US1127395A

US1127395A - Mining machinery.

Info

Publication number: US1127395A
Application number: US59103110A
Authority: US
Inventors: Charles O Bemies; James F Bemies
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-11-07
Filing date: 1910-11-07
Publication date: 1915-02-09
Anticipated expiration: 1932-02-09

Description

o. o. a; J. P. BEMIES.

MINING MACHINERY.

APPLICATION FILED NOV. 7. 1911")V 1,1 27,895. Patented Feb. 9, 1915.

4 SHEETS-SHEET 1.

WITNESSES:

i ,erro/mfr C. 0. & J. F. BEMIISS.

MlNING MACHINERY,

APPLICATION FILED NOV. 7, N10.

Patented Feb. 9, 1915.

4 SHEETS'SHEHT 11 AINVENTOHJ WITNESSES:

TTOR/VFY the full width of the chamber in UNITED STATES PamENT ormoni CHARLES 0. BEMIES, OF MCCLELLANDTOWN, PENNSYLVANIA, AND JAMES FIBEMIES, OF NEW YORK, N. Y.

MINING MACHINERY.

Application filed November 7, 1910.

To allai/10m t muy concern Be it known that we, (1) CHARnns nnins and (2)'JAMES F. Bmrms. citizens of, the United States, residing at (l) Mc- Clellandtown and (2) New York, in the counties of (1) Fayette and (2)- New York and States of (l) Pennsylvania and (2) New York, have invented certain new and useful Improvements in Milling Machinery. of which the following is a specification.

This invention relates tomining machines. and more particularly to the class of ma` chines which are used for mining coal, and especially bituminous coal.

The objects of this invention are, to vide a mechanism that will undercut the coal the full width of the chamber, `in one continuous Yoperation and convey the coal cut to a point of discharge at the extreme rear of the machine, in one continuous and endless combined cutter and conveyer; to construct a machine which will undercut the coal so that it can be easily sheared or sliced down the full width of the chamber and combine with such undercutting and conveying mechanism a shearing down mechanism which will shear down the coal one stroki` of the piston: to construct a machine which will shear down the coal the full width of the chamber, in predetermined and uniform sections of length; to construct a machine in which thc combined undercutting and conveyingr yand shearing down mechanism is fed against the face of the coal at the same time, all parts remaining in the same relation to each other and always feeding in the cutting direction, and attached to the same frame or support; to construct ay machine wherein no one mechanism has to be moved out of the way of another mechanism, all parts moving in the direction of the work at Iall times.

Further objects will appear from the detail description in connection with the accompanying drawings, in which Figure 1 is a side elevation of a machine embodying this invention, Fig. 2 is a plan. Fig. 3 is a verticalA longitudinal section, parts being shown in elevation, Fig. 4 is a section .on line 4 4 Figs. 1 and 3 parts being shown in elevation and the shearing down mechanism being removed. Fig.l 5

is a detail rear elevation showing the mecha`I Specification of Letters Patent.

pro l regular thickness, width and` ratentedrszjejam. Serial No. 591.031. 4

, msm for feeding the machine againftiie face of the coal. Fig. 6 is a detail side clvation showing similar mechanism. Fig. 7 is a detail elevation of the shearing down mechanism the cutter being shown in different positions. F ig. 8 is a plan of Fig. 7. Fig. 9 a detail section on line 9-9 Fig. 7 Fig. 10 is a diagrammatical view showing one of the cutters, its motor, feeding mechanism and controlling means. Fig. 11 is a diagrammatical view showing the multiple unit cutter and controlling mechanism. Fig. 12 is a detail showing'the controller in ay different position, and Figs. 1,3 and 14 are sections showing the forms of rooms which can be cut. y

Previously in mining coal Vby machinery w here the blasting 'is eliminated, the coal has to be undercut fora certain distance by some form of undercutting mechanism. The most common form being a cutter-chain, that is, a chain with cutters attached which travels across the face of the coal usually a section at a time, until the proper depth has been cut. u This leaves the cut coal spread along the oor of the chamber and has to be removed by hand, and is a waste product. After undercutting the coal the undercutting mechanism has,l to be drawn back to make room for a conveyerto collect the coal broken down into it and the coal thus broken down is conveyed to point of discharge by transferring once or twice, making two or more different conveyers necessary before it reaches a point of ,iiscliarge. The conveyers also have to be shifted from side t0 side of the chamber as each section is cut. After nndercutting, the coal is broken down into the conveyor by a breaking down mech anism, the most common forni consisting of a drill or punch, although in some cases, a saw or a class of cutters similar' to the undercuttingr chain is used. The method usually followed .is to drill the coal full of holes, this being waste product, and then breaking the coal down by separate means in irregular and uneven shapes. In some cases the drilling is omitted, and the coal is punched down, which also lea ves the coal uneven and irregular in shape. These methods consume considerable time in lost motions, by moving one device out of the way of another device, and produce a great amount of dust and 'waste product. and uneven shapes.

