US1979266A

US1979266A - Mining machine

Info

Publication number: US1979266A
Application number: US573149A
Authority: US
Inventors: Morris P Holmes
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1922-07-06
Filing date: 1922-07-06
Publication date: 1934-11-06
Anticipated expiration: 1951-11-06

Description

NOW-6, 1934. M P HOLMES 1,979,266

MINING MACHINE Original Filed July 6. 1922 8 Sheets-Sheet l M. P. HOLMES MINING MACHINE:

Nov. 6, 1934.

Original Filed July 6. 1922 8 Sheets-Sheet 2 Q @m QN M. P. HQLMES Nov. 6, 1934.

MINING MACHINE 8 Sheets-Sheet 3 Original Filed July 6. 1922 MINING MACHINE Original Filed July 6. 1922 8 SheeJcS-Shee'I 4 Nov. 6, 1934.

M. P. HOLMES MINING MACHINE original Filed July 6. 1922 8 sheets-sheet 5 772 ffy M. P. HOLMES MINING MACHINE Nov. 6, 1934.

8 Sheets-Sheet 6 Original Filed July 6. 1922 IE5/g. 14.

"limits of the machine.

Patented Nov. 6, 1934 l UNITED STA MINING MACHINE Morris P. Holmes, Claremont, N. H., assignor to Sullivan Machinery Company, a corporation of Massachusetts Application July 6, 1922, Serial No. 573,149 Renewed November 29, 1930 152 claims. (c1. sez- 28) My invention relates to mining machines.

An object of my invention is to provide an improved mining machine. Another object of my invention is to provide an improved mining machine having improved propulsion mechanism. A further object of my invention is to provide an improved mining machine having mechanism. A still further object of my invention is to provide an improved mining machine having cutting mechanism mounted in an improved manner whereby the same may be adjusted to insert a kerf in practically any plane in advance of the machinewithin the operating Other objects and advantages of my invention will hereinafter more fully appear.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may `assume in practice.

In these drawings,-

Fig. 1 is a side elevation of a mining machine 'constructed in accordance with the illustrative form of my invention, the bar being partially broken away and shown in undercutting position.

Fig. 2 is a plan view or such a machine.

Fig. 3 is a sectional View, partially in elevation, on the broken section line 3--3 of Fig. 4, the bar being shown in shearing position.

Fig. 3a is a detail `View showing a portion of the control mechanism. Y

, Fig. 4 is a vertical section, partially in elevation, on the broken section line 4-4 of Fig. 3, the bar being shown in shearing position.

Fig. 4a is a detail showing an interlock for the controls.

Fig. 5 is a horizontal section on the line 5-5 of Fig. 4. v

Fig. 6 is a vertical section on the section line 6--6 of Fig. 3.

Fig. 7 is a vertical section on the section line 7 7 of Fig. 4;

Fig. 8 is a detail showing locking mechanism.

Fig. 9 is a section on the broken line 9-9 of Fig. 8.

Fig. 10 is a View, partially in elevation and partially in section on an enlarged scale, of truck frame tilting means of an improved construction employed in the illustrative form of my invention.

Fig. 11 is a vertical section on the broken section line 11-11 of Fig. 10.

Fig.V 12 vis a vertical section on the line 12-12 of Fig. 2.

improved adjusting means for the cutting Fig. 13 is a vertical section on the section line 13-13 of Figs. 1 and 4.

Fig. 14 is a vertical section on the section line 14-14 of Fig. 2.

Fig. 15 is a diagrammatic View showing va- 60 lrious positions in which the cutter bar may be disposed.

Figs. 16, 17, 18, 19, 20 and 21 are various simplified views showing different cuts by the machine.

Referring first to Figures l and 2, the apparatus as a whole comprises a truck consisting of a truck body 1 mounted on wheels 2 and adapted to run upon a track 3 upon which truck is mounted a mining mechanism generally designated M, and including a motor casing 4, a gear housing 5, a cutter `bar 6 and supporting `and adjusting mechanism for the cutter bar generally designated 7, which mechanism I shall hereafter more fully describe. d For the purpose of permitting a moderate angular adjustment of the mining machine M as a Whole about a transverse horizontal axis, there is provided the following mechanism: Secured to angle irons 8 forming the upper lateral portions of the truck body 1 are circular members 9 bolted as at 10 to the members 8 and forming pivots about which the mining machine is tiltable. It will be noted that these members are located about midway between the axles of the truck. The machine frame is provided at its opposite sides with projecting bearing members 12 bolted as at 13 to the sides of the macasing 5, which members l2 have curved bear- 0 ing surfaces 14 which pivotally support the mining machine as a whole upon the members 9. It will also be observed that the members 12 are arranged about at the center of mass of the tilting machine frame, and accordingly that no great amount of force is necessary to enable the tilting of the machine about its pivot. For the purpose of effecting this tilting, there is disposed upon the truck frame 1, in suitable journals 15, a transverse rock shaft 16 to which at opposite sides of the center thereof but closely adjacent to each other there are secured a pair of similar arms 17 which are connected at their free ends by a bolt 18 upon which there are rotatably mounted in a suitable manner rollers 19. These rollers are arranged in guideways 20 which are secured to the bottom of the machine lM itself. It will be observed from Fig. 10 that when the machine frame is in a hori- 1 Zontal position, the arms 17 are not vertical and so that upon swinging of the shaft 16 and resultant swinging of the arms 17, the rollers 19 traveling within the slots 20 will cause a tilting movement of the machine frame as a whole. This tilting may be in either direction about the transverse pivot. In order to lock the shaft 16, an arm 21` is secured' by keying or any other suitable manner to one end thereof and with this arm there cooperates arm` swingingmeans comprising an arm engaging member 22,

which is threaded throughout a considerable portion of its length as indicated at 23, supported in suitable horizontal guides 24 and moved longitudinally upon rotation `of the nut 25 engaging the threaded portion 23, which nut may be rotated upon the member 23 by a hand operated. ratchet and pawl mechanism 26. It

will be observed that, depending upon the di- Within the motor casing 4, there is arranged a motor (not shown) supplied with current through a usual reeling device 4 described in a previously filed application, the motor herein being reversible and provided with suitable controlling and reversing mechanism of any suitable or usual construction. The motor comprises an armature shaft which projects through opposite ends of the motor casing 4 and operates to supply power for the driving of the cutting mechanism, the shifting thereof, and the feeding movements of the machinev as a whole both during cutting and in running around the mine. The rear end of the armature shaft which is designated 31 carries thereon a spur pinion 32 which meshes with a spur gear 33 keyed or otherwise suitably secured to a horizontal longitudinally extending shaft 34 upon which a worm 35 is arranged. The worm meshes with a worm wheel 36 mounted upon a transverse hollow shaft 37 and by means of a suitable friction control 38, which is of a well known construction, a driving sprocket 39 whose position is shown in Figs. l and 2 may be reversibly driven, depending upon the direction of rotation of the shaft 30; or at the will of an operator upon suitable manipulation of the friction mechanism 38 be permitted to rotate when disconnected from the shaft 37. vAt its opposite end, the armature shaft 30 is extended, as later described, and carries near the motor casing 4 a spur pinion 40 which meshes with and drives a spur gear 4l arranged upon a horizontal longitudinally disposed shaft 42, supported in suitable bearings 43 within the gear housingy 5. At its forward end, the shaft 42 carries a bevel pinion 44 which is disposed between and drives a pair` of bevel gears 46 and 47. The latter are connectable by friction clutch mechanisms of a well known form, and which are generally designated 48 and 49, alternately with a transverse horizontal shaft 50. A suit- `able shipper mechanism 5l carried by ahollow `horizontal transverse sleeve 52 is normally held in neutral position by oppositely acting springs 53 arranged between adjustable collars 54 and `the frame of the mining machine.

