An Improved Boring Machine for Use in Coal or Ironstone Mines or. the like Places.
Year: 1893

page_text: 1 Date of Application, 11th Dec., 1893
Complete Specification Left, 11th Sept., 1894-Accepted, 13th Oct., 1894
PROVISIONAL SPECIFICATION.
An Improved Boring Machine for Use in Coal or Ironstone Mines or.
the like Places.
We, ABRAHAM GRAY, Manager, and GEORGE TARBIT, Engineer, both of the
South Skelton Mines, Boosbeck, in the County of York, do hereby declare the
nature of this invention to be as follows:-
Our invention relates to a machine for boring or drilling holes into coal, iron-
stone, or the like minerals, and refers more especially to that type of boring
machines in which the drill is applied in the required, direction by hand power into
the face of the working in coal or ironstone mines in order to bore holes therein for
the reception of some blasting material.
The object of our invention is to increase the efficiency of such machines mainly.
by applying a rotary and advancing movement to the drill which is a continuous
instead of an intermittent motion, and to effect this by a simple combination and
arrangement of parts by which the requisite power can be applied by hand.
A boring machine constructed according to our invention.consists as follows :—
The drill which is pointed into the face of the coal or ironstone fits into a screw
shaft so as to abut endwise against it, which screw shaft is encased for part of its
length in a tube, the outer end of which tube is supported in a socket which is fixed in¨
a strut erected in any position by driving the sharp end thereof into the floor or side
of the working face to take the thrust of the drill which is transmitted to it from:
the screw shaft tube. The inner end of the screw shaft tube abuts against a feed
but which is rigidly fixed endwise between the said screw shaft tube and what we:
term the propeller tube or its bush. Towards the other end of the propeller tube
is mounted the driving gear framing. These several parts which combinedly make.
up the full length of the screw shaft casing are so fitted together that no end wise or:
lateral movement relatively to each other is possible.
The driving gear frame is constructed to carry a pinion shaft set at right angles.
to the screw shaft so that a bevel pinion attached thereto can be geared into a bevel.
wheel secured to the propeller tube. In order to apply hand power to the machine.
the bevel wheel shaft is furnished with a crank handle by the turning of which a
continuous rotary motion is imparted to the propeller tube. It is essential that
the screw shaft which is carried round with the propeller tube shall also be capable.
of combining therewith a lateral or in and out movement. This may be effected by:
any suitable means, such as by providing longitudinal ridges on the one fitting into.
grooves or keyways in the other.
The lateral movement which the screw shaft necessarily derives from its rotary.
motion is due to the feed nut which is so fixed in position that neither a lateral nor.
a rotary movement can be imparted to it. But in order to enable the screw shaft
to be thrust back to the inward position without the tedious necessity of applying.
the reverse rotary motion, we prefer to so construct the feed nut that it can be put
out of gear with the screw shaft, which can then be simply thrust straight back to
the inward position as if no thread were on it. To effect this we construct the feed
nut in two parts adjustably connected together by pins fitting into slots placed
eccentrically in a disc attached thereto so that by turning the disc about its centre
to the right or left by means of a lever, the eccentricity of the slots is brought into

