An Improved Tool for Cutting Tubes, Metal Bars, or the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Tool for Cutting Tubes, Metal Bars, or the like.
We, ROBERT WOLLNY, Cycle and Sewing Machine Merchant, of Leopoldstrasse 57,
and ERNST FORTANER, Mechanic, of Nymphenburgerstrasse 179, both in Munich,
in the Empire of Germany; do hereby declare the nature of this invention to be as
follows:-
This invention relates to a tool for cutting off tubes, metal bars and the like, in
which two securing claws for holding the tube are constructed in such a manner,
that one of them can reach completely into the other, so that the apparatus is
suitable for cutting tubes, or bars of small as well as of large diameter. The knife
or cutter can also be adjusted independently of the claw, so that the knife can be
adjusted to operate at the desired point on the tube or bar.
The tool is provided with a fixed claw which has on one side an opening. In a
tubular stem of the fixed claw there is seated a displaceable tube which tube carries
at its front end a claw movable therewith. On the stem of the fixed claw which is
provided exteriorly with a screw thread, there is seated a socket, which at its back
end is fixedly connected with the back end of the displaceable tube, so that when
screwing the socket on the stem of the fixed claw a displacement of the displaceable -
tube takes place in the latter and consequently the claws can be brought together
or apart.
1
The displaceable tube serves as a guide for a bar to which the knife is attached
in an easily detachable manner. Into the back end of this tube and parallel with
the same is screwed a screw threaded bolt connected with the bar carrying the
knife in such a manner, that the same can be turned independently from the latter.
On the socket before mentioned there is a second, socket, which at its back end is
fixedly connected with the bolt.
When turning the first socket and thereby displacing the two claws, the second
socket with the bolt remains stationary, and only the displaceable tube is screwed on
the bolt forwards or backwards. When, however, the second socket is turned, the
bolt is screwed forward or backward in the displaceable tube, and thus the knife is
placed forward or backward, without any operative movement of the first socket
and the movable claw taking place.
In this manner the knife can be adjusted independently of the claws and the
atter independently of the knife.
In consequence of the form of the opening provided in the fixed or stationary
claw of the tool which corresponds exactly with the cross section of the movable
claw, the two claws can be closed nearly completely as the one slides within the
other, and thus tubes or bars of very small diameter can be secured and held equally
s well as such of larger diameter.
Any uneven cutting caused by the accidental lateral displacement of the movable
law is avoided as it is guided between suitable lateral cheeks or plates, when the
ool is being used on tubes of large diameters, and in like manner between the
arallel faces of the opening in the fixed claw for tubes of small diameters.
:

page_text: The construction of the fixed claw is such as to allow of the introduction of a
second lever arm or handle, so that the tool can be swung by using both handles if
required.
For the adjustment of the knife on its carrying bar a number of slots are provided
in the bar one of which is engaged by a nose on the knife so that the knife can be
adjusted according to its wear and it can be used until nearly its whole length has
been worn.
The knife may also be fixed in a longitudinal slot of the bar by means of a pin or
the like arranged to pass, through any of a number of corresponding holes in the
bar and knife, or it may be fixed in the slot by means of the end of the knife
engaging grooves within the slot in a suitable manner.
L. 1 : 10. day of March 1808
HERBERT HADDAN & Co.,
Agents to Applicants, 18, Buckingham Street, Strand, W.C., London.
An Improved Tool for Cutting Tubes, Metal Bars, or the like.
We, ROBERT WOLLNY, Cycle and Sewing Machine Merchant, of _Leopold-
strasse 57, and ERNST FORTANER, Mechanic, of Nymphenburgerstrasse 179, both
in Munich, in the Empiro of Germany, 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 :-
This invention relates to a tool for cutting off tubes, metal bars and the like, in
which two securing or guiding claws are constructed in such a manner, that one
of them can reach completely into the other, so that the apparatus is suitable for
cutting tubes or bars of small, as well as of large, diameter. The knife or cutter can
also be adjusted independently of the claws so that the knife can be adjusted to
operate at the desired point on the tube or bar.
The improved' tool is shown in the annexed drawing.
Fig: 1 is a longitudinal section.
Fig. 3 is a cross section on line 3-3 of Fig. 1.
Fig. 2 is a longitudinal section, parts being omitted.
Figs. 5 and 6 show other forms of construction for securing the knife in its
carrier.
Fig. 4 is a front view in elevation of the operative portion of the tool.
The tool is provided with a fixed claw a which has on one side an opening or
passsage. In the tubular stem k of the fixed claw a there is seated a displaceable
tube which tube carries at its front end a claw c movable therewith. On the
stem k which is exteriorly provided with a screw thread there is seated a screw
socket d which at its back end is fixedly connected with the back end of the
displaceable tube b, so that when turning the socket & round on the stem k of the
fixed' claw a displacement of the tube b takes place in the latter and the claws a
and c can be brought together or apart.
The displaceable tube b serves as a guide for a bar e on which the knife fis
arranged in an easily detachable manner, Figs. 2 and 3. Into the back end of this
tube' b there is screwed a screw threaded bolt el; which is connected with the bar e
carrying the knife in such a manner, that the same can be turned independently from
the latter, Fig. 2. On the socket d there is a second socket g, which at its back
end is fixedly connected with the bolt e¹.'
When turning the first socket d and thereby displacing the two claws, the
second socket g-with the bolt el remains stationary and only the tube b is screwed

