USRE17305E

USRE17305E - Apparatus

Info

Publication number: USRE17305E
Authority: US
Publication date: 1929-05-28

Description

N. D. LEVIN COAL MINING APPARATUS May 28, 1929.

Original Filed Jan. 5191? 7 Sheets-Sheet 1 A TTORNEY.

INVE TOR. afia AM PKTNESSES N. D. LEVIN May 28, 1929. Re. 17,305

con. MINING APPARATUS driginai Filed Jan; 5, 1917 7 Sheets-Sheet z [N VENT OR.

A TTORNEY.

May 28,1929. Re. 17,305

COAL MINING APPARATUS Original Filed Jan. 5. 191 7 She ets-Sheet 3 W 7 m messcs: W

A TTORNEY May 28, 1929..

N. D. LEVIN COAL MINING APPARATUS Original Filed Jan- 1917 Sheets-Sheet 4 WITNESSES: 'z "a aw J7 up 1.5

J6 a INVENTOR.

. Maxwr I-J L. L; ATTORNEY.

May 1929. N. D. LEVIN COAL MINING APPARATUS Original Filed Jan 1917 7 Sheets-Sheet 5 em .Y

00 QZVLNTOR.

ATIORNLY '7 Sheets-Sheet 6 INVENTOR. nu-0&0; 5 ATTORNEY.

y 28, .1929. Re. 17,305

COAL MINING APPARATUS Original Filed Jag. 5, 1917 7 Sheets-Sheet 7 .9 7 28 f 730 52 so 7 19 11 i .1 ll

o 0 55- 1 '58

g O d7

82 ,7,

1' a5 2 J J I INVENTOR.

ATTORNEY:

11 1 of construction and effective and ellicient in NIL-S .1). LEVIN,

ReissuedMay 2S,il929ki I i coat-Minnie APPARATUS..

Original application filed January 5, 1917, Serial No. 140,749: Renewerl August 29, 1924 Original Noi 1,638,447, dated Aug'ustB, 1927. Application for reissue filed October 22, 1927. Serial No. 228,088;

"This" invention'relates to certain new and, useful improvements 111120211 'm1n1ngappa-" ratus and particularlyto that class of apparatus whereby, sectionsare/completely severed from the mass of the coal vein and deposited inconv'eniently disposed receptacles fortransport from the mines.

I The especial object of this 'nventionis to provide amachine of the class described which shall he simpley durable and reliable v operation.

Tliedevices'by which I attained this ohect are fully set forth in the followingspecr fication andil'lustratedin theaccompanying drawings of which I Figure 1 isa plan view of the preferred embodiment of my invention. I Figure 21s'a's1 de elevationof the machine I illustrated in Figure 1.

Figure Sis a verticalcross section taken along the line3 3 of Figure 1.

Figures 1s a diagrammatic Slflfl elevationa'l view showing the methods of removingthe upper part of the coal vein .Figures 5, 6, 7, and 8 are diagrammatic plan views showing methods of operating line let- 14 of Figure 10. w

ing, of, the guide sheaves .over

the machine.

of the machine.

. Figure 10 is a sideelevation of the machine illustrated in Figure 9.

Figure 11: is a verticalcross section taken 2 is a fragmentary Figurel urea.

Flgure 13' 13 a sectlon along the, line 1313 of'F1gure9'. l

lligure 14 is a transverse section along the along the line 16-16 of Figure 9. Figure 17 is a detail of the hydraulic ing mechanism connected with the cutting devices. a p I Figure18 is a detailofthe pivotalmountrope is lead from the winding drum.

Figure a fragmentary longitudinal section along the line 1515 of Figure 14' Figure 16. atransverse verticalsectionwhich the feed s a n:

frameof the machine to prevent rotation relative to-the supporting base.

Figure 20 isa detailofa detachable guide sheave. I a I Figure 21 1s a' diagrammatichplan view showing the method of operating the ma- I cutter frame disposed ina vertical plane; and.

adapted, when the turn table is rotated, to form akerf in the mine wall extending above;

or coL'UMBUsoHIo, Assrononro JEFFREY MANUFACTURING COM- 'LPANY, or connmnns, 01110, A oonronmrronor 01x10.

"behind, and below a section of coal to com pletely sever it from the mass of the vein, v

and asystem of conveyers adapted. to receive such severedsections of coaland trans port them. to the rear ofthe machine to he deposited" in conveniently placed cars for transport from the mine. Upon this turn table is also mounted feeding devices by I p which the turn table may be rotated in either Figure 9'is a plan viewof @IIIOCllfiQZ'ttlQID direction and'by' which the entire machine may bemoved relative tothe coalface.

engaging the stud3' about which said base plate is rotatable, forming a turn table upon whichthe operating parts of the machine are mounted. Attached to the base plate l is a motor 6 which supplies power to actuate the machine. For purposes of illustration, I have shown an electric notonbut itfis'to be 1 borne in mind that any type of motor may be employed which is suitable to the 0011- I dition under which the machine operates.

Formed on the frame ofthe m0tor 61are journalhearings 7 in which are mounted the trunnion's 8 and 9 of-thecradle casting 1O upon which is carried thecutting mechanismv and thegathering devices of the machine as w ll, esit te;asset.slamme in.

bearing formed in the trunnion Sand a sec ond bearing 11 supported on apedestal of the base plate 4 is a transverse shaft 12 from which the several elements of the machine are actuated, and which is itself driven through the spur gear 13 and armature pinion 14 from the motor 6.

The cutting mechanism comprises a vertically disposed loop shaped cutter frame 15 upon which travels a chain having renewable cutter bits adapted to cut a kerf in the coal body above, behind, and below sections of the coal vein to entirely sever them from the mass of the vein. The cutter chain '16 is of a type well known in the mining machine art, consisting of alternate strap and block links, and is engaged by a sprocket wheel 17 mounted upon the power shaft 12. Upon the hub of the sprocket wheel 17 is formed clutch teeth 18 adapted to engage with similar teeth of the clutch member 19 splined to the shaft in the manner common to such clutches. Formed upon the block links of the chain 16 are laterally projecting sockets 20 in which are secured the renewable bits 21-.

