An Improvement in Flexible Metallic Tubing.
Year: 1894

page_text: Date of Application, 29th June, 1894
Complete Specification Left, 26th Mar., 1895-Accepted, 4th May, 1895
PROVISIONAL SPECIFICATION.
An Improvement in Flexible Metallic Tubing.
I, WILLIAM HENRY KANZON BOWLEY, of 114 Holborn in the City of
London, Engineer, do hereby declare the nature of this invention to be as
follows :-
This invention relates to flexible metallic tubing manufactured as described in
Specifications No. 9478 of 1885 No. 3477 of 1888 No. 16341 of 1889 No. 15192
of 1890. No. 11033 of 1892 No. 23375 of 1892 and No. 1476 of 1894, by helically
coiling a strip of metal corrugated in various forms but in such a manner that the
successive convolutions interlock with each other forming a continuous tube.
When a tube thus formed is subjected to a twisting strain such as would tend
to uncoil the convolutions it is rendered unsound. My invention relates to a
construction of tube by which such uncoiling is prevented.
For this purpose, instead of coiling the helical strip on a cylindrical mandril, as
it has been done hitherto, I coil it on a mandril of such a section that the convolu-
tions cannot revolve on one another, it may be of oval section, or of polygonal
section having a number of sides which may vary from five up to ten or twelve
according to the diameter of tube that is to be manufactured.
I thus produce a
tube that cannot be uncoiled.
It may be employed to enclose a tube of circular section for conducting fluids,
the inner tube being made with packing or otherwise so as to be tight against
leakage. Or a single tube of oval or polygonal section may be used as armour
for electrical conductors, two insulated wires being enclosed side by side in an oval
tube, or a greater number in a tube of polygonal section.
Dated this 29th day of June 1894.
ABEL & IMRAY,
Agents for the Applicant.
An Improvement in Flexible Metallic Tubing.
I, WILLIAM HENRY KANZON BOWLEY of 114 Holborn, in the City of
London, 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 :-
This invention relates to flexible metallic tubing manufactured as described in
Specifications No. 9478 of 1885 No. 3477 of 1888 No. 16341 of 1889 No. 15192
of 1890 No. 11033 of 1892 No. 23375 of 1892, and No. 1476 of 1894, by helically
coiling a strip of metal corrugated in various forms but in such a manner that the
successive convolutions interlock with each other forming a continuous tube.
When a tube thus formed is subjected to a twisting strain, such as would tend
to uncoil the convolutions, it is rendered unsound. My invention relates to a
construction of tube by which such uncoiling is prevented.

page_text: For this purpose, instead of coiling the helical strip on a cylindrical mandril, as
it has been done hitherto, I coil it on a mandril of such a section that the convolu-
tions cannot revolve on one another; it may be of oval, or of polygonal section
having a number of sides which may vary from five up to ten or twelve according
to the diameter of tube that is to be manufactured. I thus produce a tube which
cannot be uncoiled. It may be employed to enclose a tube of circular section for
conducting fluids, the inner tube being made with packing or otherwise so as to be
tight against leakage. Or a single tube, of oval or polygonal section, may be
used as armour for electrical conductors, two insulated wires being enclosed side
by side in an oval tube, or a greater number in a tube of polygonal section.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is :-
A flexible metallic tube, having an oval, polygonal or other section such that
one convolution cannot revolve upon another so as to untwist the tube.
Dated this 26th day of March 1895.
ABEL & IMRAY,
Agents for the Applicant.