US1675902A - Obgan - Google Patents

Description

July, 1928.

E. c. MORGAN MINING AND LOADING APPARATUS July 3, 192s. 1,675,902

E. C. MORGAN MINING AND ,LOADING APPARATUS original Filed Oct-'24.1921 5 sheets-sheet 2 5, Sheets-Srieet 3 'E. C. MORGAN MINING AND LOADING APPARATUS Original Filed Oct. 24. 1921 n@ uw 1% July 3, 192s.

July 3, 1928.

E. c. MORGAN MINING AND LOADING APPARATUS original Filed oci. 24. 1921 5 Sheetsheet 4 .July` 3, 1928.

E. C. MORGAN MINING AND LOADING APPARATUS Original Filed out. 24. 1921 5 Sheets-Sheet 5 vwentoz mi www, 5

S04/Wem Patented July 3, 1928.

UNITED STATES PATENT oFFicE.

EDMUND C. FIOR/GAN, OF NEWYORK, N. Y.; OLIVE EUGENIE MORGAN EXECUTRIX OF SAID EDMUND C. MORGAN, DECEASED. y

MINING AND LOADING APPARATUS.

Application filed October 24, 1921, Serial No. 509,981. Renewed November 28, 1927.

Fly invention relates to mining and loading apparatus wherein the main frame is held stationary While the dislodging mechanism operates to mine coal -from an upright mine Wall for delivery to loading apparatus in position to receive it adjacent the place of dislodgement. and one of the objects of the invention is the provision of simple inrproved apparatus of this character to elliciently mine and load coal directly from a coal mine vein. A further object of the invention is the provision of improved operating mechanism `for that type of dislodging` means Which comprises dislodging tools Whichare rigidly connected to a supporting frame to move bodily therewith.

Another object of the invention is the provision ot automatic limit stop mechahisin `for the feeding and restoring apparatus ol the 'dis-lodging n'iechanism.

yA further object of the .invention is the provision of a system of hydraulic anchoring piiaratus partieularly adapted for that type of mining machine in which the main frame is held stationary While'the supplemental frame is moved relatively thereto to carry bodily therewith;digging 'and splitting tools.

Utlierobjocts of the invention will appear heA latter, the novel features and combinations being set forth in the appended claims.

ln the accompanying draWings-- Fig. 1 a plan View of my improved min'- ingj machine and a part of the loading apparatus; i

2 is a central longitudinal Sectional View of Fig. 1; v

Fig. 23 is a plan View of the complete mining' and loading machine;

Fig. 'Li a sectional elevation taken on the line lmet Fi g. 3 looking in the direction arrows; 5 is au elevational View of the mining oailing niachinesliown in Fig. 3, with the. wall jacks' omitted;

'7 a sectional detail of the'connection between the forward conveyor and the side conveyor of the mining and loading machine g Fie. 8 is a sectional detail view taken on the line 8 8 of Fig. 1 looking in the direction of the arrows;

Fig. 9 is a sectional elevation on the line 9--9 of Fig. 3 looking :in the direction of the arrows; Y

Fig. 10 is a sectional View taken on the line lO-lO of Fig. 1 looking in the direction of the arrows;

Fig. 11 is an enlarged detail vieW of the releasing means for the pavvl and ratchet seen that to the rear end of the main frame 16 is connected an electric motor 17, the shaft of which carries a worm 18 which is in mesh With the Worm gear 19. As shown in Fig. 9, the motor shaft 20 is keyed to the Worm 1S `and the Worm gear 19 is integral with the gear 21, and both the Worm gear 19 and the gear 21 are mounted on the vertical shaft 22, Which in turn is mounted on the main frame. As shown in Figs. 1 and 2, the gear 21 meshes with the large spur gear 23 which is keyed to the vertical shaft 24 journaled in suitable bearings 25 and 26 in the main frame 16. Secured to the upper end of the 'shaft 24 is an eccentricl 27 for ope-rating the feeding means of the dislodging mechanism hereinafter described. i

