US1572556A - Mining machine - Google Patents

Description

Feb. 9', 1926,

R. PEALE MINING MACHINE YFiled March 24. 1.921

3 Sheets-Sheet 1 mim Nam ATTOIZNE Y Feb. 9v 1926.

R. PEALE MINING MACHINE Filed March 24. 1921 3 Sheets-Sheet z R. PEALE MINING MACHINE Filed March 24j.

Feb. 9

3 Sheets-Sheet 3.

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Patented Feb. 9, 1926.

UNITED siares A-TENT ePrice.

RICHARD PEALE, OF ST. BENDIC'I, PENNSYLVANIA, ASSIGNOR TO REMBRANDT PEALE, OIf' ST. BENEDT,'E1?ENNSYLVANIA.

MINING MACHINE.

Application mea March 24,1921. serial Nq. 454,987.

fo all fio/oni t may conce/m.'

V.lie i it known that l, RICHARD Pham, a citizen ot the United States, residing, in tt, Benedict, in the county ot Cambria land State of Pennsylvania, have made certain new and useful vl.mprovemi-znts. in Mining lvlachines, of which the following is a speci? ication,

The invention relates vto ,mining mad chines, and more especially to suchma-V chines for cutting a kerf about horizon-A tally extending core of coal and also to mechanism 'for Conveying away the Vcoal Vwhich drops 'from or is otherwise dislodged 'from the core in such a machine or any other suitable connection.

The objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention.

The invention consists in the novel parts, constructions, arrangements, combinations andl improvements herein shown and described.

The accompanying drawings, referred 'to herein and constituting a part hereof, illustrate. one embodiment ofthe invention, and together with the description, serve to explain the principles of the invention.

Of the drawings Fig. l is a longitudinal vertical section through a machine embodying` Ythe invention, taken on line 1 1 of Fig. 3;

Fig. 2 is a full end elevation, looking at F 1' from the lett or at Fig. 3 from the bottom;

Fig. 3 is a top plan corresponding` to Fig. 2, but showing part :of the machine in horizontal section on line 3--3 ot' Fig. 2;

Fig. 4 is a greatly enlarged, detached fragmentary detail, in horizontal section, ot

' onel of the reversing' mechanisms tor the conveyors, which is also shown in its connection in the machine at the central, left-hand part of Fig. 3;

Fig. is a similar' view to Fig. fl, showing the other ,driving and reversing gear for the other conveyor mechanism, which is shown in placek inthe machine at the lowercentral part ot' Fig.' 3;

Figz 6 is adetached, 'fragmentary detail, with parts .in .elevation `and parts in vertical section, ofthe conveyor blade and associated parts during the conveyil'ig stroke or travel; Y' A Fig. 'T is a view similar to (i, but showing the conveyor blade returning on the idle stroke or travel; i

F ig. 8 isa` fragmentary, det-ached detail,

taken Vin section substantially on `the line 8-8 of Fig. 3, and'showing the conveyor' er pusher blades and certain of the cooperating parts S Fig@ is a greatly enlarged, fragmentary vertical section, taken on the line 9-9 ot 3, and showing the pusher blade at the end ot its idle stroke and ready to begin the conveying stroke:

Fig. l()V is similar view to Fig. 9, but showing the pusher blade in vertical position at the beginning of the conveying,-` stroke;

Fig. ll a view similar to Fig; S), but showing the rmans for raising the pusher blade to standing position mounted on the blade itsel;

Fig. 12 is a similar view, but showing' the pusher or conveyor blade .in elevation in the posit-ion shown in dotted line in Figi'. ll;

Fig. 13 diagrammatic elevation oi' the machine, showing;` the conveyor in rela-- tion to a pile ot dislodged coal during the conveying? stroke,

Fig. 'la is a similar view to Fig'. 13, but showing the conveying mechanism returnin;v on the idle strokc and i Fig'. 15 vis a detached detail ot a handoperated reverse tor the conveyor,

Fig. 1G is a sec-tion taken on 1Gl6 oit' Fie. B.

rThe invention, as embodied, is dir-acted 'to a mining machine adapted to cut a horizontally extending core out of the solid mine wall by cutting primarily a bottom kerl and a vertical and horizontal cooperating kerli, separating the core except at the back. AThe coal of most seams when so treated will tall oli its own weight alone' the tacos or natural planes of cleavage ol the coal.

The invention provides primarily in cooperation means in such a machine adapted to cut very narrow keris and conveying the line means withinthe machine iframe of suchycompact structure 'as to be adapted to enter such a narrow -ker and to quickly and elliciently convey away the vdislodged coal. Such a construction makes possible a ina- Achine of relatively exceedingly light construction, and of relatively very great etilciency, due largely to the .reduction in the amount of work required in cutting the relatively thin kerfs.

