US1247422A

US1247422A - Mining-machine.

Info

Publication number: US1247422A
Application number: US72679512A
Authority: US
Inventors: Nils David Levin
Original assignee: Jeffrey Manufacturing Co
Current assignee: Jeffrey Manufacturing Co
Priority date: 1912-10-19
Filing date: 1912-10-19
Publication date: 1917-11-20
Anticipated expiration: 1934-11-20

Description

Patented Nov. 20, 191'?.

4 SHEETS-SHEET l.

N. D. LEVIN.

MINING MACHINE.

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Patented Nov. 20, 19V?,

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N. D. LEVIN.

MINING MACHINE.

APPLlcAioN FILED oc.19.1912.

Patented Nov. 20, 1917;.

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N. D. LEVIN.

MINING MACHINE.

APPucATioN FILED ocT. 19. |912.

Patented Nov.. 20, 1917.

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MILS DAVID LJVIN, OIF COLUMBUS, OHIO, ASSIGNOR TO THE JEFFREY MANUFAC- TUBING COMPANY,

OF COLUMBUS, OHIO, A CORPORATION OlE OHIO.

camine-MACHINE.

Specitication of Letters Patent.

Patented Nov. 20, 191V?.

.application led October 19, 1912. Serial No. 726,795.

To all whom t may concern.'

Be it known that I, NILs I).V LEVIN, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Mining-Machines, of which the following is a specification, reference being had therein to the accompanying drawings. p

This invention relates especially to continuously 'cutting mining machines of the type especially adapted for use in mines which are worked according to the room and pillar. system, and to trucks for use in combination with such machines for transporting them. its to certain features, however, my invention is not so limited, and may be applied to machines of other types.

The principal object of the invention is to provide an improved arrangement of gearing and power transmitting mechanism for driving the cutters, for driving and controlling the ropes or cables by means of which the cutter mechanism or the machine guided, and for driving the truck upon which the machine may be placed for transportation. Another object is to provide improved means whereby the machine can be reversed for operation in either direction. Another object is to provide improved means whereby power can be applied to the rope which is normally used for retardin the outlet end of the machine. Another o ject is to provide `means whereby the feed cable may be attached at any one of several elevations tc change the line of pull. Still other objects will be apparent from the following specification and claims.

In the accompanying drawings I have shown one embodiment of my invention, but it .will beunderstood that many modifications and changes may be made without de parting from the spirit of the invention as set forth in the claims which are hereto appended.

" In the drawings,

Figure 1 is a plan view of a miningl machine embodying my invention.

btt

Fig. 2 is a side elevation. Fig. 3 is a longitudinal section of A apart `of'the machine-taken along thelmve l of Fig. 1. p p ig. 4 is a section taken along the line [1 -tof Fig. l.

Fig. 5 is a detail view of the anchor or jack for the feed rope.

Fig. 6 is a vplan view of a truck adapted to support the mining machine and to be driven by it.

Fig. 7 `is a side elevation showing the mining machine on the truck.

Fig. 8 is a diagrammatic view showing `the machine making a transverse cut across the face of a room. y

Fig. 9 `is a diagrammatic view showing the machine making a transverse cut across the face of a room in the direction opposite to that indicated in Fig.` 8.

Fig. 10 is a diagrammatic view showing the machine making a sumping cut. Fig. 11 is a diagrammatic view showing the machine being moved across means of the rear controlling rope.

Fig.,12 is a diagrammatic view showing a modified arrangement of the feed rope. This viewzgisbtherwise similar to Fig. 8.

Referrn'gto the drawings, A represents as a whole the bed frame of the minin machine. This bed frame, in the embodiment shown, comprises several parts.` One of these parts is the main frame casting. l, which is secured to and mounted upon a horizontal platform or shoe 2 which is adapted to rest and slide upon the floor of a mine. Thief/shoe constitutes another part of the bed ffiame, and the motor frame which will be hereinafter referred to constitutes a third part.

Projecting from the main frame 1 is the cutter arn173 which may be' of any of a variety of constructions. As shown vin the drawings `this cutter arm has a top plate i which is formed integrally with the casting 1 and is provided with a central slot 5. Beneath thetop plate 4, and similar to it in lsize and -shape, is a bottom plate 6. Between the top and bottom plates there is a spacer block 7 of smaller outline than the plates. The top and bottom plates andthe spacer block are held together by suitable bolts or rivets as shown. .It will be noted that the top and bottom plates project inward/beyond the edges of the spacer block at'the center thus forming a slot having in itsg'edges grooves in which a block 8 can slide.` The purpbse of the block 8 will be beyond the spacer block thus forming a a room by lill@ sprocket wheel 11.

12 is an electric motor preferably arranged with its armature shaft in vertlcal position. The frame or casing of the motor is secured at the forward 'side to the main frame casting 1 and at its lower side to the shoe or platform 2. In this Way, as stated above, the casting 1, the motor frame 12 and the shoe 2 form one rigid bed frame structure. Mounted upon the frame of the motor 12 is a starting and reversin box 12a whichy may beof any usual or preferred construction.

At the upper end of the armature shaft of the motor 12 is a pinion 14 which meshes with an idler gear 15 journaled upon a suitable pin or stud secured to the motor frame. The gear 15 meshes with a large drive gear 16 which is keyed to a vertical drive shaft 17 in a manner to permit the shaft to move vertically. A casing 16al incloses the gears. The shaft 17 is provided with a shoulder at' 18 which engages the hub 19 and limits upward movement of the shaft with respect to the gear wheel.

Downward movement of the shaft is permitted under the control of the nut 2O which is threaded on the upper end of the shaft.

The nut 2O is held in vertically xed relationship to the gear wheel by means of the ring 21. The space beneath the ring 21 and surrounding the n ut may be used as a reservoir for oil for lubricating the shaft bear- 1n s.

t22 is a .drive elementfor-the drums which will be described below. Preferably this drive element is a rotatable sleeve having a central aperture through which the shaft 17 extends. The hub 19 of vthe gear wheel 1'6 is journaled in the central aperture by means ofthe bearing bushing 23, and the lower end of the shaft is journaled in this aperture/'by means of the bearing bushing 24. Formed on the sleeve 22 at the' upper end thereof is a horizontal flange or disk 25. At the outer edge of this disk 25 there is provided a spur gear 27 which is preferably formed as a separate ring secured to the disk.

