US1704671A - Mining machine - Google Patents

Description

March 5, 1929. c. F. OSGOOD MINING MACHINE 3 Sheets-Sheet 1 Original Filed Aug. '7, 1925 0 O O O O O Invemivr g0 W dtig' 7 March 5; 1929.

c. F. oseooo MINING MACHINE Original Filed Aug. 1925 3 Sheets-Shee't 2 w wms w March 5, 1929. c. F. OSGOOD MINING MACHINE OriginaLFiled Aug. 7, 1925 3 Sheets-Sheet 3 l'rvuenior: C iz/arzesfl'asigaad.

wzz} w I under.

Fatented ltlar. 5, was.

s r-res rarest ser es.

' CHARLES F. oseoon, on CLARE-MONT, new narersiiinn, Assmnosre. snnnivnn.

MACHINERY coIvrrANY, A oonronnrron on MASSACHUSETTS.

MINiNG MACHINE.

Application file-d August 7, 1925, Serial No. 48,808. Renewed November 22, 1927.

My invention relates to mining machines of the continuous cutter type and more particularly to mining machines of the continuous cutter type adapted to be fed laterally relatively to the The primary object of my invention is to provide an improved mining machine wherein but a single teed operating memberis utilized to feed the machine and to control its angular relation with respect to the face of the coal. Another object of-my invention is the provision of improved feeding mechanism for a mining machine. More particu larly it is an object of the invention to provide improved feeding mechanism for such a machine wherein a feed operating member may be driven in either direction at either a feeding or a cutting speed. A further object of the invention is to provide improved actuating means for a feed operatingmember arranged midway between the sides of the mining machine frame wherein due to the location of the eleme of the driving trains great compactness may be secured. Other objects and'admntages of thBIDVGIltlOIl will hereinafter appear.

in a preferred form the invention may comprise a main frame slidable on its bottom on the mine bottom and having mounted thereon, a projecting cutter chain carrying cutter bar. The machine may be propelled both during; cutting and atother times preferably by a single continuous flexible feedinc; member secured at its free ends at the'advancinc and receding sides of themachine, respect *ely, and with which a single rotatable "feed operating member-cooperates 1n erfecting feeding: and controlling movement ofthe machine. A single motor preferably supplies power both to the cuttingand "feeding mechanisms and is mounted on the mam frame at the forward end of the latter in a position overlying the rear end of'the cutter bar. Power may be transmitted from the motor to the cutting and feeding mechanisms by means including a pinion on the rear end of the armature shaftand' an improved VELIlable speed transmission mechanism. Pierciably the transmission mechanism comprises a plurality of driving members rotatmgat coal tace to cut a kerf therev her. means including elements associated with members of each of said pairs and adapted to be driven thereby for selectively driving a teed operatingmember, and friction controlled transmission devices between said elements and the feed operating member. i V

In the accompanying drawings I have shown for purposes of illustration two forms which my invention may assume in practice.

ln't-hese drawings- V ig. 1. is a plan view of amining machine constructed in accordance with one embodi" inent of my invention. v

Fig. 2 is a partialside' elevational view of ie machine shown in Fig.1.

isten;

machine s ioWninFig. 1.

l 4 is'an enlarged transverse horizontal dew partially in elevation taken substantiallyon line 4l -l of Fig. 9. V

is an enlarged detail sectional view: oi one of the feed controllingclutches] Fig. (Sis a detail transverse vertical sectional View taken substantially on line 6 -6 OfFig.l. v

Fig. 7 is a detail sectional view of the intel-locking mechanism for the feed controlling clutches.

Fig; S is a slightly" modified form of the planetary gearingshown in Fi 4:.

