US1482199A

US1482199A - morgan

Info

Publication number: US1482199A
Authority: US
Publication date: 1924-01-29
Anticipated expiration: 1941-01-29

Description

um. 29, 1924.- 1,482,199 V E. C. MORGAN MINING MACHINE -Original Filed March 2O 1916 vE3 Sheets-Sheet 5 Jan. 29 1924.

' 1,482,199 E. c. MORGAN MNING MACHINE original Filed MarohogQg). 191e sheets-sheet 4 Jan. 29, 1924. 1,482,199

' E. c. MORGAN MINING MACHINE original Filed Marcha). 191e 8 sheets-sheet 5 Jan. 29, 1924.

E. C.4 MORGAN MINING MACHINE Original FiledMarch 20. 191e 8 sheets-sheet 6 Alan, 29, 1924.

- E. C. MORGAN MINING MACHINE 7 Original Filed March 20. 1916 8 Sheets-Sheet '7 Jan. 29, 1924. 1,482,199

'A E. C. GAN

IIIIIIIIIII NE original Filed March 2o. 191e B eeeeeeeeee t 8 Patented Jan. 29, 1924.

UNITED srATEs l 1,482,199 PATENT OFFICE.

EDMUND C. MORGAN, F NEW YORK, N. Y.; OLIVE EUGENIEMORGAN EXECUTRIX OF SAID EDMUND C. MORGAN, DECEASED.

MINING MACHINE.

Application led. March 20, i916, Serial No. 85,243. Renewed January 22, 1923.

Re it known that I, Fin-ranno@ Mossen, a citizen of the United States. residing at New York. in the county ot New York and State oli New York7 have invented certain new and useful Improvements in Mining Machines. of which the 'following is a speciication.

rlhis invention relates to machines for mining coal and other similar substances, and has for its object the provision of a device of the character named which shall loc of improved construction and more e'liicient in its operation than machines of this character heretofore known. rl"he invention is exemplified in the combination and the arrangement of parts shown in the accomanying drawings and described in the folowing specification and it is more `particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a diagrammatic plan view ot the machine in operative position in a mine chamber.

Fig. 2 is a vertical section through a mine chamber representing` diagrammatically the machine in operative position.

Fig. 3 is a side elevation ot the machine as it appears during the process of making a cut.

Fig. 4; is a top plan view o' the complete machine and a portion ot a conveyor used in connection therewith.

Fig. 5 is a, fragmentary horizontal sectional view on the level o'lthev lino Iwo ol Fig. 'l but showing parts oit the machine not illustrated in the latter view.

Fig. e" is an enlarged sectional elevation ot the interior construction o'l' a planetary gear and brake mechanism shown at 70 in Fig.

Fig. 5b is a sectional elevation of a portion ot' Fig. o to show the planetary gear connections between the driving mechanism and the worm gearing oit the spaced apart horizontal korf cutters.

Fig. 5c is a tragmentarv sectional elevation to show the connections between the driving mechanism and the chain core out* ting mechanism.

Fig. 6 is a vertical sectional view on line (36 of Fig. 5.

Fig. 7 is a vertical sectional view on line 7-7 of Fig.

Fig tl is a, section on line BM-8 oli Fig. 6.

Fig. 8a is a detail of a cam action used ttor driving a portion ot the machine.

Fig. 9 is a fragmentary sectional view ol a material moving device forming part o'i the invention.

Fig. 10 is a fragmentary sectional vier.v on line 10-10 of Fig. 6.

Fig. 11 is a detail of a part used connection with the screw support for the ma chine.

Fig. 12 is a horizontal sectional view ot a modified form of the invention.

Fig. 13 is an elevational view of the forni of the invention shown in Fig. 12, and

Fig. 14- is a detail ot a portion of the form of the invention shown in Figs. 12 and 13.

Referring iirst to Figs. 1 to 11 inclusive, the numeral designates a supporting` frame member provided with a base 21 arranged to rest upon the floor of the mine chamber. as shown in Figs. 2 and. 3. The frame member 2() is also provided with a pair of upright standards 22 provided with pivot pins 23 at their upper ends. A vertically swinging trame 24s is carried by the pivot pins 23 and comprises a base plate 25 and an upstanding` guard wall 26. The uprights 22 are pr vided at their upper ends with internally threaded sleeves 27 in which anchor bars 281 are adjustably secured. The bars 2S are provided at their upper ends with pointed portions [for engaging the roel" ol' the mine chamber and are also provided with hand wheels 29 ilor adjusting the bars in their respective sleeves to torce their pointed ends; into contact with the mine root. The base plate oi" the pivoted traine work 24 is provided at its forward end with a circular opening 30. as will be seen from Figs. 5. 6. .7 and 8. Projecting inwardly from the periiiherjv of the opening 30 is a flange 31 forming a. circular track or slideway 'for the circular' plate 32 which rests upon the flange 3l and is capable of rotation thereon. A flat ring is secured to the base plate 25 and overlaps the edge ol2 the plate 32 to 'torni a guide lor holding the plate 32 in. position. lntegral with the plate 32 and projecting upwardly theretroni in spaced relation from one another near the liront portion of the plate is a pair of

uprights

35 and 36. These uprights have supports for holding in place the op eratng mechanism for the movable parts of the mining machine. A. vertical sleeve 3T is carried 'hy hrachete` 88 and 39 extending; horizontally from the u pripghts 35 and 36j the sleeve 37 being positioned centrally over an opening 4() .in the rotary plate 32. Thil supports 35 and 36 are also provided with upstanding` pedestals (one of which is shown at 42 in Fig. 6), which are provided with bearings 43 and 44 in which is journaled a. horizontal shaft 45. Carried by the support 35, as shown in. Figs. 4, 5, 6 and T, is a table or platform 46. rllheiv platform 46 has a circular outer periphery arranged to overlie approximately the outer periphery ot the rotary plato 322 its shown in Figs. 6 and 7 the table 46 is provided with. a laterally extending).4 bracket portion 47 which is provided with a. Collar 48 having an opening therethrough arranged in alignment with the opening;fr in the sleeve 37. To assist in supporting the collar 48 and` the table 4G the bracket 4T. as shown in Fig. 7, is provided with an arm which vis secured to the upright 35'. In tact. the entire 'tramework, including; 'the plate 32, the

uprights

35 and 36 and the table 46, constitutes a single integral cast-ing.

