Attachment to Drilling Machines.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Attachment to Drilling Machines.
CHRISTIAN KOERTE 36 Victoria Road in the City of Leeds Engineer ERNEST
WHITLEY Hollingside Horsforth near Leeds Engineer do hereby declare the
nature of this invention to be as follows:-
This invention has for its object an attachment to drilling machines, converting
the same into small radial drilling machines, so that any point within the range of
the drill attachment can be reached by the drill, without shifting the work.
It consists of a folding arm carrying on one end a drill spindle, which might be
provided with a chuck, on the other end, which is fitted to the end of a drilling
machine a driving pulley or any other driving gear, which rotates with the same.
This transmits the power to the spindle, which passes through the hinge of the
folding arm, which is fitted with a similar pulley, and which in its turn will
transmit the power to the drill in the same manner. If suitable these pulleys
might be of different diameters so as to run the drill, at a different speed to the
driving spindle of the large machine. The arrangements for feeding down the
drill are done by the usual arrangements for small drills or by the large machine
itself.
Dated this Seventh day of February 1895.
CHRISTIAN KOERTE.
ERNEST WHITLEY.
Attachment to Drilling Machines.
CHRISTIAN KOERTE of 36 Victoria Road in the City of Leeds Engineer
ERNEST WHITLEY of Hollingside, Horsforth near Leeds 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:
The object of this invention is to construct apparatus which may be readily
attached to ordinary large drilling machines so as to convert such machines into
folding radial drilling machines or small radial drilling machines, whereby the drill
employed can be driven at a high speed, and adjusted to any required position
over the machine table without having to move the work piece as heretofore.
This adjustment in the position of the drill is very important, especially when
small drills are employed, as they are liable to breakage if they are not set
exactly over the point on which they are required to operate; and it is obvious
that a far more accurate adjustment can be obtained by setting the light drill
attachment to the required position, than by adjusting a heavy drilling machine
table and the work piece.
In order that our invention may be clearly understood we will proceed to
describe same with reference to the accompanying drawings, in which similar
letters refer to like parts in all the figures.

page_text: Fig. 1 is a sectional side elevation, Fig. 2 a plan, and Fig. 3 a part front-
elevation of apparatus constructed according to our invention.
Figs. 4 and 5 are respectively, longitudinal and cross sections of a modification
of our said invention.
Referring to Figs. 1, 2 and 3, A is a connecting spindle, which is fitted or
attached to the spindle of an ordinary heavy drilling machine.
B is an arm which is supported in position by the spindle A, the opposite end of
the said arm B being pivotted or binged to an arm C. The arms B and C are
preferably made in two parts as shown in the drawing, such parts being held
together by bolts, or other equivalent means.
E is a spindle which passes through the end of the arm B, to which rotary
motion is transmitted from the spindle A by a train of wheels D. F is the drill
spindle situated within a bush G at the free end of the arm C, to which motion is
communicated from the spindle E by means of another train of wheels D', the
said spindle F being fed down or adjusted in height by means of a hand lever H,
or other known arrangement. A set screw M, is provided for the purpose of
clamping the arm C to the arm B, in order to prevent any relative movement of
the said arms taking place.
A ring L is mounted on the boss of the arm B in such a manner as to be
capable of being tightened or clamped thereto by a set screw N, and an anchor
rod K is provided in connection with the ring L whereby the arm B may be
locked in any desired position.
By releasing the set-screw N, the attachment may be moved round on the
spindle A without altering the position of the anchor rod K, and by swivelling the
rod K in a boss L on the ring L, the said rod K, can be moved either vertically
or horizontally and anchored to any part of the drilling machine to which the
attachment is connected.
Referring to Figs. 4 and 5, A is a spindle which is attached to that of the
drilling machine, such spindle A carrying an arın B at its lower end. A sliding
carriage is provided on the arm B, which carriage carries the drill spindle F
within the bush G, the said spindle F being fed down by means of the hand
lever H in the ordinary way. The required rotary motion is communicated to the
drill spindle F from the spindle A by means of bevel gearing P, shaft R and
bevel gearing S, the said shaft R, having a groove therein throughout its full
length for the reception of and movement of a feather key in the wheel S, thus
allowing of the necessary sliding movement of the carriage O.
The carriage O is clamped to the arm B in any desired position by means of a
set screw arrangement T, and the said arm B is retained in any required position
relative to the spindle A, by means of the ring L and anchor rod K as above
described.
The gearing for transferring from the spindle A to the drill spindle F, may
be such as to multiply the speed of the said drill spindle F to any required degree,
to suit the class of work to be performed; and instead of wheel gearing we may
if desired employ belt, chain, friction, or other gearing for transmitting the said
motion from spindle A to spindle F.
It will be readily understood from the above description, that the whole
apparatus can be swung round on its axis or spindle A, so that any required
point of the work-piece may be quickly reached by the drill, when the ring L is
clamped to the arm B, which through the medium of the anchor arrangement is
securely held in the required position.
By the employment of the above attachment common pillar drilling machines
and other large drilling machines, may be readily converted into small radial
drilling machines with the utmost facility, thereby rendering one machine
applicable for drilling the many and various sizes of holes, thus effecting a
considerable saving in cost of machinery; whilst the time occupied in setting the
drill is reduced to a minimum and this with far better results than have hitherto
been obtained. Although we have described the attachment to drilling machines

page_text: in two different forms, yet we would have it clearly understood that we do not
confine ourselves to the particular construction and arrangements described and
shown, as the same may be variously modified without departing from the nature
of our said invention.
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. An attachment for drilling machines, whereby motion is conveyed from the
main spindle to an auxiliary small spindle which latter is adjustable in position
with reference to the work substantially as and for the purposes set forth..
2. An attachment for drilling machines, having two adjustable arms which carry
an auxiliary drill spindle at their free end the said spindle being driven from the
main spindle by suitable gearing substantially as and for the purposes set forth.
3. An attachment for drilling machines having a single adjustable arm carrying
an auxiliary spindle which is adjusted longitudinally on same, the said spindle
being driven from the main spindle by suitable gearing substantially as aud for the
purposes set forth.
4. The combination of the connecting spindle A, arm B, arm C, spindle E,
gearing D, drill spindle F, bush G, gearing D', hand lever H, set screw M,
ring L, set screw N, boss L', and anchor rod K substantially as described and
shown in Figs. 1, 2 and 3 of the accompanying drawings.
5. The combination of the connecting spindle A, arm, B, sliding carriage O,
drill spindle F, bush G, hand lever H, gearing P, shaft R, gearing S, set screw T,
ring L, boss L, and anchor rod K substantially as described and shown in Figs. 4
and 5 of the accompanying drawings.
Dated this 29th day of March 1895.
CHRISTIAN KOERTE.
ERNEST WHITLEY.