The cutter frame is formed of a steel bar.

'22 of rectangular cross section to the sides of which are attached plates 23 the projecting edges of which form the guideways in which the chain 16 travels. The rectangular bar 22 is bent to form four sides of a pentagon and is secured at both ends to a vertical plate 24 which forms the fifth side of the pentagon and is attached by suitable bolts to the vertically extending flange 25 of the cradle casting 10. The cutter frame thus formed is adapted to rotary movement about the trunnions 8 and 9 and is so formed that when in its lower position the lower side 26 of the pentagon will be parallel with the general direction of the coal seam at the line of the floor, and, when in its elevated position, the upper side2? of the pentagon will be parallel with the general direction of the coal seam at the line of the roof of the mine. lVhen the mining machine is placed adjacent the coal face andthe turn table 4 is rotated in a direction to cause the cutter bits 21 to engage the coal, there will be formed a loop shaped kerf extending above, behind, and below asection of the coal, entirely severing said section from the body of the vein. ()wing to the natural cleavages of the coal, however, this severed block breaks off into smaller fragments of suitable size to be conveniently transported from the minea and I haveprovided a gathering mechanism adapted to receive such fragments and convey them rearwardly of the machine. This gathering mechanism comprises a conveyer 28 of well' known type mounted in the cradle casting 10, its forward end extending parallel with and in the same horizontal plane as the lower side 26 of the cutter frame to which it is attached by a broad apron 29 adapted to extend into the kerf to receive the fragments of coal as they break down. These fragments of coal are moved across the apron by the movement of the apron relative to the fixed body of coal by which they are pushed onto the conveyor to be carried rearwardly of the machine. The conveyer .28 comprises a trough composed of

bottom plates

30 and 31 secured to side plat-es 32 by suitable angles 33. The angles 33 form guideways for the conveyor chain 34 and protect them from the material traveling in the conveyer trough. The chains 34 are connected at convenient intervals by cross bars 35 serving as scrapers to move the material along the trough of the conveyer. This trough is divided at the line of the trunnions 9 and 10, the rearward section 36 being supported in a horizontal position by the bracket 37 attached to the motor frame, while the forward section 28 maintains a fixed relation with the cutter frame. Mounted in V bearings 39 of the bracket 37 is the head shaft 40 of the conveyer, to which is attached the head sprocket wheels 41 which engage the conveyer chains 34 to drive them. Mounted upon the overhanging end of the shaft 40 is a sprocket wheel 42 connected through the chain 43 with a sprocket wheel 44 fixed to the power shaft 12. A suitable clutch 45 is provided by which the sprocket wheel 42 may be connected to the head shaft 40. This clutch may be of any convenient type, but I prefer to use a clutch of the well known multiple disc friction type having a hand wheel '46 by which the pressure upon the disc of the clutch may be controlled to drive the conveyer and which, by the slippage of the disc, will prevent the breaking of the parts should'the conveyer become jammed.

Pivotally mounted upon a circular extension 47 of the base plate casting 4 is a secondary conveyer 48 adapted to receive material from the gathering conveyer 36 and to convey it to suitably placed cars 49 in the rear of the machine. At its forward end this conveyer 48 is attached to and supported by a circular hopper casting 50 provided with a central hub 51 in which is fixed the pivot pin 52 about which the conveyer is rotatable. The pivot pin 52 extends through a central. aperture in the base plate extension 4'? and is provided with a broad head 53 adapted to engage the under surface of the base plate extension to resist the upwardthrust of the pivot pin. The hopper casting 50 is provided with rollers 54 adapted to travel upon the faceof the extension 47 and act as a fulcrum to support the overhanging weight of the conveyer. The conveyer 48 is provided with an auxiliary motor 55 by which it is actuated independently of the motor 6. The construction of this secondary conveyer 48 is similar to that of the gathering conveyer, and as its details form no part in the present invent-ion, further description is inotthought tofibe necessary at this time.

this *niethod'of mounting the 1 secondary con veyer operative relations are preservedbe rope 57'. This feed rop ej57 is adapted to pass "around suitable guide sheaves 58, 5 9 and" and bec onne cted to :a suitable anchor 61 at- I *1), cut it. 1

taclied to th'ebaseplatev 1., 'When the rope 57 is wound upon the drum 56 theturn table t.

will be caused' to'rotate about. a pivotstud 3 to cause the cutter bit-s21 to'engage the coal The" win ding druin -56 of'the base plate; and isconnectible there- .with by a multiple disc frictionclutchcon tained within thebody'of the drum 56 and controlledby a handwheelf 64 in the manner common with such clutches. Attached to the shaft 62at its lower ends'is'a'wormgear'65 which engages with a suitable worm 66 attached to a transverse shaft 67. 3 The shaft 67 is supported'injournal bearings 68 0f the base plate J: and to its farther end is secured aratchet wheel 69, Mounted upon theshaft 67 "at either side ofjth'e ratchet wheel69 is a ratchet lever 70having-a pawl 71 arrangeol' p to engage the teeth of the ratcl'iet wheel. To

the ratchetlever70 is connected an eccentric *rod" 72 which engages an accentric 73 at taclied to the power shaft 12. When'now the power shaft 12' is rotated theeccentric causes chine inthe mines; the vertical width of the the oscillation; of the ratchet lever to rotate; the shaft 67 'which through the'worm and wormwheelrotatesthe vertical shaft 62 to rotate the Windingdrum 56to wind thefrope. flheguide sheaves 60are disposed: about the i Q periphery ofthebase platea in such manner 5 j that the feed rope '57 may be carried; around theturn table either direction to be" attached to the anchor :61. Bythisfarrangej "ment the operator may cause the rotation of the turn table either in the direction to engage the coal to cut it, or in theyopposite direction to position the cutter arm preparatory to beginning a new cut.