Positioned below the disk 25- and secured to the main frame casting 1 is a supporting plate or bracket 28. This plate 28 is provided with a central aperture in which by means of a bearing bushing 29 there is journaled a hub 3() which is connected by a key 30a to the sleeve 22. By means of this bearing at 29 the upper end of the shaft and the associated parts are supported.

Secured to the plate 28 and positioned directly beneath the gear ring 27 is a similar gear ring 31. The rings 27 and 31 vare of the same size but are provided with different numbers of teeth. For example it may lbe considered that the ring 27 as ninety teeth and the ring 31 ninety-one teeth. 4. 32 is a bearing pin secured at its upper end to the web of the gear 16 and supported at its lower end by means of a stirrup 33 also secured to the web of the gear. Rotatably mounted upon the pin 32 '1s a pinion 34 of sufficient width to engage the teeth on the 'ring 27 and also those on the ring 31. It will be observed that on account of the difference in the numbers of teeth on the gears 27 and 31 the movable gear 27 will, for every revolution of the gear wheel 16, bemoved with respect to the lxed 'gear 31 through a distance equal to that A collar 36 threaded on the sleeve engages Y the lower side of the hub 35 and the. late 28 engages the upper side of the hu 30.-

The two hubs are in this way held against being moved away from each other. The

hub 35 is journaled in a bearing aperture of the bottom plate of the main casting 1 by means of a sleeve 37. By means of this bearing at 37 the lower ends of the sleeve 22 and of the shaft 17 are supported.

mal

Formed integrallyk with the upper hub 30 l,

is an outward projecting circular flange 38 which is provided at its outer edge with a downward projecting annular collar 39. Journaled on this collar 39 by means of a bearing bushing 40 is the hub 41 of a windl ing drum 42. Connecting the upper edges of the hub 41 and the drum 42 is a web 45. Extending from the lower edge of the hub 41 is an inward projecting plate or web 46, the inner edge of which rests upon a ball bearing 47. This ball bearing is supported upon. the hub 48 of a hand wheel 49. This hub 48 has threaded engagement with the sleeve 22. In the recess formed between the flange 38 and the web 46 are mounted the disks of a friction clutch 50. These disks are connected alternately with the web 46 and the flange 39 in the manner which is well known. It will be clear that by means of the hand wheel 49 the hub 48 can be turned and raised or lowered because of itsy threaded engagement with the sleeve 22. As

the hub 48- is raised the web 46 and the drum, 42 are 'raised and the friction disks of the` clutch 50 are forced Vinto engagement with' mamas relieved. In this way the drum 42 can be connected with or disconnected from the flange 39, the hub 30, and the sleeve 22.

For resisting the rotation of the drum 42 l provide a brake band 51 which is adapted to engage the outer surface of the' hub 41.`

The ends of this brake band 51 are secured to oppositely threaded nuts 52, 52, whichengage a similarly threaded shaft shaft is mounted in suitable bearings on the main frame' casting 1. By means of

hand wheels

54, 54, the shaft 53 can be rotated and the nuts 52, 52 can be moved toward or away from each other to tighten or loosen the brake band 51.

55 is a vsecond drum 'of considerably less diameter than the drum 42. This drum 55 is journaled on the sleeve 22 by means of the bearing bushing 56. The drum 55 is positioned directly beneath the hub 48 and a ball bearing 57v is interposed between the hub and the drum. Between the drum 55 and the hub 35 before referred to there are located the disks of a. friction clutch 58. rllhese disks are alternately connected with the'drum and with the hub in the well known manner. `When the hub 48 is turned in one direction by,means of the hand wheel 49, the disks of the clutch can be forced into engagement with each other, and when the hand wheel is turned in the other direction, the pressure between the disks can be relieved. 1n this way the drum 55 can be con` nected to or disconnected from the hub and the sleeve 22. lt will be noted that the same hand wheelA49y and the same central hub 48 controls the two clutches 50 and 58. `When the hand wheel is turned in one direction the clutch 50 is engaged and the clutch 58 is released. When the hand wheel is turned in the other` direction the clutch 58 is engaged and the clutch 50 is released. rThe two clutches cannot both be engaged at the same time.

Journaled on the shaft 17 at the lower end thereof is a sprocket wheel 59 over which the cutter chain 10 passes. 'llhis sprocket wheel 59 is provided at its lower edge with clutch teeth 60. r1`he lower end of the shaft 17 is provided with a clutch element 61 having radially extending teeth adapted to lie between and engage the teeth 60 when the shaft 17 is in its uppermost position. The teeth 61 can be disengaged from the teeth 60 by turning the nut 20 by means of asuitable wrench and thus lowering the shaft 17. By lowering the shaft farther the clutch element 61..can, when the machine is on a suitable truck, be brought into engagement with a clutch element onthetruck. A projection 62 on the lower cutterarrn plate 6 supports the sprocket wheel l59 when the shaft is lowered. i

63 is the/ feed rope connected to the drum 55 to be wound thereon. If the machine is to This vof the cable to the frame of the mining mabe fed toward the left, the rope is wound in the direction indicated in Fig. 1 and is passed off from the inner side of the drum toward the left. The end of the rope can, if desired, be secured to a jack or anchor '70 near the left rib of the room in which the machine is to be operated. However, l prefer to pass the feed cable about a suitable pulley at the left rib and to fasten the end chine. In order that the end of the cable may be easily fastened to the machine, l secure to it a llshaped button 64 which is adapted to be passed into a similarly shaped vertical slot 65 at the side of the main part of the casting 1 near its inner end. Two of these slots 65 are provided, one on each side,

\in order that the machine may be fed in either direction in a manner to be described. Adjacent each slot and extending into it are a number of holes 65a each adapted to receive a pin 65h. By means of one or more of these pins 65b the button 64 and the end of the cable, may be secured at any desired ele vation. rlhe advantage of this construction will be made apparent hereinafter.

