US1575531A - Coal-cutting machine - Google Patents

Description

I! Sheets-Sheet 1 INVENTOR 11034,, Braekeff HIS ATTORNHY.

J. C. BRACKETT COAL CUTTING MACHINE Filed May 16, 1924 .MWH R March 2 1926.

March 2 1926. 1,575,531

J. c. BRACKETT COAL CUTTING MACHINE 3 Sheets-Sheet 3 BY w H15 ATTOR EY March 2 1926. 1,575,531

J. C. BRACKETT COAL CUTTING MACHINE Fil y 16. 9 3 Sheets-Sheet :5

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"I HIM rsll Patented Mar. 2, 1926.

*umren sr r s PATENT ()FFICQ JOHN C. EBRACKETCE, OF PHILLIPSBURG,

new. JERSEY, AssIenon rro .INGERSOLL- RAND COMPANY, DIE-JERSEY CITY, NEW JERSEY,.A CORPORATION OF NEW JERSEY.

GOAL-CUTTING MACHINE.

Application filed May 16, 1924. Serial No. 713,700.

To all whom it may concern:

Be it known that I, JOHN C. Bnaorrnrr, a citizen of the United Stat-es, and a resident of Phillipsburg, county of \Varren, and l State of New Jersey, have invented a certain Coal-"Cutting Machine, of which the following is a specification, accompanied by drawings.

This invention relates to coal mining machinery, and more particularly to coal cutters of the turret type which operate against the coal by means of a cutter having an endless chain carrying teeth and adapted to cut a slot or channel in the face of the coal. 1 It is an object of this invention to enable the cutter bar to be swu-ngin any desired "direction or inclined or reversed'by a mechanism whichtis simple in construction and easily L operated and controlled. Another 2 object of the invention is to simplify "the construction of the operating mechanism for the cutter chain in order-to produce higher efficiency and "greater power.)

Other objects and advantages of theinvention will be in part obvious and in part pointed out hereinafter. In the drawings forming part of the specification and in which similar reference characters refer to similar parts,

Figure V cutting machine constructed in accordance with the practice ;of the inventio1r;-

. Figure 2 is a longitudinal vertical section of the machine shown in Figure showing the "internal construction and arrangement of'theiparts; and i r "Figure .3 is aplan view of the machine, partsheing broken "away to show the internal construction of "the driving gear.

The machineillustrated in the drawings comprises a-car A provided at its front end 'with .a column Bf or supporting the cutter "bar mounting O. A cutter bar D ismounted on the head '0 and supports an endless chain E having projecting teeth which are adapted to cut into-the coal to form a slot or channel in the usual in annerL f Preferably, the car A is propelled by an electric drive, as for instance, themotor G which is adaptedto rotate the wheels H through the medium of suitable gear transmission. For slower speeds there is provided a pinionJ on the motor shaft K en- .gagingflwith the gear L on a counter shaft 0 having a pair of Worms P at either end 1 is aside elevation of a turret coal meshing with the Worm wheelsQkeyedto the axles R upon which the Wheels Hare fixed. For propelling the car at higher speeds a higher gear ratio is prov-ided by the gear 8 on the motor shaft Kavhic'h is adapted to drive asmaller pinion T on the counter shaft 6). Selection of the desired gear is-accomplished by meansof a lever U'which is connected by means of a yoke V with a sliding jaw clutch W cooperating with the pinion J and gear S to connect one or the other as desired with the motor shaft K. "Usually the higher gear is employed for propelling the machine about the mine from one room to another. The smaller gear, however, is used for propelling the machine forward. when greater power is necessary, such as in sumping wherein the cutter bar D is forced forward into the face of the "coal seam. The speed of the vehicle-may also be controlled by a suitable afheost'at controller box X situated at the back platform Y providedfo-r the operator.

The column B which supports the cutter har mounting C is, in this instance, a plunger which cooperates with a movable cylinder Z attached to the mounting C and is a means for raising and lowering the mountingC locating the cutter bar 1) at any desired height within "the limits of tbemovement of the cylinder Z on the column B. The gear pump 6 may be operated continuously; its discharge of oil or other suitable fluid being conducted by a supply pipeg-c to a three-way valve d which in its normal position bypasses the oil back to the oil reservoir 0 through a by-pass pipe f. In the alternate position of the valve (Z the supply of oil is conducted from the supply pipe 0 to the pipe at and thence into the interior of the cylinder Z. lVhen' the valve is turned to a third position, the oil withinthe cylinder Z is returned due to the pressure caused by the weight of the cutter bar mounting 0 through the pipe at back through the valve d and the by-pass f'to the reservoir permit ting the cutter bar mounting-to lower by gravity. In order to preventthe cylinder 9 attached to the column B which fitinto grooves it on the inner surface of the cylinder. The packing j betweenthe column B and the cylinder Z is preferably heldin place on the cylinder Z by means ofa ring 7c secured in any sigitable manner .on the bottom flange 0 of the cylinder.

