An Improvement in Rock Drilling Machinery.
Year: 1889

page_text: COMPLETE SPECIFICATION.
An Improvement in Rock Drilling Machinery.
I, WILLIAM WALKER of Saltburn by the Sea, in the County of York. 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 :-
In my Specification No. 1657 of 1875 I described an arrangement of rock drilling
machinery mounted on a truck in such a manner that arins, carrying rock drills and
compressed air engines for working them, could be turned into various attitudes, at
various levels so as to drill where required in a working along which the truck could
be run.
My present invention relates to an arrangement of the truck and arins in such a
manner that the whole machine can be moved along and operated in narrow workings
and that the drill can be directed with facility to work at any angle and level, as I
shall describe referring to the accompanying drawings. Fig. 1 is a side elevation
Fig. 2 is a plan Fig. 3 is a central vertical section of a rock drilling machine accord-
ing to my present invention. On a wheeled truck A is mounted by a perch pin a
column B of-square or rectangular section, this column carrying the machinery
which can be turned round on the perch pin to any desired attitude.
On the top of the column B is mounted on a horizontal axis C a double framing D
which can be turned in a vertical plane and held in any desired attitude by clamping
its bearings on the axis C.
For the purpose of firmly holding it an are E attached to
the frame on either side or both sides can be secured by passing a pin into the
column B through one or other of a number of holes in the arc. To the two ends of
the frame D are pivotted at F four bell cranks the vertical or crank arms F1 of which
are connected by arms of a beam G to pins H fixed on the column B in such a
position that the distance between the centres of H and C is equal to the throw of the
cranks F. In consequence of this connection, forming a parallel motion, the
horizontal arms F of the bell cranks always remain horizontal however the frame D
may be turned on the axis C. On the arms F3 are pivotted by perch pins arms K
and to the ends of these are jointed by both vertical and horizontal joints cranked arms L
and L. The arm L carries the engine and drill M which is of the kind described in
the Specification No. 1657 of 1875 above referred to, and the arın L carries a
counterweight N adjusted to balance the engine and drill. The engine is itself
mounted on L by a tubular perch pin through which is conducted the compressed air
for working the engine. The arms K and L can be turned horizontally round their
respective joints and secured by pins passed through holes in arcs as shewn at D'
and K, and the engine and drill can be held in the desired attitude by clamping the
perch pin of the engine and the horizontal joint of the arm L. Thus, by moving
the frame D vertically, by turning the whole machine horizontally on its perch pin,
by turning the arms K and L and the engine M also horizontally, and by turning the
arm L vertically, the drill can be directed at any angle and level within the range of
the machine, and the counterweight N being moved always to a position corresponding
to that of the engine serves to balance it.
Moreover the arius K and L can be
folded so far inwards as to lie over the frame D, so that the whole machine with the
arms in this condition can be moved along any working capable of allowing passage
for the truck.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is.
A rock drilling machine consisting of a truck, a column mounted thereon by a
perch pin, a frame mounted by a horizontal axis on the column and having crank

page_text: arms governed by a parallel motion, and two sets of arms connected thereto by
vertical and horizontal joints, the one set of arms carrying a compressed air engine
and drill and the other set carrying a counterweight substantially as and for the
purposes set forth.
Dated this 17th day of Tub. 1000
ABEL & IMRAY..
Agent for the Applicants.