1 The forward bottom portion 28 of the main frame is curved, as shown in Fig. 24, to facilitate-sliding 'of the machine over the mine floor. Above the forward base portion 29 of the main frame is a cylinder 30for receiving the plunger 31 of a hydraulic roof jack for anchoring the main frame. This hydraulic roof jack comprises a shoe 32 having an upper serrated surface 33 and a `lower bowl-shaped bottom 34 fitting into the dishshaped recess 35V in the upper end of the plunger 31. Y Y

The cylinder 30 is provided with a cylindrical outer surfaceto serve as a supporting standard and also as a cylindrical bear-` ing for the hub l36 of the arm or supplemental frame 37 to which the dislodging The hub 36 is provided on its upper peripheral portion with ratchet teeth 38, as shown in F ig. 1. Surrounding the ratchet teeth is a ring 39 which carries a series of pivoted pawls 40 preferably extending ap proximately entirely around the hub 36..

The pawl and ratchet mechanismI is shown in detail in Fig. 11. The pawls' 40 are pivoted to the ring 39, the same being spacedapart and Aarranged in series almost entirely around the ring 39. These pawls are each urged by its spring into engagement with the notches between the ratchet teeth, as shown iny F ig. 11. lhen the ring 39 ytogether with the pawls carried thereby is oscillated back and forth by means of the eccentric 27 the pawls 40 willy move the hub 36 in feeding direction when the ring 39 is moved in a clockwise direction, and when the latter is retracted the pawls 4() will be permitted by the springs 41 to ride over the ratchets into the .next notches.

By referring to Figll it will be seen that the ring 39V is lprovided with a rearwardly extending yoke 42 which is provided with a rectangular opening- 43, the sidewalls of which are engaged by the plate 44, at the center of which is located the eccentric 27. Therefore when the motor 17 is operated to rotate the eccentric 27 inan anti-clockwise direction. as viewed'in Fig. 1, the plate 44 will be moved back and forth in the rectangular opening 43 in the yoke 42. At the same time the plate 44 will be'oscillated laterally which will effect oscillation of the yoke 42 and the ring 39, and when the latter is oscillated the pawls 40w`ill be moved forwardv and backward to effect continuous for-` ward rotation, step by' step,vof'the hub 36 and therefore of the arm 37 and the dislodg` ing mechanism this arm.

In order to lock the arm 37V against retro! grade movement when the pawls 40 are retracted a spring-pressed' pawl 45 is mounted on thel standard 46 which is secured atw47 to the main frame 16. as shown in Fig. 2. This spring-pressed pawl 45 is similar in construction to the spring-pressed pawl 40 shown in 11. but sincethe pawl 45 is mounted substantially on the main frame it mounted on the outerfend of r acts as an abutment to prevent retrograde movementrof the ratchet ring 36 after the latter has'been moved forward a step.

They dislodging mechanism is shown in Figs 3.5 and 6 secured to the outer end of the armV 37 by means of the bolts 48 and 49. The dislodning mechanism may therefore be adjusted .radiallyL to various positions along the arm 37 relativeto the upright central axis of Ithe bearing standard 30. This adjustment may be effected by loosening the bolts 48 and 49 shown in Figs. 3 .and'5 and manually sliding the splitting tool.' frame along the arm 37 after whichr the bolts 48 penetrating and splitting tools 51, 527 that designated 51 being located at the floor, and that designated 52 being located midway between the iioor and root in' advance of the Hoor dislodging device 51. Intermediate the dislodging tools 51 and 52 are piercing tools 53 for the purpose of trimming ofi' the ragged wall left by the main splitting tools. At the floor are additional trimming piercing implements 54 secured rigidly to the Jframe 50.

' At the upper portion of the frame 50 are spaced-apart rearwardly extending arms 55 andv 56, as shown in Fig. 3. To the rear ends of these arms and between the same is pivoted at 57 an arm 58 which carries at its outer end the roof splitting tool 59. Se-

, cured to the arm 58 are roof trimming .the arm 61 in adjusted position relative to the arm 58. After the arm 58 has been moved to adjusted position the bolt the head of which is shown at 64 in Fig. 3 may be used in connection with the nut 65 to hold this arm in adjusted position. However. it is preferred to provide a hydraulic motor 66 comprising a. cylinder with a piston 67 therein and a piston rod 68 connected by a link 69 to the arm 58 for adjusting the elevation of this arm and locking it in adjusted position.