It is to overcome the objections of the previous machines that this new and novel mining machine is invented.

The machine herein described first undercuts the coal *with a` new combined cutter and conveyor, wherein the cutters are mounted upon conveyer flights, and to distinguish this new form of cutter from the common form of cutter-chain, we will call it a cutter conveyer and will so use the term in future explanation of the undercutting device. This cutter conveyer not only undercuts the coal but conveys the coal undercut to a point of discharge, on cars or other conveyances, at the extreme rear of the machine, in one continuous operation as the cutter conveyer is endless. The shearing down mechanism is decidedly novel in that it .shears or slices the coal down in predetermined and uniform' sections of regulated thickness. width and length, with a minimum amount of dust and `waste product for the maximum amount of lcoal sheared down. The undcrcutting and shearing; down mechanism are combined in one frame and the entire frame is fed forward. The machine being fed forward as a unit, obviates the necessity of one operation overlapping another or of moving one mechanism out of the way of another. The machine and all its different mechanisms aln ways feeds in the direction of the cut or t0- ward the face of the coal.- This machine comprises many new and novel features over the previous forms of machines in that it mines the coal and conveys it to lcars in a minimum number of operations, saving time, labor and material, besides mining the coal in desirable .hapes With these ends in view the machine will now be described so that any one skilled in the art can understand its operation.

Thai machine comprises' a frane made up of ,structural steel the main side members of which are designatedl by 20. and which are suitably braced by cross tie and strut members as shown in the drawing. The frame is supported by a pair of flanged wheels 21 and a toothed roller 22. The wheels are supported by the rails 23 of a track which rest upon cross ties 24 on the floor of the room, the track being preferably provided with spurs 25 which prevent rearward movement of 'the track and the machine when in place thereon. The shaft 26 for the vwheels has mounted thereon. a spur wheel 27 which meshes with a` rack 28 on the crossties 24 for the purpose of feeding the machine against the face ofthe coal. A driving motor 29 is supported on the frame so as to move therewith and transmits power by means of chain and pulleys 30,31 to a main shaft 32. The motor is preferably an electric motor and takes its'power from a trolley or third rail as is common in miningpractice, but it may as wel] be another type of motor, for instance, internal com- `sprocket 36 which is connected to a sprocket 37 on shaft 26. A sliding clutch 38 operated by a handle 39 is arranged to connect

shafts

32 and 33 so that the gear 27 is driven from the main shaft 3Q to feed tbe entire frame and the parts connected thereto forward and backward, the reversal of direction being accomplished by simply reversing the motor. ln this construction the gear 27 and sprocket 37 are rigid with shaft 26, it is obvix us however that they may be mounted on a sleeve or bushing loosely on the shaft. The toothed roller engagesthe floor of the room directly and is restrained against backward movement by a pawl 40 which engages the teeth. The roller is preferably in sections as shown and near each vend a row of teeth are omittedl so that the roller can engage the track the teeth on each side forming the flanges.

The undercuttng -mechansm.-A pair of conveyer troughs 43 extend rearwardly and upwardly and are supported at theirifront end on the main frame and at the rear by posts 42. These convcyer troughs comprise a bottom and sides the outer sides of which stop or are cut off at 44. and beveled as shown. The bottoms 45 also stop or are cut off at 46 near the front of the machine. The inside walls extend from theV rear to the front and merge into a front wall 48 which extends across the front of the machine, the corners where the walls merge being rounded as shown in the drawings. AY cutter con veyer 49 of the chain or link type slides in the trough and is provided with flights 50. Some of the iiights are provided with cutters 51 for the purpose of undercutting the coal in a manner hereinafter to be described. Rollers 52 are mounted on the fiights and. bear against guides 53 and 54 on the frame, the guides 52 and 53 merging to form rounded corners as shown in the drawings. The conveyer is endless and passes over a sprocket or driving wheel 55 which is provided with teeth to engage the rollers 52 on the flights. This wheel is mounted upon a shaft 56 having a worm wheel which meshes with a worm on shaft 57, the worm and wheel being mounted in the casing 58. The shaft 57 is driven by