InQorder to facilitate handling the ma cutter frame 1 5is made less than the total height of the coal vein which istoqbe mined, and, after the .lower portion of the coal has been re1noved,the cutter frame is rotatedupon the trunnions 8 and. 9 to. its upper posi-' tionand as'econdcut is made to remove the upper portion of the coal. This vertical inovementof the cutter frame is provided ;for'in avertical arm 73 attached to the base plate at" and eaten ding. parallel to and adj a- J nath ;wawadses efptlie pl e as of sfii' th cutter frame." Mounted uponthis yer,

tical arm 73: are lguide sheaves74= and 75-over which the feed rope '57 maybeled to be attachedtothe projection176 of, the platef24.

In Figures 9 to20 inclusive, I have shown :1.

modification of the above described machine whereinthesole'lplate 1 is made circular in form concentric with the ring? The outer edge of the plate 1 is turned upward as shown .at 1. to facilitate sliding the machine over. the floor of the mine, and is then turnedouts ward to form. ahorizontal flange 1 provided I is-mounted upon a: vertical shaft '62 journaled in a bearing 63 rope 57' may beengaged Concentric with the ring 2 is an upstanding pivot stud 3 whicli engages a. pivot bearing 5 formed at the center of the main frame castingt. The main frame 4: bears upon the ring 2 to form a turn table upon which aremounted the operative parts of the machine. 'frame is an electricmotor 6 by which power supplied to actuate t-liemachine. Attached Mounted upon the main to the side of the motor is startingb'ox 82 by which the motor is controlled. The starting box is provided with acontrolling handle 83 connected withthe internalmechanism of the starting box 'by which the motor may be started or stopped, and with asecond'operatins, handle 84 connected with a reverse switch withinthestarting boxcasing'by which the direction of rotation of thearmature ofthemotor is controlled; Asuitable conductor cable 85 is provided to connect the motor with a convenient sourceof electric supply.

nalbearings'f in which are niountedthe trunnions '8' and 9 of the'cradle casting. 10 upon which the cutting mechanism, and gathering mechanism of the machine are mounted,

Journaledin a bearing formed in the trunnion 9 and in a secondbearing 11 attached to the main frame casting 4' is a'power shaft 12 from which 18 actuatedthe several elements of the machine; This power shaft 12- is con nected with theniotor 6 throughthespur gear 13 and armature pinion l4. Rotataloly mounted upon the shaft 12 is a sprocket wheel l7 uponthe hub of which is formed clutch teeth 18 adapted'toengage with similar teeth on the clutchinemberl9 splinedto the shaft 12. p

i051 Formed ontlie frame of the motor 6 are jour- 17 engages a cutter chain 16 adapted to travel in a groove formed in the side of a loop shaped cutter frame 15. The chain 16 is of a type well known in the mining'machine art consisting of alternate strap'and block links, the latter having laterally projecting sockets 20 in which are fixed the cutter bits 21.

The cutter frame is formed of a steel bar 22 of rectangular cross section to the sides'of which are attached plates 23 the projecting edges of which form. guideways in which the cutter chain 16 travels. This rectangular bar is bent to form four sides of a pentagon, and is secured at both ends to a vertical plate 24 which forms the fifth side of the pentagon. The plate 24 is attached to a slide casting 92 adapted to movement longitudinally of the cutter frame in the guideways 93 of a vertically extending flange 25 of the cradle casting 10. Theposition of the slide casting 92 longitudinally of the guidewa-ys .93 is controlled by an adjusting screw 94 to regulate the tension of the cutter chain 16 in the manner common to chain cutting mechanisms. The cut-- tor-frame thus formed is adapted to rotary movement about the trunnions 8 and 9 and is so formed that when in its lower position the lower side 26 of the pentagon will be parallel with the general direction of the coal seam at the line of the floor and when in its elevated position the upper side 27 of the pantagon will be parallel with the-general direction of the coal seam at the line of the roof of the mine.

plates 32 by suitable angles 33.

The gathering mechanism comprises a conveyer 28 of Well known type mounted in the cradle casting 10, its forward part extending parallel with and in the same horizontal plane as the lower side 26 of the cutter frame to which it is attached by the broad apron 29 adapted to extend into the kerf beneath the coal to receive the fragments as they break off from the mass of the vein. These fragments of coal are moved across the apron 29 by the movement of the apron relative to the fixed body of the coal, and pass onto the conveyer to be carried rearwardly of the ma chine.

The conveyer comprises a trough formed of the

plates

30 and 31 attachedto the side 7 The angles 33 form guideways for the conveyer chains 34 and protect them from material traveling in the conveyer trough. The chains 34 are connected at convenient intervals by cross bars 35 which serve as scrapers to move material along the trough. At the outer end of the conveyer these chains pass around the head sprockets 95 an d at the inner end of the conveyer around the guide bar 96 over the edge of which the chains readily slide. This guide bar 96 extends across the conveyer structure and is movable longitudinally thereof by the adjusting screws 97 for the purpose of regulating the tension of the chains 34. At the line of the trunnions the conveyer trough is head shaft j ournaled in bearings 39 of the bracket 37 and driven through the

sprocket wheel

42 and 44 and the chain 43 from the power shaft 12. The sprocket wheel 42 is connectible to the head shaft 40 byasuitable clutch 45 which may be of any convenient type, but I prefer to use a clutch of the well known multiple disc friction type having a hand wheel 46 by which the pressure upon the discs of the clutch may be regulated to drive the conveyer, and which, by the slip page of the disc, will prevent the breakage of the, parts should the conveyer become 7 ammed.