In Fig. 5 1 have shown one form of pulley mounting whichmay be advantageously used at the right rib. This comprises a toothed base plate 66 carrying a cylindrical boss 67 upon which the pulley 68 is journaled. An annular lip 69 on the boss holds the pulley against displacement. The boss 67 is provided with a .cup or recess 70 in which can be placed the lower end of a jack 71. By means of this jack the whole device can be securely lclamped against the mine floor and held against displacement.

72 is a retarding cable connected to the drum 42 to be wound thereon. Mounted 105 upon transverse horizontal axes at the rear end of the machine are idler sheaves 7 3, 73, positioned with their .upper edges in horizontal alinement with the drum 42. 74, 74

are other idler sheaves mounted for rota- 11@ tion about horizontal longitudinal axes. Each of the sheaves 74, 74 is positioned to receive a` cable from the corresponding sheave 73 and to guide it across the rear of the machine. For feeding toward the left the rope 72 is passed from the drum42 over the left hand sheave 73 and under the sheaves 74, 74. The end of the cable is suitably secured by means of an anchor or jack at the right hand rib. A

When the machine is to be used in the usual manner for cutting from right to left. as indicated in Fig. 8, the feed and retarding ropes are arranged in the manner described and the motor 12 is started. From the motor 125 power is transmitted through the gears 14,

v15 and 16 through the shaft 17 to the cutter cham drive sprocket 59. By means of the

gears

32, 31 and 27 the .sleeve 22 is rotated slowly in the opposite direction from the 1115 shaft 17. The operator by means of the hand wheel 49 causes the engagement ofthe clutch 58 and thus connects the drum 55 with the sleeve 22. The drum 55 winds the- 5 feed rope 68 and the machine is thus drawn toward the left, the cutters on the chain being drawn into the coal. The rear end of the machine is retarded by means of the rope 72, rapid unwinding of this rope 42 10 being prevented by means of the brake 51..

behind the inner end. In case it is desiredfor any reason to more quickly angle the` machine toward the rear, this can be done by releasing the brake 51 and turning the hand wheel 49 to disengage the clutch 48 and engage the clutch 50. With the clutch 50 engaged, power will be transmitted :to

'25 wind the rope 72 and thus positively pull the rear end of the machine backward to ward the right rib.` I It willbe noted that the entire machine is perfectly symmetrical with respect to a central longitudinal plane and that the machine is therefore adapted to be operated in either direction. To adjust the machine for operation from left to right, as indicated in Fig. 9, it is simply necessary to reverse the 85 cutters of the cutter chain and to unwind the ropes from the drums and rewind them in the opposite direction. As each -drum can be readily controlled by means of its friction clutch, thev unwinding and rewinding can be 40 done by means of power. After unwinding and rewinding, the button 64 on the feed rope 63 is placed in the right .hand slot 65 and the retarding rope 72 is passed over the right hand sheave 73.

The adjustable attachment of` the feed rope makes it possible to vary theline of draft on the machine in accordance with the conditions'of operation. For inzance, if it is found .that there is a tendency or the forward edge of the shoe 2 to bear too hard against the floorand to dig in and catch, the tendency can be overcome by lowering the point of attachment. If, on the other hand, the conditions of cutting are such that kthere is a tendency for the forward edge of the cutter mechanism to work upward, the tendency can be overcome by raising the point of attachment ofthe feed rope. .By carefully watching the operation of the machine the operator can adjust the feed ropeV tothe most advantageous position.

While I prefer and have described an ar rangement in which the feed rope is doubled back on itself and connected with themavchine frame, it will b'luilders'tood that if 75 is passed through its central aperture to secure it in position. This jack, it will be understood, is adapted to engage the roof or coal face at its upper end and the floor at its lower end. This block 8 serves as a guide for the cutter arm as it is moved inward. The. feed rope 63 is passed forward 80 over a suitable idler pulley 76 mounted on the main frame casting 1, and the end of the cable is secured to the jack 75. By winding the feed rope the machine can be drawn directly inward until the sumping cut is completed. As the line of pull is central, it will usually be found that no guide for the outer end of the machine is necessary.

For handling the machine and moving it `from point to point about a mine room, use

can be made of the rope 72. In order that the rope 72 may be passed out from the rear end of the machine in any direction, there are provided idler sheaves 77, 77, mounted for rotation about vertical axes. 72 can be passed between these two sheaves and its end can be connected at any desired point. The operator, by engaging the clutch 50, can cause the rope 72 to be wound, and, in this way, the machine can be hauled in any direction. As the drum 42 is considerably larger than the drum 55, the rate of movement of the machine under the control of the -rope 72 is considerably greater than when it is being fed forward by means ofl the rope 63. In Fig. l1 I have shown the machine being hauled toward vthe right rib after makinga cut from right to left.

In order that my improved machine may be readily transported from place to place about a mine, I preferably provide in combination with it a truck such as shown in Figs. 6 and 7. As to the details of this truck there may be variation but the construction which I deem most advantageous is shown in the drawings. This construction is similar to that shown in my co-pending a plication for mining machinesand trucks, gerial No. 557,432, filed April 25, 1910. 1

The frame of the truck comprises the side rails 78, 78 and cross bars 79, 79, 80 and 81, 81. To the side rails are secured bearing

boxesA

82,82. for the

axles

83 and 84 to which are secured the

track wheels

85, 85,' and 86, 86.

Chains

86, 86 are provided for ,connecting the forward wheels with the rear axles. v The

wheels

85, 85 are not keyed di'- rectly to the forward axle. 83, but are rotatably mounted upon short shaftsl or pins 87, 87, which are secured at their inner,- 1.80

The rope mamas ends to the crank

arms

88, 88. lThese crank arms are keyed tothe ends of the axle 83.. This construction provides, ineffect, anaxle bent at fits two ends and the

Wheels

85, 85

. are thus mounted eccentrically with respect tion the mining machine can be readily moved onto or olf from it, and when the forward end of the truck is in its upper position the truck is adapted to be moved along the track. .Tn moving the machineV onto the truck thev cable 72 is passed to the rear between the sheaves 77,- 77, and is secured at a suitable point to the rear end of the truck. The operator by `engaging the clutch 50 can cause the cable to be wound and the machine to be moved bodily along the truck. Secured to the crank arms 88,

88 are

upstanding horns

89, 89 in position to be engaged by pins or rollers 90, 90 on the frame of the mining machine. When these pins 90, 90 are forced into engagement with the horns'89, 89 by the continued movement of the mining machine, the axle 83 is rotated and the truck is rai'sed to horizontal position.

