Year: 1888

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 to be as
follows:-
In the Specification of a prior Patent granted to us dated the 22nd day of August
1885 No. 9985 we described a rock drill and carriage. The present invention relates
to improvements upon that machine.
In the former apparatus a turbine for driving the drill was situated at the forward
end of the bar carrying the drill. According to the present invention we place the
engine at the rear end of this har so that it acts as a balance for the drill and thereby
lightens the apparatus avoiding the necessity of a counterbalance weight-in place of
employing a turbine driven by water as the motive power we employ an engine with
a pair of oscillating cylinders driven by compressed air.. The oscillating cylinders
drive two cranks upon a crank shaft which carries a bevelled pinion gearing with a
bevelled pinion at the end of a shaft inside the rod (which is hollow) carrying the
drill. The other end of this shaft carries a bevelled pinion which gears with a bevelled
pinion at one end of a short transverse shaft (corresponding to the turbine shaft of
the former apparatus) whose other end carries a bevelled pinion gearing with the
bevelled pinion driving the drill. In other respects the manner in which the drill
is mounted and driven is similar to that employed in the former apparatus.
In place of supporting the semi-circular worm wheel which carries the long bar
and the drill upon a single column we now support it between a pair of columns an
arrangement which gives a much steadier support. We provide the bar carrying the
drill with a screw thread working in a nut actuated by a ratchet, so that the bar can
be worked backwards and forwards and the distance of the drill from the pillar can be
varied. In some cases we place the worm wheel and worm for revolving the pillar
below instead of above the body of the carriage.

page_text: We sometimes employ the engines which actuate the drills also to drive the carriage
from place to place in the mine. In which case the air is supplied from a reservoir
carried on the carriage. For this purpose we provide a chain wheel the shaft
upon
in the hollow rod, and also a shaft and chain wheel upon a longitudinal axis on the
carriage, and we connect the two by a chain which is so made as to be readily
removable when the drill is at work, but can be put on when it is desired to move
the carriage. The longitudinal shaft upon the carriage actuates the wheels in any
convenient manner.
Dated thi azıl 1
1
1000
COMPLETE SPECIFICATION.
Improvements in Rock Drilling Apparatus.
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:-
•
The present invention relates to improvements on the rock drilling apparatus
described in the Specification of our former patent dated the 22nd day of August 1885,
No. 9985.
The improved machine is represented by the annexed drawings.
Figure 1 is an elevation partly in section.
Figure 2 is a plan also partly in section and Figure 3 is an end elevation.
A is an air receiver mounted on a frame with wheels, it serves to carry the mechanism
and also to supply air to work it but mainly to enable the apparatus to travel from
place to place. Flexible air pipes may be used to charge the receiver from a com-
pressed air main and also to supply air to the engines when boring either directly or
from the receiver.
In many cases the air receiver will not be required and then the carriage may be
constructed as shown in our former Specification. B is a forked pillar mounted on
the carriage, it rests on the top of the air receiver where a surface C is provided to
support it. The stem of the pillar passes by a trunk through the receiver. D is a
worm wheel fixed upon the pillar beneath the air receiver a worm engages with it

page_text: A worm
and this can be turned by means of a hand lover and ratchet in this way the pillar is
rotated to bring the drill to the position desired. The forked pillar B carries the
axis of a tooth are or semi-circle E; the axis has a bearing on each side of the arc
and it gives a firm support to the parts which it carries. A worm engages with the
arc and by turning this worm by means of a lever and ratchet the part E can be set
so that the socket upon it may be made to incline to any angle required. F is a
hollow bar which is held in the socket on the part E. The bar has a screw
thread cut upon it but can slide through the socket. G is a nut with ratchet and
hand lever for turning it; the nut screws upon the bar F; it is fitted into a recess
provided for it in the socket upon the part E. By turning the nut longitudinal
motion is given to the bar. H is a worm wheel through which the bar F is able
to slide and it engages with it by means of a groove and feather.
which can be turned by a lever and ratchet engages with the wheel H and by
means of it the bar can be rotated to any position desired. I, I, are oscillating
compressed air engines carried upon the rear end of the bar F-the crank shaft of
the engine carries one of a set of bevilled wheels J J. This wheel J drives another
similar wheel on a rotating shaft passing through the bar F from end to end; at its
other extremity this shaft carries a third wheel J gearing with a fourth on a short
axis on which is also a wheel N driving other parts as hereinafter stated.
K is a
plate carried at the fore end of the bar F; it is provided with a ring and flange L
serving to hold upon it the circular plate M but in such a manner that it can be
turned upon it to any desired position and. then clamped by set screws. The plate M
carries the bearing in. which turns the short axes of two wheels J and N previously
mentioned. The plate M also carries bearings in which the drill is mounted.
wheel N on the short, axis gears with another wheel similarly lettered upon a sleeve
through which the boring bar passes. There is a screw thread on the boring bar.
The sleeve drives the boring bar by means of a groove and feather. The boring
bar advances as the hole deepens; this is brought about by the gear wheels O, O, and
the nut P on the boring bar Q. The gear is so arranged that the nut rotates at a
somewhat different speed from the sleeve. R is an universal joint and S is the
drill. The nut P is made to open to release the boring bar when it is required to set
it back. T is an endless chain driving from the shaft within the bar down to a
wheel which is fast with a bevelled pinion. This pinion can be made to gear with
one or other of two pinions on one of the axles of the carriage. U is the clutch
lever by which the pinions can be shifted along the axle upon which they can slide
but the axle engages with the pinions so that it turns with the driven pinion.
The
-
Amongst the advantages of the arrangement above described are the following:-
1. The motor engine serves to balance the drilling apparatus; these parts being at
opposite ends of the carrying bar F.
2. Any convenient type of motor can be employed.
3. The apparatus is very rigid and steady; the axis of the socket piece E supporting
the bar F having a bearing on both sides of the socket piece.
4. The bar F can be moved longitudinally through the socket piece to and in
adjusting the position of the drill.
5. The apparatus can be moved from place to place by the motor which actuates
the drill.
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 rock drilling apparatus the combination substantially as described consisting
of the bar F carrying at one end a motor engine and at the other end drilling
apparatus; the driving shaft passing through the bar and the intermediate support E
carrying such bar with the parts thereon and movable about vertical and
horizontal axes.
2. In rock drilling apparatus the combination substantially as described consisting
of the column B; the socket piece E with its axis carried by the column in two

page_text: bearings one on either side of the socket piece; the bar F carried by the socket
piece and adjustable therein; and the drilling apparatus and motor mounted upon
the said bar F.
3. In rock drilling apparatus the combination substantially as described consisting
of the bar F carrying a motor engine and drilling apparatus; and the support E
movable about vertical and horizontal axes and carrying the bar F in such
manner that it can be turned and also moved longitudinally in the socket of the
support.
4. In rock drilling apparatus the combination substantially as described consisting
of the air receiver A and the carriage; the column B; the socket piece E; the bar F
carrying the drilling apparatus and the motor engine; and the gear connecting the
shaft of the motor engine with the axle of the carriage so that the carriage may be
propelled by the said motor.
5. Rock drilling apparatus substantially as described and represented by the
annexed drawings.
DL: och LCN 1000