bevel gears

59 and 60 on the

shafts

57 and 32 respectively. The conveyer troughs discharge at the

points

61, 61 into a chute 62 which delivers the coal to suitable vehicles or another conveyer. Since the troughs are cut off at the front end as sliown at 44 and 46, the cutters project be- 116 is an exhaust pipe. A pipe 117 is con nected with a cylinder 113 and the main 103 and is provided with two valves 1.18 and 119 the stems of which are. connected by a link 120. A branch pipe 117u connects 117 with the right hand end of cylinder 77, and valve 118 is normally open while 119 is normally closed, so that the right hand end of cylinder 77 is normally connected with cylinder' 113 but normally disconnected from main 103. A pipe 121 is connected to the lower end of cylinder 113 andis connected by another pipe 122 to a valve casing 123. This valve casing is provided with an exhaust port 121 and a rotatable valve 125 provided with recesses 126. The shaft of this valve has mounted thereon a ratchet wheel Y127 adapted to be engaged by a pawl 128 on a pawl carrier 129 swinging about the valve shaft as an axis. The tail 130 of the pawl carrier is adapted to be engaged by the teeth on a wheel 131 on shaft 87 to opcrate the pawl carrier in one direction. and

Y clutch member 91 is in the form of a sleeve a spring 132 moves the'pawl carrier in the opposite direction. The return movement of the pawl carrier as its tailsnaps past the teeth is steadied and dampened by a dash pot comprising a cylinder 133. a piston 134 connected to the paw] carrier and a regulating valve 135 in the cylinder. The left piston rod is provided with a groove or port adapted to aline with a port 136a connected to pipe 1.37 and with the upper end of the cylinder when the pistons are in their lowest position. A branch pipe 138 leads from pipe 137 to a port 138I in the valve casing 123. A second branch 139 connects with a pipe 140 leading to a cyinder 141 provided with a piston 142 which is connected to a lever 143 pivoted on the frame. T he lever is adapted to shift the clutch member 91 into and out of engagement with the coperating clutch member 91 on shaft The splined on the shaft of the worm 90. and carries a brake. cone 144 which. is adapted to coperate with`a stationary brake cone 145 on the Worm g. spring 146 normally throws the bra'. ci. into engagement. A valve 147 is located in the branch 13V' ind the stem 148 of this yah e is adapted to he shack by a pin 149 on, the wheel 131 so as to move the valve to closed position when the wheel has been moved a predetermined number of steps. A main supply pipe 140" is connected to pipe 140 and is provided with a valde 140b which is normally closed. A pipi.l 150 connects the pipe 122 with the main 102 and b v a branch pipe 151 with the left hand end of the cylinder 77. Valves 152 and 153 Y are located in the pipe 150, and valvtl 152 is normally open while 153 isnormally closed, so that pipe 122 is normally connected with the left end of cylinder 77, while both the left `end of cylinder 77 and pipe 122 are normally disconnected from main 103. The

valves

152 and 153 areeonnected by a link 154 so that they can be controlled in unison. The

pipes

112 and 137 are provided With

hand valves

155 and 156 for a purpose hereinafter to bde ribed The right cylinder is provided above port 111"l with an exhaust port 157. The ports and passages in both cylinders and pistons are preferably duplicated so that the parts will be interchangeable, but only one set need be provided for one cylinder. In this way the ports in one cylinder and piston control one mechanism while those in the other cylinder control another mechanism.

The operation will now be described.

Suppose the parts are in the position shown in Fig. 10,

valves

118, 152. 147, 155 and 156 being open, and valves 119. 153, and 140b being closed. If now motive fluid such as compressed air is admitted to main 103. this air will How into cylinder 77 bf ween the heads of valve 101. and from thence to the lower ends of cylinders 7 3a through pipe 105 driving the pistons outwardly on their working stroke. As the pistons come to the end of their working stroke, port 111 will aline with port 111'l so that the air will be admitted to pipe 112 and to the upper end ot' cylinder 113 driving the piston valve 114 down, the air below the valve exhausting through pipes 121 and 122 to exhaust 124. This movement of valve 11-'1 will cause pipe 112 to be connected with the right end of cylinder 77 through pipes 115, 117 and 117%, thereby driving the piston valve 101 to the extreme left as shown in Fig. 12. the air at