More in detail, there is provided a thin',

` flat horizontal frame, preferably rectangu- Vdown when the machine is making the bottom kerf, and thereby to enter the kei-f, and iater to stand up' to remove the dislodged coal after the kerfs are cut and the coal has dropped down into the machine.

Referring-now in detail to the embodi-v ment of the invention illustrated by way of example in the accompanying drawings, the exemplary mining machine so shown is the same or similar, in its general features at least, to the machine shown and described in my co-pending application S. N. 391,103, tiled on June 23, 1920, so far as concerns the core cutting mechanism proper. ln connection therewith, a new form of conveying mec ianisin is shown, which is of very strong and simple construction, but principally is of such compact structure as to permit a lightening of the whole machine and especially to allow the cutting of much nar rower kerfs, especially the horizontal bottom korf, than would be otherwise possible. This results from the fact that `in this machine the conveyor enters the kerf as the lierf is cut and the kerf must be of suiicient height to admit the Vconveyor mechanism. lilith a conveyor of very compact.- construction, that is, one which is thin or occupies but a very small height within the machine frame when in the idle position (which position is occupied during thc cutting of the bottom kerf while the conveyor is entering the korf within the machine frame) permits of a correspondingly low or thin kei-f being cut. y Other features and advantagesrof the inf vention will be set forth in connection with the different groups of mechanism as they are sequentially taken up, it being understood that both the foregoing and lfollowing descriptions are explanatory and not restrictive of the invention.` Y

The embodied form of bottom kei-f cutting means comprises `a low, dat, horizontal frame l, preferably of rectangular construction, with rounded corners, as shown in Fig. 3,' 01.1 tsexterior vertical fece the 'freine l is provided with a horizontally disposed guideway 2, within which guideway runs a cutter chain 3 havingteeth Ll, the cutter chain and teeth being preferably of usual construction. lieneath the frame l is any suitable construction to provide for supporting the -machine as it slides along the mine bottom, and to allow for the maintenance of the kerf and the entry of the machine as the cutter teeth wear away. For this purpose the frame l on Iits bottoni is provided with skid rails which may be of any suitable ll (Figs. l, 2, and meshes at one side with a bevel gear l2, and at the other side with a ybevel gear i3, both of which gears are mounted loosely on a shaft 14. Shaft lll is journaled in bearings 15 and 1G, cai ried upon the machine frame.

l Fixed to the bevel gear l2 to rotate therewith is a spur gear` 1S, and lined tothe bevel gear 13 to "rotate therewith is a spur gear 19. Gear wheel `1S meshes with a gear wheel 20, and gear wheel 'l9imeshes with a gear wheel 2l, and gear wheels 2i) and 2l are mounted loosely vupon a shaft 22. Shaft 22 is journaled in bearings 23 and2il supported on the machine frame, and shown as having a common support with the journals l5 and 16 for the shaft lll.

On shaft 22 between gear wheel 20 and. gear wheel 2l is a clutch member mounted to rotate with shaft 22 but being slidable therealong.A Fixed on gear wheel 2d is a clutch aw 26, and fixed on gear wheel 2l is a clutch jaw l2l'. Clutch member 25 slidable Ainto engagement alternatively with clutch jaw 26 or 27, thereby driving shaft 22 in either' one direction or the other, as may be desired, from the motor il), through the train of gearing just described. Fixed on shaft 22 is a bevel gear wheel 30, which meshes with a crown bevel gear ring 3l, fixed on a cutter chain driving wheel 32, tht` shaft of which is suitably journaled in the machine frame. lVheel has teeth 34, which mesh with'recesses 35 in the cutter chain 3, thereby driving. the chain in either direction as desired. n The cooperating kerf eutting.r means, which complete the cut aro-Luid the horizon.- tally extending core, comprises a 'travelingl and Vrotating cutter bar, winchy nested within. the frame l, longitudinally thereof, and @Lone me Qt the' side messes.. of the Il (l frame, as shown in Fig. The cutter bar thus pz sses into the lower kerf as it is cut, and after the lower kerf is cut, the cutter bar is rotated and JVaveled, tirst vertically upwardly through the coal, then horizontally across, at or near the top of the seam, and then downwardly toward the farther end or side of the bottom korf, to complete the cut about the horizontally extending core of coal to dislodge it and cause it to fall down rinto the machine upon the conveyor.

The mechanism for effecting this is subs'antially the same or substantially similar to that .shown in my said copending application Si. N. 391,103. The cutter bar -il5 (Figs. l, and Il) is fastened upon a shaft etti, which shaft has bearing blocks 17 anddS, adapted to run in double guideways 19 and oil, having vertical side reaches and a horif zontal top reach (as best shown in` Fig. Si), with connecting,rounding corners, the blocks being` shaped to run past the corners. Suitable bracing 52 may be employed as part of the guideway construction, and a central support 52.3 may also be used.