The support 21 is provided with a lorwardly projecting' tonpjue 5() having slideways 51 between which mounted a block 52 arranged to move backwardly and forH wardly between the ways 51. Carried by the block 52 is an upright standard 53 which is held in its supporting block hy a pin 54. lhile the upright 53 is tree to oscillate about the pin 54 as a pivot it is prevented from rotation about its aXis hy this pivot pin. The entire upper portion of the standard 53 is provided with screwthreads 55. The screw-threaded portions 55 ot the standard 53 cooperates with the internally threaded portion ot a worm nut 56 held in place l'ietwoen the collar 48 and the lower end o'l' the sleeve 3T. A plate or washer 5T is positioned between the upper surface ot the worm nut 56 and the lower end ot the sleeve 37. This,4 washer, as shown in Fig. 11, is held from rotation on the standard 53 by means ot keys 58 but is free to slide longitudinally aloiip; the standard. The washer 5? carries :i projection 59 hav-- ing an opening' 69 therein which is provided with a pin 61 arranged to pass through the openinpj 60 and enter a corresponding` opening' in the upper surface ot the worm nut 56. By means of this pin 61 it is apparent that the worm nut 56 may be locked against rotation on the standard 53. llhen the pin 61 is withdrawn 'from theopening 62, however, the worm nut 56'1nayy he rotated to move the traine-work, includingthe sleeve 37, the collar 48, the

uprights

35 and 36, the table 46' and all of the parts supported by this irame-work upwardly or downwardly along the standard: 53.

The medhanism for rotating the worm nut 56 will he best understood by referring to Figs. 5, 5"", 5b and 6. A motor 65 is mounted on the platitomi 46 and is provided with a horizontally extending shaft 66 which carries .a wormv 6T meshing with a worm wheel 187, shown in Fig. 5b connected through the planetary gearingto the worm 68. lonnected to the worm wheel 187w is a shaft 188 to which is splined the clutch element 69; and when the clutch element 69 is moved to the lett by means of' a lever 189, rotary motion is transmitted to the inner spur gear 190. The rotation oit the spur gear l-90causes the rotation ol the gears 191 and 192 in opposite directions, and theretore causes the latter to travel around the internal gear 193- in the same direction while occupying' diametrically opposite positions on the ends of the spider 194. This spider' 194' is keyed to the sleeve 195 which in turn is connectedto the worm 68 so as to rotate the latter whenever said sleeve 195 is rotated. lt should be understood, however, that the shat't 188 is not connected to either the worm (38 or the sleeve 195, but is mounted loosely witl'iin the latter and is connected only to the worm wheel 187 and to the clutch element 69. The casing 196 is provided with a hub 197 at one side for free rotation on the sleeve 195, and on the other side Hts on the projecting hub 198 of the central gea-r 190. The peripheral surface of the casing 196constitutes a brake pulley 199, and associated therewith is a brake band 200 which is rigidly connected at one, end 201 to the standard 202 which is fixed to the base plate 46. The other end, 203, ot' the brake band 200 is provided with a screw-threaded opening through which eX- tends the screw-threaded rod 204, so that when the latter is turned by means ot the wheell 205, the lirake band 200 may be applied to the brake pulley 199- so as lio hold the internal gear 193 stationary whenever desired. Vhen the brake hand 200 released, the internal gear 193 will` be "tree to turn when the clutch 691 is thrown in and power is transmitteil lo the near 190, and therefore no motion will he transmitted to the worm 68, but when the brake band 200 is applied', the gear 193 will be held stationary, and then when the clutch 69 is thrown in the spider 194 will be rotated andthereby transmit rotary movement to the sleeve 195 and also to the worm. 68 to which the sleeve 195 is connected `tor rotation. ly, itully applying' the brake mechanism, the worm 68 may he given a poweritul rotary movement at a comparatively rapid' rate, but whenthe hrale is partially released so as to permit slipping to a regulated degree, a slower rate of movement-may be obtained', althoughalso very powerful. The slow and powerful feeding-movement ot the cutting; apparatus.

may therefore be repguhixtlnl by the extent to lil() which the brake mechanism is applied. and when the cutting apparatus is to be returned to initial position, the brake may he fully applied so as to secure the maximum speed ot return movement.

lVhen it is desired to raise or lower the mining` machine the pin 6l is withdrawn from the opening 62 in the worm nut 36 and the worm nut is driven by means of the mechanism described. rThe rotation ot the worm nut on the standard 53 will cause the nut to be moved upwardly or downwardly along the standard, dependinpT on the direction ot rotation ot the motor 65. ln this way the miningr machine trame-work may be adjusted vertically to any desired position on the upright It will be seen that the vertical adjustment on the uprifgpjht 53 will produce a pivotal movement about the supports 23. This will vary the position ot the lower end ot the standard 53 somewhat causing the block 52 to slide on the guideway 51.

It'the worm nut 56 is locked from rotation on the standard 53 by means of the washer 57 and pin 61 rotation ot the shaft 63 will no longer rotate the worm nut 56 on the screw 55 but the worm nut will be held rigidly from rotation since the standard 53 is prevented l'rom rotation by the pivot pin 541-. lVhen the parts are in this relation therefore operation ot the motor will cause the worm 68 to walk around the periphery of the worm nut 56 and carry with it the entire trame work on which the worm 68 is mounted. By this method the trame work is rotated to feed the cuttingr mechanism of the miningmachine into the work, as will be more fully explained.

Carried by the supports and 36 at the upper and lower portions thereof respectively, are two

bearings

70 and 71. These bearing rings are split on a line transversely ot the machine and are provided with removable portions. as shown in Fig. 7, and held in place by bolts 72. The

bearings

70 and 71 are each provided with. two separate rings, the larger one of which, as shown in Fig. 6. is in axial alignment with the sleeve 37. The smaller bearingring of the

bearings

70 and 71 is offset laterally7 as shown in Fig. 7 and carries a vertical shaft 73. The upper bearing 70. as shown in Fig. '6, is provided with a bushing 74 in which a hollow drum 75 is journaled tor rotation. The drum 75 carries a spur gear 76 at its lower end and a sprocketjwheel 77 at its upper end. The lower bearing 71 carries a similar drum 78 which has a spur gear 79 at its upper end and two

sprocket wheels

80 and 31 at its lower end. The vertical shaft 73 (Fig. 7) is provided at its upper end with a pinion 82 which meshes with the gear 76 and at its .lower end with a corresponding pinion 83 which meshes with the gear 79. The shaft 73 is driven by a worm wheel 97 (Fig. 3) meshing` with a worm 86 carried on the motor shaft 66. fr clutch 37 7) operated by a lever 88 is provided tor connecting and disconnecting the shaft 73 with the worm wheel 85.

