US1875338A - Mining machine - Google Patents

Description

Sept. 6, 1932. M. P. HOLMES MINING MACHINE Filed Dec 30, 1929 3 Sheets-Sheet l %N MY W w ow Sept. 6, 1932. M. P. HOLMES 1,375,338

MINING MACHINE Filed Dec. 50, 1929 s sheets-she t 2 Sept. 6, 1932. M. P. HOLMES 1,875,338

MINING MACHINE Filed Dec. 30, 1929 5 Sheets-Sheet 3 H a"; F. 6 74' H fl '21 ILUJI l ll .1. 6:9

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Patented Sept. 6, 1932 ii-re STATES PATENT OFFICE;

' M'OERZS P. HGLMES, F CLAREMONT, NEW HAMPSHIRE, ASSIGNOR T0 SULLIVAN MA- CHINERY COIEPANY, A CORPORATION OF, MASSACHUSETTS MINING MACHINE Application filed. December 30,1929. Serial No. 417,329.

This invention relates to improvements in mining machines-and more particularly has reference to improved flexible feeding means for a coal mining machine of the continuous cutter, bottom cutting type.

An object of this invention is to provide an improved coal mining machine. Another object is to provide an improved coal mining machine of the flexibly fed, bottom cutting type. A further object is to provide an improved feeding mechanism for a coal mining machine. Another object of this invention is to provide an improved coal mining machine of the flexibly fed, continuous cutter, bottom cutting type having improved feeding and guiding mechanism and more particularly improved feeding and guiding mechanism for a room and pillar type coal mining machine. Yet another object is to provide an improved bottom cutting mining imachine'of the room'and pillar type having improved feeding and guiding mechanism wherein separate relatively rotatable feed operating and controlling members cooperating with separate flexible feeding elements are employed for feeding and guiding the machine. Another object is to provide in a flexible feeding means of the aforesaidcharactor, improved driving and controlling means for the feed operating members whereby the latter may be separately or simultan ously driven in a direction ,to draw in their respective flexible feeding elements at relatively low speed or at relatively high speed. A further object is to provide in such a feeding means, improved mechanism whereby the feed operating members may rotate in a direct-ion to pay out their respective flexible feeding elements under various degrees of operator-controlled frictional resistance or without .such resistance, as conditions may require. Still another object is to provide in such a feeding means improved mechanism s iincludina a frictionally controlled fastspeed gear train and a frictionally cont-rolled slow speed gear train, and means for connecting either of said members to either train where by said members may be rotated independentlv in Winding direction at either a relatively high speed or a relatively low speed,

the said gear trains being common to the drive of both members. These and other objects and advantages of'this invention will, however subsequently more fully appear.

.In the accompanying drawings there is shown for purposes of illustration, one em bodiment which the invention may assume in practice.

In these drawings,

v Fig. 1 is a plan view of a coal mining machine havingembodied therein't-he illustrative form of the improved flexible feed ing means. I

Fig. 2 is a side elevational view of the machine shown in Fig. 1.

Fig.3 is an enlarged horizontal sectional view taken substantially on line 3-3 of F ig. 2.

Fig. 4 is a longitudinally extending vertical sectional view taken substantially on line 4 4 of Figs. 1 and 3.

Fig. 5 is a longitudinally extending vertical sectional view taken substantially on line 55 of Fig. 3. I

Fig.6 is a detailed view, parts being shown in section, illustrating the controlling mechshown a coal mining machine of the flexibly fed; room and pillar,-bottom cutting type,

althoughit is within the scope ofthis inven' tion to apply the various novel features of the invention in coal mining machines of various other types. This mining machine generally comprises a low compact machine frame 1 of generally rectangular shape having a plane bottom surface 2 upon which the machine is slidably supported for movement over the mine bottom. As is usual in mining machines of the room and pillar type. rigidly secured within the machine frame and projecting forwardly lengthwise therefrom is an elongated plane cutter bar 3 supporting on its outer edges an endless cutter chain 4 having usual staggered cutter bits 5. Arranged at opposite sides of the machine frame'at the rear end of the machine are relatively ro-- bers 6 and 7 herein in the form of cable winding drums, with which feeding and controlling cables 8 and 9 respectively cooperate.

'Carried by the machine frame is a motor 10 which may be of the same general character.

as that disclosed in my copending applica tion Ser. No. 179,357, filed March 29, 1927, patented July 21, 1931, Patent No. 1,815,873. The feed operating and controlling members 6 and 7 are operatively connected to the rear end of the motor shaft through improved transmission means to be hereinafter described. Arranged at the opposite rear corners of the machine framecn upstanding axesare guide sheaves 12, 13, 14 and 15,.the guide sheaves 14 and 15 being horizontally swingable into difierent positions, while arranged at the opposite sides of the front end of the machine frame are vertically swingable swing arms supporting guide sheaves 16 and 17. The feed-and controlling cables 8 and 9 after passing around any preferred guide sheaves may be extended in any preferred direction from the machine and attached to suitably positioned anchors in the manner which is well understood in the mining machine art.

Now referring to the improved feeding mechanism, and more particularly to the improved transmission means, it will be noted that secured to the rear end of the motor shaft 11 as shown in Fig, 4 is a spur pinion 18 meshing with an internal gear 19 secured to a horizontal longitudinally extending shaft20 suitably journaled within the machine frame and having fixed thereto a bevel pinion 21 meshing with bevel gear 22 secured to a vertical shaft 23. This shaft is suitably journaled within the machine frame ner discs of these clutches are carried by hollowshafts or sleeves 3l and 32 respectively, rotatably supported on the shaft 26 at opposite sides of the worm wheel 25. Carried by the sleeve 3l is a spur pinion 33 meshing with a spur gear 34 fixed to a transverse horizontal shaft 35 arranged parallel wit in front of the shaft 26 and likewise suitably ournaled within the machine frame; Fixer to the shaft 35 is a spur pinion 36 meshing with an internal gear 37 carried by then-ind n and I ing drum 7 In the same manner the sleeve 32 carries a spur pinion 38 meshing with a spur gear 39 fixed to a transverse horizontal shaft 40, alined with the shaft 35 above referred to, and arranged at the opposite side of the machine. Secured to the shaft 40 is a spur pinion 41 meshing with an internal gear 42 carried by the winding drum 6. It will thus be seen that upon application of the friction clutch .29 the winding drum 7 may be driven from the motor in winding direction at a relatively high speed through the gearing 18, 19, 21, 22, vertical shaft 23, worm gearing 24, 25, shaft 31, spur gearing 33, 34,

shaft'35 and spur pinion 36 meshing with internal gear 37 carried by the drum. It will also be noted that when friction clutch 30 applied, the winding drum 6 may be driven from the motor in winding direction at a similar speed through a similar gear train, the gear train including gearing 18,19, 21, 22, 23, 24, 25, being common to the drive of both the winding drums to effect rotation thereof throughtheir respective reduction gearings either separately or simultaneously in. winding direction at a relatively high speed. The operating means for the friction cl itches 29, 30. will be hereinafter described.