thef

151, 150 and 122 to exhaust 124. This movement of piston valve 101 will connect the lower ends of the cylinders 732l with the eX- haust pipe 104 and the upper ends with the inlet main 103. so that air is admitted through pipes 107l and 108 to thc upper ends ol cylinders 73i1 to drive the pistons 100 and the cutter head back. As the pistons near the end of their return stroke, the groove or port 13G will connect tie port 1368L with the `ipper end of the left cylinder so that air is admitted to the rear o piston 142 through pipes 13T. and 14o, port 138a icing at thisl time closed to the exhaust This will cause the piston '142 to be driven outward to release brake lil-4 and clutch 01 with 91a. against the tension ci spring 14-6. The worm 90 will now be driven from shaft 32 thereby rotating! shaft 87 and drums S6 to wind up cables 8l and 82 so as to raise or 'leed the cutting mechanism vertically. The rotation of shaft 87 and the `toothed wheel 1?.1 thereon will cause the teeth on the wheel to more the pawl carrier 129 and then allow it to snap over and be released so that the spring 132 pulls the pawl carrier down to rotate the valveI one step.y One step in this i? case is a movement of the succeeding recess 126 in the valve disk 125 to the position oc cupi v, he preceding one. During this movement the port 138Il will be connected to the port 122' to connect pipe 137 with the left end of cylinder 77 through pipes 138,

122 and 151, and with the bottom of cylin der 113 through pipes 138, .122 and 121. Since the upper end of cylinder 113 is now connected with the exhaust pot 157 piston 114 will be driven up. ,'Ihismovement of piston 114 will connect the right end of cylinder 77. with the exhaust pipe 116 so that the piston 101 is drivenA to the right to osition shown in Fig. 10 by the pressure rom pipe 151. This movement of the piston 101 will again connect the pipe 107 and the rear end of the cylinders 73a with the exhaust pipe 104. The cylinder 141 is then also con nected with the exhaust so that the spring 144 will release clutch 91 and apply brake 144 to stop the feedingl movement ofthe cutting mechanism. The parts are so timed that by the time the valve disk 125 has been moved lto a new position the piston valve 101 has been moved back to its original position to connect the upper ends of cylinders 73E, and cylinder' 141` with the exhaust and the lower ends of cylinders 73 with the supply main, so that the'parts are in position to start another series of operations, the cutting mechanism being fed step by step at the end of each backward stroke of the cutter head. After the cutting mechanism has been fed a predetermined number of steps.l

e., has reached the roof the pin 149 engages the arm 148 to close the pipe 140 and -cvlinder 141 to the pipe 139 and open it to the exhaust pipe 147. This pin 149 is preferably adjustable so that the position where the feeding is to be stopped can be varied. This can be accomplished by providing the wheel with a series of holes 149a in any one ot' which the pin can be inserted.'

The cutting mechanism can be let down in the following manner: The valve 147 is placed in dotted position where it was left by the pin 149. valve 14.7.in exhaustpipe 147 is closed and pawl carrier 129 lifted So that the tail 130 will liar the teeth on the wheel. The pawl carrier can be he.d in raised position by closing valve 135. The valve 140b 'is then opened slowly so as to release brake This will 144 but not to close clutch 91. cause the cutting mechanism to be lowered by gravity the brake by a slight engagement preventing sudden movements. Or the valve in pipe 103 may be closed and valve 140b opened to release brake 144 and clutch 91 and the motor 29 may then be reversed to lower the cutting mechanism.

It is sometimes desirable to reciprocate the cutter without feeding it. This may be accomplished as follows t-

Valves

155 and 156 are closed, and 147 is moved to dotted position. The valve in 103 is then opened so that air will be admitted to the lower ends of cylinders 73a to drive the pistons therein and the cutter head forward. Link 120 is then moved to open valve 119 and close 118 causing the piston 101 to be driven to the left thereby connecting the lower ends of cylinders 73a with the exhaust pipe 104 and the upper ends with the main 103 so las to drive the pis-tons and cutter head back. By again operating link 120 in the reverse direction the pistons are again driven out ward. The pistons and cutter head can thus -The connection between the main and supplemental controller cylinders and the pf wer cylinders of the units will be obvious from Figs. 11 and 12, and similar parts have been designated by similar reference characters as in Fig. 10, and the parts of the separate units by similar reference characters distinguished by the exponents a, 1), and c. In order however to permit the center cutter head to start its cutting stroke before the others the branches 105B and 105c are provided with valves 162 and 163 and

pipes

164 and 165 lead from the cylinders of the center unit and connect with pipes A and 105c beyond the valves 162 and 163. ports of

