US557144A - Mining-machine - Google Patents

Description

(No Model.) i l y '/sheets-sheen 1'.

E, S. MGKINLAY'.

MINING MACHINE.

vPawntealvmr.31,1896.

Tsheets-sneet 2. E. S. MOKINL'Y.

MIN-ING MACHINE. X

Patented Mar. 3l

i @uw .w QM KNITW Y (No Model.)

AN DREW EJSRANAM. FHUTOUTHQWASHINGTONL.

7 Sheets-Sheet 3.

E. QS; MGKINLA'Y, MINING-MACHINE.. I

n 935 es 3 @LWL @any B. s. MOKINLAY. MINING MACHINE. v

Patented Marv. 31, 1896.

7 Sheets-Sheet 5. l

(No Model.) 7- Sheets-Sheet 6.

E. s. MGKINLAY. MINING MACHINE. No. 557,144. Patnted Ma,1.3l,1896.

m UU GRAHAM4 PMUTO-LITIIQWASHINGDN. D Cv (No Model.)

. 7 Sheets-Sheet 7. E. S. D/ICKIDUJY.l

MININGMAGHINE.

. Patented Mar. 31., 1896.

` Inventar' NCM,

Witnesses @wwwa/6h07,

AN DREW BGRANAM. PMUTC-LITHG-WASNI NGTON, D C.

NiTnD STATESV VPiYrENT OFFICE.

EDVARD S. lWICKINLAY, OF DENVER, COLORADO.

MINING-MACHINE.

VSl?ECIFICATION forming part of Letters Patent No. 557,144, dated March 3l, 1896.

Application filed .Tune 15, 1889. Renewed August 30, 1895. Serial No. 561,040. (No model.)

To all whom! it may concern:

13e it known that I, EDWARD S. MCKINLAY, a citizen of the United States, residing at Denver, in the county of Arapahoe and State of Colorado, have invented certain new and useful Improvements in Mining-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

Figure 1 is a view, mainly in plan, parts being broken away, of a mining-machine embodying my improvements. Fig. 2 is a longitudinal section of the same. Fig. 3 is a rear end elevation. Fig. 4 is a plan view of the main frame and the carriage. Fig. 4 is a section of that in Fig. 4. Fig. 4b is a part of Fig. 4 on larger scale. Fig. 5 is an elevation of one of the side tubes, looking from the inner side. Fig. Gis an end elevation from the rear. Fig. 7 is an end elevation from the front. Fig.v 8 is an edge of the cap which closes the rear end of the side tube. Fig. 9 is a longitudinal section of one of the side tubes, part thereof being broken away. Fig. 10 is a cross-section on the line x, Fig. 1. Fig. 11 is a rear end view of the piston and the parts attached thereto in Fig. 9. Fig. 12 shows in side view and in cross-section one of the cross connecting-pieces which unite the side tubes. Fig. 13 is a top plan view of one of the side bars of the carriage. Figs. 14 and 14 show the same in side view and in section. Fig. 15 is a top view of one of the cutterbar shoes detached. Fig. 16 shows one of the plates which connect the said shoe to the carriage. Figs. 17 and 18 show, detached,the bearing for the slack-removing shaft, one being a side view and Vthe other a top View. Fig. 19 is a longitudinal section of the engineplate. Fig. 2O is a longitudinal section of one of the steam-cylinders. Fig. 21 is a transverse section. Fig. 22 is a top plan view of the engine-plate. Fig. 23 is a rear view of part of the rear bar which supports the engine-plate. Fig. 24 is a vertical section of that in Fig. 23. Fig. 25 is a top view, and Fig. 2G a face view, of the carriage-bar which supports the front end of the cylinder-plate. Fig. 27 is a top view, and Fig. 28 a face View, of the bar which supports the adjusting devices. Fig. 29 shows in plan view a form of air-feeding devices. Fig. 29"L is an end view of the same. Fig. 29" is a partial side view. Fig. 29shows in section a check-valve. Fig. 30 is a vertical section of the four-way cock in Fig. 29. Fig. 31 is a horizontal section of the same.

