Improvements in Drilling Machines.
Year: 1888

page_text: Improvements in Drilling Machines.
We JAMES CONNOLLY and THOMAS CONNOLLY both of 65 Wharfdale Road, Kings
Cross, London N. Tyresmiths 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 invention has for its object to produce a machine which, whilst being well
adapted to the drilling of all classes of work, is specially applicable to the drilling of
the tyres of wheels; and, at the same time, by the means which we adopt for reversing
the position of the fly wheel and pulleys employed in connection therewith the machine
may be fixed in any suitable available space in a workshop, independent of the
position of the main driving shaft by means of which motion is imparted to the
machinery.
In order that our invention may be the better understood, we have appended the
accompanying sheet of drawings, in which Figure 1 is a side elevational view of an
improved drilling machine according to our invention showing a drawbar adapted
thereto. Figure 2 is a similar view of the opposite side of the machine having a
supplementary drilling plate attached thereto, and Figure 3 is a plan of the driving
gear to be hereinafter more particularly described.
Upon the outside of the stand or body A of a drilling machine, which may be of
ordinary construction, is cast or attached a leg or projection b, having a vertical hole
bored, drilled or otherwise formed therein, for the reception of the crank pin of a
horizontal arm b' to serve as a support for a supplementary drilling plate B, Figure 2,
which latter is not only capable of being rotated upon its own axis, but is also allowed
movement upon the axis formed by the crank pin aforesaid of the arm b', a set screw
and handle a being provided to secure said crank pin in any desired position. The
drilling plate may however be adapted to any convenient part of the front of the body
of the machine, other than upon the lug or projection & aforesaid. The use of the
supplementary drilling plate B above mentioned is for general work, but when the drill is
to be employed for drilling the tyres of wheels and the like, said supplementary plate
may be turned aside; or, if preferred, removed from the machine and a draw bar H
substituted therefor. Said draw bar H, which may be provided at one end with a

page_text: lug, slides freely in a channel or the like formed in the body or stand of the
machine, and is secured in position by a set screw and handle Figure 2, or by
equivalent means.
Upon the upper part of the back of the body A of the machine is secured in any
desired manner a forked bracket C, supporting in suitable bearings a driving shaft e,
upon one end of which is a fly wheel G, and upon the other end are mounted a fast
and loose pulley,,, motion being transmitted thereto from any convenient source.
Between the arms of the fork c, is keyed; or otherwise secured to the driving shaft e
aforesaid, a bevelled mitre wheel i gearing with a second mitre wheel secured upon
the end of a shaft or spindle which passes through the hollowed shank of the fork C.
A bevelled mitre wheel gears with and actuates the mitre wheel jattached to the
drill shaft, which latter is raised or lowered by means of the hand wheel actuating
the drill shaft by means of a screw thread formed thereon. By the arrangement of
the gearing above described we are enabled to reverse the position of the pulleys and
fly wheel upon the driving shaft e, thus allowing of the machine being fixed in any
convenient position.
Instead of the forked bracket being fixed to the body or frame A of the machine,
we may as a modification of the foregoing, employ a loose forked bracket, pivoted in
such a manner to the body of the machine as to allow of said bracket-and in
conjunction therewith, the driving shaft, pulleys and flywheel-being turned over so
as to assume a position the reverse of that which it originally occupied, any suitable.
device being employed to secure the bracket C in the desired position.
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 the improved drilling machine herein described, the mode and means employed
for reversing the relative positions of the fly wheel and pulleys substantially as herein
set forth and shown.
.
2° In a drilling machine, the combination with the drill, of a supplementary plate B
and draw bar H substantially as described and shown.
3° The improved drilling machine substantially as herein described and shown in
the accompanying drawings.
Data 1:11.
T
1000
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicants.