Improvements in or relating to Hose or Tubing."
Year: 1897

page_text: Date of Application, 1st Nov., 1897-Accepted, 4th Dec.,
1897
"Improvements in or relating to Hose or Tubing."
I, OSKAR BLÖDNER of Schtichtenstrasse 117, Gotha, in the Empire of Germany,
Manufacturer of Rubber Goods, 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 :-
The object of the present invention is to provide a tubing or hose which can be
used both for suction and for pressure purposes.
In existing spirally strengthened tubing the metal coil in the interior of the
tubing is generally covered by a layer of rubber.
One or if preferred several coverings of fabric and rubber are arranged around the
coil. When the tubing is used for fluid under pressure the coverings undergo a
greater or smaller amount of expansion according to the degree of pressure. The
coil which cannot follow the expansion consequently separates from the covering.
When the tubing is used for suction purposes the inner layer of rubber if this has
not already been done by the pressure action is completely detached or separated by
the suction action and the through-way in the tubing will be completely or partially
stopped up.
In order to prevent this stoppage the coil has been placed in the tubing uncovered
or only partially covered with rubber, which made stoppage impossible, but this
method has its drawback inasmuch as the inner walls of the tube would not be smooth
and the matter to be sucked through, such as sewage rag-pulp and the like, would
adhere to them and would cause the coil when severely bent to spring out of its
normal position to shift and the whole tubing would thus be made unfit for use.
It is sought to remove these defects and drawbacks by means of the suction and
pressure tubing interwoven with a metal coil, forming the object of the present
invention.
In the accompanying drawings the tubing shewn in Fig. 1 in perspective without
an outer covering and in Fig. 2 in section with the outer covering.
As may be seen on reference to the drawings the inner rubber tube 1 is surrounded
by a metal coil 3 which is interwoven with strips of fabric 4 arranged along the
length of the tubing, and covered with rubber in such a manner that the strips of
fabric 4 alternately overlap and under-lap the coil 3.
The whole is then surrounded by a rubber cover or envelope 5 and the parts
vulcanised together.
If required the tubing can also be covered with fabric as 6, or with a fabric and
rubber covering.
When such a tubing is employed as a pressure pipe resistance is offered by the
coil at regular and close intervals to the interwoven strips of fabric and consequently
there can be no great expansion and consequent separation of the parts. The woven
material further affords a firm bedding for the coil from which the most severe bends
cannot removed it.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. Rubber hose or tubing provided with spirally wound strengthening material,
comprising an internal rubber layer or tube and a surrounding coil woven with strips
or ribbons which pass alternately over and under the coil and are attached to the
tubing by vulcanization substantially as described.
2. The combination and arrangement of parts constituting the complete hose or
tubing substantially as described and illustrated in the accompanying drawings:
Dated this 1st day of November 1897
BOULT & WADE
Agents for the Applicant.