Fig. 9 is alongitudinally extending central vertical sectional view, partially in elevation, taken substantially on line 9-9 of Fig. 4. I

Fig. 1.0 is a partial plan view of a slightly" modified form of structure wherein a feed In the construction illustrated in Figs. 1

to 9 I have shown for the purposes of illustration a mining machine. generally designated 1, which is herein of the ilexibly't'ed, continuous cutter room and pillar type slidable on the mine bottom and having a main frame 20f generally rectangularshape presenting parallel'plane surfaces ?)'and t upon which the machine adaptedto be selectively supported, e. when the machine is being} utilized'as an undercutter or inverted and utilized as an. overcutter'. Thenla-chine frame 2 comprises a bottom bed section 5, a motor section 6. and a feed and cutting mechanism carryin section 7. the sections 8 large bevel gear secured,

to a vertlcalcoaxlally disposec shaft 22. The

and 7 being supported upon thebed section 5 and rigidly secured thereto in any approved manner. As SllGWlL suitably rigidly secured within and projecting forwardly from the bed section 5 is a rigid cutter bar 8'about the outer edges of which a cutter bit carrying cutter chain 9 is adapted to be circulated, the

7 rear end of the fr: me section 7 by which an improved fee-i; operating member 12, herein in the form of a chain sorocket is carried and 1. 1

this sprocket is likewise driven from the motor 10 through improved transm ssmn means here nafter described. The sprocket 12 is rotatable on a horizontal. longitudinally extending'axis lying inthe central longitudinal vertical plane of the machine. 7

In describing the cutting mechanism and the transmission gearingtherefor, which is substantially the same as that disclosed in a pending application of one Morris l Holmes, led March 14, 1925, Ser. No. 15 615, it will herein be observed that the rear end of the longitudinally extending horizontal armatur'e shaft '13 has suitably secured thereto a spur motor pinion 1.4 (see Figs; 4 and 9). The pinion 14 is meshed with a spur gear 15 secured to a shaft 16 disposed parallel with the shaft 13 and journaled Within suitable ball bearings 17 carried Within a supporting member or bracket 18 and, suitably secured Within the frame section? The rear end of the shaftl6 has suitably secured thereto a bevel pinion 19 which is meshed with. a as by key 21,

lower end of the shaft 22 has suitably secured thereto a spur pinion 28 which is meshed with large spur gear 24, the hub of which is keyed as at 25, to the lower end of a vertical drive shaft 26, the shaft 26 being disposed in the rear'of and parallel with the shaft 22. The hub of the gear 24 has journaled thereon a usual driving spbcket 27 which cooper L with the cutter chain 9 to drive the latter in a wellknown manner. As illustrated, the cutter chain sprocket 27 is adapted to be connected in operative driving relation with the shaft 26 by means of a clutch shipper member 28 splinechas at 29, to the shaft 26 and which shipper is provided at its lower end with clutch teeth 30 which are adapted to cooper ate with clutch teeth 31 formed in the upper end of the sprocket 27. Furthermor the shipper member 28 is provided with a pe ioln eral groove 32 with which the cri s shipper yoke" 83 are'adapted to cooper-a .i. he shipper yoke 33 is herein preferably secured to atransverse izontal shaft 34 joiunaled at its endswithin the lies of the frame section 7 and having secured thereto an upstanding slotted arm or crank 35. Cooperating with the slot in the crank 35 is an eccentric pin 36 secured to an operating shaft 37 by which an operating member or handle 88 is carried. From the foregoing description it will be evident that when it is desired by the operator connect the sprocket 27 in operative driving relation with the shaft 26 the operating member 58 is manipulated causing the eccentric pin 36 to re 'tate the shaft and consequently swing the shipper yoke about its pivot thus moving the slipper member 28 longitudinally of the shaft 26 and the gears 30 and 31 into operative driving relation. j

The improved feeding mechanism is adapted to effect actuation of thefeed operating member 12 in opposite directions through suitable fast and slow speed gearing. First considering the mechanism common to both feeds and the fast feed mechanism more specifically, it Will be noted that the upstandthe latter and this shaft 41 is journaled at its upper end Within suitable balllbearings: 42.

carried by the machine frame. Moreover, suitably secured intermediate the, ends ofthe shaft 41 is a fast speed Worm 43 which is meshed withworm gears 44and 45 rotatable in' opposite relation on longitudinally extending horizontal axes parallel with the axis of the feed operating member 12 and spaced equally at eachside' of the central vertical longitudinal axis of'the machine (see Fig. 4) The worm gears 44 and 45 each have se cured thereto, as by studs 46, (see Fig. 5) hub portions 47 and 48 the former being journaled upon hearing sleeves 49 carried by iongit-udinally extending horizontalshafts 50 and oldisposed coaxially with the axes of.