Material is delivered by the gathering conveyer 36 into a circular hopper pivotally supported upon an extension of the base plate casting 47 and is carried from this hopper to the car 49, conveniently placed upon the mine track in the rear of the machine by a conveyer 48 The conveyer 48 may be of any convenienttype, but I prefer to use a conveyer of the same general type as the gathering conveyer. having a trough composed of bottom plates 98and 99 joined to side plates 100 by suitable angles 101. In the guidewavs formed by the. angles 101 travel the endless chains 102 which are joined together sit-spaced intervals by the scraper cross bars 103. This eonveyer is self-contained being provided with an electric motor connected through suitable gearing with the sprocket wheels 104 in engagement with the under strands of the conveyer chains to drive them. Intermediate the ends of the conveyor 48 the trough is divided, the parts being connected together by a hinge 105. and means is provided in the arms 1.06. rope 107 and winding mechanism 108 to control the elevation of the delivery end of the conveyer to accommodate cars of varying heights. In Figure 16. I have illustrated the preferred construction of the pivotal mounting to the hopper 50. Mounted upon the extension 47 of the base frame are a plurality of rollers 54 upon which bears the base plate 109 ofthe hopper construction. At the center of the extension 47 is an aperture through which extends a pivot bolt 52 having a broad head 53. to engage the upper surface of the base plate 109. and vat itslower end a nut 110 which bears upon the under side of the extension casting to resist upward movement of the pivot pin. Between the nut 110 and the extension casting 47 I preferably insert a ball bearing 111 to reduce the friction between the parts. By this construction the rollers 54 act as fulcrums to support the overhanging weight of such manner that the rope 57 may be lead off inany desired direction.

- .As shown in Figure '56 is. mounted upon a vertical shaft 62 to which it'maybe connected by amultiple disc fclutch contained within the body of the drum and controlled by the handpwheel 64: in a manner. common to such clutches. Attached. to thehand heeI .6 1 is a sprocketwheel 114:

'3 of attachment the loading conveyer and allow itto be free ly rotated about the pivot pin52 so that the hopper 5O?- may atall timesreceive material from. the gathering conveyer and the discharge end of the loading conveyer may main-.

tain "its relation with. the car to be loaded. The feeding mechanism'consists of awindg q ing drum56 upon which is windable the feed rope. '57'having asuitable terminal hook81 adapted to engage the apertures of the base plate 1. Sheaves 58?, 59, and 60 are provided to guide therope to thede'sired point The sheave 59 ,is mounted. in a castersu'pport 112 havingtrunnions 113i jonrnaled .inbearings. of the main frame in around'whichpasses-an endless chain 115 extending beneath the conveyer 36 to the sprocket wheel. 116 mounted} upon. a vertical shaft 117'. The'shaft 117 is journaled infa.

bearing 118 formed on the cap of the journal bearing 7.. 'Upon the upper end of the shaft 117is mounted a'hand wheel 119. Bythis arrangement the friction clutch Within the drnin 56 may be controlled from either side of the machine; I

' The shaft 62 is journaled. in a bearing63' 0f the baseframe casting l andis attached at its lower end to a worm gear wheel 65. Tlielworm gear 65is'engaged by a worm 66 attached to a transverse shaft 67. journaled in suitable bearings. 68 of the base frame cast ing, 1. Attached to the shaft 67is a ratchet wheel 69 adapted to be engaged by the pawl 7-1 carried iby the ratchet levery70 The ratchet: lever -70uis connected with an eccenftric rod- 72 which engages the eccentric mountedupon: the power shaftlf By the ro-- tation of. the eccentric 73 the ratchet lever 70'is caused to. oscillate thereby driving the ratchet wheel .69; to rotate thelworm 66 and drive the winding drum 56. curved metal:

lic shield adapted to engage the pawl 71 is supported in position concentric with the ratchetwheel 69" by the pivoted arms 121 mounted upon the shaft 67 atleither gside of the ratchetiwheel. On the arms 121 is'formed i an extension ar1n122 connected byalinlt 123 witha-bell crank124 attached to, a shaft 125 having a controlling handle .126within con.v

.venient reach oftheoperator. By the rota.-

tion of the shaft 125 the: shield 120 is moved I relative toytheratchetwhcel to engage the a awl71yduring a greater. or less part of its oscillation thereby controlling the rateof rotation of the ratehetwheel and the consequent rate. of winding the feed rope 57. The ver- 13 the winding drum;

attached to the anchor 61.

tical movement of the-cutter frame maybe effectedin any' preferred manner.. n Fig; ures 9,10,012 and 17 of the drawings I have illustrated hydraulic devices adapted. to this purpose comprising an upright cylinder 127 attachedrtorthe vertically extending-flange 25 of the cradle casting 10. Within the cylin- I der 127 is a piston 128-having a socket whereinbears the upper end of the pistonrod 129 pivotally connected to'the base frame 4 by the brackets 130 and hinge pin 131. The cylinder 127 is connected through a suitable pipe 132 with a pressure pump 133 having a plunger 1341 connected to the e'ccentric rod 135 of the eccentric 73*" mounted. uponthe power shaft 1 12.. A suction pipe 136 extends from the pump 133 to the slack Water tank137. A

controllever 138 isprovided uponthe pump, I it by which the pump valves are controlled to cause water to flowfromthe slack tank into the cylinder 127 to lift the cutter arm, from the cylinder 127 3 into the slack tank 137 to depress the cutter arm, or to preventthe escape ofwater fromthe cylinder 127 thereby lockingthe cutter arnfi inany desired position. r v

i To operate by the room and pillar system the mach ne isplaced, as shown in Figure 5', on the central line ofthemine room adj accnt the coal face,'the cutter frame 15 turned to the right, and the car 19 positioned beneath the. discharge and of the loading conveyor 1 4:8. The feed'rope 57*is drawn out from the windingdrum 56, passed iaround the guide sheaves 60 in the anti.-clockwiseldirection and y The cutter chain is then started and the feed rope wound up to rotate the main frame 4; to cause movement of the cutter frame 15 fromriglit to left. As the cutterframe advancesa kerf is formed in the mine wallextending above, behind and beneath a section of the coal, entirely severing it from the mass ofjthe vein. Owing'to the natural cleavages ofthe coal, this section breaks up in to smaller fragn'icnts of a size convenient to be handled and these fragments are received by the gathering conveyor 28, carried rearwardly of the machlne and de I InF1gure 6 1s illusposited in thecar 19. trated therelation of theparts when the cutter frame 15 is at the middle of the cutfand in Figure 7 is shown the relation of the parts when the cutter frame has reached the left;

hand side of the room and completed the cut.