collars 55 engaging the ends of the sleeve 52. Within the sleeve 52 is a shaft 56 having shoulders 57 adapted to engage the collars 55 and to free the sleeve of the influence of one or the other of the springs 53. The shaft 56 is movable by the coaction of a rack 58 and gear segment 59 in a manner to effect control of the clutches 48 and 49 and so the alternate connection or the complete disconnection of the gears 46 and 47 from the shaft 50. The segment 59- is controlled by a hand lever 60 upon the top ofthe gear housing 5, which lever has a neutral and two operating positions in which it may be llocked by any suitable means. It will be observed that the loading of the friction clutches is by the springs 53 and these may be adjusted to cause slipping of the frictions at any desired load, so as to prevent overloading the motor. The shaft 50 is provided with a worm 61 which meshes with a worm wheel 6l upon a collar 62 which is keyed to ahorizontal longitudinally extending shaft 63 arranged below and to one side of the shaft 42. It will therefore be obvious that reverse rotation of the shaft 63 is effected by reverse rotation of the bearings 64and 65 formed in the gear casing 5 and the shaft carries adjacent the former of these bearings and to the rear of the worm wheel 61', a worm 67 which meshes with and `drives a worm wheel 68 rotatably mounted on` a transverse horizontal shaft 69 journaled as at 76 in the gear; casing 5. The shaft 69 has keyed thereto a sleeve 7l upon which spur teeth 72 are formed. A similar spur gear 73 is operatively connected to the worm gear 68 and a sliding clutch sleeve 74 movable by a shipper 75 is adapted to connect the pinion`72 with the pinion 73 for simultaneous rotation, and so driving of the shaft 69 may be effected. The shaft 69 has a portion 76 Vprojecting through the side wall of the gear casing 5 and carries keyed thereon a driving sprocket 77. The clutch shipper 75 is arranged upon a shaft 78 which projects through thetop of the gear casing and is operable by a handle 79 which may be locked in its operating positions by any suitable means.

77' and 39 are to be found. Thel forward axle 89 has secured thereto a sprocket wheel 83, and a chain 84, cooperating with the sprockets 82 and 83, connects the axles for simultaneous rotation in theY same direction. A driving chain 85 passes,y as best shown by dotted chain lines j shaft 50. The shaft 63 is supported in suitable i in Fig. l, around the sprockets 39 rand 77 and around the sprocket 81 upon the rear axle 80, it being also observed from Fig. l that the chain passes -around a further sprocket 86 which, as

vbest shown in Fig. 12, is adjustable in position to vary the tension ofthe chain. The adjusting mechanism for the sprocket 86 is as follows: The sprocket 86 is mounted upon a shouldered sleeve 87 which cooperates with a circular member 88 having a flange 39 in clampa stationary circular seat 90 carried upon A stud 91 is threaded into the member 88 and a nut 92 is adapted to connect rigidly a chain guard 93, the member 37, the

members

88 and 90 in ing such `manner as `to hold the sprocket in any desired position. As' 'it will be noted that the portion ofv the member 87 about which the sprocket `96 is rotatable is not concentric with the portion of the member 87 which is rotatable in the journal on the main frame,Y it will be evident that the member 87 may so move as to provide more slack or to tighten the chain 85 and then securely hold it in desired position. A similarly adjustable sprocket 94 is arranged between the truck wheels 2 and serves both as a means for additional chain tightening and to keep the chain olf the track.

Having described thus far the mechanism which is used for eifecting translational movements of the machine, 1 will describe its operation. It will be evident that during running around the mine it is immaterial so far as this i operation is concerned whether the cutter chain runs at all or what direction it runs in, although it is preferable that it does not run at all, as is thecase herein. It is accordingly possible to reverse the motor and so to reverse the direction of rotation of the armature shaft without in any way interfering with the operation of the mechanism. Accordingly, the friction clutch mechanism 38 will suffice to control the connection of the rear end of the armature shaft 31 by way of the pinion 32, gear 33, worm 35,

. worm wheel 36, and shaft 37 with the driving sprocket 39 and so effect the running of the machine at a relatively high rate of speed about the mine. When it is desired to cut and feed the'machine during cutting, it is obvious that unless the cutter bits are to be shifted the motor must run in one direction. Accordingly, it must be possible, if sumping and withdrawing cuts are to be used, to reverse the direction of movement of the machine without reversing the motor. For this reason 1 have provided the reversible driving mechanism including the clutches 48 and 49, etc. and so am able to reverse the direction of rotation of the driving sprocket 77 at will while maintaining the direction of rotation of the armature shaft 30 unchanged. Let it be assumed that it is desired to effect bodily movement of the machine in one direction, then to maintain it stationary, and then to move it bodily in the opposite direction. Under these circumstances, whichever one of the friction clutches 48 or 49 as should be operated to effect the proper drive of the sprocket 77 for forward feed will be engaged. Thereupon the shaft 50 will rotate the wor 61, the latter will drive the worm wheel 61', the shaft 63, the worm 67 and the worm wheel 68, and, if the clutch member 74 is in proper position to connect the gears 72 and 73, the shaft 69 will be rotated and so the sprocket 77 will be rotated to effect forward feed. 1t

A will be evident, by reason of the presence of the several worms and other reducing elements in this train, that the speed during cutting will be much less than that during running around the mine, and it will be obvious that during the rotation of the sprocket 77 by power, the friction clutch 38 will be so operated as to allow the idle rotation of the sprocket 39. When the machine has been fed in a forward direction as far as desired, the handle will be swung in such way as to cause disconnection of both the friction clutches 48 and 49 and the machine will be then locked in its position upon the track as the worms will prevent rotation of the truck axles. All that is necessary to effect retraction of the machine is to throw in the other of the clutch members 48 and 49 and the machine will then be retracted in the desired manner. During running around the mine, it will be evident that by placing the clutch shipper 51 in mid-position, the mechanism for driving the shaft 69 may be rendered inoperative, but it will be necessary on account of the presence of the worms to throw the clutch member 74 to a position to disconnect the spur teeth 'l2 and 73, and then the shaft 69 and sprocket 77 will be rotated idly during the movement of the machine about the mine.

It will be observed that the armature shaft 30 at its forward end extends completely across the full length of the gear housing 5 and is journaled in the front end of that housing in a bearing member 95 in which suitable antifriction bearing means 95' are arranged. The extreme forward end of the shaft 30 carries suitably keyed, or otherwise held thereon, a spur driving pinion 96 whose connections with other portions of the mechanism will be hereinafter described. The front end of the gear casing 5 herein also terminates in a flange 100 to which there is secured by bolts 101 a collar member 102 having an inwardly directed rim 103 at the forward side thereof. The rim 103 constitutes retaining means for an annular internal gear member 104 which is journaled in the member 1.02 and to a flange 105 on which there is bolted as at 106 a member 107 which may be referred to as a neck or turret member. The member 107 has an annular recess 108 formed therein overlying the flange or rim 103. The member 107 at a point spaced longitudinally of the machine from the portion thereof which is bolted to the internal gear 104 and in eccentric relation to the latter is provided with a circumferential rim or flange 109 to which an internal gear member 110 is bolted as at 111. This internal gear member partially overlies an annular groove 112 in the flange 109 and thereby serves to lock in position a sleevelike member 113 which has a rim or flange 114 inwardly directed and disposed in the recess 112. To the member 113 is bolted as at 115 a second turret member 116 which supports the cutter mechanism and forms a casing for the bar swinging and cutter chain driving mechanism. It will be observed that the turret member 107 is rotatable upon rotation of the internal gear 104 about a longitudinally extending horizontal aXis which coincides with the axis of the armature shaft 30, while it will be observed from Fig. 3 that the turret member 116, while rotatable about a horizontal axis, is not rotatable about an axis coincident with the axis of the armature shaft 30, but about a parallel axis oifset therefrom a material distance.