The machine shown comprises two main parts-namely, the stationary bed and a carriage iitted thereto and moving thereon and carrying the cutting apparatus, the engines, and the power-transmitting devices.

The bed is composed of the side parts A A, bottom cross-girts B B, top cross-girts B B', and longitudinal sills B2 B2. The side pieces A A in the construction shown are tubular, in order that they may, in addition to being the longitudinal parts of the bed, be utilized for other purposes to be hereinafter set forth. Each is formed with an interior cylindrical chamber and is preferably cast with projections for uniting the connecting-girts, said projections, as shown, consisting of transversely-extended webs a, longitudinal webs a', and perforated bottom parts a2 belowthe parts A, and the transverse webs b, longitudinal webs b', and top parts b2, perforated at b3. There are several of these downward-extending projections a a d2 on the under side of each part A at intervals along the same, as it is desirable to employ several of the cross-girts B; but there need not be as many projections upward, one girt B' at each end of the frame being sufficient. Reference being made to Figs. 5, 6, 7, 12, 1, 21, and 3, the construction and arrangement of the features last described will be readily understood.

At the points where the parts A are provided with the projections just referred to I prefer to thicken them, as shown at a4, Figs. l and 5. The cross-girts B B may be duplicates of each other, and each is preferably formed with the vertical flanges b4 and base part b5. The flanges fit against and are bolted to the parts a2 and b2, above described, and, moreover, they serve to greatly increase the strength of the connecting parts without any material increase in the amount of metal. Each of the parts Ais also formed or provided with a carriage-guide upon its inner surface. As shown, each is cast with inwardly-extending ribs or flanges c, furnishing a way O between them. 'lhese ribs or iianges c not only furnish guides, but being more or less con- IOO tinuous longitudinally along the tubes, and preferably cast integral therewith, serve to strengthen them and prevent them from twisting or bending. The metal of the tubes being necessarily thin to make the machine as a whole comparatively light, the tubes are otherwise liable to be bent when the machine is being transported.

The carriage is constructed and fitted to the aforesaid parts as follows: It has side guides and support-bars D, which, as shown, are angular in section, (see Fig. 14,) there being top and bottom flanges d, with an intervening recess d'. These bars iit into the ways at C. D' is a cross-bar joining their rear ends. At (Z3 the front end of each is provided with teeth or ribs for holding the slack-removing shaft after adjustment, as will be described. The front portions of bars D are joined by braces D2 D2. (See Fig. et.)

The parts which have been described constitute the bed and the carriage, respectively, considered independently of the other parts.

In the present case `the carriage is advanced by means of air, water, steam, or other similar agent, the side pieces A of the bed being used as cylinders for receiving said agent and applying its power; but I wish it to be understood that I do not limit all the features of the present invention to such a feed. For this purpose pistons E are placed in the cylinders at A, which pistons and the other parts incident thereto will be more fully described below. At their front ends they are connected` with the carriage, preferably by means of the devices shown particularly in Figs. 9, l5, IG, l, and 2.

F represents generally a shoe projecting from the piston E, to which it is united by the part f, it being formed also with the bearing part f, the socket-piece f2, the web f3, web f4, and the socket f5, there being an aperture f for the cutter-bar and another at f3 for the slack-removing bar. Rivets or bolts at f7 fasten the piston to the parts f.

G G, Figs. 16 and 9, are plates fastened to the top and the bottom of the shoe F, each having an arm f, crossing the front end of a carriage-bar D, to which they are bolted. (See Figs. l and 4.) Then the piston-rod E moves, it carries with it the bars D and` the carriage.