pipes

164 and 165 are so locatedp the cylinders of unit that they are not u l reverse the cutter, until all the pistons and cutter heads of all the units are at the end of their forward or working stroke. This is accomplished in the following manner: The end supplemental cylinder 113 of the unita only is connected with pipes V11,7 and 116, and

thc cylinders

113, 113, and 113c are connected by pipes 116, 116 and pipes 160 and 161 which are located as shown in Figs. 11-and 12. It will be seen that thepipe 117 is not open to thefair pressure from pipe 112' The or any other pressure strokes as shown in Fig. 12, and this will not happen until power cylinders are at the end of their forward or working strokes. Air cannot therefore be admitted to the right of cylinder 77 to move piston 101 to the left so as to reverse any of the maincutter pistons until all these cutter pistons are at the end of their cutting strokes. The above mechanism therefore provides means for insuring that all the cutter pistons shall be at the end of their cutting stroke before any of them are reversed. The above operation is accomplished by providing one main controller' the reversing action of which is controlled by a series of supplemental control- 1ers one for each and governed by each cutter motor. The feeding action of the cutter mechanism and the other detail operations of the mechanism will be the same as in theconstru'ction shown in Fig. 10 and further description will therefore be unnecessary. 'lhe pipe 137 may hovvever in this case have only one branch 137aL for the left cylinder of unit a, or it may also have branches 137" and 137c leading to the left cylinders of units and c.

In Figs. 11. and 12 the parts are shown diagrammatically in order to show the connections. In the actua` machine however the cylinder 7 7 well as the cylinders 113 are secured to and carried by the main or cutter cylinder 73a. This is shown in the other figures.

In the complete operation, the cutters of the shearing downniechanism are placed in the position shown in Fig. 3 and the valve in the main 103is closed to throw these cutters out of operation. The motor 29 is then started to drive the main shaft 32 and drive the combined conveyer and undercutting mechanism. The clutch 3S is then thrown in to feed the entire machine against the face of the coal to undercut the same as shown in Figs. 1 and 3, the cut coal being: conveyed to the chute 62 by the conveyer flights. After the coal has been suilciently, undercut, the clutch 38 is disengaged to stop the feeding of the machine, the conveyer however beingl kept running. The valve in the main supply pipe 103 is now opened to start the shearing down mechanism in operation. The cutters will be driven against the face of the coal, and after each return stroke, the cutter' is automatically fed or raised so as to be placed in position to shear down another layer. The coal :1s-sheared down falls into the con veyer and is discharged into the chute 62. After a predetermined number of cuts have been taken, the feeding mechanism is automatically thrown ont of operation. In this way the machine can be started and it will not stop until the entire face pipe until all the pis-' 'tons 114, 1141, 114C are at the bottom of their all the pistons in the mainv `it carries its own power plant, and is so c from Hoor to ceiling has been sheared down. During the shearing down operation the machine is restrained against luickwaray movement by the engagement of the gear 37 with rack :28. the worm preventing rev se iv?. movement of gear 37, and by pavvl locked roller 22 engaging the floor, and by a locking member engaging the roof. This locking member comprises a toothed member 170 pivoted at 171 on one of each of the sta nd-l ards 70, and pressed into engagement with' the roof by a spring 17 The guideways on he standards incline rearwardly, so that the cut fico of the coal will also incline. It is found that the shearing down operation is very much easier when the face is so eut. The outside limits of the shearing down cutters are located inside the limits of the undercutting mechanism. The material can therefore be more s easily sheared down at its outside limit since it will overhang at the outside breaks. The relative limits are shown in Figs. t7. and 13 where the lines y, y, represent the outside limits of the shearmg down mechai'iism. 1t 9o will be seen that the lirst cuts are on a .slant as shown at X'Fig. 3. In this man-ner the she-firing down of the first layer rendered @asien In the multiple unit construction the f' tral cutter starts in advance of the cutie-i on either side. rThe entire multiplo un utter will therefore act as la Wedge,` Wheeby the strain is thrown on the frame gradu- Illy instead of suddenly. The control mechanism is so constructed that the pi m one cutter cylinder of a unit controls e reversing or supplemental controller, while the piston of the other cylinder controls i step by step feeding mechanism.

The machine is entirely self contained as lo?.

structed that it can at any time be ei automatically or manually controlled. f machine is very {ieXible in its operation and control which is of greatadvantage in mur no ing Work.