Means are provided for traveling` the blocks 4T and 4:8 along their respective guideways to press thecutter bar l5 to the work and to make the cooperating kerf in the manner already described. Connected to the block 18V at each side thereof, and by its two ends, is a cable 56, which runs within the guideway 50. The cable 56 runs also over suitable guiding sheaves or pulleys 57 located at suitable points in the machine.

Cable 5G simultaneously winds on and oli.' a` drnm 58, thereby traveling the cutter bar in either direction along its guideway, dependent upon the direction of rotation of the drum 5S. Drum 58 is mounted loosely on a shaft 60, which shaft is journaled at 61 and on the machine frame. One head ot the drum formed as a` cone clutch (33, and a cooperating cone clutching` member il is keyed to shaft G to rotate therewith but slidable along the shatt into and out of clutching engagement with the drum.

Suitable actuating means for the clutch (il are provided, which may be manual, but are omitted from the drawing for the sake of clearness. Fixed on shaft 6() is a worm wheel (S5, with which meshes a worm (Se, which tired on a shaft GT, the shaft being` vertically disposed andjournaled in a bean infr (i8 on the ii'iachine frame. Fixed also on shaft G7 is a spiral gear wheel TO. Mesh- 4ing with the s )irai gear 70 is a spiral. gear il, 'fixed on shaft 1l.

Mounted on shaft 14; are two clutches or clutch members 'T2 and 73, rotatable with the shaft but movable therealong to pass alternatively into clutching engagement with the gear wheels 18 and 1.9, respectively. These clutches are likewise operated by suit.-

meenseieh este@ usaalfliaad levers which are` omitted from the drawings for the sake of clearness. By means o't' these clutches, shaft 1l may berotated in either direction and therewith the drum S, thereby traveling the rotating cutter bar 115, to cut its kerf as described and thereafter to return to its nest within the frame 1.

Suit-able means for rapidly rotating the cutter bar 4:5 are provided, and these may be the same or similar to those shown and described in my copending application S. N. 391,103, filed June 23, 1920.

As shown herein (Figs. 1 and 3), a gear wheel fixed to the other end of the shaft of motor 10 from the driving` connections already described, and n'ieshing there vith is a gear wheel SG, fixed on a shaft S7, which shaft is journaled at 8S and i289 on the machine frame. Fixed on shaft 8T are two sprocket wheels 89 and 90, and. running thereover, respectively, are spri'icket chains 91 and 92, the sprocket chains running also over sprocket' wheels 93 and Qll. 'lhese sprocket wheels are lined on a shaft 95, which journaled at 9G and 97 in the machine frame.

Fixed on shaft 95 a sprocket wheel 9S. over which runs a sprocket chain 99 (Figs. r1 and running in the lower part of and along guideway 50. Sprocket chain 99 meshes with la sprocket wheel 100, which is lined on shaft 46 of the cutter bar. ln like manner, a sprocket wheel 101 is fixed on shaft 95, and a sprocket chain 102 runs about wheel and upon and along the bottom channel of the guidewa-y e9. L:Sprocket chainlll meshes with a sprocket wheel 103 fixed on the shaft 4G. rllhe sprocket chains are arranged to run in the opposite directions to the cutter bar l5 (iluring its cutting travel, and. thereby rapidly rotate the cutter bar as it advances through the coal. As shown clearly in Fig. 1G, the lower reaches of these chains 99 and 102 pass beneath the conveyor 114.

Referring now in detail to the embodied form of conveyor mechanism (shown in practically all the figures), a floor 11aL e1;- tends from ust within the front reach of the frame 1 horizontally, or substantially hori zontally, backvvardly along;l the machine, past the driving mechanism for the machine, and preferably for some distance to the rear of the back reach ot the frame 1, shown in Figs. 1 and This enables the conveyor to discl'iarge the coal clear of the back reach of the frame, or to connect with another conveyor witl'iout interiiereiiice with the cutter chain. f

rlhe particular form of conveyor shown herein comprises a single `conveyi'lr or pusher blade extending across, or 'nearlyr across, the entire width ofthe 'floor-'114, and traveling substantially the entire length of floor 1111, At each side thereof,- tjhe blade 15 has pivotal connections 116 and 117, respectively, with sprocket chains 118 and 119. he sprocket chain 118 at its inner end runs over an idler sprocket wheel 126, and at its outer end it runs over an idler sprocket wheel 121, the chain 118 returning beneath the tioor 11eL to the inner or front end of the machine and to the idler 120. In like manner, sprocket chain 119, at the front or inner end of the machine runs over an idler sprocket wheel 123 and at the rear or outer end of the machine, it runs over an idler sprocket wheel 124-, this chain likewise returning beneath the floor 111. The floor 1111 is spaced up above the bottom 125 of the machine frame just suiieiently to give passage way for the sprocket chains 118 and 119, and the bottom 125 may be solid or ape tured asl desired.

ln the present embodiment, a single pusher blade 115 is preferably employed, traveling as stated substantially the entire distano f rom the inner or front end of the machine to the rear or outer end of the machine. Meansare provided, however, for varying the extent and locus of the travel of the pusher blade so that it will always be clear of any projecting portion of the core which has not been dislodged or disintegrated and fallen down in position for conveyance. The blade 115, in view of its ying down during the cutting of the bottom korf, in its standing position may be higher than the frame 1, thus giving it greater conveying efliciency.

