different ways of, operating the machines.

The invention is directed to producing a kerflcutting mining machine, which in cer tam features is especially adapted for use in very low coal seams; with this in view, the entire machine is of a verylow, compact, yet powerful structure, which features render it especially adaptable to, and useful in, thin coal seams. The invention is further directed to producing a kerf-cutting mining features already described, is of very simple structure, having few parts and devoid of excess weight, is eflicient and powerful, and which has means and instrumentalities whereby the machine is readilyhandled and maneuvered by its own power during all stages of the kerlf-cutting work.

Referring now to the embodiment of the invention, illustrated by way of example in the accompanying drawings, the general structure of the motor and its mountings, and the immediately cooperating parts, will be first described. As embodied, a bed or foundation plate 1 is provided, adapted to rest upon the mine floor, and to be moved therealong, the general structure of the mining machine being either integral with or mounted upon the bed plate.- Integral with and extending upwardly from the bed plate 1 (Figs. 15) are pillars 2 and 3,. constituting journals for the hubs of the rotatable housing or the field winding of an induction motor. In the preferred formof my invention, a motor is employed in which both the field and armature rotate, as will be later more fully explained.

As embodied, the housing is provided with a central cylindrical part 10, within which the field windings 11 are mounted. these windings being indicated merely diagrammatically, for the sake of clearness, and they may be of any known or suitable torm. At either side of this central part 10, the housing is of reduced diameter.

On one side this reduced cylindrical portion constitutes a cable-winding drum 12, which drum constitutes part of the mechanism l'or driving or progressing the machine to the work during the kerf-cutting the side face 135 of the central part 10 of the housing forming one ilange of drum l2, and a flange l4: being formed at the exterior flat face of the part 12. A bearing for this end of the entire housing structure is provided. Exteriorly to the drum l2, and integral with, and extending outwardly from, the flat side face thereof, is a hollow, cylindrical hub 16, which journaled to rotate in the bearing upon the pillar 3, a friction sleeve 17 being interposed between the hub and the bearing.

Frictionally acting means to control the rotation of the tield winding housing and the cable winding drum 12 are provided.

As embodied, on the opposite side of the part 10 of the tield winding housing, is a cylindrical part 28 of lesser diameter. and constituting a brake-drum, wl'iereby the fric tional, retarding force may be applied to the h'eld winding housing and cable drum for purposes later to be more fully described. The tlat face 29 of the part 10 for the housing constitutes one flange of the brake drum, and there is a tlange 30 formed on the other side of the cylindrical drum face. Exteriorly to the drum 9,8, the housing extends outwardly in an integral, hollow hub 31, which is journaled in the bearing upon the pillar 2 of the base plate 1 of the machine. A friction sleeve 32- is provided between the hub 31 and its bearing. The hubs l6 and 31 thus constitute concentric bearings for the field winding and its housing, and for the cablewinding drum at: one side thereof, and the brake drum at the other side thereof.

A part of the means for directing and maneuvering the machine is conveniently mounted at this part of the structure, and will therefore be now described. It consists essentially of a loosely rotating cable drum on which is wound a cable having its end anchored, and of a brake-drum for control ling the rotation of the otherwise. freely rotating cable drtun. As embodied, there is mounted on an extension of the hollow hub 31 of the held-winding housing, extending beyond the hearing :2, a combined cable winding and brake drum, the drum being freely rotatable on the hub 31. This drum has a body 38 loosely mounted on the sleeve 32, which also projects outwardly around the hub 31. A retaining device is applied to the end of the hub. comprising a screw-threaded body 39, screwing into an interior thread in the hollow hub 31, having a flanged cap 40 titting over the external end face of the hollow hub #51, and having a squared turning, head ll. on the exterior. This device serves to keep the drum 255 in position, and also to retain a lubricant within the hub.

The drum 538 is provided with an exterior flange it), and an intermediate flange lo, the cattle ti being wound on the drum intermethatch. of these two tianges. The drum is tll provided with a llange 5t, and there is a iiralte band 52 operating upon the cylindrical surlace of this part of the drum 35 bet ween the flanges 1-6 and 51.