the Worm gears 44 and 45, respectively. As

illus rated; the forward ends of the shafts 5O and Fl are journaled Within suitable ball annular retaining members 54 likewise'suitably carried by the machine frame. Housed 'Within the worm gears 44 and 45 are friction disc clutches which each comprise, a series of interleaveddlscs 55 and 56 (see Fig. one set of which is secured to the Worm gears while the other set is suitably secured to clutch sleeves 57 keyechas at 58, to the shafts 50 and 51, respectively, Encircling the hubs 48 of the worm are cylindrical plane clutch operating members 59 which are provided with oitudinally ]e*tending fingers 60 which through apertures 61 formed in the worm gears 44 and 45 and which are adapted to en a 'e certain of the clutch discs 7 Zn '1: and 56 As illustrated the rearends of the shafts 50 and 51 have suitably Secured thereto spur pinions 62 and 63, respectively, which are meshed with a larger spur gear64: disposed on alongitudinally extending hori- Zontal axis coaxial with the axis of the feedv operating member 12. The gear 64 is suitably secured to a shaft 65 suitably journaled cluding a lever 72 with which a threaded V plying member. 73is pivotally connected and this latter member cooperates with a hand wheel nut- 74 carried by the rear end of the machine frame. As illustrated, the planetary gears 67 are journaled on stub shafts 7 5 formed integral with a supporting member 7 6, the latter having secured thereto a shaft portion-7'7 disposed coaxial with the shaft 65 and with the feed operating member 12, this shaft portion being journaled in bearings 78 and 7 9 suitably carried by the detachable frame section 11. It will herein be observed that the shaft Y'iis provided with a reduced rear end portion 80 which has secured thereto, as by a key 81, the hub of a spur gear 8?. Loosely journaled on they hub of the gear 82 is a spur gear 83 havingsecured thereto, as by a key 8 1-, the feed'operating member 12. It will further be noted that the gears 82 and 88 are adapted to be connected in operative driving relation by means of a longitudinally reciprocable internal gear clutch 85 disposed.

coaxially' with the shaft 77. Furthermore,

the clutch member 85 may he slid longitudik nally into engagement with a truck driving member 86 indicated bv dotted lines in Fig; 9 similar to that described in the pending Holmes application noted above. From the foregoing description it will be evident that when the clutch discs 55, 56c0ntrolling the driving of the shafts 50, 51, respectively, are selectively applied, power may be trans mitted from the motor 10 through the armature shaft, the motor pinion 1 1-, the spur gear 15, the bevel pinion 19, the bevel gear 20, shaft 11, worm 13, either of worm gears 14 and 45, one or the other of the spur pin'ions 62, 63, spur gear 64, pinion 66, planetary gears 67, and shaft 7 7 the internal reaction gear 68 be ing held stationary. nected to the feed operating member 12 through the clutch 85 and the gears 82 and 83 to drive the feed operating member. in one direction or the other at a fast speed. It will further be noted that such speed maybe varied at will by varying the application of the brake band 71 or by suitably slipping the The shaft Z7- is con clutch discs 55, '56. It will herein be notedthat if desired the variable speed obtained by the brake band 71 may be elimin'ated,the I internal reaction gear 68 then being held stationary with respect to the frame section 11 by *means of a suitable he 87' see Fi 8 In specifically describing the'slow speed transmission means it will herein be observed that suitably secured to the upper end of the shaft 26 1s a slow speed'worm. 88 having I teeth of less inclination than the teeth of the fast speed worm 43 and th s worm 88 is meshed with worm gears'89 and 90, respectively, disposed coa-Xially with the worm gears dtand 4-5 and of substantially similar structure. The worm gears 89 and 90 are rotatable in opposite directions and each; houses.

a suitable friction disc clutch. As the structure of these gears 89 and 90and the clutches housed therein 1s'substant1aliy identical with that described with respect to the gears 14, 45

and the clutches 55, 56, further detailed de scription of the same is considered unnecessary, other than to say thatcylindrical plane I 90 vidod for. applying the clutches andconncctmg the gears-89 and 90 in driving relation clutch operating members 91 and 92 are pro with the shafts 50 and'51, respectively; From the foregoing description it will beevidentf pinion 23 carried by the lower cnd'of the.