The transmission means for effecting rotation of the winding drums in winding direction at relatively low speed includes a spur gear 43 (see Fig. 4) formed integral with the bevel gear 22 and likewise secured to the vertical shaft 23 and driving through idler gears 44 and 45, ournaled on upstanding studs 46 carried by the bottom of themachine frame, a spur gear 47. As shown in Fig. 5, the spur gear 47 is fixed to the lower end of a vertical shaft 48 suitably journaled within the machine frame and having fixed thereto intermediate its ends, a worm 49 meshing with a slow speed worm wheel 50. The hub of this worm wheel, as shown in Fig. 3, is fixed to the transverse shaft 26 and is connectible by a multiple disc clutch 51 to the sleeve 32. In the illustrative construction shown, secured to the opposite end of the shaft 26 is a clutch housing 52 carrying the outer discs of a multiple disc clutch 53,. the inner discs of this clutch being carried by the sleeve 31. It will thus be seen that when the clutch 29 is released andthe clutch 53applied, the winding drum 7 may be driven from the motor in winding direction at relatively low speed through gearing 18, 19, 21, 22, 43, 44, 45, 47, worm gearing 49, 50, trans-- verse shaft 26, sleeve 31, spur gearing 33,34, and the spur pinion 36 meshing with the in ternal gear 37 carried by the winding drum 7. It will also be noted that when the friction clutch 30 is released and the clutch 51 applied, the winding drum 6 maybe driven from the motor at a similar speed in a similar direction through gearing 18, 19, 21, 22, 43, 44, 45, 47, worm gearing 49, 50, sleeve 32, spur gearing 38, 39 and spur pinion 41 meshing with the internal gear 42 carried by the Winding drum 6. It will be noted that the slow speed gear train 18, 19, 21, 22, 43, 44, 45, 47, '48 and $50 is common to the drive of both the winding drums. It will also be seen that the friction clutches may be suficiently released to per mit the cable to unwind from the drums under various degrees of frictional resistance under the control of the clutch operating mechanism. Upon release of the friction clutches the drums may be entirely relieved from any frictional resistance due to the action of the friction clutches. The operating mechanism for the clutches 51 and 53 will be later described. It will be observed that the winding drums 6 and 7 are arrangedon horizontal axes extendingtransversely of and at opposite sides of the machine and each drum is journaled on a laterally projecting stub shaft 54 formed integrai'with a plate 55 detachably secured to the side wall of the machine frame. Each drum has formed centrally therein a dust proof chamber 56 in which the bearing structure is housed.

The operating mechanism for the sets of friction clutches 29, 53, and 30, 51 will now be described. Inter-posed between the clutches 29, 53 and straddling the shaft 31 is a shipper yoke 57 pivoted at 58 on the machine frame. This shipper yoke is provided at opposite sides thereof with curved portions 59 engaging the pressure plates for the clutches respectively. Engaging the pressure plates for the friction clutches 30 and 51is a similar shipper yoke 60 pivoted at 61 on the machine frame. The shipper yokes have integral projecting lever portions or arms 62 (see'Fig. 7 bifurcated at theirouter ends-for connection to trunnions 63 and 64 respectively. Each of the trunnions is in the form of a nut threadedly connected-to screws 65 and 66 re spectively. The screw 65 is formed on a rotatable sleeve 67 rotat'ably supported within .theside of the machine frame and carrying at its outer end a toothed clutch member 68. A similar rotatable sleeve 69 is secured to the screw 66 and is likewise journaled within the A" machine frame and carries a similar toothed clutch member 70. Extending axially through these sleeves is an operating rod 71 having keyed to its opposite ends toothed clutch members in the form of hand wheels 72, 73. A suitable plunger and groove connection 74 is employed for holding the rod 71 in its adjusted positions. It will thus be seen that when the hand wheel 72 is slid inwardly to connect the clutch teeth thereon with the clutch teeth on the member '68 and the hand wheel is rotated, the screw 67 is retated and as a result the shipper yoke is swung about its pivot to apply one or the other of the friction clutches 29 and 53. When the rod 71 is slid in the opposite direction connecting the clutch teeth on the member 73 with the clutch teeth on the member and the rod is It will therefore be evident that the clutches of each set may be only alternatively applied and that the clutches may be controlled by the hand wheels 72, 7 3 from either side of the machine. v

The mining machine is adapted to be mounted on a self-propelled truck .during transport of the machine about the mine and mechanism is provided on the machine for driving the truck wheels. This truck driving mechanism includes a spur gear 7 5 meshing, as shownv in Fig.4, with the spur gear 44 of the slow speed gear train of the feeding mechanism. This spur gear 75 is fixed to a verticalshaft 76 suitably journaled within the machine frame and secured to the upper end of this shaft is a spur gear 77 projecting through an opening in the frame and adapted to mesh With a usual driving gear (not shown) carried on the truck. When the machine is mounted on the truck with the gear 77 in mesh with the truck driving gear, the truck wheels may be driven from the motor through the gearing 18, 19, 21, 22, 43, 44, 75, vertical shaft 76 and spur gear 77. Various modes of operation of the improved machine will be clearly apparent to those skilled in the art and as the method of use of a room and pillar mining machine is Well known, further description of the operation of the machine is thought unnecessary.

lVhile there is in this application specifically described one form which the invention may assume in practice, it will be understood that this form of the sameis 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 by Letters Patent is:

1. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or-simultaneously in adirection to draw in their respective flexible feeding means at relatively high speed or at relatively low speed, said means being operative to effect drive of one member at a low speed While the other member is simultaneously driven at a high speed and having-embodied therein a slow spe ed driving mechanism in eluding a final slow speed driving element, a fast speed driving mechanism including a final fast speed driving element, and friction controlling clutches for said mechanisms respectively, the final driving elements-0f said mechanisms being common to the drive of both members.