For severine' the material from the mine wall a system ot cutter chains is provided supported and `guided by a cutter chain frame-work best illustrated in Figs. L1t 5. and 6. This `trame-work comprises an upright bar 90 carrying horizontally extendine,r bars 91. and 92 at its upper and lower end. respectively. The rear portion of the upper bar 91 is provided with a downwardly projecting plate 93 which tits between zQjuideways 94- in the upper portion ot the

supports

35 and 36. A downwardly projecting` lug 95 is secured to the lower surface ot the plate 93 and the support; is provided with a cooperating lug 96. A threaded. rod 97 connects the

lugs

95 and 96 and is arranged to adjust the plate 91 longitudinally relative to the guides 94. In a like manner the lower bar 92. as shown in Figs. 6 and 10, is provided with an upwardly extending' lguide plate 98 which fits between guides 99 carried on the

supports

35 and 36. An adjusting screw 100 similar to the screw 97 is provided for the lower cutter bar 92. As shown in Figs. 5 and 6.y the lower cutter bar 92 is provided with a guide iiangre 101. which extends around the entire outer periphery thereot. cutter chain 103 is supported by the guide liauge 101 on the outer periphery ot the bar 92. The chain 103 at its inner end passes around the sprocket wheel 00 and is driven thereby by means of the Q;ear 79 and shaft 73. lu a similar manner an upper cutter chain 104l is mounted ou the upper ha r 91 and is driven by the sprocket wheel 77 supported in the upper hear 70. ll will he apparent that the entire cutter traine comprisiup' the

hars

90, 91 and 92 may be moved toward and trom the .

sg'irocket wheels

77 and 30 to adjust the tension in the chains 103 and 1011-.

The

bars

91 and 92 are each provided with central longitudinal slots 105 and 106 respectively. As shown in Fie'. 5 these slots extend throughout the Igreat r part et the outer portion oit the bars and are provided at one side thereof with chain `guides 107. vertically evtendinehar 103 (Figs. 3 and 5) connects the outer ends ot the

horizontal bars

91 and 92 and is secured in these bars bv arcuate members 109 'Formingr rounded corners between the vertical and the horizoi'ital bars. The chain guide 107 is continued around the corner inemhers 1 09 and extends vertically along` the bar 108. as shown in 5. lin this wav a loop nitride is provided over which cutter chain 110 passes in the form of ay loopa as shown in Fig. G. Curved corner plates 111 are positioned to guide the chain past the upper and lower ends of the upright 90. From the corner plates 111 the chain 110 passes inwardly and around a sprocket wheel 112 secured to the shaft 15 supported in the bearings 13 and tait. The chain l1() is of sufficient length to permit a slight dip in the loose run thereof above the sprocket wheel 112. This gives the chain a longer bearing on the sprocket wheel and also avoids the necessity for providing means for adjusting the tension of the chain. The sprocket wheel 112 and the chain 110 are driven by means of a worm 1 '13 secured to the shaft G6. as shown in Fig. 5. A clutch operated by a handle 114.- is provided for making and breaking the driving connection between' the shaft GG and the chain 110.

In Fig. 5'C l have shown a: clutch element 206 splined to the shaft t5 so as to be slidable into engagei'n'ent with the clutch element at the outer end of the hub 207 of the worm wheel 208 which meshes with the worm 113 mounted on the shaft 66. The lever 114- may bepivoted at 209 to suitable brackets 210 extending laterally from the worm gear casing 211. 1t will thus be seenv that when the clutch 206 is thrown in by means of the lever 1111. motion will be transmitted from` the shaft 66 to the shaft 45 so as to rotate the sprocket wheel 112 shown in Fig. 6, as well as in Fig. 5.

The arrangement of cutter chains described is especially useful in mining hard material such as hard coal. In mining material of this character some difticulty has been experienced in using a single loop cutter. The present invention overcomes this diiiiculty by providing independent chains for making the horizontal cuts at the upper and lower portions of the material being cut. This leaves only the vertical out to be made by the loop chain since the horizontal portions of this ch aint will travel in the korf alreadly formed by the horizontal; cutter chains. The particular arrangement of the chains relative to one another makes it possible to operate all of the chains by a single operating` mechanism, and to support all of the chains on a single cutter frame. By this arrangement the frame may be. made stronger and more e'liic-ient than would be the case if separatev guide frames were provided for the different machines. rllhe upright con-l nection for guiding the vertical run of the loop cutter forms a brace for the outer ends of the horizontal.l cutter arms and the horizontal cutter arms in like manner form a. substantial support for the horizontal runs of the loop cutter. The cutter chains are fed into the work by the rotary .movement of the cutter head about the support. prolasagne duced by the .rotation of the worm 68 in contact with the worm 5G in the manner ready described. The cutter is arranged to make a crescent-shape cut in a mine wall, as shown in Figs. 1 and 3.

For the purpose of renioving the coal. severed from the mine wall by the cutter chains novel mechanism is provided, as will be understood by reference to Figs. e, 5, 7, Si" and 9. Supported on the periphery of the table 116 are a plurality of short pivoted links 120. Pivotally carried by the outer ends of the links 120 is a vertically extending` horizontally curve/.l guard plate 121` and exten-fling horizontally from the lower edge of the plate 121 is an arcuate table 122. The upper surface of the table 122 is serrated. as shown in Fig. 9, with Vthe teeth of the serrations pointing rearwardly or away from the cutter frame. Mechanism to be described is provided for swinging the table 122 on its supporting links 120 to give it a reciprocatory motion toward and away from` the cutter frame. The driving mechanism is so arranged that a quick movement toward the cutter is produced while the movement away from the cutter is relatively slow. The effect of this reciprocatory movement will be to slide the table quickly under the material that has been severed by the cutter. the inertia of the severed material hol'ding it in place while the table is moved beneath it. On the slower return movement, however. the severed material will be carried back by the serrations on the surface of the table and will be eventually discharged from the table at the rear end thereof. It should be noted that the table 122 is of less extent angularly than the arc through which the cutter frame travels during a single operation. This feature is de! sirable in order that th-e cutter head1 includving the cutter fra-me and the table may be swung backwardly a sufficient. amount to, permit the cutter to be properly positioned to begin a cutting operation. lf the table were made of sumciently angular ext-ent to receive an entire section severed by a cutting' operation it would be difficult to get the cutter head into its initial position for starting a cutting operation because of the fact that the rear end of the table would bel swung into position to strike either a part of the machine frame or if the' frame were so designed as to leave a free path for the table the rear end of theV table would then` swing into position to strik-e the portion of the wall that is severed during the last partV of the cutting operation; It can be readily seenv` therefore, that a table of comparative-` to discharge the material as it is severed from the .mine wall and it is therefore not necessary for the table to he of sufficient extent to receive the entire body of severed material. After the cutter frame and the table 122 have reached approximately mid position, as shown in F ig. 4, the reciprocation of the table may be discontinued, if desired, and the material severed during the latter port-ion of the cutting operation may be allowed to remain on the table until the cutter frame is swung backwardly for a new stroke. 1f this is done the material on the table 122 will be carried backwardly at the same time that the cutter frame is moved to its initial cutting position and the material may then he discharged into the conveyor at the discharge side of the machine. It is not .necessary to operate the table in his way, however but the reciprocaring movement may he continued throughout the entire cutting operation. If this done a part of the severed material during the latter portion of the cutting operation will be discharged from the table 122 at a distance considerably removed from the receiving end of the transportation conveyor. This material will be picked up, however, during the backward movementof the cutter frame and will then be carried to a position where it may be discharged on to the transportation conveyor. its previously stated, the worm 681 for rotating the cutter head about the support may be given either of two operating speeds; the slower speed will be used during the forward movement of the cutter frame and the rapid movement may be used during the return operation. For reciprocating the table 122 a lever 123 is pivotally mounted at 124 on the table 46. The outer end of the lever 123 has piivotally secured thereto a link 125 which has one end pivoted to the guard plate 121 at 126. The inner end of the lever 123, as shown in Figs. 7 and. 8, is provided with two prongs 126 and 127. The prong 127 is offset downwardly and engages a. cani 128 mounted on the vertical shaft 73. The prong 126 engages a cam. 129 of a different shape which is integral with the cam 128. The