As said, the slack-removing shaft I passes through the apertures at f8 in the shoes. It is held inbearing-bars I', each having a bearing i', a clamp-arm i", and an inclined arm i2, the inclined arm 2 having teeth or ribs t3 to engage with these bars D. i4 is a slot in arm t", through which the clamping-bolt 5 passes. By those devices the bar I, which supports the slack-removing chains, can be adjusted in the aperture f3.

l prefer to employ compressed air as the motive agent in the cylinders at A for moving the carriage and for obvious reasons. Each cylinder A is closed at the rear end by a cap A5, and at the front end there is a gland or stuffing-box at E2.

At the rear end the piston-rod E carries a piston-head at E', provided with paekings of any ordinary or any preferred style. The piston shown is hollow, which, though preferable, is not essential. By having it hollow I am enabled to overcome difficulties which are experienced in using feeding devices of this character. The air or other elastic agent not only presses against the piston at E, but as it has access to the interior of the pistonrod E it also exerts pressure through the whole length of the piston and against the front interior surface thereof. As a result, the force is applied near to the points of resistance and the tendency is to pull the piston-rod through the tube rather thaupush it. I overcome the tendency to strain, bend, or bind the piston-rod.

The air is admitted at the rear end of the tube through aperture j or apertures j and at the other end through apertures jg. J i is a pipe through which the air enters at j. It is united to the four-way cock at J which is also connected with the pipe J L J leading to the apertures j?. The main inlet-pi pe is shown atj4 andthe exhaust at NVhen the valve is inone position, air is let into the rear ends of both cylinders J at once and exhausted from the front ends. Uien it is in the opposite position, the air is exhausted from them and simultaneously supplied to the front ends.

I provide a cushion for the piston-head on its return stroke in the following manner: By examining Figs. I, 2, 9, 29, and 29" it will be seen that the aperture j is at such distance from the rear end of tube A that the pistonhead can pass it. I prevent the air which lies between the orifieej and the cap A5 from escaping,which air serves as the cushion. This is accomplished by check-valves at JG in a branch pipe J 7 communicating with the orifcej. As the piston moves back and after it passes the oriiice j it drives the valve Js against its seat and the cushioning air is retained. When the air is again let on for another throw, it opens the valve J b', enters the cylinder and drives the piston forward until the latter passes the orifice j, after which the air enters through its normal duet.

In order to save the comparatively large volume of air contained within the pistons E, I combine with them check-valves, as shown at e, Figs. l and 9, each being so arranged that when the air is let into the cylinder it can, if of sufficient pressure, open the valve e and prevent the escape of air therefrom. Thus the piston, though hollow, is no more expensive to operate than one of the ordinary kind with solid parts.

Iwill now describe the parts secured to the carriage to actuate the cutters and the other operative parts of the machine.

The engines are mounted on a supplemental frame secured to the side bars of the carriage.

IIO

L L represent two engine-cylinders, preferably arranged, substantially as shown, in respect to the longitudinal lines of the machine,

- one being upon one side of the center line and the other upon the other side.

l-Ieretofore in machines at all resembling mine the engines have been elevated and mounted at points above the plane of the cutter-bar, and the power has been taken therefrom through a train of shafting and gearing extending down to the said plane.

One of the important objects of the present invention is to bring all of the parts of the machine into as small a compass (vertically) as possible. I mount the crank-shaft in the horizontal plane of the cutter-bar, or substantially therein, and I can thereby applypower much more directly and effectively than in machines as heretofore constructed.

I provide what I herein term an engineplate, consisting mainly of the rearward-extending parts L L', the rear cross part L2, the forward-extending parts L3 L3, and the front cross part L4. Preferably these are all cast integral, and with them are also cast the cylinders L L and the bearings for the shafting. The crank-shaft T is mounted in bearings at Zland the chain-shaftVin bearings at FZ?, and in the construction shown in Figs. l to 3l an intermediate shaft U is used,which is mounted in bearings LL. The steam-chests M M are also cast with the cylinders L L, and after being bored and faced they are provided with heads, rocking valves, and the other parts necessary, which, however, need not here be described in detail. The valves are operated by eccentrics (shown in Fig. d3) on the crankshaft in any preferred way.

