US1891719A

US1891719A - Mining machine

Info

Publication number: US1891719A
Application number: US157005A
Authority: US
Inventors: William T Mccullough
Original assignee: Goodman Manufacturing Co LP
Current assignee: Goodman Manufacturing Co LP
Priority date: 1926-12-25
Filing date: 1926-12-25
Publication date: 1932-12-20
Anticipated expiration: 1949-12-20

Description

Dec. 20, 1932. w. T. MCCULLOUGH MINING MACHINE Original Filed Dec. 25, 1926 4 Sheets-Sheet l I m m m B I W q a h I 4 n w J- Dec. 20, 1932. w. 'r. MCCULLOUGH MINING MACHINE Original Filed Dec. 25, 1926 4 Sheets-Sheet 2 L v a xi I!!! Dec. 20, 1932. w, T, MCCULLOUGH 1,891,719

MINING MACHINE Original Filed Dec. 25, 1926 4 s t 5 3 Fig/l jkvenlor Dec. 20, 1932. w, T, MCCULLOUGH 1,891,719

MINING MACHINE Original Filed Dec. 25, 1926 4 Sheets-Sheet 4 11709] 1 for UNITED STATES PATENT OFFICE mm '1. IGCULIIOUGH, OI OHIGAGO, ILLINOIS, ASSIGHOB '10 ooonm WAG- I'URIHG COMPANY, 01 CHICAGO, ILLINOIS, A CORPORATION 01' ILLINOIS IDI'ING MACHINE Application filed December 25, 1926, Serial No. 157,005. Renewed September 10, 1881.

This invention relates to improvements in mining machines, and more particularly to coal cutting machines of the type mounted on track guided trucks adapted to cut a kerf in front of and to each side of the track along the mine bottom or at various elevations with respect thereto, and also adapted to be swung into various positions for cutting shearing or angular kerfs. A

The principal objects of my invention are to provide a new and improved machine, of the class described, constructed with a view towards maximum efiiciency, simplic ty, compactness, and adaptability to varying conditions of cutting, wherein the cutter arm may be positioned for cutting the usual slabbing or arcuate kerfs in several planes are]- lel to the mine bottom including planes slow the level of the track; wherein the cutter arm may be yieldably adjusted for cutting along an uneven bottom; and wherein said cutter arm may cut a ular or vertical shearing kerfs at either si e of the longitudinal center line of the cutter arm.

Further objects and advantages will appear from time to time as the description proceeds.

The invention may be best understood by reference to the accompanying drawings wherein:

Figure 1 is a plan View of the front end of the machine in partial section;

Figure 2 is a plan view of the complete machine with the cuttin element disposed for cutting a shearing ker with parts broken away and in section to more clearly show the details of my invention;

Figure 3 is a side elevation of the machine as shown in Figure 2, with parts broken away to show the turn-table gearing;

Figure 4 is a side view of the complete cutting mechanism showing both the cutter head and the tilting mechanism in section;

Figure 5 is a front end view of the machine with the cutter arm in position for cutting a shearing kerf and with parts broken away in section to more clearly show the details of my invention; and

Figure 6 is a rear end detail view of the tilting mechanism with parts broken away and in section.

Referring now in particular to the details of the drawings, the device embodying my invention includes a main frame or truck 10 mounted on

suitable track wheels

13, 13 in a usual manner. The main frame or truck 10 has a turntable 12 mounted thereon adjacent the forward portion thereof in such a manner that its axis of pivotal movement is between the axes of the

track wheels

13, 13. Cutting mechanism, generally indicated by reference character 11, is mounted on the turntable 12 on suitable trunnion supports adj acent one end of said turntable and yieldab y ad 'ustable with respect to said turntable about t ese trunnion su ports to permit tiltmg of said cutting mec anism to accommodate said cutting mechanism to an uneven mine bottom or irregularities in the coal seam III a manner which will hereinafter be described.

The cutting mechanism 11 includes a motor of an ordinary ty e and a frame member or cutter head 17 disposed forwardly of said motor for rotation with respect thereto about a longitudinal axis. A suitable cutting element includin a projectin cutter arm 14 is carried by t e cutter head 17 for movement therewith and for adjustment with respect thereto.

The cutter head 17 has a rearwardly ex tending neck 18 adapted to be journaled within a bearing 19 formed internally of a housing 20 secured to and extending forwardly of the casing for the motor 60 which permits said cutter ead to be adjusted with res ect to the truck 10 about an axis extending ongitudinally of the cutting mechanism 11.

The cutter arm 14 is provided with a cutter chain 15 guided thereabout in suitable guides 16 in a usual manner for movement thereabout in a closed orbital path.

With reference in detail to the means for supporting the cutter head 17 for movement about an axis extending longitudinally of the cutting mechanism 11 and housin 20, an auxiliary outboard supporting brac et 23 is secured to the to surface of said housing and extends forward y therefrom over said cutter head and has a forward end 22 journaled on a stud 21 formed integral with and extending forwardly of the forward end of said cutter head. A flange 24 is formed integral with and extends outwardly from the outer periphcry of the neck 18 of the cutter head 17 and is guided in a suitable guide groove 25 formed in the undersurface of the outboard supporting bracket 23 adjacent the forward end of the housing 20 for holding said cutter head in position with respect to said housing, and permitting relative rotation of said cutter head with respect to said housing.