shaft 22, spur gear 2st, shaft 26, worm 88, worm gears 89 or 90 throughone or the other of the shafts 50, 51 and one or the other of the p1n1ons 62, 63, spur gear 64, pinion- 66 5 u v 4 7 planetary gears 67 which react on t io internal reactlon gear 68, shaft 77, and, when the clutch 85 is connected to the gears 82, 83, to

the feed operating member 12 to, drive the lat-.

terin one direction or the other at a slow or cutting speed. It will also be evident that by yarying. the application of the brake band (1 and by varying the pressure applied to the slowspeed friction clutches any suitable variants of such speed may be obtaincd'at the Wlll of the operator.

Associated withthe feed controlling fast and slow .spccdclutches for the feed oper ating member12. are improved controlling c means therefor whereby theclutchesmay be selectively applied, thus preventing simultaneous application ofthe clutches and result.- antdamage to they machine parts. Such .means for each set of clutches for the'gears comprises shipper yokes 98 and 9 1 'disposed intermediate the wormgears 14 and 89 and i 45 and 90, respectively, foreach set of clutches and these shipper members are mounted. in a manner similar to that clearly described in the above mentioned pending Holmes application, on hub members 95 and96. The hub member 95 is held in non-rotative relation by'a screw 97 with respect to a sleeve member 98' journaled at its ends Within the machine frame Whilethe hub member 96 is held in non-rotative relation by a screw 99 to a shaft 100 disposed Within and coaxially with the sleeve 98,

being relatively rotatable.

the latter and the shaft 100 The sleeve 98 ha secured thereto at its outer end an operating handle 101 While the shaft 100 has secured thereto an operating inember102, the latter 102 are provided with notches 107, 108,- resp'ectively, adapted to receive the ends of the pin 105. It will herein be evident that when one of the handles 101,102 is manipulated, the interlocking pin slides into contact with the other handld thus preventing rotation of the latter until the first handle is again inits inoperative position. it will thus be evident that when one or the other of the handles 101, 102 is actuated, the clutches for one set of the fast and slow speed clutches may be selectively applied, thus rotating the feed operating member 12 in one direction at transverse horizontal axes.

be noted that at each corner'of the rear end r either a fast or a slow speed While if the other operating handle is actuated either of the other set of clutches may. be applied and the feed operating member consequently driven at either a fast or a slow speed in an opposite direction. 7 z

Cooperating with the feed operating member 1 is a continuous fleXible feeding member 109, herein in the form of a feed chain,

relative'to which the machine is adapted to move and Which flexible feeding member presents advance and receding flexible feeding portions 110, and 111, respectively, having free ends Whicha're adaptedto be eon nected toiiXed extraneous ab'utments. It will herein be noted that each side of the forward end of the machine frame 2is provided With an adjustable SWlIlgfiTll'l 112 and disposed. at

either side of the rear end of the machine frame are guide sheaves 118 rotatable-on It will further ofthe machine frame are sets of coaxially disposed guide sprockets 11 1, 115 and 116',

11. 'journale'd on vertical aXes Within proiecting bosses 118 formed integral with the detachable frame section 11 and these guide sheaves are disposed in horizontal planes substaiitially tangential to the exterior periphery of the feed operating member 12. From the foregoing it Will be seen that the advance portion 110 of thefee'dchain 109 may be eX-- tended from the left hand rib, if the ma chine is cutting from right to left, around the swing arm 112 and then rearwardly along the advancing side ofthe machine front rame over the guide sheave 113' around the lower guide sprocket 115 upwardly around the feed operating member 12, the. chain then passing rearvvardly around the upper guide sheave 11 1 and transversely and laterally from the receding end of the machine to the right hand rib of the coal. noted that When the inachineis cutting from left to right the feed chain mayv be rearranged with respect to the guiding sprockets and the feed operating member and the controlling V handles 101, 102 and 38 may be detached and transferred to the opposite side of the machine, it being understood that the cutter bits are turned in their respective links and the motor reversed at that time.

