US1008818A - Mining-tool. - Google Patents

Description

A. W. HARRIS. MINING TOOL.

APPLICATION FILED MAY 26, 1911.

1,008,818, 7 Patented Nov. 14, 1911.

UNTTED STATES PATENT QFFTCE.

ARATIA W. HARRIS, 0F LINTON, INDIANA.

MINING-TOOL.

To all whom it may concern:

Be it known that I, A.RATIA W. HARRIS, a citizen of the United States, residing at Linton,-in the county of Greene and State of Indiana, have inventednew and useful Improvements in Mining-Tools, of which the following is a specification.

This invention relates to mining tools, and has particular application to certain novel and useful improvements in a device of the class described adapted particularly for breaking down coal, ore, slate, and the like in mines.

In carrying out my invention, it is my purpose to provide a tool or device, in the nature of a wedge which is designed to be inserted in bores or holes near the roof or top of a vein or body of coal, or the like, which has been cut or undercut, so that when the device is actuated as hereinafter described, the coal may be easily and readily broken down without resort-ing to the use of high explosives, thereby not only obviating the danger attendant upon the use of such explosives, but I also obtain coal in better condition.

It is also my purpose to provide a mining tool which will embrace in its construction the desirable features of simplicity, strength and durability, and another object of my invention is the provision of a tool which will be effective in its operation and which may be manufactured and marketed at a relatively low cost.

With the above-recited objects and others of a similar nature in view, the invention consists in the construction, combination and arrangement of parts, set forth in and falling within the scope of the appended claims.

In the accompanying drawing :-Figure 1 is a perspective view of a mining tool embodying my invention. Fig. 2 is a perspective view of the angular wedge carrying plate. Fig. 3 is a cross sectional view, taken through the two edge members on the line 33 of Fig. 1. Fig. 4 is a front view of my device with the screw shaft and nut on the latter shown in vertical cross section.

Referring now to the accompanying drawing in detail, the numeral 5 designates a metallic bar or plate, having longitudinally extending guide flanges 6-6 along the edges thereof, and at one end the plate is provided with an extension member or wall 7, formed at right angles thereto, and preferably in- Specification of Letters Patent.

Application filed May 26, 1911.

Patented Nov. 14:, 1911.

Serial No. 629,542.

tegral therewith. When the tool is in use, the plate 5 extends horizontally into the bore or hole, the plate or extension 7 being arranged vertically and forming the front of the wedge carrying and guiding portion of the tool.

The numeral 8 indicates the lower wedge of the tool which is designed to ride along the base plate between the guide flanges thereof, the relatively wide or butt end of the wedge extending inward, while at the narrow end said wedge is connected to one end of the screw rod 9, said rod projecting through an aperture 10 in the vertical wall of the guiding member, said aperture being arranged adjacent to the horizontal plate. This screw rod extends a desired distance outward from the vertical plate or wall and has threaded thereon a nut 11 provided circumferentially with bores or sockets 12 for the reception of the end of a turning bar by means of which said nut may be turned to draw the wedge toward the vertical wall of the device.

The top member of the wedge is shown at 13 and is oppositely disposed relative to the lower wedge, that is to say, the widened portion of the upper wedge extends above the narrow end of the lower wedge, the inclined faces 14 and 14 of the upper and lower wedges, respectively, being brought into contact. Upon the inclined face of the lower wedge, I form grooves 15, one at each side for the reception of the guide lugs 16 carried at the narrow end of the top wedge member. At its widened end, this top member is provided with a T-shaped head 17 designed to be inserted through the vertically extending longitudinal slot 18 formed in the vertical wall of the guide member, said head locking the wedge member to said wall when said wedge is turned to its normal position.

From the above description, taken in connection with the accompanying drawing, the construction and manner of employing my mining tool will be apparent to those skilled in the art. In employing the device,

vice end-to-end thereby expanding the tool and forcing the body of coal to break down the same.

It will beseen that I have provided a simple yet effective device which is adapted to be employed especially in coal mines for breaking down the coal instead of resorting to the use of dangerous explosives.

Having thus described the invention, I claim 1. A mining tool comprising a guiding member, a wedge section having a parallel face resting on theguiding member, a second wedge section having an inclined face adjacent to the inclined face of the first wedge section, an extension on the guiding member having a slot therein and an aperture below said slot, a head projecting from the second wedge member and extending through the slot, and a rod connected to the first wedge section and projecting through the aperture.

2. A mining tool comprising a base member having guide lugs extending longitudinally of the sidev edges thereof, a wall at one end of the base member and extending at an angle thereto, a lower wedge member sliding on the base, an upper wedge member on the lower wedge member having a projection extending through the wall, a

threaded rod projecting through said wall and connected to the lower wedge member, and a nut threaded on said rod.

3. A mining tool comprising a base plate having guide lugs extending longitudinally of the side edges thereof, a second plate at one end of the base plate and extending at right angles thereto, said second plate having an elongated slot formed therein and an aperture spaced apart from the slot, a lower wedge member sliding on the base plate and having grooves for receiving the guide lugs, a top wedge member sliding on the lower wedge member and provided with projecting lugs adapted to move in grooves formed longitudinally in the sides of the lower wedge member, a head carried by the top member adapted to extend through the slot in the end plate, a screw rod carried at one end of the lower wedge member and extending through the aperture in said end plate, and a nut threaded on said rod.

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

ARATIA W. HARRIS. Witnesses:

GEO. W. SHARP,

DAVID MOPHAIL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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