Improvements in Lined Tubes or Hose of Caoutchouc, Gutta Percha, or similar materials.
Year: 1892

page_text: Date of Application, 16th Aug., 1892
Complete Specification Left, 27th Apr., 1893-Accepted, 27th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Lined Tubes or Hose of Caoutchouc, Gutta Percha,
or similar materials.
I, EMIL HEROLD, of Maybachufer No. 4, Berlin, Director, do hereby
declare the nature of this invention to be as follows:-
-
Tubes or hose of caoutchouc, gutta percha, or similar materials when used for
conveying air gas or steam impregnated with fatty or oily gases, petroleum vapour
and the like, or when subject internally to chemical action, are detrimentally acted
upon on their inner surfaces; for instance, caoutchouc becomes either dissolved or
exfoliated by the passage of oily gases, thereby restricting the sectional area of the
passage, or it is rendered hard and brittle by the heat of steam &c.
On account hereof the tubes soon become unserviceable.
According to my present invention such detrimental action is prevented by
providing such tubes or hose with a protective tubular articulated lining of metal
or leather, which at the same time serves to strengthen the tubes, and enables them
to withstand a considerably higher internal pressure. The thickness of such lining
tubes must be such as to afford a certain amount of flexibility, so that the flexibility
of the caoutchouc tube is, not too much interfered with.
Such lined tubes or hose are manufactured as follows: According to one
arrangement the tubes or hose of caoutchouc &c. are manufactured by themselves
with or without fabric or helical wire combined therewith, in the ordinary manner,
and the tubular lining is also manufactured by itself, and is made of an external
diameter slightly smaller than the internal diameter of the caoutchouc tube. The
lining tube is then coated on its outer surface with caoutchouc solution, or other
cementitious matter and is introduced into the caoutchouc tube, to which it conse-
quently becomes cemented by the said coating.
According to another modification, the caoutchouc tube or hose is formed upon
the lining tube as on a core. The metal lining tube is by preference formed of a
helically coiled metal band with overlapping convolutions, these being made either
plain cylindrical or with recessed portions fitting into each other; or the metal tube
may be made of separate short sections slightly tapered, so as to fit into each other
being secured together by pins; or again a continuous metal tube may be employed
formed with annular or helical corrugation to afford it a certain amount of
flexibility. When the lining tube is of leather, it may be strengthened by an
internal helical wire coil.
The lining tubes may be made sufficiently strong to withstand any internal
pressure to which they are subject, in which case the outer caoutchouc tube only
serves as a protective covering.
Dated this 16th day of August 1892.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Lined Tubes or Hose of Caoutchouc, Gutta Percha,
or similar materials.
I, EMIL HEROLD, of Maybachufer No. 4, Berlin, Director, 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 :-
Tubes or hose of caoutchouc, gutta percha, or similar materials, when used for

page_text: conveying air gas or steam impregnated with fatty or oily gases, petroleum vapour
and the like, or when subject internally to chemical action, are detrimentally acted
upon on their inner surfaces; for instance, caoutchouc becomes either dissolved or
exfoliated by the passage of oily gases, thereby restricting the sectional area of the
passage or it is rendered hard and brittle by the heat of steam &c. On account
hereof the tubes soon become unserviceable.
According to my present invention such detrimental action is prevented by
providing such tubes or hose with a protective tubular articulated lining of metal
or leather, which at the same time serves to strengthen the tubes, and enables them
to withstand a considerably higher internal pressure. The thickness of such lining
tubes must be such as to afford a certain amount of flexibility, so that the flexibility
of the caoutchouc tube is not too much interfered with.
Such lined tubes or hose are manufactured as follows. According to one
arrangement the tubes or hose of caoutchouc &c. are manufactured by themselves
with or without fabric or helical wire combined therewith in the ordinary manner,
and the leather tubular lining is also manufactured by itself, and is made of an
external diameter slightly smaller than the internal diameter of the caoutchouc
tube. The lining tube is then coated on its outer surface with caoutchouc solution,
or other cementitious matter and is introduced into the caoutchouc tube, to which
it consequently becomes cemented by the said coating.
According to another modification, the caoutchouc tube or hose is formed upon
the leather lining tube as on a core. The metal lining tube when such is employed
is by preference formed of a helically coiled metal band with overlapping
convolutions, these being made either plain cylindrical or with recessed portions
fitting into each other; or the metal tube may be made of separate short sections
slightly tapered, so as to fit into each other being secured together by pins; or
again, a continuous metal tube may be employed formed with annular or helical
corrugation to afford it a certain amount of flexibility.
Such metal linings are also coated with caoutchouc solution or other cementitious
matter before introducing them into the caoutchouc tube.
If caoutchouc is employed as cement, the metal tube will unite firmly with the
caoutchouc tube on being subjected to the vulcanising process.
Also in this case the metal lining tube may serve as core upon which caoutchouc
tube is formed.
On the accompanying drawings are shewn by way of example various arrange-
ments for carrying out my above described invention.
Fig. 1 shews a caoutchouc tube a with an internal flexible lining tube of leather b,
suitable for conduit pipes for air pressure, such for example as the coupling tubes
of the air pressure pipes of railway trains.
The leather tube can be protected internally by a helical coil b¹ of wire. In this
case the caoutchouc tube can withstand bending to a greater extent, as the wire
coil prevents the kinking of the leather tube.
Fig. 2 shews a caoutchouc tube a with an internal lining tube c of metal, which
is formed with annular or helical corrugations.
Fig. 3 shews a caoutchouc tube with an internal lining tube c¹ formed of a
helically coiled metal band or strip. Figs. 4 and 5 shew similar helically coiled
lining tubes formed in the known manner by means of a metal band having a
profile section.
Fig. 6 shews an inner lining tube c¹ formed of a number of separate metal rings
connected together in any suitable manner, that will allow of a certain degree of
flexibility of the tube. It will be evident that various other such forms of rings
may be employed so long as they fulfil the condition of affording a certain amount
of flexibility.
The lining tubes may also be made sufficiently strong and air tight in themselves
to serve for conducting air pressure, compressed gases or steam, in which cases the
caoutchouc tubes may simply serve as a protective covering for the internal tube
against external injury, kinking or excessive bending, crushing &c.

page_text: 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. Constructing tubes or hose of caoutchouc or gutta percha strengthened
internally and protected against the detrimental action of oily gases, hot steam or
vapours upon the internal surface by means of a leather or metal lining tube
secured to the outer tube by caoutchouc or other cementing material, substantially
as described.
2. A tube or hose consisting of the combination of a caoutchouc outer tube with
an internal lining tube of leather, secured to the outer tube by caoutchouc or other
cement, substantially as described.
הל .· נ.י.מ
I 1000
ABEL & IMRAY,
Agents for the Applicant