US444140A - Charles h - Google Patents

Description

' llNlTED f STATES PATENT FFICE.

MINING-COLUMN.

SPECIFICATION forming part of Letters Patent No. 444,140, dated January 6,1891.

Application filed July 17, 1890. Serial No. 359,064. (No model.)

To all whom it may concern.-

Be it known that 1, CHARLES H. SERGEANT, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Mining-Columns, of which the following is a specification.

My invention relates to animprovement in mining-columns in which a pair of standards are united by two partsupper and lower cross-headswhich may be readily removed and adjusted for the purpose of increasing or diminishing to a considerable extent the length of the column.

The object is to provide simple and effective means for securing the upper end of the column in engagement with walls of varying angles, and at the same time transmit the thrust of the engagementof the column of the wall to the cross-head rather than to the pivotal connection of the engaging fork with the cross-head, and in general to provide a column which may be firmly adjusted and readily removed, and it may be readily adapted to a great variety of positions.

A practical embodiment of my invention is represented in the accompanying drawings, in which Figure 1 is a view of the column in side elevation, one-half of the upper and lower cross-head being removed. Fig. 2 is a transverse section through the line 00 0c of Fig.- 1, and Fig. 3 is a vertical transverse section through line y y of Fig. 1.

A represents the standards, which may be conveniently formed of pipinggas-piping, for example-and may be prepared in suitable lengths and kept conveniently'at hand, so as to accommodate the length of column approximately to the length of the distance of the walls with which its opposite ends are to be engaged. The opposite ends of the standards A are received in sockets 1), formed in the ends of the sectional upper and lower crossheads B and B. Each of the cross-heads B and B is made in two similar half-sections bolted together and drawn into close contact with the standards A by means of screw-bolts G, provided with nuts 0. Between the halfsections of the upper cross-head B the engaging fork D is centrally pivoted upon a bolt 01, its branches (1 projecting outwardly and upwardly from the central portion and being provided at. their ends with sharp edges (1 for the purpose of biting into the .hard wall of mineral. lowed considerable play upon the pivotal bolt (Z, and its lower central portion is rounded, as shown at d, and rests in close proximity to a curve-faced bearing-lug h on the cross-head B, so that when pressure is exerted to throw the edge 61 into contact with the wall of min eral the thrust will be received upon the concave face of the lug h before the forkD engages closely with the pivotal bolt d. This provides against any liabilty of springing or breaking the bolt d and renders it feasible to employ a much lighter bolt than where the weight is thrust upon the bolt itself.

Between the half-sections of the lower cross head B an internally-screw-threaded sleeve E is secured, the opposite ends e of said sleeve being enlarged and overlapping the upper and lower edges of the half-sections of the crosshead, as clearly shown in Fig. 1,whereby the said sleeve is prevented from vertical movement when the half-sections of the cross-head are bolted together.

WVithin the sleeve E a heavy screw F is seated, and is provided with a sharp point f for engagement with the wall of mineral and with a head f, provided with sockets or perforations f for the reception of a lever for the purpose of rotating the screw, and thereby forcing the sharp edges of the fork B and the point. f of the screw into engagement with the wall of mineral.

Whenever it is desired to adjust the column to a length greater than what can readily be provided for by the screw F, the bolt C may be loosened, the standards A removed, and a set of longer standards inserted in their places.

The column whichIhave herein shown and described is particularly well adapted for use in connection with an auger-supportsuch, for example, as that shown and described in an application executed and filed by me of even date herewith.

Vhat I claim as my invention is 1. The combination, with the standards and the cross-heads for securing the standards together, one of the cross-heads being formed in separable sections, of an engaging device pivotally secured between the separable sec- The engaging fork D is altions of the cross-head, and a bearing upon I the said cross-head with which the engaging device contacts when under strain before it contacts with its pivotal connection, the said sections of the cross-head forming'a guide for the engaging device intermediate of its hearing and engaging ends, and means for adjusting the column, substantially as set forth.

2. The combination, with an upper and lower cross-head, each formed in half-sections and provided with sockets at their opposite ends,of standards adapted to entersaid sockets for increasing or diminishing the length of the column, and engaging devices at the upper and lower ends of the column, substantially as set forth.

3. The combination, with a pair of standards, an upper sectional cross-head engaging the upper ends of the section, andalower sectional cross-head engaging, the lower ends of the standards, of an engaging fork pivotally secured between the sections of the upper cross-head and an engaging screw having a threaded connection with a sleeve, the latter being engaged between the sections of the lower cross-head, substantially as set forth.

CHARLES ll. SERGEAN".

Witnesses:

I). ll. HAYWOOD, L. N. LEGENDRE.

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