IMPROVEMENTS IN PORTABLE DRILLING MACHINES
Year: 1886

page_text: JOHN WILLIAM HARTLEY, Engineer, California Works, Stoke-on-Trent, Staffre.
do hereby declare the nature of my invention for IMPROVEMENTS IN PORTABLE
DRILLING MACHINES, to be as follows:-
My invention has for its object improvements in portable Drilling Machines.
For the purpose of my invention I use a suitable frame, wherein I provide journals,
for the reception of required spindles, which I preferably arrange parallel to each
other, and which spindles I revolve in said journals.
Upon each end of one of said spindles, which may be cranked or otherwise, but
which for convenient reference I will call my cranked spindle, I fix a spur pinion.
These two spur pinions I cause to engage, or disengage, by means of a clutch gear
of any suitable kind, whereby said pinions, will revolve with said crank shaft or
remain stationary as desired. Said pinions gear respectively into two spur wheels
both of which revolve upon axis of screwed and hollow spindles, which I arrange
as follows. I combine an inner screw spindle, and an outer hollow spindle. In the
outer end of screw spindle I form a suitable chuck for holding a drill. In the
outer end of bollow spindle I form also a similiar chuck. I form a thread on
the inside of the hollow spindle wherein the said screw spindle is fitted. Said
screw spindle I screw in or out of said hollow spindle as desired. I key one of
said spur wheels fast upon said hollow spindle, and I bore out remaining spur
wheel to fit threaded portion of screw spindle, and fix in boss of said wheel a key,
which projects into a longitudinal groove, sunk into said screw spindle. When
spur wheel upon screw spindle is revolved, screw spindle revolves with it, and is at
the same time, free to enter or withdraw from said hollow spindle. Said pinions
upon crank shaft have an equal number of teeth in each, thus the spur wheel on
hollow spindle has one or more teeth in excess of or less than the number of teeth,
in spur wheel upon screw spindle. When crank shaft is revolved with pinions
engaged and geared in spur wheels, the screw spindle and hollow spindle revolve
with differential speeds, thereby giving a feed motion and the same time impart
the revolutions necessary to the drills. I disengage either of the spur pinions upon
the crank shaft and instantly either the screw spindle or the hollow spindle, as the

page_text: case may be, becomes stationary while the other revolves rapidly, and thus a rapid
feed is imparted either inwards, or outwards to the drills, this rapid feed can be
imparted either inwards or outwards by engaging or disengaging said pinions
alternately. I operate said crank shaft by one, or a pair of small oscillating
engines or other type of engine attached and combined with said frame, said
engine may be provided with reversing motion if desired. When I employ a single
engine I attach a hand lever having its fulcrum upon crank shaft. Outer end of
said lever is provided with a handle and a brake which presses at will against the
rim of fly wheel I use said lever for moving round crank shaft when engine is on
dead centre. I may also operate the crank shaft with rope pulley the crank being
in this instance not required.