page_text: with the bolt el forwards or backwards. When however the socket g is turned,
the bolt e¹ is screwed forward or backward in the tube 'b and thus the knife f
is placed forward or backward, without any movement of the parts k.b d taking
place.
1
In this manner the knife can be adjusted-independently from the claws and the
latter independently from the knife. In consequence of the form of the opening j
provided in the fixed or stationary claw a of the tool which corresponds exactly
with the cross section of the movable claw c, the two claws ac can be closed
completely or nearly completely as the one slides within the other and thus tubes
or bars of very small diameter can be operated on equally as well as those of
larger diameter.
Further as the tube or bar to be worked is grasped on its two sides by the claws
and the latter are fixed automatically in any given position an accidental loosening
of the tool from the piece to be worked is completely avoided. Any uneven cutting
caused by lateral displacement of the movable claw c is avoided as it is guided
between suitable lateral cheeks or plates h when the tool is being used for tubes
of large diameters, and between the parallel faces of the opening ; in the fixed
claw when used for tubes of small diameters.
The construction of the fixed claw a is such as to allow of the introduction of a
second lever arm or handle i Fig. 1, so that the tool can be swung by simultaneously
using both handles.
In the form of construction shown in Figs. 1, 2 and 3 the knife engages by means
of a nose thereon into an indent or slot of the round bar e and is carried thereby
forward or backward by the latter during its movement.
For the adjustment of the knife in its carrying bar e a number of such slots are
provided in the bar one of which is engaged by the nose on the knife so that the
knife can be adjusted according to its wear and it can be used until nearly its whole
length has been worn.
In Figs. 5 and 6 two other methods of adjustment for the knife are shown. In
Fig. 5 the knife is slid into a slot of the round bar e, which is provided along its
whole length and close to one another with transverse bores, which allow the knife f
to be successively displaced according to the wear of its edge and fixed by means
of the bolt or pin eº.
In Fig. 6 the same purpose is obtained by providing cross grooves close to one
another on the one side of the slot and along its whole length, the form and size of
which grooves correspond with the bent end or nose fi of the knife f. When
the wear of the edge of the knife necessitates adjustment the knife is placed
further forward with its bent end or nose in the respective groove.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. An improved tool for cutting tubes, metal bars, or the like in which a fixed or
stationary claw a is provided with an opening ; which allows the passage of a
movable claw c so that the same can pass entirely or nearly entirely into the same
by which means tubes or bars of small, as also of large, diameter can be operated
on, the movable claw and consequently the knife f being guided and protected
against the lateral movement between side cheeks when the tool is used for
tubes of large diameter and between the faces of the opening ; when the
tool is used for tubes of small diameter substantially as described and
illustrated.
2. An improved tool as in Claim 1 in which the fixed claw a is provided with an
exteriorly screw threaded stem k upon which a screw socket d is seated having its
lower end fixedly connected to the lower end of a displaceable tube carrying the
claw c by which means the claws c a can be brought together or apart substantially
as described and illustrated.

page_text: 3. An improved tool as in Claims 1 and 2 in which a bar e carrying the knife is
guided within the tube b in the lower end of which a screw bolt e¹ loosely connected
with the bar e is turned by means of the socket substantially as and for the
purpose described.
D
11
000 .
"
1000
E
HERBERT HADDAN & Co.,
Agents to Applicants, 18, Buckingham Street, Strand, W.C., London.