The units of the shearing down mucha nisin can he so arrangeiil that it can rift either :l [lat roof as in Fig. 125 ,or a cox roof as in Fig. 1l. This latter ronstruf. may be obtained by mal-:ing the ,idd-rstandards and guides higher than the om side standards. The construction c," cutter heads is such that the con? cui: -V sheared down clear to the ceiling. i@ .in

Although a multiple unit cutting mecha nism described, it Will be obvious that a single unit cutter may be used. The she: ing down cutters may also be used as an er dercutting mechanism by plac. tin: cui in the position shown in F 21 and if a then reciprocating the cutters back an* forth Without feeding the sarm by manipulating the links or 154 as fmy describe` The strokes can be regulated so to long or short in order to perform this un'- dercutting operation, th timing being 'reguy e opera-tion of the a edge above the cylinder, said cutter-head lated by the timing of links. In this way the coal can be undercut to prepare it for the shearing down operation. The undercutting ,mechanism may therefore be dispensed with, in which case it is however necessary to provide another form of conveyer or else remove the broken down coal by hand. It is prefer-I able however to ,use the combined undercutter and conveyer in connection with the shearing down mechanism in the manner described.

The combined cutter and conveyer chain is shouf'nrdescribed, and claimed in our copending application Ser. No. 591032 filed Nov. 7, 1910.

Having thus described the invention what is claimed is as follows 1. In a mining machine the ccmbination with a frame or support, an upright standard on said frame, a shearing down mechanism movable verticaly as a whole on and guided by said standard, and a combined undercutter and conveyor projecting from the lower section of said standard for conveying .away `the .coal cuttings, and the coal sheared down.

2. In a mining machine the combination with a frame or support, a standard on said frame, of shearing down mechanism thereon,

means for feeding. said frame toward the face of the coal, and a spring-pressed shoe attached to the standard'engaging Ythe roof at the front f said frame to prevent backward movement of said frame.

3. In a mining machine the combination with a frame or support7 a rearwardly inclined standard on'said frame, of shearing down mechanism movable on and guided b v lsaid frame, means for reciprocating saidy shearing down mechanism forwardly and,` rearwardly, a motor for mov-ing said 1'1echa,\` nism on said frame, a clutch fonsaid motor whereby said mechanism may be stopped on started at intervals as it is raised, and means for feedin said sheatging down mechanism upwardgly at the end of each .rearward stroke and made to travel rearwardly as it is raised.

4. In a mining machine the combination With a frame or support, of a guideway thereon. a cross-head 0n said guideway, and a shearing down mechanism supported by said cross-head, said shearing down mechanism comprising a cutter-head and a pair of pistons and cylinders arranged on opposite sides of said guideway, said cutter-head carried by .and connecting said pistons. v- 5. In a mining machine-the combination with a frame or support, of a guidevvay thereon, a cross-head on said guideway, and a shearing down mechanism supported by Mid cross-head, said shearing down mechanism comprising a pair ofeylinders, pistons therein, and a cutter-head having its cutting carried by and connecting said pistons.

6. In a mining machine the combination with a frame or support, of a guideway thereon, a, cross-head on said'g\1ideway,and a shearing down mechanism supported by said cross-head, said shearing down mechanism comprising a pair of cyiinders. pistons therein, and a toothed cutter-head having its cutting edge above the cylinder', said cutter-head carried by and connecting said pistons.

7. In a mining machine the combination with a frame or support, of a guidcway thereon, a cross-head on said guidcwav, a shearing down cutter pivotally i on said cross-head at its from; und. to swing about a transverse f and a stop for the rear end ot' sau., c: said cross-head.

'8. In a mining machine the mnibination with a frame or support, of a ruidewajf thereon, a cross-head on said guideway, a shearing down cutter pivotally supported on said cross-head at its front end, and means for supporting said cutter in a horizontal position for certain limits and in inclined positions for other limits.`

A9. In a mining machine the combination with a frame or support, of a guideway thereon, a cross-head on said guideway, a shearing down cutter pivotally supported on said cross-head at its front end, means for supporting said cutter in a hmizmnftalv posi.- tion for certaimlimits, and a stop on said guideway to variably incline said cutter as it approaches its lower limit,

l0. In a mining machine the conxl'iination with a frame or support. of a guideway thereon, a cross-head on said guideway, a shearing down cutter pivotallv supported on said cross-head at its front cud, means for adjustably supi'iorting said cutter in a horizontal position on said guideuay, and meam for supporting said cutter in lunixoutal and inclined positions on said guideway.

