US1430669A - Mining and loading machine - Google Patents

Description

E. C. MORGAN.

MINING AND LOADING MACHINE.

APPLICATION FILED SEPTIQ, 1915. RENEWED MAR. 28, 1921.

194L8Q669" Patented. 00513 1922 I2 SHEEQTS$HEET I.

E. A RGAN.

' MINING AN ING MACHlNE. PPLICATION .FILED SEPT. 9. 1915. RENEWED MAR. 28, 1921 A 1,4E3 6@90 Patented OM13, 1922.,

12 SHEETS SHEET 2.

E. C. II/IOFIGAN.

MINING AND LOADING MACHINE. APPLICATION FILED SEPT. 9. 1915. RENEWED MAR. 28, 1921.

a /MM y m m ya g 39% v RN hhw ,NN Mfl w 5 dm Vfi I 5% m i E. C. MORGAN.

MINING AND LOADING MACHINE. APPLICATION FILED SEPT 9, I915- RENEWED MAR. 28, I921.

12 SHEETS-SHEET 4.

IIIIIIIIIIIII I "III E. C. MORGAN.

MINING AND LOADING MACHINE.

APPLICATION FILED SEPT. 9, I915. RENEWED MAR. 28. I92I- 1,43%669. Patented Oct. 3, 1922.

I2 SHEETS-SHEET 5.

E. C. MORGAN.

MINING AND LOADING MACHINE. APPLICATION FILED SEPT. 9. I915. RENEWED MAR. 28, 1921.

Patented 001;. 3, 11922.

12 SHEETSSHEET 6.

a I I z a" L E.' C. MORGAN.

MINING AND LOADING MACHINE.

APPLICATIONFILED SEPT 9; I915- RENEWED MAR. 23,1921- 12 SHEETS-SHEET 7- E. C. MORGAN.

MINING AND LOADING MACHINE. 4 7 APPLICATION FILED SEPT. 9, I915- RENEWED MAR. 28,1921- I 1,%8U,669 Patented Oct, 3, 1922.,

12 SHEETSSHEET 8.

:77? MQWZ OT/ 47391? 6170a 2 E. C. MORGAN.

MINING AND LOADING MACHINE. APPLICATION FILED SEPT 9, 1915.

RENEWED MAR,28,1921.

Patented Oct. 3, 1922,

AACSUJSGQQ 12 SHEETS-SHEET 9- Wit 746.

E. C. MORGAN.

MINING AND LOADING MACHINE. APPLICATION FILED SEPT 9, I915- RENEWED MAR. 28, 1921.

Llwfiwb Emma 0m. 3, 19229- 12 SHEETSSHEET10- E. c. MORGAN. MINING AND LOADING MACHINE. APPLICATION FILED SEPT. 9, I915. RENEWED MAR. 28,1921.

Patented Oct. 3, 11922.,

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Cu N H C IA M A M N 0 A M0 IL CD N A G N N M APPLICATION FILED SEPT. 9, I915- RENEWED MAR. 28, 1921.

Patented Oct. 3, 1922..

12 SHEETSSHEET l2.

mmw W 1W. W. mww QR Qw m mW hmw 1 m \Nwk WM 0 OMHWH W 0M? 5 M K WM n r ya L 15 m N MN mum mm sob srArEs atented EDMUND C. MORGAN, OF NEW YORK, N. Y.

MINING AND LOAQING MACHINE.

Application filed eeptember 9, 1916, Serial Ito. 49,669. Renewed March aa, 1921. ermine. #156,206.

To all whom it may concern:

Be it known that 1, EDMUND C. MORGAN, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Mining and Loading Machines, of which the following is a specification.

This invention relates to mining and loading apparatus whereby material is completely severed from a mine wall and then moved back from the mine wall into posi-.

tion for loading. One of the objects of my inventionis to provide improvements on the mining and loading machines disclosed in my copending applications Serial Nos. 848,727, filed July 3, 1914., 864,211, filed September 30., 1914, and 39,986, filed July 15, 1915. Other objects of the invention will appear hereinafter.

The invention comprises the combination and arrangement of parts described in the following specificatiom'shown in the accompanying drawings and more particularly pointed out in the appended claims.

In the drawinge- I Fig. 1 is a side elevation of a mining machine embodying the present invention and shown in operative position in a mine chamer. v

Fig. 2 is a top plan view of the frame portion of the machine shown in Fig. 1.

F ig. 3 is a top plan view of the entire machine shown in operative position in a mine chamber.

Fig. 4 is a longitudinal sectional view of the machine shown in Fig. 1 with the chain cutter and frame shown in side elevation.

Fig. 5 is a fra mentary top plan view of the machine with the upper part of the frame broken away to show the winding drums and their related parts.

Fig. 6 is a sectional view of the hollow axle which carries the cutter frame showing the operative mechanism enclosed therein.

Fig. 7 is a sectional view taken on line 7-7 of Fig. 6.

Fig. 8 is a sectional view taken on line 8-8. of Fig. 6.

Fig. 9 is a sectional view taken on line 9-9 of Fig. 6..

Fig. 111 is a sectional view taken on line 10-10 of Fig. e. I p

Fig. 11 is a top plan view of the hollow axle which carries the cutter frame.

i for the attachmentshown'in Figs. 13 and 14:.

F ig. 16 is a fragmentary plan view with a portion of the cutter frame in section showing afragment of the conveyor belt and the means for connecting the conveyor belt to the cutter frame.

Fig.1? is a section on line 17-17 of Fig. 16.

Fig. 18 is a side elevation of the portion of the conveyor belt shown in Fig. 16.

Fig. 19 is a detail view of the connection between the conveyor belt and the operating rope therefor.

Fig. 20 is a section on line 20-20 of Fig. 16.

Fig. 21 is a fragmentary detail of the cutter frame rope guide.

Fig. 22 is an elevation of a portion of the cutter chain showing the method of attaching the cutters thereto. v

Fig. 23 is a front elevation of the-chain shown in Fig. 22.

Fig. 24c'is-a section on line 24-24 of Fig. 22.

l. ig. 25 is a fragmentary horizontal view showing the socket for one of the cutters.

Figs. 26 and 27 are fragmentary details of modifications of the socket member.

Fig. 28 is a fragmentary top plan of a modified form of a socket and cutter.

Fig. 29 is a section on line 29-29 of F'i 28. Fig. 30 is a longitudinal section of a modified form of cutter frame axle arranged to enclose a reciprocating engine.

Fig. 31 is a horizontal section of the axle shown in Fig. 30.

Fig. 32 is a section on line 32-32 of ig. 33 is a section on line 33-33 of Fi .31.

Fig.3t is a section on line 343et of Fig. 31.

Fig. 35 is-a side elevation'of the cutter frame axle shown in Fig. 30.

The frame-on which the operating parts;

ofjthe machine'embodyin thepresent invention are'carried is best s own in Figs. 1, 2 and 4, and comprises a bed platel, rear up rights 2 and forward uprights 3, upper horizontal-beams'4 and diagonal braces 5. Connected to the diagonalbraces 5' and standing at aninclination upwardly from the forward 5 portion a of the machine is" a conve or bed at 7 and has a orizen tal portion 8 which extends rearwardly .to'

plate 6 which is bent .the discharge end of the machine. Beneath the portion 8 is a second horizontal web 9 "for supporting the underrun of the conveyor x ibelt, as best 15' *rights 3 by heavy pivot bolts 10 is a bracket .11 having' forwardly own in-Fig. 4. Pivoted to the upper portions of the uprejecting bracket ,arms 12,.and a rearwar 13 for adjusting the' bracket about the pivots 10 and for holding it in adjusted position.

A heavy coil spring 14 connects the arm 13 to one of the uprights 3 and normally draws the arm 13 downwardly to form a counterbalance for the weight supported on the bracket arms 12. At the end of the arm 13 is a rack 15 which meshes with a worm 16 controlled a hand wheel 17 by means of which the bi acket may .be adjusted about the pivots 10 and held in adjusted position. As shown in Figs. 2 and 9, the forward ends of the bracket armSlQ are provided with bearing rings 18 which are split at19 (Fig. 9) leaving the front half 20 detachable and held in bracket arm 12. The bearing is provided.

with a' bushing 24; At the opposite end of the axle is a circular bearing 25 in which is positioned a bushing 26, andmounted to ro- 'tate on this bushing is an internal gear 27 having a sleeve 28 which surrounds the bushing 26 and is fitted into the bearing 18 of the bracket member 12, as shown at the righthand side of Fig. 6. A bushing29 is interposed between the bearing 18 and the sleeve 28.- In this way-the hollow. axle 22 is mount- '55 ed for rotation inthe bearings 18 of the adjustable bracket arms 12.

Centrally located within the interior of theaxle 22 is a'motor armature 30 having cular bosses and 36. The plates 33 and 34' are supported on the side opposite the bosses 35 and 36 by similar semi-circular bosses 37 and 38 which are'in turn carried by y proj ecting. arm

