Improvements in and connected with Centre-bits and similar Boring-tools.
Year: 1896

page_text: Date of Application, 28th Jan., 1896
Complete Specification Left, 27th Oct., 1896-Accepted, 5th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in and connected with Centre-bits and similar
Boring-tools.
I, ALBRECHT VON KUNOWSKI, of Kreuzburg, in the Province of Upper-
Silesia, in the German Empire, Physician do hereby declare the nature of this
invention to be as follows:-
This invention refers in general to centre-bits and similar boring-tools, and in
particular to those sorts of said tools, as are used for boring rather long holes, for
instance through beams. The purpose of my invention is to provide means for
quickly and easily removing the chip out of the hole bored, without necessitating
the centre-bit or similar boring-tool to be itself removed from said hole.
I attain that purpose by attaching the boring-bit proper to a piece of tube, and
by arranging within the latter a threaded spindle adapted to be turned with a
somewhat greater speed than said piece of tube.
In order to make my invention more clear, I refer to the accompanying drawing,
in which I have shown one form of construction of my improved bore as an
example. The tube b (Figs. 1, 2, 4, 5 & 6) is the piece of tube afore mentioned;
said tube is at its lower end closed by the plate & (Figs. 2 & 6). Said plate and
tube are furnished with the cutting-teeth vv (Figures 1 & 2) and the cutting-
knife h, and possesses above the latter an aperture m (Fig. 2) shaped so as to be
adapted to lead the chips into the interior of the said tube b. The chips get
instantly between the threads of the spindle s arranged centrally within the tube b,
and are thus conveyed upwards until they arrive at, and leave said tube through,
the aperture 1. In the form of construction shown, the spindle s rotates in the
direction of the tube b, but I wish it to be understood, that I do not confine myself
just to this one form of construction; the device may easily be so constructed, that
the direction of rotation of the spindle is reverse to that of the tube.
To operate said spindle and said tube in the manner afore stated, I prefer to
combine them with a special mechanism, such as shown in the drawing. The tube
is at its upper end provided with a cog-wheel y (Figs. 1-3) and with a ratchet-
wheel a (Figs. 2, 4 & 5) arranged below said cog-wheel. The tube b carries,
further, a loose casing c (Figs. 1-3) held between said wheels y and a, and a
curved hand-lever e (Figs. 1, 2, 4 & 5) having its boss between the said wheel a
and a collar ffixed to said tube. The lever e is provided with a pawl g taking
into the ratchet-wheel a, and the casing c is provided with a pawl d taking into the
cog-wheel y. Said casing contains besides said pawl d a double cog-wheel, the
lower and smaller part of which gears with the cog-wheel y afore mentioned,
whereas the upper and larger part of said double-wheel is in gear with a
cog-wheel fixed to the spindle s.
Supposed, the casing c be held fast with one hand, and the lever e be turned
with the other hand in the direction indicated by the arrow i (Fig. 5), the tube b
will be rotated together with the cog-wheel y by means of the action of the pawl g
upon the ratchet-wheel a; simultaneously therewith the spindle s will be rotated
from the crg-wheel y by the mediation of the cog-wheels and .
z
Although I prefer to operate my improved boring-tool with the mechanism just

page_text: described, I do not confine myself to said mechanism. The parts e, g, and a may
well be dispensed with, and a crank may instead thereof be attached to the
double-wheel; in fact, any other -uitable mechanism may he used.
I am well aware, that bores with a threaded spindle have been used prior to my
invention, but in those older bores the boring bit proper is secured directly to said
threaded spindle, and the latter is not combined with a tube taking down into the
hole bored. By employing, however, a tube in the manner described, I prevent
the chips from causing friction with the wall of the bored hole, and the work
requires, therefore, less expense of power, proceeds more easily, and need even then
not be interrupted for the removal of the chips, if the hole is a very long or
deep one.
Dated this 28th day of January 1896.
J. P. BAYLY,
18 Fulham Place, London, W., Agent for the Applicaut.
TION.
Improvements in and connected with Centre-bits and similar
Boring-tools.
I, ALBRECHT VON KUNOWSKI, of Kreuzburg, in the Province of Upper-
Silesia, in the German Empire, Physician, do hereby declare the nature of this
invention, and in what manner the same is to he performed, to be particularly
described and ascertained in and by the following statement :-
This invention refers in general to centre-bits and similar boring tools, and in
particular to those sorts of said tools as are used for boring rather long holes, for
instance through beams. The purpose of my invention is to provide means for
quickly and easily removing the chip out of the hole bored, without necessitating
the centre bit or similar boring tool to be itself removed from said hole.
I attain that purpose by attaching the boring bit proper to a piece of tube, and
by arranging within the latter a threaded spindle adapted to be turned with a
somewhat greater speed than said piece of tube.
In order to make my invention more clear, I refer to the drawing filed with the
Provisional Specification, in which similar letters denote similar parts throughout
the several views, and in which:
Fig. 1, is a side view of my improved boring tool;
Fig. 2, is a vertical section through the same;
Fig. 3, is an upper view, the curved lever e Figs. 1, and 2, being left away, and
a portion of the cover of the casing e being broken off;
Fig. 4, shows the upper part of the tube b with the wheels attached thereto;
Fig. 5, is an upper view of Fig. 4, the cog wheel y of said latter figure being,
however, left away; and
Fig. 6, shows the lower end of said tube b with the boring screw o and the
cutting knife h.
The tube b Figs. 1, 2, 4, 5 and 6, is the piece of tube afore mentioned; said tube
is at its lower end closed by the plate k Figs. 2 and 6. Said plate and tube are
furuished with the cutting teeth v v Figs. 1 and 2, and the cutting knife h, and
possesses above the latter an aperture m Fig. 2, shaped so as to be adapted to lead
the chips into the interior of the said tube b. The chips get instantly between the
threads of the spindle s arranged centrally within the tube b, and are thus conveyed
upwards until they arrive at, and leave said tube through, the aperture 1.
form of construction shown, the spindle s rotates in the direction of the tube b but
I wish it to be understood, that I do not confiue myself just to this one form of