A segmental worm gear 8 1 is secured to the outer eriphery of the neck 18 of the cutter head 1 forwardly of the flange 24 by means of suitable studs and nuts or cap screws in a usual manner. The segmental worm gear 84 is meshed with a worm 85 which is mounted on a transversely extending shaft 86 disposed above said segmental worm gear and mounted in suitable bearing supports formed integral with the outboard supporting bracket 23 (see Figs. 1, 4, and 5). Suitable means are provided for rotating the shaft 86 and worm 85 which may be of any type well known to those skilled in the art, such as a hand crank of a usual construction (not shown) adapted to fit on a squared end of said shaft.

It ma thus be seen that the cutter head 17 is rigidly supported for rotation about an axis extending longitudinally of the housing 20 and that said cutter head may be so adjusted by means of the worm 85 and worm gear 84 in an obvious manner and held in any desired position of adjustment during the cutting operation by means of said worm and worm gear which are of the self-locking type.

The means for supporting the cutting element and cutter arm 14 by the cutter head 17 for pivotal movement with respect thereto about an axis perpendicular to the axis of rotation of said cutter head, and for movement towards and away from said cutter head in a plurality of parallel planes is as follows:

The cutter arm 14 is carried by an extension arm 30 of a revoluble cutter arm support 31 in a usual manner. The cutter arm support 31 is carried by suitable guides for movement towards and away from the cutter head 17 in a manner which will hereinafter be more fully described and is mounted concentrically of a hub portion 32 of a cutter chain drive sprocket 33, which sprocket is adapted to mesh with the cutter chain 15. The cutter chain drive sprocket 33 being journaled within the cutter arm support 31 is keyed on the outer end of a splined drive shaft 34 which is rotatable about an axis disposed perpendicularly to the axis of pivotal movement of the cutter head 17 A nut 35 is threaded on the outer end of the splined drive shaft 34 and abuts the outer end of the sprocket 33 for holding said sprocket on said shaft.

A thrust ring 36 is threaded on the inner end of the hub portion 32 of the cutter chain drive s rocket 33 and has bearin support in a suitable recess formed in the inner surface of the cutter arm su port 31 and forms a means for holding sai cutter chain drive sprocket in said support.

The splined drive shaft 34 has a slidable drive connection in a hub 66 of a bevel gear 65, which bevel gear is driven from the motor 60 in a manner which will hereinafter be more fully described, for driving the cutter chain 15 about the cutter arm 14. The hub 66 of the bevel gear 65 is journaled in and extends throu h a bearin 67 formed in the cutter head 1 the shoul er of which bearing serves as a thrust bearing for said bevel gear.

The cutter arm sup ort 31 is provided with an annular recess 38 formed in the inner surface thereof, which annular recess forms a bearing support for an annular support member 37. The annular support member 37 is in turn slidably supported by suitable guides extending from the cutter head 17 for movement towards and away from said cutter head in a manner which will hereinafter be more fully described.

Aflange 39 is formed integral with the outer periphery of the annular sup ort member 37 and is adapted to be guide in a suitable guide 40 formed by a shouldered inner portion of the cutter arm support 31 and an annular retaining ring 31a secured to the cutter arm sup ort 31 and abutting the upper side of the ange 39. Thus the cutter arm 14 is so mounted as to be rotatably moved with respect to the annular support member 37 and cutter head 17 about the axis of rotation of the cutter chain sprocket 33.

Referring now in particular to the means wherein the annular sup ort member 37 is carried by the cutter hea 17 for movement towards and away from said cutter head, a pair of

ide members

80, 80 extend outwardly cm the rearward portion of the annular support member 37 and are connected thereto by means of integral supporting ribs 80a, 80a formed integral with the top portion of the annular support member 37 and extending an ularly outwardly and rearwardl from the orward end thereof.

The

dc members

80, 80 are provided with suitable inwardly formed grooves 82, 82, which grooves are adapted to engage

suitable tongues

83, 83 formed integral with and extending outwardly from

guide arms

81, 81. The

guide arms

81, 81 extend from opposite sides of the cutter head 17 and are connected thereto by means of suitable integral supporting ribs 81a, 81a and extend from a position disposed above the axis of rotation of the cutter head 17 to a position below said axis of rotation of said cutter head when said cutter head is ositioned for cutting a horizontal kerf in t e mine wall to permit the cutter arm 14 to be rigidly supported when cutting a kerf adjacent the mme bottom or at various elevations with respect thereto.

The forward portion of the annularsuprt member 37 is supported by the cutter read 17 for movement with respect thereto by means of a screw or threaded shaft 41 disposed forwardly of the splined drive shaft 34 in alignment with said shaft. A head on the outer end of the shaft 41 is shouldered in a recess 51 formed in the surface of the annular support member 37 abutting the cutter arm sup ort 31. The opposite end of the shaft 41 is t readed in a hub of a worm gear 44, which worm gear is supported and journaled in its hub in a suitable bearing sup art 76 formed integral with the cutter head 17 adjacent the forward end thereof.

The

guide members

80, 80,

guide arms

81, 81, and threaded shaft 41 thus afford a sliding support for the annular support member 37 and cutter arm 14 whereby said cutter arm maybe supported for cutting along the mine bottom and may be adjustably moved towards and away from the cutter head 17 for cutting at various elevations with respect to the mine bottom.

A pinion 42 is carried in a suitable recess formed in the annular support member 37 and is keyed on the threaded shaft 41. The pinion 42 meshes with an internal gear 43 formed integral with the inner periphery of the cutter arm support 31, the upper side of which gear is adjacent the lower portion of the guide 40 when the cutter arm 14 is positioned to cut in a hor zontal plane and forms the lower side of said guide.

It may thus be seen that rotation of the threaded shaft 41 will drive the pinion 42, which will in turn pivot the cutter arm 14 about the axis of the splined drive shaft 34 and that when the threaded shaft 41 is moved through the hub of the worm gear 44 in one direction or another that the cutter arm 14 will be moved towards or away from the cutter head 17.