Extending midway between the sides of the turret member 116 and journaled in suitable bearings 117 is a shaft 118 about whose axis the turret member 116 is rotatable. The shaft 118 carries suitably secured to the rear end thereof a spur gear 119 which is constantly in mesh with the spur gear 96 and which is driven thereby. At its forward end the shaft 118 carries a beveled pinion 120. This pinion meshes with a beveled gear 121 which is secured to a sleeve 122 within which a shaft member 123 is arranged, this shaft member being provided between its ends with a spur gear 124 and at its top having fixed thereto in any suitable manner a cutter chain driving sprocket 125. The shaft ber 127 secured to 123 at its lower end is journaled in a suitable bearing 126 lwhich is supported in a plate memvthe lower side ofthe sleeve 122. The member 127 is journaled in turn in a bearing 128 suitably supported in a web 129 forming a portion of the turret 116. Arranged coaXially with the shaft 123 is a beveled driving pinion 130 which is held in constant driving relationship with the `gear 121 by an interlock--` ing connection 131 through the intermediation of the sleeve 122 and plate member 127.

Upon one side of the turret member 116 there is arranged what might be termed a third turret member 135 to which the cutter bar 136 carrying the cutter chain 136' is secured by bolts 137. lThe turret member 135 is bolted as at 138 to a large internal gear 139 which is journaled in a sleeve-like flange member 140 bolted as at 141 to the front of the turret member 116 and provided with an inwardly directed flange 142 to hold the internal gear member 139 in place. It will be observed that the turret member 135 is traversed by an opening 143 in which suitable roller bearings or other antifriction means 144 are interposed between the member 135 and the shaft 123. The turret castings 116 have a flange 146 which supports the gear 139 at the side opposite the flange on the member 140. At this point, it may be noted that in the form of my invention shown herein the turret member 116 is made in two lateral halves for purposes of convenience of casting or assembly, but this particular type of construction is obviously not essential.

Disposed on opposite sides of the driving pinion 130 are a pair of bevel gears 150 and 151 which may be connected by suitable friction clutch mechanisms 150 and 151 of any well known type, herein of the multiple disc type, in driving relation with members 152 and 153 secured to a shaft 154 extending across the turret 116 perpendicularly to the direction of the shaft 123. The controlling mechanism for these clutches is identical in principle and mode of operation with that for the clutches 48 and 49, the similar parts being designated by primed numbers. The shaft 154 is journaled at its opposite ends in suitable anti-friction bearings 155 carried on the turret member 116 and has keyed to it adjacent the opposite ends thereof, a pair' of worms 156 and 157. These worms mesh respectively with worm wheels 158 and 159. The latter are rotatable on axes parallel to the axis of the shaft 123. The axes of rotation of the gears 158 and 159 lie in a vertical plane transverse to the longitudinal axis of the armature shaft. As in their general construction the mountings for the gears 158 and 159 are similar, with the exception of the fact that the gear 159 has additional connections not present in the case of the gear 158, it will be suiiicient todescribe the arrangement of the gear 159. This gear is journaled in a bearing 160 in the side of the turret 116 opposite the cutter bar, the gear beingY secured in any suitable way, (herein bolted on) to the hollow shaft 161 which is journaled in the bearing 160. At its upper end the hollow shaft 161 is connected to a sleeve 162 whose periphery is provided with gear teeth 163 upon which is slidable a toothed clutch member 164.

Coaxial with the sleeve 161 is a shaft 165 which the shaft 1,65 is provided with a toothed portion 168 which may be connected with the teeth 163 bythe clutch element 164. It will thus be evident that by properly vshifting the clutch member 164, the worm wheel 159 may be connected with the gear 168. It will be observed thatthe teeth'of, the member 168 are relatively long and this constructionis employed in view of the fact that the member 168 is in constant mesh with a gear 170 keyed to a hollow shaft 171 and journaled in anti-friction bearings 172 on an axis parallelto the Vaxes of rotation of the worm wheels 158 and 159 and herein equi-distant from said axes. The connection for and mounting of the wheel 158 is substantially identical with the details of the mounting for the wheel 159 as so far described and by operating a clutch member corresponding to the clutch member 164 the wheel 158 may be caused to drive the gear 170.

In order-that the gear 170 may not be simultaneously connected with the wheels 158 and 159, I employ the following mechanism for shifting the clutch members 164. Extending transversely across the front end of the turret 116 is a shaft 173, which shaft is journaled for rotation Aon an axis parallel to the plane which includes .the axes of rotation of the wheels 158 and 159. Arranged coaxial with the shaft 173 are a pair of sleeve members 174 and 175, which sleeve members carry at their adjacent ends mutilated pinions 176 and 177 respectively, which pinions mesh with short racks 178 and 179, these racks being pivotally connected to rocker larms 180 and 181 which carry the shipper forks 182 and 183 for shifting the clutch members 164 and are pivoted on the turret 116. For the purpose of operating the sleeves 174 and 175, I have provided suitable mechanism which will prevent the engagement of one of the clutch mechanisms except at a time when the other is out. This mechanism is interchangeable from one side to the other of the turret for convenience in handling the machine and includes a pairof handles 184 and 185. The handle 184 may be connected directly to either end of the shaft 173, while the handlev 185 may be connectedV directly to either of the sleeves 174 or For the. purpose of connecting the shaft 173 with the other of the sleeves, I employ a member 186 which is adapted to be secured to either end of the shaft 173 and which nts over and may be connected by a suitable spline, or in any other manner, to the sleeve 174 or 175 to which the handle 185 is not then connected. It will thus be evident that the twohandles may be placed at the same side of the turret and yet operate both of the clutches as desired. For the purpose of preventing the engagement of Vone clutch when the other is engaged, or in fact in any position except full disengagement, I arrange a plate 188 between the handles 184 and 185 and can secure this plate by screws 189 at either side of the turret depending upon the positions of the handles. The plate is rtraversed by an opening 190 through which there is slidably arranged a round or cone-ended locking pin 191. These pin receiving sockets are respectively numbered, for the handles 184 and 185, 194 and 195. "The length of the pin 191 is such that, when one end of the same is received the shaft 208 where the latter projects through occupies, the handle containing that socket cannot be turned, it being understood that the handles are provided with abutment surfaces adjacent the sockets to prevent the movement of the pin out of the socket in which it may be lodged except at the time when the other socket comes opposite the pin. From this description, it will be gathered that the sockets are so placed in the handles 184 and 185 that, when both sockets are in clutch disconnecting position, the sockets 194 and 195 come over the pin 191. Accordingly, as soon as either c-f the handles is moved, the pin 191 is forced into one of the sockets in such manner as to lock that lever which has not been moved `and until the lever which has been moved is returned to initial or off position the other lever is held against movement.

The worms 156 and 157 are of materially different pitch, the purpose of this being to provide forl different rates of swing of the cutter bar. The shaft 171 upon which the gear 170 is keyed is provided at its upper end with a driving pinion 200, which pinion meshes with the internal gear 189. As a result, it will be observed that the turret may be turned to swing the cutter bar about the axis of the shaft 123 by rotation of the gear and, since the gear 170 is arranged to be rotated in opposite directions and at different speeds by the connections previously described, it will be understood that the bar may be swung in opposite directions and at different speeds at the will of the operator. The swing of the bar that is accomplished by the drive from the worm 157'is employed for positioning the bar prior to cutting, while the worm 156 is used to swing the bar during the making of a swinging cut. No means is needed to lock the bar during the time when it is not to be swung as, so long as either of the clutches 164 is in clutch engaging position, there can be no movement of the bar on account of the presence of the worms in the drive connections for the gear 200.

