Improved Drilling Machine.
Year: 1892

page_text: Date of Application, 29th Apr., 1892
Complete Specification Left, 12th Jan., 1893-Accepted, 4th Mar., 1893
PROVISIONAL
SPECIFICATION.
Improved Drilling Machine.
EDMUND TYRRELL 43 Santley Street Ferndale Road Brixton S.W. Foreman
Engineer, do hereby declare the nature of this invention to be as follows:-
That the drill is moved in any direction at the will of the operator, over the
work, which is fixed to the bed of machine, and is instantly fixed and firmly held
while drilling and again as quickly released so as to copy the exact form required
to be drilled. The drilling form is always in sight and is fixed above the work,
which is perfectly copied on the article to be drilled.
Also that the machine is driven by an endless gut or band and requires no loose
tension weight, but is always adjusted in whatever position the drill is moved to.
The speed can be altered at once to suit different metals, it will drill any kind of
work, and is especially suited for drilling piano-forte iron frames, and my
invention provides an arrangement of drilling machine by means of which the
user can command a very large area of surface of the piece to be drilled without
any necessary change of the position on the machine and so that an instantaneous
change of the position of the drill from one part of the surface to be drilled to
another can be made with ease & accuracy.
The main parts of the machine are carried between a pair of side frames which
at a suitable level are connected by a fixed transverse bed, on which slides a saddle
for carrying a piece which carries the drilling headstock capable of sliding trans-
versely to the first named transverse bed piece. Thus the said saddle & the drill
stock slide are free to slide in directions normal to each other, these sliding
movements being effected by hand by means of in one case a lever & rack & in the
other by a handle. Over the main transverse bed piece is carried a shaft upon
which slides the pulley driven by it, and a strap or cord on which, drives the drill
spindle, the pulley being attended by an adjustable jockey pulley. Other pullies
are carried by the drill head & the sliding piece.
The aforesaid shaft is driven at the desired speed by a convenient source of
power. When the machine is used for drilling large numbers of holes in similar
positions and in similar things as for instance in metal pianoforte frames, a form or
template is or may be fixed above, but not necessarily over the thing to be drilled.
This by suitable & adjustable guide pieces and "finding" point attached to the
drill head slide enables the user to place the drill head rapidly in the proper
position so that the relation betweeen the holes in the form is imitated on the piece
to be drilled.
The table on which the work is fixed by clamps or other suitable and quick
acting means, is guided by the side frames & carried on four vertical screws which
are connected by spindles & bevil gearing so that the four screws may be operated
from one position & by turning one spindle.
Dhin 7th 1
11000

page_text: COMPLETE SPECIFICATION.
Improved Drilling Machine.
I EDMUND TYRRELL, of 43 Santley Street, Ferndale Road, Brixton, in the
County of Surrey, Foreman 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 :-
My invention relates to an improved construction of drilling machine, in which
the drill is capable of being moved about in any direction over the work which is
fixed to the bed of the machine, and of being readily and securely fixed when
placed in the desired position, the object being to readily reproduce pieces of work
having a large number of drilled holes therein, so that they shall all be identically
alike and interchangeable.
I attain this end in the manner illustrated by the accompanying drawings, in
which Figure 1 Sheet No. 1 is a view in front elevation of our improved machine.
Figure 2 Sheet No. is a view in side elevation thereof, and Figure 3 Sheet No. 3
is a view in plan thereof.
Throughout these views similar parts are marked with like letters of reference.
On to a suitably shaped frame A is mounted a bed B on which slides a saddle C
forming a bed for a sliding piece D carrying the drilling headstock D' and its
operating mechanism. The bed E for carrying the work is mounted on four vertical
screw spindles F, F, etc., carried in suitable bearings in the frame and all adapted
to be operated to raise and lower the said bed by means of bevel gearing operated
through spindles G, G, etc., one of which is actuated by a suitable handle G¹. On
the ends of the main transverse bed B are fixed brackets H, H, carrying
bearings h, h, for a shaft J on one end of which is fixed a set of driving pulleys J
adapting the said shaft to be driving at any desired speed from any convenient
source of power. On the saddle C are also mounted two brackets H', H', carrying
bearings h', h, for the shaft J, the said bearings being capable of sliding laterally on
the said shaft. Between these bearings is mounted on the shaft J a grooved
pulley K capable, by means of a feather and keyway, or their equivalents, of
sliding laterally on the said shaft but of being driven thereby. Motion is imparted
from this pulley K to the pulley L on the drill spindle L' carried by the
headstock D¹, by means of a cord or band M passing round suitable guide
pulleys k, k, k, one of which is mounted in a bracket ¹ so as to be adjustable with
respect to the sliding piece D as shown by Figure 2 Sheet No. 2 of the
accompanying drawings to enable the tension of the driving cord or band to be
adjusted as required. The drill spindle L' is brought down to its work by means
of the lever N in the well-known manner, but any other suitable mechanism may be
employed. The movement of the slide D carrying the drilling headstock is effected
by the hand direct by means of the handle d fixed to, or carried by, the said slide,
and the saddle C is moved on the bed B by hand indirectly through the lever O
and rack b in the bed B. In a suitable socket P on the slide D is a spring finger
or "finder" Pi controlled by a lever in close proximity to the handle d so that it
may be operated by the same hand that works the slide D. On to the bed B are
fixed brackets r, r, etc. adapted to receive and support a template R. The piece
of work having been clamped or otherwise fixed to the bed E, the drill headstock
is moved by the hands of the operator until the spring finger or
" finder
engages with the desired hole in the template, when the drill is brought down
to do its work. The headstock is again moved till the finger or
"finder
engages with the next hole in the template, when the corresponding hole in the
work is drilled, and so on until the work is completed.
وو
It will be seen that with this construction of machine the drill can be readily
and easily moved over the work, and that it affords a large range of movement.

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
A drilling machine in which the drill headstock is so mounted that it has an
universal movement over the bed adapted to carry the work, and which is capable
of being locked to the main frame by means of a spring finger or "finder" adapted
to engage with a template for reproduction or interchangeable work as hereinbefore
described and shown.
Dated this 19th dow of Ianua1000
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.