Under certain conditions it is desirable for the cutter bar to operate in a plane at a substantial distance above the bottom surface of the mine, for instance when it is desired It Will herein be to cut out'adirto'r slate band betvveen the s ains of the coal. Under suchconditions the machine is enabled Without cliange to be bo'dis 1 inverted, the upper plane surface 4 as shown in Fig. 2 being disposed upon the mine bottom at that time as clearly described in T b 15,615 mentioned above."

In the form of my invention shown in Fi s.

the pendin Holmes application 'Ser. No.

10 and 11 it will herein be observed that t e chain engagin feed operating member 12 has been removed from the shaft 7 7 and replaced by a ropeiwinding drum 120 upon which a suitable continuous Wire rope-or cable 121 is adapted to be Wound, this wire rope forming separate advance and receding feeding portions for the machine. It Will also be observed that the guide sprockets at the front and rear end of the machine frame are replaced by suitable rolls or pulleys 122. This form of my machine operates substantially in the same manner as the feed chain form h-eretofore de'scribed with the eXception that the drum 1201s in the form of a snubbing post, the friction of thecable' on the drum P9111111:

ting the shortening and lengthening of the feeding portions.

I In the operation of my improved mining machine it Will herein be notedthat the 111i' chine is transported in any suitable manner to the coal face-herein preferably by'a transport truck driven by the driving member 86 (see F 9) One of the other of the flexible feeding portions 110, 111 is then extended to, a stationary abutment or roof ad: in advance ,of the machine and the desired feed com-r01 ling clutch is operated, rotating the feed operating member at either a'fast or a slow 0 speed in the desired direction, thus moving the mining machinealong the mine bottom June 30, 1925.

111 is then connected adj acent the right hand rib of the coal, if the machine is cutting from right to left, to a suitable jack or take-up device, while the advancing portion 110 is extended laterally from the front guide sheave 112 at the advancing side of the machine to a suitable jack or take-up device disposed adjacent the face at the left hand rib of the coal. The cutter chain sprocket 27 is then connected in driving relation with the'motor 10, thus causing the cutter chain 9 to be rapidly circulated about the cutter bar 8. The friction clutch controlling'the slowspeed worm gear 90 is then applied and the machine is fed relative to t-hereceding flexible portion 111 and the bar fed or sumped into the face of the coal at a slow or cutting speed. Any suitable device may be employed for maintaining a. predetermined length of the advancing portion 110 between the swing by Letters Patent isz arm 112and the anchor jack, for instance a device similar to that described 111 a pending application of Morris P. Holmes. Ser. No.

608,558, filed Dec. 22, 1922. After the sumping out has been made the friction clutch controlling the gear 90 is released and the friction clutch controlling the gear 89 applied, thus causing the machine to be fed relative to the advancing portion 110 of the chain to be wound in, consequently causing the forward end of the machine to be swung laterally and bringing the cutter bar to a point substantially perpendicular to the face ofthe coal, it being understood that any suitable device may be utilized for controlling the slack of the receding portion 111 on the chain at that time, for instance a chain hook n'1em 'ber similar to that disclosed in'a U. S. patent to Morris P. Holmes, No. 1,544,067, patented The machine is then fed transversely across the face relative to the advance portion 110 of the chain at a slow or cutting speed by means of the feed operating member 12 under control of the slow speed clutch. If it is desired to angle the cutter bar during the transverse cut, the feed operating member 12 may be momentarily reversed drawing in the receding portion 111 at the desired speed. At the end of the transverse cut the machine is angled and withdrawn from the face in a well knownmanner. After the cutting operation is com-' 'pleted the machine may be moved over the mine bottom at a fast speed under control of one or the otherof the clutches within the gears 44, 15, the feed operating member 12 drawing in either the advance portion 110 or the receding portion 111 of the chain at a fast speed at that time. 7

The operation of the wire rope form of the machine shown in Figs. 10 and 11' is sub etantially the same as the chain form her tofore described with the exception'that a cable is utilized and the advance and reced- 7 ing portions of the cable are drawn in by a winding drum. The operation of both forms ofmy 'machine when utilized as an overcutter issubstantiallythe same as the operation of the machinewhen used as'an undercutter with the exception'that the machine is bodily inverted with the cutter bar disposed at a substantial distance above the mine bottom. Other operations and advantages of my invention will be clearly apparent to those skilled in the art. 3