A worm 45 on a shaft 46 extending longitudinally of the cutter head 17 and journaled in said cutter head meshes with and drives the worm gear 44. Suitable clutch jaws 77 are provided on the side of the worm gear 44 opposite the hub portion journaled in the bearing support member 76. The clutch jaws 7 are adapted to be engaged by clutch jaws 78 on a slid ng clutch member 79 feathered on the shaft 41. The sliding clutch member 79 is provided with a hub exten sion 79a slidable in a suitable guide sleeve formed integral with the forward portion of the cutter head 17.

When the clutch jaws 78 are engaged with the clutch jaws 77, the threaded shaft 41 is driven by the worm gear 44 to pivotally move the cutter arm 14 about the axis of the splined shaft 34. On the other hand, when the clutch 'aws 78 are disengaged from theclutch jaws 7, rotation of the worm gear 44 will move the threaded shaft 41 through the hub of said worm gear in an obvious manner and vary the distance of the cutter arm 14 with ]1;t?S]:i6ClZ-7t0 the axis of rotation of the cutter It may thus be seen that a single extensible member has been provided for moving the cutter arm 14 towards and away from the cutter head 17 and for moving said cutter arm about an axis extending perpendicular to the axis of pivotal movement of said outter head, which member is herein shown as being the threaded shaft 41 located midway between the

guide arms

81, 81 and a new and improved means for adjusting the cutter arm 14 in a plurality of parallel planes towards and away from the cutter head 17 and for rotating said cutter arm 14 has been provided which is of a simplified, compact, and eflicient construction.

A suitable locking means is provided for locking the cutter arm 14 in various fixed angular positions with respect to the cutter head 17 for permitting said cutter arm to be disposed to one side or the other of the track and sumped into the coal when in such a. position in a usual manner which comprise a pin 52 slidably mounted in the annular support member 37 (see Fig. 5). The pin 52 is adapted to register with any one of a number of apertures formed in the cutter arm sup port 31. The pin 52 is operated by a suitable hand lever 53 in a usual manner, although said pin may be permitted to operate by its own weight by gravity for automatically locking and holding the cutter arm 14 in the desired position of adjustment.

Referringnow to the drive connections from the motor to the cutter chain drive sprocket 33 and the threaded shaft 41, said motor is provided with a motor shaft 59. A motor pinion 61 is secured to the forward end of the motor shaft 59. The motor pinion 61 meshes with and drives a spur gear 62 on the rearward end of a shaft 63 extending longitudinally through the neck 18 of the cutter head 17. The shaft 63 is sup orted in suitable bearings 68 and 69 forme integral with the neck 18 of the cutter head 17 in a suitable manner, and has a bevel pinion 64 keyed on its forward end which meshes with and drives the bevel gear 65, which bevel gear in turn drives the cutter chain 15 about the cutter arm 14 through the splined shaft 34 and sprocket 33 in a manner which has hereinbefore been described.

A spur gear 72 is freely mounted on the shaft 63 rearwardly of the bearing 69. Suitable clutch means are provided for connecting the spur gear 72 with the shaft 63, which may be of any suitable construction but which are herein shown as being friction clutch means of the cone clutch type. Said clutch means includes an internal 0 utch member 71 formed integral with and extending rearwardly from the spur gear 72, which clutch member is adapted to be engaged by an external clutch member feathered on the shaft 63. The spur ear 72 meshes with and drives an idler gear 3, which idler gear is supported in a U shaped bearin bracket 74 in an ordinary manner. The id er gear 73 meshes with and drives a spur gear 75 keyed on the rearward end of the longitudinally disposed shaft 46. Thus when the clutch member 70 is engaged with the clutch member 71, the shaft 46 will be driven from the motor 60 at a frictionally controlled speed which will pivot the cutter arm 14 about the axis of the splined shaft 34 or adjust said cutter arm with respect to the cutter head 17, depending upon whether or not the clutch jaws 7 8 are engaged with the clutch jaws 77.

Means are provided for supporting the cutting mechanism 11 on the turntable 12 whereby the cutter arm 14 may be an ularly adjusted with respect to the mine ottom about a horizontal axis, which means comprise

studs

88, 88 extending from opposite sides of the housing 20 ad acent its central portion thereof but beneath its longitudinal axis. The

studs

88, 88 are journaled in

suitable trunnion brackets

87, 87 secured to and extendin upwardly and outwardly from the turnta le 12.

The cutting mechanism 11 may be yieldably tilted about the axis of pivotal connection of the

studs

88, 88 to the

trunnion brackets

87, 87 by means of suitable yieldable tilting and support mechanism attached to the turntable 12 and secured to the rearward end of the casing for the motor 60 which includes a frame member 90 secured to said turntable. The frame member 90 is provided with a worm and worm gear housing 91 formed integral therewith, which housing has a transversely extending shaft 92 journaled therein. The transversely extending shaft 92 has a worm 93 secured thereto, which worm meshes with and drives a worm gear 95 keyed adjacent the lower end of a vertically disposed screw shaft 96. The vertically disposed screw shaft 96 is journaled in the worm gear housing 91 and a set nut 97 is threaded on its lower end and abuts the lower portion of said worm and worm gear housing. A nut 98 is threaded on the screw shaft 96 and is provided with a pair of studs 99 trunnioned in a beam member 100 for pivotal movement with respect thereto about an axis extending ongitudinally of the cutting mechanism 11. The beam member 100 is adapted to he slidably supported adjacent its ends in a guide frame member 101 extending rearwardly of the casing for the motor 60 on each side thereof. The beam member 100 is provided with suitable upstanding and depending lugs adjacent its ends on which are positioned compression springs 103, 103 disposed between the lower side of said beam member and an upper portion of the guide frame member 101 on suitable lugs extending upwardly therefrom and compression springs 103, 103 disposed between the top portion of said beam member and suitable lugs depending from retaining

brackets

102, 102 so movement of said beam member along the screw shaft 96 will yieldably move the cutting mechanism 11 about the axis of the

studs

88, 88 in an obvious manner. A suitable means is provided on the shaft 92 for rotating said shaft and movin the beam member 100 along the screw sha t 96, which means may be of any type well known to those skilled in the art but which is herein preferably shown as being a hand wheel 94.