Iiieans are provided for varying the torn sion of the brake hand 52, and for maintaining the brake band at any desired adjusted tens on. 415 embodied (ifiigs. l. to 1-), one end of the brake band a: is pivoted at 56 to the inner end ot' a (irked lever at, which lever is pivoted at in) on an extension of the tap plate in; ot the bearing Z. The other end ot' the brake band [)2 is pivoted at 59 to the lever :17. on the opposite side of the pivot point :38 from the other end 50 of the brake band.

'ihe outer end of the lever 57 is apertured to receive a s 'rew thrcatled bolt (it), the bolt tt) also pa sing through an aperture in the horizontal reach 61 of a standard having also vertical reaches (52 and (33, mounted on the bed plate 1 of the machine. The head (i l of the bolt U0 is beneath the horizontal reach (ll of the holding bracket, and a wing nut (35 is screw-thrcaded onto the bolt (30. Thus the tension of the brake band 432 on the drum 3o may be regulated. and the resistance to paying out the cable 4-? may be varied as desired.

The motor armature St) is only indicated conventiimally. for the sake of clearncss, and it may be of any known or other suitabl form. The armature shaft til (Figs. l-ti) is provided at the left-hand end in Fig. l with a shouldered and reduced portion th s portion being journaled in a deep groove, thrust balhbcaring 83}. which bearing seated against a shoulder Sll'orined in the interior of the hollow huh iii of the field winding housing. A reduced end d) of the shaft 81 is screw-threaded, and a nut 86 is screwed thereon, to retain the parts in position.

On the opposite side of the armature is a like bearing, there being; a reduced part 89 of the armature shaft 81 journaled in a deep groove, thrust ball-bearing 90, which bearing is seated in the interior of the hollow hub 16 of the field winding housing, against a shoulder 91 formed in the interior of the hub. The right-hand end of the armature shaft 81 has a reduced portion 5);), extending out a considerable distance from the reduced portion 89, to constitute a drive for the kcrf-cutter mechanism. A nut 9i shown screwed on the end of the shaft to hold the parts in position.

The electrical connections for the motor may be of any known or suitable form, and are shown only in a general way. As so shown, an insulated conductor ring 106 is carried in the face of the brake drum 28 of the field winding housing. A brush 107 is in contact with the ring106, and connects with a power supplying cable 108, the parts being protected by a casing 109.

Referring now to the details ofthe embodied driving mechanism for the kerf cutter, and for progressing the machine to the work as the cutting advances (Figs. 1 to a beveled gear 117 meshes with the pinion 95, the gear having a long hub 118. This hub rests'on a friction washer 119, the washer resting upon a bearing sleeve 120 formed in a fiat web 121 integral with the ff pillar 3, and with an end support 122, which is likewise integral with the machine frame, these parts being portions of a housing about the driving mechanism. The hub 118 is also provided with a radial thrust ballbearing 129, which is mounted in a seat 130 the cap plate 131, and exteriorly thereto it.

is keyed to a horizontally-disposed brakedrum 14-1, which has a downwardly-extending hub, which rests and rotates upon a hub 1 1-3, formed on the upper face of the cap plate 131. The hub 118 of the bevel wheel is keyed to the drum brake 1 11 by a suitable key 144.

Within the hub 118, but not directly connected thereto is a vertical cutter-chain driv ing shaft 157, there being sleeves 158, 159

and 160 between the hub 118, the hub 120, and the shaft 157. At its upper end shaft 157 has fixed thereto by suitable key 168, a power connecting and disconnecting disc or plate 167. A fastening bolt 169 is screwed into the head'of the shaft 157 to hold the connecting and disconnecting disc 167 in longitudinal position. The disc 167 is provided with a downwardlydepending hub, which is carried upon a ball-bearing 170, which bearing rests upon the top face of the hubof the brake drum M1.

Means are provided for connecting and disconnecting the brake drum 14-1 and the disc 167, and therewith connecting and disconnecting the cutter-chain driving shaft 157 and the bevel gear 117, which in turn is driven fromthe motor armatureSl'. As embodied, the disc 167 is provided with a horizontally-disposed, exterior flange 173 parallel with, and closely contiguous to the face of the brake drum 141. In the flange 173 are formed a plurality of apertures 174, and corresponding apertures 175 are formed in the flat face of the brake drum 1 11. A suitable device is employed for connecting together and disconnecting the drum 1 11 and the disc 167, such as the ,U-shape memher 17% (Figs. 1 and 2), which may be inserted into adjacent apertures in the disc and drum, to cause them to rotate together. Member 17 6 may be engaged by the central: portion and lifted outfrom the apertures, thereby disconnecting the disc 167 and the drum 1e11, so that the shaft 157, and consequently the kerf cutting mechanism are mechanically disconnected from the motor.