Secured at 70 to the arm 58 .is an arcuate guide 71 which is adapted to iii-,ove along the arcuate' guideway 72 tor reinforcing the dislodginrr tool 59. Mounted on the arcuate bar 71 are wall trimming devices 73. as shown Fig. 6.

Connected at 74 to the arm 37 is a spring 75 adapted to engage an overhangino: down ward extension 76 from the plate 77 which is mounted on top of the hub 36 and pivotH ally connected at 78 to the upper end of the cylinder 30. The plate 77 is ot sudicient diameter to extend over a portion oi" the rino. 39, as shown in Figs. 1 and 2. The plate 77 is connected by a plurality of spaced-apart pin and slot connections. as shown at 70, 80 and 81 in Fig. .1. These pin and slot connections may each be constructed as shown in 13 and 14. A bolt 82 is secured to the rine 39 and pro.- vided with a collar 83 so that a washer 84 may rest on the loop-shaped seat 85. The collar 83 may be `s mided along the slot 86 and the friction between the washer 84 and the seat 85 regulated so that the plate 77 may have a circumferential sliding movement relatively to the ring 39.

Therefore when the spring tripping device engages the abutment 76 the plate 77 will be moved circumferentially relatively to the plate 39 a distance equal to the length of the slot 86 in the plate 77.

This circumferential movement of the plate 77 to a limited extent relatively to the ring 39 is for the purpose of operating a series of cams 87, one of which is shown enlarged in Fig. 11.` These cams are located on the bottom of the plate 77 in spaced relation corresponding to the respective pawls 40, there being also a similar cam 87 for the pawl 45 shown in Fig. 2. Each of the pawls 40 and the pawl 45 is provided with a lever as shown at 88 in Fig. 11. These levers are secured to the pawls and extend upwardly into the cams 87. Therefore when the plate 77 is automatically shifted upon the dis' lodging mechanism reaching the limit of its feeding movement, the levers 88 are operated to throw the pawls out of engagement with the ratchet teeth and thereby free the arm 36 for restoring movement in reverse direction to initial position.

W'hen desired all of the pawls may be thrown out of engagement with the ratchet teeth by means of the lever 89 shown in Fi 1 which is secured to the plate 77, as shown in Figs. 1 and8. 'IVhen the plate 77 is shifted circun'iferentially relatively to the ring 39 as permitted by the pin and slot connections 79, and 81 the spring-pressed pin 90 is forced out of its notch 91, and upon'reaching the notch 92 will snap into the same to hold the plate 77 in iti-i shifted position so that the pawls 40 will remain in Areleased position during the return of the arm 37 to initial position. By moving the lever 89 in the opposite or clockwise direction the pin 90 may be moved back into the notch 91, whereupon the pawls will be restored to and held in their ratchet engaging positions.

In order to return the arm'37 together with the dislodging mechanism mounted thereon to initial position after such dislodging mechanism has completed its stroke of approximately 1803, power driven mechanism is provided by mounting a gear wheel 93 at the lower end of the hub 36, as shown in Fig. 2, and connecting to this gear wheel 93 a pinion94 which is connected to the motor 17 by a train of gearing. As shown in Fig. 2, the spur gear 94 carries` a beveled gear 95 which meshes with another beveled gear 96 which is connected to theV forward end of the shaft- 97. As shown in Fig. l0, this sha-ft 97 is keyed to a worm gear 98 which is located at the rear portion of the main frame 16, as shown in Fig. 1. MeshH ing with the worm gear .98 is a Worm 99 on the vertical shaft 100. At the lower end of this shaft 100 is a spurgear 101 which meshes with the large gear 23 to receive power therefrom. As shown Vin Figs. 1, 9 and 10, a clutch 102 is mounted on the shaft 97 so as to connect the gear 98 to the shaft 97. It can readily be seen by referring to Fig. 10 that since the gear 98 is loose on the shaft 97 the throwing in of the clutch 102 will transmit power from the gear 98 to the shaft 97 and. thus effect rotation of the arm 37 ina clockwise direcf tion through the train of gearing comprising the beveled 95 and. 96 and the spur gears 94 and 93. In order to automatically stop the restoring movement imparted to the arm 37 I have provided a cross-rod 103 in position to be struck by the arm 37 when the latter `reaches its initial position. This cross-rod 103 is pivoted at 104 to a bell crank lever 105 which is pivoted to the main frame 16 at 106. A rod 107 connects the bell crank lever 105 to the clutclielement 102. It will thus be seen that the clutch may be movedv toV releasedv position eitherby means of the handle 108 or by means of the arm 37 automatically engaging' the` rod 103.V