It may thus be seen that the cutter arm 14 may readily be adjusted about the axis of the

studs

88, 88 for cutting at various angular positions with respect to the ground, and that the adjusting means for said cutter arm is yieldable to compensate for irregularities in .he coal seam and minimize the effect of shocks on the cutter arm 14 and the entire mining machine during cutting.

Referring now to the drive for the turntable 12 and means for feeding the cutter arm 14 in an arcuate path across the coal face, said turntable may be rotated to swing said cutter arm in an arc across the front and sides of the main frame or truck 10. Turning of the turntable 12 is independent of operation of the cutting mechanism 11 and said turntable may be turned in any suitable manner but is herein shown as being turned by a motor 104 disposed at the rearward end of the main frame or truck 10. The motor 104 drives a transverse shaft 105 through suitable gear reduction mechanism, generally indicated by reference character 106. A worm 107 on the transverse shaft 105 drives a worm gear 108 on a vertical shaft 109. A spur gear on the lower portion of the vertical shaft 109 is driven by the worm 107 in a suitable manner. The spur gear 110 meshes with and drives a spur gear 111 journaled in the main frame or truck 10 in a usual manner. A spur pinion 112 is coaxial with and driven by the spur gear 111 and meshes with teeth 113 on the outer peri hery of the turntable 12 for rotating sai turntable.

It may be seen from the foregoing description that the cutter arm 14 is provided with a number of distinct and individual movements which are as follows:

First.The entire cutting mechanism 11 may be turned about a vertical axis by means of the turntable 12 for positioning the cutter arm 14 or for feeding said cutter arm along the coal face.

Second.The cutter arm 14 may be swung about an axis coaxial with the cutter chain naen'rie drive shaft 34, for feedin said cutter arm verticall when making a s caring cut in the mine we 1 or for positioning said cutter arm to one side of the truck for cutting a horizontal kerf in the mine wall to either side of the track, locking means being rovided for locking said cutter arm in the esired position of adjustment with respect to the mine wall. Said second mentioned movement of the cutter arm 14 may be utilized for feeding said cutter arm whencutting horizontally if desired but is usually used only for positioning said cutter arm or for feeding said cutter arm vertically when shearin Third-The cutter head 1 and cutter arm 14 may be rotated about an axis extending longitudinally of the cutting mechan:sm 11 for positioning said cutter arm for shearing or cutting in various angular positions wit res ect to the mine wall.

ourth.-The cutter arm 14 may be moved into various lanes of adjustment towards or awa from t c axis of rotation of the cutter hea 17, for adjusting said cutter arm for shearing to either side of said axis of rotation of said cutter head or the main frame or truck 10, and for positioning said cutter arm for cutting at various elevations w.th respect to the minebottom.

Fifth.-The cutter arm 14 may be y1eldably adjusted about an axis extending transversely of the cutting mechanism 11, for adjusting the position of said cutter arm with respect to the mine bottom to permit said cutter arm to out along an irregular mine bottom or in irregular seams of coal.

Machines constructed in accordance with my invention are operated in a usual manner and the operation of the device of m invention should now be clear to those amilar with the art. The machine may be driven from working place to working place on the track wheels 13 driven from the motor 104 at either a high or low speed in a manner well known to those skilled in the art and not herein shown or described in detail snce it is no part of my resent invention. The cutter arm 14 may e fed into the coal face by means of the track wheels 13 driven by the motor 104 or by means of a suitable flexible feeding member havin connection with a suitable winding drum riven from the motor 104 in a usual manner (not shown).

As has before been stated, the cutter arm 14 may be fed across the face of the coal in an arcuate path b means of theturntable 12 or the thread shaft 41, pinion 42, and internal gear or rack 43, and said cutter arm may be fed vertically b means of said threaded shaft, pinion, an internal gear or rack in a manner which has hereinbefore been full described.

It is t us apparent that a new and improved machine of a simplified and compact construction has been provided having many advantages heretofore unknown in the art which is so arranged as to-cut adjacent the mine bottom or at various elevations with respect thereto, and which may also cut shearing or angular kerfs in the mine wall. It may also be seen that the feature whereby the cutter arm 14 ma be adjusted about an axis disposed forwardly of the axis of pivotal movement of the turntable 12 and parallel thereto when said cutter arm is ositioned for cutting a horizontal kerf in e mine wall permits said cutter arm to be readily adjusted for cutting below the level of the track adjacent the mine bottom in front of and to each side of the track and that the device of my invention is thus particularl adapted for cutting in narrow rooms or riving entries. Furthermore, the fact that the device of my invention is so arranged that the cutter arm 14 may be yieldably supported for movement about a transverse axis disposed rearwardly of its rearward end permits said cutter arm to be readily adapted for cutting along irregular mine bottoms or in coal seams havin irregularities therein and said feature mimmizes the effect of the transmission of shocks from said cutter arm to the entire machine.