'.lo permit the blade to lie down on its idle inward trip beneath the coal and to hold it upright or standing in its return trip, there are provided (seeespecially Figs. 6 to 8) on each of the chains 118 and 119 arms 127 pivoted respectively to the chains 128. These arms are jnrovided, respectively, with slots 129 into which slots project correspond- Iing pins '130 at each end of blade 114-. The operation of thisy mechanism will be clear from Figs. 6 and 7 without further description.

By the mechanism just described, and as shown in detail in Figs. 6 to 12 the'compactncss and the small height or thinness of the conveyor mechanism, when in idle position will be `clearly understood, as the height is little more than that of the two siu'ierposed reaches of the chains 118 and 119, except at the inner end. The idler sprockets 120 and 123 may, however, be of very small diameter, and this permits the frame 1 to be of as thin or low structure as is compatible with necessary strength and rigidity, thereby requiring but a very thin bottom kerf to be cut.

Suitable means may be employed for bringing the'pusher blade 115 to standing position at the inner end ofits trip, and for this purpose there is shown in Figs. 9 and 10 one or more hooks 136, which are pivoted to the frame at 137, their ends being adapted to take over the top end of the 'pusher blade 115, thereby to bring it, as it starts on the conveying stroke, from the lying down position of Fig. 9 to the upstanding position of F 10.

Another form of means for raising the blade is shown in Figs. 11 and 12, wherein a plurality of upwardly curved arms 188 are shown projecting from the top of the blade 115, which arms are adapted to engage with the coal and to bring the blade 1161. to standing position. rlhis devire, it will be seen, will operate to bring the blade to its upstanding position, irrespective of the place .of point at which the return or conveying stroke begins. j

Suitable guiding or idler rollers may also be provided, such as a roller 1110., adjacent lto each of the idler sprockets 120 and- 123, and rollers or sprocket wheels 142 and 143 may be arranged along the length of the chains 118 and 119. ln Fig. 1 tl e floor 1111 is shown upwardly inclined in its rear portion to pass over the back reach of the frame 1, the rollers or sprocket wheels 142 and 118 being located to keep the sprocket chains down onl the floor 114-.

Suitable driving means are provided for the main conveyor (Figs. 3 and 5), and as embodied, a gear wheel 150 is fixed on shaft 27, and meshing therewith is a pinion 151, which is fixed on a shaft 152, journaled at 153, 154tand 155 in the machine frame. This shaft is provided with a friction spring clutch 156. Fixed on shaft 152 are two gear wheels 157 and 158.k Gear wheel 157 meshes with a gear wheel 159, which wheel is loose on a shaft 160, the shaft boing journalcd in bearings 161, 162 and 163 on the machine frame.

Gear wheel 158 meshes with an idler gear wheel 165, journaled on a stub shaft 166. Idler 165 meshes with a gear wheel 167 also mounted loosely on shaft 160'. The idler serves to rotate gear wheel 167 in the opposite direction from gear wheel 159. A clutch member 176 is mounted on shaft 160 to rotate therewith, but is slidablc therealong to pass alternatively into engagement with a clutch member 171 on gear wheel 159 or with a clutch member 172 on gear wheel 167.

Means are provided (Figs. 8 and 5) for automatically voperating clutch 170 to reverse the -travel of the conveyor, and as embodied, an arm 175 has a pin engaging` in an annular' groove 176 in the clutch 170. Arm 175 is loosely mounted on a shaft 177. Mounted also on shaft 177 isa bell-crank lever 178, one arm thereof having lugs 179 and 180 projecting upwardly on either side of the arm 175. The other arm ot the bell-crank lever 178 is in the path of two tripping lugs 182 and 183, fastened at suitable points on the conveyor chain 118. yBell crank lever 178 is provided with a spring 1811, adapted in a Welhknovvn manner to thi-ovv and to hold the lever on either side of its center to prevent clutch 170 stopping in neutral position and thus stopping the conveyor.