When the mining machine is in proper position upon the truck the clutch element 61 at the lower end of the main power shaft 17 4is in mating position over a clutch element 91, which is mounted on 4the truck` frame for rotation about a vertical axis. This clutch element 91 is connected with a' drive sprocket'wheel 92, there being preferably interposed between the clutch element and the sprocket wheel an intermel di'ate drive plate 93 having grooves 93a and 93l disposed at right angles to each other and formed-to receive tongues carried by the clutch elementl 91 and the sprocket wheelI 92, respectively. The plate 93 'car ries at its center a block 93c which proJects across the grooves 93a and 93b and servesto keep the clutch element, drive plate and sprocket wheel part -incoperative relation to each other. This construe/tion,permitsl the clutch element and the sprocket .wheel to rotate about axes which are somewhat out of alinement. By lowering the shaft 17 suiliciently by means of the nut 20the clutch element 61 can be brought intoengagement with the clutch element 91 and power thus be transmitted from the mining machine motor to the truck. At theA rear end of the truck a vertical shaft 94 is provided. This. shaft carries a sprocket wheel in horizontal alinement with the sprocket wheel92 and over these two sprocket wheels there passes a drivechain 95. Secured to the shaft 94 is a bevel gear 96 which meshes with two other bevel gears 97 and 98 loosely mounted on a transverse shaft 99. By means of suitable clutches controlled by the hand wheel 100 either of the gears 97 or 98 can vbe operatively connected with the shaft. At .one end of the shaft 99 is a` sprocket wheel be transmitted from the shaft 94 to drive,

the. shaft 99 in either direction, and from the shaft 99 power can be transmitted to drive the'truck axles. rTherefore by means of the hand wheel 100 an operator can cause the truck to be driven in either direction as desired.

Preferably I provide at the rear of the truck a cable reel 104 for winding and unwinding an electric cable 105. This reel is driven by means of a rope belt 106, which passes over a sheave 107 on the power shaft 99. It will be clear that the direction of rotation of the reel is reversed whenever the direction of movement of the truck is reversed. Current is transmitted from the cable and the reel to the mining machine ymotor, by means of an intermediate conduc- -tor cable 108. T do not herein claim the reel do T claim herein the truckvin combination with the. mining machine broadly as lthat .constitutes the subject-matter of my pending application for mining machines and trucks, Serial 14910.

What 1 claim is 1. 1n a mining machine, the combination of a bed frame, a cutter chain, a support for the vcutter chain mounted on the bed frame and serving to guide the chain in a horizontal path, a sprocket wheel for driving the cutterv chain, a clutch element on the sprocket wheel, a vertical drive shaft in axial alinement with the sprocket wheel and extending upward to the top of the machine, a motor connected with the shaft, a clutch element onthe lower end of the shaft, and a device at the upper end of the shaft for moving it vertically to bring the clutch element thereon into or out of enga ement with the clutch element on the sproc et wheel.

`2.` In a mining machine, the combination No. 557,432, filed April -25,

ila

of a bed frame, a cutter chain, a support for the cutter chain mounted on the bed frame and serving to guide the chain in a horizontal path, a sprocket wheel for driving the cutter chain, a clutch element on the vsprocket wheel, a vertical drive shaft in axial 'alinement with` the sprocket wheel' and extending upward to the top of the ma7 chine, a motor connected. with the shaft, a clutch element on the lower end of the shaft, a device at the upper end ofthe shaft for moving it vertically to bring the. clutch'A element thereon into or out of engagement cured at a fixed point to cause the bodily v movement of the cutter chain and support as the drum is rotated.

3.-In' a mining machine, the combination of a bed frame, a cutter chain, 'a supportfor the cutterchain mounted on the bed frame and serving to guide'the chain in a horizontal path, a sprocket wheel for driv ing the cutter chain, a vertical drive shaft connected with the sprocket wheel in alinement therewith, a motor connected-withthe dr.ive'sha;tt,.a rotatable drum mounted con# centrically with the drive shaft, mechanism for transmitting the power of the motor to rotate the drum, and a rope engaging the drum and adapted to haveits end secured a't a fixed lpoint tocause the bodily movement ofthe cutter chain and support as the drum is rotated.

4. In a mining machine, the combination of a bed frame, a cutter chain, a support for the .cutter chain mounted on the bed frame and servingtoA guide the chain in a horizontal path, a sprocket wheel for ldriving the cutter chain, a vertical drive shaft connected with the sprocket wheel in alinement therewith,y a motor connected'with the drive shaft, ytwoy `rotatable drums mounted concentrically with the drive shaft, mechanism for transmitting the power of the motor toI rotate one ofthe drums, a rope engaging the said drum and adapted to have lts endsccured to a fixed point to cause the movement of the cutter chain and support as the drum is'rotated, a rope ,engagingthe other drlm and adapted to have 'its end secured at a xed point, and means connected with the said other drum for tensioning the said rope. 5. yIn a mining machine, the combination of a bed frame, a cutter chain, support for the cutter chain -mounted on the bed"l frame and serving to guide the chain in a horizontal path,a sprocket wheel for driving the cutter chain, a motor connected with the sprocket wheel, a 'vertical drive element with respect to4 the drive element, and a rope engaging theI drum and' adapted to have its end secured at -a fixed point to cause the bodily movement l of the cutter a chain and support as the drum is rotated.