cams

128 and 129 are normally free to rotate on the shaft 73 but may be clutched thereto by a clutch 128 operated b a handle 129 pivotally supported from t e lower surface of the table 46, as shown in Fig. 7. A bar 126 is secured to the table 46 and passes over the top of the cam 128, as shown in Fig. 7, for preventing upward movement of the cam when the clutch 128 is operated. When the shaft 73 is rotated in a clockwise direction, as viewed in Fig. 8, the forked end of the lever 123 wiil be driven by the cam 128 with a comparatively slow movement tothe right during a half revolution of the shaft. On the second part of the rotation of the shaft 73, however, the forked end of the lever will be given a rapid movement in the opposite direc-tion1 being driven by the cam 129. This produces a rapid forward movement of the table 122 which is followed by the slow return movement produced by the cam 128.

To prevent the severed coal from Contact ing with the operating mechanism a guard wall 130 is positioned at the inner edge of the table 122, the wall passing just outside of the upstanding plate 121 to which the plate 122 secured. The guard wall 130 has its lower edge su'iiiciently raised above the base 32 to permit the cutter frame to swing beneath the wall, as shown in Fig. 6. The wall is supported by

brackets

131, 132 and 133, whichy are secured at their rear ends to the upstanding portion of the tilted frame 24 thiiough 'which the pivotal supporting pin 23 passes, as shown in Fig. 4. The base member 25, as represented also in Fig. 4, has a pivoted extension plate 134 and the wall 130 has a` hinged extension 135 which extends over the plate 134 and is held in place by a removable link 136. The purpose of the extension is to prevent coal which is severed during the latte-r portion of a eut from falling away from the position it occupied forwardly out of the path of the table 122. The hinged extensions 1,34 and 135 may be folded inwardly to permit easy transportation of the .machine when occasion requires.

The.. cutter chains when in operation remove considerable loose material in the form of coal cuttings or culm and this material is constantly drawn backwardly by the chains on to the rotary plate 32. In order to carry this material backwar'dly to a transporting conveyor a chain 137 provided with flights 138 passes around the sprocket wheel 81 and extends backwardly as shown in Figs. 5, G and 8, over a guide wheel 139 mounted at the rear portion of the machine. As shown inFig. 5 the ring 33 is discontinued to form openings 140 through which the chain 137 passes. A cover plate 141 is secured to the ring 33 to overlap the openings through which the chain 137 passes. The rear portion of the base plate 25 is provided with grooves 142 in which the chain 137 travels, and a plate 143 is fastened to the base plate 25 to form a cover for the chain 137. The coal cuttings or culm carried backwardly by the chain 137 is discharged at the end ol the chain into the same conveyor that carries away the coal from the table 122.

1n order that the base plate of the machine may tit tightly against the surface of the wall made by the last preceding cut this plate is provided with an adjustable extenw sion 145 which fits in a groove 146 extending along the side edges of the main base plate 25 and the arcuate front portion thereof` as best shown in Figs 6, 7 and 8. The hinged Fig. 8.

' will/first come into contact with the surmachine.

extensien 134 is attached to one side of the adjustable member 145, as Shown in Fig. 8. The rearwardly extending arms ot the extension 1:45. are-connected by a cross bar 147 as shown in Fig. .6, and in broken lines in A spring y1,48 has a plunger 149 which engages the cross bar 147 and normally tends to force the plate forwardly. When ,the machine is moved toi-ward to a new position the front edge ot the extension face formed the last preceding cut and will form a tight connection between the base plate ol.: the mining machine and the mine `wall and prevent any particles 0l. coal from dropping downwardly between the wall and the edge yoit the base plate. The spring 148 will hold the plate 145 resiliently against the wall and thus provide tor any slight inaccuracy in the positioning of the As shown in Figs. 1 to 4 inclusive, the lower end of the mining machine trame from which the material is discharged overlies the receiving kend oft a conveyorl()` supported for horizontal pivotal movement on a rearwardly extending portion oit the base member `2l. The material as it is carried backwardly and discharged from a mining machine is received upon the conveyor 150 which may be driven, as shown in ig. 1, by

a motor 151 and which carries the material to a position to be discharged into `cars or other transpbrting mechanism. The relation ofthe mining machine proper to its conveyor, as indicated in Figs. 1 and 2, is such that the conveyormay be swung into various angularhpositions relative to the direction ot movement of the mining machine in a mine chamber. This enables rthe operator to change the ldirection ot' an entry being driven by the machine without disturbing the relation between the machine and the conveyor. For instance, the machine may have been previously driving an entry in the direction of the broken line position of the conveyor in Fig. 1 and have been changed to the direction in which the entries were driven with the machine in the position shownv inthat view. This change in the direction can be accomplished while the .material continues to be removed along the old entry, as will be apparent trom an inspection o'fFig. 1,

.lnthemodilication o1:l the invention shown in Figs. 12 to 14A inclusive, the general construction is similar to that previously described. In themodiied form, however, the rearend ot' the machine isy pivotally carried by sliding blocks carried in upright frame members 161 and provided with threaded adjustingrods 162. The threaded rods 162 have beveled pinions 163 meshing with pinions 164 carried on a horizontal shaft 16.5. The shaft 165 is driven by a motor 166 connected to the shaft through a worm gearing 167. llllhere this construction is used the brackets .168 which carry the pointed anchor rods for contacting with the roof of the mine chamber to hold the machine in place are oiiset as shown in Fig. 12 so that the anchor rods will not interfere with the support l'or the adjustable pivot. is will be seen trom Fig. 13, when this form ot the invention is employed the cutting mechanism may be moved bodily to its upper position so that the upper cutting chain will cut the coal trom the root oit the mine with a smooth cut in an approximately horizontal plane instead ot leaving portions ot the coal. adhering to the roof as is done where thc cutting head is tilted about a stationary pivot into its upper cutting position.