page_text: action and the separate parts of the feed nut are forced apart clear of the screw
shaft or are closed together to gear therewith as the case may be.
Dated this 9th day of December 1893.
G. J. CLARKSON,
Chartered Patent Agent, Stockton-on-Tees,
Agent for the Applicants.
COMPLETE SPECIFICATION.
An Improved Boring Machine for Use in Coal or Ironstone Mines or
the like Places.
We, ABRAHAM GRAY, Manager, and GEORGE TARBIT, Engineer, both of the
South Skelton Mines, Boosbeck, in the County of York, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
Our invention relates to a machine or apparatus for boring or drilling holes into
coal, ironstone, or the like minerals, and refers more especially to that type of boring
machines in which the drill is applied in the required direction by hand power into
the face of the working in coal or ironstone mines in order to bore holes therein for
the reception of some blasting material.
The object of our invention is to increase the efficiency of such machines mainly
by applying a combined rotary and forward motion to the drill which is continuous
instead of an intermittent motion and to effect this by a simple combination and
arrangement of parts by which the requisite power can be applied by hand.
A boring machine constructed according to our invention is illustrated in the
annexed sheet of drawings, in which Figure 1 is a longitudinal sectional view of the
machine in the working position with the drill in the inward position ready for a
fresh insertion. Figure 2 is a corresponding view in plan, and Figures 3 to 6
inclusive are enlarged views of some of the details.
The drill a which is pointed into the face of the coal or ironstone fits into a screw
shaft b, so as to abut endwise against it, which screw shaft is encased for part of its
length in a tube c, the outer end of which tube is supported in a socket which is
fixed in a strut d erected in any position and by any suitable means such as by
driving the sharp end thereof into the floor or side of the working face to take the
thrust of the drill, which is transmitted to it from the screw shaft tube, but the
means employed for effecting the support of the outer end of the machine in this
manner form no part of this invention and may be modified or varied as may be
necessary or desirable. The inner end of the screw shaft tube c abuts at c against
a feed nut e which is rigidly fixed endwise between the said screw shaft tube and what
we term the propeller tube or its bush f. Figures 3 and 4 illustrate the feed nut e;
Figure 4 being a sectional view on line of Figure 3, and Figures 5 and 6 illustrate
the propeller tube or bush f, Figure 5 being a sectional view on line
Figure 6. Towards the other end of the propeller tube f is mounted the driving
gear framing g. These several parts which combinedly make up the full length of
the screw shaft casing are so fitted together that no end wise or lateral movement
relatively to each other is possible.
of
...The driving gear frame g is constructed to carry a pinion shaft h set at right
angles to the screw shaft b, so that a bevel pinion attached thereto can be geared
into a bevel wheel 2 mounted on and secured to the propeller tube f. In order to
apply hand power to the machine the bevel pinion shaft h is furnished with a crank
handle by the turning of which a continuous rotary motion is imparted to the
propeller tube and by this means the drill a is continuously rotated as it is urged
forward. But where the direct connection of the crank handle to the shaft of the
bevel pinion affords too little purchase to work the drill with facility we provide
a second shaft ; geared by the spur wheels to the pinion shaft h as shown in
i..

page_text: Figure 1 and thus obtain the power required. It is essential that the screw shaft b
which is carried round with the propeller tube ƒ shall also be capable of combining
therewith a lateral or in and out movement. This may be effected by any suitable.
means such as by providing the longitudinal internal ridges on the propeller
tube f, fitting into the grooves, or keyways 6' on the screw shaft b.
The lateral movement which the screw shaft 6 necessarily derives from its rotary
motion is due to the feed nut e, which is so fixed in position that neither a lateral
nor a rotary movement can be imparted to it. But in order to enable the screw
shaft to be thrust back to the inward position without the tedious necessity of apply-
ing the reverse rotary motion to that which urged it forward, we prefer to construct
the feed nut e in the manner shown in Figures 3 and 4, so that it can be put out of
gear with the screw shaft, which can then be simply thrust back to the inward
position as if no thread were on it. To effect this we modify the construction of the
nut as described in our Provisional Specification and which we have since found is
not entirely reliable for the purpose of our invention, and construct the nut in two
parts confined within a casing or frame by means of a stud e and screwe
which is secured by means of a pin and collar in the half nut e³, so that it can freely
rotate therein whilst being screwed through the boss e on the frame e³. The con-
struction of feed nute as will be readily seen affords a simple and effectual means
for closing the two half nuts eles upon the thread of the screw shaft b or of with-
drawing them therefrom as the case may be.
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 :-
A machine or apparatus for boring or drilling holes into coal, ironstone, or the like
minerals, in which the drill can be operated by hand power with a continuous com-
bined rotary and forward motion, the machine being constructed, arranged and
operating substantially as hereinbefore described with reference to the accompany-
ing drawings.
Dated this 10
100%
G. J. CLARKSON,
Chartered Patent Agent, Stockton-on-Tees,
Agent for the Applicants.