Improvements relating to Rock-drills.
Year: 1889

page_text: te of Application, 10th Dec., 1889-Accepted, 11th Jan., 1890
COMPLETE SPECIFICATION.
Improvements relating to Rock-drills.
I, PER ANTON CRCELIUS of Engelsberg in the Kingdom of Sweden, 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 relates to diamond rock-drills, the frame of the drill being so
arranged that rotary motion can be imparted to the drill either by hand power or by
transmitting power to the driving shaft from a horse-gear, and electric motor or
other machine, and so that the drill can, without any impediment being offered by
the driving power, be easily turned in different directions and advanced or retired.
In combination with the said frame I provide a lifting apparatus for hoisting the
drill out of the hole or bore.
In the accompanying drawing the frame and the lifting apparatus are represented
as combined, although the latter constitutes a separate part, which may be dis-
connected from the frame and, when desired, again connected thereto.
Figure 1 of the drawing is a side view partly in section of a rock-drill provided.
with my improvements and
.
Figure 2 is a front view of the same.
Figure 3 is a plan with the drill in the same position as in figures 1 and 2.
Upon a framework consisting of two standards A and oblique stays B, and
which framework may be raised or lowered by means of the loose foot pieces U,
both shafts D are supported. These shafts D, the bearings of which are adjustably
fixed to the standards A, are connected with each other by means of the inter-
mediate piece E, which at the same time embraces the boring tube F. From the
shafts D the power is transmitted to the boring tube by means of bevel gear a and b,
and along the boring tube is placed a strip c which at both its ends is fixed to
the same, passing through a slot in the pinion 6 for the purpose of serving as a key.
The intermediate piece E can, together with the boring tube, be swung around the
shafts D and, by tightening the pressure screws d, conveniently applied, be secured in
the required position. For feeding the boring tube I provide a bow-shaped
holder G passing through a sleeve H made integral with the intermediate piece E.
The bow-shaped holder G embraces the boring tube at both ends, and is firmly fixed
to the same.
The holder is also provided at its ends with pulleys H¹ over which run
cords 'g attached at one end to the frame and passing around the pulleys are
respectively wound upon drums K, the shafts of which are supported by arms.
projecting from the intermediate piece E. The drums are rotated independently by
means of levers L and L', each carrying a pawl engaging with a toothed wheel fixed
to the drum and secured by a detent pawl. By turning either of the drums so as to
wind up the rope upon the same, the holder with the boring tube can be moved
longitudinally in either direction. The lever L¹ serving to lower the boring tube
may conveniently be provided with a weight in order to effect a uniform feed. The
pawl on the lever L' and the teeth of the corresponding wheel must obviously be
arranged in the opposite direction to that of the pawl and wheel shewn in
Figure 1.
The lifting arrangement consists of a jack-shaped trestle the four legs A¹ of which
are connected below in pairs by means of curved connections a¹ which rest against
the tubular parts of the intermediate piece which embrace the shafts D. Straps b¹
fixed to the legs A¹ on one side by means of a hook c¹ and on the other side by
means of a wedge d' inserted between a hook resembling the hook c¹ and the hook
shaped end of the strap form, together with the connections a¹, hoops embracing the
intermediate piece E and in this way the frame A' is firmly united to the said

page_text: intermediate piece and swings with it around the shafts D. At the top the legs A¹
are united by means of a connecting piece B¹ the ends of which likewise pass through
the ends of a brace C¹ extending for some distance along the boring tube. In the lower
end of the said brace C₁ and in the connecting piece Bare holes through which the
boring tube is passed. Between the two sides of the brace C₁ is a ring D¹ fixed by
means of pivots through which ring the boring tube passes freely and on its pivots
the lever E is pivotted. Over the boring tube are also passed arms and G¹ which
by means of links Hare connected with the lever E¹. The arms slide easily on the
boring tube and if the lever Ebe oscillated like a pump-lever, they will be caused to
slide easily downwards on the boring tube but will grip the tube when moved upwards
so that the tube follows their movement. When the lever. E¹ is moved downwards,
the boring tube is thus drawn upwards by the arm Fand when the lever is moved
upwards the tube is brought upwards by the arm G'. As before stated the lever E¹
is supported by the brace C as this supports the pivots on which the lever turns. The
brace is firmly connected at its top with the frame A. The entire lifting apparatus
can thus be placed upon the boring tube and fixed to the boring frame by means of
the straps b¹ or disconnected from it.
Having now particularly described and ascertained 'the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :
(1.) A diamond boring frame consisting of two shafts D arranged in a line and
supported in bearings firmly fixed or movable in a jack-shaped frame, which shafts are
united by means of an intermediate piece E that can be turned upon the shafts and
likewise embracing the boring tube F and constituting a support for a pinion 6 fixed
on the boring tube and gearing with a corresponding wheel a on the shafts D.
(2.) In a boring frame of the kind referred to in claim 1 an arrangement for
advancing the drill in a longitudinal direction consisting of a bow shaped holder G
passing through a sleeve H on the intermediate piece E, the ends of which holder.are
firmly connected with the boring tube F, and of pulleys Hlocated at the ends of the
holder and around which run cords g which at one end are fixed to the frame and at
the opposite end are wound upon drums K supported by the intermediate piece and
which drums may be turned round by any convenient lever arrangement.
(3.) In a boring frame of the kind referred to in claim 1, an arrangement. for
hoisting the drill consisting of a jack-shaped trestle A' fixed to the intermediate:piece
from the outer end of which trestle descends a brace C¹ embracing the boring tube
and of one or more arms (F' and G¹) loosely embracing the boring tube, the outer
ends of which arms. are by means of links H connected with a lever E¹, the pivots
.of which are fixed in the brace so that the arms being oscillated by means of the lever
can when moved in one direction slide on the tube and when moved in the opposite
direction grip the tube and move it upwards.
Dated the 10th day of December 1889.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.