Improvements in Apparatus for Drilling Rocks, or Coal Getting, or for other analogous Operations.
Year: 1895

page_text: Date of Application, 16th Mar., 1895
Complete Specification Left, 16th Jan., 1876-Accepted, 22nd Feb., 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Drilling Rocks, or Coal Getting, or
for other analogous Operations.
We, WILLIAM HARDING SCOTT of Gothic Works, King Street, Norwich, in
the County of Norfolk, Electrical Engineer, and HENRY JOHN CUBITT KEYMER,
of P.O. Box 899 Johannesburg in the South African Republic, and of Gorleston
in the County of Norfolk, Mining Engineer do hereby declare the nature of our
invention to be as follows:-
The object of our invention is to provide an apparatus for drilling rocks, or for
coal getting, or for other analogous operations, which apparatus is simple in
construction, and efficient in action being capable of being driven by an electrical
motor (which can be combined therewith, as hereinafter described) and provided
with an arrangement which will prevent the jarring during action being injuriously
imparted to the working parts.
According to our invention the drill, and the means by which it is rotated, and
fed to its work, are carried in a cradle capable of being longitudinally moved along
a slide provided with trunnions supported in adjustable bearings on post supports
and struts at each side the said bearings being preferably hinged at top so that
they can be opened to enable the cradle to be lifted out. The said cradle is
adjustable and fixable at the desired angle by means of connecting rods and screws
or like devices by which it is attached to the struts. The drill is carried at one
end of a rod the other end of which carries a piston which is in a cylinder so
as to leave an air cushioning space at either side of the piston. This cylinder can
move longitudinally in guides in the slide which carries the drill operating mechanism
and the said cylinder is connected to a crank operated directly or by gearing from a
motor preferably an electric motor which is carried by the slide which carries the
drill operating mechanism. The field magnets of the said motor may be secured to
feet or a support bolted to the said slide and having a long bearing to carry a shaft
at the lower end of which is a gear wheel which drives a wheel conveying motion
to the aforesaid crank and thence to the cylinder containing the piston and through
the air cushion to the piston contained therein and to the drill. There may be a
gear wheel at each side so that should one get out of order the other can be
brought into use. Or the motor may drive the crank or its equivalent direct
without the intervention of gearing in which case the magnet cores of the motor
projection may be cast on or fixed to the sliding cradle. A partial rotary motion.
is given to the drill at each stroke by means of a spiral feather on the stem of the
piston engaging in a similar groove in a nut which is turned at the one stroke
through a partial rotation by the said spiral web but is during the other stroke
retained in position by a pawl engaging with a ratchet wheel formned on the said
nut so that the spiral web as it passes through the now stationary put causes à
partial rotation to be given to the drill. The other end of the shaft of the motor
carries an armature which rotates in proximity to the pole pieces carried by the
cores of the field magnets and it also carries the commutator and all may be enclosed
in a casing. The forward feed of the drill may be effected by a screw or screws
operating the slide in the cradle. The air cushion in the aforesaid cylinder is
preserved by making orifices in the cylinder which at a certain point in the stroke
communicate with an orifice in the guide in which it slides so as to admit air to
supply any which may have escaped, the air being confined to act as a cushion