Aiftcr completingacut across the lower part ofthe'coal face, the'feedrope 57 is dis connected from the anchor 61, passed around the guide sheaves 60 in the opposite direction andv again attached to the anchor 61. By then] winding the rope 57 the turn table is rotated from left totrightto restore the cut terarm to the position of beginning. The

feed rope is then disconnccted from the anchor 61. passed aroundthe sheaves 7 1 and 7 5ofthe vertical arm 73 and attached to the feed rope will again be connected to the an chor 61 to move the cutter arm in a direction to cut the coal. 1 Vhen the 'machme 1s cquippedjwith the hydraulic elevating de-" vices illustrated in Figures 9, 10, 12 and 17, the elevation of the cutter frame is effected by the manipulation of the control lever 138 to directthe flow of Water into or from the cylinder 127. After the completion of the upper cut the cutter frame 15 will be restored to its lower position at the right hand side of the machine. The feed rope 57 is drawn out from the drum 56 and attached to a suitable abutment 79 adjacent the coal face, as illustrated in Figure 8. By Winding the rope 57 the machine will be drawn forward over the floor of the mine to the position shown in Figure 5 and the operation as above described repeated.

To operate under the long Wall system the machineis placed adjacent the right hand end of the Working face With the cutter frame extending to the right as When placed preparatory to beginning the operation in the room and pillar system. then rotated towards the left until it stands at right angles to the Working face, in a position similar to that shown in Figure 6. A pin 139 is then inserted in one of the apertures 61 to engage the bracket 130 and prevent further rotation of the main frame 4 relative to the sole plate 1. A snatch-bloek 140 having a hook 141 for insertion in the aperture 61 is then attached at a suitable point on the sole plate 1, the feed rope 57 drawn out from the drum 56 passed around the sheave 142 of the snatch-block and its end secured to'an anchor ack 143 positioned in advance of the machine adjacent the coal face. By the proper positioning of the snatchblock 140 and the anchor acl: 143 relative to the other parts of the machine, there be produced such a balance of strains when the feed rope 57 is Wound up that the maclnne Will be moved bodily along the coal face, as illustrated in Figure 21.

When the coal to be mined is comparatively hard and offers considerable resistance to the advance of the cutting devices, the frlct on of the sole plate 1 upon the floor of the mine may be insufficient to resist tl'lETQtlClllQIl of a feeding mechanism. Under such c1rcum- -stances resort is had to the customary jacln posts 144 which may be placed to engage the sole plate at any convenient points and extend to the roof or Wall of the mine to prevent movement of the plate 1 upon the floor of the mine. The apertures 61 afford con- The cutter frame 15 is venient means of engagement of the pointed end of such a jack. The position of these jack posts 144 Will depend upon local con ditions which. are Well understood by those skilled in the manipulation of mining machines. i

What I claim is 1. In a mining machine of the class de-' scribed, the combination of a main frame, rotatable around a vertical axis, a vertically disposed loop-shaped guide frame projecting from the main frame, a cutter chain arranged to travel around said guide frame to sever a block of material, an outWardeXtended endlesstonveyer continuously rotating-in vertical planes and mounted in fixed position relatively to said loop guide frame, and having its inner end arranged behind the active part of the loop cutters, and means to rotate the main frame and cause engagement of the cutters with the coal. 7

2. In a mining machine of the class described, the combination of the horizontally rotary main frame, the loop-shaped guide frame projecting from the main frame, the cutter chain arranged to travel around said loop guide, the outward extending endless conveyer continuously traveling in vertical planes, and having its receiving end behind the active part of the loop cutter, a second endless conveyer, having its receiving end arranged to receive material from the discharge and of the first conveyer, and a frame carrying said second conveyer and mounted pivotally on the main frame.

3. In a mining machine of the class described, the combination of the horizontally rotating main frame, the loop-shaped guide frame carried by the main frame, the cutter chain traveling on the loop guide frame,'the primary endless conveyer traveling continuously in vertical planes, and fixed in relation to the loop guide frame, and the second end less conveyer mounted on the main frame, said tWo conveyers being movable'to different angular relations With each other While in operation and While the cutting mechanism is horizontally rotating.

4. In a mining machine of the class described, the' combination of the horizontally rotary main frame, the loop-shaped guide frame extending from the main frame, the cut ter chain traveling around the guide frame, the endless conveyer on the main frame traveling continuously in vertical planes, and having its receiving end arranged immediately behind the operative parts of the loop cutter, and fixed relatively to the main frame, the second endless conveyer pivotally mounted on the main frame, and power de- -vices for rotating the" cutters horizontally in one direction,-the adjacent ends of the conveyers being both simultaneously movable in a direction opposite to that aforesaid.

5. In a mining machme of the class derotatable main frame, a vertically disposed loop -shaped gu de frame, pro eot1ng from the main frame, a cutter chainarranged to travel on the guide frame andsur'round a block of material as it is being severed, an endless conous ly in vertical planes, and having its receiving end behind the cham gulde frame, means torotate the'main frame and means to vertically adjust the loop} guide frame relatively to the main frame rotatable about a vertical axis a vertically on the guide frame-around a block of matating continuously in vertical planes, and havin its receiving end below and behlnd the 7;. In a mining machine, the combinationof the pan-like Wide 'smooth surfaced base, adaqqted to rest upon and slide over a mine floor, a main frame on the I, base rotatable around a vertical axis, a vertically disposed loop-shaped guide frame proyecting from the main frame, a cutter chain. arrangedto travel on the guide frame in a loop -like p ath, an endless conveyer attached to and movable with behind and below the guide frame, power clevices on the main frame, andcmeans to rotate sa d frame on the base, or, at option, toino ve the base and the parts supported thereon bodily along the Walls of'the mine.