Now returning for a moment to the description of the mechanism driven by the worm gear 159 and noting Fig. 7, it will be seen that between the members 161 and 162 there is secured the supporting flange of a bevel gear 201. This bevel gear is accordingly rotated whenever the worm wheel 159 is rotated. The gear 201 meshes with another bevel gear 202 secured to a hollow shaft 203 journaled upon an axis parallel to the axis of the shaft 118 in the turret 116. This hollow shaft at its rear end carries a spur pinion clutch element 204. Coaxial with the shaft 203 and journaled at one end within the bore of that shaft is a shaft 205, which shaft is provided near one end with spur teeth 206 corresponding to the spur teeth 204 and connectable with the latter by a shiftable clutch element 207 which may be moved by a rocker shaft 208 and clutch shipper lever 209 engaging the groove 210 in the periphery of the member 207, therevbeing a suitable operating handle 211 arranged upon the end of the wall of the turret casing 116. Upon the opposite end of the shaft 205 there is a pinion 212 which meshes as indicated in Fig. 4 with the internal gear 110. It will therefore be clear that if desired, by connecting the

elements

204 and 206 by means of the element 207 and by the drivit will be possible to cause rotation of the turret 116 about the axis of the shaft 118 since, the internal gear 110 being secured to the inner periphery of the front end of the turret member 107, the turret member 116 will be rotated as the shaft 205 travels in a circle around the axis of the shaft 118. To prevent rotation of the turret 107 about the axis of the shaft 30 except at desired times, I employ a suitable locking means best shown in Figs. 8 and 9 comprising a number of rack teeth 213 mounted upon an arm 214 and swinging about a shaft 215 which projects through the wall of the gear casing 5 in such manner as to be accessible for the attachment thereto of an operating lever 217. This operating lever may be fixed in locking or unlocking position by the aid of suitable gear teeth 219 and latch 220. Similar locking means is employed in conjunction with gear 110, the parts controlling locking of the turret 116 being similarly controllable, the diiference being that in the first case the gear is held stationary by the locking means, while in the other the gear is already stationary and the turret 116 is the part held.

Formed upon the shaft 63 forwardly of the bearing 65 is a spur clutch element 221 which is connectable with a similar clutch element 222 secured to a shaft 223 which is journaled at one end within the shaft 63 and at its opposite end in the front plate of the gear housing 5 as at 224. The shaft 223 has formed upon it a pinion 225 which meshes with the internal gear 104. A

suitable clutch element or sleeve 226 is arranged to interconnect the clutch elements 221 and 222 and may be shifted by the shipper element 227 controlled by a handle 228 at the top of the gear housing 5, the handle 228 serving to rotate the 1.,',

shaft 229 which swings the shipper element 227 and is locked in its operative position by any suitable means. It will be evident that depending upon the direction of rotation of the reversible rotatable shaft 63 the turret 102 may be turned in opposite directions, while the same may be prevented from turning during cutting feed of the machine by simply disconnecting the clutch elements 221 and 222.

The possibility of disconnecting the shaft 123 from the sleeve 122 for the purpose of interrupting chain drive is obvious from what has gone before. For the purpose of accomplishing this, a sleeve 230 is slidably disposed adjacent the top of the sleeve 122 and by means of teeth 231 secured to the sleeve 122, upon suitable shifting of the element 230 upwardly, the teeth 124 and the teeth 231 may be connected to cause driving of the cutter chain driving sprocket 125 while, by downward movement of the sleeve or clutch element 230, drive of the cutter chain driving sprocket 125 may be interrupted. The member 230 is provided in its periphery with an annular groove 236 with which a shipper element 237 cooperates. This element is moved by a lever 238 keyed on the shaft 239, the lever 238 being one arm of a bell crank 240. The other arm 241 of the bell crank is slotted as at 242 and an eccentric pin 243 mounted upon a transverse shaft 244 projecting through the side isn ., tain details of operation give, let the axis of rotation of the armature axis of the shaft 118 be designated B. then the axis about which the turret 116 turns.

, nated D and shown Fig. 15. The cutter bar which by the cutter bar in different tions being indicated by the circles E, F, G and 116 is bodily rotated about the axis of the armature shaft, the cutter bar may be maintained in any given plane it happens to be in at the beginning of such bodily rotation, for the gearing which rotates the turret 116 on the axis of the shaft 118 is so proportioned that the turret 116 will rotate on its own axis at such a rate as to keep the plane of the bar constantly parallel to a given plane. This phenomenon is accomplished by simultaneously releasing both turrets 107 and 116. It will be understood that it is not necessary to accomplish this result for, by employing the drive for the gear 225 while the drive for the gear 212 is interrupted, there will be no turning of the turret 216 about the axis of the shaft 118, and if the gear 212 is driven while the gear 225 is not driven, there will be no bodily rotation of the turret 116, although the same will rotate about the axis of the shaft 118.

Figure l5 is presented for the purpose of showing the diferent possibilities of cut with my improved mining machine. For the purpose of more readily considering this figure and cer- Which I shall now A will then be the 116 is bodily rotat- 107 turns. Let the B is shaft 30 be designated A. axis about which the turret able and in which the turret Let the axis of the shaft 123 be designated C. C is the axis about which the cutter bar swings. Now observing Figure 15, it will be noted that Y, the axis A is, except for tilting slightly above and below a horizontal position, ixed save for longitudinal movement in the direction of bodily movement of the entire machine. The axis B is rotatable about the axis A in the path desigin a dot-and-dash line in is oiTset from the axis B may be caused to assume any position around the axis B irrespective of the position of the axis B, the several paths passed through illustrative posi- H. Dependent upon the relative amount of offset between the axes A and B and the distance of the cutter bar from the axis B, it will be possible to obtain varying results in the limits in which the machine may cut. If the distance between the central plane of the cutter bar and the axis B is equal to or less than the distance between the axes A and B, conceived of as extended in parallelism with each other, it will be possible for the cutter bar to be brought into a plane which coincides with its plane'and which passes through the axis A. If the distance between the axis B and the plane of the bar is A greater than the distance between the axis B and the axis A, the cutter bar can never assume a position in the plane which A. If a cutter chain of suflicient width of cut is employed, it will be evident from the outer series of bar positions indicated at I1, I2, Ia, that they may be made to cut in a complete cylindrical path. The positions of the bar shown at J and J2 demonstrate the possibility of moving the bar into positions in the same plane with the bar supporting elements in different relative positions.

To make plain the mode of operation of this mechanism its operation as a whole will be concisely explained. On entering the mine, the machine will run to the room in which work is to be done under power transmitted to the truck includes the axis Leva'zc wheels 2 from the armature shaft' 30 by Way of the pinion 32, gear 33, worm 35, wheels 36, driving sprocket 39 and the sprocket chain 85. When the machine reaches the place where a cut is to be made, the bar may be adjusted into any desired plane by effecting rotation about one or both of the axes A and B, as may be found necessary. The bar may be swung about the axis C by the fast swinging means described as a preliminary to a sumping cut. The entire machine may be fed into the coal by means of the truck drive effected by driving sprocket 77. When the cut has been made to the desired depth, rotation of the driving sprocket 77 may be discontinued and the machine will be locked in position owing to the worms in the sprocket drive. The mechanism for swinging the bar may then be employed to swing the bar during the making of a transverse cut, at this time the slow swinging feed previously described being employed. When the bar has made its swinging cut by reversing the drive of the sprocket 77, the machine may be backed out of the coal, completing the cut during the retraction. The parts may be then operated to bring the longitudinal axis of the cutter bar into parallelism with the longitudinal axis of the machine and the bar brought down to a position near the track where the equilibrium will be more stable. The machine may then be run 01T to a new place Where work is to be done. For longwall cutting all that is necessary to do Longwall cuts as well as shortwall cuts may be made at any height and further may be made at any angle within a very wide range. If it is desired to make an undercut, or a top out at a slight angle, this can be accomplished by providing the bar with a slight initial downward or upward tilt by tilting the entire machine around the transverse axis extended by the journal members 9. It will be equally clear that when desired any variety of shearing, either adjacent the center of the room or entry, or adjacent the side wall, within reasonable made with my impossibilities, but there are obviously others which will suggest themselves to those skilled in the art.

