US1514269A - Mining machine - Google Patents

Description

Nov- 4 9 H. R. STRAIGHT MINING MACHINE Filed Avril 11, 1922 4 Sheets-Sheet 1 Nov. 4 4- 1,514,269

H. R. STRAIGHT MINING MACHINE Filed Anril 11, 22 4 Sheets-Sheet 2 Nov. 4 1924.

H. R. STRAIGHT MINING MACHINE 'Filed April 11, 1922 4 Sheets-Sheet 5 r0 I, r///- Nov. 4 1924. 1,514,269

H. R. STRAIGHT MINING MACHINE Filqd Abril 11, 22 4 Sheets-Sheet 4 Patented Nov. 4, 1924.

HALVERCR. STRAIGHT, OF ADEL, IOWA.

MINING MACHINE.

Application filed Aprill 11, 1922.

To all whom it may concern:

Be it known that I, HALVER R. STRAIGHT, a citizen of the United States, residing at Adel, in the county of Dallas, State of Iowa, have invented a certain new and useful Mining Machine, of which the following is a specification.

This invention relates in. particular to mining machines for mining comparatively hard substances.

The object of my invention is to provide a mining machine of simple, durable and inexpensive construction adapted to automatically mine and deliver a comparatively hard material to suitable cars.

further object is to provide an automatic mining machine adapted to mine and remove a comparatively hard material in small chunks of a comparatively uniform size and provided with means whereby the average size of the chunks may be considerably varied.

A further object is to provide a machine adapted to automatically mine a material from under-ground and from a tunnel or entrance or rectangular cross section, the vertical and horizontal dimensions of which are greater than the transverse dimensions of the machine.

)i further object is to provide in a min ing machine, an improved head provided with a series of pneumatic or electric chisels which may be utilized to cut the material loose, and so arranged and controlled that a cut of uniform depth may be made substantially across the entire surface from which the material is removed.

There are other objects which may be apparent to those skilled in the art, and which need not be enumerated here in detail.

My invention consists in the construction, arrangement and combination of the various parts of a device, whereby the objectscontemplated are attained as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Figure 1 is a plan'view of my improved mining machine with a portion of the rear end broken away.

Figure 2 is a longitudinal sectional view taken on the line 2-2 of Figure 1.

Figure 3 is a front elevation of the device showing the manner in which it is mounted in the tunnel formed by the cutters.

Serial No. 551,696.

Figure at is a detailed sectional view taken on the line 14 of Figure 2 illustrating the control mechanism for the cutters.

Figure 5 is a detail sectional view of the same taken on the line 5-5 of Figure 4.

Figure 6 is a detail sectional view taken on the line 6-6 of Figure 1.

Figure '7 is a plan detail sectional view taken on the line 77 of. Figure 2.

Figure 8 is a detail plan view of the lower portion of the main elevating conveyor, together with a segment of the transverse conveyor.

Referring to the accompanying drawings, I have used the reference numeral 10 to indicate a track, on which my improved mining machine is mounted. The'machine com prises a supporting frame having side members 11 and 12, and transverse members 13, upon which the members 11 are mounted. The members 13 are provided with bearings 14: which are secured to short longitudinal members 15.

Rotatively mounted in the bearings 14 are shafts 16, each of which are designed to carry flanged wheels 17, the said wheels being designed to engage the track 10.

The rear end of my machine is provided with a transverse member 18 rotatively in which is mounted. an axle 19 designed to carry suitable flanged wheels 20. The members 11 are designed to extend forwardly over the members 13 and are provided at their forward ends with a transverse channel iron 21. The side members 12 are sup,- ported above the members 11 by means of channels 22 and 23. The forward endsof the members 12 are vertically above the forward ends of the members 11 and .are provided with a channel24e similar to the channel 21. The upper sides of the channels 24t'and 21 are provided with a rail 25. The members 22 and 23 are provided with cross members 26 which form braces for the frame work. e V