Thus, When one of the lugs 182 or 188 engages the bell-crank lever 178, soon as the. lever passes the dead center, the spring` 181- snaps it to the other end of its throw, and the clutch 170 is thrown positively into engagement with the clutch member 171 or 172, as vthe case may be, and the possibility of'its stopping;` on neutral position is avoided, lt. will be seen that by adjustn'ient or positioning of the liiigs 182 or 183 along` the chain 118 that the distance of travel of the conveyor blade can be varied as desired. Fixed on shaft 1GO are sprocket wheels 186 and 187 meshing, respectively, with the chains 118 and 119 beneath the floor 1111, to drive the chain and thereby the 'conveyor mechanism.

In accordance with one feature ofl the invention, a short cross conveyor is provided (Figs. 8 and el) adapted to transfer or convey the dislodged coal crossivise into the )ath of the main conveyor just described. The generalconstruction may be the same as that already described, and the parte are shown in Fig. 8. A. conveyor blade 199 is shown connefted to endless sprocket chains 191 and 192 in the manner already described for the blade 115. These sprocket chains run, respectively, over idle sprocket wheels 198 and 1941 and also, respectively, over driving,` sprocket wheels 195 and 196. These latter Wheels are fixed on a shaft 19?', journaled in the machine frame at suitable points and also in the bearing' 1.98. Shaft 19T is 'provided preferably with a spring; frictioi;l clutch 199.

F shaft 19'? i. ed looselv on sha 9T 8 and #1) are bevel gear Wheels 29o and20i, vprovfuled respectively with clutch members 2 El and 299, inte( al therewith. Vletvveen in is coopei Linn' clutch member 211), rotatable with sliaft` 19?', but slidabe thorealong. lsieshingr Vwith bevel ygears 913 and 29? s' a bevel rear 211,\.vhiehis1ixed on shaft la 8?', the il being; driven from the motor 19, as already described.

The reversing means for this conveyor, as embodied, comprises a lever 212, pivoted and havin a pin prodiecting into an anular `@groove flfl- 'formed in the clutch 0. llivotaily connected to the other end is a lin.. l216, the other end thereof being pivotcd at 21'? to a bellcrank lever 218, 'which lever is pivoted at 219 upon `bell-crank lever 222.

the machine frame. Pivotally connected to the 'other end of lever 218 'is a link 220, the other end thereof being pivoted at 221 to a Bell-crank lever 222 is pivotally supported upon the machine frame at y Also pivotally supported at 223 is an arm 2211i, having iixed thereto lugs 225 anc 226, projecting up at either side of the arm 227 of bell-crank lever 222. Pivotally connected to arm 227 is a rod. 229, extending along sprocket chain 192, and having lugs 2230 land .231 in' the path of a stop 232, fixed in adjustable position upon the sprocket chain 192. It Will be clear that tivo stops 292 may be `employed if desired. A spring 233 is provided for throwing` the lever 234e over .its center to prevent the clutch 21() stopping in neutral position as already described.

Suitable baiiie plates may be provided at all necessary or desirable points toprevent interference of the moving` material with the mechanism. 1n Fig'. 8 a baille plate 28% is shown, Which lifts the coal fed in. by the cross `conveyor into Ythe path of the main conveyor over the sprocket chain 118. This plate 281 is not shown in Figure 1 as it is desired to shovvn the location of the chain 118. A similar batiie plate 285 is shown at the end ofthe main conveyor, and a housing' 239 is shown over the front end of the main conveyor. rlheee baffles are merely vertically disposed plates of proper size and `shape to direct the coal in a path over the floor of the conveyors and to keep the coal from pushing against the rollers or other movingI parts.

In 'Figs 13 and 14; there is shown in a diagrammatic manner the general action of the vconveyor in conveying away the dislodged coal.` .l

lhe machine will be provided with means for pressing-g' it to the Work, which may be of the Winding cable type, and need not be described in det-ail. tiuchv nieci'ianism may be the same or similar to that shown in my copcifiding application Ser. No. Only a portion of this mechanism is therefore shown in this case. lilleshingg,v with gear wheel 2') is a gear Wheel 2110, W'iich is tired on a shaft 2111, havingr suitable bearings 2412 in the machine frame. Fixed on shaft 241 are drums 248, upon which are' Wound the cables which press `the machine to the Work.

ln Fig. 15 a manually operated reversing device is lshown for the conveyor. As shown,

a longitudinally reciprocable handle 250, isl

loosely connectedv to arm 178 (which arm is shown also in Figs. 1 and By operating` this handle at Will, the` blade or blades 115 may be reciprocated along only a portion of the full path of travel. For instance, it could be run from the front only part Way under 'a pile of dislodged coal, just sufti ciently to get a full load, and then be drawn outwardly, thereby avoiding Waste of power in pulling the blade and its` load an unnecessary distance, which might be the case if the blade necessarily always traveled the entire length of the machine. This means may be employed in addition to or kalternatively With the automatically operating reversing n'ieans,`\vhich also settable to vary the distance of travel of the blade. The blade lli is not nec ssarily limited to the height of the machine frame, but may be made hig ier if desired.`

The invention in its broader aspects is not limited to the specilic mechanismsshown and described but departures may be made therefrom Within the scope of the accompanying claims Without departing from the principles of the invention and Without sacrificing its chief advantages.

vWhat I claim is l. A mining machine including in combination means for cutting a bottom hori- `zontal kei-f, a rotatable cutter bar nested within said lrerf cutting' means, means for moving the rotating cutter bar to cut a cooperating ire-rf, and a conveyor extending from the front to the rear of the machine and having a pusher blade nested Within said bottom lrerf cutting means.