6. In a mining machine, the combination of a bed frame, a cutter chain, a support for t-he cutter chain mounted on the bed frame and serving to guide the chainlin a horizontal path, a sprocket wheel for driving the cutter chain, a motor connectedfwith the sprocket wheel, a drive` element connected with the motor, two rotatable drums mounted concent'rically with the drive element, a hand-wheel between the two drums having threaded engagement with the driv-A ing element, two clutches connected with the hand wheel to becontrolled by its rotation with respect to the drive element, one clutch serving to connect one drum with the-drive element and the other clutch serving to connect the other drum with the drive element,

and two ropes respectively engaging the drums andadapted to have their ends secured at fixedV points whereby force can be applied tothe cutter chain support/.through elth'er, rope when the corresponding drum is rotated. v

' 7. In a mining machine, the combination of a movable 4bed frame, a, horizontally projecting cutter arm rigid withthe bed frame, a cutter chain supported on andguided V.by the cutter arm, a sprocket wheel engaging the cutter chain to drive it, a vertical drive shaft connected to the sprocket wheel in axial alinement therewith, a motor connected with the drive shaft, a rotatableV winding drum mounted concentrically with the drive shaft, mechanism for transmitting the power of the-motor to rotate the drum, and a Ifeedv rope engaging the drum andadapted to'lextend to1 a. fixed point external to the machine to cause bodily movement of the machine as Athe drum is rotated.

8'. In a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame,

a cutter chain supported on and guided by the cutter arm, a 'sprocket wheel engaging asl 1,243,422 l i n 9. ln a mining machine, the combination.

' of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel engaging the cutter chain to drive it, a vertical drive sha-ft connected to the sprocket wheel in axial alinement therewith, a motor connected with the drive shaft, a rotatable sleeve within which the drive shaft is journaled, meclr.

anism for transmitting the power ,of the motor to rotate the sleeve at a speed different from that of thesh-aft, a rotatable winding drum mounted concentrically with the shaft i and the sleeve, a manually controllable clutch between the sleeve and the drum, and a feed rope engaging the drum and adapted to extend to a fixed point external to the machine to cause bodily movement ofthe machine as the drum is rotated.

10. ln a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel engaging the cutter chain tol drive it, a vertical drive shaft connected to the sprocket Iwheel inl axial alinement therewith, a motor connected with the drlve shaft, means comprising a draft rope acting on the, inner part of the bed frame to advance the machine laterally along the face of the coal, a rotatable drum mounted concentrically with the drive shaft, a brake for resisting the rotation of the drum, and a rope engaging the drum and adapted to extend rearward from the outer end of themachine to a fixed abut-ment.

`11. ln a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel engaging the cutter chain to drive it, a vertical drive shaft connected to the sprocket. wheel in axial alinement therewith, a motor connected with the drive shaft, means comprising a draft rope acting on the inner part of the bed frame ,to advance the machine along the face of the coa-l, a rotatable drum mounted concentrically with the drive shaft, a releasable brake for resisting the rotation. of the drum, mechanism comprising a clutch for transmitting the power of the motor to rotate the drum, and a rope engaging the drum and adapted to extend rearward from the outer end of the machine to a fixed abutment, whereby movement of the machine can be resisted when the brak-e is applied and whereby the machine can be moved when the clutch is engaged.

12. ln a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame.y a cutter chain supported on-and guided yby the cutter arm, a sprocket wheel engaging the cutter chain to drive it, a motor counected with the sprocket wheel, two drums mounted n the frame for rotation about the same axis, mechanism for transmitting the power of the motor to-rotate one drum, a feell rope engaging the drum and adapted to exten d toa fixed point external to the machine to ca use bodily movement of themachine as the drum is rotated, a brake for resisting' the rotatioa of the other drum, and a retarding rope en gaging the said other drum and adapted to extend to a fixed point external to the machine, whereby the movement of the machine can be resisted.

13. ln a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported and guided b v the cutter arm, a sprocket wheel engaging the cutter chain to drive it, a motor connected with the sprocket wheel, two drums mounted on the frame for rotation about the same axis, mechanism comprising manually controllable clutches for transmitting the be bodily moved as the said drum'is rotated,

a'. releasable brake for resisting the rotation of the other drum, and a rope engaging the said other drum and `adapted to extend to a fixed point external to the machine, where by the machine can be moved when the drum is rotated and whereby movement of the machine can be resisted when the brake is applied. I

14. ln a mining machine, the combination of aA movable bed frame, a horizontall)T projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel by means of which the cutter chain is driven, a vertical drive shaft connected to the sprocket wheel in axial ali nement therewith, a motor connected with the drive shaft, two rotatable drums mounted concentrically with the drive shaft, mechanism for transmitting the power of the motor to rotate one drum. a feed rope engaging the drum and adapted to extend to a fixed point external to the machine to cause bodily movement of the machine as'the drum is rotated, a brake for resisting the rotation of the other drum, and a retarding rope engaging the said other drum and adapted to extend to a fixed point external to the machine, whereby movement of the `machine can be resisted.

titl

, tion of a -movable bed-frame, a horizontally projecting cutter arm rigid .with the bed frame, Ia cutter chain supported on and lguided by the cutter arm, a sprocket wheel by means of which the cutter chain is driven, a vertical drive shaft connected to the sprocket wheel in axial alinement therewith, a motor connected,r with the drive shaft, two

rotatable winding drums mounted concentrically Vwith the drive shaft, mechanism for transmitting the power of the motor to rotate either'of the drums, a feed rope engaging one drum and adapted to extend to a fixed pointfexternal .to the the nachine can be bodily moved as the said drum is rotated, a releasable brake for resisting the rotation of the other drum, a rope engaging the said other drum and adapted to extend Ito a fixed point external to the machine, whereby the machine can be moved .when the drum is rotated and whereby the'movement of the machine can be resisted when the brake is applied.

16. In a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel by means of which the cutter chain is driven, a motor connected with the sprocket wheel, two ro ',tatable drums mounted` for rotation about the same axis, the drums being of' different diameters, mechanism .for transmitting the power of the motor to rotate either the smaller drum at aI definite angular speed or the larger drum at. the Vsame angular speed,

a brake 'for resisting the rotation of the larger drum, a -feed -rope engaging fthe smaller drum and adapted to extend to ka fixed point external tothe machine to cause bodily movement of the machine as'the drum -is rotated, and a' rope engaging the larger drum and adapted to extend to a point external to the machine, whereby thev machine can be moved when the drum is rotated and whereby movement of the machine can be vresisted when the brake is applied.