The cutter bar mounting G is supported on a" boss 22 preferably cylindrical and held thereon by means of a plate bolted or otherwise securedto the boss. The portion '1 of-the mountingC which fits onto the boss 19 is provided with a cylindrical aperture fitting the boss so that the mounting C may rotate in a-vertical plane. Such rotation is controlled by means of a worm Wheels formed integrally with the portions r and cooperating with a worm" t mounted on the cylinder Z. The'hand wheel a which,

if desired, may be provided with suitable reduction gearing 20, provides means for rotating the worm 25 whereby the mounting C is turned to the desired angle and proper inclination.

, The cutter bar D is offset from the boss p so that when it is desired to channel close to the floor, the mounting C is reversed by rotation about the-boss 79 and in such position the cutter bar D may operatevery close to the floor without obstructionon the part of any of the parts of the machine. Also, when it is desired to cut close to the roof, the mounting C may be turned so that the cutter bar D lies horizontally above the column B and projects forwardly, no obstruction being provided by any other part of the machine to the cutting directly on a level with the roof. With the aid of the worm t and the worm wheel 8 the cutter bar D may also shear through the coal whether vertical or inclined in other directions.

The cutter bar mounting C includes a casing 1) which houses a driving motor '10 and suitable reduction gearing including the pinion .00 and the, gear y for driving the chain sprocket a by'whi'ch the motion of the cutting chain E is caused. The motor to i may. be controlled in any suitable manner,

as for instance, by means of the controller rheostat 2 mounted on the car A.

In operating the machine for cutting-coal,

it is commonly the practice to swing the cutter bar D through an arc in this manner forcing the cutter bar sidewise into the coal. For this purpose the motor w is rotatable within the mounting G. The lower portion 0 Q of the motor casing supports a pinion 4 which is supported at its upper bearing by a. gear case 5 pivotally attached to the easing of the motor w. The pinion 4 meshes with. teeth6 cut in the periphery of the mounting C and is driven by a worm wheel 7 meshing with the worm 7 which by means of a jaw clutch 8 is in turn driven by a worm wheel 9 meshing with a worm 10 on the shaft 11 of the motor w. The clutch 8 is adapted to be controlled bymeans of a yoke 12 attached toa pivoted lever13.

Thus, when it is desired to swing the cut- In order that the cutter baroD may be swung by hand in either direction, means are provided to disconnect the worm wheel 7 from the pinion 4 and to this end a jaw clutch 14 is provided to engage and disengage the worm wheel 7 from the shaft of the pinion 4. A lever 15 is adapted to operate the clutch 14.

I claim:

1. A coal cutter comprising the combination of a cutter bar, a cutter bar mounting, r.

a column, fluid pressure operated means to support said cutterbar mounting adapted to be raised on said column, a motor for operating said cutter bar rotatably dlsposed ,on

said mounting and supporting said cutter.

bar, and means adapted to rotate said motor for swinging said cutter bar.

2. A coal cutter comprlsing the combination of a cutter bar, a cutter bar mounting,

a column,,fiuid pressure operated means to support said cutter bar mounting adapted to be raised on said column, amotor for operatingsaid cutter bar rotatably' disposed on "said mounting and supporting said'cutter bar, means adapted to rotate said motorfor swinging said cutter bar, said means comprising gear teeth on said mounting and gearing associated with said motor to be driven thereby.

8. A coal cutter comprising the combination of a-cutter bar, a cutter bar mounting,-

an electric motor for operating said cutter bar rotatably supported in said mounting and adapted to rotate said cutter bar and means to rotate said [motor in said mounting including gear teeth on said mounting,

a gear supportedby said motor casing and driving connections associated with the shaft of said motor and said gear.

4. A coal cutter comprising the combina tion of a carriage, a column 'on said carriage, a cutter bar mounting adapted to'be raised and lowered onsaid column, means for rotating said mounting about a horizontal axis with respect to said column, an:

electric motor for operating said cutter bar in said mounting and rotatable therein, a cutter bar relatively fixed with respect to said motor and rotatable therewith and means for swinging said motor and cutterbar with respect to said mounting.

5. A coal cutter comprising the combinato said. motor and rotatable therewith, and tion of a carriage a column on said carriage, means for swinging said motor and cutter 10 a cutter bar mounting adapted to be raised bar With respect to said mounting including and lowered on said column, means for rogear connections With said motor and opert-ating said mounting about a horizontal axis able against said mounting. I with respect to said column, an electric In testimony whereof I have signed this motor in said mounting and rotatable therespecification.

in, a cutter bar relatively fixed With respect JOHN C. BRACKETT.

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