IMPROVEMENTS IN APPARATUS APPLICABLE TO ROCK DRILLS
Year: 1884

page_text: 1, JAMES STOCKS, of Ilkeston in the County of Derby, Smith do hereby declare
the nature of said Invention for "IMPROVEMENTS IN APPARATUS APPLICABLE TO
ROCK DRILLS" to be as follows:-
On the stem of a socket of suitable shape to receive the non-cutting end of a
drill, I place a toothed ratchet wheel between the forked ends of a hand lever, tho
said ends are drilled out so as to revolve on the stein next the socket, the lever is
provided with a spring pawl, which engaging with the teeth of the ratchet wheel,
enables the user to partially revolve the drill, at each to and fro movement of the
hand lever. The stem of the socket is screw-threaded, and takes into a screw-
threaded nut formed in one end of a cylindrical case in two halves, which are held
together at the nut end by a collar held in position by a set scrow, and at the
opposite end, the half cylinders are hinged together, the bottom being provided
with three or more pointed projections which press against any fixed body facing
the rock, coal, or other mineral to be drilled, such arrangement ensures the requisite
feed being given to the drill by the partial unscrewing of the stem from the nut at
each forward movement of the hand lever.
When the drill has cut into the substanco operated upon, nearly to a depth equal
to the length of the screwed stem, upon the set screw being unscrewed, the collar
can be taken off the nut, which may then be separated to clear the thread of the
stem, in order that it may be readily returned into the cylinder for a fresh operation
after the collar has been replaced upon the nut.
Dated this Ninth day of January 1881
H. W. GOUGH, C.E.,
For the Applicant.
COMPLETE SPECIFICATION.
I, JAMES STOCKS, of Ilkeston, in the County of Derby, Smith, do hereby declare
the nature of my Invention for IMPROVEMENTS IN APPARATUS APPLICABLE TO
ROCK DRILLS and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-

page_text: The apparatus consists of the following parts, a socket A one end of which is of
suitable shape to receive the non-cutting end of a drill, upon which I secure a
toothed ratchet wheel B, which lies between the forked ends C of a hand lever,
which ends are drilled out so as to revolve on the stem nearest the socket, the
lever is provided with a pawl C', which is kept engaged with the teeth of the
ratchet wheel by a spring C² secured to the hand lever, which enables the user to
partially revolve the drill at each to and fro movement. The stem of the socket is
screw threaded and takes into the screw threaded extremity of a cylindrical
sleeve D, formed of two half cylinders, which are held together at the feed end by
a collar which is secured in position while clamping the two halves of the sleeve
together by a set screw D at the abbutting end, the half cylinders are hinged
together and are provided with a bridle D³, the ends of which rock on two studs
secured in one of the half cylinders, this bridle allows the two half cylinders to be
separated sufficiently to clear the screw threaded stem, when it is being withdrawn
or inserted in the sleeve, the bottom of the sleeve is provided with two or more
pointed studs, which press into any fixed body facing the rock, coal, or other mineral
to be drilled and prevents the sleeve from turning round, such arrangement ensures
the requisite feed being given to the drill by the partial unscrewing of the stem
from the sleeve at each forward movement of the lever. When the drill has cut
into the substance operated upon, nearly to a depth equal to the length of the
screwed stem, upon the set screw being unscrewed, the collar can be taken off the
sleeve, which may then be opened to clear the thread of the stem so as to readily
return it into the sleeve for a fresh operation, after closing the sleeve and replacing
the collar upon it.
The screw threaded drill socket A, and the pawl C³ may be made of steel wrought
iron, or malleable cast iron.
The toothed ratchet wheel B, and hand lever C, of cast iron or malleable cast
iron, the spring C² of brass or steel, the collar D' of wrought iron, and the set
screw of wrought iron, or malleable cast iron.
Having now particularly described and ascertained the nature of iny said
Invention, and in what manner the same is to be performed, I declare that what
I claim is =
The construction and employment of a cylinder or sleeve in two parts, hinged
together at the abutting end, which is provided with pointed studs, and is screw
threaded at the feed end to receive the screw threaded stem of a drill socket, the
two halves of the sleeve being clamped together by a set screw, substantially as
herein before described and illustrated in the Drawings annexed.
Dated this Twenty-second day of September 1884.