Certain Improvements in Drilling Apparatus.
Year: 1892

page_text: Date of Application, 20th Dec., 1892
Complete Specification Left, 19th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Certain Improvements in Drilling Apparatus.
We EDWARD HENRY WHITE of 19 Alexandra Road Heeley Sheffield in the
County of York Engineer and JOHN LEE RODGERS of 84 Cherrytree Road.
Sharrow Sheffield aforesaid Engineer do hereby declare the nature of our invention
to be as follows:-
Our present invention relates more especially to apparatus for drilling or boring
holes in coal rock or other mineral and generally known as hand coal or rock
drilling machines and has for its object to arrange means whereby the feed screw
may be removed or replaced without it being necessary to take away the drill or
tool and also to so improve the feed screw pipe or covering that its length may be
adjusted at will thus obviating the necessity of a large amount of packing which
has generally to be employed in ordinary drilling apparatus where the distance
between the face of the mineral being bored and the face of the back rest is greater
than the length of the feed screw covering to attain which we make the tool or
drill holder separate from the feed screw and fix the said holder to the end of the
feed screw by means of a set screw. The thread for the reception of the ratchet
wheel is made upon a projecting part of the drill or tool holder and a plain part of
the feed screw with an annular recess at the end fits into a hollow formed in the
said tool holder and the set screw which secures the holder to the feed screw presses
with its end into said annular groove.
We employ an additional covering pipe or tube which fits over and may be
adjusted upon the ordinary covering tube. The end of said ordinary covering tubc
holds the feed screw nut in the usual way. The outer end of our improved telescopic
adjustable tube is made with an ordinary centre point or projection and the opposite
end has a split flange over which is arranged a spring or other clamp secured by a
screw or other suitable mechanical means.
Dated this 19th day of December 1892.
H. F. BOUGHTON, M.I. Mech. E.,
15, Commercial Street, Sheffield, Agent.
COMPLETE SPECIFICATION.
Certain Improvements in Drilling Apparatus.
We EDWARD HENRY WHITE, of 19 Alexandra Road, Heeley, Sheffield, in the
County of York, Engineer, and JOHN LEE RODGERS, of 84 Cherrytree Road,
Sharrow, Sheffield aforesaid, 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 :-
Our present invention relates to apparatus used for drilling or boring holes in
coal, rock or other minerals, such apparatus being generally known, as hand rock or
coal drilling machines, and the objects of our invention are to arrange means whereby
the feed screw may be removed or replaced without it being necessary to take
away the drill or tool, and the drill may be worked either without feed or with less
degree of feed as required; and to so improve the feed screw pipe or covering
that its length may be adjusted as required, thus obviating the necessity of a large
amount of packing, which has generally to be employed in ordinary drilling
apparatus where the distance between the face of the mineral being bored, and
the face of the back rest, is greater than the length of the feed screw covering; to
[Price 871

page_text: attain which we construct our improved drilling apparatus substantially as set forth
in the accompanying sheet of drawings in which
Fig. 1 is a longitudinal sectional elevation of our improved drilling apparatus,
and Fig. 2 is a similar elevation of said apparatus looking at right angles of
Fig. 1.
Similar letters of reference denote corresponding parts in each view.
The tool or drill holder A is made separate from the feed screw B, and the said
drill holder A is fixed to the turned end of the feed screw B by means of a set
screw C, which is threaded through the side of the tool holder A. The screw
thread for the reception of the ratchet wheel D is formed upon a projecting
part a' of the tool holder A. The plain part or end of the feed screw B
is formed with an annular recess 62, into which the end of the set screw C fits.
Our said improved drilling apparatus is constructed with an additional covering
pipe E, which fits over and may be adjusted upon the ordinary feed screw
covering tube G, which latter holds the feed screw nut H in the usual manner.
The outer end e' of the additional covering pipe or tube E is made with an ordinary
centre point e³, and the opposite end is formed with a split flange arranged in the
form of a clamp es, which receives a screw j. The handle K is preferably secured
to the tool holder A by its end being placed into a socket a' and secured by a set
screw at, by which means the said handle may be fixed in any convenient position
as will be well understood. When it is required to remove or replace the feed
screw B it is only necessary to unscrew the set screw C and pull out the said feed
screw B from the tool holder A, leaving the latter with the tool L in position; and
in cases where it is desirable to let the drill work without feed, or with but little
feed, it is only necessary to either unscrew the set, screw C fully or partially, if the
latter, the friction of the set screw in the recess 63 causes the feed screw B to move
but slightly. Where the distance between the face of the mineral M being drilled
and the backing N is greater than from M to P, the tube E can be moved to
position shown, and clamped on the covering G by means of the screw j, thus
dispensing with the use of additional packing which is necessary with drilling
apparatus constructed in the ordinary way. In some cases we form the additional
covering pipe E with a series of holes et so. that should an extra resistance be
required than can be obtained by the clamp e³, a rod or pin can be placed behind
the end of covering G, and rest in two of said holes e*.
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 drilling apparatus such as described and illustrated the combination with a
tool holder A of a set screw C, arranged to secure the feed screw B thereto
substantially in the manner described.
2. In a drilling apparatus such as described the combination with the ordinary
feed screw covering G of an additional covering pipe E arranged with a clamp e
and screw ; or its equivalent substantially as described and for the purpose
specified.
Dated this 18th day of September 1893.
H. F. BOUGHTON, M.I. Mech. E.,
Commercial Street, Sheffield, Agent.