The engine-plate L L2 L3 L4 is supported on the carriage by means of a rear bar, generally indicated by N, and a front bar, similarly indicated by O. The bar N is shown detached in Figs. 23 and 24- and shown in place in Figs. l, 2, and 3, it being formed with a main back bar n, end plates n with recesses a2, wherein the side bars D iit, and with a horizontal supporting-flange n3. Upon this latter the engine-plate is bolted. (See Fig. 2.) At the front end the part L4 of the engine-plate is bolted to the bar O, (shown detached in Figs. 25 and 26,) it having the main cross part o, end plates o with recesses 04, wherein are fitted the bars D, piston-rod apertures o2, guide-rod apertures o3, and set-screw apertures o5. Set-screws o6 pass through the latter and clamp the part O to the side bars D after adjustment. The bar O has a flange O to support the engine-plate. (See Figs. l and 2.)

R represents the piston rods passing through apertures o2 02, and to them are clamped the guide-boxes r r, traveling on the guides RQ which latter are bolted, respectively, at their rear ends to ears ZG on the cylinders and have their front ends supported in the apertures o3 in bar O. The wrist-pins of the guide-boxes are connected with the wrist-pins of the crank-shaft T by means of the connecting-rods S. It will be seen that by this arrangement of the parts I can obtain as long a stroke of the pistons as is necessary and yet reduce the distance between the crankshaft and the cylinders, said shaft lying on that side of the cylinders opposite to the pistons. The power is taken from crank-shaft T by spur-wheel t to wheelu on intermediate shaft U, from whence in turn it is taken by pinion u to the gear o on the chain-shaft V. The latter is connected by one or more driving-chains W with the cutter-bar, and one or more slack-removing chains X with the bar I.

The cross-shafting and all its parts lie in substantially the same plane, each of the shafts being brought down and secured directly to the carriage. Of course there can be some variation as to the positions of these shafts and yet attain more or less of the advantages which I accomplish. They could be mounted upon the top of the sliding guidebars D; but it is desirable to have them low enough to permit 'the chains W and X to readily pass into and out of the kerf formed under the coal by the cutter-bar.

Although I have shown an intermediate shaft U, this can be dispensed with, and the chain-shaft can be geared directly to the crank-shaft.

In order to provide for a longitudinal adjustment of the parts last above described, including the shafting and the engines, I employ a cross-bar I), (shown detached in Figs. 27 and 28,) which is bolted to the carriage-bars D. It has a main part p, with end plates p to receive the bolts, having also apertures at p2 for the screws Q and apertures at p3 to receive the ends of the pistons. The screws Q bear against the aforesaid bar O, and they are provided with wrench-heads q and locknuts q. By means of these (after the setscrews at o6 have been loosened) the motor parts of the machine can be adjusted forward or back on the carriage, and after adjustment 'they can be locked in position by the setscrew o6 and the lock-nuts q.

In order to give a strong bearing for the shafts U and V, I cast the engine-frame with enlargements of metal at L5, (see Figs. 19 and 21,) wherein the boxes are seated. I

Vhen the parts which have now been referred to are properly constructed and arranged, they can be so related to each other that there shall be but little friction between the carriage and the bed; but in order to still further reduce the friction use may be made of antifriction-rollers. I have shown such rollers arranged to support the carriage, they being indicated at bs and resting upon a track at B5, supported upon the cross-girts B. The track is V-shaped (convex) in section, and the rollers are also V-shaped, (concave.) )Vith these I combine also vertically-arranged rollers b9, they being interposed between the side parts A of the bed and the carriage-bars D, being seated in the grooves in the latter.