Referring now to the particular form of kerfcutting mechanism herein exeinplarily employed and illustrated, a guide bar 19 1 is employed, having a mounting in themachine frame, as best shown in Figs. 1 and 9. The inner end of the bar fits into a horizontally-disposed recess, formed in the base of the machine between the bottom plate 1, a

top. plate 192 and side plate 193. The bar is provided at this inner end with slots 194: and195, and

bolts

196 and 197 pass through the top plate 192, and the bottom plate l, and through the slots 194: and 195, to main tain the cutter bar inposition.

To maintain the cutter bar 191 against endwise displacement a plurality of apertures 199 are provided in the bar contiguous I to the outer end of the bed plate of the 1112ichine, and a pin 200is driven into the hole 199 which happens to come in register wit the end edge of the bed plate. This pin thus takes up the end thrust on the bar and conveys it directly to the bed plate of the ma chine. r

The cutter bar is provided along its edges with guides 203 and 20st, along which the flexible chain cutter 205 runs, the chain being provided with teeth 20-8. This z -t ucture may be of any suitable or known rm and need not be described in detail. At its inner end, the cutter chain runs over a sprocket wheel 207, fixed to shaft 157 by a key 208,

the cutter chain being thus driven from the shaft 157,- andthereby from the armature ire cutter bar, and the relative action of the cutter bar mechanism and 01 the means for advancing the machine to the work as the kert' is cut. In the embodied form there of, this is etl'ected, in part at least, by the action of the brake mechanism oi the brake drums and 1 11. The action of the brake drum 15b is exerted directly upon the lield winding housing', and the action oi? the brake drum 1 1-1 may be exerted on the motor armature either when the load of the kerl' cutting chain is thereon, or when it is disconnected therefrom.

Referring now to the control for the brake drum 28, a brake hand 21b. is provided (Figs. 1, 2, 3 and 5) C(iOIJtil'tltlZlg with the drum. One end of the hand 21b is pivot,- ally connected at 211) to a forked lever 5320, which lever is pivoted at to an extension 223 of the bearing cup :31? of bearing The other end 01' the brake band 21:5 is pivotally connected at 22-1 to the lever :220 at the other side of its pivot hearing 13212 from the pivotal connection 219 lot the other end of the brake hand. In the exterior end of the lever 220 is an aperture through which projects a bolt which bolt, al o extend; through an aperture in the ittll'lI l iiiliili reach 61 of the bracket. already described. with the head 226 of the bolt resting against the underside of the bracket. A wine nut 22?, or other suitable regulating device, is screwet on the bolt and thus the action ot the brake band 218 on the drum 28 may be nicely and continuously regulated.

Referring; now to the regulating means for the brake drum 141, it will he recalled that this may be used in connection with the connecting and disconnecting mechanisms for the brake drum and disc 167. In the embodied form of said means, a brake band 239 cooperates with the brake drum i111 (Figs. 1, Q, 3 and 5), one end of the brake hand 2-59 being pivoted at 2410 to a pin forming part of a lever 2 11. This lever comprises two parallel plates connected to. spaced apart by a hub at its pivot point (Figs. El and The pin Q-lt'f) is lixed in both side plates of the lever. The lever 2-11 is pivotally mounted at its tll iQl'l'llltitl huh 21-2 on a pin extending upwardly from a seat 3-13 formed on the housing cap plate 131.

The other end Off the brake band 235) is pivoted at 13- 4: to another pin. i'nounted in both of the side plates of the lever 5A1, and located on the opposite side of the hub and pivot point 2&2 of the lever from the other end 240 of the brake band. Pivotally connected to the outer end of the lever 2&1 is a link 24", which link is pivoted at 2&6 to a lever 247, which in turn is pirotally mounted at 248 on the machine frame. Thus, by moving lever 2-17 the frictional action of brake band 239 on drum 141 may he regulated as desired. Suitable means are provided for holding the lever 24-? in any position to which it may be moved to ell'ect or vary the action 01 the brake hand :Z U upon the drum 141.