The loading apparatus comprises an endless conveyer 109 which has spaced-apart fiights 110 adapted to travel over the semicircular ring receiving plate 111, as shown in Figs. 1 and 3. The forward edge of the plate 111 may be beveled, assliown at 112, and this semi-circular ring plate may be hinged to the sides of the base 29, as indicated at 113 in Fig. 5, andthe upright cylindrieal surface 114 provided as a bearing' for the sprocket chain 115. This sprocket chain meshes with a sprocket 116 at the bottom of the vertical shaft 24, as shown in Fig. 2. Therefore when the eccentric 27 is driven anticlockwise, the flights 110 will be moved eircumferentially along the receiving plate 111 toward the receiving end of thelateral conveyer 117, as shown in Fig. 3. The forward lower end of the conveyer` 117 may be inclined downwardly at 118 'and then extended horizontally at 119 to the forward beveled edge 120, as shown in Figs. 3 and 7. The rearward extension on the horizontalY flat portion 119 may be provided at 121 and a portion of the inclined scoop of the conveyer provided with a hinged seetion 122 for permitting the` fiights 110 to readily pass under such hinged section. The edges of the flights 110 are beveled, as shown at 123 and 124, so that when the flights 110 ride over the plate 122 they may readily pass under the hinged section 122 and cause the lower end of the latterto scrape the material off the flights and thus keep such material from .passing rearwardly with: the fiights.

The conveyer 117 may be o-f the endless chain scraper type comprising a stationaryv ed on brackets 127 and 128 hinged at 129 and130, respectively, to one side o-f the motor and one side of the main frame 16. Suit able lugs` may be provided for holding the brackets 112i' and 128 in horizontal position, as shown in Fig. 4. The brackets 127 and 128 are detachable and the conveyer 117 removable when desired. Additional. support to the' conveyor 117 may also be given by the Wall jack 131 which is hinged at 132 to the ears; 133 extending from one side of the motor 17- In addition to the Wall jack 131 other Wall jacks. such as those designated 134 and 1351, may be provided. The horizontal hydraulic jack 134 is pivoted at 136 to ears extending rearwardlyv fromY one corner of the motor frame.k The horizontal hydraulic jack 135 is pivoted at 137 to ears extending from a lateral intermediate portion of the main frame. The horizontaly hydraulic jacks 134 and 135 are also provided with roof jacks 138 and 139, respectively,V as shown more clearly in Fig. 15. The. hydraulic jack 135 may he located inthe dotted line position 140, as shown in Fig. 3, When the entire inaohine is to be movedk forward to a new location, but when the dislodging mechanism is being operated the hydraulic jack 135 may be moved to the position shown in fulllines in Figl 3 to act as a Wall jack. The hydraulic jacks 131,v 134 and 135v cooperate with the forward roof jack 32 to hold the framework Y of the'mining machine securely in stationary position during the operationV of the dislodging mechanism.'

Y As shown in Fig.9,'. they upper end of the vertical shaft is Providedv with an ec'- centric cam'141 for engaging the eccentric strap 142 Which is connec-tedto the plunger 143-jof a hydraulic motor 144 for pumping liquid from the tank 145 into the pressure supply pipe 146.