I 8. Ina mining machine, the combination of the panelilte wide smooth. surfaced, base,

adapted. to, upontand slide over a mine floor, a main, fran e-onthebase rotatable 6 main franie, a cutter chain arrangedto travel rotation of the mainframe relativefltoxthe base, or, at option, to "anabutment i on the guidegf' f f in a looplilte path, an endless convey attached I to and movable ivith'theguide frame and traveling continu ouslyin vertical planes, and having its re- 'ceiving', end'behindand' below the guide;

fra e, a-winding drum on the mainframe, a rope wlndableupon the'drum and adapted either to be connected to the base to produce scribed, the combination of a horizontally veyer on the main framefltraveling continu v 6. In a miningmachin'e of theclass de scribed, thelcomblnation of themain frame,

disposed loop shaped guide frame projecting i from the mam frame, a cutter chain traveling teriala s it is being severed,"a:conveyer frame. I attached to and movablew ththe loop gulde frame, an endless conveyer on said frame roe;

loop cutter and arranged'totravel on lines in the guide frame and traveling continuously in; vertical planes, and having ts IGCBIVHIg end 'to'beniined.

12,111 a mining machine, thecombination around a vertical axis, a 1ver'tically' disposedf w PPO g & 11minv f upon loop-sh apedguide frame projectingfromthe of themachine to bodily move thefn'iachin'e. relatively to the wall of the umen, H I I 9. Ina lnlllll'lg machlne, thescomblnat on main frame, a cutter chain arranged to travel on the-guide frame pro ect1ng from the main frame, in a loop-like path, a manually controllable power actuated winding drum upon the main fran'ie a rope windable upon the drui'n and adapted to either connected tothe supporting base to rotate the main frame thereon or, at option, connected toan abutment inadvance of the machine to bodily move the machine relative to the Wall of the 'mine. a p I 10. In a mining machine of the class described, a vertically disposed pentagonal cutter frame adapted to vertical adj ustment about a pivotal support, the proportions of the frame being such that when in its lower a position of adjustment the lower side'of the pentagon will extend in a plane substantially parallel with the general direction of thevcin at the floor of the mine, and when in its upper position of adjustment the upper side of the-pentagon will .extendxin a plane substantially parallel with the general direction of the vein at the roof of the mine, cutting devices carried by the cutter frame adapted tosever a section, of matenal from the'wall of the mine,fiand means to move the support to cause the cutting devices to engage the material to be mined. 11. In a mining machine, the combination of a supporting base, a main frame mounted about a vertical ax ,pivo'tally mounted cutting mechan sm prqectmg laterally from said ma n frameand adapted to cut a section tire machine bodily relative to the nn'iterial the base adapted to rotation "about a vertical axis, a transverse powershaft mounted upon the main frame, iaqvertically disposed laterally projecting loop shaped cutting mechanism mounted for pivotal adjustment about i on, said base adapted for rotation thereon a I, of material from the wall of the m ne, means -to adpist SitICl cuttingmechanism angularly aboutit.

said power shaft and adapted; to severa s'ection of 1i1atei'ialfiom the mine wall, continuouslyactmg conveyer attached to said cutting mechanlsm' and] movable therew th in position to receive the severed material and transport itrear ward'ly of the niachlne', feeding dev ces adapted'to move the! main frame relative to: the base to cause'the cutting mechanism to.' engage the mater al to be mined ,or to movethefmachine bodily relative to the wall of the mine, means to rotate the power shaft, and means to actuate the cutting mechanism, the conveyor mechanism and the feeding devices from the power shaft.

18. In a mmmg machine, the combination with a supporting base, a main frame upon the base adapted to rotation about a vertical axis, a transverse power shaft mounted upon rearwardly of the machine, feeding devices;

adapted to move the main frame relative to the base to cause the cutting mechanism to engage the material to be mined or to move the machine bodily relative to the wall at the mine, means to rotate the power shaft,-

and means to actuate the cutting mechanism, the adjusting means, the conveyor and the feeding mechanism from said power shaft.

14. In a mining machine, the combination with a main frame a transverse power shaft mounted upon the main frame, a vertically disposed laterally projecting loop shaped cut ting mechanism mounted for pivotal adj ustment about said power shaft and adapted to sever a section of material from the mine wall, a continuously acting conveyer attached to and movable with said cutting mechanism in position to receive the severed material and transport it rearwardly of the machine, means to vertically adjust the cutting mechanism, feeding devices adapted to move the main frame to cause the cutting mechanism to engage the material to be mined, means to rotate the power shaft, and means to actuate the cutting mechanism, the adjusting means, the conveyer and the feeding devices from said power shaft.

15. In a mining machine, the combination with a main frame, a vertically disposed loop shaped guide frame projecting laterally from the main frame, means to vertically change the position of the guide frame relative to the main frame, a cutter chain arranged to travel on the guide frame and adapted to.

severa section of material from the mine wall, a continuously acting conveyer attached to and movable with the guide'frame in position to receive the severed material, and means to move the main frame to cause the cutting mechanism to engage the material to bemined. p

16. In a mining machine,the combination with a supporting base, a main frame upon the base adapted to rotation about a vertical axis, cutting mechanism projecting laterally from the main frame adaptedto sever a sec- 'tion of material from the mine wall, means to lock the main frame against movement relative to the base, and meansupon the main frame adapted to be connected at option either to the supporting to produce rotation of the main frame relative to said base or to an abutment in advance of the machine to move the machine bodily relative to the an outwardly extended continuously traveling endless conveyer mounted in fixed relation tothe' loop shaped guid frame and having its'inner end arranged behind the active part of said loop cutters, and means to rotate the main frame 1.0 cause the engagen'ient of the cutters with the material to be mined.