A plurality of guiding sheaves for the cables (1 and b on the drums 1:3 and 25b are provided at suitable locations, and are indicated in the drawings by rclcreuce numerals 2.30 to 258. There is shown in Fig. l) a sheave 2M) mounted on, and at or near the exterior end oi, the chain cutter bar.

The operation of the machine in so far as described may be first stated in a general way, and particular applications thereof will be more fully illustrated l'rom the diagrams of Figs. 13 to 19 of the drawing. For such general description, the machine may he assumed as being operated, the cutter bar being driven from the nmtor by reason of the. member lTti connecting disc lti'i' with brake drum l-ll. As the machine operates, the armature So will rotate in one direction. and the lield windings 11 and the housing therefor in the opposite direction.

The armature, through pinion 95 and gear wh el 11?. brake drum 141. diec 1t)? and shall 1517, will drive the cutter chain. At the to time, the rotation ol. the hold winding housin in the opposite direction will wind the cable a onto the drum 12 to progress the machine forwardly and hold the cutter to the work as it cuts the lzerl. Should the cutting lie easy, and, therefore, rapid, by applying the brake hand 323!) to a desired degree to the brake drum 1 11, greater resistance or load put upon the armature, and the tendency to rotation or torque of the lield winding hous ing is increased, the cable a will he wound on the drum 12 more rapidly. and the machine will be advanced 'l'aster into the work.

By releasing the brake drum Bill), the speed of the cutterrelatively totl ftltl't'tllltilllg cable will he increased, and the machine thereby adjusted to advance slowly with a relatively high speed of the cutter chain, as in work when the cutting is hard and consequently slower.

ll the connectin link lTt; is removed, the driving connection between the armature 8t) and the cutter bar is disconnected. ll now the brake band :23?) be tightened on the brake drum 1&1, a load is thrown on the armature, and this will result in im 'iosinn' a torque in the opposite direction upon the lield winding housing. and the cable will he wound on the drum 12 to prop] is the machine alone the lloor or support; without operating the ltcrt' cutting mechanism.

The drum 51 is employed l'or directive pin-poses, as this drum is loose on its mounting. The cable 7 is arraim'ti-d to he paid out. from the drum, the paying out. or the rate of paying out, being controlled and determined by the action of the brake hand :32 on the brake drum. The exterior end of the cable llll is anchored to some fixed point such as a jack-post, and ifthe rear end of the machine is moving too slowly and tending to throw the machine out of alignment, the wing nutwould be slightly unscrewed, thus tending to permit if oer pa ing out of the cable at, and the machine would be brought into alinement as desired for cutting. In case the rear end of the machine were traveling too freely and thereby tending to move out of alinernent in the opposite direction, the wing nut would be screwed down, the brake band would be tightened and the tendency of the drum 88 to rotate would be lessened and again the cable would tend'to correct the position of the machine. Further exemplary explanation of the uses of these devices will be provided in connection withthe diagrammatic figures.

In the exemplary embodiment already de scribed, the means for progressing the machine and holding it to the work has been shown mounted directly on the field winding housing and rotating directly therewith. In practical operations, however, it will usually be found advisable to have a speedreduction gearing interposed between the housing and the winding cable, and it will usually be found necessary or convenient also to employ a clutch mechanism for throwing in and out the machine progressing mechanism.

In Figs. 6, 7 and 8 there is shown an exemplary embodiment of such mechanism. The parts of the mechanism corresponding to those precedingly described will not be referred to again, but the same reference numerals will be applied thereto. In this embodiment also, as a matter of convenience in design, the relative position of the two winding cables a and b has been reversed, the positively wound cable beingshown at the left hand end in Fig. 6 and the. paying-off cable at the right hand end, whereas, the reverse is the case in the form shown in Figs. 1 to 3'. The explanation previously given as to the coaction of the cables in progressing and steering the machine, will be understood as being correspondingly modified for this changed structure, and will be clear without further elaboration.