17. In a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on andguided by the cutter arm,

of which the cutter chain is driven, a motor vconnected with the sprocket wheel, a rotatable drive element connected with the nio tor, two rotatable drums mounted for rotation about the axis of the drive element, the drums being of dierent diameters, clutch mechanism for connecting either of the drums with the drive element for rotation synchronously therewith, a releasable brake for resisting the rotation of the larger drum, a feed rope engaging the smaller drumf and adapted to extend to a fixed point external machine whereby` a sprocket wheel by -means` to the machine to cause bodily movement of the machine as the drum is rotated, and a rope engaging the larger drum and ada ted to extend to a point external to the mac in'e whereby the machine can be moved when the drum is rotated and whereby movement-,of the machine can be resisted when the brake is applied.

18. In a mining machine, the combina-y tionof a movable bed frame, a horizontally projecting cutter arm rigid with the jbed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel by ,means of which the cutter chain is driven, a motor connected with the sprocket wheel, a rotatable drive element connected with the motor, a rotatable drum mounted for rotation about the axis of the drive element, a hand-wheel adjacent the drum and having threaded engagement with the drive element, a clutch for connecting the'drum with the drive element, the clutch being controlled by the movement of the ha'nd wheel with respect to the drive element, and a rope engaging the drum and adapted to extend to a fixed point to cause bodily so. j

movement of the machine as the drum is l jecting cutter arm rigid with the bed frame,

a cutter chain supported on and guided by the cutter arm, -a sprocket wheel by means A of which the cutter chain is driven,l a motor connected with the sprocket wheel, a rotatable driveelement connected with the motor, two rotatable drums mounted 'for rotay tion about the axis ofathe drive element, a,

hand-wheel between the two drums having 105 threaded engagement with the drive element, two clutches connected with the hand wheel to be controlled by its rotation with respect to the drive element, one clutch serving to connect one drum with the drive element and the other serving to connect the other drum with the drive element, a feed .rope engaging one drum and adapted to extend 'to a vfixed point external to themachine to cause bodily movement of the machine as the drum is rotated, a releasable brake `for resisting the rotation of the other drum,a ropeengaging the said other drum and adapted to extend to a point external' to the machine whereby the machine can bel moved when the drum is rotated and whereby movement of the machine can be resisted when the brake is applied.

.20. Ina mining machine, the combination of a movable bed frame, a horizontally nrojecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by4v the cutter arm, a sprocket wheel by means of which the cutter chain is driven, a clutch' element on the sprocket wheel, a motor,a f

vertical drive shaft connected with the momaratea tor and mounted in axial alinement with the sprocket wheel, a clutch velement on the shaft. a manually operable device for moving the shaft vertically to bring the clutch element thereon into or out of engagement with the clutch element on the sprocket wheel, a rotatable drum mounted concentrically Vwith the drive Y shaft and fixed against movement vertically, mechanism for transmitting the power of the motor to rotate the drum, and a feed rope engagin the drum and adapted to extend to a x(fixed point external to the machine to cause bodily movement of the machine as the drum is rotated.

21. In a mining machinefthe combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame, a cutterchain supported on and guided by the cutter arm, a sprocket wheel by means of which the cutter chain is driven, a clutch element on the sprocket wheel, a motor, a vertical drive shaft connected with the motor and mounted in axial alinement With the sprocket wheel, a clutchelementon the.

shaft, a manually operable device for moving the shaft vertically to bring the clutch element into or out of engagement With the clutch element on the sprocket wheel, two rotatable drums mounted concentrically with the drive shaft and fixed against movement vertically, mechanism for transmitting the power of the motor to rotate one drum, a

feed ropeengagingthe drum and adapted to extend to a lixed `point external to the machine vvtohcause, bodily movement 0f the machine as the drum is rotated, a Abrake for resistingthe rotation of the other drum, and

a retarding rope engaging the said other drumand adapted to extend ,to a Iixjed point external to the machine, whereby movement of the machine can bejresisted. y y y 22. In a mining machine, the combination of a vIidvable bed frame, "a horizontal cutting apparatus projecting from the inner end .of the.- ed frame, propelling mechanism comprising a Winding drum and afeed rope having' one end ixedly attached to` vsaid Winding 'drum andadapted l'to be extended either toward the, right orvtoward the left to exert a propelling draft in eitherofsaid directions on the inner part of the bedlfr'aln'e, a motor for driving the cuttiny apparatus and the said winding drum, an Vmeans for guidingthe outer end of theumachine comprising a `winding drum, a; rope having one end ixedly attached to said drum means for retardin the last said drum while under the tension rom the rope affixed thereto, and a plurality of guide sheaves on the bed lframe arranged so that the last named rope canb'e carried off from its winding` drum either-toward the left or toward the right to a fixed abutment.

23. In a mining, machine, the combination of a movable bed ffame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket wheel by. means of which the cutter chain is driven, a vertical drife shaft having its axis in the central longitudinal plane of the machine and connected at its lower end with lthe sprocket wheel, a motor connected With the shaft, two rotatable drums mounted concentrically With the shaft, means for transmitting the power of the motor to one drum to drive it in either direction in accordance with the direction of rotation of the motor, a feed rope connected with the drum to be Wound thereon in either direction according to the desired direction of machine movement, the end of the rope being adapted to extend to a fixed point on either side of the machine whereby the machine can be bodily moved toward the right or left as the drum is rotated, a brake for resisting the rotation of the other drum in either direction. and a fili -retarding rope connected with the said other drum to be Wound thereon in either ldirection according to the desired direction of machine movement, the end of the rope being adapted to extend to a fixed point on either side of the machine whereby movement of the machine toward the right or left can be` ya5 resisted. Y Y

24. In a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid dwith bed frame, a cutter chain supported on and 'guided by the Iwo cutter arm, a sprocket Wheel by means of v which the cutter chain is driven, a motor connected with the sprocket Wheel, a rotatable drum mounted on the frame, mechanism for transmitting the Ypower of the mow tor to' rotate the drum, a rope connected at one end With the drum toy be Woundthereon, a pulley adapted to be engaged by the rope between its ends and to be secured in place at a point external to the machine, and No means for securing the otherI end of the rope to the bed frame at any one of a plurality of elevations. y Y t l 25. In a mining machine, the combination of a movable bed frame, a horizontally pro- Ma jecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arm, a sprocket Wheel by means of Which the cutter chain is driven, a motor connected with the sprocket wheel, a rotatala@ 4ble drum mounted lon the frame, mechanism V,aus

machine and on either side thereof according to the desired ,direction of machine movement, and means for securing the other end of the rope to the bed frame at either side thereof and at any one of a plurality of elevations.