Fig. 15 represents more or less diagrammatically rthe system of hydraulic circuits and connections and the control mechanism therefor. When the pump plunger 143 is reciprocatedby the mechanism shown in Fig. 9, liquid may be drawn from the tank 145 and forced into the pressure supply pipe 146 in accordance with the control permitted by the check valves 147 and 148. .By means of the-valve 149 the hydraulic jack 131 may be operated to Wall-engaging position or retracted therefrom. The valve 149 may also be moved to such position as to lock the Wall jack 131 in its adjusted position.

By means ofthe valve 150 the hydraulic jack134 may he given horizontal movement-s, but it should be noted that the connections are such thatV when pressure is directed into the horizontal cylinder the roof jack 138 is at the same time moved tol anchoring position. lVhen the valve 150 is in the position shown in Fig. 15, the pressure supply pipe 1.46 is connected to the cylinder 134 to the right of piston 152. lVlien the valve 150 given a quarter turn to the right by means of the levcr153, the pressure pipe 151 is connected to the cylinder 134- tcv the left of the piston 152 and the pipe 154 is connected te the pipe 155 which leads to the exhaust pipe 156. Therefore the roof jack 138 may be released and moved toward thcright to a' newV position when desired.

In a similar manner the valve 157 may be actuated to control the operation of the wall jfacli and the roof jack 139.

By means of the valves 158 and 159 the hydraulic motor on the dislodging mecha* nism may be operated to adjust the position of the arm 58 and lock the latter in adjusted position.

By means of the valve 160 hydraulic presmay be directed into the cylinder 30 through-thc passage 161 to move the plunger l irfliy so that the shoe 32 will engage the roof. When the 7alvc 1GO is in thc position shown in Fig.` 15, the cylinder 3() is connected to the exhaust pipe 15G. but when the lever 162 given a quarter turn to the right the pressure supply pipe 146 will be connected to the cylinder 30. When (his occurs the pressure medium will flow from the pipe 163 into the cylinder 164 of the accumulator 1657 the latter comprising a plunger 163 having a collar 16T engaging a strong spring 168. It is preferred to include the accumulator 165 in the system bccause the operation of the dislodging tools may cause slight vibra tions tending to effect a yielding of the roof or floor to the pressure oi the forward roof jack. lVhen this yield ing action tends to take place the accuniulator will immediately act to cause the plunger 31 to move the required distance to maintain the desired anchoring actionI even though the valve 1GO may be moved to such position to lock the plunger 31 .in its roof-engaging position. Y

At the rear end of the motor frame is cured an upright floor jack 169, as shown in Fig. 5. By referring to Fig. 15 it will be sccn that a valve controls the operation of this licor jack either to lift or loxvcr the rear end of the main frame on the curved bottom 28 as a fulcrum. lhen the inclination of the machine has been adjusted h v means of the floor jack. the valve 1T() may be moved to such a position that the piston 171 in the cylinder will be locked in adjusted position, after which the plunger 172 may slide over the mine floor and act as thc rear support for the miningand loadingmachine.

I claim:

' 1. In a mining machine, the combination with a main frame, of a supplemental frame mounted thereon for swinging relatively thereto on an upright axis, a radial'arm on said supplemental frame, dislodging mechanism carried by said radial arm for bodily movement therewith in position to operate on the upright solid face of a coal vein, and power transmission mechanism between said main and supplemental frames comprising a circular ratchet and a multiplicity of pawls distributed around the same to swing said supplemental frame on said upright axis to effect the operation of said dislodging mechamsm.

2. In a mining machine, the combination with dislodging mechanism, of a frame for supporting the same, a plurality of pawl and ratchet devices for feeding said dislodging mechanism, oscillatory mechanism to operate said pawl and ratchet devices, and means for Vrendering inoperative at will said pawl and ratchet devices.

3. In a mining machine, lthe combination with dislodging mechanism, of a plurality of pawl and ratchet devices for operating said dislodging mechanism, means for operating said pawl and ratchet devices to effect feedingof said dislodging mechanism, and manually operated means for releasing the pawl and ratchet devices to permit restoration of said dislodging mechanism to initial position.