v 1 scribed rame axle 1s best shown 'in a cover late 39 held in position to close one sideof t e opening in the casting 22 by bolts 40, of which thereare four shown in Fi s. 11 and 12. Field poles 41 are carried by t e casting 22 and the cover plate 39, as clearly shown in Fig. 6, and the armature 42 of the motor is provided with brush-holders 43 to which flexible cables 44 conduct the current .for driving the armature; A pinion 45 is carried at one end of the armature shaft and meshes with a gear 46 which is mounted on a shaft 46' supported in a bearing 47 carried on an internall projecting portion 48 .of the casting 22 igs. 6 and 7). Extendin'g transversely of'the axle so as to effectuall close the lower half thereof, as viewed in igs. 6 and (,is a plate or web 49, shown broken awa in Fig. 7 to better show the gearing. T-e upper portion of the hollow axle is closed at this point by a casting 50 having a web 51 secured thereto which is semi-circular in formation and fits closely against the interior portion of the cover plate 39. The casting 50 is secured to the internally extending portion 48 of the casting 22 by leg screws 52. In this way a complete- 1% enclosed chamber is provided in which t e gears 45 and 46 operate, which chamber may be filled by any suitable lubricant to overcome the friction of the gearing. Coaxial with the gear 46 and rigidly secured thereto is a pinion 53 (Fig. 7) which meshes with a second pinion 54 rigidly mounted on a shaft 55. The pinions 53 and 54 are also enclosed in the lubricating chamber deabove.- The shaft 46 extends through the bearing 47 and carries at the outer end thereof beyond the web 49 a beveled pinion 56. The beveled pinion 56 meshes with a beveled gear 57 mounted on a shaft 58 arranged transversely of the hollow axle and carried by a bracket 59 formed integrally with the internally projecting portion 48 .of the casting 22. The shaft 58'has secured thereto a sprocket wheel 60, (as shown best in "Fig. 6) about which the cutter chain 61 passes and by which the chain is driven. The chain 61 is guided into the interior of the axle 22 through an opening 63 by an incurved portion 64 of' a guideway 65 which extends longitudinally of the casing and along which the chain, 61 slides. In this way rotation of the armature 30 is transmitted through the gears 45, 46, 56 and 57 to the sprocket wheel 60 which in turn drives the cutter chain 61; the gearing for transmitting the motion being all contained within the hollow axle of the cutter frame.

The shaft 55 passes through an opening in the extended portion of the casing which surrounds the gears 46 and 54 and extends longitudinally of the casing on the outside thereof, gas shown in Fig. 12, and is supported by bearings 66 mounted on the exterior of the casing. Secured to the end of 1,4so,eee

the casing opposite that which contains the caring. described above is a cover plate 67 %Figs. 10 and 12) into which the shaft extends and which encloses a worm 68 mounted on the shaft 55 and which meshes with a Worm gear 69 rigidly mounted on a shaft 70. The shaft 70 1s supported at one end in a bearin 71 provided in the casting 22, and at its 0t or end in a bearing 72 'provided in a heavy detachable cover plate 73 secured to the casting 22 by bolts 74, as best shown in Fig. 10. Rigidl secured to theshaft 70 and within the c amber provided by the casting 22 and the cover plate 73 is a Worm 75 whlch meshes with a'worm wheel 76 which is mounted for free rotation on a shaft 771 Theworm wheel 76 has integrally formed therewith a pinion 78 which is arranged to mesh with the teeth of the internal gear 27, previously described. The shaft 77 is securely mounted at one end in the casting 22 and is held rigid with this casting at the otharend by means of the cover plate 73 and bolts 74. The worm 7 5, Worm-wheel 76 and pinion 7 8' are all located in a closed chamber formed by the casting 22, the cover plate 73 and the internal gear 27 so that all these gears may operate in a lubricant contained within this chamber. The lubricant is prevented from escaping at the end of the teeth on the internal gear by a flange 80 extendin! around the axle 22. A plate 81 is bolted to t e end of the axle 22 and is of sufficient diameterto extend beyond the circumference of the bearing 26 and to overlap the circular bearing 18 carried by the bracket arm 12 and thus hold the axle in place relative to the bracket arm.

The chain 61 at the end of the axle just described is guided inwardly by an incurved portion 82 of the track or guideway 65 through an opening 83 in the hollow axle 22 into the interior portion'of the axle. An

inwardly extending semi-circular guide 84 is positioned within the interior portion of the axle around which the chain slides to change the direction of travel thereof.

The cutter frame itself comprises a U- shaped cutter bar 85, the two arms of which are adjustably secured to the ends of the hollow'axle by plates 86 and 87 (Figs. 1 and 6) held in position by lag screws 88. A reinforcement is secured to the rotating axle 22 at each end thereof and lies directly behind the arms of the cutter bar 85. These reinforcements 85' are of the same thickness as are the arms of the bar 85 and hence do not interfere with the passage of the arms throu h. the coal. It will readily be seen that the cutter bar may be adjusted relative to its axle by loosening the screws 88 and sliding the bar between the axle and the plates 86 and 87. This adjustment may be made for varying the amount of space included within the U-shaped cutter frame or for tightenin r or loosening the cutter chain. The construction of the chain itself, together with the means for guiding the chain along the cutter bar, will be described later.