IOO

IIO

When the side parts of the bed are cylindrical, I prefer to have these rollers b9 formed with concave peripheries (see Fig. 4") to conform to more or less of the said cylindrical surface. Thus not only is the carriage provided with an antifriction-support and an antifriction lateral fitting to the bed, but also, if it should tend to` be lifted at any point, it is resisted by the antifriction-rollers b9, the lower parts thereof bearing upward more or less against the bed.

I do not wish this part of the construction to be limited to tubular or cylindrical side pieces on the bed, as the same ends can be attained if an ordinary sidefranie or bed be employed.

In other respects themachine can bemore or less modifiedl without departing from the spirit of the invention. I do not limit myself to the use of antifriction-rollers, and in some instances have preferred to construct the frames shown in Figs. l to Siwithout them, the side bars of the carriage being fitted directly to guides on the side bars of the main frame.

I have shown but one drivin g-chan for the cutter-bar; but many of the parts of the machine I have shown can be usedwhenaseries of chains are used to drivethe cutter-bar. Nor do I wish to be limited to the use of a chain engaging directly with the cutterebar,

as i it is now well knownthat these cutter-bars guide, engines, engine-supports, power-shafting, and power-transmitting devices between the engines and the cutting apparatus, each or all. So, too, the meansfor letting on and exhausting the air or driving agent can be modified without departing from the remainder of the invention.

I amwvell aware of the fact that heretofore machines have been constructed wherein air was used for moving one part or another, and of course I do not broadly claim such matter as my invention; but I believe myself to be the first to have so constructed, arranged, and combined the various parts of the frames of a mining-machine and to have so mounted the continuallyadvancing cutting apparatus thereon that the latter can be fed to its work and held there by the yielding pressure of the air. The circumstances of such work are radically different from those where the material to be operated upon is moved, or where a chisel cutting implement is reciprocated, as is the case where drill or cutting implements have been actuated by anything at all akin to the devices which I have shown.

will be seen that (considering the whole of a cut as one operation) the air devices in my case do not operate for effecting reciprocation, but for the purpose of holding the cutting apparatus firmly, though yieldingly, against the coal.

I-Ieretofore in mining-machines at all resembling mine use has been made of positively-actin g devices for eifectin g the advancing of the cutting apparatusthat is to say, devices such as racks and pinions or screwshafts and nuts or worms; VVith such feeds there can be no yielding of the cutting apparatus should it strike against exceedingly hard materials, (such as sulfur balls orv niggerheads,)'which are constantly met with in coal-mining, and as a consequence breakages of the cutting apparatus or of the machine are constantly occurring. This is obviated with a construction ofA the character which I have shown.

I am alsowelll aware of the fact that drilling-machines have been constructed or proposed with parallel drill-rods and cylinders, the piston-rods being connected to form an abutment anda bearing for a drill-shaft,which is fed longitudinally by hydraulic pressure to itswork. Sueha construction is shown in the patent to Allison, No.` 145,77 5, dated December 23, 1873, and Il do not claim it as of my invention; but my machine differs very materially from that of Allison. In mechanisms such as his a vertically-arranged frame is utilized to support the cylindersand the motor, the cutters being supported entirely independently of the cylinders and rotating in planes transverse to the axis of the feed-tubes. The motor is mounted on the stationary frame, there being no carriage, save the connecting-braces for the pistons. There is, therefore, no necessity for strong braces connecting the ends of the cylinders. In my construction, however, the tubes or cylinders are utilized to form the side parts of the bed, there being braces connecting them, which must'be firmly secured to them in order to stand the strong reactionary thrust of the cutters, as well as the heavy strains, blows, and jars,which are experienced in moving the machine from place to place and jacking it in an operative position. Then, too, a-sliding carriage is employed, it reciprocating in guides secured to the tubes and'carrying the engines or motors with it as it feeds forward or recedes. The tubes withstand the downward and lateral thrust of the carriage as it reciprocates without danger of cramping at any point, they furnishing long guides for the carriage -bars, which support the cutting apparatus, the said guides or ribs materially strengthening the tubes from bending or warping.