While I have in this application specically described one form which my invention may departing .from its spirit or the scope of the appended claims.

What I claim as new Letters Patent is:

and desire to secure by 1. In a mining machine, a portable frame, n

cutting means thereon including a motor mounted on said frame, and means driven from the opposite ends of said motor shaft for respectively effecting feed of said frame as a whole during cutting and feed during running around a ning gear alternatively driven by opposite ends of said motor.

3. In a mining machine, Va portable frame, cutting mechanism mounted thereon, a motor mounted on said frame having a power shaft and adapted to actuate said cutting mechanism, and selfcontained means driven from the opposite ends of said power shaft for effecting translation of said frame at different predetermined speeds while said motor speed remains substantially constant.

4. In a mining machine, a portable frame, cutting mechanism mounted thereon,.a motor mounted on said frame having a power shaft and adapted to actuate said cutting mechanism, and means driven from the opposite ends of said motor shaft for respectively effecting feed of` said frame during cutting and feed during running around a mine.

5. In a mining machine, a portable frame, cutting mechanism mounted thereon, a motor mounted on said frame having a power shaft extending longitudinally of said frame and adapted to actuate said cutting mechanism, and means driven from the opposite ends of said power shaft for effecting translation of said frame at different speeds including clutch means for rendering said feeds alternately operative.

6. In a mining machine, a portable frame, cutting mechanism mounted thereon, a motor mounted on said frame having a power shaft extending longitudinally of said frame and adapted to actuate said cutting mechanism, and means driven from the opopsite ends of said motor shaft for respectively effecting feed during cutting and feed during running around a mine.

7. In a mining machine, running gear, a reversible motor mounted on said running gear, and means alternatively driven by opposite ends for effecting drive of said driven by one end of gearing for effecting gear without rerunning gear, said means said motor shaft including reverse drive of the running versal of the motor.

8. In a mining machine, running gear, a reversible motor mounted on said running gear, and means alternatively driven by opposite ends of the motor shaft for effecting drive of said running gear, said means driven by one end of said motor shaft including means :for effecting reverse drive of the running gear without reversal of the motor and each of said means being frictionally controlled.

9. In a mining machine, running gear includv-ing a rotatable propelling member engaging the surface over which said machine moves, a motor supported on said running gear, and driving means therefor including a single driving element rotatable coaxially with said propelling member alternatively driven by opposite ends of the motor to effect drive of said member, said driving means being frictionally controlled during either drive.

10. In a mining machine, running gear, a mo- -tor supported on said running gear, and means including a single driving connection with said running gear and alternatively operative clutches for driving said running gear in either direction by either end of the motor shaft.

11. In a mining machine, running gear, a re-l versible motor supported on said running gear, and means including a single driving connection to said running gear alternatively. driven in either direction by either end of the motor shaft for actuating saidrunning gear,` said means including mechanism whereby said running gear may be driven in opposite directions by one end of said motor shaft without reversal of the motor, and said mechanism being included only in the connections between one end of said motor and said single driving connection.

12. In a mining machine, running gear, a reversible motor supported on said running gear, and means including a single driving connectionto said running gear alternatively driven in either direction by either end of the motor shaft for actuating said running gear, said means including mechanism whereby said running gear may be driven in opposite directions by one end, but only one end, of said motor shaft without reversal of the motor, and said mechanism being included only in the connections between one end of said motor and said single driving connection.

13. In a mining machine, running gear, a motor mounted on said running gear, said running gear including a shaft on which a driving member is mounted, and means for driving said driving member including separate driving elements each constantly operatively connected with said driving member and respectively adapted to be driven in either direction by opposite ends of the motor shaft.

14. In a mining machine, a truck frame, means for effecting translation thereof including a truck wheel, a rotatable driving member for said truck wheel, a plurality of rotatable elements constantly connected for rotation with said rotatable driving member and adapted selectively to constitute driving members for the latter, driving means for said rotatable elements, and mechanism between said driving means and said elements operative to connect them in driven relation to said driving means or to permit free rotation thereof.

15. In a mining machine, a truck frame, means for effecting translation thereof including a truck wheel, a driving sprocket connected with said wheel in driving relation, a chain passing around said sprocket, a pair of driving sprockets operatively engaging with said chain, and means whereby either of said last mentioned sprockets ny be driven by power or permitted to rotate 1 y.

16. In a mining machine, a truck frame, means for effecting translation thereof including a truck wheel, a driving sprocket connected with said wheel in driving relation, a chain passing around said sprocket, a pair of driving sprockets operatively engaging with said chain, and means whereby either of said last mentioned sprockets may be driven in either direction by power or permitted to rotate idly.

17. In a mining machine, a truck frame, means for effecting translation thereof including a truck wheel, a driving sprocket connected with said wheel in driving relation, a chain passing around said sprocket, a pair of driving sprockets operatively engaging with said chain, and means whereby either of said last mentioned sprockets may be driven at different rotative speeds by power or permitted to rotate idly.

18. In a mining machine, a truck frame, means for effecting translation thereof including a truck wheel, a driving sprocket connected with said wheel in driving relation, a chain passing varound said sprocket, a pair of driving sprockets operatively engaging with said chain, and means whereby either of said last mentioned sprockets may be driven at different speeds in either direction by power or permitted to rotate idly.

19. In a mining machine, a truck frame, means for effecting translation thereof` including a truck wheel, a driving sprocket connected with said wheel in driving relation, a chain passing around said sprocket, a pair of driving sprockets operatively engaging with said chain, and means including a single motor disposed on said truck frame whereby either of said last mentioned sprockets may be driven by power or permitted to rotate idly.

20. In a mining machine, a truck frame, means for effecting translation thereof including av truck wheel, a driving sprocket connected with said wheel in driving relation, a chain passing around said sprocket, a pair of driving sprockets operatively engaging with said chain, and means including a single motor disposed on said truck frame whereby either of said last mentioned sprockets may be driven by power or permitted to rotate idly, said last mentioned means including means for rotating one of said last mentioned sprockets in opposite directions while said motor rotates in the same direction.

121. In a mining machine, a truck and driving means therefor including a member having rotary motion only relative to said truck and operative on rotation to eifect movement of translation of the truck, a plurality of toothed members constantly operatively connected through their peripheries with said first mentioned member, a motor, and means for connecting said motor selectively to either of said last mentioned members.

` 22. In a mining machine, a truck and driving means therefor including a member oper` ative on rotation to eect movement of translation of the truclna plurality of members con-- stantly operatively connected with said rst mentioned member and adapted alternatively to act as driving means therefor, a motor, and means for connecting said motor alternately -to either of said last mentioned members, said last mentioned means including mechanism operative to drive one of said members in opposite directions without reversal of the motor.