The cutter bar is forced into thecoal by ,the rotation of the hollow axle 22, carrying the bar therewith, in its hearings in the brackets 12. This rotation is controlled by a brake-band 89 (Figs. 3, 6 and 8) which surrounds the outer portion of the internal gear 27 and which may be tightened about this gear by a screw rod 90 and hand wheel 91, as indicated in Fig. 4. ()ne end of the brake band 89 has a lug 92 secured thereto through which passes 'a pm 93 which extends'latcral l y from a lug 94 carried on the bearing mcmhcr 20 of the bracket arm 12. In this way the brake band 89 "is prevented from rotation and when tightened about the internal gear 27 it prevents rotation of this gear. It will be noted that the internal gear 27 meshes with the pinion 78 which is driven through two sets of'worms and worm wheels by the shaft 55 geared in turn to the armature 30. By this means the pinion 78 is given a slow and very powerful movement. So long as the gear 27 is free to rotate in its hearings the movement of the gear 78 produces no effect butas soon as the gear 27 is held stationary by the brake band 89 the internal gear 78, in order to rotate under the power of the armature 30, must travel around the interior of the internal gear 27. The gear 78 carries with it in this movement the shaft 77 and hence the hollow casting or axle 22 together with the cutter frame 85. In this way a slow and powerful feeding movement is imparted to the cutter frame 85 to rotate it about the center of the hollow axle 22 and to force it into the wall of the mine. During this movement of the cutter frame the chain 61 is driven in the manner previously described to form the kerf in which the out ter frame moves. a

When the cutter bar is moved in the manner described it sever-s an upright crescentshaped section of material from the mine wall, indicated by the numeral 95 in Fig. 1 of the drawing. When this mass of material has been loosened from the mine wall 13 to 21 inclusive. As shown in Fig. 1

the belt must be of sufficient length to be drawn forwardly into the kerf formed by the cutter chain and to extend from a position substantially adjacent the rear of the cutter bar when it has reached its uppermost position around through the kerf and back upon the inclined portion of the con veyor bed 6.

which has a curved The rope extends from the uide 99 parallel with the arm of the cutter ar and directly in the rear thereof to a pulley 100 secured to the hollow rotating cutter bar axle as shown in Fig. 4. The cable 97 extends from the pulley 100 rearwardly veyor bed 6. and thence over apulley secured to. the under side of the conveyor bed and from the pulley 102 to a drum 103.

The end of the belt 96 opposite to that securedto the cable 97-has a second cable 104 secured thereto. The cable 104, as shown in F'i 4 and 5, is guided over a pulley 105 carried on a transverse shaft 106 to a drum 107. The drums 103 and 107 are both free to rotate on a shaft 108 mounted in bearings 109 suitably supported from the base plate 1 of the frame. A friction clutch 110 is provided for clutching the drum 103 to the shaft 108 to cause the drum to rotate with the shaft, and a similar clutch 111 is provided for the drum 107. The clutch 110 is thrown into and out of engagement with the drum 103 by an arm 112 carried on a pivot block 113 upstanding from the base plate 1. The clutch 111 is operated by a similar arm.114 carried on a pivot block 115. The arms 112 and 114 are connected by a link 116 in such a manner .that when oneof the drums 103 and 107 is clutched to the shaft 108 the other drum will be free to rotate thereon, as clearly shown in Fig. 5 of the drawings. The clutches 110 and 111 are operatedby a hand lever 117 secured to the arm 114. The shaft 108 is driven by a motor 119 mounted on the base plate 1 and connected to the shaft through gears 120. A sliding brake bar 121, shown portion 123 of the bar 4 and 5-. is arranged for holding the drum 103 from rotation at certain periods in the operation of the machine. The brake bar 121 is provided with a spring 122 which normally forces the wedge-shaped in Figs.

a brake wheel 124 secured to the drum 103. The spring 122 bears at its other end against a block 125 secured to the base plate 1; At the forward end of the brake bar 121 is an upturned portion 126 adapted to contact with the guide 99 carried by'the cutter-bar The forward end ofthe belt- 96 is secured, b means to be described, to

portion .of the cutter the rope around the,

through an opening 101 in the con- 102 soon as the cutter bar is 121 into contact with 85 when the cutter bar is in its rearmost position. In this way the cutter bar is enabled to release the brake 123 from the drum 103 at the end of the backward movement of the cutter bar.