2. A mining machine feeding mechanism comprising relatively rotatable feed operating, and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving mecl1anism for said members for rotating the latter either separately or simultaneously in adirection to draw in their respective flexible feeding means at relatively high speed or at relatively low speed, said plural. speed mechanism having embodied therein a slow speed gear train including a final slow speed driving element, a fast speed gear train including a final fast speed driving element, said final driving elements of said gear trains being common to the drive of both members, and friction controlling clutches individual to each member, one for slow speed and one for fast speed.

3. A minin machine feeding mechanism comprising re atively rotatable feed operating and, controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving mechanism for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed, said plural speed mechanism having embodied therein a slow speed gear train including a final slow speed driving element through which both members are driven, a fast speed gear train including a final fast speed driving element through which both members are driven, and means for connecting either member in driving relation with the final driving element of either gear train at will, including friction clutches individual to each member, one for slow speed and one for fast speed.

4:. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a slow speed driving mechanism including a final slow speed driving element, a fast speed driving mechanism including a final fast speed driving element, the final driving elements of both of said mechanisms being common to the drive of both members, and frictional controlling means, including a plurality of friction clutches associated with each mechanism for connecting either member to either mechanism at will.

5. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed or to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance including a frictionally controlled slow speed driving mechanism including a final slow speed driving element and a frictionally controlled fast speed driving mechanism including a final fast speed driving element, the final driving elements of both of said mechanisms being common to the drive of both members and operative to efiect'drive of one member at a slow speed while the other member is simultaneously driven at a high speed.

6. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relative ly low speed or to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance including a frictionally controlled slow speed driving mechanism including a final slow speed driving element, a frictionally controlled fast speed driving mechanism including a final fast speed driving element, the final driving elements of both of said mechanisms being common to the drive of both members, and frictional means operable at will for connecting either member to either mechanism or for connecting one member to said slow speed mechanism while the other member is simultaneously connected to said fast speed mechanism.

7 A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed, to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional-resistance or without such resistance including a frictionally controlled slow speed driving mechanism including a final slow speed driving element and a frictionally controlled fast speed driving mechanism including a final fast speed driving element, the final driving elements of both of said mechanisms being common to the drive of both members and operative to effect drive of one member at a slow speed While the other memher is simultaneously driven at a high speed.

8. A mining machine feeding mechanism comprising relatively rotatable feed operat ing and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or simultaneouslyin a direction to draw in their respective flexible feeding means at relatively high speed or at relatively loW speed, to permit said members to rotate in a direction to pay out their respective flexible feeding means under'various degrees of frictional resistance or without such resistance including a frictionally controlled slow speed driving mechanism including a final slow speed driving element, a frictionally controlled fast speed drivingmechanism includ ing a final fast speed driving element, the final driving elements of both of said mechanisms being common to the drive of both members, and frictional means operable at will for connecting either member to either mechanism or for connecting one member to said slow speed mechanism while the other member is simultaneously connected to said fast speed mechanism. a i

9. A mining machine'feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a'plural speed driving mechanism for said members for rotating the latter in a direction to draw in their respective flexible feeding means either separately or simultaneously at relatively high speed or at relatively low speed or to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance including africtionally controlled slow speed gear train including a final slow speed driving 3 element, a frictionally controlled fast speed gear train including a final fast speed driving element, the final driving elements of both of said gear trains being common to the drive of both members, and friction controlling clutches operable at will for connecting either member to-either gear train or for.

connecting one member to said slow speed gear train While the other member 1s simultaneously connected to said fast speed geartrain. v

10. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each'adapted to cooperate directly with flexible feeding means, and a plural speed driving mecha nism for said members for rotating the latter in a direction to draw in their respective flexible feeding means either separately or simultaneously at relatively high speed or at relatively low speed, to permit saidmembers to rotate in a direction to payout their respective flexible feeding means under various degrees of frictional resistance or with out such resistance including a-frictionally controlled'slow speed gear train including a final slow speed driving element, a frictionally controlled fast speed gear train including a final fast speed driving element, the'final driving elements of both of said gear trains being common-to the drive of both members, and friction controlling clutches operable at will for connecting either member to either gear train or for connecting one member to said slow speed gear train while the other member is simultaneously connected to said fast speed gear train. I

11. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members-each adapted to cooperate directly with flexible feeding means, and a plural speed drivingmechanism for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively; low speed including a slow speed gear train having a final slow speed driving element, friction controlling clutches for connecting either member to the final driving element of said slow speedgear train, and a frictionally controlled fast speed gear train including a final fast speed driving element common to the drive of both members.

12. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving mechanism for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed or to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance including a slow speed gear train having a final slow speed'driving element, friction controlling clutches for connecting either member to the final driving element of said slow speed gear train, and a frictionally controlled fast adirection to draw in their respective flexible feeding means at relatively high speed or at relatively low speed, to permit said members to rotate in a direction to payout their respective. flexible feeding means under 'vari-' ous degrees of frictional resistance or without such resistance including a slow speed gear train having a final slow speed driving element, friction controlling clutches for connecting either member-to the final driving element of said slow speed gear train, and a frictionally controlled fast speed gear train including a final fastspeed driving element common to the drive of both members.

14;. A mining machine feeding mechanism comprising relatively rotatable feed operat ing and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving mechanism for said members including a slow speed gear train having a final slow speed driving element common to the drive of both members, a fast'speed gear train having a final fast speed. driving element common to the drive of both members, a controlling clutch for each member for connecting each memher to the final driving element of said sloav speed; gear train, and a plurality of controlling clutches one for each member for connectingeach member to the final driving element of said fast speed gear train.