The table 17() employed in the form shown in Figs. 12 and 13 is slightly dii'erent from that or the other views in that it is not given a short reciprocatory movement but is ted vforwardly with the cutter frame until a portion of thematerial being severed has become detached trom the mine wall. The table is then moved backwardly carrying with it the severed material which is discharged from the table while in its retracted position. The table is then moved forwardly and receives another portion 0f severed material, the operation being repeated as many times as is necessary to carry back the material severed by a complete cut. The table is pivotally connected by an arm 171 to the central vertically extending sleeve 172 which corresponds to the sleeve 37 ot the 'torni previously described. The table is supported beneath the shelt` 173 which carries the motor and other operating mechanism in a manner similar to that described in connection with the other form ot the inventioi'i. The/arm 171 is held to the lower end ot the sleeve 172 itor pivotal movement thereon by a l'lat ring 174 and lag screws 175. A. threaded standard 176 extends through the sleeve 172 in a mann-er similar to the standard 53 in the previously dew scribed form ot the invention. The inner edge ot the table 170 is provided with a flange ring 177 which carries rollers 178 arranged to travel on a tlat ring 179 corresponding to the ring oli the previously described form. The ring 177 is provided throughout the greater part 0In its length with rack teeth 180 arranged to mesh *withy a pinion 161 driven by a motor 182. `By` means ol this motor and the gearing described the table 170 is operated for transferring the coal trom its severed position to its discharging position. A scraper 183 is provided ttor removingthe coal .from the table 170 as the table ismoved forward at each operation 4'to receive a new load. This scraper 183 is pivoted at 184 and is provided with a toe 185 which strikes against teu the abutment plate 186 to limit the forward movement of said scraper to its full .line position shown in Fig. l2. The scraper is free to be swung backward by the backwardly moving load, but when the latter starts forward again the scraper 183 automatically engages the load and prevents it from moving forward with the rotary carrier 170. ln the next retraction of the latter with a load the previous load is pushed along into the hopper and onto the pivoted rear conveyor.

l claim:

l. ln a mining machine, the combination with a main supporting frame, of a supplemental frame pivotally connected at its rear portion to said main frame in a relatively low position, means mounted on the forward end of said supplemental frame for dislodging material from an upriffht mine wall, a supplemental support connected to said supporting frame in position to extend forwardly therefrom along the door of the mine chamber, means connected between such ilf'orward extension and said supplemental frame for assisting in supporting the latter, and means for adjusting the height of said adjusting mechanism by swinging said supplemental iframe on its pivotal support relatively to said main frame.

2. The combination with a supporting frame having a narrow forward extension at its lower portion, of a mining machine pivotally connected at its rear portion to said supporting frame, means connected directly between said narrow extension and the forward portion of said mining machine Vlr'or supporting the latter in an elevated position on said extension, and mechanism -for adjusting the elevation of the forward portion of said mining machine.

3. The combination with a supporting Ytrame having a lower forward extension, of a mining machine pivotally connected to said supporting frame and extending forwardly over said extension, an auxiliary support connected to said mining machine, and a slidable connection between said auX- iliary support and said forward extension.

4l. The combination with a supporting frame comprising upright spaced apart standards and a lower forward extension adapted to occupy a position substantially at the floor of a mine chamber, of a miningmachine pivotally connected at its rear end portion between said standards and extending forwardly over said extension, an upright standard connected between the forward lower portion of said mining machine and the forward upper side of said eXtension. and means for adjusting said mining machine on said upright standard relatively to said forward extension and moving said mining machine about its pivotal support as an axis.

The combination with a supporting frame comprising spaced apart 'ujlnigi'it standards and a lower forward extension, of a mining machine pivotally connected at its rear end portion between said upright standards and extending forwardly above said extension, means for supporting said mining machine above said forward eXtension, said last-named supporting means being connected between the forward end portion of said extension and the bottom side of said mining machine intermediate its ends, and means associated with said last named supporting means below the top of the mining machine for lifting and lowering the forward end of said mining machine while the rear portion thereof is supported by said pivotal connections to said upright standards.

6. The combination with a supporting frame having a forward extension adapted to rest on the floor of a mine chamber, a mining machine pivotally connected at its rear end portion to said supporting iframe and extending forwardly therefrom over said extension, and a supplemental support for said mining machine pivotally and slidably connected to said extension.

7. The combination with a supporting frame having a forward extension extending over the mine floor and along the same, of a mining machine pivotally connected at its rear end portion to said supporting frame, a supplemental' support for said mining machine, a slide block pivotally connected to the lower end of said supplemental support, and means for guiding said slide block forwardlyV and rearwardly on the forward end portion of said extension while preventing lateral increment ol said supplemental support relatively to said extension.

8. The combination with a supporting frame comprising spaced apart upright standards and a forward central extension` of means for anchoring said supporting frame between the floor and roof of a mine chamber with said extension projecting forwar-diy over the mine floor, a mining machine pivotally connected at its rear end portion between said upright standards and extending forwardly along said extension and above 'the same` an ujn-ight standard connected between the forward end portion of said extension and the lower side of said mining machine intermediate its ends, and means associated with such upright standard for adjusting the elevation of said mining machine while being pivotally supported at its rear end by the pivotal connection in said spaced apart standards and while being supported at its forward portion by said upright standard.

9. ln a mining and loading machine, the combination with a supporting frame, of a conveyer pivotally connected to Said supporting trame in position to extend into a mine car on a mine track while said support ing` trame is adapted to swing angularly to various adjusted positions on the mine floor, a supplemental trarne mounted on said supj'iorting trame to extend in a general horiaontal direction in a mine chamber between the floor and root thereof, cutting mechanism mounted on thc forward portion of said supplemental trame in position tor op crating on the upright mine Wall between said tloor and root, and mechanism for delivering cut material trom the mine Wall to said conveyer in the various positions to which said supporting trame is adjusted on the mine floor While said conveyor remains inposition to deliver material to a mine car on the same mine track.

l0. The combination with supporting trame-Work approximately circular in plan, ot core cutting mechanism mounted on said framework, means tor operating said core cuttinfr mechanism to cut crescent-shaped cores trom a mine Wall adjacent said trameivoi'k in a geiieral horimiital direction. said framework and said cutting mechanism being readily shittable to vary the direction ot the movement of the cutting mechanism tek a new position, a conveyor connected to said framework tor movement horizontally about one end oli' said conveyer to various angular positions relatively to said tramework, and mechanism tor delivering the out material to the conveyor in, its various angie lar positions relative to said framework.