page_text: JOHN WILLIAM HARTLEY, Engineer, California Works, Stoke on Trent Staffre.
do hereby declare the nature of my invention for IMPROVEMENTS IN PORTABLE
DRILLING MACHINES, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement:―
My invention has for its object improvements in portable Drilling Machines.
For the purpose of my invention I use a suitable frame, wherein I provide journals,
for the reception of required spindles, which I preferably arrange parallel to each
other, and which spindles I revolve in said journals.
Upon each end of one of said spindles, which may be cranked or otherwise, but
which for convenient reference I will call my cranked spindle, I fix a spur pinion.
These two spur pinions I cause to engage or disengage by means of a clutch gear of
any suitable kind, whereby said pinions will revolve with said cranked spindle, or
remain stationary as desired. Said pinions gear respectively into two spur wheels,
both of which revolve upon axis of screwed and hollow spindles, which I arrange
as follows. I combine an inner screw spindle and an outer hollow spindle. In
the outer end of screw spindle I form a suitable chuck for holding a drill. In the
outer end of hollow spindle I form also a similar chuck. I form a thread on the
inside of hollow spindle wherein the said screw spindle is fitted. Said screw
spindle I screw in or out of said hollow spindle as desired. I key one of said spur
wheels fast upon said hollow spindle, and I bore out remaining spur wheel to fit
threaded portion of screw spindle, and fix in boss of said wheel, a key which
projects into a longitudinal groove sunk into said screw spindle. When spur
wheel upon screw spindle is revolved, screw spindle revolves with it, and is at the
same time free to enter or withdraw from said hollow spindle. Said pinions upon
crank shaft have an equal number of teeth in each, but the spur wheel upon hollow
spindle has one or more teeth in excess of, or less than the number of teeth in spur
wheel upon screw spindle. When cranked spindle is revolved with both pinions
engaged and geared in spur wheels, the screw spindle and hollow spindle revolve
with differential speeds, thereby giving a feed motion and at the same time impart
the revolutions necessary to the drills. I disengage either of the spur pinions upon
the cranked spindle, and instantly either the screw spindle or the hollow spindle,
as the case may be becomes stationary, whilst the other revolves rapidly, and thus
a rapid feed is imparted either inwards or outwards, by engaging or disengaging
said pinions alternately. I operate said cranked spindle by one or a pair of small
oscillating engines, or other type of engine, attached and combined with same
frame, said engine may be provided with reversing motion if desired. When
I employ a single engine I attach a hand lever having its fulcrum upon cranked
spindle. Outer end of said lever is provided with a handle and a brake which
presses at will against the rim of fly wheel. I use said lever for moving round
cranked spindle when engine is on dead centre. I may also operate the cranked
spindle with a rope pulley the crank and engine in this instance not being
required.

page_text: Accompanying drawings illustrate my invention operated by an oscillating
cylinder engine of special type, and attached to same frame.
Fig. 1 is a front view, fig. 2 a sectional view, fig. 3 shews the brake lever for
moving engine over dead centres. The same letters refer to the same parts in each
figure.
A frame of cast iron or other suitable material A is provided with bearings B.
B¹ B to support screw spindle C and hollow spindle D: also bearings E. E' Eli Em
to support cranked spindle F. Close to each end of said cranked spindle F. I fix
spur pinions G. G¹ which gear respectively with spur wheels H. H¹ upon screwed
and hollow spindles C. and D. Said spur pinions G. G¹ are caused to rotate with
cranked spindle F by means of clutches as shown at I. I actuated by levers or
handles J. J. At the outer ends of screw and hollow spindles, drill chucks N. N'
are attached, into which the drills K. K¹ are fitted and held firm by the usual
methods.
It will be seen that if cranked spindle F is caused to revolve either by engine L
or by other suitable means, that the clutches I. 1' which work upon keys fixed in
said cranked spindle F. will also revolve with it. If both clutches I. I¹ are caused
to engage with their respective pinions G. G¹ they will impart motion to spur
wheels H. H¹ keyed upon screw and hollow spindles, causing drills K. K₁ to
revolve, and as one of the spur wheels contains one or more teeth in excess of, or
less than the other, thus moves screw spindle C either in or out of hollow spindle D
according to the direction they revolve, thereby imparting to the drills a lateral or
feed motion. Sometimes however when withdrawing the drills or when a quick
feed is required, only one of the pinions is put in gear and the drill connected
there with revolves whilst the other remains stationary, and thus a rapid feed is set
up either inwards or outwards as the case may be.
The fly wheels M. M₁ are keyed upon cranked spindle F to steady the motion
and also for the convenience of starting, by means of lever already described and
illustrated by fig. 3.
At the top of frame A. I attach a tangent screw O engaging with worm wheel P,
said worm wheel being screwed upon suspending screw Q. By turning handle R
attached to tangent screw O I am enabled to either raise or lower the machine at
will, forming a handy means of adjustment.
Having now particularly described and acertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. A portable drilling machine combined with a motor, engine, or engines, either
oscillating or otherwise, with a pair of drills actuated so as to drill opposite each
other, constructed and operated as herein described, and illustrated by accompanying
drawings.
2. The mode of feeding two drills drilling opposite to each other, and with-
drawing same by means of differential gear as herein described.
BILLINGTON & NEWTON.