For advancing this supporting frame, I have provided worm gear 27 on the central portion of the shaft 19, which is designed tomesh with the worm 28 rotatively, mounted in a bearing 29, said bearing 29 being secured to the lower side of the transverse member 18.- Secured transversely ahead of the member 18, I have provided a plate .30,

'the lower side of which is designed to carry a motor 31, the shaft of which is operative- 1y connected with the worm 28. Suitable electric wires 32 are provided which lead to a suitable control of the ordinary construction. By this arrangen'ient it will be seen that by throwing the motor 31 in operation, the worm 28 will be rotated which will cause the worm gear 27 to be rotated and the supporting frame advanced or moved rearwardly, according to which di rection the motor 31 is rotated.

For cutting the material, I have provided a carriage 33which is provided with flanged wheels 34, designed'to rest on the tracks 25. This frame 33 is provided with an opening 35 near its central portion.

The lower left hand wheel, as shown in Figure 1 of the drawings is provided with a rearwardly extending aXle 36 which is mounted in a frame 37. The frame 37 is secured to the back of the frame 33 by means of'bolts 38. A rail 39 is provided transversely across the members 11 and parallel with the lower rail 25. A wheel 40 is provided on the'rear end of the shaft 36 and designed to rest on the rail 39. The central portion of the shaft 36 is provided with a worm gear. 41', which is in mesh with the worm 42', the said gears being mounted in a suitable oil-tight case 43. This case 43 is mounted on the frame 37. a

A motor 44 is mounted on the fram 37, the shaft of which is operatively connected with the worm 42. Suitable electric wires and controllingdevices are connected with said motor, and so arranged that it may be operated in either direction. By this arrangement it will be seen that the frame 33 may be moved transversely across the forward end of the supporting frame by operating the motor 44, the speed of which may be regulated by regulating the speed of the said motor. frame 33, I have provided a vertical slide bar 45, which is secured in position bymeans of guide members 46. The slide bar 45 is provided with forward extending hearing members 47 in which is rotatively mounted a vertical shaft 48. The shaft 48 isp'rovi'ded with a series of diverging and reciprocating cutting members 49. Each of the cutting members 49 is provided with a reciprocating cutter 5O sharpened at its ou-ter 'end. These cutter-s are preferably of the pneumatic type similar to he pneumatic drills of ordinary construction. Each of the cutters 49] is provided with a' supporti-ng'sho'ulder 51 havingan air pipe 52 cast integral, through which air may be admitted for actuating the plunger The pipes "52 are connected by means of a vertical pipe 54'. Mounted in the rear end of the supporting frame, I have provided an air compressor 55 which is of the ordinary construction and maybe driven by any suitable power.

Near each end of the Near the central portion of the frame, I have provided an air tank 56, the said tank being 1n communlcatlon with the compressor by means of the pipe 57. A flexible pipe 58 is provided in communication with the tank '56. One end of the pipe 58 is provided with a Y 59 which is in communication with two pipes 60, each of which communicates with one of the vertical pipes 54. A controlling valve 61 is provided for each of the pipes 60, as illustrated in Figure 3.

By this arrangement it will be seen that T have provided means whereby the cutters 50 may be actuated. that the cutter members 49 are arranged in such a manner that one set of cutters may be actuated as the frame 33 is moved in one direction, while the opposite set of cutters may be actuated as the said frame member is moved in the opposite direction. In this connection it is desirable that one set or battery of the cutters be moved from engagement withthe material while the other set is being operated. For accomplishing this, I. have provided a worm gear 62 on each of the shafts 48, the said worm gear being provided with a support 63 secured to the slide bar 45.

In the said support I have provided a worm 64 mounted. on a shaft 65, one end of which is provided with a bevel-gear 66' and designed to mesh with the bevel-gear 67. The bevel-gear 67 is carried by a shaft 68 which extends through the slide bar 45 and ro-tatively mounted in a bearing 69. The rear end of the shaft 68 is provided with a hand wheel 70. By rotating the said hand wheel the shaft 48 may be oscillated in either direction. By this construction, the points of either set or battery of cutters may be independently moved, to or from the material to be mined, and any desired depth may be maintained as the cutters are operated. The cutters will be rigidly held in position by the construction of the worm gears described.