In such earlier construction as that of Allison the tubes were not only not parts of the bed or frame, properly considered, but they were clamped to the frame in a way radically different from that which I follow, as clamping or connecting bars were formed in half parts, one half lying below and the other half IOC IIO

lying above the plane of the axes of the cylinder and bolted together at that plane. I, on the contrary, avoid entirely the presence of stationary parts in the path of the carriage not only from the plane of these axes above, but, on the other hand, in a plane considerably below it. As a result I am able not only to have the lines of feed-pressure in the plane of cut, and also support the carriage and its attached parts properly in relation to that plane, but also have an unobstructed space for the free movement of the cutting apparatus and the power parts on the carriage.

IVha-t I claim isl. In a mining-machine, the combination with the sliding carriage having the two side bars and cross-bars joined to form a quadrangular frame, the transverse cutting apparatus, and connecting devices for uniting the cutting apparatus to the carriage, of the feed-cylinders, and the pistons therein supplemental to the carriage-bars, said pistons being united with the aforesaid connecting devices substantially as set forth, whereby the cutting apparatus is connected to the side bars and to the pistons, as described.

2. In a mining-machine, the combination with the carriage having the side supportingbars and cross-bars connected to form a quadrangular frame, the transverse cutting apparatus at the front end of the frame, the transverse power-shaft nearer the other end of the'carriage-frame, the devices supported on the carriage for removing the slack, the feed-cylinders, and the pistons therein supplemental to said carriage side bars and connected with the carriage, substantially as set forth.

In a mining-machine, the combination of the cylinders, the cross-bars joining the cylinders, substantially as set forth, whereby they form the longitudinal parts of the bedframe, the ways formed upon or secured rigidly to the cylinders, the carriage iitted to the said ways, the cutting apparatus mounted across the front end of the carriage and having its bearings at or near the longitudinal lines of the sides of the carriage, and the pistons united to the carriage at points adjacent to the longitudinal lines of said bearings, substantially as set forth.

4. In a mining-machine, the combination with the carriage, the cutting apparatus thereon, the power devices on and traveling with the carriage, the stationary feed-cylinder, the piston therein connected rigidly to the carriage and always preserving the same relation thereto and projecting through the cylinder toward the cutters and directly connected to their support,the cross-girts secured to the cylinder below the top lines thereof, and the longitudinal sills B2 which connect said cross girts, arranged substantially as set forth.

5. In a mining-machine, the combination of the rectangular non-rotary sliding frame which moves horizontally and carries the cutting apparatus, a stationary frame having longitudinal cylinders arranged horizontally upon the sides of the sliding frame to receive the downward and lateral thrust of said frame and pistons within said cylinders connected directly with the sliding frame and moving through the front ends of the cylinders directly toward the material to be cut, substantially as set forth.

G. In a mining-machine, the combination of the rectangular horizontally-sliding nonrotary frame carrying the cutting apparatus, a stationary frame having horizontal cylinders as supporting and connecting means at the sides, said cylinders having longitudinal ways or guides secured thereto in which the said rectangular frame slides, pistons reciprocating through the forward ends of the cylinders, and connected directly with the aforesaid frame, a cross-piece which rigidly connects the rear ends of the tubular connecting-pieces, and a cross-piece which rigidly connects the front ends thereof, whereby said tubular connecting-pieces are joined from end to end to resist the thrust and pressure of the sliding frame, substantially as set forth.

7. In a mining-machine, the combination of the horizontal side cylinders, the crosspieces which join together said cylinders to form a stationary frame, a sliding rectangular non-rotary frame arranged in the horizontal planes of the cylinders and having side bars respectively supported on said cylinders, a rotary cutter-shaft arranged transversely to the cylinders, the chain-shaft on the sliding frame parallel to the cutter-shaft, the powershaft on the sliding frame transverse to the cylinders, and the pistons within the said cylinders and connected to the sliding frame at points adjacent to the longitudinal lines of the cutter-shaft bearings, substantially as set forth.