l1. The combination with a supporting traine adapted to rest on the floor o'lI a mine chamber, of a supplemental trame mounted on` the forward portion ot said supporting 'lrame and extending` :forwardly theretrom, said supplemental trame being approximately circulaiin plan, of core cutting` inmehauism mounted on said supplemental trame, means for operating said core cut-- ting; mechanism to cut a crescent-shaped core oli material trom a mine Wall iny a general horizontal direction, means tor transferring the core ot material from. the mine Wall along said supplemental trame over the rear discharge end thereot, and a conveyor pivotallyi connected to the rear portion ot said supporting1 trame Yfor angular adjustment horizontally relative to said supporting iframe Without altering its receiving position relative to the discharge end ot said supplemental trame.

l2. In combination, miningmachine head, a loop core cutter carried by said head tor movement about an upright axis, anv

arcuate table, means for moving said table in the kerf formed by said cutter, and means for reciprocating said table to` transfer material severed by said cutter While said table remains in position in the cut made-by said cutter.

lil. ln combination, a mining machine traine, a cutter head carried by said trame, :i loop core cutter carried by said cutter head tor rotation about an upright axis, an arcuate table ot less extent angularly than the ai'igular rotation ot said cutter' during a cutting operation, and means for operating said table relatively to said cutter to remove the material severed by said cutter a part at a time.

ist. ln combination, a miningmachine frame, a cutter head having a loop core cutter carried by said trame, an arcuate carrior having an angular extension oli less than i800, and means tor moving said carrier independently ot the movement ol said cutter including movement ol. the carrier into the lferl" termed by said loop cutter to receive a load ol material.

l5. In combination, a mining machine iframe, a cutter head having a loop core cut t r carried by said cutter head and movable into the kei-t Formed by said loop cutter, and means tor in'ipartingv short reciprocations to said table relative to said cutter head.

16. In combination, a mining machine trame having a cutter head provided With a loop cutter, a table tor receiving material severed byi said cutter, links for movably securing said table to said cutter head, and means it'or imparting short reciprocatory movements 'to said table, the movements of said table in one direction being comparatively rapid and in the other direction comp aratively slow.

l?. ln combination, a mining machine iframe, a cutter head carried by said frame, core cutting mechanism carried by said cutte head, means tor receiving material disconnected by said severing mechanism, said receiving` means being arranged to transport said material While said means remains in receiving position.

18. In a mining machine, the combination with a supporting trame, oit core cutting mechanism having an unobstructed core opening therethrough. and mounted on said trame lor arcuate movement relatively thereto on an upright axis, means for operatingr said core cutting mechanism including arcuate feeding movement thereof on such upright axis While said frame remains in stationary position to effect the cutting of a core in a general horizontal direction, a device mounted on said frame 'for movement relatively thereto in position to extend into the kert formed by said cutter for receiving the core material, and means tor operating said device While in receiving position for transporting the material received thereon.

19. In combination, a mining machine frame, a loop core cutter carried by said frame for rotation albout an upright axis, a device for receiving material severed byy said carried by said trame, an arcuate tabley v IQ cutter, means for moving said device into the kerf formed by said cutter during a cutter operation thereof, and means for operating said device While in receiving position for transferring` material received thereon.

20. ln combination, a mining' machine frame, a cutter head carried by said frame for rotation about an upright axis, a loop core cutter carried by said cutter head, an arcuate table carried by said cutter head and having its forward end positioned adjacent the rear portion of said loop cutter, and means for imparting a reciprocatory` movement to said table relatively to said clutter head to transfer material received on said table.

Qi. ln a mining;- machine, the combination with a supporting frame, of mechanism mounted. thereon for movement relatively thereto to dislodge material from an upright mine Wall, `a. ring sector plate mounted on said frame for movement relatively thereto with its upper surface in a generally horizontal position to receive the severed material and carry the same by gravity on such upper surface, and means for operating said sector plate for transferring` severed material toward loading' position While said plate remains in receiving position.

22. In a mining' machine. a cutter, means for operating said cutter to sever material from its native bed, a table for receiving,v the material so severed, means for rotating said table and said cutter about a common axis, and means for imparting a reciprocatory movement to said table independent of said rotation about said axis.

23. ln combination, a mining machine fi'ame, a cutter mounted on said frame for rotation about an upright axis, an arcuate table, means for moving said table about the axis of said cutter into the lrerf formed thereby, and means for imparting a reciprocatory movement to said table independent of said. rotation about said axis to operate said table to transfer material thereon while said table remains in position adjacei'it said cutter.

24T. ln a mining machine, a cutter head rotatable about an upright axis, severing' mechanism carried by said cutter head, a table for receivingr material disconnected by said severing' mechanism from its native lied, links connecting said table to said cutter head to permit said table to reciprocate relative to said cutter head, and mechanism for impartingl a rapid movement of said table relative to said cutter head tovvard said severing' mechanism, and a slower movement of said table in an opposite direction.

25. In combination, a supporting frame, a cutter head cari'ied by said frame for rotation about an upright axis, a cutter secured to said cutter head for rotation therewith,

an arcuate table carried by said cutter head, and having` its forward end positioned ad jacent to the rear portion of said cutter', links connecting,` said table with said cutter head and arranged to permit reciprocatory movement of said table relative to said cutter head, and mechanism for operating said table and arranged to impart a rapid movement of said table toward said cutter and a slower movement to said table in an opposite direction.

26. In a mining machine, the combination of a core cutter having a single cutter frame with an unobstructed core opening therethrough, and a plurality of spaced apart plane kerf cutters carried by said frame in position to assist said core cutter in cutting a core extendingtlirough such unobstructed core opening` and through the space between said spaced apart plane lrerf cutters.

ln a mininI machine, a loop cutter comprising a U-shaped frame, a cutter chain carried by said frame for severing material along the exterior portion of said frame, and separate cutter chains for forming a lrerf for the inward and outward runs of said first mentioned chains.

28. In a mining` machine, a loop core cutter comprising' a frame movable about a central axis, a cutter chain for formino' a kerf at a por-'tion of said frame removed from said axis,and a separate chain for forminga kerf extending away from said axis toward said exterior portion of said frame.

29. ln a mining machine, a loop cutter comprising' a Ushaped frame movable about a central axis, a cutter chain for severing material along the portion of said frame removed from said axis, and separate cutter chains for severing' material along the portion of said frame extendingr between said axis and said removed portion.