For moving the slide bar 45 and the cutter 49 vertically, I have provided a rack 71 on the inner face of each of the said slide bars 45. The said rack is designed to be in mesh with the pinion 7:2 mounted on a shaft 73, the said shaft being carried in suitablebearing 74 secured to the back of the frame 33. The opposite end of the shaft 7 3 is provided with a worm gear 75. This worm gear is designed to be operated by means of a worm 76 mounted on a shaft- 71, the rearend of which is provided with a hand wheel 78,

the said shaft and worm being mounted in.

a suitable casing "79 secured to the bearing member 74, as illustrated in Figures 4 and 6 of the drawmgs. By operating the hand wheel 78, it will be seen that the rack bars may be moved vertically relative to the frame 33. For elevating and delivering the It will be noted material, Ihave provided frame members 80 secured to the back and lower portion of the frame 33. Each of the frame members 80 is provided with flanged portions81 designed to form sides ofa conveyor. upper end of the side members 81 is provided with a shaft 82, each end of which has mounted a roller 83. The central portion of the shaft 82 is provided with a worm gear 84. This worm gear 84 is designed to mesh wit-h a suitable worm 85, (Fig. 2). A motor 86 is provided on the frame members 80, the shaft of which is designed to carry a worm 85. By operating the motor through suitable electrical connections, the rollers 83 may be rotated. Near the lower end of the vmembers 81, I have provided a shaft 87 designed to carry rollers 88. On each set of rollers 83 and 88, I have provided a conveyor 89. Each of these conveyors is'provided with slats 90. Each of the conveyors 89 is mounted substantially back of the cutter members 49 the lower ends of which are designed to operate closeto the floor of rivet 93 secured to the back portion of said cutter member and designed to operate in a slot 94 near the forward end of said member 91. The members 91 and 92'are designed to move close to the floor and are so arranged that as the frame 33 is moved transversely on its tracks 25, the saidscraper members will move the material rearward in front of the lower end of the conveyor mem bers 89.

Secured to the forward side of the front member 13, I have provided troughs 95 and 96. These troughs are designed to carry a longitudinally arranged shaft 97, each end of which is provided with a spiral conveyor, 98 and 99, the conveyor 98 being wound in the opposite direction to that which the conveyor 95 is wound. The center portion of the shaft 97 is provided with belt wheels 100. These wheels are formed with spokes so as to permit the material that is advanced forward by means of the conveyors 98j'and 99 to pass through said wheels to the space between them. This space is providediwith an enlarged portion 101 which is designed to receive the material. Extending upward and rearward, I have provided an'inclined chute 102, the lower end of which. is in line with the wheels 100 and the upper end of The l which is provided with a shaft 103 upon which is mounted belt wheels 104. The chute is provided witha bottom 105, the lower end of which has a curved portion 106.

This curved portion is concentric to the tion of the conveyor 107 to move upward adjacent tothe bottom 105. The shaft 103 is rotated by means of a belt wheel 108, which is designed to receive a belt 109, the said belt being driven by means of an electric motor 1.10. the main supporting frame. c

A chute 111 is provided adjacent to the upper end of the'conveyor 107 andzis' soarranged as to receive material delivered thereby and is placed on the supporting frame in such a manner as to convey the material to one side of the supporting frame, the outer end e f which is of such a length that suitable cars may be moved beneath it to receive the delivery 'material.