page_text: construction; the device may easily be so constructed, that the direction of rotation
of the spindle is opposite to that of the tube.
To operate said spindle and said tube in the manner afore stated, I prefer to
combine them with a special mechanism, such as shown in the drawing. The tube is
at its upper end provided with a cog wheel y Figs. 2, and 3, and with a ratchet wheel a
Figs. 2, 4 and 5, arranged below said cug wheel. The tube b carries, further, a
loose casing Figs. 1 and 3, held between said wheels y and a, and a curved hand
lever e Figs. 1, 2, 4 and 5, having its boss between the said wheel a and a collar f
fixed to said tube. The lever e is provided with a pawl y taking into the ratchet
wheel a, and the casing c is provided with a pawl d taking into the cog wheel y.
Said casing contains besides said pawl d a double cog wheel, the lower and
smaller part of which gears with the cog wheel y afore mentioned, whereas the
upper and larger part of said double wheel is in gear with a cog wheel a fixed to
the spindles.
Suppose the easing e be held fast with one hand, and the lever e he turned with
the other hand in the direction indicated by the arrow i Fig. 5, the tube b will be
rotated together with the ceg-wheel y by means of the action of the pawl g upon
the ratchet wheel a; simultaneously therewith the spindle a will be rotated from
the eng-wheel y by the mediation of the eng wheels and z.
I am well aware, that bores with a threaded spindle have been used prior to my
invention, but in those older bores the boring bit proper is secured directly to said
threaded spindle, and the latter is not combined with a tube taking down into the
hole bored. By employing, however, a tube in the manner described, I prevent
the chips from causing friction with the wall of the bored hole, and the work
requires, therefore, less expense of power, proceeds more easily, and need even
then not be interrupted for the removal of the chips, if the hole is a very long or
deep one.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a boring tool, the combination with the boring bit proper, of a tube having
said bering bit fixed to it, and adapted to receive the chips produced by the said
bit; means for rotating said tube, and for removing the chips automatically
therefrom, for the purpose as described.
2. In a boring tool, the combination with the boring bit proper, of a tube having
said boring bit fixed to it, and adapted to receive the chips produced by the said
bit; a threaded spindle arranged within said tube; and means for rotating said
threaded spindle as well as the said tube, for the purpose as described.
3. In a boring tool, the combination with the boring bit proper, of a tube having
said boring bit fixed to it, and adapted to receive the chips produced by the said
bit; a threaded spindle arranged within said tube; and means for rotating said
threaded spindle together with, but quicker than, the said tube, for the purpose as
described.
4. In a boring tool the combination with the boring bit proper, of a tube having
said boring bit fixed to it, and adapted to receive the chips produced by the said
bit; a threaded spindle arranged within said tube; a ratchet wheel and a spur
wheel fixed to the said tube; a lever with pawl adapted to operate said ratchet
wheel, a purwheel fixed to said threaded spindle; and means for transmitting the
rotation of the spur wheel of the tube to the spurwheel of the said threaded spindle,
for the purpuse as described.
5. In a boring tool, the combination with the boring bit proper, of a tube having
said boring bit fixed to it, and adapted to receive the chips produced by the said
bit; a threaded spindle arranged within said tube; a ratchet wheel and a spur
wheel fixed to the said tube; a lever with pawl adapted to operate said ratchet
wheel, a spur wheel fixed to said threaded spindle, a double spur wheel gearing
with said two former spur wheels, a pawl taking into one of the said spur wheels;

page_text: and a casing arranged loosely upon said tube, and containing all the spur wheels;
said casing forming the bearings for said double spur-wheel and for said latter
pawl, substantially as described.
Dated this 27th day of October 1896.
J. P. BAYLY,
18 Fulham Place, London, W., Agent for the Applicant.