While I havein t-hisapplication specifically described two forms which'my inven-; tion may assume in practice, it will be under-' stood that these forms of the same are shown for purposes of illustration and that the invention may be modified and embodied in' various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure #1. In a mining machine, amotor', and feeding means driven thereby comprising a plurality of worm gears rotatable on parallel axes, and a feed operating member adapted'to be selectively driven by said gears and to cooperate dlrectly with flexible feeding means to eli'ect feeding. a

2.. In a mining'machine, a motor, and feeding means driven'thereby comprising a plurality of worm gears rotatable on parallel tive while the'motorrotates in the same di-' rection to drive said element at a plurality of predetermined speeds and at each of said speeds in opposite directions, and a feed operating member adapted to'cooperatedirectly with flexible feeding means 3 and driven by said element rotatable on a longitudinally extending horizontal axis and having a truck driving member coaxial therewith.

4. In a mining machine, a motor, and feeding means driven thereby comprising a ternal transmission element adapted to be driven, while said motor rotates in the same direction, at-aplurality of speeds and at each of said speeds in opposite directions, said ele ment being rotatable on a longitudinally extending horizontal axis, and feed operating j 'and'truck driving members coaxial with and driven at will by said element, said feed operating member being adapted to cooper ate directly with flexible feeding means.

. 5. In a mining machine, a motor, andlfeeding means driven thereby omprising a piecrating member adapted to cooperate directly .with flexible feeding means and rotatable on an axis parallel with said worm-gears and .v adapted to be selectively driven by said gears.

y parallel with the axes of said clutches and driven there 6. In a mining machine, a motor, and feeding means driven therel y comprising a plurality of speed varying clutches arranged on spaced parallel axes and adapted with said motor rotating inbut one direction to drive a transmission element different predetermined speeds in one direction, and a feed op erating member adapted to cooperate directl'iexible feeding means and rotatable on an a parallel with and between the axes of said clutches and driven thereby.

7. In a mining machine, a motor, and feed ing means driven thereby comprising a plurality of'cliitches adapt-ed with said motor rotatin'g in but one direction to drive a terminal transmission element at different predetermined speeds in one dilGCtiOD, a plurality of clutches fordriving said elem nt at differ- 'ent predetermined speeds in an opposite direction, a terminal element, all of said clutches having their axes parallel to a single straight line and each arranged to transmit drive to said terminal element independently of all the others, and a feed operating memoer adapted to cooperate directly with flexible feeding means and rotatable on an axis driven. by said terminal-element.

8. In a'mining machine, a motor, and feeding means driven thereby comprising a plurality of worms, a frictionally controlled planetary gearing driven thereby and including a reaction gear which is stationary at maximum driving speed and has operatorcontrollable,releasable braking means, and a feed operating member driven by said gear; ing and adapted to cooperate directly with flexible feeding means.

9. In a mining machine, a motor, and feeding means driven thereby comprising a pluralityof worms rotatable on vertical axes, a frictiona'lly controlled planetary gearing by and including a reaction gear which is .tionai'y at maximum driving speed and has Ope1fttOF-GOIltlOlltblG, releasable braking means, and a feed operating member driven by said gearing and adapted to cooperate directly with flexible feeding means.

' 10; In a mining machine, a motor, and feeding means driven thereby comprising a friction'ally controlled planetary gearing disposed on a horizontal longitudinally extend ing-axis' and including a reaction gear which is stationary lat-maxii'num driving speed and has operatoreco ntrollable, releasable brealc ing means, and a feed operating member disposed coaxially therewith and driven thereby and adapted to cooperate directly with flexible feeding means. i

11. In a mining machine, a motor, and feeding means driven by said motor comprising a terminal transmission element, four separate clutches each operative to drive said element \Vfille all the others are inoperative and respectively operative to drive the termi' nal transmission element at a predetermined speed in one direction, at a different predetcrinined speed inthe same direction, ata predeterin' ied speed in the on site direction, and at a different pre-detei member adapted to cooperate directly with flexible feeding means, and a clutch for connecting said member and said element.