15. A mining machine feeding mechanism comprising relatively rotatable feed operatand controlling members each adaptedto. cooperate directly with flexible feeding members, and a plural speed driving mechanism for said members including alincd transmission elements one connected to each member, a slow speed gear train including a terminalgear coaxial with said transmission elements, clutches for connecting said transmission elements. to. said terminal gear, a fast speed: train including terminal gear coaxial with said transmission elements, clutches. for connecting said transmission elements; in driving relation with said fast speech terminal gear;

' 16; A mining machine feedingmechanism; comprising relatively rotatable feed operat and cont olling members each adapted to cooperate directly with flexible feeding: members, and a. plural speed driving mech-. anism for said members including alined; horizontalzshaftsonc connected; to each mem her, a, slow speed gear train. including a; terminal. gear coaxial. with. said: shafts, clutches for connecting said shafts. to; said terminal gear, a fast speed gear train including; a terminal gear coaxial with said shafts, and clutches. for connecting said shafts in drivingrelation with said fast speed terminal gear.

17 A mining machine feeding-mechanism. comprisingrelatively rotatable feed operat-. ing andi controlling members each adapted to cooperate directly with flexible feeding mem.-. bers, and a. plural; speed driving mechanism forsai'd members including alinedhorizontal' shaftsextending transversely of the machine oneconnected to each member, a slow speed gear train including a terminal gear coaxial with said shafts, clutches for connecting said shafts to said terminal gear, a fast speed gear train including a terminal gear coaxial with said shafts, and clutches for connecting said shafts in driving relation with said fast speed terminal gear.

18.. A mining machine feeding mechanism comprising relatively rotatable feed operat: ing and controlling members arranged with theiraxes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and a plural speed driving mechanism for said memoers including fast and slow speed gearing includinga terminal fast speed driving element and a terminal slow speed driving element, and means for connecting said members either separately or simultaneously in drivingrelation with the terminal driving elements of said gearing to, effect independent drive of said: members at either speed or simultaneous driveat different speeds.

19%. A mining machine feeding mechanism comprising relatively rotatable feedoperating and controlling members arranged with their axes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members including a fast and slowspeed mechanism for driving said members at rela-tivel highspeed or at relatively low speed; and including a terminal fast speed; driving element and a terminal slow-speed driving element, and devicesfor connecting said members either separately or simultaneously to the terminal driving elements. ofsaid: fast and slow speed mechanism, said means being operative to effect drive of one member at a slow speed While the other member is simultaneously driven at a high speed.

20. A mining machine feeding mechanism comprising relatively rotatable fecdoperati ng and? controlling members arranged with their axes. parallel to a transverse vertical plane and; each adapted to. cooperate directly ith flexible feeding means, and a plural speed driving means for said members including a change speedv mechanism common to the drive of bothmembers, and means for connecting said: memberseitherseparately or simultaneously in driving relation with said. mechanism, said means being operative to edect dri ve of one member at one speed while the.

,other member is simultaneously driven at a different speed. 7 g

21 Al mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate: directly with flexiblefeeding means, and motor operated devices for-driving sail mcmbers'i'na; direction to draw in their re spective flexible feeding means at relatively high or relatively low speedincluding a hori- 'zontal transversely extending shaft, a fast speed gear train and a slow speed'gear train, each gear train including a gear coaxial with said shaft, connections between one of said gears and said shaft, a clutch forconnecting one of said members in driving relation with members.

22. A mining machine feeding mechanism including relatively rotatable feed operating.

and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding meansat relatively high or relatively low speed. in-

cluding a horizontal transversely extending shaft, a fast speed gear train and a slow speed gear train, each gear train including a gear coaxial with said shaft, connections between one of said gears and said shaft, a clutch for connecting one of said members in driving relation with said latter gear, a

clutch for connecting the other of saidmem bers in driving relation with said shaft, and separate driving connections between said other gear and said members including clutches one individualto each member.

23. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their r spective flexible feeding means at. relatively high or relatively low speed including alined shafts one connected to each member, a coaxial shaft, a fast speed gear train and, a slow speed gear train, clutch devices for connecting said alined shafts in driving relation A with one of said gear trains, and a separate clutch for connecting one of said members in driving relation wlth sa1d coaxlal shaft.

24. A mlning machine feedlng mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding means at I? relatively high or relatively low speed. including a transversely extending horizontal shaft, fast and slow speed gear trams each including a terminal gear coaxial with said shaft;

alined shafts coaxial with said shaft, clutch devices for connecting said alined shaftsin driving relation with one of said terminal gears, and a connection between said coaxialshaft and said other terminal gear.

25. A mining machine feeding mechanism including relatively rotatable feed operating i said gear trains including coaxial fast and controlling members each adapted to co operate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their re-' spective flexible feeding means at relatively high or relatively low speed including a trans versely extending horizontal shaft, fast and slow speed gear trains each including a terminal gear coaxial with said shaft, alined shafts coaxial with said shaft, clutch devices for connecting said alined shafts in driving relation with one of sa1d terminal gears, a con-- nection between said coaxial shaft and said other terminal gear, and clutch devices for connecting said last mentioned terminal gear in driving relation with said members respectively. 3 i. p

26. Amining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapt-ed to cooperate. directly with flexible feeding means, and motor operated devices for drivin said members in a direction to drawin their respective flexible feeding means at relatively high or relatively loW speed including a fast speed gear train and a slow speed gear train,

said gear trains including coaxial fast and slow speed terminal gear elements, clutch devices for connecting said members in driving relationwith one of said gear elements, a shaft coaxial with said elements and driven by said other gear element, a clutch for connecting one of said members to said latter gear element, and a clutch for connecting said other member to said coaxial shaft.

, 27. A mining'machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly withflexible feeding means, and motor operated devices for driving said members in a direction todraw in their respective flexible feeding means at relatively high or relatively low speed including a fast speed gear train and a slow speed gear train, said gear trains including coaxial fast and slow speed worm wheels, a shaft coaxial with said worm wheels, clutch devices for connecting said members in driving relation with one of said worm wheels, a clutch connecting said other worm wheel in driving relation with one of said members, and a clutch for connecting said other member in driving relation high or relatively low .speed including a fast speed gear train and a slow speed gear train, and slow speed worm Wheels, a shaft coaxial with said worm wheels and driven directly by one 1 high or relatively low speed including a fast speed gear train and a slow speed gear't-rain,

said gear trains including coaxial fast and slow speedworm wheels andworms rotatable on parallel axes and meshing with said worm wheels respectively, a shaft coaxial with said worm wheels, clutch devices forco'nnecting 7 said members in driving relation with one of said worm wheels, a clutch connecting said other worm wheel in driving relation with one of said members, and a clutch for connecting said other member in driving relation with said coaxial shaft. v I

30. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to co operate directly with flexible feeding means, and motor operated devices for driving said members in a tlllGClTOIl to draw in their respective flexi. le feeding means at relatively high or relatively low speed including a fast speed gear train and a slow speet gear train, said gear trains including coaxial fast and slow speed worm wheels and worms meshing with said worm wheels respectively, one of said worms rotating ona vertical axis, a

shaft coaxial with said worm wheels and driven directly by one of the latter, clutch devices for connecting said members in driving relation with one of said worm wheels, a

clutch connecting said other worm wheel. in

driving relation with one of said members, and a clutch for connecting said other memher in driving relation with said coaxial shaft.