30. In a mining machine, the combination with a cutter frame having` an unobstructed core opening therethrough, of a chain cutter mounted on said cutter frame to travel around said unobstructed core opening' ti ansversely of the direction of' feed of said cutter frame, and spaced apart chain cutters mounted on said cutter frame to travel about spaced apart portions thereof in spaced apart planes parallel to the direction of feed of said cutter frame.

3l. In a mining machine, a loop cutter comprising' a U-shaped frame movable about a central axis, a cutter chain for severing' material along,` the portion of said frame rel moved from said axis, and separate cutter chains for forming lrei'fs .in which the inward and outward runs of said first mentioned chain move.

32. In a mining machine, a cutter frame provided with a cutter arm having` a slot lll) therein, a cutter chain carriedby said arm in position to form a kerl: therefor, and a `second cutting mechanism including a cutter I carried by said arm and extending angularly therefrom, and a second cutti ng mechanism including a cutter chain n'iovablev along said guide-bar duringa portion oi" its travei 'and movable .in thel kort formed by `said `iii-st core cutter mounted on said trame and hai'- cutter chain during another yportion oi'its travel.

Saa In :L n'iining ifnachiine, a cutter -coinprising a single trame, a plurality ot chains carriedfbyfsaid iframe andso lai-ranged that Ione of said chains travelsin the plane of vcutter carried by said trame and arranged to form a kerf inf which said chainianoves yduring a portion of-its travel.

36. In' a mining machine, a rloop cutter `comprising a trame, a pair of arms ln'Lving 4slots therein and a bar-connecting said arms, a cutter chain movable along said `bar tor forming a `kertin material to be mined but movable inthe slots in said arms during a portion of its run, and independent `cutter cha-ins forforming lerfs tor said arms.

37. vIn a miningmachine, a loop :eut-ter `comprising a cutter ftramehaving ysubstantially parallel` arms connected at their outer ends by a guidebar, 'a cutter chain moyal'ile along sai d connecting guide-bar loi' toi-nung a-l hert-in materialto be severed and` n'ioval'ile in slots in said armstoward and away from said guide `bar,-and independent entier chains carried `by said arms tor 'toi-ming ker'fs in said material througlr which said arms may move.

38. In a mining n'lacaine, the combilmtion with cutting mechanism, ot :L -hase plate 'for receivingcut imLtcriahand aresiliently movable `extension 'for usaid base plate arranged to contact with the wall ot a mine chamber to make close `connectimi between said Wall and said base plate.

39. In mining- 1nacliinetl1e combination with cutting` mechanism, ot a platform tor receiving cut material, an extension'carried by saidl platform iter sliding movement relative thereto, and a spring :tor holdingsaid extensionresilicntly in contact with the wall of the mine chamber.

40. In a mining machine,fthe combination with cutting mechanism, of a platform having an arcuate periphery, an extensionl plate fitted to sz'Lidpei-iphery and Iarrangedl'to contactwith the wallet' a-mine chamber, andy resilient means for yforcing saidl extension plate into'contactwith said wall.

41., In a mining machine, a platform-.having a groove in thev periphery thereof, an extension plate supported in said groove ft'or contactingwith the wall o'lithe mine chamber, and a spring-for orcingsaid extension plate into contact with the wall o't :said chan'iber.

42.'. VIn. a mining machine, the combination with.v asupporting i?i'aine, of a loop chain ing an unobstructed core `opening 'therethrough, a plane korf cutter associatedi with. the lowcr'run ot said loop Achain core cutter,

iandf'ineans .mounted onfsaid trame inposi- Amechanism ishavingfnan unobstructed core opening therethrough. and'mounted `on said traimei .for swinging feeding movement on an `upright L axis, loading apparatus for transferring the :cut core material from ythe mine wall ytowardy lloading position,fvsaid loading apparatus comprising a ringfsector plate mounted @on -saidframe imposition to `extend underfthe` eorermaterial, andi a conveyor onsaid `frame travelingover.` a position :adjacent thef'lower inner portion ot said 'core' cutting mechanism for receiving the cuttings from the latter` duringfits arcuate' ieedine" movement about the :said u3- right axis and transfer such cuttings away `from thev mine" wall.

"-flt. In a mining machine, the combination with a supporting' vframe comprising` a platform, of loop chain core cutting Imeclmnism mounted on said'iramewith its lower" run taveling toward said platiiorni and adjacent the Yforward end thereof, a plane hert cutter associated 'with said lower run, and a conveyor movable over said platform to remove thc cuttings deposited-hy said loop chain core cutting mechanism and by said plane kert cutter and transfer such cuttings toward the rear portion of said support-ing frame.

45. In a mining machine, the Lcombination with a supporting frame, otl core cutting mechanism havingl an unobstructed corel opening therethrough `and mounted on said iframe in position to cut a single core extending in a generally horizontal direction through said unobstructed core opening, a plane .hert cutter associated with said L'core cutting mechanism, and a conveyorinounted on said iframe in vposition to receive the cuttings from' said core cutting mechanism and .trom said plane hert cutter and transfer such cuttings toward loading position.

e6. In a mining` machine, the combination with a supporting trame, of a base plate mounted thereon, a standard mounted on said base plate, cutting mechanism carried by said standard, a supporting screw for said standard, an adjustable nut carried by said sere-iv and arranged to support said standard and said base plate, and means mounted on said supporting` frame for holding said base plate and said standard trom tipping relatively to said sup porting frame.

4f?. In a mining machine, a Jframe, means for pivotally supporting said 'trame at one end thereof, a circular plate rotatably mounted in said ,trame at the other end thereo'l, cutting mechanism carried by said plate, a standard connected with said plate, and means tor adjusting said plate and cutting mechanism on said standard.

4128. In a mining machine, a circular plate, a frame carried by said plate, severing mechanism mounted on said frame, a standard for supporting said trame and severing mechanism, means for adjusting said 'trame along said standard, means for rotating said 'frame relative to said 'standard, and means for cooperating with said plate to preventtipping of said trame and severing mechanism.

di). In a mining machine, a frame pivotally supported at one end-thereof, a circula guideu'ay at the opposite end ot said traine, a plate rotatably mounted in said guideway, frame members secured to said plate, severing mechanism carried by said trame members, a Standard projecting through said plate and connected with said trame members, and means connected with said standard for adjusting said severing ineehanisi'n along said standard and tor rotating said severing mechanism about said standard as an axis.

50. In a mining machine, the combination with a cutter trame, oiE a chain cutter mounted on a portion of said cutter trame to travel around the same in position to cut a plane hert in a mine Wall, an additional chain cutter mounted on said trame to travel about another portion thereof hav ing an unobstructed core opening extending therethrough, means comprising a. drive wheel mounted for rotation on a horizontal axis to actuate said core chain cutter, mechanism comprising a diive Wheel mounted tor rotation about an upright axis to actuate said plane kert cutter, ieans tor controlling the actuation of each ot' said chain cutters independently ot the other, a. supporting trame for the aforesaid parts, and means ilor ellecting teeding movement ot said i'irst named Ytraine during the actuation ot said chain cutters to cause said chain cutters to cut a core oi? material in a mine Wall in a general horizontal direction.

