IMPROVEMENTS IN ROCK DRILLING APPARATUS
Year: 1885

page_text: We THOMAS HUGH BELL of Middlesbrough in the County of York Iron Master,
ADDISON LANGHORN STEAVENSON of Holywell Hall near the City of Durham
Mining Engineer and ROBERT CLOUGH of Page Bank Colliery Willington in the
County of Durham Engineer, do hereby declare the nature of our invention for
IMPROVEMENTS IN ROCK DRILLING APPARATUS," to be as follows:-
46
This invention has for its object improvements in rock drilling apparatus.
The apparatus consists of a carriage on four wheels adapted to run upon rails
and a hand wheel geared with one of the axles facilitates movement of the carriage
from place to place. There is also break gear by which the carriage can be locked
in working position.
Upon the carriage there is a central upright or column provided with a cross
arm to which the drill with its motor, a small turbine is clamped.
In order to place and retain the drill in its proper working position the following
provisions are made. First the column can be rotated upon the carriage by means
of a worm wheel up it and a worn engaging there with.-Second the cross arni
can be moved in a vertical plane about a stud or axis Third this stud or axis
can be moved vertically on the upright or column.
Fourth the cross bar can be
rotated about its own axis. Fifth the motor and drill can be clamped at any
point along the cross arm and Sixth the motor and drill can be turned about an
axis at right angles to the cross arm and then locked in place.
The cross arm has its bearing in a toothed arc which is capable of turning upon
a central stud or axis and this is clamped upon the column at any elevation which
may be necessary. The toothed are engages with a worm which serves both to
move it into position and to lock it when there.
The cross arm is thus made to incline either upwards or downwards to any
angle and to turn the arm itself there is another worm wheel fixed upon the arm
and a worm engages with the wheel. A face plate is clipped to the arm in any
required position and against this another similar face plate is fixed by a locking
bolt. To the latter face plate the turbine is directly secured.
The turbine has a bevilled pinion upon its axis and this can be made to engage
with one or other of two bevelled wheels which are cast together. The boring bar
passes through the boss of these wheels; it has a screw thread cut from end to end
and also a longitudinal groove with which a feather within the boss of the bevelled

page_text: wheel engages. In this way the boring bar can be rotated in either direction and
it is at the same time caused to move longitudinally through the boss by means of
a nut.
The nut by means of intermediate gear wheels receives movement from
the bevelled wheels mentioned above. The boring bar is thus caused to advance
as the work progresses. An universal joint connects the boring bar with the
drilling tool. The nut is made in two parts capable of being opened apart to free
the boring bar and admit of its being drawn back by hand.
The two parts of the nut are hinged or jointed together and the joint pin is
fixed in the face of a disc. A second pin inserted into holes in the disc and in the
two parts of the divided nut when the latter are closed together secures them in
place. There is a spring catch on this locking pin which has to be released before
the pin can be withdrawn.
The disc which carries the joint pin is mounted and is able to turn on the bush
of the bearing for the boring bar which also serves as the axis for the gear wheel
by which the nut is rotated.
The two parts of the divided nut when closed together embrace a neck upon the
bush.
i
Water under pressure is supplied to the turbine through pipes and a flexible
hose so that its position on the cross arm may be altered without interfering with
the water supply.
Another hose pipe leads the water away after it has passed through the turbine
to any place where it may be conveniently received.

page_text: We, THOMAS HUGH BELL of Middlesborough in the County of York Iron Master;
ADDISON LANGHORN STEAVENSON of Holywell Hall near the City of Durham
Mining Engineer and ROBERT CLOUGH of Page Bank Colliery, Willington in the
County of Durham Engineer 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:-
This invention has for its object improvements in rock drilling apparatus.
The apparatus consists of a carriage on four wheels adapted to run upon rails
and a hand wheel geared with one of the axles facilitates movement of the carriage
from place to place. There is also break gear by which the carriage can be locked
in working position. Upon the carriage there is a central upright or column
provided with a cross arm to which the drill with its motor, a small turbine
is clamped.
In order to place and retain the drill in its proper working position the following
provisions are made: First the column can be rotated upon the carriage by means
of a worm wheel upon it and a worm engaging therewith. Second the cross arm
can be moved in a vertical plane about a stud or axis. Third this stud or axis
can be moved vertically on the upright or column. Fourth the cross bar can be
rotated about its own axis. Fifth the motor and drill can be clamped at any point
along the cross arm-and Sixth the motor and drill can be turned about an axis
at right angles to the cross arm and then locked in place.
1
The cross arm has its bearing in a toothed are which is capable of turning upon
a central stud or axis and this is clamped upon the column at any elevation which
may be necessary. The toothed arc engages with a worm which serves both to
move it into position and to lock it when there. The cross arm is thus made to
incline either upwards or downwards to any angle, and to turn the arm itself
there is another worm wheel fixed upon the arm and a worm engages with the
wheel. A face plate is clipped to the arm in any required position and against
this another similar face plate is fixed by a locking bolt. To the latter face plate
the turbine is directly secured.
The turbine has a bevelled pinion upon its axis and this can be made to engage
with one or other of two bevelled wheels which are cast together. The boring bar
passes through the boss of these wheels; it has a screw thread cut from end to end
and also a longitudinal groove, with which a feather within the boss of the bevelled
wheel engages. In this way the boring bar can be rotated in either direction and
it is at the same time caused to move longitudinally through. the boss by means of
a nut. The nut by means of intermediate gear wheels receives movement from the
bevelled wheels mentioned above. The boring bar is thus caused to advance as
the work progresses. An universal joint connects the boring bar with the drilling
tool. The nut is made in two parts capable of being opened apart to free the
boring bar and admit of its being drawn back by. band.

page_text: box b at the bottom of the pillar. The water passes out from the pillar by the
hollow axis of the semicircular worm wheel F and so to a cavity through which
the bar E passes; this is closed at the ends by glands in which the bar E can turn.
The water passes into the bar E by perforations e e and from the bar to the
turbine by the passage j.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. Rock drilling apparatus consisting of a carriage on wheels carrying upon a
support which is universally adjustable a turbine together with a boring bar and
a drilling tool driven by the said turbine.
2. In rock drilling apparatus the carriage and adjustable support for the drill
and motor consisting of a platform on wheels a column on the platform, a
horizontal stud or axis adjustable up or down and around the column, an arc
moveable around the stud or axis and a cross bar carried by the arc and having the
motor and drill secured to it so that they may work in any desired position and
inclination.
3. Our rock drilling apparatus substantially as described.
CARPMAEL & Co.,
Agents for the Applicants.