The conveyors 98 and 99, together with the elevating conveyor 107, are rigidly fixed to the supporting frame, while the convoyors 89 are fixed to the carriage 38, but the upper ends of the conveyors89 are so designed that the material may be delivered to th conveyors 98 and 99 when the carriage 33 is in any of its positions of movement. I

In practical. operation, assuming that a suitable tunnel has been formed in which to start the machine. and the machine is properly mounted, and that the cutters 49 are in the position snown in Figure 1 of the drawings: This figure shows the carriage 33 at its extreme right position. hen it is desired to operate the machine,the points 50 of the left hand battery of cutters 49 are moved in position adjacent to the material to be excavated, while the points of the cutters at the right hand side of the machine are moved rearwardly to prevent them from being dragged against the surface of the material to be mined; position, one of the valves 61 is operated. Thispermits air from the tank 59 to reciprocate the said cutters. The motor '44 is then started, which will cause the carriage 33 to move to the left while the cutters 49 are being operated. After the'cutters 49 have reached the left hand position, the air will be turned off and theniotor 44 stopped, then the left hand cutters will bemoved rearwardly by means of the hand wheel through the bevel-gears 67," 66, theworm gears 64 and 62. The motor 31 is then open ated and the supporting frame 11 is advanced forward, after whichtheright hand battery of cutters 49 may bemoved int-o po- This motor is mounted upon After the cutters 49 :are in sition'adjacent to the material to'be eXca- .vated. In this connection, it will be noted that the distance between the extreme points of both batteries of cutters, is less than one- =half of-the width of the space excavatedby said cutters. when the cutters are at their extreme limit of movement in either direction, to allow the ,cutterwpoints to move to the full depth gradually from the point in which the cutters engage the material to the point midway between the sides of the'tunnel or en--.

trance.

It will be noticed from Fig. 3, that thecutters 49 are so arranged on the shaft 48 in a diverging manner, that clearance may be provided for the machinebctween the extreme top and bottom of the frame, and the bottom and top of the tunnel. In operation, thecutters' will be moved transversely and horizontally across the supporting frame hear, or at their extreme top position of 'IIlOVI11G'-l1li,iflfli6l which they may be lowered by 'means' of the hand wheel 78, and the worm gears 75 and 76, together with the rack 71-and the pinion 73. When the cut ters have been thus lowered, the machine may bereversed and moved across the tunnel'horizontally to the opposite position.

It'will also be noticed that the points of the cutters may be moved vertically at any position between the extreme upper and lower position by operating the hand wheel 78.

I have provided a separate hand wheel for each set of cutters so that they may be raised and lowered independently, to

. meet the requirements of the machine as it is being operated.

As the cutters 49 are operated, the material loosened thereby, will fall to the floor adjacent to the head end of the tunnel when it will be engaged by the scrapers 91 and moved rearward to a point ahead of the ele- -portion 106 and the member 101 and slide the material up the inclined bottom 105 and deliver it to the transverse chute 111, after which it maybe delivered to suitable cars as above described.

' The scrapers 91 are provided with a hinge portion 92 for the purpose of moving rearward and forward with the cutter mem bers 49. The slot 94: is provided to permit the lower cutters 49 to move up and down relative toisaid'hinge portion 92.

This enables the operator,

It will thus be seen that I have provided a mining machine, capable of automatically mining and delivering -material in small chunks to suitable cars. The size of the chunks may be regulated by the amount the supporting frame is advanced forward,,by adjusting the depth of the cutters l9 as they are moved transversely, and. by the vertical adjustment of the cutters.

By properly manipulating the points of the cutters 19, it will be seen that a tapering cut may be formed, as the carriage 33 is moved transversely, so that a curved tunnel or opening may be constructed. It will be seen that by my arrangement of cutters, that a tui'inel with vertical walls and a vertical head may be constructed.

In the drawings I have illustrated the cut ters as being operated by compressed air, but an electric or hydraulic cutter may be substituted for the pneumatic cutters, without departing from the spirit of my invention.

I claim:

1. In a device ofthe class described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, a vertical series of reciprocating cutting devices mounted on, and adapted to cut forward of said carriage,

means for shifting said series of cutting devices vertically and relative to said carriage, and means for elevating and discharging the material removed by said cutters.

2. In a device of the class described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, a vertical series of reciprocating cutting devices mounted on, and adapted to cut forward of said carriage, means for shifting said series of cutting devices vertically. and relative to said carriage, means for swinging the points of said cutting devices transversely relative to the perpendicular movement of said cutters, and means for elevating and discharging the material removed by said cutters.