Referring now to the speed-reduction and clutch mechanism in the form shown in Figs. 6 to 8, the hub 31 terminates at the outside of bearing 2. The end of the hub is provided with a flat end plate 271. Fixed concentrically in the plate 271 is one end of a shaft 272, the shaft projecting therefrom, and the other end thereof being journaled in asleeve 273. This sleeve is journaled in a bearing 2%, formed in a pillar 275, extending upwardly from the bed alate 1 of the machine.

Fixed to shaft 27 2 are plate elements 278 of a friction disc clutch mechanism, by means of a ltey 2Y7. The cooperating plates 238 of the disc clutch are fixed to a housing or casing 279, which housing has integral therewith a sleeve 280 encircling the friction sleeve 278. Integral with, or fixed on, the sleeve 280 is a worm 281, whereby the worm rotates with the plates 278 when they are driven from the plates 276.

The clutch actuating and controlling means comprises a disc 282, adapted to contact on its side face with the exterior fric tion disc 278'. Disc 282 is integral with a sleeve 283, which loosely encircles, and is slidable along shaft 212. Sleeve 283 is provided with an exterior annular groove 284, and a compression spring 285 impels the disc 282 into strong frictional engagement withthe clutch disc. A controlling lever 288 is pivotally mounted at 289 on the machine frame, and has a pin 290 projecting into the slot 284, whereby the clutch may be thrown in and out. Suitable means for retaining the lever 288 in any desired position may be provided, but are omitted for the sake of clearness.

In me h with worm 281 is a worm wheel 299, fixed to a vertically-disposed shaft 300 by means of a key 301, Shaft 300 is journaled at its upper end in a horizontal eXtension 302 of a bracket 303, fixed to, and extending upwardly from, the bed plate 1 of the machine. F iXed also to shaft 300 by key 304: is a drum 305 upon which is wound a cable a, this cable corresponding to the cable a in the structure shown in Figs. 1 to 5. Drum 305 has

flanges

306 and 307, and its bottom endface rests on a hub-like seaton the bed plate. v

Thus there is provided any desired speed reduction between the motor field housing,

and the winding drum for winding or progressino the machine forwardly and holding the'kerr cutting bar to the work as the cutting progresses.

In Figs. 13 to 19 there are illustrated exemplarily and diagrammatically certain 'ways of moving and using the machine, utilizing the motor, the cable drums, cables, and brakes, and properly located jack-posts. In. Fig. 13 the mining machine is shown being drawn into a room. by winding the cable a onto the drum 12, the cablebeing reeved alongcertain of the sheaves 253-258 as shown. the cable being attached to a jack post The cutter bar is, of course, disconnected from its drive. In like manner the machine may wind itself onto a mining machine carrier. 1

In Fig. 14 the machine is shown being swung around in the direction of the arrow to bring the cutter bar up to the face of the room. As shown, the cable a is reeved past one of the sheaves on the body of the machine, and around the sheave 259 on the out ter bar, and the machine will be thereby vmoved. from the position of Fig. 14: to that of Fig. 15, the cable being rearranged about the sheaves, in the meantime, and at the proper position in the turning operation.

Fig. 15 shows the machine with the cutter bar pointed into one corner of the face and rim of the room, preparatory to stnnping the cutter bar to a new cut. In this PO::ltion, the cable a impels the n achine, with one component oi? its pull substantially along the cutter bar. The cable i) is likewise anchored to a jack-post j. and the brake band 52 is set to that the swinging motion of the mining machine just sutiicient that the end of the cutter bar will progress forwardly :nhstantially in line with the room rib, until the proper depth for the lrrrt is obtained.

In Fig. 16 the arrangement of the cables; is shown for the turning ot the machine to bring the cutter bar perpeinlicnlar to the room face. preparator to traveling across the face. cutting the lteri. In Fig. 17 the machine is shown at any point a it travels across the room taco. cutting the ltcrt The cable a is Wound onto the drum 1?. to progress the machine and the cutter bar to the Work of cutting the lteri. and the bral-ze will be set to regulate the paying: oil? of the cable Z) at such rate as to keep the machine and the cutter bar parallel to the room face.