4. In a mining machine, the combination with a main frame, of a supplemental frame mounted thereonto swing relatively thereto, dislodging mechanism mounted on said supplemental frame to move bodily therewith and comprising vspaced-apart penetrating wedging tools adapted to penetrate the solid coal face of a mine vein and split coal therefrom in large pieces, pawl and ratchet mechanism comprising an arcuate ratchet and a multiplicity of spaced-apart pawls distributed along the same for powerfully feeding said dislodging mechanism by swinging movement of said supplemental frame relatively to said mainframe, and oscillatory means for operating said pawl and ratchet mechanism to effect such powerful feeding of said dislodging mechanism.

5. In a mining machine, the combination with a main frame, of a supplemental frame mounted thereon for swinging movement relatively thereto, dislodging mechanism mounted on said supplemental frame to move bodily therewith and adapted to penetrate the solid face of a mine vein and split large pieces of mineral therefrom, a driven shaft, an eccentric mounted thereon to rotate therewith, and means comprising a multiplicity of spaced-apart pawls connected between said eccentric and said supplemental frame for swinging the latter to effect the operation of said dislodging mechanism.

` 6. In a mining machine, the combination with a main frame, of a supplemental frame mounted thereon for arcuate movement relatively thereto, dislodging mechanism mounted on said supplemental frame in position tooperate on an upright mine wall while said main frame rests on the mine floor, a ring separate from said supplemental frame, pawl and'ratchet mechanism between said ring `and said supplemental frame, and means for oscillating said ring to operate said pawl and ratchet mechanism to transmit feeding movement to said dislodging mechanism.

i 7. In a mining machine, t-he combination with a main frame, of a supplemental frame mounted A"thereon for swinging movement relatively-thereto on an upright axis and comprising a circular hub, dislodgingmechanism mounted on said supplemental frame to move bodily therewith and comprising a penetrating and wedging tool adapted to act dn the solidV coal face of the mine vein and split large pieces of coal therefrom over a wide area by av continuous forward movement, oscillating driving mechanism, and slip clutch mechanism comprising a multiplicity of distributed pawls between said driving mechanism and said hub to effect step-by-step forward feeding movement of said dislodging mechanism.

8. In a mining machine, the combination with supporting framework, of dislodging mechanism comprising a clawlilre penetrating and wedging tool adapted to enter the solid face of the coal vein and split large pieces of coal from the unmined mass by a continuous forward feeding movement along an arcuate path of travel, and power transmission mechanism comprising a ratchet)y and a multiplicity of spaced-apart pawls for feeding the dislodging mechanism while said supporting framework remains stationary to secure a powerful continuous forward movement of said claw-like penetrating and wedging tool.

9. In a mining machine, the combination with a main frame, of a supplemental frame mounted on said main frame for arcuate movement relatively thereto, dislodging mechanism mounted on said supplemental frame for movement therewith, a tertiary the vsolid" face v of aV coal vein and tearlarge 'pieces of coal from its `native bed, feeding mechanism comprising a multiplicity ofppawl :and ratchet devices distributively connected to said dislodging mechanism, means on said framework for driving said feeding mechanism, and means for holding said framework stationary while said dislodging mechanism is operated lb v power distrilautively transmitted through said pawl and ratchet devices.

l1. ln `a mining machine, the combination with a main frame, fof a supplemental frame mounted on said main frame for arcuate movement relatively thereto, dislodging mechanism adapted to operate on the upright solid face of- 'a mine vein, mean-s for mounting said dislodging mechanism on said supplemental frame for :movement tl'ierewith horizontally in advance lof .said mainframe while connected'thereto for continuous engagement with the upright face of the icoal vein during feeding movements continuously forward through :an angle of about 1800 from one side of the'sa-ird main frame to the other, and means comprising 'widely distributed 'clutch mechanism `for imparting step by step forward movements 'to said supplemental frame to operate :said dislodging mechanism while said .main frame remains stationary.

l2. ln a mining` machine, :the combination with ya main frame, rof la supplemental frame mounted thereon to swing relatively thereto, dislodg'ing mechanismen said supplemental frame in posit-lento actwonfthre upright'face of 'a `coal vein horizontally in :advance of :said main frame, means vcomprising multiplicity Vof dis-tributed lpawl and ratchet devices for imparting `a continuons forward feeding movement to said supplemental frame by frequent increments to t'operate said dislodging mechanism, and means for prevent-ing retrograde movement of said dislodging mechanism 'after increments of forward movement thereof.