12. In a mining machine, motor, feeding means driven by said motor comprising a terminal transm sio i' element, four separate clutches fordriving the terminal transmission inined speed 7 in said opposite direction, a feed operating I tire, one of said clutches effecting drive necting said clutches each by itself to drive sa d element, a feed operating member adapted to cooperate directly with flexible feeding means and driven by said element,.and a truck driving memberrotatable bysaid element.

ing a terminal transmission element, four separate clutches for driving the terminal transmission elenient, each being operative to effect drive of said element While all the,others are inoperative, one of said clutches effectdrive of said element ata predetermined. speed in one direction, another drive'of said element at a different predetermined speed in be same direction, the third drive of said element at a predetermined speed in the opposite direction, and the fourth drive of said element at a different predetermined speed in said opposite direction, means including interlocking mechanism for selectively GOD? nectingsaid clutches singly to said element,

13. In a mining machine, a motor, and feed ng means driven by said motor comprismeans and rotatable on an axis parallel with the axis of said gears and adapted to be selec tively driven thereby.

15. In a mining machine, a motor, and

opposite directions at each speed, a friction ally controlled planetary gearing driven by said element, and feed operating member driven by said gearing and adapted to cooperate directly with flexible feeding means.

l6. In a mining machine, a motor, and feeding means driven thereby comprising worm gears rotatabl on parallel axes, and a feed 01 crating member adapted to cooperate directly witlrflmxible feeding means to effect machine feeding and rotatable on an axis parallel with said gears and intermediate the axes of the same.

' 17. in a miningmzwhinc, a motor, and feeding means driven thereby comprising a worm rotatable on a vertical axis, and a frictionally controlled planetary gearing driven thereby and disposed on a longitudinally extending horizontal axis,'said planetary'gearing including a reaction gear which is stationary at maximum driving speed and has operatorcontrollable, releasable braking means, and a feed operating member driven by said gearing and adapted to cooperate directly with flexible feeding means. p

18. In a mining machine, a motor, and feeding means driven thereby comprising a worm rotatable on a vertical axis,and a friction controlled planetary gearing driven thereby and disposed a longitudinally extending horizontal axis, said planetar gearing including a reaction gear which is stationary at'maximum driving speed and has operator-controllable, releasable braking means, and a feed operating member adapted to cooperate directly with flexible feeding means and driven by said gearing and disposed on an axis coaxial therewith.

19. in a mining machine, a motor and a feeding means driven thereby including a plurality of worms whose axes lie in a common vertical plane, and a feed operating member adapted to cooperate directly, with flexible f eding means and rotatable on an tical plane with the axes of said Worms and selectively driven by said worms.

.21, In a mining machine, a motor and feeding means driven thereby including a plurality of worms whoseaxes lie in a common vertical plane, and a feed operating member adapted to cooperate directly with flexible feeding means and rotatable on a horizontal axis lying in the same vertical plane asthe axes of said worms and selectively driven by said worms.

In a mining machine, a motor and feeding means therefor including a plurality of worms rotating on a plurality of vertical axes,

and a feed perating member-adapted to cooperate directly with flexible'feeding means and rotating. on a horizontal axis lying in the same vertical plane v with the axes of said worms and selectively driven by said Worms. '23. in a mining machine, a motorand feed ing means driven thereby comprising a feed operating member rotatable on a longitudinally extending horizontal axis and adapted to cooperate directly with flexible feeding means, and driving means therefor, comprisa plurality of trains each having a terminal gear element individual thereto and-which rotates oppositely to the other terminal gear element while said motor rotates in but one diroctiomand a driving gear element for said feed operating member engaged directly by each of said terminal gear elements, in meshing relationr 3 24:. In a mining machine, a motor and feeding means driven thereby comprising a feed operating member rotatable on alongitudinally extending horizontal axis and adapted to cooperate directly with flexible feeding means, and driving means therefor comprising a plu'- 'rality of plural speed transmission trains each having a terminal gear element individual thereto rotatable at aplurality of predeten min d speeds and a driving gear element for said feedoperating member engaged directly by'each of said terminal elements in meshing relation. I p i 25. In a mining machine, av motor and feeding means driven thereby comprising a feed operating member rotatable on a longitudinally extending horizontal axis and adapted to cooperate directly with flexible feeding means, and driving means therefor comprising a plurality of speed and direction changing transmission trains each having a terminal gear element individual thereto rotatable in opposite directions and at a plurality of speeds, and a driving gear element for said feed operating member engaged directly by each of said terminal elements inv meshing relation.