In Fig. 18 the machine is shown nearing the completion oi the ltcrt cut. the "able (1 being rcered about the sheaves and hauling onto a jack-post placed to the rear and sub stantially parallel to the rib. The cable 5 will be controlled by proper slipping ot the drum 38. so that the utter bar will travel backwardly subsantially parallel with the room rib.

In Fig. 19 the machine is shown hauling itself out of the room. or onto a mining machine carrier as may he desired.

From all the thregzoingr it will be understood that a mechaniJ-m has been provided constitutingan exemplary embodiment of the invention, and realizing the objects and advantages herein set forth, together with other objects and advantages. It will be understood, further. that departures may he made from the exact mechanism as shown and described. within the scope of the accompanying claims. Without departing from the principles of the invention and Without sacrificing it= chief advantages.

What; I claim is:-

1. A n'iining' machine including; in combination a motor having a rotatable field and a rotatable armature. a item": cutter. means for driving the lcerl cutter from one of Said rotatable motor elements. and means driven from the other of said rotatable motor elements for progressing the machine during the kerf cutting.

52. A mining machine including in combination a motor having a rotatable held and a rotatable armature, :1 her! cutter. means for driving: the lterf cutter from one oi said rotatable motor elements, and means driven from the other of said rotatable motor elements for proglressinethe machine during the hert' cutting. and means l'or maintaining: the alinemcnt oi the nnichinc with its work.

3. A n'iinin r machine includiini' in combination a motor haringr a rota able field and a rotatable armature. a licz'l' cutter. means for driv ng the i-zez'l' cutt r iron! on of said rotatz'ible Inoim element means driven from the other of said rotatable motor element for progre annr he nrn'hin during the keri' cutting. and oat-inn ind pendent of the motor and utter drive for maintaining: the alineineut oi' h machin with its work.

i. A minim; machine in luding in ('Hi!lbination a motor harint: a rotatabl iichl and a rotatable armature. itcrl' cutt r. means tor (hiring the ltert cutter from one oi said rotatable motor elements. m an driven from the other of eaid rotatable motor elements for ]')1() [1(t.$ili[f the ma hine duringthe hcrl' cutting. and nicatn' comprising" a drum and bralze :iur maiutaiuinrf the al nmcnt oi the machine with it work.

5. mining machine including in ombination a motor having: a rotatable Fi ld and a rotataliile armature. a lt rt cutter.m anfor driving; the lterf cutter from one oi wit! rotatable motor elements. and mean iii-iron from the other of said rot: table motor r-iements. and including braking tieriew. 1'15 progressing the machine fllll'illfj the h cutting.

(i. A. mining: machine ineiudino' in mbination a motor having a rotatabl held and a rotatable aruntt'ure. a lit-r1" utt r. mean for driving the kert' cutter from on oi" flitl rotatable motor elements. and mean: d iven from the other of said rotatable motor elements. and int-hiding: a ca l drum mil bral-ze. ior progressing th unnhin 'iurina the hert cutting.

7. A. mining:- ma hine including in combination a motor baring a rotatabl ii hl and a rotatable armature. a k rf cntt r. un-au for (lZ'iYll'lfi the liert cutt r tron: on o i' aid rotatable motor elements. and inc-ins driven from the other ot' said rotatable uiotol (i ments. including a bruising devi and a coble drum rotated by said other rotatabl motor element. for pi'og'r siiw the ma hine during" the lterf cutting.

S. A. mining" machine including in combination a motor baring a rotatabl field and a rotatable armature. a hert cutter. 1n ans for driving" the ion-t cutter from on of said rotatable motor elements. int-am to. regulahlv applying additional re" lan e 1|.- the cutter drivine' means. and new driv n Ill) from the other of said rotatable motor elements for progressing the mach ne durmg the kert cutting.

9 A mining machine including in combination a motor having a rotatable field and a rotatable armature, a lzerzt cutter, means for driving the ker't cutter from one of said rotatable motor elements, means comprising a brake drum andbrahe tor regulably applying additional resistance to the cutter driving means, and means driven from the other of said rotatable motor elements for progressing the machine during the kert' cutting.

10. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kert cutter, means for driving the lrerf cutter from one of said rotatable motor elements, means for regulably applying additional resistance to the cutter driving means, and means driven from the other oi said rotatable motor elements, and including braking devices, for progressing the machine during the liert cutting.