Assuming that the parts described are in the; position shown in- Fig. 4 and that it is desired to make a cut, the operator first throws the lever 117 toward the forward end of the machine, as shown in Fig. 5, thusjconnecting the drum 103 to the shaft 108....As' the drum 103 begins to rotate it will draw on the cable 97 and thus pull the endof the'belt 96:-into a position closely ad-- jacent thelpulley block 98' carried by the cutter bar 85.- As soon as the beltis drawn forwardly the lever 117 is moved to its central or neutral position, leaving both drums v 103 and 107 disconnected from the shaft 108. The hand wheel 91 is then rotated tos tighten the brake band 89 and thus start the cutter bar on its forward movement in the manner previously described. As moved away from the'projection 126 the, brake 123 will be forced by the spring 122 into contact with the'brake wheel on the drum 103, thus looking the drum against rotation. As the cutter bar moves forwardly a' portionof the cable 97 carried by the lower portion of the I bar will also be caried forwardly, and since the end of the cable 97 secured to the drum 103 is held from movement the opposite end ,of the cable secured to the belt'96 will be moved forwardly directly in the rear of the cutter ba'r andhence caried into' the kerf formed .by the forward movement of this bar,,as shown in Fig. 1. It is true that the movement of the cutter bar will swing the pulley bac'kwardly toward the pulley block 102 during the first part of the motlon of the bar-thus slacking to some extent the cable 97. This slacking of the cable will permit the belt 96 to lag be-- hin' themovement of the cutter bar to some extent but this falling away of the endof the belt from .the cutter bar isnot sufiicient to. interfere with the operation of the" belt in intercepting the coal loosened fro'm'the mine wall. When the cutter bar is swung through the entire arc of movement necessary to sever the\section '95 of coal from the mine wall the coal will drop downwardly on the belt 96, breaking up to a greater or less extent, depending on-the nature of the coal; After the cut is complete the brake band 89 is loosened to stop the movement of the cutter bar and the clutch 111 is thrown into operation to connect the drum 107 with the shaft 108.- As the drum 107 rotates it winds up the cable 104, thus pulling rearwardlv on the belt 96. As the belt is' drawn backwardlyby the cable 104 it draws the severed coal with it and also returns the cutter frame 85 to original position. The

rat

1 coal the device is again in the position shown I 11. ,aaonee hii been released the cable 104. is free to un-- 'wind from the drum 103 in order to permit the belt 96 to travel upwardly and rear wardly along the conveyor bed 6 to the discharge positlon. After the discharge'of the in Fig. 4 and is ready for a second operation.

In order to make'sure that the coal will be drawn back with the belt 96"'during its backward movement a retainer is provided at the forward end of the belt which consists' of a bent bar 132 (Fig. 16) journaled in bearings '133 carried by a metal reinforcement 134 at the forward end of the belt. Rearwardly extendin portions 135 of the bent bar-132 norm y lie substantially in the same plane as the belt 196 and between the forwardly projecting arms 136 of the metal reinforcement 134:. The cable 97 has secured to its end a metal clip 137 jvhich carries projecting pivots 138 which are pivoted to the arms 139 of the bar 132 a short distance back of the central bearing 133. It will be seen from Figs. 16 and 17 that the tension upon the cable 97 and belt 96 will tend to rotate the arms 139 in the hearing 133 and thus raise the rear portion 135 of the bar 132 upwardly out of the plane of the belt 96. The amount of this upward movement is limitedfby a retainer 140 pivotally carried at 14.1 on the central rearwardly projecting arm 1%. The bent ends 1 12 are positioned in slots 143 in the arms 139. This retainer140'when swung upwardly by tension on the rope 97 will be held in about the position shown in Fig. 4. When the belt is being wound forwardly by the cutter frame moving into the kerf the pressure of the coal at either side of the kerf will hold the bars 135 in substantially the same plane as the conveyor belt,

but when the return movement is begun the bars 135 will catch on the severed coal and the pressure of the coal against the bars will then tend "to move them butwardly away from the belt instead of into the plane of the belt, as was the case during the forward movement of the device. In this way the bars are thrown outwardly until stopped by the retainer 140 and are held in such po- 1 sition that they will bear against the loose coal and insure its being drawn backwardly by the belt to a position where it may be discharged into the car 130.

It may sometimes occur that the coal as it is drawn backwardly by the conveyor belt will fall off the edges of the belt. on to the floor of the mine chamber. To prevent this a pair of sliding shields or side boards 150 are mounted at each side of the frame, as shown inFigs. 13 and 14:. These side boards rest against the uprights 3 and have overhanging lugs 151 which hook over the top edges of the inclined braces 5. As the cutter frame swings to the rear these bars are pushed backwardly and upwardly in front of the frame and prevent the coal from falling from the edges of the conveyor belt. When the frame is again swung forwardly for a new cut the guards 150 will' slide by gravity downwardly along the conveyor bed until'the forward portion of the guides strike the floor of the mine. This will bring the forward ends of the guides a considerable distance intothe kerf formed by the cutter chain, as shown in Fig. 13. It may be found desirable to positively draw the guards forward] with the cutter bar, and in Fig. 15 is s own a simple mechanism by which this may be accomplished. A rearwardly and upwardly projecting hook ,153 is provided on the rope guide 99 and an eye 154 1s secured to the forward end of the guard 150 in'such a position that the hook 153 will swing to a position immediately below the eye 154 on the rearward movement of the cutter bar.- As the cutter bar is moved farther to the rear the hook 152 will enter the eye 154: and the two will move to.-