11, In a mining machine the combination with a frame or support. ofk a, guideway thereon, a cross-head on said guideway, a shearing down cutter pii otally supported on said cross-head at its front end, means for adjustably suppdrting said cross-head and the rear end of said cutter, and moans on said guidewav for supporting said cutter in a variabhr inclined position as it apinoaches its lower limit.

1Q. In a miningr machine the combination lost motion connection, and a stop on said guideway for the rear end of said cutter to variably incline said cutter as it approaches its lower limit.

13. In a mining machine the combination with a frameor support, of a guideway thereon, a cross-head on said guideway, a shearing down cutter pivotally supported on said cross-head at its front end, cables connected to said cross-head and the rear end of said cutter, the connection to the rear end of said cutter providing for a lost motion, and a stop on, said guideway for the rear end of said cutter to variably incline said cutter as it approaches its lower limit.

14. In a mining machine the combination with a frame or support havingA an upright guidcway, of a shearing down cutter mounted on said guideway, means for raising the cutter on said guideway, means for reciprocating said cutter forwardly and rearwardly, and means for feeding said cutter upwardly at the end of each rearward stroke.

15. In a mining machine the combination with a frame or support having a guideway, of a shearing down cutter mounted on said guideway, means for raising said cutter in the guideway, means for reciprocating said cutter forward and backward, braking means for holding said cutter in position, and means for releasing said brakingmeans to permit feeding of said cutter upwardly at the end of each backward Stroke.

16. In a mining machine the combination with a frame or support having an upright guideway, of a shearing down cutter mounted on said guideway, means for raising said cutter in the guideway, means for reciprq'- eating said cutter forward and backward, means for operating said raising mechanism to feed said cutter along said guideway, and means operable-at the end of each backward stroke of said cutter for setting said cutter raising means in operation.

17. In a mining machine the combination with a frame or support having an upright guideway, of a shearing down cutter mounted on said guideway, means for raising said cutter in the guideway, means for reciproeating said cutter, means for operating said raising mechanism to feed said cutter along said uideway, means for holding said cutter' in po ition, and means operable at the and of each backward stroke of said cutter for releasing said holding means and for setting said cutter raising means in operation.

18. In a mining machine the combination with a frame or support having an upright guideway:i of a shearing down cutter mounted on said guideway, a fluid operated motor for reciprocating said cutter forward and backward, Huid controlled means for raisin said cutter insaid guideway, fluid controlle devices for holding said cutter in position on said' guideway, and means for releasing said holding devices and for setting said ralsing means in operation at the end of each backward stroke of said cutter.

19. In a mining machine the combination with a frame or support having a guideWay, of a shearing down cutter mounted on said guideway, means for reciprocating said cutter, means for feeding said cutter step by Astep and means for throwing said feeding means out of operation after a predetermined number of feed movements.

20. In a mining machine the combination with a frame or support having a guideway, of a shearing down cutter mounted on said guideway, meansfor reciprocating said cutter, means for feeding said cutter, means for holding said cutter in position on said guideuay. ani. intermittently operable ycontrolling inea; for said feeding and holding means to release said cutter and feed it step by Step, and means for throwing said controlling means out of operation after a predetermined number of steps.

21. In a. mining machine the combination with a plurality of shearing down cutters, of motors for operating said cutters in the same direction, means cooperating with said motors to make one cutter Vbegin its cut in advance of the adjacent cutter, and means to return all cutters simultaneously after all the cutters have completed their cut.

22. In a mining machine the combination with a plurality of shearing down cutters, of motors for operating said cutters, and means to coperate with the motors and control said cutters so that an inside cutter begins its cut i-n advance of the cutters on each side of it..

'23. In a mining machine the combination with a plurality of shearing down cutters, of motors for driving said cutters, said motors comprising pistons and cylinders and ports therefor, Said cylinders, ports andpistons so arranged that the piston of one cylinder controls a port of another and adjacent cylinder, and the piston-and attached cutter of one cylinder begins its stroke and cut before the cutters of the other cylinders.

24. In a mining machine, the combination with a plurality of shearing down cutters, of motors therefor, each motor having a cylinder, port, and a piston, the piston of one of said motors controlling the port of another and adjacent motor, a single controller for all of said motors, and means to cause one of the motors to start its stroke in advance of another.

25. In a mining machine the combination with a plurality of shearing down cutters, of motors therefor adapted to reciprocate. said cutters, a main controller for governing both the main and reverse strokes of each of said motors, and supplemental reversing controllers one for each pair of motors.

