Improvements in and relating to Miners' Boring Machines.
Year: 1894

page_text: Date of Application, 31st Aug., 1894
Complete Specification Left, 31st May, 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Miners' Boring Machines.
We GEORGE SPENCER WATERFALL, Albion Works, Peacroft in the City of
Sheffield, Manufacturer, and CHARLES HENRY WOODS, 12 Kearsley Road
Sheffield aforesaid, Engineer, do hereby declare the nature of our invention to be
as follows:-
Our invention has for its object to improve the construction of boring machines
such as are used by miners for boring into bind or coal, and relates more
particularly to the frame or standard, and to the nut upon the main screw.
The machines are those worked by hand, and have an extensible frame that can
be adjusted in length to the required position, as is well understood.
We propose in the first place to improve the frame or standard by the use of an
improved clip which not only binds the parts together, but acts as a guide and
support for the sides of the extension part of the frame.
The extension frame we make to fit inside the frame proper, and the edges of
both parts are provided with recesses or gullets to hold a swivelling crosshead
which carries the nut and the main screw. The clip is an oblong ring made of flat
iron or steel, or cast in any metal suitable for the purpose.
It is made to receive the ends of the bars of which the frame is made, and is
rivetted thereto, the ends of the extension piece also pass through it, and we prefer
to construct the interior of the ring with stays across to prevent the sides of the
extension piece being compressed. The recesses or gullets are so arranged that
the crosshead carrying the screw can be placed and held in any position from top
to bottom.
We make the nut crosshead with tunnions or axles on each side of the body,
and we divide the body longitudinally through one side, which has two lugs upon
it and a bolt passing through them by which the body can be compressed. The
screwthreaded nut in which the main screw works, is also divided or split down one
side, and fits inside the body in such a manner that it is prevented turning round,
and is firmly secured by the beforementioned bolt, which we make oblong in its
cross section; it can also be contracted so as to fit tighter upon the screw as the
latter wears it away. The crosshead is so made that it can be passed through the
standards.
In some cases we use a split crosshead and a solid nut instead of a split one, and
we may supply the crosshead, nut and screw separately from the standard.
Dated the 27th day of August 1894.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.

page_text: We, GEORGE SPENCER WATERFALL, Albion Works, Peacroft in the City of
Sheffield, Manufacturer, and CHARLES HENRY WOODS, 12 Kearsley Road,
Sheffield aforesaid, Engineer, do hereby declare the nature of this invention and
in what manner the same bas to be performed, to be particularly described and
ascertained in and by the following statement :-
The
Our invention has for its object to improve the construction of boring machines
such as are used by miners for boring into "bind er coal, and relates more
particularly to the frame or standard, and to the nut upon the main screw.
machines referred to are those worked by hand having an extensible frame that
can be adjusted in length to the required position, as is well understood.
Our invention is illustrated in the annexed sheet of drawings in which:
Fig. 1, is a side elevation of a boring machine made according to my invention.
Fig. 2, front elevation of same.
Fig. 3, two views of the nut carrier, to larger scale.
Fig. 4, two views of the nut
Fig. 5, two views of the clip
do.
do.
The frame is usually made in two parts A, and B, one sliding within the other
longitudinally as will be seen in Fig. 2, the two side bars of B, being sufficiently
close together to enable them to pass within the side bars of the part A, this
method of construction being usual.
To ensure the necessary strength, the lower ends of the side bars of A, should be
firmly held to the required distance, and the bars B, require also to be supported
at this point.
and
To accomplish this we make a clip C, of special construction as shown in
Figs. 1, 2, 5; it is oblong in form and is divided into three openings C1, C2, and C³,
and the ends of the bars of the part A, are placed into the spaces C¹, and C³,
rest upon the two ledges C, and are secured in that position by screws or
rivets D.
There is then just sufficient room for the bars B, to pass between the bars A,
and the divisions or stays E, by which they are guided and also supported.
In boring machines'in which a tube is substituted for the lower part of the frame,
the configuration of the central opening C³, is made to receive the end of the said
tube which is secured by a crosspin, screws or other like means.
The cap F, upon the lower end of the frame is constructed to receive the ends
of the bars B, and may be made either with a screw G, as shown, or with a plain
bole to receive a tube before mentioned.
The crosshead or nut carrier H, is tubular and provided with trunnions I, on
each side; the body is divided on one side longitudinally through a rib J, by a
slit K, and a bolt is passed through the divided rib transversely by means of which
the tubular opening can be reduced in diameter.
The nut P Fig. 4, is made to fit the interior of the nut carrier, and it is also
divided longitudinally down one side, and is also provided with a recess M, for the
bolt to pass through, which will prevent it shifting in position in the nut
carrier H.
By this construction, any slackness in the fitting either of the screw in the nut,
or of the nut in the nut carrier, can be readily adjusted by means of the screw
bolt N, which when screwed up will cause these parts to contract.
A nut carrier H, of this construction when turned from its horizontal or normal
position to a vertical position, will pass readily between the sides of the frame to
enable the screw to be removed.

page_text: For some purposes the nut P, may be made solid, and the nut carrier only be
divided, but we prefer that both should be divided.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. In miners boring machines such as are shown in Figs. 1 and 2, a clip C,
constructed with two stays E, and ledges C₁ arranged for the purpose specified and
substantially as shown in Fig. of the drawings.
2. In miners boring machines such as are shown in Figs. 1 and 2, and like
machines, a nut carrier H, divided longitudinally down one side, and compressible
by means of a bolt N, in combination with a nut P, either made with a longitudinal
slit or made solid, for the purpose specified and substantially as herein before
described and shown in Figs. 3 and 4.
3. A miners boring machine for hand power made in two chief parts A, and B,
combining the improved clip C, for supporting and guiding the extensible frame-
work, and the improved nut P, and nut carrier H, arranged and constructed as
herein before described with reference to the annexed drawings.
Dated the 29th day of May 1895.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.