Year: 1888

page_text: I, FREDERICK WALTON of No. 2 Eaton Place Brighton in the County of
Sussex, Manufacturer do hereby declare the nature of this invention to be as
follows :-
Flexible metallic tubing is made by helically twisting a strip of metal with the edges
of the strip bent in such a manner that each convolution engages with the next, the
two contiguous edges forming together a more or less loose hook joint. Usually, in
order to prevent leakage through these joints and yet to allow sufficient movement in
them to give the flexibility, a strip of caoutchoue or analogous elastic packing material
is twisted along with the metal strip so as to occupy the clear space within the hook
joint of the contiguous cor volutions. This packing is liable to be acted on by the
metal and by the liquids or gases to which it may be exposed, and thereby to become
deteriorated itself, or to have a detrimental action on substances coming in contact
with it. My invention relates to means of rendering the joints of such tubing
impervious without the use of packing that is objectionable in the way above
mentioned. I may apply my invention to flexible tubing made in the ordinary way
with caoutchouc packing in the joints, or with special packing, which forms part of
my invention, or I may apply it to tubing made without packing in the joints. The
special packing, which may be used in the joints in lieu of caoutchouc or its analogues,
consists of a thread or cord covered with a composition consisting mostly of oxidised
or solidified vegetable oil stiffened with resins or gums, this composition being applied
to the thread or cord in the same way as insulating material is made to cover electrical
conductors by passing the thread or cord through a die along with the composition in
a plastic condition which is at the same time forced through the die.
I use a similar composition applied in the same way to cover the exterior of flexible
tubing whether it be inade with packed joints or not, by passing the tubing itself
through a die along with the plastic composition under pressure.
I also, when it is desired, cover the interior of the tubing with the composition in
the following manner. I fill the length of tubing with the plastic compound and then
by means of fluid pressure I force through it a ball or a conoidal or spheroidal piston

page_text: of diameter somewhat less than the internal diameter of the tubing, thus displacing
the body of composition but leaving a layer of it forming an internal lining of the
tubing. The composition which I employ is of a kind which is very plastic when it is
warmed, and is elastic when cooled, retaining its elasticity and not being affected by
atmospheric influences nor by most of the liquids or gases for which the flexible tubing
may be used. Various oxidised or solidified vegetable oils with various resins and
gums may be used; but practically I find the following compositions very serviceable
in most cases for the purpose which I have in view.
For lining tubes internally I use a composition consisting of about 8 parts oxidised
linseed oil 1 part Resin, and 1 part Kaurie gum. For covering tubes externally, I
employ a similar composition with a smaller proportion of resin, and with various
ingredients to give colour and body if desired.
Dated this fith day of March 1888
ABEL & IMRAY,
Agents for the Applicant.

page_text: I FREDERICK WALTON of No. 2 Eaton Place Brighton in the County of Sussex
Manufacturer, 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 :-
Flexible metallic tubing is made by helically twisting a strip of metal with the
edges of the strip bent in such a manner that each convolution engages with the next,
the two contiguous edges forming together a more or less loose hook joint. Usually,
in order to prevent leakage through these joints and yet to allow sufficient movement
in them to give the flexibility, a strip of caoutchouc or analogous elastic packing
material is twisted along with the metal strip so as to occupy the clear space within
the hook joint of the contiguous convolutions. This packing is liable to be acted on
by the metal and by the liquids or gases to which it may be exposed, and thereby to
become deteriorated itself, or to have a detrimental action on substances coming in
contact with it. My invention relates to means of rendering the joints of such tubing
impervious without the use of packing that is objectionable in the way above
mentioned. I may apply my invention to flexible tubing made in the ordinary way
with caoutchouc packing in the joints, or with special packing, which forms part of
my invention, or I may apply it to tubing made without packing in the joints. The
special packing which may be used in the joints in lieu of caoutchouc or its analogues,
consists of a thread or cord covered with a composition consisting mostly of oxidised
or solidified vegetable oil stiffened with resins or gums, this composition being applied
to the thread or cord in the same way as insulating material is made to cover electrical
conductors by passing the thread or cord through a dic along with the composition in
a plastic condition which is at the same time forced through the die.
The coating of
the threads or cords may be effected by a simple appliance in the following manner :
A number of them being stretched parallel to one another with their ends passed
through dies arranged in a heated box containing the coating material, the box is drawn
along them so that they become coated. They are allowed to remain until the coating
sets sufficiently to prevent adhesion when the coated threads are reeled or otherwise
packed together, and, the better to prevent adhesion, they may be dusted with french
chalk. Threads coated as described may be united by heat and pressure. When
great elasticity is required, the core may itself be a thread or cord of india
rubber.
I use a similar composition to cover the exterior of flexible tubing whether it be
made with packed joints or not, by passing the tubing itself through a die along with
the plastic composition under pressure, as in the operation of coating wires with
insulating material.
I also, when it is desired, cover the interior of the tubing with the composition in
the following manner. I fill the length of tubing with the plastic compound and
then by means of fluid pressure I force through it a ball or a conoidal or spheroidal

page_text: piston of diameter somewhat less than the internal diameter of the tubing, thus
displacing the body of composition but leaving a layer of it forming an internal lining
of the tubing.
The composition which I employ is of a kind which is very plastic when
it is warmed, and is elastic when cooled, retaining its elasticity and not being affected
by atmospheric influences nor by most of the liquids or gases for which the flexible
tubing may be used.
Various oxidised or solidified vegetable oils with various resins and gums may be
used; but practically I find the following compositions very serviceable in most cases
for the purpose which I have in view.
For lining tubes internally I use a composition consisting of about 8 parts oxidised
or solidified linseed oil 1 part Resin, and part Kaurie gum. For covering tubes
externally I employ a similar composition with a smaller proportion of resin, and with
various ingredients to give colour and body if desired.
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 I
claim is :-
1. For covering or lining flexible metal tubing, or for covering the threads or cords
employed in the joints of such tubing, the use of a composition consisting of oxidised
or hardened vegetable oil, resin and Kaurie gun compounded substantially as
described.
2. The herein described method of lining flexible metal tubing by filling it
with suitable composition and forcing through it a piston of suitable shape and
size.
3. The manufacture and use of flexible metal tubing covered or lined or jointed
with the herein described composition applied substantially as herein described.
Dated this 4th day of December 1888
ABEL & IMRAY,
Agents for the Applicant