page_text: during the other part of the strokes by reason of the non-coincidence of the said
orifices. A valve or valves may be arranged so that it or they open only when the
pressure in the cylinder is less than that of the atmosphere so that then air enters
to supply deficiency.
Dated this 16th day of March 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Apparatus for Drilling Rocks, or Coal Getting, or
for other analogous Operations.
We, WILLIAM HARDING SCOTT, of Gothic Works, King Street, Norwich, in
the County of Norfolk, Electrical Engineer, and HENRY JOHN CUBITT KEYMER,
of P.O. Box 899 Johannesburg, in the South African Republic and of Gorleston,
in the County of Norfolk, Mining 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 object of our invention is to provide an apparatus for drilling rocks, or for
coal getting, or for other analogous operations, which apparatus is simple in
construction and efficient in action, it being capable of being driven by an electrical
motor (which can be combined therewith, as hereinafter described) and provided
with an arrangement which will prevent the jarring during action being injuriously
imparted to the working parts.
We will describe the invention with reference to the accompanying drawing.
Figs. 1 and 2 are elevations at right angles to each other of the framing and
supports.
Fig. 3 is a longitudinal section of the drilling apparatus.
Fig. 4 is a plan of the apparatus in its frame and supports and
Fig. 5 is a section on the line 1. 2. Fig. 3.
According to our invention the drill A and the means by which it is operated
and fed to its work, are carried in a cradle or frame B. B2 arranged so that it can
be moved along a pair of slides constituted by the tubes C connected by the
pieces c, the said slides C being provided with trunnions D supported in bearings E
adjustable vertically on posts or struts F at each side, connected by the pieces f
and provided with the usual screws for fixing :-The said bearings E are preferably
provided with hinged covers at e which can be opened to enable the guides C and
parts carried thereby to be lifted out. The cradle and side frame or guides C. C.
are adjustable and fixable at the desired angle by means of connecting rods Fl
and screws G or like devices by which it is attached to the posts or struts F. The
drill is carried at one end of a rod H the other end of which carries a piston I
which is in a cylinder K (closed at each end) so as to leave an air cushioning
space at either side of the piston I. This cylinder can move longitudinally in a
guide B2 which is formed in the cradle or body of the apparatus and the said
cylinder K is connected to a crank L operated directly or by gearing from a
motor M preferably an electric motor which is carried by the cradle or body of
the apparatus.
The motor is shewn as driving the crank direct without the intervention of
gearing and the magnet cores of the motor being shewn as being cast on or fixed
to the body of the apparatus.
The said crank L reciprocates the cylinder K containing the piston I and
through the air cushion the piston contained therein and the drill carried by it are
reciprocated also. If preferred instead of operating the crank directly from the
motor it may be operated through gearing in any convenient way.

page_text: A partial rotary motion is given to the drill which may be done in the ordinary
way by means of spiral grooves feathers and a ratchet wheel as illustrated.
The electric motor may be of any suitable type operated by continuous, alter-
nating or rotary currents and preferably of a kind which can be completely cased
in as shewu. In the drawing for the sake of simplicity the brush gear is not
shown.
The forward feed of the drill may be effected by a screw or screws U operating
the drilling apparatus in the usual manner.
The air cushion in the aforesaid cylinder K is preserved by making orifices c
in the cylinder K which at a certain point in the stroke communicate with the.
atmosphere so as to admit air to supply any which may have escaped, the air being
confined to act as a cushion during the other part of the stroke or a valve, or valves
may be arranged so that it or they open only when the pressure in the cylinder is.
less than that of the atmosphere so that then air enters to supply deficiency.
In place of the crank being connected with the cylinder it may be connected to.
the piston and the cylinder to 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 apparatus for drilling rocks, coal getting, and like operation, the combina-
tion of a piston mounted in a cylinder so as to be practically in elastic connection
therewith, the one (either the cylinder or the piston) being driven by, or from, a
crank operated from suitable motor and the other having a percussion drill
connected to it and the whole being carried in a portable frame and being provided
with means for giving partial rotary movement to the drill substantially as berein-
before described.
2. The combination with an arrangement of piston, cylinder, drill and crank as.
claimed by the preceding claiming clause of an electric motor contained in, or
carried by, the frame of the drill; substantially as hereinbefore described.
3. The arrangement of frame or support and means for adjusting the position of
the cradle or drill carrying part of the apparatus substantially as and for the
purpose hereinbefore described and illustrated by Figures 1 and 2 of the
accompanying drawings.
4. The arrangement of frame or support so that the cradle or drill carrying
part of the apparatus is supported at both sides substantially as hereinbefore
described and shewn in Figures 1 and 2 of the accompanying drawings.
5. The arrangement and combination of parts constituting an apparatus for
drilling rocks, coal getting or like operations; substantially as herein before.
described and illustrated in the accompanying drawings.
Dated this 16th day of January 1896.
JOHNSONS & WILLCOX.