8. In a mining-machine, the combination of the sliding frame, the stationary frame, a cylinder connected with the stationary frame, a piston within the cylinder provided with an aperture adapted to be opened to permit the passage of air through the pist-on, and a hollow rod secured to the piston and having its interior chamber arranged to communicate with the aperture through the piston, and having its front end closed, substantially as set forth.

9. In a mining-machine, the combination of the sliding frame, the stationary frame, a tube, secured to the stationary frame, a piston therein having an aperture adapted to be opened to permit the passage of air, a pistonrod within the tube connected with the sliding frame and constructed substantially as set forth with an interior air-chamber extending through the front end of the tube, the front end of said chamber being closed, substantially as set forth.

lO. In a mining-machine, the combination of a stationary bed, the carriage sliding thereon, the horizontally-mounted rotating cutter- IOO IIO

bar, the horizontally-arranged chain for driving said cutter-bar, the engines on the carriage, and the crank-shaft mounted upon the carriage substantially in the horizontal plane of the cutter, whereby the power can be imparted from the engines on substantially direct lines to said bar, and the chain can throughout its length lie in substantially the horizontal planes of the kerf, as set forth.

11. In a mining-machine, the combination of the stationary bed-framey having longitudinal guides, the carriage havin g side bars sliding therein, the transverse cutter-bar mounted in the ends of the said side bars, the engine on the carriage, the rearward-extending chain, the chain-driving shaft and the crankshaft geared together and both situated in the horizontal planes of the cutter-bar, substantially as set forth.

12. In a mining-machine, the combination of the carriage, the bed-frame having a guideway to hold the carriage from vertical displacement, the cutter-bar mounted in the horizontal planes of the path of the carriage, the cutter-bar-driving chain, the chain-driving shaft mounted substantially in the planes of the kerf or cut, a second shaft mounted substantially in the horizontal plane of the chain-driving shaft, and the prime powershaft geared to the said second shaft, substantially as set forth.

13. In a mining-machine, the combination of the carriage the bed having longitudinal guides to prevent displacement of the carriage, the plate or bearing support on the carriage between and below the upper lines of the side parts of the bed, the chain-driving shaft mounted on said plate, the cutter-bar mounted on the carriage in the horizontal planes of the said chain-driving shaft, the chain extending from the cutter-bar to its driving-shaft and lying in the planes of the kerf or cut, the second driving-shaft mounted on the said carriage-plate below the top line of the bed and geared to the chain-driving shaft, and the prime power shaft having speed-reducing gearing connecting it to the said second shaft, substantially as set forth.

1-1. In a mining-machine the combination with the sliding carriage having two main side bars, the stationary bed for said carriage having side parts which extend above and below the carriage, and the cutting apparatus on the carriage, of cross-girts connecting the rear parts of said carriage-bars, the engineplate resting upon and bolted to the said crossgirts and having depressions or apertures adjacent to the side bars, the engine on the carriage, the crank-shaft mounted in or near the central horizontal plane of the machine and arranged to have its cranks revolve in the said depressions or apertures, substantially as set forth.

15. In a mining-machine having a stationary bed, a carriage held by said bed against vertical displacement, and a cutting apparatus on the carriage, the herein-described com bined engine-cylinder and shafting-support consisting of the plate having the horizontal supporting parts L2, L4, and the cylinders L cast integrallytogether, said plate portion being adapted to have the shafts mounted directly thereon, one or more in line with the cylinder axes, substantially as set forth.

1G. The combination with the carriage and the cutting apparatus thereon, of the feedtube, the piston therein, the hollow piston-rod connected to the carriage, having an aperture communicating with the air-supply and an automatic valve therein whereby a constant pressure can be maintained in said rod, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

EDXVARD S. lilcKINLAY.

Titnesscsz PERCY AUSTIN, JAMES R. Ivns.

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