5l. In a mining machine, the combination with a, supporting frame, of a chain cutter drive wheel mounted on said frame tor rotation about a horizontal axis, a pair ot' chain cutter drive wheels mounted in spaced apart relation on said frame for rotation about a common upright axis, three chain cutters connected respectively to said drive Wheels for actuation thereby, and a, cutter frame common to said chain cutters for guiding the latte-r tor actuation by the respective drive Wheels. said common cutter 'trame having an unobstructed core opening therethrough, and means for operating` said chain iuttei's including teeding movement ot said common cutter frame and actuation ot said chain cutters by means ot said drive Wheels to effect the cutting ot a core of material extending through said unobstructed core opening.

52. In a mining machine, the combination With a cutter head, ot a core cutter carried by said cutter head and comprising a trame, a chain guided on said frame in an upright loop having an unobstructed core-opening therethru, a second chain in the plane of a predetermined run of said lirst named chain and surrounding such predetermined run, and means for operating said chains.

53. In a mining machine, a cutter head, a loop cutter tor said cutter head comprising an upright rectangular frame member, a cutter chain guided in an upright loop about said frame member, independent cutter chains guided in horizontal loops on the upper and lower portions ot said frame member, and drive Wheels toioperating said cutter. i

541i. In a mining machine, a cutter head provided with a loop core cutter comprising a substantially rectangular closed trame member having an unobstructed core openA ing therethrough, and a plurality ot endless chain cutters carried by said trame member and arranged to travel in planes arranged iii different angular positions relative to one another.

55. In a mining machine the combination a cutter head, of a core cutter mounted on said cutter head and comprising spaced apart plane korf cutters and an intermediate loop chain cutter having an unobstructed core-opening therethru, and means tfor operating said core cutter.

56. In a mining machine, a cutter head. a. loop cutter for said cutter head provided with a cutter frame, endless chain cutters carried by said cutter traine and arranged in planes substantially at right angles to one another, drive Wheels tor said cutter chains. and means `tor changing tho position of said lll() cutter-frame relative to said cutter headv for adjusting the tensioninsome ofsaid cutter chains. i

57. In a mining machine, the combination with.A asupporting' fframe,l of aminingmachine iframe'pivotallysupported at one end thereof onsaidsupporting frame, a standard/projecting upwardly from theiforward portion-of'said support-ing` frame, a cutter head, means for supporting saidfcut-ter head on said upwardly projecting standard for adjustment vertically Eon. said i standard, iand `.means `torconnectinghsaid cutter head-.to

said mining vmachine frame for holding `said ycutter head from tipping yrelatively to said mining Amachine frame.

58. In combinatioma mining machine frame, means for pivotally f supporti-ngwsaid vtrame at one endthcreot, a cutter head loi cated atthe end of said frame opposite said `.pivotal support, an upright,standard., fmeans for supporting'said cutterwheadV on said v.standard-means for `adjustiing said cutter frame,v a cuttter vhead rotatably secured to -said mining ymachine frame, an upright `sleeveforn'iing part offsaiid cutter head, a supportingstandard positioned in rsaid sleeve, a nut carried `by said `standard for supporting` said sleeve, vmeans for rotating said `nutrelativeto :said vstandard for Aadvj-ustingwsaid sleeve and cutter head vertiically, means for' securing 1 saidv nut against vrotation .-relative -to` said standard and means cooperating with said nut forfiiotatl:ing -.said `cutter head -vrelative to Lsaid standard.

GO. In combinatiom: aizmining umachine frame, means foi-]'iivotally :supporting said .frame at one end'thereof, a cutter :head carried' by said `finu'ie'at thc other end'tl'uxreof andv rotatably secured thereto, a standard for lsupportingsaid cutter head, a sleeve `carried byvsaid nutten head in which said standard -isfpositioneth a nut?threadedon saidstandard, means for rotating said nut to `adj-ust saidcutter headivertical-ly along` said standard, Aand means for holding said= nut against rotation t0 causesaid cutterrhead to-rotate in sa=id mining:machine yframe and about said standard :as an aXis.

6l. In a vmining machinepthe eonibination with a base frame having rigidly connected thereto a forward extension adapted to be located substantially. onthetloor of a mine chamber, of vmeans for engaging the roof of a mine chamben for holding said base frame including. said iforward` extensionv firmly in adjusted. posit-ion, a main vfname adjustably mounted onsaid .base ,frame,.cutting apparavtus=mountedjon said main frame and-,mov-

able -bodily up and; down therewith, means mounted directly on said forward extension` imposition to 'support' the forward` portion ofisaid main fname and the cutting apparatus, and mechanism for adjusting the .height ofsaid cutting appanatus.

62. In. a .mi-ning machine, lthe combinationwithy a base frame having` awforward extension and upright standards, of a main frame vpivotably and slidably y connected :to said` upright standards, cutting. ,apparatus carried by the.forwarfdwportion of saidl main fname a support vfor the forwardportion of said main frame, a pivotal andslidable 4connection between i said last-married support tion .with `cutting apparatus, ofsupporting frame-work. therefor,.-means comprising a screw-threaded standard` and. a-.circular nut thereon for. adjusting` the/position `ofisaid cutting n apparatus; .means for locking said -nut 1onsaid standard' to` prevent the nut from turning` andto hold the cutting` apparatus in adjustediposition .andI `feed gearing associated with said min-saidvfeed gearingbeing made operative bythelocking of saidwnut to ,effect the feed= of said cutting apparatus.

(35. In aminingmachine, the combination with a plurality of spaced. apart parallel korf cutters, Aof `an intori'nediate .looped chain core cutter havingfuppeu andvlower runsrespectively.within the boundaries of' saidskerf cutters, and means :for operating;l including thefeed of said .kerf cutters :and said|` looped Achain core cutter.

' (5G.l In auniningamaehine, the combination with a main frame, of a supplemental fra-me pivotally mounted von y said rmain frame, spaced apart plane lrerf cutters,an

intermediate loop chain core cutter having an unobstructedcore opening therethrough, means forwsupporting said plane kerf cutters and said intermediate loop chain ieore cutterin position to cooperate with each other-in cutting` a core of material entending through said` unobstructed coreopening `and :through the space ibetween said spaced yapart vplanerkerf cutters, and means for operating said plane kerfcutters and said loop chaincane cutter `including swingflll)