26. In akmining machine the combination with a plurality of shearing down cutters, of motors ther-etmadapted to reciprocate said cutters, a main controller for governing both the main-and reverse strokes of each ofsaid motors, and supplemental'reversing controllers one for cach pair of motors adapted to govern the mainpcontrolle in reversing said mctois.

:57. in a. mining machine the combination with a plurality of shearing down cutters, means for reciprocating said cutters .forward and baclurard, and means cooperating with said reciprocating means whereby all of Said cutters go to the end of theinforward stroke before any of them are revesed or returned on their backward stroke. In a mining machine the combination with a plurality of shearing down cutters, of means for reciprocating said cutters forward and backward, said means being constructed and arranged Vwhereby one cgtter begins its forward stroke or cut in advance of another, and means coperating with said reciprocating means whereby all of said cutters go to the end of their forward stroke before any of them are reversed or returned on their backward stroke.

29. In a mining machine the combination with a plurality of' shearing down cutters, of

motors for reciprocating the cutters forward and backward, and reverse controlling means cooperating with said reciprocating motors wherebyall of the cutters go to the end of their forward strokes before any of them are reversed or returned on their backward stroke.

30. In a mining machine the combination with a plurality of shearing down cutters, of motors for reciprocating said cutters, a main controller for all of said motors, and a sup plemental controller connected to the for ward end of each motor governing said main eontrolier and' constructed to insure that all cutters go to the end of their forward strokes before any of them are reversed.

3l. In a mining machine the combination with a plurality of shearing down cutters, of motors for reciprocating said cutters, a main controller for allcf said motors, and a supplemental controlling device for eachA motor connected to the forward end ofeach motor, said devices being constructed to insure that all cutters go to the end of their forward strokes before any of them are reversed.

32. In a` mining machine the combination with a plurality of shearing down cutters, of Huid pressure motors for reciprocating said cutters, a main controller for all of said motors having a cylinder and a piston, a supplemental controller cylinder for each motor, pistons in said cylinders, and connections between said supplemental controller cylinders and to said main controller cylinder and also to the forward end .of each motor constructed to connect said main cylinder with a source of fluid supply when the pistons in the supplemental cyllnders are 'in a predetermined position.

33. In a mining machine the combination with a frame or support and an upright 1 guideway thereon, of a shearing down cutter on said guideway, a multiple unit motor for driving said cutter, means for feeding said cutter step by step, means cooperating with one unit of said motor for operating with a frame or support and a guideway thereon, of a shearing down cutter on said gudeway, a main drivingA motor, means .for feeding said cutter on said guideway, 'a clutchffor connecting said feeding means to said n'iotor, a brake for said feeding means, and lmeans for releasing saitbrake and closing said clutch. I

3 n a mining machine the combination witha' frame or support having a guidewny, of :i slearing down cutter thereon, means for operating said cutter, automatic 'means for feeding/said cutter at the end of each operation ott-'thc cutter, and manually controlled lor throwing said automatic means out of operation and for operating said cutter at will without feeding the same.

37. In a mining machine the combination with a frame or support, of aA guideway thereon, a shearing down cutter on' said guideway, means for operating said cutter, means for feeding said cutter step by step along said guideway, means for locking said cutter on said guideway, means for releasing said feeding and locking means, after a certain number of cuts are made, and means .to move the cutter back to original position.

In a mining machine the combination with a frame or support, of a guideway thereon, a shearing down cutter on said guideway, means for operating said cutter, means for feeding said cutter step by step along said guideway, and for releasing said feeding means, after a certain number of cuts are made, and means to moviev the cutter back to original position. Y l

39. In a mining machine the combination Awitha frame or support, of cutting mecha.-

nism, thereon, means forcontrolling said mechanism to cause it to undercut the goal, me' i for controlling said Y,mechanism to cas f it to shear down the coal, and means for feedinq ,if mechanism step by step during th" s; ring down operation.

L10. 1I: a mining machine the combination with a or support, of cutting mechanier;v .2.hez'eon, means for feeding said mech- :mism step by step, means for throwing said feeding r* -f`nanism out of operation and for eperating .leid cutting mechanism as an undercutting mechanism, and means for throwsaid feeding mechanism into operation to operate said cutting mechanism as a shearing down mechanism.

In testimony whereof I ax my signature in presence f two witnesses.

CHARLES 0. BEMIES. Witnesses OLIVER HOSTETLER, THOMAS G. CHmsToPHER. In testimony whereof I aix my signature in presence of two witnesses.

' JAMES F. BEMIES. 1Witnesses:

EIL. CARTLETT, E. W. SMnH.