23. In a mining machine, a truck and driving means therefor including a member operative on rotation to effect movement of translation of the truck, a plurality of members rotatable on parallel axes and constantly operatively connected with said first mentioned member, a reversible motor, and means for connecting said motor selectively to either of said lastmentioned members.

24. In a mining machine, a truck and driving means therefor including a member operative on rotation to eiect translation of the truck, a plurality of members rotatable on parallel axes and continuously connected in operative relation to said rst mentioned member, a motor carried on said truck, and means including a reversing gearing and motor reversing means for effecting the driving in opposite directions of said first mentioned member.

25. In a mining machine, the combination with a cutter bar and driving motor therefor, of means for swinging said cutter bar in opposite directions at different speeds by power including a rotatable member to which said bar is connected, and means including parallel shafts perpendicular to the plane of swing of said bar selectively operable to drive said rotatable member to effect bar swing.

"26. In' a' mining machine', the combination with a cutter bar and a driving motor therefor, of means for swinging said cutter bar in opposite directions at different speeds by power from said motor including a rotatable member by which said bar is carried, a driving member for said rotatable member rotating on an axis parallel to the axis of the latter, and driving means for said driving member including a plurality of driving trains each of which includes a shaft driven by said motor, said shafts being parallel to each other and to a plane including the axis of said driving motor.

27. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for swinging said cutter bar in opposite directions at dierent speeds by power including a rotatable member to which said bar is connected, and means including parallel shafts rotating at different speeds operatively connectible in driving relation with said rotatable member to swing said bar at different speeds.

28. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for swinging said cutter bar in opposite directions at different speeds by power from said motor including a rotatable member by which said bar is carried, a driving member for said rotatable member rotating on an axis parallel to the axis of the latter, and a pair of shafts driven by said motor at different speeds and disposed parallel to said axis of rotation and operatively connectible with said driving member.

29. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for swinging said cutter bar in opposite directions at different speeds by power from said motor including a rotatable member by which said bar is carried, a' driving member for said rotatable member rotating on an axis parallel to the axis of the latter, a pair of shafts driven by said motor at different speeds and disposed parallel to said axis of rotation and operatively connectible with said driving member, and means manually operable to effect such connection alternately but not simultaneously.

30. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for swinging said cutter bar in opposite directions at different speeds by power from said motor including a rotatable member by which said bar is carried, a driving member for said rotatable member rotating on an axis parallel to the axis of the latter, a pair of shafts driven by said motoi at different speeds and disposed parallel to said axis of rotation and operatively connectible with said driving member, and means manually operable to effect such connection alternately but not simultaneously, said means being provided with operating elements adapted to be arranged ateither side of said cutter bar. l

3l. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for supporting and positioning said bar to'cut in various planes parallel to a horizontal axis and for swinging said bar during cutting including a turret rotatable on a horizontal axis and means carried by said turret including a rotatable member to which said bar is connected and means including parallel shafts rotating at different speeds each operatively connectible in driving relation with said rotatable member.

32. In a mining machine, the combination with a cutter bar and a driving motor therefor,

of means for supporting and positioning said bar to cut in various planes parallel to a horizontal axis and for swinging said bar during cutting including a turret rotatable on a horizontal axis and means carried by said turret including a rotatable member by which said bar is carried, a driving member for said rotatable member rotating on an axis parallel to the axis of the lai'- ter, and a pair of shafts driven by said motor and disposed parallel to said axis of rotation and each operatively connectible with said driving member.

33. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for supporting and positioning said bar to cut in various planes parallel to a horizontal, axis and for swinging said bar during cutting including a turret rotatable on a horizontal axis and means carried by said turret including a rotatable member by which said bar is carried, a driving member for said rotatable member r0- tating on an axis parallel to the axis of the latter, a pair of shafts driven by said motor and disposed parallel to said axis of rotation and each operatively connectible with said driving member, and means manually operable to effect suoli connection alternately but not simultaneously.

' 34. In a mining machine, the combination with a cutter bar and a driving motor therefor, of means for supporting and positioning said bar to cut in various planes parallel to a horizontal axis and for swinging said bar during cutting including a turret rotatable on a horizontal axis and means carried by said turret including a rotatable member by which said bar is carried, a

driving member for said rotatable member rotating on an axis parallel to the axis of the latter, a pair of shafts driven by said motor and disposed parallel to said axis oi' rotation and each operatively connectible with said driving member, and means manually operable to effect such connection alternately but not simultaneously, said means being provided with operating elements adapted to be arranged at either side of said cutter bar.

35. In a mining machine, the combination with a machine frame, a pivoted cutter, and a driving motor therefor, of means for supporting said cutter on said frame permitting angular adjustment thereof about an axis extending longitudinally of said frame, said cutter being adapted to cut in planes parallel to the axis of said adjustment and being adjustable by power from said motor towards and from said axis and being automatically at different rates in opposite directions about its pivot.

36. In a mining machine, the combination with a cutter and a driving motor therefor, of means for supporting the cutter including a turret rotatable about a substantially horizontal axis, said cutter being disposable successively in parallel planes differently spaced from said axis and swingable by said motor in opposite directions in any of said planes at different speeds while said motor speed remains constant, and motor operated devices for effecting disposit-ion of said cutter bar toward and from said axis into said parallel planes at a bar positioning speed.

37. In a mining machine, the combination with a pivoted cutter and a driving motor therefor, of means for supporting the cutter including a turret rotatable about a substantially horizontal and a second turret rotatable about a parallel axis carried by said rst mentioned turret and spaced from the axis of the latter, and means for effecting opposite angular rotation of said turrets about their respective axes at equal angular rates.

38. In a mining machine, a machine frame, a swinging cutter bar, and means for adjustably supporting and moving said bar on said frame including a turret rotatable on a horizontal axis, a second turret rotatable on a parallel horizontal axis offset from said first mentioned horizontal axis, and means for effecting rotation of said iirst mentioned turret including an internal gear carried thereby and a driving gear rotatable on a shaft parallel to but offset from the axis of rotation of said turret.

39. In a mining machine, a machine frame, a swinging ci ter bar, and means for adjustably support ig' and moving said bar on said frame including a turret rotatable on a horizontal axis, a second turret rotatable on a parallel horizontal axis, and means for eifccting rotation of said second mentioned turret including an internal gear carried by said first mentioned turret and a driving gear rotatable on an axis offset from the axis of rotation of said second mentioned turret iut parallel thereto, said gear being carried by the second mentioned turret.

40. In a mining machine, a machine frame, a swinging cutter bar, and means for adjusting said "par and supporting the same on said frame including` a plurality of turrets rotatable on parallel horizontal axes, and a plurality of turret rotating shafts offset from but parallel to said axes.

fil. In a mining machine, a machine frame, a swinging cutter bar, and means ior adjusting said bar and supporting the same on said frame including a plurality of turrets rotatable on parallel horizontal axes, and a plurality of turret rotating shafts offset from but parallel to said axes, the shaft for rotating one oi said turrets being carried on said frame and the shaft for rotating the other turret being carried by the latter.

42. In a mining machine, a machine frame, a swinging cutter bar, and means .for adjustable supporting and moving said bar on said frame including a turret pivoted on a horizontal axis on said frame, a turret pivoted on a parallel horizontal axis on said first mentioned turret, means for eifecting rotation of said turrets on said axes including a shaft rotatable on an axis parallel to said horizontal axis and carried by said frame, and a second shaft carried on said second mentioned turret and parallel to said first mentioned shaft.

43. In a mining machine, a machine frame, a pivoted cutter bar supported thereon for swinging in different angularly related planes, a motor on said frame, and means for swinging said bar by power from said motor including bar swinging mechanism and a friction clutch between elements of said mechanism having automatically limited loading means, said loading means including a spring normally tending to load said clutch.