3. In a device of the class described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction,a vertical series of reciprocating cutting devices mounted on, and adapted to cut-forward of, said carriage, means for shifting said series of cutting devices in a perpendicular plane and relative to said carriage, means for moving the points of said cutting device transversely relative to the vertical'movement of said cutters, means for actuating said cutters,

I and means for elevating and discharging the materlalremoved by sald cutters.

4:. In a device of the class described, a

supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in' 5. In a device of the class described, a

supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, a vertical series of reciproeating cutting, devices mounted on and adapted to cut forward of said carriage,

means for shifting said series of cutting de vices vertically and relative to said carriage,

means for elevating and discharging the material removed by said cutters, comprising a transverse conveyor and a longitudinal elevator on said supporting frame, a longi- 1 tudinal conveyor for each series of cutters on said carriage designed to discharge material into said transverse conveyor, means for driving each of said conveyors, and a scraper for each series of cutters;

6. In a device of the class descr bed, a

supporting frame, a carriage capable of transverse movement von said supporting frame, means for moving said carriage in either direction, a battery of cutting devices mounted on, and adapted to out forward of" said carriage, means for shifting said cut ting devices vertically and relative to'said carriage, means for moving'the points of said cutting devices transversely relative to the vertical movement of said cutters, means for elevating and discharging the material removed by said cutters, comprisinga trans verse conveyor and a longitudinal elevator on said supporting frame, a longitudinal conveyor for each battery of cutters on said carriage designed to discharge material into said transverse conveyor, means for driv-J ing each of said conveyors, and a scraperffor each battery of cutters.

7. In a device of the class described, a.

to cut material when the carriageis moved supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in carriage, means for swinging thelpoints of said cutting devices transversely relative to the vertical movement of said cutters, .means for actuating said cutters, means for elevating and discharging the materialremoved by said cutters, comprising a transverse conveyor and a longitudinal elevator on said supporting frame, a longitudinal conveyor for each battery of cutters on said carriage designed to discharge material into said. transverse conveyor, means for driving each ofsaid'conveyors, and a scraper for each battery of cutters;

8. In a device of the class described, a supporting fraine, agcarriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, a battery of cutting devices mounted on, and adapted to cut forward'of said carriage, means for shifting'said cutting devices vertically and relative to said carriage, means for swinging the points of said cutting devices transversely relative to their vertical movement, pneumatic means for actuating said cutters, means'for elevating and discharging the material removed by said cutters, comprising a transverse conveyor and a longitudinal elevator on said supporting frame, a longitudinal conveyor for each battery of cutters on said carriage designedto discharge material into said transverse conveyor, means for driving each'of said conveyors, and a scraper for each battery of cutters;

9'. In a device of supporting frame, a carriage capableof transverse movement on said supporting frame, means for moving said carriage in either direction, two batteries of cutters,

mounted on, and, adapted to cut forward of said carriage, each of said batteries comprising a vertical series of horizontal and reciprocating cutters,' the cutters of one battery being designed 'to'operatein the opposite direction from'th'os'e' of the other, one of said batteries being adapted to cut material when the carriage is moved in one directiomand the other adapted to'operate when the carriage is moved in the reverse direction,and means for actuating said cutters, W

10. In a device of the class described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, batteries ofcutters mounted on,'and adapted tocut forward ofjfsaid carriage, one of said batteries beingfadapted in one direction and the other adapted to operate when the carriage ismoved'in the reversedirection, means for actuating said cutters, and independent means for moving the class described, a

Ill)

'riage is moved in one on, and adapted to cut forward of said carriage, one of said batteries being adapted to cut material when the carriage is moved in one direction and the other adapted to operate whenthe carriage is moved in the reverse direction, means for actuating said cutters, independent means for moving each battery of cutters transversely relative to the movement of said carriage, and inde pendentmeans for swinging the points of each battery of cutters forward and ba clc ward, i