26. In a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame and provided with a central longitu# dinal slot, a cutter chain supported on and guided by the cutter arm, a sprocket wheel for driving the cutter chain, a motor connected with the sprocket wheel, a guide block adapted to rslidably engage the slot in' the cutter arm, a jack for securing the guide block against movement, a rotatable drum on the bed frame connected to be driven by the motor, a rope connected with the drum t'o be Wound thereon, means for connecting the end of the rope with the jack and block at a point in the central longitudinal plane of the machine, whereby the machine as a whole may be moved longitudinally inward to make a sumping cut.

27. In a mining machine, the combination of a movable bed frame, a horizontally projecting cutter arm rigid with the bed frame and provided with a central longitudinal slot, a cutter chain supported on and guided by the cutter arm, a sprocket wheelA for driving the cutter chain, a motor connected with the sprocket wheel, a guide block adapted to slidably engage the slot in the `cutter arm, va jack for securing the guide block against movement, a rotatable drum on the bed frame connected to be Vdriven by the motor, a rope connected with the drum to be wound thereon, means for guiding the rope to cause il to extend from the bed frame substantially in the central longitudinal plane of the fnachineand means for connecting the end of the rope with the jack and block at a point in the central longitudinal plane of the machine, whereby `the machine as a whole may be moved longitudinally inward to make a sumping cut.

28. In a mining apparatus, the combination with a mining machinebed frame, cutting apparatus carried. thereby, av motor on.

the bed frame for driving the cutting apparatus, a vertical drive shaft on the mining Y machine, a clutch element at the lower end of the drive shaft, and a manually operable device at the upper end of the shaft flor moving the shaft and the clutch element vertically with respect to the bed frame, of a wheeled truck upon which the mining machine can be supported, and a clutch element on the truck connected with the wheels thereof, the said clutch element being in position to be engaged by the clutch element on the mining machine when the machine is in place on the truck.

29. In a mining apparatus, the combina-- tion of a mining machine bed frame, a cuttionengaging the clutch Aelementl on the sprocket wheel, a wheeled truck upon which the mining machine can be supported, and a clutch element on the truck connected with the wheels thereof, the said clutch element being in position to be engaged by the clutch element on the mining machine when the machine is in place on the truck.

30. In amining-apparatus, the combination of a mining machine bed frame, a'horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided yby the cutter arm, a sprocket wheel byl means of which the cutter chain is driven, a clutch element on the sprocket wheel, a vertically movable shaft on which the sprocket wheel is journaled, a clutch element on the lower end of the shaft adapted to engage the clutch element on the sprocket wheel, a motor connected with the shaft, a device, at the upper end of the shaft -for movin it vertically to bring the clutch element t ereon into or out of engagement with the clutch `element on the sprocket wheel, a wheeled truck upon which the mining machine can be supported, and a clutch element on the truck connected withi the wheels thereof, the said clutch element being in po-.

sition to be engaged by the said clutch element o n the shaft when the mining machine is in place on the truck., f

31. In a miningI apparatus, the combination of a mining machine frame, a horizontally projecting cutter arm rigid with the bed frame, a cutter chain supported on and guided by the cutter arII1'-,'.a.sprocket.wheel.

by means of which the cutter chain is driven, a motor connected with the sprocket wheel,

a drum connected with the motor through a j -which the machine will be drawn when the Lam/tez second drum is rotated to wind its rope, and a. friction brake adapted to resist the unwinding of the second rope from the second mentioned drum, all as and for the purposes set forth.

32. In a mining machine, the combination of a bed frame, a cutter chain, a support for the cutter chain mounted on the bed frame andserving to guide the chain in a horizontal path. a clutch elementen the sprocket wheel, a verticall drive shaft in axial alinement with the sprocket wheel and extending upward to the top of the machine, a lnotor connected to the shaft, a clutch element on the lower end of the shaft, and a device for moving the shaft axially to bring the clutch element thereon into or out of engagement with the clutch element on the sprocket wheel.

33. In a mining machine, the combination of a bed frame, a cutter chain, asupport for the cutter chain mounted on the bed yframe and serving to guidethe chain in a horizontal path, a sprocket wheel for driving the cutter chain, a clutch element onthe sprocket wheel, a vertical driveshaft in axialalinemen't with the sprocket wheel and extending upward to the topl of the machine, a. motor connected with the shaft, a4 clutch element on the lowerend o f theshaft, a device for moving the ,shaft axially to bring the clutch element thereon into or out of engaget ment with the clutch elementen the sprocket wheel, a rotatable drum mounted conc-entrically with the drive shaft and fixed against relative axial movement, V,mechanism for transmitting the power of the motory to ro-l tate the drum, and a rope engaging the drum and adaptedrto have .its end secured at a fixed point to ycause thebodily movement of the cutter chain and support as the drum is rotated. v-