2. A mining machine including in combination means for cutting a bottom horizontal kei-f, a rotatable cutter bar nested `Within said kei-f cutting means, means for moving the rotating cutter bar to cut a .cooperating kerf, and a conveyor extending from the front to the rear of the machine and having a pusher blade adapted to lie flat and to stand up Within said bottom kerf cutting means when traveling, respectively, in the idle and conveying directions.

3. A mining machine including in combination a low, flat horizontal frame, a cutter chain ruiming about the exterior thereof to cut a bottom kerf, a rotatable cutter bar nested Within the frame, means for moving the rotating cutter bar to cut a cooperating lrerf, and a conveyor extending from the front to the rear of the. frame and having a pusher blade nested Within the frame.

el. A mining machine including in combination a low, flat horizontal frame, a cutt vr chain running about the exterior thereof to cut a bottom lrerf, a rotatable cutter bar nested Within the frame, means for moving the rotating cutter bar to out a cooperating kerf, and a conveyor extending from the front to the rear of the frame and having a pusher blade adapted to lie flat and to stand up Wit-hin the frame when taveling, respectively, in the idle and conveying directions.

5.*A mining machine including in combination a low, flat horizontal frame, a

Lef/"fateA cutter chain running about the exterior thereof to cut a bottom kerf, a rotatable cutter bar nested just Within and alongside one of the sides of the frame, means for moving the rotating cutter bar to cut a cooperating kei-f, and a conveyor extending from the front to the back of the frame and` cutting means when traveling, respectively,

in the idle and conveying directions, and

means for imparting reciprocating travel to the pusher blade. y

7. A. 'mining machine including` in combination a low, flat horizontal frame, a cutter chain running about the exterior thereof to cut a bottom lierf, a rotatable cutter bar nested Within the frame, means for moving the rotating cutter bar to cut a cooperating kerf, and a conveyor extending from the front to the rear of the frame and having a pusher blade adapted to lie fiat and to stand up within the frame when traveling, respectively, in the idle and conveying directions, and means for imparting reciprocating travel to the pusher blade.

8. A mining machine including in combination a low, flat horizontal frame, a cutter chain running about the exterior thereof to cut a bottom kerf, a rotatable cutter bar nested just within and alongside one of the sides of the frame, means for moving the rotating cutter bar to cut a cooperating kerf, and a conveyor extending from the front to the back of the frame and located Within the cutter chain and having a pusher biade adapted to lie down and to stand up Within the frame when traveling, respectively, in the idle and conveying directions, and means for imparting reciprocating travel to the pusher blade.

9. A. mining machine including in combination a low, vflat horizontal' frame, a cutter chain running about the exterior thereof to cut a bottom kerf, a rotatable cutter bar nested just Within and alongside one of the sides of the frame, means for moving the rot-ating cutter bar to cut a cooperating kerf, and a conveyor extending from the front to the back of the .frame and located Within the cutter chain and having a pusher blade adaptedto lie down and to stand up Within the frame when traveling, respectively, in the idle and conveying' directions, the pusher blade projecting' above said lovv, tlat `frame when standing in conveying' position.

l0. i-rmiuing machine including` in combination a lou', i'lat horizontal frame, a cutter chain running about the exterior thereof to cut a bottom hert. a rotatable cutter bar nested Within the frame, means for moving` the rotating cutter bar to cut a cooperatingv herr", and a conveyor entendine from the :liront to the rear of the frame and having' a pusher blade'adapted to liel i'lat and to stand up within the frame when traveling, respectively, in the idle and conveying' directions, the pusher blade projectin above said low, l'lat trame when standing .in kx'liii'ej'ing position.

il. A. niining machine including in combination means for cutting;` a bottom horizontal hert, a rotatable cutter bar nested within said hert cutting' means, means for moving' the rotating cutter bar to cut a cooperating hert, and a conveyor' extending from the front to the rear of 'the machine and having a .pusher blade adapted to lie liat and to stand up Within said bottom hert cutting means when traveling, respectively, in the idle and conveying directions, the pusher blade projecting' above said bottom hert cutting means when standing in conveying' position.

l2. fr mining machine including in combination means for cutting` a bottom horizontal hert, a rotatable cutter bar nested within said herl cutting means, means for moving, the rotating cutter bar to cut a cooperating hert, and a conveyor extending`v from the front to the rear of the machine and having a pusher blade nestingI Within said bottom hert cutting means, a motor mounted on and at the rear of the machine and connections therefrom for driving the bottom herrPv cutter, the rotary cutter bar and the conveyor.