Although I have herein shown and described one form in which my invention may be embodied, it will be understood that the construction thereof and the arrangement of the various parts may be altered without departing from the spirit and scope thereof.

urthermore, I do not wish to be construed as limitin myself to the specific embodiment illustrated in the drawing excepting as it ma be limited by the appen ed claims.

claim as my invention:

1. In a mining machine, a main frame, cutting mechanism rotatable about a vertical axis on said main frame, said cutting mechanism comprising an auxiliary frame having a cutter head rotatable therein about a horizontal axis, a motor disposed on said frame, driving mechanism disposed in said cutter head and rotatable therewith, said driving mechanism including a lon tudinally extending drive shaft connectet? with said motor, the forward end of said shaft bein provided with a drive connect-ion to a sha t per- .pendicular thereto having a drive sprocket mounted thereon for driving a cutter chain about a cutter arm, meanscarried on said cutter head for rotatin said cutter arm about the axis of rotation o the latter shaft into a pluralit of cutting positions, means coopcrating with said rotating means for var ing the distance between said cutter arm an the axis of rotation of said cutter head, and a longitudinally disposed feed operating shaft extending parallel to and driven from said drive shaft, and having driving connections for either said varying or rotatin means.

. 2. In a mining machine, the com ination of u with said gear to positiv a wheeled frame, a turntable thereon, cutting mechanism on said turntable includin a motor, a cutter head rotatably driven said motor about an axis longitudinal 0 said cutting mechanism, a cutting element disposed forwardly of said cutter head, means carried on said head for rotating said cuttin element about an axis perpendicular to thefion 'tudinal axis of said cutter head, and means or varying the distance between said cuttin element and the central longitudinal axis 0 the aforementioned cutter head comprising a shaft operatively connected to said motor and connecting the cutter head to the cutting element and selective connections between said motor and shaft for translationally moving said shaft with respect to said cutter head for moving said cuttin element toward or away from the longitu inal axis of said cutter head or rotating said shaft for moving said cuttin element about an axis perpendicular to the ongitudinal axis of said cutter head.

8. In a mining machine, a support, a chain ca 'ng cutter arm mounted thereon, a shaft f d r iving said cutter chain about said cutter arm disposed perpendicularly to the longitudinal axis of said support and connecting said support with said cutter arm, means for moving said cutter arm about the axis of said shaft or toward and away from said support comprising a threaded shaft, a gear threaded on said threaded shaft and 1ournaled in said support a pinion keyed on the outer portion of said threaded shaft, an arcuate rack on said cutter arm meshin with said pinion, and clutch means for se ectively connecting said threaded shaft with said first named gear to rotate said second named gear and move said rack and cutter arm about said gear in one 'tion and to release said ar from said threaded shaft in another position to permit said gear to rotate relative to said threaded shaft whereby said cutter arm is moved toward or away from said support.

4. In a mining machine, a motor, a support, a chain ea in cutter arm mounted thereon,

a shaft for rivmg said cutter about said cutter arm chain disposed perpendicularly to the longitudinal axis of said sup ort and connecting said support with said cutter arm, drive connections from said motor to said shaft, and means driven by said cutter chain driving means for moving said cutter arm about the axis of said cutter chain driving shaft, or towards and away from said support including a threaded shaft, a gear threaded on said threaded shaft and journaled in said an port, gearing connections at the opposite en of said threaded shaft havconnection with said cutter arm for swinging the latter about the axis of said cutter chain driving shaft, and clutch means for selectively connectinglsaid threaded shaft y actuate said gearing connections in one gsition and to release and gear from said readed shaft in another position to permit said gear to rotate relative to said screw whereby said cutter arilnt. is moved toward or away from said sup- P 5. In a mining machine, the combination of a wheeled frame, a turntable thereon, a pair of trunnion supports on the forward end of said turntable, cutting mechanism supported on said trunnion supports for movement about a horizontal transverse axis including a motor, a cutter head extending forwardly of said motor a cuttin element proecting forwardly of and 0 et from said cutter head, means carried on said cutter head for rotating said cutting element about an axis perpendicular to the longitudinal axis of said cutter head, means cooperatin with said rotatin means for varying the distance between sai cutting element and the central loggitudinal axis of said cutter head, and y1 dable adjustable supportin means engaging the rearward portion 0 said cutting mechanism for moving said cutting mechanism about its axis of pivotal connection to said trunnion supports.

6. In a mining machine, the combination of a wheeled frame, a turntable thereon, a pair of trunnion supports on the forward end of said turntable, cutting mechanism supported on said trunnion supports for movement about a horizontal transverse axis including a motor, a cutter head disposed forwardly of said'motor for rotation about an axis extending longitudinally of said cutting mechanism, a cutting element projectin forwardly of and ofiset from said cutter ead, means carried on said cutter head for rotating said cuttin element about an axis rpendicular to t e longitudinal axis of sai cutter head, means cooper-a with said rotatin means for varying the istance between sai cuttin element and the central lon 'tudinal axis of said cutter head, and yieldab e adjustable supporting means engagin the rearward portion'o said cutting mec anism for movin said cutting mechanism about its axis 0 pivotal connection to said trunnion supports.

In a mining machine the combination of a wheeled frame, a turntable thereon, cutting mechanism on said turntable including a motor, a cutter head projecting be ond the limits of said turntable, a pair 0 arallel spaced guides extending from sai cutter head, a cutting element engageable with and movable in said guides towards and awe from said cutter head in a plurality of para lel lanes, said cutting element having a cutter ar pivotally mounted thereon to swin about an axis peizpendicular to the planes 0 movement of sai cutting element with res ct to said cutter head, a cutter chain mova le about said cutter bar, means for driving said cutter chain from said motor comprisin a shaft coaxial with the pivotal axis of sai cutter bar with respect to said cutting element and forwardly of said guides, and means for movin said cutting element towards and away rom said cutter head comprising a single threaded member on a line midway between said (guides and forwardly of said aforementione shaft.