31. A mining machine feeding mecnanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their re spective flexible feeding means at relatively high or rel tively low speed including a fast speed gear train and a slow speed gear train, said gear trains including coaxial fast and slow speed worm wheels and worms rotatable on parallel vertically extending axes and meshing with said worm wheels respectively, a shaft coaxial with said worm wheels and driven directly by one of the latter, clutch 7 devices for connecting said members in driving relation withone of said worm wheels, a

clutch connecting said other worm wheel in driving relation with one of said members, and a clutch for connecting said other member in driving relation with said coaxial shaft.

32. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding means at relativcly high or relatively low speed including a bevel gear, a worm coaxial therewith, a fast speed gear train and a slow speed gear train, one of said gear trains including a worm wheel meshing with said worm and constituting a driving element for both members, and clutch devices for connecting either member in driving relation with either gear train.

33. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding means at relatively high or relatively low speed including a bevel gear rotating about a vertical axis, a worm coaxial therewith, a fast speed gear train and a slow speed gear train, one of said gear trains including a worm wheel meshing with said worm and constituting a driving element for both members, and clutch devices for connecting either member in driving relation with either gear train.

34. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding means at relatively high or relatively low speed including a fast speed gear train and a slow speed gear train, each gear train including a worm wheel and a worm meshing therewith, said worms being arranged on parallel vertical axes, and clutch devices for connecting either member in driving relation with either worm wheel or for connecting one member to one worm wheel and the other member simultaneously to the other worm wheel. 7

35. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members each adapted to cooperatedirectly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding means at relatively high or relatively low speed including a fast speed gear train and a slow speed gear train each gear train including a worm wheel and a worm meshing therewith, said worm wheels being coaxially arranged and said wor'msbeing arranged on parallel vertical axes, and

wheel and the'other member simultaneously members ina direction to draw in their respective flexible feeding means at relatively high or relatively low speed including a bevel gear, a worm coaxial therewith and driven thereby, a worm rotat ng on a paral- 'lel axis, driving connections between said bevel gear and said last mentioned worm,

worm wheelsmeshingwith said worms respectively, and clutch devices for connect ing either member in driving relation with either worm wheel." 1 v 37. Almining machine feeding mechanism including relatively rotatable feed operating,

and controllingmembers each adapted to cooperate directly with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feeding meansat relatively high or relatively low speed including a bevel gear rotating on a vertical axis, a'worm coaxial therewith and driven thereby, a Worm rotating on a parallel axis,-drivin'g'connections between said bevel gear andsaid'last mentioned worm, worm wheels meshing "with said worms respectively, and clutch devices for connecting either member in drivingrelation with. either worm wheel.

a 38. A mining machine feeding mechanism including relatively rotatable feed operating and controlling members eachadapted to cooperate directly'with flexible feeding means, and motor operated devices for driving said members in a direction to draw in their respective flexible feedingmeans at relatively high or relatively low speed including a motor driven gear,-a worm coaxial therewith and driven thereby, ta worm rotating on an axis parallel with said worm, driving connections between said last mentioned worm and said motor driven gear, worm wheels meshing with said worms respectively, and clutch devices for connecting either member in driving relation with either worm wheel or for connecting one member to one worm wheel and the other member simulta neously to the. otherwormwheel.

39. A mining machine feeding mechanism ii'icluding relatively rotatable feed operating and controlling memberseach adapted to cooperate directly'with flexible feeding means, and motor operated. devices for driving said members in a direction to draw in their respective flexible feeding means at relatively high or relatively low speed including a motor driven gear rotating about a vertical axis, a worm coaxial therewith and driven thereby, a worm rotating on a parallel ax s, driving connectlons between said last mentioned worm and said motor driven gear,

worm wheels meshing with said worms respectively, and clutch devices for connecting either member in driving relation with either worm wheel or for connecting one member to one worm wheel and the other member s1- "multaneously to the other worm wheel. Y

40'. A mining machine feeding mechanism including rela'tively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feedin means,

and motor operated. devices for driving said members "in a direction to draw in then respective'flexible feeding means at relatively high'or relatively low speed including a fast speed gear train and a slow speed gear train, said gear trains including coaxial fast and slow speed terminal elements, a shaft coaxial with said elements, oneof-said terminal elements being connected to one end of said shaft, connections betweenthe op'positeend of said shaft and one of said members, and driving connections between said other terminal element and both of said members, therev being clutch devices' for connecting either member in driving'relation with either I terminal element.

1 4L A mining machine feeding mechanism includingrelatively rotatable feed operating andicontrolling members each adapted to cooperate directly with flexible feeding means,

and motor operated devices for driving said members in a direction to draw in their respective flexible feeding means at relatively high or relatively low speed including aTfast speed gear train and a slow speed gear train, said gear trains includingc'oaxial fast'and slow'sp'eed terminal gears, a shaft coaxial witlfsaidgearsand to'which one of said gears is secured, a clutch for connecting one of said members indrivingrelation with said gear secured 'tosaid shaft, a clutchfor con necting said other member in driving relation with'said shaft and connected. to the latter at the opposite end thereof, andiclutch devices for connecting said members in driving relation with said other terminal gear;

