Improvements in Boring and Drilling Machines.
Year: 1898

page_text: Date of Application, 15th Nov., 1898-Accepted, 29th July, 1899
COMPLETE SPECIFICATION.
Improvements in Boring and Drilling Machines.
I, JOSEPH POIL, Junior, Engineer, of 58, Mathildenstrasse, Deutz, near Koeln,
in the German Empire, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
My invention relates to boring and drilling machines, particularly those
designed for operating on large work.
In the general construction of machines at present in use for large work, the tool
and tool spindle, together with the feed gearing, are carried by a slide or plate
supported by, and adapted to be travelled upon, an arm radiating from the fixed
pillar of the framing and overhanging the work table. By this plan, however, the
feed gearing is at times somewhat difficult of access, while inaccuracy in the holes
made is apt to result owing to the arrangement of the said arm.
The object of my invention is to obviate the disadvantages just mentioned, and
to attain same, I so construct and arrange the machine that the tool is fed to,
and withdrawn from, the work by an adjustable bar which is connected to the tool
spindle so as to permit revolution and traverse and is independent of an adjustable
support or saddle varying the transverse position of the tool and spindle.
I will now proceed to fully describe my invention with the aid of the accom-
panying drawings which illustrate a machine embodying it. In these drawings,
Fig. 1 is an end elevation whilst Figs. 2 and 3 are respectively a part longitudinal
elevation and a part longitudinal section on the line in Fig. 1.
A is the frame of the machine that carries the tool and its accessories. Situated
between the side members of this frame A is the work table E which is arranged
to be moved longitudinally in any convenient manner; it is illustrated in the
form of a carriage adapted to run on the rails r, r by means of the rack f, wheel g
and handwheel g¹.
Also between the side members of the frame A, and carried by them in suitable
hearings thereon, are the guide rods or bars b, b¹ one of which in the drawings
is screwed and fitted with a handwheel d for turning it.
c is the tool support in the form of a bracket constituted, as clearly shown in
Figs. 1 and 3, by a vertical sleeve enclosing the tool spindle and by two hori-
zontal sleeves for receiving the rods b, b1 so that the support can be moved upon
them to travel the tool transversely when the handwheel d is actuated.
Both rods b, b¹ may of course be screwed and jointly operated, or, instead of
them, I may adopt a plain guide and arrange the support e to be adjusted thereon
by clamps or otherwise.
The tool spindle his disposed in the support e in such a manner that it-and
therefore the tool-may be revolved and at the same time receive (independently
of the transverse movement or traverse) vertical motion from the adjustable sup-
porting harn that is located as shown and appropriately connected to the spindle h
and operated. For these purposes, as exemplified the spindle h is secured to the
slide or shoe m in any of the usual ways that will not interfere with its revolution
and the slide is fitted over the flange m¹ of the barn so that it is carried thereby,

page_text: '
while it can slide along it simultaneously with the adjustment of the support c;
for operating the bar », levers o, o are fulcrummed at o¹, o' on the frame A and
joined by links q, q to the bar n and by other links g', ql to the lever p pivoted
at pl on the frame A and arranged for oscillation by the chains and as shown
in Fig. 1, or otherwise. Both these chains are attached to the long arm of the
lover 7, the chain 7ª depending directly therefrom, while the chain 2 is passed
over the sheave p from which it hangs. When the chain is pulled, the short
arm of the lever p is elevated and depresses, through the links g², g¹, the short
arm of each lever o which motion is transmitted by the links g. 7 to lower the bar n
and hence feed the tool to the work. On pulling the chain 2, as will be obvious,
the reverse operation ensues.
The tool spindle h is driven by the bevel wheels h³, h, the connection between
the spindle and the former wheel being established in any known way to per-
mit the vertical movement as aforesaid without affecting its freedom to revolve.
The shaft whereon is keyed the wheel 8, is borne by the support and upon it
also is fixed the driving pulley i receiving motion, through the belt, from
another pulley to which power is transmitted from the countershaft 7. The
pulley is mounted upon the counter-weighted beam centred upon the shaft /
so that the requisite tension upon the belt may be maintained as the support e
is traversed.
The frame A and table E may be constructed and arranged to he adjustable
vertically, as will be well understood, to adapt them to work of considerable and
varving heights.
From the foregoing, it will be seen that in my improved machine the tool and
tool spindle are carried and conveyed to and from the work by a bar which is
efficiently sustained and capable of being easily operated to effect the necessary
vertical movement of the tool spindle and tool, while the support for accomplish-
ing the transverse movement of the tool and spindle is independently arranged
on guides adequately supported, consequently accuracy in work and convenience
for affecting the various adjustments accrue.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to he performed I declare that what
I claim is:-
1
1. In horing and drilling machines, the combination of an adjustable bar for
conveying vertical movement to the tool spindle whereto it is connected to permit
revolution and traverse with an adjustable support or saddle surrounding the tool
spindle and effecting the transverse movement thereof, substantially as set forth.
2. In boring and drilling machines, the combination of a frame such as A, a
transversely adjustable support or saddle c, a tool spindle 7, a slide or shoc m
sliding upon, and carried by, an adjustable bar n, and counterbalanced driving
gearing connecting with the tool gear, all arranged and adapted for use, sub-
stantially as described.
3. The combination of the various parts constituting my improved horing and
drilling machine, all constructed, arranged and adapted for operation, substantially
as herein described in reference to, and as shown in, the accompanying drawings.
Dated this 14th day of November 1898.