8. In a mining machine, a motor, a support, a cutter arm having a cutter chain movable thereabout, a shaft for driving said cutter chain from said motor interposed between said support and cutter arm dperpendicular to the longitudinal axis of sai support, and means operable independently of said cutter chain drive shaft for moving said cutter arm towards and away from said sup ort or about the axis of said cutter chain riving shaft comprising a screw shaft extending between said support and said cutter arm, a gear coaxial with said screw shaft and having driven connection with said motor, and means for selectively connecting said gear with said screw shaft for rotating said screw shaft or moving said screw shaft translationally with respect to said gear comprising a clutch interposed between said shaft and gear.

9. In a mining machine, a motor, a support, a cutter arm having a cutter chain movable thereabout, a shaft for driving said outter chain from said motor interposed between said support and cutter arm perpendicular to the longitudinal axis of said support, and means driven by said motor independently of said cutter chain drive shaft for moving said cutter arm towards and away from said su port or about the axis of said cutter chain driving shaft com rising a gear held in said support for rotata le movement with respect thereto, a screw shaft supported by said gear and extending between said support and cutter arm, means for selectively connecting said screw shaft with said gear for rotating said screw shaft or moving said screw shaft translationally with respect to said gear, means for connecting said screw shaft with said cutter arm for moving said cutter arm with said threaded shaft upon translational movement thereof and means fixed to the lower end of said screw shaft for rotating said cutter arm about the axis of cutter chain driving shaft upon rotation thereof.

10. In a mining machine, a motor, a support, a cutter arm having a cutter chain movable thereabout, a shaft for driving said cutter chain from said motor interposed between said support and cutter arm perpendicular to the longitudinal axis of said support, and means driven by said motor for moving said cutter arm towards and away from said suport or about the axis of said cutter chain driving shaft comprising a gear held in said supportfor rotate le movement with respect thereto, a screw shaft supported by said gear and extending between said support and cutter arm means for selectively connecting said screw s aft with said gear for rotating said screw shaft or moving said screw shaft translationally with respect to said gear, means for connecting the opposite end of said screw shaft with said cutter arm for moving said cutter arm with said screw shaft upon translational movement thereof and means for rotating said cutter arm about the axis of said cutter chain driving shaft comprising a spur gear fixed to said screw shaft adjacent the end opposite said first mentioned gear and having direct connection with gear teeth secured to said cutter arm.

11. In a mining machine, a motor, a support, a cutter arm having a cutter chain movable thereabout, a shaft for driving said cutter chain from said motor interposed between said support and cutter arm perpendicular to the longitudinal axis of said support, and means driven by said motor for moving said cutter arm towards and away from said support or about the axis of said cutter chain driving shaft comprising a gear held in said support for rotatable movement with respect thereto, a screw shaft supported by said gear and extending between said support and cutter arm, means for selectively connecting said screw shaft with said gear for rotating said screw shaft or moving said screw shaft translationally with respect to said gear, means for connecting said screw shaft with said cutter arm for moving said cutter arm with said screw shaft upon translational movement thereof and means for rotating said cutter arm about the axis of said cutter chain driving shaft comprising a rack having connection with said cutter arm and a spur gear fixed to said screw shaft adjacent the end opposite said first mentioned gear having its teeth engageable with the teeth of said rack.

12. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a cutting element offset from said cutter head movable towards and away from said cutter head including a projecting cutter arm having a cutter chain movable thereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head, and extensible means disposed forwardly of said cutter chain drive means for moving said cutting element towards and away from said cutter head.

13. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a cuttin element offset from said cutter head movab e towards and away from said cutter head including a projecting cutter arm having a cutter chain movable thereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head, and means disposed forwardly of said cutter chain drive means for moving said cutting element towards and away from said cutter head comprising a single threaded member on the longitudinal center line of said cutter head having connection with said cutter head and cutting element.

14. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a cutting element offset from said cutter head movable towards and away from said cutter head including a projecting cutter arm having a cutter chain movable thereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head, and extensible means driven by said motor disposed forwardly of said cutter chain drive means for moving said cutting element towards and away from said cutter head.

15. In a m ning machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a cutting element offset from said cutter head movable towards and away from said cutter head including a projecting cutter arm having a cutter chain movable thereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head, and means driven by said motor disposed forwardly of said cutter chain drive means for moving said cutting element towards and away from said cutter head comprising a single threaded member on the longitudinal center line of said cutter head having connection with said cutter head and cutting element.

16. In a min ng machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a plurality of parallel spaced guides extending from said cutter head, a cutting element offset from said cutter head and movable towards and away from said cutter head in said parallel spaced guides including a projectin cutter arm having a cutter chain movable t ereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head and extensible means disposed forwardly of said drive means for movin said cutting element towards and away rom said cutter head.

17. In a minin machine, the combination of a wheeled rams, cuttin mechanism on said wheeled frame including a motor havin a cutter head extending forwardly there rom beyond the forward limits of said wheeled frame, a plurality of parallel spaced guides extending from said cutter head, a cutting element offset from said cutter head and movable towards and away from said cutter head in said parallel spaced ides including a projecting cutter arm aving a cutter chain movable thereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head and means disposed forwardly of said drive means for movin said cutting element towards and awe rom said cutter head comprising a singe threaded member on the longitudinal center line of said cutter head having connection with said cutter head and cutting element.

18. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a plurality of parallel spaced guides extending from said cutter head, a. cutting element offset from said cutter head and movable towards and away from said cutter head in said parallel spaced guides including a projecting cutter arm having a cutter chain movable thereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head and extensible means driven by said motor disposed forwardly of said cutter chain drive means for moving said cutting element towards and away from said cutter head.

19. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a plurality of parallel spaced guides extending from said cutter head, a cutting element offset from said cutter head and movable towards and away from said cutter head in said parallel spaced guides including a projecting cutter arm having a cutter chain movable thereabout, drive means of a wheeled frame, cutting mechanism thereconnecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with res ect to said cutter head and means driven y said motor disposed forwardly of said cutter chain drive means for moving said cutting element towards and awa from said cutter head comprising a sin'g e threaded member on the longitudinal center line of said cutter head having connection with said cutter head and cutting element.

20. In a mining machine, the combination of a wheeled frame, cutting mechanism thereon including a motor, a cutter head forwardly of said motor extending beyond the boundaries of said wheeled frame, a cutting element havin a projecting cutter arm extending forwar ly therefrom movable towards and away from said cutter head, a cutter chain sprocket, a cutter chain driven by said sprocket about said cutter arm. a drive connection from said motor to said cutter chain is rocket including a shaft perpendicular to t e lon itudinal axis of said cutter head, means isposed forwardly of said shaft for movin said cuttin element and cutter arm towar s and away rom said cutter head including a threaded shaft, and a drive connection from said motor to said threaded shaft for moving said shaft with respect to said outter head comprising a worm gear operatively connected with said threaded shaft, a worm meshing with said worm gear, and a shaft extending longitudinally rearwardly of said worm gear having operative connection with said worm and having selective connection with said motor.

21. In a mining machine, the combination on including a motor, a cutter head forwardly of said motor extending beyond the boundaries of said wheeled frame, a cutting element having a projecting cutter arm extending forwardly therefrom movable towards and away from said cutter head, a cutter chain sprocket, a cutter chain on said cutter arm driven by said cutter chain sprocket, a drive connection from said motor to said cutter chain sprocket comprising a shaft extending longitudinally of said cutter head driven by said motor, a bevel gear driven by said shaft and a shaft having slidable connection with said bevel gear and driven thereby, and means disposed forwardly of said shaft for moving said cutting element and cutter arm towards and away from said cutter head including a threaded shaft interposed between said cutting element and cutter head and having selective connection with said motor.

22. In a mining machine, the combination of a wheeled frame, cutting mechanism thereon including a motor, a cutter head forwardly of said motor extending beyond the boundaries of said wheeled frame, a cutting element having a projecting cutter arm extendin forwardly therefrom movable towards an away from said cutter head, a cutter chain sprocket, a cutter chain driven by said sprocket about said cutter arm, a drive connection from said motor to said cutter chain sprocket comprising a shaft extending longitudinally of said cutter head driven by said motor, a bevel gear driven by said shaft and a shaft having slidable connection with said bevel gear and driven thereby and means disposed forwardly of said shaft for moving said cutting element and cutter arm towards and away from said cutter head including a threaded shaft interposed between said cutting element and cutter head and having selective connection with said shaft extending longitudinally of said cutter head.

23. In a mining machine, the combination of a wheeled frame, cutting mechanism thereon including a motor, a cutter head disposed forwardly of said motor extending eyond the boundaries of said wheeled frame, a cutting element having a projecting cutter arm extending forwardly therefrom movable towards and away from said cutter head, a cutter chain sprocket, a cutter chain driven about said cutter arm by said sprocket, a drive connection from said motor to said cutter chain sprocket comprising a shaft extending longitudinally of said cu-tter head and driven by said motor, a bevel gear driven by said shaft and a shaft having slidable connection with said bevel gear and driven thereby, means disposed forwardly of said last named shaft for moving said cutting element and cutter arm towards and away from said cutter head including a threaded shaft interposed between said cutting element and cutter head and a drive connection from said motor to said threaded shaft for moving said threaded shaft with respect to said cutter head comprising a worm gear having operative connection with said threaded shaft, a shaft extending parallel to said first mentioned longitudinally extending shaft, a worm on said shaft meshing with said worm gear and selective drive connections between said longitudinally extending parallel shafts.

24. In a mining machine, the combination of a wheeled frame, a turntable thereon, a pair of trunnion supports on said turntable, cutting mechanism supported on said trunnion supports for movement about a horizontal transverse axis including a cutter head extending forwardly of said turntable, a projecting cutter arm supported by said cutter head for cutting adjacent the mine bottom in front of and to each side of said wheeled frame and for adjustment towards and away from said cutter head, and yieldable adjustable supporting means engaging the rearward portion of said cutting mechanism for moving said cutting mechanism about the axis of said trunnion supports and adjusting the angular position of said cutter arm with respect to the mine bottom comprising a vertically movable member and yieldable compression means interposed between said vertically movable member and said cutting mechanism.

25. In a mining machine, the combination of a wheeled frame, a turntable thereon, a pair of trunnion supports on said turntable, cutting mechanism supported on said trunnion supports for movement about a horizontal transverse axis including a cutter head extending forwardly of said turntable, a proiecting cutter arm supported by said cutter head for cutting adjacent the mine bottom in front of and to each side of said wheeled frame and for adjustment towards and away from said cutter head. and yieldable adjustable supporting means engaging the rearward portion of said cutting mechanism for moving said cutting mechanism about the axis of said trunnion supports and adjusting the angular position of said cutter arm with respect to the mine bottom com rising a frame member extending rearward y of said cutting mechanism, a vertically movable adjusting member supported on said turntable, and vieldable compression members internosed between said vertically movable adjusting member and frame member.