42. Am'ining machine feeding mechanism including relatively rotatable feed operating and 'controllingmembers each adapted to cooperate. directly with flexible feeding means, and motor operated devices for rotating said members either separately or simultaneously in a direction to draw in their respective flexible feeding means 7 at relatively high speed or at relatively low speed including a fastspeed gear train and a slow speed gear train, each gear train including a'terminal gear element, clutch devices one individual to each member for connecting said members to said slow speed terminal gear element, and

iclutchidevices one individual to each member ice fol-connecting. either member in driving relation w th c said; fast speed terminal gear element. r 43. A mining machine feeding mechanlsm comprising relatively rotatable feed operating and" controlling members arranged on operative: to' effect drive of one-member at a slow; speed while the other member is simulgtaneously driven -;at=a, high speed. 4433A: miningginachinefeeding mechanism comprising; relatively, rotatable feed operating; andtcontmlling} members arrangedj on axesrparalleli to a; transverse: vertical plane land each; adapted; to cooperate directly: with fliexible-i teeding means, and a pluralr speed drivingzimeohanism; for; said: members for rotating; the-latter either separatelyger simulataneeusly, ,ima: direction: to draw in: their" respective flexible feeding memistatzrelattvely highispeed or at relatively low, speedinclndingnaslow speed gear train, a fast speed gearitrain, andmeans operable at will for connecting either member to either gear train on; to) connect one :member to one gear: train whilee the other: member is simultaneously connected to the-other gear train. a 5L5;- Aumining machine:feed-'ngmeehanism comprisingig-relatively rotatable; feed; operating and oontrollingymembersarranged on aXes: paral-lel to aitransverse vertical; plane and eachtadapted to"cooperate directly with flexible :feeding: means, i and a' plural speed drivingmeans for; :saidmembers for rotating thedatter either rsepara-telyor simultaneously inardirection to drawin their respective flex.- ible feeding means at relatively high; speed orzrelatively low speed including :a slow speed driving mechanism; a, speed; driving mechanism, .saidmechanisms being'i common to the (lIleVQ 0:5 'bothzmembers, and frictional controlling.mcans.including; a) plurality of frictioniclutchesassociated with each mechanism-for; connecting either member to :either meclrmrismzatwill-v 1 416%:A1 mining: machine feeding mechanism comprising: relatively rotatable feed; operatand controlling, members arranged on axes paralleltto awtransverse vertical plane each adapted i to cooperate directly with flexiblefeeding:1neans-, and a? phiral speed driringmeans fort-said members for: rotating :thefl-atter i either'separately :orsimultaneously in a .directionzto draw. in theirrespective :flex

01" at relatively low speed or to permit said members to rotate ina direction to pay out their respective flexible feeding means under {variousdegrees a of frictional resistance including a frictionally controlled slowspeed drivingamechanism, and a frictionally' controlled fast speed; driving mechanism, said mechanisms being. common" to the drive of bothmembersandioporative toeifect drive of one member atas-lowspeed while the other member is simultaneously driven at a fast speed.

&7; A: mining-machine feeding mechanism comprising relatively rotatable feed operat- .ing;and i controlling members arranged f on axes parallel toral transverse vertical plane and cachiad'apted to cooperate directly with flexible feeding means, and a: plural speed driving. means-for said: members for rotating the-flatten either'separately or simultaneously in a direction to draw in their respectiveilexiblefeedin g means-at relatively high speed or at. relatively- ;l'ow speed o'r to permitsaid membersto rotate in: a direction to pay out their respsctivewfieX-i-ble feedingmeans under various degrees of frictional: resistance including a-:=fr-.ictionally controlled slow speed driving: mechanism, a frictionally. controlled fast speed; driv-ing mechanism; said mecha nisms being coinmon to .the'wdrive of both members, 2 and frictional: means operable at will tor connecting either member to: either mechanismor tore connecting one :member to one; mechanismrwhile-tm other member is simultaneously oonnectedto the other mechanlsmiz 48. A miningmachine feedingmechanism comprising relatively notatablevfeed operating-rand.) con-trolling: members arranged on axes "parallel; to: a transverse vertical plane and;each adaptedl to cooperate directly with flexible feeding means, and plural speed drivingzmechanismifon said members for rotatingthe lattenin'a 'dia'eetion'ito draw in their respective flexible: feeding means. eith s? parately; or simultaneously at relatively high speed or'at relatively low speed; or'to zperni it said membersztoirotate inadirection to pay one theimiespective i flexible? feedin means under various degrees-of frictional resistance including mfrictionally control'ledislew speed gennftra'i n; in friction'ailly controlled fast sp ecd geaezrtrain, said! gearftrains being common to the d rive oftboth members; an d tri ction controlling clntohessoperabletat wi'llifor. connecti ing either memberi-to' either'gear trainer for connecting one member to one gear train :wliile: the;0tl1er"member is simultaneously connected to the other geartrain;

rib, A1 mining; machine feeding mechanism comprising relati'vely rotatable feed operating'land controlling member-sarrangcd on axes parallel to: a: transverse vertical plane and .eazcliwaidaptedato cooperate directly with e-ihlei-feeding meansjatirelativelyhighs speed flexible feeding meansyand a plural speed driving mechanism for said membersfor rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a slow speed gear train, friction controlling clutches, one forconnecting each member to said slow speed gear train, and a frictionally controlled fast speed gear train common to the driveof both members.

50. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members arranged on axes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and a plural vspeed. driving mechanism for said members forrotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively slow speed er to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional re sistance including a slow speed gear train, friction controlling clutches, one for connecting each member to saidslow speed gear train, and a frictionally controlled fast speed gear train common tothe drive of both members. I g

51. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members arranged on axes parallel to a transverse vertical plane and each adapted to cooperate directly with flexible feeding means, and a plural speed driving mechanism for said members including a slow speed gear train common to the drive of both members, a fast speed gear train common to the drive of both members, a controlling clutch for each member for connecting each member to said slow speed gear train, and a plurality of controlling clutches one for each member for connecting each member to said fast speed gear train.

52. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a slow speed driving mechanism, afast speed driving mech anism, said mechanisms including coaxial terminal elements common to the drive of both members, and frictional controlling means including a plurality of friction clutches associated with each mechanism for connecting either member to either mechanism at will. 7 I p 53. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members eachadapted to cooperate directly with flexible feeding means, and. a plural speed driving means for said members for rotating the latter either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed orto permit said members to ro tate in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance, said means being operative to effect drive of one member. at one speed and the other member simultaneously at the other speed and including a frictionally controlled slow speed driving mechanism and a frictionally controlled fast speed oriv ing mechanism, said mechanisms including coaxial terminal elements common to the drive of both members. I

54. A mining machine feeding.mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving means for said members for rotating the latter either I separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed or to permit said members to rotate in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance, saidmeans being operative to effect drive of. one'member at one speed and the other member simultanously at the other speed, and including a frictionally controlled slow speed driving mechanism, a frictionally controlled fast speed driving mechanism, said mechanisms including coaxial terminal elements common to the drive of both members, and frictional means for connecting either member to either mechanism at will.