34. In a mining machine,- the *combination of a .bed frame, a cutterl chain, a sup,- port for, the cutter chain mounted on the bed frame and serving .toguid'e the Vchainpin a horizontal path,y a sprocket wheel for driving the cutter chain, aj vertical driveshaft in alinement therewith, a disengageable clutchA between the driveshaft and the 'sprocketwheeh a motor connected with the driveishaft a man@ ,drum mounted @0n- Centially with, the drive Shaft iflhfiism ,feixtrasrhttg th rever Qf the .meter t0 rotate the drum, and a :ropeengagingthe diuimefld adapted, t0, :have itsfed `secured ata ixedpoint4 to causethe bodily movement of the cutter chain and support as the r drum isgrotated. j y3511i a` mining machine, the combination of amovable bedframe, cutting apparatusprojecting from thevinnerendof the bed frame, Winding drum rotatably mounted 0n the bed frame, a draft ropehinting one end connected to said drum and Vadapted to extend along the face of the coal to exert a forward draft on the inner part of the bed frame, means for adjusting the line of draft of said rope on the machine upward and downward, a motor on the bed frame for driving the cutting apparatus and the winding drum, and. means for applying a retard..- ing force to the outer part of the bed framel 3G. In a mining machine, the combination of a movable bed frame, a 'cutter bar having a longitudinal slot rigid with the bed frame and projecting from the inner end thereof, al cutter chain supported on and guidedby the cutter bar, an apertured guide block slidablyvmounted in the slot of the cutter bar, a jack adapted to pass through the aperture of the guide block and engage the -ioor of the mine and roof at points in the longitudinal vertical plane of the cutting apparatus, a draft rope, rotary mechanismen the bed frame cooperating with the draft rope to create a tension therein, said rope being adapted to be carried inward from the bed frame to a fixed abutment so that its tension will tend to advance the machine longitudinally, and a motor on the bed frame for driving the cutter chain and the said rotary mechanism.

37. In a mining machine, the combination ofa movable bedframe, a cutter` bar rigid with the bedframe and projecting from the inner end thereof, a sumpingguide device adapted to slidablyengage the cutter bar and beiixed in position while the cutter bar and bed frame" advance longitudinally into the coal, Aandmeans for applying aforce to 'the machine in the central longitudinal plane thereof to force it'as an entirety longitudinally toward the face ofthe coal. j

.38., In a miningrmachine, the combination of a movable bed frame, a horizontallyprojecting cutterarm rigid lwith the bed frame, a Cutter Chailupported entend guided by the cutter arm, 4afs'procket4 wheel engaging the cutter chainI` to drive it, means foradvancing the machine laterally along'the face of the -coal 'comprisinga wndingdrum and a 4draft ropeixedly.; fastened thereto and adapted to extend along the face of the coal and `exert a forward draft on the innerend' of thebed frame, mea-ns adapted to retard theouter end of the bed frame comprising a frictionally controlled. Wirjding'drumand a `'rope fixedly, fastened thereto and adapted to extend rearward j from ,the Outer end 0f the machineto: a Vfixed abutment, a motor, dPiVUgOIHiGCOnS. adapted@ cause the power of :the motor to` actuate, the cutter chain andA said winding drums, and means for rendering inoperative the driving connectionsv between lthe motor and the cutter chain, and between the lmotorand the feeding drum, whereby theretarding drum and rope can bedriven independently of the cutter chain and of the feeding drum to move the machine bodily over the mine ioor when the cutter chain is idle.

39. In a mining machine, the combination of a bed frame, cutting apparatus projecting from the inner end of the bedframe, a winding drum mounted on the bed frame, a feed cable having one end secured to said vwinding drum and adapted to exert a forward draft on the inner part of the bed frame to propelthe machine along the face of the coal, a second winding drum mounted on the bed frame, a retarding cable having one of its ends attached to the last named winding drum and being adapted and arranged to extend rearward lfrom themachine to an anchor or the like and exert a retarding .draft on the outer part of the bed frame, a

motor on the bed frame, driving connections between the motor and the cutting apparatus, driving connections comprising a disengageable clutch between the motor and the first named winding drum, and driving connections between the motorand the retarding cable drum rotating in a direction -to wind up the retarding cable, said ldevices comprising adjustable yieldable friction parts adapted when tightened to cause rotation of the drum in the direction to wind up the retarding cable and when loosened to permit rotation of the drum in the opposite direction with various degrees of frictional resistance.

40. In a mining machine, the combination of a bed frame, cutting apparatus projecting from the inner end of the bed frame, a power actuated cable arranged to exert a forward vdraft on the inner part of the bed frame to propel the machine along the face ofy the coal, a retarding cable arranged to exert a rearward draft on the outer part of the bed frame, a winding drum on the bed frameto which one end of the retarding cable is attached, disconnectible power actuated driving devices for the said drum rotating in a direction to wind up the retarding cable, and friction devices adaptedto resist the rotation of the drum in the opposite direction when the said driving devices are not in effective operation.

4.1. In a mining machine, the combination of a bed frame, cutting apparatus projecting from the inner end of the bed frame, a winding drum mounted on the bed frame, a feed cable having one end connected to the winding drum and arranged to exert a forward draft on'the inner part of the bed frame to propel the machine along the face of the coal, a second winding drum mounted on the bed frame, a retarding cable having' one end secured to the winding drum and being adapted to extend rearward from the machine to an4 anchor or the like and exert a retarding draft on the outerpart of the bed frame, a motor on the bed frame, gearing between the motor and the first named winding drum adapted to drive said rum at a relatively slowspeed, and gearin between the motor and the retarding cable drum adapted to drive the latter at a relatively fast speed, the last lnamed gearing comprising a manually operable friction clutch by which the rotation of the retarding drum can be controlled at will.

42. In a mining machine, the combination of a bed frame, a horizontal cutting apparatus projecting from the inner end of the bed frame, propelling mechanism comprising a winding drum and a feed rope connected to said drum and arranged to extend forward to exert a propelling draft on the inner part of the bed frame, guiding means for the machine comprising a frictionally controlled winding drum and a rope connected to said drum and arranged to'eXtend rearward to exert a retarding draft on the outer part of the bed frame, a motor on the bed frame, driving connections between the motor and cutting apparatus, and two trains of gearing adapted to transmit power of the motor to the winding drums, respectively, and comprising two manually controlled coaXially arranged friction clutches, one adapted to transmit power to the propelling drum and the other to the guiding drum. 1

In testimony whereof I affix my signature, in presence of two witnesses.`

NILS DAVID LEVIN.

Witnesses:

DUDLEY T. FISHER, G. B. NoRRIs.