26. In a mining machine, the combination of a wheeled frame, a turntable thereon. a pair of trunnion supports on said turntable, cutting mechanism supported on said trunnion supports for movement about a horizontal transverse axis including a cutter head extending forwardly of said turntable, a projecting cutter arm supported by said cutter head for cutting adjacent the mine bottom in front of and to each side of said wheeled frame and for adjustment towards and away from said cutter head, and yield able adjustable supporting means engaging the rearward portion of said cutting mechanism for moving said cutting mechanism about the axis of said trunnion supports and adjusting the angular position of said out ter arm with respect to the mine bottom comprising a frame member extending rearwardly of said cutting mechanism, an adjusting member guided in said frame member, yieldable compression means interposed between said adjusting member and frame member, and means supported on said turntable for vertically moving said adjusting member.

27. In a mining machine, the combination of a wheeled frame, a turntable thereon, a pair of trunnion supports on said turntable, cutting mechanism supported on said trun nion supports for movement about a horizontal transverse axis including a cutter head extending forwardly of said turntable, a pro- 'ecting cutter arm supported by said cutter ead for cutting adjacent the mine bottom in front of and to each side of said wheeled frame and for ad'ustment towards and away from said cutter ead, and yieldable adjustable supporting means engaging the rearward ortion of said cutting mechanism for movmg said cutting mechanism about the axis of said trunnion supports and adjustin the angular position of said cutter arm wit respect to the mine bottom comprising a frame member extending rearwardly of said cutting mechanism, an adjusting member guided in said frame member, yieldable com ression means interposed between said a justing member and frame member, and means supported on said turntable for vertically mov mg said adjusting member comprising a thriaded member having engagement therewit 28. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame includ' a motor having a cutter head extending lgirwardly therefrom beyond the forward limits of said wheeled frame, a cutting element oifset from said cutter head and movable towards and away from said cutter head including a projectin cutter arm having a cutter cham movable t ereabout, drive means connecting said cutter head with said cutting element for driving said cutter chain from said motor in all positions of said cutting element with respect to said cutter head, means for guidin and moving said cutting element towards and away from saidcutter head comprisin an extensible member disposed forwardly of said cutter chain drive means, a pair of parallel disposed guide members extendin from opslte sides of said cutter head t 0 distance tween the outer sides of said guide members being substantially greater than the width of said cutter head and said guide members being so arranged as to extend in opposite directions from the longitudinal center line of said cutter head in a plane perpendicular to the longitudinal center line of said cutter head and a air of parallel di grooved guide mem rs extending from and aving connection with said cutting element, said grooved ide members having slidable engagement with said guide members on said cutter head and the total width thereof being greater than the distance between the outer of said guide members on said cutter e 29. In a mining machine, the combination of a wheeled frame, cutting mechanism on said wheeled frame including a motor having a cutter head extending forwardly therefrom beyond the forward limits of said wheeled frame, a cutting element offset from said outter head movable towards and away from said cutter head including a projecting cutter arm having a cutter chain movable thereabout, drive means connectin said cutter head with said cutting element or driving said cutter III chain from said motor in all positions of said cutting element with respect to said cutter head, means for guiding and moving said cutting element towards and away from said cutter head comprising an extensible member disposed forwardly of said cutter chain drive means, parallel disposed guide members extending from opposite sides of said cutter head, the distance between the outer sides of said uide members being substantially greater t an the width of said cutter head and said guide members being so arranged as to extend in opposite directions from the longitudinal center line of said cutter head, and a pair of parallel spaced guide members extending from and havin connection with said cutting element, sai last mentioned guide members having inwardly facin grooves enga eable with the outer sides an ends of said rst mentioned guide members. Si ed at Chicago in the county of Cook and tate of Illinois, this 23rd day of December, A. D. 1926.

WILLIAM T. MGCULLOUGH.

CERTIFICATE OF CORRECTION.

Patent No. 1,891,719.

WILLIAM T. McCULLOUGH.

December 20, 1932.

it is hereby certified that error appears in the printed specification or the above numbered patent requiring correction as follows:

4, strike out the word "chain" and insert the same after "cutter" and that the said Letters Patent should be read with this correction that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of February, A. D. 1933.

M. J. Moore. (Seal) Page 6, line 49, claim in line 48;

therein Acting Commissioner of Patents.

chain from said motor in all positions of said cutting element with respect to said cutter head, means for guiding and moving said cutting element towards and away from said cutter head comprising an extensible member disposed forwardly of said cutter chain drive means, parallel disposed guide members extending from opposite sides of said cutter head, the distance between the outer sides of said uide members being substantially greater t an the width of said cutter head and said guide members being so arranged as to extend in opposite directions from the longitudinal center line of said cutter head, and a pair of parallel spaced guide members extending from and havin connection with said cutting element, sai last mentioned guide members having inwardly facin grooves enga eable with the outer sides an ends of said rst mentioned guide members. Si ed at Chicago in the county of Cook and tate of Illinois, this 23rd day of December, A. D. 1926.

WILLIAM T. MGCULLOUGH.

CERTIFICATE OF CORRECTION.

Patent No. 1,891,719.

WILLIAM T. McCULLOUGH.

December 20, 1932.

Signed and sealed this 28th day of February, A. D. 1933.

M. J. Moore. (Seal) Page 6, line 49, claim in line 48;

therein Acting Commissioner of Patents.