IMPROVEMENTS IN FLEXIBLE TUBES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I MAURICE BAUER of the firm of M. Bauer & Co of 6 Union Court Chambers,
Old Broad Street, in the City of London Engineer, do hereby declare the nature of
my. Invention for "IMPROVEMENTS IN FLEXIBLE TUBES" A communication from
abroad by Philippe Sorgue, of 9 Passage Corbeau, Paris, in the Republic of France
to be as follows:-
'
The object of my invention is to manufacture flexible tubes, suitable for flexible
shafting, electrical wires, speaking tubes,.gas or water pipes, and other analogous
purposes.
9 j
In carrying out my invention, I form the outer skin of the tube of thin metal, or
of woven or twisted wire, or.of spiral wire, spirally laid in a Coil.
Inside this outer skin I place a coil of wire, the coils of which may be either close
together or distended. This coil acts as a frame work or support to the outer skin,
and retains the sectional form, and prevents the same from becoming distorted and
losing its circular shape.
Another construction consists in lining tubes formed as last described, with.
a lining of india rubber, gutta percha, leather, or other suitable material, non-
conducting or otherwise. And another method consists in interposing between an
inner spiral wire and an outer metallic skin, a lining or tube of india rubber, gutta
percha, leather or other suitable material.
The introduction of an inner lining of india rubber tube is readily effected by
means of an attached cord, as the pulling of the india rubber reduces the diameter,
and, when so drawn thereinto, it resumes its expanded form and impinges forcibly
against the spiral wire, thus fixing the same in position as a lining.

page_text: COMPLETE SPECIFICATION.
I MAURICE BAUER of the firm of M. Bauer & Co of 6 Union Court Chambers,
Old Broad Street, in the City of London, Engineer, do hereby declare the nature of
my said Invention for, "IMPROVEMENTS, IN, FLEXIBLE TUBES," a communication
from abroad by Philippe Sorgu, of 9 Passage Corbeau, Paris, in the Republic of
France 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 my invention is to manufacture flexible tubes, suitable for flexible
shafting, electrical wires, speaking tubes; gas or water pipes, and other analogous
purposes.
In carrying out my invention, I form the outer skin of the tube of thin metal, or
of woven or twisted wire, or of spiral wire, spirally laid in a coil.
Inside this outer skin I place a coil of wire, the coils of which may be either close
together or distended. This coil acts as a frame work or support to the outer skin,
and retains the sectional form, and prevents the same from becoming distorted and
losing its circular shape.
Another construction consists in lining tubes formed as last described, with
a lining of india rubber, gutta percha, leather, or other suitable material, non-
conducting or otherwise. And another method consists in interposing between an
inner, spiral wire and an outer metallic skin, a lining or tube of india rubber, gutta
percha, leather or other suitable material.
The introduction of an inner lining of india rubber tube is readily effected by
means, of an attached cord, as the pulling of the india rubber reduces the diameter,
and, when so drawn thereinto, it resumes its expanded form and impinges forcibly
against the spiral wire, thus fixing the same in position as a lining.
And in order that my said invention may be more particularly described and
ascertained, reference is hereby made to the accompanying drawings:-
In Fig. 1A is the-internal-metallic-core, consisting of spiral wire, which supports
the metallic skin or cover B, and prevents the distortion of the same, without
materially lessening its flexibility.
Fig. 2 represents the foregoing, with the addition of an internal lining c, of india
rubber, leather, gutta percha, or other flexible material. The method of introducing
this internal lining being shewn at D in Fig. 2.
c
Fig. 3 shews one method of forming the outer metallic cover, of plaited or woven
wire E.
Fig. 4 shews another form of outer casing, in which the wire F is knitted, and
Fig. 5 shews another form of outer casing of knitted wire.
Instead of the coiled wire being used in open form, as shewn at A in Figs. 1
and 2, it is sometimes used in close form, as shewn at A" in Figs. 2. 3. 4 and 5.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1 In the manufacture of flexible tubes, the combination of an internal metallic
spiral wire A with a metallic casing B, substantially as and for the purposes
described, and shewn in Fig. 1 of the drawings,

page_text: 2 In the manufacture of flexible tubes as aforesaid, the combination therewith
of an internal lining c, substantially as described, and shewn in Fig. 2 of the
drawings.
3 In the manufacture of flexible tubes as aforesaid, the use of an external
plaited or woven wire casing, substantially as described and shewn in Fig. 3 of the
drawings.
4 In the manufacture of flexible tubes as aforesaid, the use of an external looped
or knitted casing of wire, substantially as described and shewn in Figs. 4 and 5 of
the drawings.
5 In the manufacture of flexible tubes as aforesaid, the use of exterior covers of
metallic plaits or circular net work.
6 The general construction, combination, and arrangement of the several and
respective component parts of flexible tubes, substantially as described and shewn
on the drawings.
GEO. DOWNING,
Agent for Applicant.