11. A mining machine including in combination a motor havinga rotatable held and a rotatable armature, a ker'f cutter, means for driving the lrerf cutter from one of said rotatable motor elements, means comprising a brake drum and brake tt'or regulably applying additional resistance to the cutter driving means, and means driven from the other of said rotatable motor ele ments, and including braking devices, for progressing the machine during the lrerf cutting.

12. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a lzerf cutter, means for driving the lcerf cutter from one of said rotatable motor elements, means for r'egulably applying additional resistance to the cutter driving means, and means driven from the other of said rotatable motor elements, including a braking device and a cable drum rotated by said other rotatable motor element, for progressing the machine duringthe lrerf cutting. I

13, A K111111153 machme including in com bination a motor having a rotatable fieldv and a rotatable armature, a lrerif cutter, means for driving the kerit cutter from one of said rotatable motor elements, means comprising a brake drum and brake tor regulably applying additional resistance to the cutter driving means, and means driven from the other of said rotatable motor elements, including a braking device and a cable drum rotated by said other rotatable motor element, for progressing the machine during the kerf cutting. I

14:. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter, means forvdriving the kerf cutter from one of said rotatable motor elements, and means for plying resistance to the other of said rotatable motor elements to govern the torque of the rotatable motor element driving the kerf cutter. g

15. A mining machine includlng 111 combination a motor havlng a rotatable field and a rotatable arn iature, a kert cutter, means for applying resistance to the other of said rotatable motor elements, including a brake and a brake drum rotating WllT-ll said motor element, to govern the torque of the re tatable cutter.

17. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter, means for driving the kertcutter from one of said rotatable motor elements, means for applying resistance to the other of said romotor element driving the kert tatable motor elements to govern the torque of the rotatable motor element driving the kert cutter, and means driven from said other motor elementtor progressing the machine to the Work during the kerf cuttin 7 18. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter,

means for driving the ker'f cutter from'one of said rotatable motor elements, means for applying resistance to the other of said rotatable motor elements to govern the torque of the rotatable motor element driving the keri cutter, and means including a cable Windingdrum driven -from said other motor element for progressing the machine to the Work during the lrer't cutting.

19. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a lrer'f cutter, means for driving the kerf cutter from one of said rotatable motor elements, means tor applying resistance to the other of said rotatable motor elements, including a brake and] a brake drum rotating with said motor element, to govern the torque of the rotatable motor element driving the kert cutter, and means driven from said other motor eleinent for progressing the machine to the Work during the kert cutting.

20. A mining machine including in com bination a motor having a rotatable field and a rotatable armature, a kart cutter, means Ell iii)

for driving the kerf cutter from one of said rotatable motor elements, means for applying resistance to the other of said rotatable motor elements, including a brake and a brake drum rotating with said motor element, to govern the torque of the rotatable motor element driving the kerf cutter. and means including a cable vinding drum driven from said other motor element for progressing the machine to the Work during the kert cutting.

21. A mining machine including in combination a motor having a rotatable field and a rotatable armature. a lteri? cutter, means for driving the ltert cutter from one of said rotatable motor elements, means I01 disconnecting the kerf cutter and its driving motor element. and means driven from the other of said rotatable motor elements for progressing the machine during the lrert cutting.

22. A mining machine including in combination amotor having a rotatable tield and a rotatable armature. a kerf cutter, means for driving the kerf cutter from one o1" said rotatable motor elements. means for disconnccting the kerf cutter and its driving motor element, and means driven from the other of said rotatable motor elements, and includ ing braking devices. for progressing the machine during the kerf cutting.

23. A mining machine including in combination a motor having a rotatable field, and a rotatable armature, a kerf cutter, means for driving the kerf cutter from one of said rotatable motor elements. means for regulably applying additional resistance to the cutter driving means. means driven from the other of said rotatable motor elements for progressing the machine during the kerf cutting, and means for disconnecting the kcrf cutter trom its driving motor element Without disconnecting said resistance applying means.

24. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kcif cutter, means for driving the kerf cutter from one of said rotatable motor elements, means comprising a brake drum and brake. for regulablv appl ving additional resistance to the cutter driving means. means driven from the other of said rotatable motor elements for progressing the machine during the hem" cutting. and means for disconnecting the li'crt cutter from its driving motor element Without disconnecting said resistance applying means.

25. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter, means for driving the kcrt cutter from one of said rotatable motor elements. means for regulably applying additional resistance to the cutter driving means, means driven from the other of said rotatable motor elements, and including braking devices, for progressing the machine during the kerf cutting, and means for disconnecting the kert cutter from its driving motor element without disconnecting said resistance applying means.

26. A mining machine including in combination a motor having a rotatable field and :1V rotatable aru'iature, a hcrt cutter. means for driving the lreri cutter fr m one of said rotatable motor elements. and means for controlling the torque of said motor elements.

27. A mining machine including in combination a motor having a rotatable tield and a rotatable armature. a hert' cutter. means for driving the kcrf cutter from one of said rotatabie motor elements. and means for applying resistance to said driving action to var; the torque of the other of said rotatable motor elements.

28. A mining machine including in combination a motor having a rotatable field and a rotatable arn'iaturc. a hert cut tcr. means For driving the lzcrf cutter from one ot said rota table motor clen'ients. n'ieans driven from the other of said rotatable motor elements for progressing the machine to the work during the kcrt cutting and means for applying resistance to the cutter driving connections to regulate the relative action of the kert cutter and the machine progressing i a can s.

29. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kert cutter. means for driving the kCTf cutter from one of said rotatable motor elements. means driven from the other oi said rotatable motor elements for progressing the machine during the kert cutting. and reduction gearing between said machine progressing means and its driving motor element.

30. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter, means for driving the kerf cutter from one of said rotatable motor elements. and means driven from the other of said rotatable motor elements, and including braking devices. for progressingthe machine during the lterl' cutting, and reduction gearing between said machine progressing means and its driving motor element.

31. A mining machine including in combi-. nation a motor having a rotatable lield and a rotatable ZU'IIXQiUI'Q. a kerf cutter. means for driving the kerf cutter from one of said rotatable motor elements. means for appl ving resistance to the other of said rotatable motor elements to govern the torque of the rotatable motor element driving the ltcri cutter, means driven from said other motor element for progressing the machine to the Work during the ltert cutting, and reduction gearing between said machine progr wzing means and its: driving motor element till 32. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter and connections for driving it from one of said rotatable motor elements, a braking device acting on said driving connections, means for disconnecting the lrerf cutter beyond said braking means, a cable Winding drum and connections for driving it from the other of said rotatable motor elements, and braking means acting on said cable Winding drum.

33. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter and connections for driving it from one of said rotatable motor elements, a braking device acting on said driving connections, means for disconnecting the kerf cutter beyond said braking means, a cable Winding drum and connections for driving it from the other of said rotatable motor elements, and braking means acting on said cable Winding drum, a loose cable drum and a brake there for.

34. A mining machine including in combination a motor having a rotatable field and a rotatable armature, a kerf cutter and connections for driving it from one of said rotatable motor elements, a braking device acting on said driving connections, a cable Winding drum and connections for driving it from the other of said rotatable motor elements, and braking means acting on said cable winding drum.

35. A machine including a motor having a rotatable field and a rotatable armature,

rotatable about a horizontal axis, a kerf cutter, driving means, rotatable about a vertical axis, for driving the kerf cutter, and connections for actuating said driving means from one of said rotatable motor'elements, machine progressing means and connections for driving said progressing means from the other of said rotatable motor elements.

36. A machine including a motor having a rotatable field and a rotatable armature, kerf cutting means, driving means, rotatable about a vertical axis, for'driving the kerf cutter and connections for driving said kerf cutting means from one of said rotatable motor elements, machine progressing means and connections for driving said progressing means from the other of said rotatable motor elements, and means for maintaining the machine in alinement with its Work.

37. A machine including a motor having a rotatable field and a rotatable armature, Work performing means and connections for driving said means from one of said rotatable motor elements, machine progressing means and connections for driving said progressing means from the other of said rotatable motor elements, and devices for controlling the relative torque of said rotatable motor elements to govern the relative action of the Work performing means and the machine progressing means.

In testimony whereof, I haxe signed my name to this specification.

KENNETH DAVIS.