13. Si miningl machine including in combination a low, Hat horizontal frame, a cutter chain running about the exterior thereof to cut a bottom hert, a rotatablecutter bar nested Within the frame, means for moving' the rotating cutter bar to cut a cooperating hert, and a conveyor eXtending' from the front to the rear ot' the frame and having' a pusher blade nested Within the frame, a motor mounted on and at the rear oil thc machine and connections there- 'l'rom lor driving the bottom hertl cutter, the rotary cutter bar and the conveyor.

lll. A mining machine including' in combination means for cutting a bottom horirontal hert, a rotatable cutter bar nested within said hert cutting means, means for n'lovinggthe rotating' cutter bar to cut a cooperating hert, and a conveyor extending trom the front to the rear ot the machine and having a pusher blade adapted to lie liat and to stand up Within saidbottom hert cutting means when traveling', respectively, in the idle and conveying` directions, and means tor imparting reciprocating travel to the pusher blade, a motor mounted on and at the rear of the machine and connections therefrom for driving the bottom hert cutter, the rotary cutter bar and the reciprocating pusher blade traveling means.

l5. A mining machine including in combination a low, flat horizontal frame, a cutter chain running` about the exterior thereof to cut a bottom hert, a rotatable cutter bar nested within the frame, means for moving the rotating' cutter bar to cut a cooperating` hert, and a conveyor extending from the trontto the rear ot 'the fra-me and having a pusher blade adapted to lie ilat and to stand up within the frame when traveling', respectively, in the idle and con veying directions, and means for imparting reciprocating` travel to the pusher blade. a -motor mounted on and at the rear of the machine and connections therefrom for driving` the bottom herf cutter, the rotary cutter bar and the reciproeating` pusher blade traveling` means.

16. A mining machine including` in combination a low, l'lat horizontal frame, a

cutter chain running about the exterior thereoic to cut a bottom hert, a rotatable cutter bar nested just Within and alongside one of the sides of the trame, means for moving' the rotating` cutter bar to cut a cooperating hert, and a conveyor extending' from the -liront to the bach of the frame and located Within the cutter chain and having; a pusher blade adapted to lie down and to stand up within the frame when traveling, respectively, in the idle and conveying directions, and means for imparting' reciprocating' travel to the pusher blade, a motor mounted en and at lthe rear of the machine and connections therefrom for drivinp` the bottom hert cutter, the rotar)v cutter bar and the reciprocating pusher blade travelingmeans. Y

i7. A mining machine including in combination, a low, flat horizontal frame adapted to slide upon the ground and to entera herl', a cutter chain running' about the exterior of the frame to cut a bottom hert of suilicient size to receive the frame, conveying` means Within the frame and extending from the liront ol the lrame longitudinally thereof to the rear and extending' outwardly just above and beyond the bach VoiI the frame, and a motor mounted on said frame to drive said cutter chain and said conveying means.

18. A n'iinine; machine including` in combination, va low, llat horizontal frame adapted to slide upon the ground and to lili lil

enter the kerf, a cutter chain running about the exterior of the frame to cut a bott-om hert` oi" a size to receive the frame, and conveying mea-ns within the frame comprising a loor extending from the front ot' the irame rearwardly just over and beyond the back of the frame and the cutter chain, and means for pushingdislodged coal along said floor, and a motor mounted on said frame to drive said cutter chain and said conveying means.

19. A. mining machine including in combination, a low, liat horizontal frame adapted to slide along therground and to cnter a hert, a cutter chain running about the exterior of the frame to cut a bottom korf adapted to receive the frame, conveying means within the frame and comprising a licor extending from the front oi the frame rearwardly, just over and beyond the back oi' the frame and the cutter chain, means including a traveling pusher blade 'l'or pushing dislodged coal along said floor, and a motor ymounted on said frame to drive said cutter chain and said conveying means.

20. A mining machine including in combination, a low, fiat horizontal frame adapted to slide upon the ground and to enter a hert, a cutter chain running about the exterior or" the frame to cut a bottom hert to receive the frame, conveying means within the frame and comprising a floor extending from the front otl the frame rearwardly just over and beyond the back of the frame and the cutter chain, and means including a reciprocable pusher blade traveling` nearly the entire length of said floor for pushing dislodged coal along said door.