55. A mining machine feeding mechanism comprising relatively rotatable feed operating and controlling members each adapted to cooperate directly with flexible feeding means, and a plural speed driving mechanism for said members for rotating the latter in a direction to draw in their respective flexible feeding means either separately or simultaneously at relatively high speed or at rela tively low speed or to permit said members to rotate in a direction to pay out their respective flexible. feeding means under various degrees of frictional resistance, said mechanism being operative to effect drive of one member at one speed and the other member simultaneously at the other speed and including a frictionally controlled slow speed gear train, a frictionally controlled fast speed gear train, said gear trains including coaxial terminal elements common to the drive of both members, and friction controlling clutches operable at will for connecting either member to either gear train.

1 63. A mining machine feeding mechanism including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated driving means therefor including a slow speed gear train anda high speedgeartrain each including a terminal gear and clutches for connecting either member to either gear or for connecting one member to one terminal gearwhile theother member is simulta' neously connected to the other terminal gear.

64. A mining machine feedingmechanism' including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor-operated 1 driving means therefor including a slow speed geartrain and a high speed gear train each including a terminal gear and clutches for connecting either member to either gear and means foroperating said clutches to effeet driving of one member at one speed and the other simultaneously at the'other'speed or vice versa.

65. A mining machine feeding mechanism including relatively rotatablefeeding members each adapted to cooperate directly with flexible feeding means, and motor operated driving means therefor for rotating said members either separately or simultaneously in a direction to draw in their respective flexible feeding means at relatively high speed or at relatively low speed including a fast speed gear train and a slow speed gear train each having a terminal gear and clutches for connecting either member in driving relation with either terminal gear or for connecting one member to one terminal gear while the other-member is simultaneously connected to the other terminal gear; I

66. A mining machine feeding mechanism including relatively rotatable fee-ding members each adapted to cooperate directly with flexible feeding means, and motor operated driving means for said members: for effecting drive thereof either separately or simultaneously including a'fast speed gear train and a slow speed gear train each having a terminal gear, the terminal gears ofsaidtrains being coaxially arranged, and clutch mechanism for each gear for connecting either member in driving relation therewith or for connecting one member to onet'e'rmmal gear While the other member is simultaneously connected to the other terminal gear. 67. A mining machine feeding mechanism including relatively rotatable feeding members each adapted to-cooperate directly Wltll flexible feeding means, and motor operated driving means therefor including a fast speed mechanism and a slow speed mechanism having final fast and slow speed driving elements through which either member may be driven, and clutch mechanism for connecting either member in driving relation with the final driving element- 'of either mechanism or for connecting one member to one driving element while the other member is simultaneously connected to the other driving element;

68. A mining machine feedingmechanism including relatively rotatable feeding inem bers eachadapt'ed to cooperate directly with flexible-feeding means, and motor-operated driving means for effecting rotation thereof either separately or simultaneously including a fast speedgear train and a slow speed gear train having final fast and slow speed driving elements through which either member may driven, and clutch mechanism, for connecting either-member in driving rela-' tion with the Iinai driving element of either ing element.

69. A: mining machine feeding mechanism including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated driving meansthereffor for effectingrota tion thereof either separately or simultane-' ously in a direction to draw in their respective flexible feeding means including a fast speed gear train and a slow speed gear train having fast and slow speed driving elements through a which either member may be driven, and clutch mechanismfor connecting either member in driving relation'with the final driving a fast speed gear train and a slow speed geartrain, said gear trains including coaxial fast and slow speed Worm wheels, and clutch means for connecting either member to one worm'wheel or to the other or for connecttrain, said gear trains including coaxial fast gear train orfor connecting one memberto i one driving element while the other memberis simultaneously connected to the other drivand slow speed Worm Wheels, and clutch means for connecting either member to one worm wheel or to the other," one Worm Wheel being operable to effect rotation of said members either separatelybr simultaneously at rela; tively low speed, the other Worm wheel being operable to drive said members separately or simultaneously at relatively speed and both being operable to effect rotation of one member {at L p e and the oth r member simulthneously .at the other speed. 7

72 A mining machine feeding mechanismincl'uding relatively rotatablefeeding memhers eachadapted to cooperate directly with flexible feeding means, and motor operated driving means for said members including a fastspeed geartrainand asloWspeed gear in, S d seer tra n te lu i e final iv g men an tc ec nism operable to effect drive of either member through h ifih i rir e eme e-.sar-tra n r g th i l d iri g e e ent oft e. o er or to efi'ect drive of onemember through the a k ingee eme t fe e ea i in w il driving of the other'member is simultaneous-v y- .efiee l i t o thefi e1- iriv e9l h other. e r w ne.

73. A mining machine feeding mechanism.

inclnding relatively rotatable feeding members each adapted to cooperate directly Wltlfl flexible! feeding means, and motor, operated driving were id mem e n ud n e neest ee remand; a ew spe dee r ,-w l m t vncl s mg al d w men s a d f l t h me hani m, ope b t f t i i'Ye "P e the membe rough,- one train orithrough the other; or to effect,

re 9 e mem e t h t e .finaLd i e; e em n 9 s a t ain-wh e. vin

of the other member is simultaneously effectf I flilbligh the na d iviegie ment 1 oi t e 1- oth er, geargtrain, said clutch v mechanisn in; cliiding} friction controlling clutches opera; eble tolconnect eitherjmemb erin driving rela 1 ri lementi te h rtion vvith the final ldri gear train,

