US289742A - Mining-machine - Google Patents

Description

' (No Modei.)

.. WI-LVERTH.

' MINING MACHINE; V

No. 289,742. Patented Dec. 4, 1883.

UNITED STATES PATENT OFFICE.

HENRY VILVERTTT, OF ST. CHARLES, KENTUCKY.

MINING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 289,742, dated December 4, 1883.

Application filed October 16, 1882. (No model.)

nal section of the joint or pivot for the swinging beam.

The object of my invention is to provide a new and improved coal-excavator; and it consists of a tubular standard on a suitable base, having at its upper end a head screw-threaded within to receive a screw-threaded rod, so that when the standard is placed in the channel of a mine the screw-rod performs the office of a jack and holds the standard firmly between the floor and roof of the channel. The standard is further provided with a crane,which is capable of swinging around from side to side. A balanced lever having at one end a handle and at the opposite end the excavating-bit is attached to the end of the crane by a chain and balanced, all of which will now be described in detail.

In the accompanying drawings, A represents a suitable base composed of a crosspiece of any convenient size or shape.

B is a tubular standard, preferably made of gas-pipe, secured permanently to the basepiece A. The upper end of the standard has ahead, 0, screwed thereon. The head has a screw-threaded aperture to receive a screwthreaded shaft or rod, D, provided with a swivel-head, E. The rod D has also holes F at the upper end, to enable a small hand lever or rod to be placed therein for the purpose of manipulating the screw. The body of the tubular standard B has a series of holes, G, in one side, as shown. The standard carries an arm or crane, H, which arm is pivoted on the standard by suitable bearings, I. One of these bearings is' provided with a thumb-nut,- J, so that when the crane has been rotated to any point the thumb-nut will hold it in position. Pins placed in theholes G serve to hold the crane after being vertically adjusted. The

outer end of the crane is provided with an eye,

K, to which is attached the pendent chain L.

The beam M, which carries the excavatingbit, is made of any suitable size and length, and is provided at the forward end with a socket or eye, to which the bit N may be attached. At a point near the center isa rib or shoulder, O, and a thimble or globular coupler, P, is placed on this beam loosely, so that one side rests against the shoulder O. A pin, Q, through the beam serves to hold the coupler in position. The coupler is provided with two lugs'or studs, R, which project out on opposite sides at right angles to the line of the beam. A loop, S, having a hook, is secured to these projecting lugs R, and the hook T is attached to the pendent chain, so that the beam is carried thereby. A weight, U, is placed on the rear endof the beam, to counterbalance the forward end of the beam. At the extreme rear end of the beam is an arm, V, projecting upward at right angles from the beam M. This arm is adjustable by means of the bolt V, as shown.

W represents a bar having its forward end forked and-attached to the lugs or studs R, projecting from the coupler 1?. Its rear end is attached to the arm V, and carries also a cross-handle, X, by meansof which the operator manipulates the beam. A handle, Y, is also placed on the bar \V at a suitable point between the arm V and the coupler I.

It will be observed that in operation the beam is counterbalanced by the weight U, and is capable of being turned or revolved in the coupler P,wh en the set-screw or bolt V is released, thus enabling the operator to incline the prongs of the forked bit N in any direction. It is also obvious that when the beam is thus suspended on the crane H the bit may be directed to any point by means of thehandles X Y, and propelled forward with great force against the mass of coal.

The operation is as follows: The base and standard are placed in the channel at a suitable point, and the j ack-screw at the upper end employed to hold the same gfirmly'betweea the floor and wall. The crane His then turned to the proper position to permit the swingingbeam to work freely and not obstructively.

The operator then grasps the handles KY, and, drawing back the same, propels the beam forward in the direction required. The weight of the beam, the counter-balance U, and the globe-coupling 1? all serve to furnish momentum in the operation.

WVhat I claim is I 1. In coal-excavators, the rotatable beam M, having centrally the globe-connection I and at the rear end the adjustable arm, in eombination with the bar WV, hinged at its forward end to the globe-coupling, and attached at its rear end to the arm V, and with the crane H, to which it is suspended by the chainL, substantially as and for the purpose set forth.

2. The base A and tubular standard B, having at its upper end the jack-screw and the rotating crane H, as shown, in combination with the rotatable beam M, having the globular coupling 1?, counter-weight U, and adjustable 2o arm V, and with the forked bar W, handles X Y, and loop S, hook T, and supporting-chain L, substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand, this 2d day of 25

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