Improvements connected with Rock Drills.
Year: 1893

page_text: Date of Application, 30th Mar., 1893
Complete Specification Left, 30:h Dec., 1893-Accepted, 3rd Feb., 1894
PROVISIONAL SPECIFICATION.
Improvements connected with Rock Drills.
I, WILLIAM CHARLTON, of Guisborough, in the County of York, Mining
Engineer, do hereby declare the nature of my said invention to be as follows:-
In mining operations in which ratchet drilling machines are used, the usual
method is to fix a prop between the roof and the floor of the seam of ironstone or
other mineral. The pointed end of the barrel is set against the prop, and the drill
end against the rock to be bored.
My invention consists in supporting the free end of the drill by means of a bar
of iron or steel (preferably) of about 18 inches to 24 inches in length, and 1 by
1inches in section, and having a number of holes in the bar, for receiving and
supporting the pointed end of the barrel. The bar is chiselended or pointed at
one end, and this end is driven into the solid rock or mineral (after a small hole has
been made with the pick) and the projecting portion of the bar forms the stand for
the ratchet machine.
By the use of this bar the usual prop is rendered unnecessary, and the time
hitherto expended in fixing the prop, or other kind of stand, is saved; the men
being thereby enabled to drill more holes in their shift, and increase their output..
Dated 30th March 1893.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
Improvements connected with Rock Drills.
I, WILLIAM CHARLTON, of. Guisborough, in the County of York, Mining
Engineer, do hereby declare the nature of my said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement:-
In mining operations in which ratchet and similar drilling machines are used, the
usual method is to fix a prop between the roof and the floor of the seam of
ironstone, or other mineral. The pointed end of the barrel is set against the prop,
and-the-drill-end-against-the-rock-to-be-bored.
My invention consists in providing a substitute for the prop, for supporting the
free end of the drill, by means of a bar of iron or steel, having a number of holes
or countersunk recesses for receiving the point of the barrel.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings, in which
similar figures of reference indicate corresponding parts.
Fig. 1 is a plan showing the application of my invention to rock-boring, and
Figs. 2, 3 and 4 are modified forms of the bracket.
3 is the barrel of the drill, 4 is the nut collar, 5 the screw spindle, 6 the ratchet,
and 7 the drill end. The bracket or bar 10 is chisel pointed at 14, as shown in
Fig. 14; and is formed with a number of holes or countersunk recesses 9, for
receiving the barrel end 8 of the drill.
In situations where the direction of the hole to be drilled is such that the simple
straight bar 10 cannot be used alone, one of the modifications shown in Figs. 2, 3
01

page_text: and 4 may be used. The long bar 11 (Fig. 2) is chisel pointed at the end 12, as
shown in Fig. 2B. 15 is a short bar with holes or countersunk recesses 9, and with
a socket 13, (shown in elevation in Fig. 2C) capable of sliding upon the bar 11 to
any convenient position.
In Fig. 3 the socket 13 is shown formed in the bar 11, the latter being chisel
pointed, as shown in Fig. 3º. In this socket the bar 10 (Fig. 1) may be inserted,
as shown in Fig. 3; or the joint may be otherwise formed; or the bracket may be
made right-angled, in one piece, as shown in Fig. 4; the end 12 being chisel
pointed, as shown in Fig. 4.
In using the apparatus, small holes are first made in the rock with a pick or
similar tool to receive the chisel ends; the bars are then driven in, and the drill
placed in position for boring.
My invention renders the use of ordinary props and stretcher-bars unnecessary,
and the time hitherto expended in fixing the prop, stretcher, or other kind of
stand, is saved; the men being thereby enabled to drill more holes in their shift,
and increase their output.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
--
1. The improved method of mounting rock drills, substantially as herein before
described and illustrated by the drawings.
2. In operations connected with rock drills, the application and use of brackets,
formed in one or two parts, and driven into the rock, so as to support the barrel
end of the drill, and dispense with ordinary props, stretchers, or other stands,
substantially as herein before described and illustrated by the drawings.
3. The improvements connected with rock drills, substantially as and for the
purposes described.
D1 001 T
1000