'In a miningl machine, the combination with supporting framework, .of dislodging mechanism mounted thereon in position to operate on the upright working face ofacoal vein, a luralit v of distrihuted pawl and ratchet devices Vfor feeding said dislodging mechanism, os-cillatorv mechanism, means on Asaidy framework for operating said `oscillatory mechanism to eifect the 'feeding of said -d'islod ging mechanism, and means operable as a unit 'for rendering inoperative rat will all of said pawl and ratchet devices to free 'said dislodgingmechanism for return to initial position.

la. In :a mining machine, the combination with aI supporting frame adapted torest Fon and slide over a mine floor, of dis-lodging novatos' mechanism mounted thereon in position to operate on the upright face of a coal vein in advance of said frame. a plurality of distributed pawl and ratchet devices for operating said dislodging mechanism, means for operating -said pawl and ratchet devices to eiiiect feeding of said .dislodging mechanism, and means for simultaneously releasing all of .said pawl and ratchet devices to free said 'dislodgiuguiech-auism for restoration to initial position.

l5. In a mining machine, the combination with dislodging mechanism, .of pawl and ratchet mechanism comprising a plurality of distributed pawls, means Ifor operating said pawl and ratchet Amechanism to efiect feeding lof said dislodging mechanism, and means comprising a plurality of cams-one associated with each of said pawls for rcleasing all of the rlatter b v a single operation.

16. In a mining` machine, the combination with dislodging mechanism, of means comprisingr pawl and ratchet mechanism for feeding said dislodging mechanism. said pawl and ratchet mechanism, a plurality of spaced-apart ldriving pawls and a retaining pawl all in engagement with the same ratchet, and means'comprising a plurality of Acams one for each Iof said pawls to release the latter to permit restoration of the dislodgi-ng mechanism,

17. In a mining machine, the combination with supporting frame, of mining mechanisml mounted thereon for operation ou an upright mine wall in advance of said flame, pawl and ratchet mechanism for feeding said' mining mechanism, andA limit stop mechanism for a-uto-maticall),v releasing said pawl and ratchet mechanism to permit restoration yof said mining mechanism vto initial position.

"18. A1n `a mining machine, the combination with 'a supporting frame, of dislodging mechanism mounted 'thereon in fixed relation therewith for opera-tion on an upright mine wal-l in advan-ceof sai-d frame, step by step clutch mechanism for imparting powerful 'feeding movement Ato said dislodging mechanism to move the same 4alon g the mine wall parallel to the face thereof, limit stop mechanism for automatically releasing said clutch mechanism to free said dislodging mechanism for restoring movement to initial posit-ion in readiness for anothcroperation on the uprightmine wall, gearing for eifecting a `quick restoring movement ofvsaid dislodging mechanism to initial position, and additional limit stop `mechanism for automatrcally discontinuing the transmission of power through sai d gearing.

19. In `a mining machine, the `combination with :a :supporting frame, of dislodging mechanism mounted thereon in position to operate on an upright mine wall horizontallvfin advance of said frame, means for Vfeoding said dislodging mechanism comprising a ring, clutch mechanism Within said ring for transmitting step-by-step feeding movement to said dislodging mechanism While preventing retrograde movement thereof, and means for actuating said ringr to secure such feeding movement for the dislodging mechanism to act on the upright mine Wall in advance of the machine and While the latter is supported on the minefloor.

20. In a mining and loading machine, the combination with a supporting frame having a rounded bottom at its forward end portion to facilitate sliding over the mine iioor, of dislodging mechanism mounted on said frame for arcuate movement on an upright axis and in advance of said frame, a conveyer connected to the forward end of said frame for yielding engagement With the mine floor, means for operating said dislodging mechanism to dislodge material to he received by said conveyer, and means for sliding said frame over the floor While said conveyer is in yielding engagement therewith.

In testimony whereof I have signed my name to this specification on this 22d day of October, A. D. 1921.

EDMUND C. MORGAN.

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