2i. A mining machine including in combination a low, flat horizontal frame, a cutter chain running about the exterior of the trame to cut a bottom hert, and conveying means within the vframe and comprising a loor extending "from the -front of the i'rame rearwardly just over and beyond the back of the :trame and the cutter chain and means including a traveling reciprocable pusher blade for pushing dislodged coal along said floor.

22. A mining machine including in combination a low, fiat horizontal trame, a cutter chain running about the exterior of the trame to cut a bottom hert, and conveying means Within the frame and comprising a iloor extending from the front of the frame rearwardly just over and beyond the back of the frame and the cutter chain and means including a pusher blade traveling reciprocably nearly the entire length of said floor for pushing dislodged coal along said floor...

23. A mining machine including in combination a low, flat horizontal frame, a cutter chain running about the exterior of the frame to cut a bottom hert, and conveying means within the frame and comprising a floor extending from the front ot the frame rearwardly just over and beyond the back oi' the iframe and the cutter cha-in and means including a traveling pusher blade adapted to lie down when traveling idly and to stand up for pushing dislodged coal alorVr said' ig ioor. y

24. A mining machine includingin combination a low, flat horizontal frame, a cutter chain running about the exterior ot the frame to cut a bottom hert, and` conveying means within the frame and comprising a floor extending from the 'front of the trarne rearwardly just over and beyond the baci; of the frame and the cutter cliainand means including a pusher blade traveling nearly the entire length of said Yfloor adapted to lie down when traveling idly and to stand up for pushing dislodged coal along said door. j

25. A mining machine including in combination a low, llat horizontal frame, a cutter chain runnino' about the exterior oli the *frame to cut a bottom lcri', and conveying means within the frame and comprising a floor extending from the front of the frame rearwardly over and beyond the back of the trame and the cutter chain and means including a traveling reciprocablepusher.

blade adapted to lie down on its idle reciprocation andto stand up for pushing dislodged coal along said tloor.

26. A mining machine including in combination a low, tlathorizontal frame, a cutter chain running about the exterior ot' the frame to cut a bottom kerf, and conveying means within the frame and comprising a floor extending from the front ont the frame rearwardly just over and beyond the back of the frame and the cutter chain and means including a pusher blade traveling reciprocably nearly the entire length oi sa floor and adapted to lie down on its idle reciprocation and to stand up iorpushi-ng dislodged coal along said floor.

27. A. conveyor mechanism comprising a bottom supporting the material to be con-l veyed, a pusher blade, means for traveling it along the bottom, and means for varying the extent oit its travel.

28. A conveyor mechanism comprising a.

lll() lOS ually operable means for varying the eX- telit of its travel.

31. A conveyor mechanism comprising a bottom supporting the material to be conveyed, an upwardly projecting pusher blade` means for traveling it along the bottom, and means for farying the extent ot its travel.

239.. A conveyor mechanism comprising a bottom supporting the material to be conveyed, an upwardly projecting pusher blade, means for 'traveling it to and tro along the bottom, and means for varying the extent ot its travel.

33. A conveyor' mechanism comprising a bottom supporting the material to be conveyed, an upwardly projecting pusher blade, means `for traveling it along the bottom, and manually operable means for varying` the extent of its travel.

34. A conveyor mechanism comprising` a bottom supporting the material to be conveyed, an upwardly projecting pusher blade, means for traveling1 it to and tro along the bottom, and manually operable means for varying the extent of its travel.

A conveyor mechanism comprising a bottom supporting the material to be conveyed, a rising and falling pusher blade, means for traveling it along the bottom, and means for varying the extent ot its travel. 7

36. A conveyor mechanism comprising a bottom supporting the material to be conveyed, alrising and falling pusher blade, means for traveling it to and'tro alolxgtlie bottom, and means for varying the extent of its travel.

37. A conveyor mechanism comprising a bottom supporting the material to be couveyed, a rising and falling pusher blade, means for traveling it along the bottom, and manually operable means for varying the extent oi' its travel. V

3S. A conveyor mechanism comprising a bottom supporting the material to be cong veyed, a rising'and falling pusher blade, means tor traveling it to and tro along the bottoni, and manually operable means for varyingI the extent oli' its travel.

3l). A conveyor mechanism comprising a bottom supporting the material to be conveyed, an upwardly projecting, rising and falling pusher blade, means tor traveling it along the bottom, and means tor varying the extent ot'its travel.

40. A. conveyor mechanism comprising a bottom supporting the material to be con veyed, an `upwardly projecting, rising and falling pusher blade, means for traveling it to and tro along the bottom, and means for varying the extent of its travel.

n Ll1. A conveyor mechanism comprising a bottom supporting the material to be conveyed, an upwardly projecting, rising and falling pusher blade,` means for traveling it to and tro along the bottom, and inannally operable means tor varying the eXf tent of its travel.

In testimony whereof, I'have signed my name to this specification;

RICHARD PEALE.

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