12. In a. device of the class described, a supporting frame, a carriage capable of transverse movement on said supporting frame,- means for moving,- said carriage" in either direction, batteries of reciprocating cutters mounted on and adapted to cut for- "ward of said carriage, one" oii said batteries being adapted to cut materialwhen the cardirection, and the other adapted to operate when the carriage is moved in the reverse direction, and means for actuating said cutters;

13. In ,it device of the class described, av

supporting frame, a carriage capable of transverse movement on said supporting frame, means for movin said carriage 1n either direction, batteries of reciprocating ruttersmounted on, and adapted tocut forward of said carriage, one of said batteries beingadapted to cut material when the, car riageis moved in one direction, and the other adapted to operate when the carriage 1 either direction,

is moved in the reversedirection, pneumatic means for actuating said cutters, vand .inde-.

means for actuating said cutters, independ ent means for moving each: battery of cutv ters transversely relative to the movement of said carriage, and means for elevating and discharging the material removed by said cutters. I,

e 15. In a device of the class described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage 1n either direction, batteriesof reciprocating cutters mounted on and adapted to cut forward of said carriage, one of said batteries being adapted to cut material when the carriage is moved in one direction, and the an d the 7 other adapted to operate when the carriage is moved" in the reverse direction, pneumatic means for actuating said cutters, independent means for moving each battery of cutters transversely relative to the movement of said arriage, and independent means for moving the points of each battery of cutters forward and backward.

16. In a device of the clas described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, batteries of reciprocating cuttersmounted on, and adapted to cut forward ofsaid carriage, one of said batteries being} adapted to cut material when-the carriage is moved in one direction, and the other adapted to operate when the carriage is moved in the reverse direction, pneumatic means for actuating said cutters, independentmeans fon moving each battery of cutterst-ransversely relative to the movement of said vcarriage, independent means for movingthe points of each battery of cutters forward and backward, and means for elevat ing and discharging the material removed by said. cutters.

In a'device of the classdescribed, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, batteries of reciprocating cutters mounted on and adapted to cut forward, of said carriage, one: of said batteries being adapted to cut material when the carriage'is" moved in one direction, and the other adapted to operate when the carriage is moved in the reverse direction, pneumatic means for actuating said cutters, independent means for moving each battery of cutters transversely relative to the movement of said carriage, independent means for moving the points of each battery of cutters. forwardand backward, means for elevating and discharging the material removed by said cutters, comprising a transverse conveyor anda longitudinal elevator on said supporting frame, a longitndinal conveyor for each battery of cutters on said carriage,

designed to discharge material into said transverse conveyor, means fordriving each of said conveyors, and a scraper for each battery of cutters. 7

1 8. In a device of'the class described, a supporting frame, acarriage capable of a horizontal and a transverse movement on said supporting frame, means for moving said carriage in either direction, said carriage being designed tocarry vertical batteries of reciprocating cutters mounted thereon, and adapted to out forward of said carriage, one of said batteries being adapted to out material when the carriage is moved in one direction, and the other adapted to operate when mowed in the reverse direction,

means for actuating said cutters, and independent means for moving each battery of cutter vertically. r

19. In a device of the class described a supporting frame, a carriage capable or a horizontal and a transverse movement on said supporting frame, means for moving said carriage in either direction, said car- -triage being designed to carry vertical batteries of reciprocating cutters mounted thereon, and adapted to cut forward of said carriage, one of said batteries being adapted to cut material when the carriage is moved in one direction, and the other adapted to opcrate when moved in the reverse direction, means for actuating said cutters, independent means for moving each battery of cutters vertically, and independentmeans for moving the points of each battery of cutters forwardly and baclrwardly.

20. In a device of the class described, a supporting frame, a carriage capable of a horizontal and a transverse movement. on said supporting frame, means for moving said carriage in either direction, said carriage being designed to carry vertical batteries of reciprocating cutters mounted thereon, and adapted to cut forward of said carriage, one of said batteries being adapted to cut material when the carriage is moved in one direction, and the other adapted to operate when moved in the reverse direction, means for actuating said cutters, independent means for moving each battery of cutters vertically, independent means for moving the points of each battery of cutters forwardly and baclrwardly, and means for elerating and discharging the material removed by said cutters.