gether-in this relation until the cutter bar reaches its extreme rearward position. When the bar is again swung forwardly the hook 153 will positively draw the eye 154:, with the guard attached thereto, with it until the bar reaches .substantially the osition shown in Figs. 13 and 15. The 00k 153 will then leave the eye 154: and the cutter bar will continue its movement, leaving the uard in the position shown in Fig. 13. In t is way the guard is positively drawn into operative position to prevent coal from falling from the edges of the conveyor belt. As shown in Fig. 3, the mine chamber is considerably wider than the machine and the machine is enabled to take three separate cuts for each movement of the machine forwardly in the chamber. In order to make these different cuts it is necessary to shift the forward portion of the machine laterally from one side of the chamber to the other. This is accomplished by cables 155 which are guided by pulleys 156 and 157 to the drums 158 carried on the shaft 108 and adapted to be secured for rotation therewith by clutches 159 operated by hand levers 160. v

The construction of the cutter chain itself together with the means by which it is guided upon the cutter bar, is best shown in and is covered in my Ser. No. 848,726, No. 12,760., filed Figs. 22 to 29 inclusive, copending applications filed July 3, 1914; Sen.

' March 8, 1915; and Ser. No. 860,371,.filed September 5, 1914. The cutter chain itself comprises two different forms oflinks but both forms of links have rearwardly projecting shanks 161;which are slidably carried by the forward edge of the cutter bar 85. The cutter by 85 has two plates 162 and 163 secured theretob screws164 and rivets 165frespectively. he late162 overlies an ofls'et portion 166 carried by the shankplate 163 is adaptedl'to slide central opening. 167 .in

are held in place by connecting links 171 which are prevented from becoming detached from the ends of the pivot bars 116 by spring retainers 172, the ends of which enter notches 173 in the pins 168. The body portions 169 of the alternate links of the chain have forwardly projecting socket I members 174 which are provided with sockets 175 extending longitudinally of-the direction of movement of the chain andin which cutter bits 176 are carried. The cutter bits 176 are provided with shanks 177 fitted into the sockets 175, and these shanks are held from accidental displacement by balls 178 carried in recesses 179 in the body members 169 of the links and I resiliently pressed into contact with the bit shanks by springs 180. As shown in Figs. 23 and 24 the cutter bits 176 are set at three different angles relative to the chain. The cutting edges of one set of bits project directly forward and the cutting edges of the other sets are turned to each side respective of the chain. This arrangement is made in order to provide a kerf of sufficient width to permit the passage of'the chain and cut-.

ter bar. The cutter bits are held in respective positions by notches 181 at the up er end of the sockets 175 into which the 0 set portions of the bits 176 fit when-the bits are in place. The only object of the friction" spheres 17 8 is to prevent accidental displacement of the cutter bits and to assist in preventing rattling of the bits. During the operation of the chain the force of the coal against the cutting edges tends to hold the bits in position in their sockets, as will be readily understood- If desired, the sockets 175 may' be made of angular 182 for y this arrangement it will.

2 formation, .as shown in Figs. .26 and 27 in which case the-bit shanks will be formed to correspond. If angular sockets are usedthey W111 ,beproperly formed to hold the bits in the various angular positions relative to the chain,- as indicated by the two Figs. 26and 27 A modified form of cutter b1t and socket is'shown' in Figs. 28 and 29. In this form the socket members 174 are rovided with upstanding flanges oldingthe. cutter bits in proper angular position and in place of, the-bal1s 178 sprin wires or rods. 183' extend from one of' t ese members 182 to the other These s ring'rods extend through openings 184 in t e members-182 and have their on s Countersunk openings 186 are provided in the members 182 to'accommodate' the bent- -over portions 185 'of the-rods 183 so that will-not extend laterally beyond the The springv the wi th of the socket members. rods 183 are solocated relative to the cutter bit socket that they .must be sprung slightly to one side,as'indicated in broken lines in Fig. 28, when the bit is inserted in the socket. After the bit has been inserted the rod will spring 'back to its original position, as shown in 'Fi' 29 and will slightl overlie the. bent portion of the cutter b1t thebit. H v A, s