18. In a mining machine, the combination of a main frame adapted to rotation about a vertical axis, a vertically disposed loop shaped guide frame projecting laterally from said main frame, a cutter chain arranged to travel around said. guide fran'ie to sever a bloclrof material from the wall of the mine,

an outwardly extended continuously traveling endless conveyer mounted in lixed relation to said loop shaped guide frame and having its inner end behind the active part of said loop cutter, and a second endless conveyer mounted upon said main frame in position to receive material from said-primary conveyer the said two conveyors being movable to different angular relations with each other wiile in operation and while the cutting mechanism is horizontally rotating.

19. In a mining machine, the combination of a pan-like wide smooth surfaced base adapted to rest upon and slide over the floor of a mine, a main frame upon the base adapted to rotation about a vertical axis, cut ting mechanism projecting laterally from the main frame adapted to form a her-f above, behind and below a section of the mine wall to sever a block of material therefrom, and means upon the main frame to at option either rotate the main frame relative to the base or to move the machine bodily relative to the material to be mined.

20. In a mining and loading machine, the combination with a main frame, of a supplemental frame mounted to swing on an upright axle on said main frame, of core cutting mechanism having an unobstructed core opening and mounted on said supplemental frame, and loading apparatus comprising conveyer mechanism extending from a position back of the core cutting mechanism and along said main frame back of said upright axis to leading position, a portion of said conveyer mechanism being adapted to rest fiat on the floor of the mine chamber for nism along lines in horizontal planes to cut a core, and means for holding said core cutting mechanism in adjusted position relative to said main frame to effect the cutting of a core with its lower surface in an approximately horizontal plane when the core cutting mechanism is in one position and the cutting of a core with the upper surface thereof in an approximately horizontal plane when said core cutting mechanism is adjusted to another position.

28. In a mining machine, the combination with a supporting frame, of core cutting mechanism having an unobstructed core opening therethrough and mounted on said sup porting frame to swing relatively thereto, means for driving said core cutting mecha nism, means for swinging said core cutting mechanism relatively to said supporting frame on an upright axis to effect the feed of said core cutting mechanism, said core cutting mechanism having spaced apart runs extending in converging planes relative to said supporting frame, means for supporting said core cutting mechanism on said supporting frame to swing on an axis extending transversely of the axis of feeding swinging movement, and means for holding the core cutting mechanism in adjusted position. v

29., In a mining machine, the combination with a supporting frame, of a cutter frame having an unobstructed core opening there through between spaced apart runs extending in converging planes relative to said supporting frame, an endless chain cutter mounted 011 said'cutter frame, means comprising a sprocket wheel for driving said chain, means for tilting said cutter frame relatively to said supporting frame on the axis of said sprocket wheel to adjust the positions of said spaced apart runs relatively to said supporting frame, and means for feeding said cutter frameduring the driving of said chain cut-. ter to effect the cutting of a core in the adjusted position of said cutter frame including said spaced apart runs. 30. In a mining machine, the combination with a supporting frame, of a supplemental frame pivotally mounted on said main frame for arcuate movement relatively to said sup porting frame on an upright axis, a cutter frame pivotally connected on a horizontal axis for upright swinging movement relatively to said main frame, said cutter frame being elongated and having an unobstructed core opening therethrough between spaced apart runs in converging planes, the lower run extending approximately along the floor of a mine chamber and the upper run extending downwardly toward the floor away from said frame when said frame is in its lower position, and a chain cutter mounted on'said cutter frame to travel around said unobstructed core opening, means comprising a sprocket Wheel mounted on the horizontal axis of p nism to cut cores along leave the surfaces of said floor and roof in swinging movement of said cutter frame for driving said chain cutter, means for swinging the supplemental frame on its upright axis relatively to said main frame to effect lateral swinging movement of .ai d cutter chain to out an arcuate core extending through said unobstructed core opening, and means for swinging said cutter frame upwardly into position where the upper run will be approximately in a horizontal plane along the roof of the mine chamber.

31. In a mining and loading machinmtho combination with a supporting frame, of a supplemental frame mounted on said supporting frame for arcuate movement relatively thereto on an upright axis, loop chain core cutting mechanism comprising a chain cutter and a driving sprocket, conveyer mechanism comprising a driving sprocket and mounted on said supplemental frame to move arcuately with said core cutting mechanism in position to receive dislodged material from the latter, a motor mounted on said supplemental frame, driving connections between said motor and said chain cutter sprocket, and means for extending the driving connections to the con veyer sprocket to effect the operation of said chain cutter and the operation of said conveyer mechanism in unison.

32. In a inining'machine, the combination with a main frame, of supplemental frame pivoted thereto, of a core cutter having upper and lower runs relatively inclined in intersecting planes and pivotallyconnected to said supplemental frame on an axis transverse to that of the supplemental frame and spacer therefrom, and means for operating said core cutter including the feed thereof to cutcores leaving the floor and roof with surfaces in substantially horizontal planes.

'33. In a mining machine, the combination with a main frame, of a supplemental frame mounted" on said frame for rotary movement on an upright axis, core cutting mechanism pivoted to said supplemental frame for rotary movement on an axis transverse to that of said upright axis and spaced therefrom, said core cutting mechanism having'upper and lowerruns in intersecting planes, and means for operating said core cutting mechanism in cluding rotary movement of said upright axis to effect the feed of said core cutting mechathe floor and roof and spaced apart horizontal planes. 7

34. In a mining machine, the combination of a supporting frame, a cutter frame carried thereby, cutting means on said frame to form a lower kerf, cutting'means on said frame to simultaneously form an upper kerf disposed on a plane inclinedupwardly from its inner end to the face of the coal, means for driving said cutter means, and means for moving said frame and cutting means through the coal.