21. In a device of the class described, a, supporting frame, a carriage capable of a horizontal and a transverse movement on said supporting frame, means for moving said carriage in either direction, said carriage being designed to carry vertical batteries of reciprocating cutters mounted thereon, and adapted to cut forward of said carriage, one of said batteries being adapted to mt material when the carriage is moved in one direction, and the other adapted to opcrate when moved in the reverse direction, means for actuating said. cutters, independent means for moving each battery of cutters vertically, independent means for moving the points of each battery of cutters forwardly and backwardly, means for elevating and discharging the material removed by said cutters, comprising a transverse conveyor and a longitudinal elevator on said supporting frame, a longitudinal conveyor for each battery of cutters on said carriage designed to discharge material into said transverse conveyor, and means for driving each of said conveyors.

22. In a device of the class described, a

supporting v frame, a carriage capable of a horizontal and a transverse movement on said supporting frame, means for moving said carriage in either direction, said can riagc being designedto carry vertical batteries of reciprocating cutters mounted thereon, and adapted to out forward of said carriage, one of said batteries being adapted to cut material when the carriage is moved in one direction, and the other adapted to operate when moved in the reverse direction, means for actuating said cutters, independent means for moving each battery of cutters vertically, independent means for moving the points of each battery of cutters forwardly and 'baclrwardly, means for elevating and discharging the material removed by said cutters, comprising a transverse conveyor and a longitudinal elevator on said supporting frame, a longitudinal conveyor for each battery of cutters on said carriage designed to discharge material into said transverse conveyor, means for driving each of said conveyors and a scraper for each battery of cutters.

23. In a device of the class described, a supporting frame, a carriage capable of a horizontal and a transverse movement on said supporting frame, means for moving said carriage in either direction, saidcarriage being provided with vertical slide bars, a pivoted shaft mounted longitudinally on each of said slide bars, a'battery of reciprocating and laterally extending cutters on each of said shafts, the cutter ends of the cutters of each shaft being in a plane through the center of the shaft, and equidistant therefrom, the cutting edges of one battery being opposite to those of the other, means for reciprocating said cutters, means for moving said slide bars longitudinally, and transversely with said carriage, and means for rocking each of said shafts to move the cutting edges of said cutter forwardly and baclrwardly.

24; In a device of the class described, a cutter head for mining machines comprising a shaft, a series of spaced diverging cutters mounted thereon to reciprocate longitudinally in a common plane substantially through the center of said shaft, means for actuating said cutters, means for supporting said cutter head, means for moving said head vertically and means for moving, the points of the cutter of said head forwardly and backwardly.

25. In a device of the class described, a supporting frame, a carriage capable of transverse movement on said supporting frame, means for moving said carriage in either direction, two batteries ofcutters mounted on and adapted to cut forward of said carriage, each of said batteries comprising a vertical series of horizontal and reciprocating cutters, the cutters of one battery being designed to operate in the opposite direction from those of the other, one of said batteries being adapted to cut material When the carriage ismoved in one direction, and the other adapted to operate when the carriage is moved in the reverse direction, means for actuating said cutters, and means for shifting either of said batteries vertically relative to said carriage.

26. In a device of the class described, a support, a shaft having a series of diverging cutters mounted thereon to reciprocate longitudinally in a common plane substantially through'the center of said shaft, means for oscillating said shaft, and means for movin said shaft longitudinallyrelative to saic support.

27. In a device of the class described, a support, a shaft having a series of diverging cutters mounted thereon to reciprocate longitudinally in a common plane substantially through the center of said shaft, means for oscillating said shaft, means for moving said shaft longitudinally relative to said support, and means for reciprocating said cutters.

Des MCiiI16S, IOW3J, March 16, 1922.

HALVER R. STRAIGHT.

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