It may sometimes be desirable to'use, in-

stead of the electric motor shown in Fig. 6, a

reciprocating engine driven either by steam or by compresedair; An arrangement by which such an-engine may be used'is shown in Figs. 30 toi3'5- inclusive. Where a reciprocating engineisnsed the main casting of the rotary axle is modified, as illustrated in these views there being a portion of the cast ing 200 shown near. the right hand .end of Figs. 30 and 35 and in cross section in Fig. 33 which has the general characteristic of an I-beam. Extending to the left of the part 200, as shown in Fig. 30, are two horizontal plates 201 andv 202, respectivelly These plates appear in cross section in ig. 34 and are spaced from one another to provide an openlng in which the engine is mounted. The left, hand end of the plates 201 and 202, as shown in Figs. 30 and 31, unite with an bearing 0 annel 24 which fits into the bearing 18in the pivoted bracket arm 12 in the same way as the corresponding bearing of the form previously described. The motor may be of. any well known and-approved form of reciprocating engine having cylinders 204, steam-chests 205, piston rods 206,-

crossheads 207, connecting rods 208 and valve rod 209. Either steam or compressed prevent accidental displacement ofbent over asat 185 to hold themin position.

.open 'rin 203 which is provided with a air may be admitted to the cylinders 204 through the pipe 210 and flexible connecting tube 211. The main shaft 212 of the engine carries a sprocket wheel 213 which corresponds in every way to the sprocket wheel 56 of the form of device previously described. The cutter chain in this device is guided alon the guideway 21 1 and passes through an opening 215 in the base plate 201 and thence upwardly and over the sprocket wheel 213 in the same way as that shown in Fig. 6. One end of the main shaft 212 is provided with a bevel gear 216 which meshes with a second bevel gear 217 carried on the end of a shaft 218 which extends longitudinally of the casing and has a bearing 219 secured to the I-beam shaped part 200 of the casting 22. The engine itself is carried on its own base plate 220 which is secured to the lower plate 214: of the casting 22 by means of lag screws 221. The shaft 218 carries at its end adjacent the bearing 219 a worm 222 which meshes with a worm wheel 223 secured to the end of the shaft 224 which extends transversely through the portion 200 of the casting 22. An irregular cover plate 225 (Fig. 35) is secured to the part 200 of the casting 22 and cooperates with the said casting to form a chamber 226 into which the shaft 224 projects and within which the shaft carries a worm 227. The worm 227 meshes with a worm wheel 228 also within the chamber 226. The cover plate 225 is held in place by bolts 229 thus completely enclosing the chamber 226 so that it may be filled with a lubricant. Integral with the worm wheel 228 is a pinion 230 which meshes with the internal gear 27 in the same manner as the pinion 78 in the form of the device previously described. The gears 228 and 230 are carried on a shaft 231 and the gear 230 extends through an opening in a transverse flange 232, which flange 'ts against the face of the internal gear 27 to prevent escape of the lubricant at the end of the teeth of this gear. The internal gear 27 has a bearing portion 28 which fits into the bearing 18 of the bracket arm 12 in the manner previously described in connection with Fig. 6. The cutter chain 61 passes up over the guide member 8 1 in this form in exactly the same manner as in the form previously described. The part of the casting which carries the engine is provided with cover plates 233 carried on a rod 23 1 anddetachably secured in place at their lower edges by pins 235. The worm 222 and worm wheel 223 are completely enclosed by a cover plate 236, as shown in Fig. 31. In this way there is provided a hollow axle member in which a reciprocating instead of a rotary motor is completely enclosed and the operation of this form of device will be exactly the same as the form previously described except that a reciprocating engine driven by steam or compressed air is employed instead of an electric motor as in the other form.

mechanism having wish to be restricted to the exact construe-1 tion disclosed in the drawings and the foregoin description.

W lat I claim as new and desire to secure by Letters Patent of the United States is:

1. In a mining machine, the combination with a supporting frame, of core cutting an unobstructed core openin therethrough, a hollow axle journalled for rotation on said supporting frame, an operating motor-positioned within said axle, and means carried by said axle for driving said core cutting mechanism from said motor independently of said supporting frame, and means carried within said axle for feeding said cutting mechanism by rotating said hollow axle relatively to said supporting frame.

2. In a mining machine, the combination with kerf cutting mechanism having an unobstructed core opening therethrough, of a frame for supporting said kerf cutting :mechanism for partial rotation on a horizontal axis, a motor carried by said frame approximately on the axis of rotation thereof and movable bodily therewith, operating connections between said motor and said kerf cutting mechanism and carried by said frame, and an additional frame for pivotally supporting said first named frame. together with the parts carried thereby for partial rotation during the cutting of an upright core in a mine wall. I

3. In a mining machine, the combination with a supporting frame, of a hollow axle mounted on said frame for partial rotation relatively thereto, kerf-cutting mechanism comprising means for cutting spaced apart kerfs and connected to said axle to rotate therewith. relatively to said supporting frame, a motor located within said axle, means mounted on said axle for driving said kerf-cutting mechanism, and means mounted on said axle for effecting partial rotation of said axle and said kerf-cutting mechanism relatively to said supportingv frame to feed said cutting mechanism arcuately relatively to said supporting frame and while the latter remains stationary.