4:4. In a mining machine, a machine frame, a pivoted cutter bar supported thereon, a motor on said frame, and means for swinging said bar by power rfrom said motor including bar swinging mechanism between certain of whose elements a friction clutch is arranged, said clutch having a spring normally tending to load the same and manual means for permitting said spring so to operate without applying additional force thereto.

45. In a mining machine, transmission mechanism, a friction clutch, a shipper therefor movable to load the same, a spring tending to move said shipper to load said clutch, means normally preventing said spring from moving said shipper to load said clutch, and manually movable means operable to permit said spring to cause loading of said clutch without applying additional force thereto.

46. In a mining machine, transmission mechanism, a friction clutch operable when loaded to cause driving of said transmission mechanism in one direction, a friction clutch operable when loaded to cause driving of said transmission mechanism in the other direction, a shipper intermediate said clutches, a pair of springs tending tormove said shipper in opposite directions, and manual means for rendering one of said springs inoperative to permit the other to cause loading of one of said frictions, said last'mentioned spring acting expansively against a fixed abutment to eect loading.

47. In a mining machine, transmission mechanism, a friction clutch operable when loaded to cause driving of said transmission mechanism in one direction, a friction clutch operable when loaded to cause driving of said transmission mechanism in the other direction., a shipper intermediate said clutches, a pair of springs tending to move said shipper in opposite directions, manual means for rendering one of said springs inoperative to permit the other to cause loading of one of said frictions, said last mentioned spring acting expansively against a lixed abutment to eifec't loading and means for varying the compression of said springs.

48. In a mining apparatus, a wheel mounted truck, a mining machine on said truck, a chain 'drive for said truck including a chain loop operatively connected with at least one truck wheel, and a plurality of driving sprockets projecting laterally from said machine and engaging with said loop.

49. In a mining apparatus, a wheel mounted truck, a mining machine on said truck, a chain drive for said truck including a chain loop operatively connected with at least one truck wheel,

a plurality of driving sprockets projecting laterj ally from said machine and engaging with said loop, and means for tightening or loosening said chain.

50. In a mining apparatus, a wheel mounted truck, a mining machine on said truck, a chain drive for said truck including a chain loop operatively connected with at least one truck wheel, a plurality of driving sprockets projecting laterally from machine and engaging with said loop, and means for tightening or loosening said chain including an idler having an eccentric journal on its mounting.

5l. In a mining apparatus, a truck, a mining machine thereon, said mining machine comprising a body and a plane pivoted cutter bar adjustable bodily about a pairof parallel pivots 'extending longitudinally of said body and also mounted for swinging movement in its own plane, and means for tilting said body on said truck to give said bar an upward or downward Y gj inclination. 'ic

52. In a mining apparatus, a machine frame, a turret rotatable about a horizontal axis supported on said frame, a cutter bai' pivoted between its ends and mounted on said turret and swingable about an axis perpendicular to said horizontal axis, and means for swinging said bar iii-opposite directions about its pivot including a pair of members rotatable on axes perpendicular to the axis of swing of said bar and respectively at opposite sides of such axis.

53. In a mining apparatus, a machine frame, a turret rotatable about a horizontal axis supported on said frame, a pivoted cutter bar mounted on said turret and swingable about an axis perpendicular to said horizontal axis, means for swinging said bar in opposite directions including a pair of members rotatable on axes perpendicular to the axis of swing of said bar and respectively at opposite sides of such axis, and a pair of members rotatable on axes parallel to such axis.

54. In a mining apparatus, a machine frame, a turret rotatable about a horizontal axis supported on said frame, a pivotedk cutter bar mounted on said turret and swingable about an axis perpendicular to said horizontal axis, means for swinging said bar in opposite directions including a pair of members rotatable on axes perpendicular to the axis of swing of said bar and respectively at opposite sides of such axis, a pair of members rotatable on axes parallel to such axis, and a member operative on rotation to directly effect swing of said bar, said last mentioned member being alternately connectible with said last preceding pair of members.

55. In a mining apparatus, a truck frame, a mining machine pivotally supported on said truck, and means for tilting said machine upon said frame and holding it without manual intervention in different adjusted positions including a horizontal shaft parallel to the axis of tilting and mounted on said frame, lever means secured to said shaft engaging the mining machine and connected thereto, and lever means on said shaft for turning the same.

' 56. In a mining apparatus, a truck frame, a mining machine pivotally supported on said truck, and means for tilting said machine upon said frame and holding it without manual intervention in a plurality of tilted positions including a horizontal shaft parallel to the axis of tilting and mounted on said frame, lever means secured to said shaft engaging and mining machine and connected thereto, and parallel lever means on said shaft for turning the same.

57. In a mining apparatus, a truck frame, a mining machine pivotally supported on said truck, and means for tilting said machine upon said frame and holding it without manual intervention in a plurality of tilted positions inv eluding a horizontal shaft parallel to the axis of tilting and mounted on said frame, lever means secured to said shaft, means in fixed relation to said mining machine providing a slot in which the extremity of said lever means moves,

ing the mining machine, lever means on saidv shaft for turning the same, rand means carried on said machine for applying force to said last mentioned lever means.

59. In a mining apparatus, a truck frame, a mining machiney pivotally supported on said truck, and means for tilting said machine upon culating cutter chain member operatively connected to cutting devices, a motor said mechanism relative save for pivotal said frame including a horizontal shaft parallel to the axis of tilting mounted on said frame, lever means secured to said shaft engaging the mining machine, a lever on said shaft for turning the same, and means carried on said machine for applying force to said lever, said last mentioned means comprising a screw operatively connected to said lever and a manually rotat'- able nut carried by said machine.

in a mining apparatus, a truck fra-me, a mining machine pivotally supported on said truck, and means for tilting said machine upon said frame including a horizontal shaft parallel to the axis of tilting mounted on said frame, lever means secured to said shaft engaging the mining machine, a lever on said shaft for turning the same, and means carried on said machine for applying force to said lever, said last mentioned means comprising a screw operatively connected to said lever, a manually rotatable nut carried by said machine and ratchet mechanism for rotating said nut.

Gl. ln a mining apparatus, a machine frame, motor thereon, a pivoted cutter bar, a cirthereen, means for supporting said bar for bodily adjustment on said trame including a plurality of horizontal longitudinally pivoted turret elements, and means operable by said motor to selectively turn either or both of said turret elements or swing said bar, and to drive said chain or leave it idle.

62. ln a mining apparatus, a truck frame,

mechanism including cutting devices and actuating therefor adjustably mounted on said truck frame, and means for effecting adjustment of said mechanism relative to said truck frame including an actuating member movable longitudinally of said frame, a pivoted member fixed save for ivotal movement connected at one end to said truck frame and operatively connected at its other end to said mechanism, and means connecting said actuating member and said last mentioned member to cause the end of said last mentioned said mechato move to positions in different horizontal planes.

63. ln a mining apparatus, a truck having supporting means,

frame mechanism including actuating the same, and a truck driving memo adjustably mounted on said frame, operative connertions between said truck driving member and said supporting means, and means for eifecting adjustment of to said truck frame Without interrupting the operative connections beteen the truclr. driving member and truck wheels including actuating member movable longitudinally of said frame, a pivoted member movement connected at end to said truck frame and operatively connected at its other end to said mechanism, means connecting said actuating member and said last mentioned member to cause t -e end of said last mentioned member operatively connected to said mechanism to move to positions in different horizontal planes.

