Year: 1888

page_text: We, FRANK JACKSON, and EDWARD ROBERT AUSTIN, of Strangeways Ironworks,
Manchester, in the County of Lancaster, Engineers, do hereby declare the nature of
the said invention to be as follows:-
This invention has for its object the construction of a really portable Drilling
Machine, worked by compressed air and capable of drilling holes at any angle in any
plane in shells of Boilers and other objects too large to be conveniently handled under
a fixed drill, or requiring the holes to be put through two or more thicknesses of
material in situ.
The portable drilling machine consists of a U shaped frame, formed of steel or
other metal of sufficient depth of "gap" to allow the drill to reach the holes to be
drilled.
The end of one leg of the frame is formed to carry a drill spindle which is driven
by worm or other gearing, the feed motion being given by a screw on the top of the
spindle.
The motive power is supplied by compressed air from any convenient source
conveyed by a flexible or other suitable tube or pipe to a three cylinder or other form
of Engine, which is secured to the rear of the said U frame, and gives rotary motion
to a shaft having bearings on the frame, which is geared with the drill spindle as
above stated.
To keep the machine steady at its work, and give the necessary resistance for with-
drawing the drill, when the hole is completed, the frame at the drill end, is provided
with a lever having an adjustable fulcrum, and intended to press upon the object being
drilled, and where there are two or more thicknesses to squeeze and hold them firmly
together, the pressure being given by a screw at the rear of the lever.
lever itself is forked at its operating end, to pass on each side of the drill.
DQ17
The

page_text: The machine is intended to be suspended, by any suitable crane, at its centre of
gravity by a bridle or a quadrant suspender connected with the frame so as to hold and
sustain it at any angle and in any plane desired.
PETER J. LIVSEY,
Agent.
COMPLETE SPECIFICATION.
Improvements in Portable Drilling Machines.
We FRANK JACKSON and EDWARD ROBERT AUSTIN of Strangeways Ironworks
Manchester, in the County of Lancaster, Engineers, 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 has for its object the construction of a really portable Drilling
Machine worked by compressed air and capable of drilling holes at any angle in any
plane in shells of Boilers and other objects too large to be conveniently handled under
a fixed drill or requiring the holes to be put through two or more thicknesses of
material in situ.
The portable drilling machine consists of a U-shaped frame, formed of steel or
other metal of sufficient depth of gap to allow the drill to reach the holes to
be drilled.
The end of one leg of the frame is formed to carry a drill spindle which is
driven by worm or other gearing, the feed motion being given by a screw on the top
of the spindle.
The motive power is supplied by compressed air from any convenient source conveyed
by a flexible or other suitable tube or pipe to a three cylinder or other form of Engine,
which is secured to the rear of the said U frame, and gives rotary motion to a shaft
having bearings on the frame, which is geared with the drill spindle as above stated.
To keep the machine steady at its work, and give the necessary resistance for with-
drawing the drill, when the hole is completed, the frame at the drill end is provided
with a lever having an adjustable fulcrum, and intended to press upon the object
being drilled, and where there are two or more thicknesses to squeeze and hold them
firmly together the pressure being given by a screw at the rear of the lever.
The lever itself is forked at its operating end to pass on each side of the drill.
The machine is intended to be suspended by any suitable crane, at its centre of
gravity by a bridle or a quadrant suspender connected with the frame so as to hold
and sustain it at any angle and in any plane desired.
Fig. 1 is a side elevation in which the suspended bridle is shown broken.

page_text: Fig. 2 is an elevation looking at the drill end of the machine, and
Fig. 3 is a top edge or plan view.
A is the U shaped frame with a gap to take in the thickness and to reach to the
holes required to be drilled.
a and a is a shaft passing lengthway of the framing, having bearings thereon at A¹
and A. At the rear end there is a flange formed on the frame A to which the casing
and parts forming a three cylinder Engine bis secured.
This Engine is of what is known as the "Brotherhood" type the construction of
which is well understood the piston of each cylinder acting upon the same crank.
It is supplied with compressed air by preference, by means of a flexible tube c
coupled up with a cock or valve c¹ for turning on or off or regulating the supply of
motive fluid to the Engine which fluid exhausts therefrom through the ontlet 6.
The Engine drives a crank on one end of the shaft a to which shaft a coupling a³ is
secured to connect it with the shaft a', the end of which can slide to and fro to a
slight extent, on a fixed key in the coupling to allow for wear in the collar or flange d'
on the worm d secured on the end of the shaft a.
a is an adjustable collar on the shaft a to prevent end movement in it.
There is a hand or fly wheel e, (not shown in fig. 2) for turning the drill spindle by
hand and to give momentum.
The word gears with a worm wheel which is connected with the drill spindle g
by a fixed key so that the spindle can be rotated while being moved endways through
the boss of the worm wheel which is prevented from moving in the direction of the
lengthway of the drill spindle by fitting in a gap formed for it in the end of the
frame A.
The drill spindleg is arranged to rotate in bearings on the frame as shown.
The upper end of the drill spindle is connected with a screw so as to move up and
down with the screw but not rotate with it, this screw screws through a thread formed
in the boss of an arm from the frame A.
h¹ is the handle for rotating the screw to feed or withdraw the drill .c.
The lower end of the drill spindle is formed to receive the ends of drills of
various sizes.
is the holding lever its fulcrum is on the end of a screwed rod 2, which passes
through a screw nut k³ in a recess formed in the frame A which permits of the nut
being rotated for adjustment but prevents end movement with the rod -The upper end
of the screwed rod can pass freely up and down a recess formed for it in
the frame.
One end of the lever k is forked or has two prongs k so that one prong can come
on one side and the other prong on the other side of the drill ..
The other end of the lever is forked, and jointed with pivots or trunnions on a
collar placed on the lower end of a screw so as to move with the lengthway
movements of the screw but so that the latter may rotate in the collar ³. The
screw screws through a thread formed in the frame, as shown, and is rotated by
the hand wheel k'.
The machine is suspended from a bracket 7 secured to the frame A by a bridle
which is jointed to the bracket at and the bridle is suspended by a bow jointed
at Pas shown.
The point or pivot is the centre of gravity of the machine in the plane of fig. 1
and the point or joint is the centre of gravity in the plane of fig. 2.
The two sides of the bridle are made long enough to allow the machine to
make a complete revolution on the pivots 12 without touching the bridle.
When required the machine is or may be suspended by either of the side loops l*.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is.
1. In portable drilling machines the combination of a lever or its equivalent and
mechanism or arrangements for operating the same with the frame of the machine to

page_text: hold the part or parts to be drilled, and steady the machine while operating and
withdrawing the drill, substantially as hereinbefore described and illustrated by
the drawings.
2. The construction and arrangement of a portable drilling machine capable of
being suspended upon an axis passing through its centre of gravity, so that the
machine may be free to turn and work at any angle substantially as hereinbefore
described and illustrated by the drawings.
3. The combination and arrangement of the parts forming a portable drilling
machine substantially as hereinbefore described and illustrated by the drawings.
Dated this Fourteenth day of November 1888.
PETER J. LIVSEY,
Agent.