I 745. A mining machine feeding mechanism;

e i n'e ei le i yk 1 ta a f eding m n 40 bers each adapted to cooperate .vvith flezgible feeding means, and 1 motor operated; driy i-n-gmean or s id rme ii e e i c udin -f t a d v' i ed'awor g r n a l ig eringiin eluding a final" fast speed Worm Wheel and a M n? s -s ee mn eelr; x io sc h meich i l r t s the final vorm wheel of either gearing;- or

for connecting one memberto one-worm eqheel' while the other member -is simultaneously;

i connected to .the other wheel; 4

75. A mining machine feedingimechanism inc liding lf liltiv ly rotatable l edfingffln mi 1; Wheel, and friction clutches-one individual el d vw l?ted t 'l pera e e t y w th i eif d n m ansp ndm t-Q Op a-t d -driviiig ineans ref said members for effecting;

t ti eethr e e separa ly s mu taneously in a direction to draw in their repet l fl ib e f di s-mean vi c uding fast ,speed, gear tra n and a; sloyv" speed gear including, relatively rotatable feeding meme afir c ne ng either r rnlmaxto 1 bers each adapted l'LOQOOPQlffltG directly with flexible feedihgmeans, and motor operated driving means for said members for efiecting rotation thereof either separately-or simultaneously in a directionto draw in their respective flexible feeding 'means including a' fast speed gear train and a slow speed gear train, each train including a terminal gearandsaid gears beingcoaxially arranged, and a friction. clutches individuallto each member for respectively connecting either terminal gear in driving-relation tothatmember. 4, 7 7', A mining machine feeding mechanism inoludingrelatively. rotatable feeding mem- T bers each.adaptedtocooperate directly with flexible feed-ing means and-motor operated driving-meansifor said members-for-eifecting rotation-thereof .eitherseparately or simul taneously in ,adirection-to draw in their respective flexible feeding ;means-. including ,a fastispeedgeartrain and a slow speed gear" 1 train, eachtrain including a-terminal gear l rotating on a horizontal aXis, andfrictien clutches individual 'etoi-eaeh member for respectively connecting either. terminal. gear in drivingrelationtothatmember;

78.1, A mining; machine feeding mechanism including relatively rotatable feeding mem berseach a dapted-to cooperatedirectlywith Y fiexiblefeeding means, and motor operated drivingmeans wfor said-members foneffect ing. rotation thereof either separately or simultaneouslyiin a direction to drawin'their respective flexible {feeding means including a fast speedgear: train and-a slowspeed gear train, each .traindncluding-aterminal "gear rotatingion a horizontaltransversely extending axis, and friction clutches individual'to: each member for respectively connecting either 7 terminal 1 gear in driving relationto that member. l V

79.. Aminingmachine.feeding mechanism including relatively rotatable feeding mem-v bersea chadapted. to cooperate directly with flexible. feeding means, and motor-operated drivingrmeansfor said memb'ersafor effecting rotation thereof eitherseparately or simultaneously infadirection to draW- ii -their respective flexiblefeeding :means includii'i-g' a fast speed gear train ganda slowspeedgear train, each gear-train'includingi-a worm' to each. member for connecting either 'Worm Wheel-indriving relation-With either membere or for-1- connecting, one ,member to one Worm ;,iWheel While the other member is simultaneously. connected tothe other orin Wl16l- 80., A mining machine feeding "mechanism bers each adapted to cooperate directly with flexible feeding means, and, motor. operated- ;drivinggmeians for said members-for! effecting:

neouslylin aa, direction to draw in their-"re. speetive flexible ,feedlng' means including a.

including relatively rotatablerfeeding me-mfast speed gear train and a slow speed gear train, said gear trams each including a final driving element common to the drive of both of said members, and clutch mechanism operable to effect drive of one of said members at relatively high speed while said other member is driven at relatively low speed and vice versa.

81. A mining machine feeding mechanism including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated driving means for said members for effecting rotation thereof either separately or simultaneously in .a direction to draw in their respective flexible feeding means including a fast speed gear train and a slow speed gear train, said gear trains each including a final driving element common to the drive of both of said members, and clutch mechanism operable to effect drive of oneof said members at relatively high speed while said other member is driven at relatively low speed and vice versa and controllable to permit rotation of said members in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance.

82. A. mining machine feeding mechanism including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated driving means for said members for effecting rotation thereof either separately or simul taneously in a direction to draw in their respective flexible feeding means including a fast speed gear train and a slow speed gear train, said gear trains each including a final driving clement common to the drive of both of said members, and clutch members operable to effect drive of one of said members at relatively high speed while said other memher is driven at relatively low speed and vice versa and controllable to permit rotation of said members in a direction to pay out their respective flexible feeding means under various degrees of frictional resistance or without such resistance.

83. A mining machine feeding mechanism including relatively rotatable feeding members each adapted to cooperate directly with flexible feeding means, and motor operated devices for rotating said members either separately or simultaneously in a direction to draw in their respective flexible feeding means including a fast speed gear train and a slow speed gear train, each gear train including a terminal gear and said gears belng coaxially arranged, and clutch devices for connecting either member in driving relation with either terminal gear or for connecting one member with one terminal gear while the other member is simultaneously connected to the other terminal gear.

84:. A mining machine feeding mechanism including relatively rotatable feeding members each adapted to cooperate with flexible feeding means, and motor operated driving means for said members including fast and slow speed worm gearing common to the drive .of both feeding members, said gearing in- 85. In a miningmachine, a machine frame,

a motor, feeding mechanism driven by said motor including relatively rotatable feed drums arranged at opposite sides of said frame and each adapted to cooperate with a feed cable, and a plural speed driving mechanism for said drums for rotating the latter.

eitherseparately or simultaneously in a direction to wind in their respective feed cables at relatively low speed and at relatively high speed, said driving mechanism including a high speed drive and a slow speed drive, said drives being common to both drums and fast and slow speed frictional controlling clutches individual to each drum.

86. In a mining machine, a machine frame, a motor, feeding mechanism driven by said motor including relatively rotatable feed drums arranged on horizontal axes at opposite sides of said frame and each adapted to cooperate with a feedcable, and a plural speed driving mechanism for said drums for rotating the latter either separately or simultaneously in a direction to wind in their respective feed cables at relatively low speed and at relatively high speed, said driving mechanism including a high speed drive and a slow speed drive, said drives being common to both drums and fast and slow speed frictional controlling clutches individual to each drum.

87. Ina mining machine, a machine frame, a motor, feeding mechanism driven by said motor including relatively rotatable feed drums arranged on horizontal axes extending. transversely of the machine at opposite sides of said frame and each adapted to co-' operate with a feed cable, and a plural speed driving mechanism for said drums for rotating the latter either separately or simultaneously in a direction to wind in their respective feed cables at relatively low speed and at relatively high speed, said driving mechanism including a high speed drive and a slow speed drive, said drives being common to both drums and fast and slow speed frictional controlling clutches individual to each drum. I

In testimony whereof I affix my signature.

MORRIS P. I-I'oLMEs.

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