In a mining machine, a portable Wheel supported frame, cutting means thereon includin a motor mounted on said and means fen from the opposite ends of said motor shaft "or respectively eifecting propulsion of the frame .rough truck. wheel drive at a cutting speed during cutting and atv substantially more rapid moving speed during runningy around 'a mine,

both While the motor speed is substantially constant.

65. In a mining machine, a portable frame, cutting means thereon including a motor mounted on said frame, and means driven from the opposite ends of said motor shaft for respectively eifecting feed of said frame as a Whole during cutting and feed during running around the mine, the means for effecting feed during cutting comprising reverse mechanism permitting reversal of feed While the cutting means operates continuously in one direction.

66. In a mining machine, a portable frame provided with running gear, cutting means thereon including a mot-or mounted on said frame, and running gear `riving means driven from the opposite ends of said motor shaft for respectively eifecting feed of said frame as a Whole during cutting and feed during running around the mine.

67. In a mining machine, a portable frame provided with running gear, cutting means thereon including a motor mouned on said frame, and running gear driving means driven from the opposite ends of said motor shaft for respectively effecting feed of said frame as a Whcleduring cutting and feed duri a running around the mine, the means for effecting feed during cutting comprising reverse mechanism permitting reversal of feed While the cutting means operates continuously in one direction.

68. fn mining machine, a trucl; f' nc, means for eifecting translation thereof including a truck Wheel, a rotatable driving mei-ber for said trucl; Wheel, a plurality of rotatable sproclzet elements constantly connected for rotation with said rotatable driving member and adapted selectively to constitute driving members for the latter, driving means f r said rotatable elements, and mechanism said elements operative to connect them in driven relation to said driving means or to permit free rotation thereof.

69. In a mining machine, a truck frame, means for a truck Wheel, a rotatable diving member for s id truck Wheel, a plurality of rotatable ele-- ments constantly connected for rotation with said rotatable driving member and adapter.

lectively to constitute driving members for the latter, driving means for said rotatable elements rotatable at diiferent predetermined rates, and mechanism between said driving means and seid elements operative to connect them in driven relation. to said driving means or to permit free rotation thereof.

'70. In a mining machine, a Wheeled truck frame adapted to travel along a mine tra .i a machine body pivotally mounted on franc for tilting movement relative thereto on a transverse asis, a cutter carrying head mounted on said body for rotation about a longitudinal a cutter bar pivotally mounted on f .id head for svvin ng movement about an perpendicular to said head airis, a motor carried by said body. mechanism driven by said motor for rotating said head to move said bar into parallel planes and for swinging said bar about its pivot, mechanism driven by said motor for propelling the machine along the mine traclrvvay.

7l. ln a mining machine, a wheeled trucl; frame, a machine body pivotally mounted on said frame for tilting movement re thereto on a transverse airis, a cutter carrying head mounted on said bcdy for rotation about a longibetween said driving means and eecting translation thereof including bar about its tudinal axis, a cutter bar pivotally mounted on said head for swinging movement about an axis perpendicular to said head axis, a motor carried by said body, and mechanism driven by said motor for rotating said head and for swinging said bar about its pivot at a predetermined fast bar positioning speed in one direction and at a predetermined slow cutting speed in the opposite direction.

72. In a mining machine, a wheeled truck frame, a machine body pivotally mounted on said frame for tilting movement relative thereto on a transverse axis, a frame mounted on said body for rotation about a longitudinal axis, a cutter carrying head mounted on said last mentioned frame for rotation about a longitudinal to said frame axis, a cutter bar mounted on said head for swinging movement about` an axis perpendicular to said head axis, a motor carried by said body, and mechanism driven by said motor for rotating said frame relative to said body, for rotating said head relative to said frame and for swinging said pivot.

73. In a mining machine, a wheeled truck frame adapted to travel along a mine trackway, a machine body pivotally mounted on said frame for tilting movement relative thereto on a transverse axis, a cutter carrying head mounted on said body for rotation about a longitudinal axis, a cutter bar mounted on said head for swinging movement relative thereto and disposed in a plane oiset from said head axis, a motor carried by said body, mechanism driven by said motor for rotating said head to eiect orbital movement of said bar about said head axis and for swinging said bar about its pivot, andmechanism driven by said motor for drivingthe truck wheels to propel the machine along they mine trackway.

74.111 a mining head axis, a motor carried by said body, and mechanism driven by said motor for rotating said rotatable frame, for rotating said head to eiect orbital movement of said cutter bar about said head axis and for swinging said bar about its pivot.

'75, In a mining machine, a wheeled truck frame, a machine body mounted thereon, a frame mounted on said body for rotation about a longitudinal axis, a cutter carrying head rotatably mounted on said rotatable frame for rotation about a longitudinal axis parallel to said frame axis, a cutter bar pivotally mounted on said head for swinging movement relative thereto, a motor carried by said body, and mechanism driven by said motor for simultaneously rotating said rotary frame and said head about their respective axes.

76. In a mining machine, a machine body, a motor carried thereby, cutting machanism including a'cutter bar mounted on said body for swinging movement relative thereto, and mechanism driven by said motor for effecting swinging movement of said bar selectively at predetermined fast and slow speeds comprising alternatively operable fast and slow speed worm gear trains, said bar being swung at one speed through one gear train and at another .peed through the other gear train.

7'?. In a mining machine, a machine body, a motor carried thereby, cutting mechanism including a cutter bar mounted on said body for swinging movement relative thereto, and mechanism driven by said motor for eiiecting s 'inging movement of said bar at a plurality of pre-- determined speeds comprising alternatively eilective fast and slow speed worm gearings and friction lclutch means controlling the connection of said gearings to said motor.

78. In a mining machine, a machine body, a motor carried thereby, cutting mechanism including a cutter bar pivotally mounted on said body for swinging movement relative thereto, and mechanism driven by motor for eiecting swinging movement of said bar at a plurality of predetermined speeds comprising coaxial :tast and slow speed worms, worm gears meshing therewith disposed on parallel axes, driving connections between said worm gears and said bar, and friction clutch means controlling the connection of said worms to said motor.

79. In a mining machine, a machine body, a motor carried thereby, cutting mechanism comprising a cutter bar pivotally mounted on said body for swinging movement relative thereto, and mechanism driven by said motor for eect ing swinging mover. ent of said bar at predetermined last and slow speeds in opposite directions comprising alternatively operable fast and slow speed worm gear trains, said bar being swung at one speed through one gear train and at another speed through the other gear train.

Si). In a mining machine, a machine body, a motor carried thereby, cutting mechanism comprising a cutter bar pivotally mounted on said body for swinging movement relative thereto, and mechanism driven by said motor for eilecting swinging movement of said bar at a plurality of predetermined speeds in opposite directions comprising alternatively eective fast and slow speed worm gearings and friction clutch means controlling the connection of said gearings to said motor.

8l. In a mining machine, a wheeled truck frame, a machine body pivotaily mounted on said frame for tilting movement relative thereto on a transverse axis, a motor carried by said body, a cutter carrying head mounted on said body for rotation about a longitudinal mechanism driven by said motor for effecting rotation or said head, and mechanism driven by said motor for driving the wheels of said truck frame irrespective of the position of said body relative to the truck wheels.

82. In a mining machine, a wheeled truck frame, a machine body pivotaliy mounted there-- on for tilting movement relative thereto on a transverse axis, a motor carried by said body having its power shaft extending longitudinally of said body, a cutter carrying head mounted on said body for rotation about a longitudinal axis, mechanism driven from the forward end of said motor for effecting rotation or" said head, and mechanism driven from the rear end of said motor for driving the wheels of said truck irrespective of the position of said body relative to the truck wheels.

83. In a mining machine, a wheeled truck frame, a machine body pivotally mounted thereon for tilting movement relative thereto on a li-a.