26. In a mining machine, amachine frame slidable on its bottom on the mine bottom, a motor carried thereby, and machine feeding n'iechanism driven by said motor including a feed operating member adapted to cooperate with flexible feeding means, and plural speed driving means therefor including coaxial fast and slow speed worm gears rotatable on axes; parallel with the axis of said feed operating With flexible feedin means and vlural saeed t) I v drivingmeans therefor including coaxial fast and slow speed Worm gears rotatable on axes parallel with the axis of said "feed operating member and selectively operable to drive said feed operating member at fast and slow speeds, and orms rotating on parallel axes and meshing With said Worm gears. I

28 In a mining machine, a machine frame slidable on its bottom on the mine bottom, a motor carried thereby, and machine f mechanism driven b said motor inch; feed operating member adapted to cooper with flexible feeding means,and plural speed driving means therefor including coaxial fast and slow speed Worm gears rotatable on axes parallel With the axis of said feed operating member and selectively operable to drive said feed operating member at f st and slow speeds, Worms rotating on parallel axes and meshing With said Worm gears, and intermeshinggearing connecting said Worms for simultaneous rotation.

2,9 In a mining machine, a machine frame slidable on its bottom on the mine bottom. a motor carried thereby, and machine feeding mechanism driven by said motor including a feed operating member rotatable upon an axis lying in the central longitudinal vertical lane of the machine and adapted to coperate with flexible feeding means, and plural speed driving means therefor including coaxial fast and slow speed Worm gears selectively operable to drive said feed opera'ting'men'lber at fast and slow speeds.

80. In ainining machine, a machine frame slidable on its bottom on the mine bottom, a motor carried thereby, and machine feeding meclianisin driven by said motor including a member rotatable upon an slidable on its bottom on the mine bottom, a

motor carried th reby, and machine feeding mechanism driven by said motor including a feed operating member rotatable upon an axis lying in the central longitudinal vertical ie of the chine and adapted to cooperate with flexible feeding means, and plural speed driving means therefor including coaxial fast and slowv speed Worm gears rotatable on axes parallel with the axis of said feed operating men'iber, a driving element coaxial With said Worm gears and operatively connected to said feed operating member, and friction clutches coaxial with said Worm gears and operative to selectively connect said Worm gears in operative driving relation With said driving element to effect rotation of said'feed operating member at either a fast or a slow speed.

In testimony whereof I afiix my slgnature.

CHARLES F. oseoon.

GERTEFECATE 0F GORRECTIQN.

Patent No. 1,704,671. Granted March 5, 1929, to

CHARLES F. OSGQQD.

It is hereby certified that errer appears in the printed specification of the above numbered patent requiring correction as follows: Page 4, line 123, for the word "of" first occurrence, read "or"; page 5, line 116, claim 4, for the syllable "ter-" read "termi-"; page 6, line 83, claim 12, before the word "motor" insert the article "a"; page 7, line 6, claim 15, after the Word "driven", and line 7, after the word "direction" insert a comma; same page, line 118, cleimZS, after the word "speeds" strike out the comma; page 8, line 38, claim 29, for the misspelled word "coperate" reed "eeeperated; and that the said Letters Patent should be read with these correction-s therein that the same may conform to the record of the case in the Patent fiftice.

Signed and sealed this 9th day of April, A. l). 1929.

M. J. Moore,

(Seal) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. 1,704, 671. Granted March 5, 1929, to

It is hereby certified that the Certificate of Correction issued April 9, 1929, was erroneously drawn as to the misspelled word "coperate" in claim 29, and that this Certificate should have read as follows: Page 8, line 38, claim 29, for the misspelled word "coperate" read "cooperate", that the said Certificate may conform to the records of the office.

Signed and sealed this 30th day of April, A. D. 1929.

M J. Moore,

eal) Acting Commissioner of Patents.

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