4. In a mining machine, the combination with kerf cutting mechanism having an unting mechanism by partially rotating said axle in said pivotal support,

5. In a mining machine,-=the'rconi inati i1 with kerf cutting mechanism having an unobstructedcore opening therethrou'gh, of a frame for supporting saidkerf cutting mechanism; and comprising an axle, a motor carried by said axle, operating connectionsflbetween said motor and 831d. kerf cutting rotation relativel mechanism including means-for swinging-- f 5 said frame on the axis *ofsaid' axle, and} 'spacediapartfbearing supportsengaging the. exteriorend portions ofisaid axle. o

v 6. In'a mining machine, the

mounted on said frame and journalle'd for thereto, a cutter frame connected to sai axle for rotation therewith and having an unobstructed core opening therethrough, an endless chain cutter mounted on said cutter frame and axle to travel around the cutter frame and longitudinally, of said axle, a-' mot or mounted within said axle, mechanismuwithi i 'said axle between said-motor and said chain cutter'for drivin the latter, andmeans carried by said axle or operation b said motorto eifect the rotation of said ax e and thefeed- I 7. In a mining ing of said chain cutter duringthe driving of the latter T v- I I l machine, a loop chain cutter, a frameon Which said cutter travels, a

. to be mined' hollow axle on which said frameis mounted,

. 8, In a mining machine, the combination with a supporting frame, of a hollow-axle carried thereby and journalled; for rotation relatively thereto, an endless chain cutter,

a cutter frame having an unobstructed core opening therethrough and rigidly connected tosaid hollow axle in position formovement therewith in spaced apart planes substantially at right angles to'the axis of said axle, amotor located-within said axle, means within said axle and located within said motor and said endless chain cutter for driving the latter aroundsaid-cutter frame and longitudinally along 1 said axle, and means carried by said axle for rotating the -'same,-togetherwiththe parts carried there by relatively to said supporting frame to effect arcuate feeding movement of said chain cutter to cut a core of'material be tween the spaced apart plane kerfs extending substantially at right angles to the axis of said axle.

9. In a mining machine, a loop ahollow axle for supporting said frame, and

a motor positioned within said axle for. cans-- ing said chain to travel on said frame and core cutter, .a U- said cutter, said, frame having an unobstructed core openin therethrough, a hollow combination with asupporting frame, of' a hollow axle chain core cutter, a frame'onwhich said'cutter travels,

forimparting a pivotal movement to said frame.

machine a loop chain .10. In a minin fiaped frame for guiding axle on which said rame is mounted, amotor within said axle, means driven by said motor for causing saidcutter to travel on ,sa1d frame, and means driven by said motor for imparting a rotary movement to said frame. q

- 11. In a mining machine, the combination with an endless chain cutter, of a frame comprising a hollow axle and a loophaving an .80 unobstructed core opening therethrough, for

guiding said endless chain cutter, means located within said axle for actuating said cutter to cause the same to travel around said loop guide frame,'a main supporting frame, means for pivotally supporting said axle together withfsaid guide frame, cutter and actuating meansen said main frame at end portions. of said axle and means also located within said axle for effecting the feed of said cutter arcuately 'on the axis of said axle.

12. In amining machine, the combination with a supporting frame, of a, hollow axle carried by said supporting frame and jour- I nalled for rotation relatively thereto, a chain cutting frame having an unobstructed core opening therethrough and rigidly connected to said axlesfor sole support thereby, a chain cutter mounted on said axle and said'cutter frame, a sprocket wheel located within said axle in-positionto drive said chain cutter, means for driving said sprocket wheel to effect the driving of said chain cutter, and

means for moving said axle relatively to said supporting frame tos'ecure arcuate feed of 1 said chain cutter;

13."In a mining machine, the combination with a-supporting frame, of a hollow axle pivotally mounted thereon, a cutter frame supported. wholly by said axle but being rigidly connected thereto I for movement therewith and having an unobstructed core opening therethrough, an endless chain cutter mounted on said cutter frame, means for iding said chain cutter along the exterior of said axle at the inner side. of the loop formed by said chain cutter frame, means for guiding said chain cutter into the interiorof saidaxle at one end thereof, means for driving said chain cutter,and means for rotating said axle relatively to said'supporting frame to effect arcuate feeding of said chain cutter.

14:. In a mining machine, the combination with a supporting frame, of a hollow axle pivotally mounted thereof, a cutter-frame rigidly connected to said axle and deriving its sole support therefrom, said cutterframe having an unobstructed core open-

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