35. In a mining machine,'the combination of a supporting frameya movable cutter frame carried thereby, cutting means on said 1 frame toform a lower kerf, cutting means on said frame to snnultz'tneously form an upper kerf disposed on a plane inclined upwardly from its inner end to the face of the coal,

means for driving said cutting means, and means for swinging said f'I'itl'HBtllltl. cutting means through the coal to makean arc sh aped "tially horizontal lower fra'me member, and an upper frame member inclined upwardly from its innerend to the face ofthe' coal, acutt'er chain carried by said frame, means for driv ing said cha1n, and. means for moving said frame and chain through the coal.

37. In a nnning'machme, the combination of a supporting frame, a cutterframe in the form of a continuous loop carried therebyand having a lower frame member adapted to lie in a horizontal plane, and an upper frame member adapted to lie in a plane inclined upwardly from its inner end to the face of the coal,,a continuous cutter chain carried by sa d frame, means for driving said chain, and means for movlng sald' frame and chain;

through the coal. I j

38. In a mining machine, illlQCOl'llbiIlP-IDIOH .of a supporting frame, a movable cutter frame in the form of a continuousloop carried there by and havlng a lower framememloer adapted to lie in a horizontal plane, and an upper frame member adapted to he 1n a plane 1nclined upwardly fromits inner end to the face of the coal, a continuous cutterchai'n carried by saidframe, means for driving said chain, and means for swinging said frame and chain through the coal to make an arc-shaped cut.

39.- In a mining machine, the combination of a supporting frame, a cutter frame mount ed thereon for verticalmovement, cutting" means on'said frame adapted to forma substantially horizontal lower kerf 1n one posir tion ofjthe cutter frame,.cutt1ng means on said frame to simultaneously form an upper kerf d1$POSGdO11 a plane lncllned, upwardly from its inner end'to the face of thecoal, means for movingsaid cutter frame to a position where the planes of the; kerfs are reversed, and

, jmeansfor movingthe cutter frame and-cutting means througlrthe coal.

l 40. In a mining machine, the combination of a supporting frame, a cutter frame mounted thereon for vertical and horizontal moveme'nt, cutting means on said" frame adapted to 7 form a substantiallyhorizontal lowertlrerf in one position of the cutter frame, cutting means on said frame to simultaneously form an upper kerf disposed on a plane inclined upwardlyfrom its innerend to the face of the coal, means formoving said cutter frame to a positionwhere the planes of the kerf are reversed, and means for swinging said cutter frame and cutting means through thecoalto make an arc-shaped cut.

il. In a coal mining machine, a horizontally extending kerf cutter comprising a body i portion and a cutter bar projecting therefrom adapted for forming a kerf cut under a pile of loose coal with said cutter bar, an endless conveyor secured to thebody portion of said kerf cutter and having a portion projecting int spaced parallelism with said cutter bar whereby when said cutter bar 1S forming said kerf the projecting portionof said conveyer will be movedthrough said kerf and will carryaway the coalfalling thereupon, and SO means carried by said cutter bar and overhanging the adjacent portion of saidconvey-v er for preventing coal from falling into the space between the same when moved laterally under the pile of loosecoal.

, 42. In a coal mining machine, a horizontally extending'kerf cutter comprising a body portion and a cutter bar projecting therefrom adapted for forming a kerfcut under a pile of loose coal with said cutter bar, an endless conveyor secured to the body portion of said 'lce'rf cutter and havlng aportion projecting 43'. In a coal mming machine, a horizontal extending kerf cutter comprisinga body portion and a cutterbar projecting therefrom adapted for forming a kerf out under a pile of loose coal with said cutter bar, anendless conveyor securedto the body portion of said kerf cutterand having a portion projecting in spaced parallelism with a said cutter bar whereby when the latter is forming-said kerf the projecting portion of said conveyor will be moved through said kerf and will carry away the coal-falling thereupon, and an llll'? perforatetransfer board extending longitudinally or said cutter bar and removably secured to the top face thereof for bridging the space between the-cutter bar and the'adjacent portion of said'conveyer. l h

4a. In a coal mining machine, a horizontally extendinglterf cutter comprising a body portion and a cutter bar projectingtherefrom adaptedfor forming alrerf out under a pile of loose coal, an endless conveyer, adetachable pan for connecting the intermediate portion of said conveyer to the body portion of said kerf cutter, and means for detachably connecting the front end port-ionofsaid conveyer to the cutter bar whereby when the latter isforming said kerf the'front end por--. tion of the conveyer will be moved through said kerf and will carry away the coal falling thereupon.

45. In a coal mining machine, a cutter bar, a conveyer fastened thereto and arranged in spaced parallelism therewith, means for moving said members longitudinally and late ally over the floor of a mine, and a transfer board mounted upon the cutter bar and extending laterally to terminate above the conveyer.

46. In a machine of the class described, a cutter frame and a conveyor frame extending horizontally side by side and in spaced rela tion to each other, a cutter chain on said cutter frame With its active section running along the edge of said cutter frame remote from said conveyor frame, a draft device on said conveyor frame, an apron between said frames and terminating above said conveyor frame, and means to' laterally advance said frames together With said conveyor frame in trailing relation to said cutter frame to engage said chain in a mass of material to form a passage therein, said apron acting to transfer mate rial coming thereupon into the path of said draft device.

47. In a machine of the class described, a cutter frame and a conveyor frame extending horizontally side by side and in spaced relation to each other, a cutter chain on said cutter frame with its active section running along the edge of said cutter frame remote from said conveyor frame, a draft device on said conveyor frame, an apron secured to the upper edge of said conveyor frame adjacent said cutter frame and extending toward the latter, and means to laterally advance said frames to ether With the conve eor frame D in trailing relation to the cutter frame to engage said chain in a mass of material to form a passage therein, said apron acting to transfer material coming thereupon into the path of said draft device.

48. A machine according to claim 46 Wherein the said frames are connected to a common supporting frame.

49. A machine according to claim 46 Where in the said frames areconnected to a common supporting frame, and motive means on said supporting frame to feed all the frames adj acent the mass of material to be operated on.

In testimony whereof I have hereunto set my hand.

NILS D. LEVIN.