Improvements in or relating to Electric Cables.
Year: 1899

page_text: Date of Application, 4th Nov., 1899
Complete Specification Left, 22nd May, 1900 -Accepted, 18th Aug., 1900
PROVISIONAL SPECIFICATION
Improvements in or relating to Electric Cables.
I, JOHN YOUNG BUCHANAN, Consulting Chemist, of 27, Nicolson Square,
Edinburgh in the County of Edinburgh, NB, do hereby declare the nature
of this invention to be as follows:-
This invention relates to electic cables and has for its object to construct a
cable which may be of use for various purposes, but is particularly applicable
for use in submarine work
According to this invention a conductor of suitable form and construction 18
first insulated with a coveung of guttapercha Over this covering is placed
one or several coatings of suitable thickness formed of a compound composed
of indiarubber and the substance commonly known as ozokeit. The whole
18 finally enclosed in an outer coating of guttapercha
The indiaiubber and ozoke it forming the compound may be combined in
various proportions in accordance with requirements
The whole cable may
be covered or not with an additional outer covering if found desirable It is
to be understood that the cable may include more than one conductor, each
conductor being enclosed in a separate guttapercha covering, and if deaned
entirely surrounded with the indiarubber and ozokerit compound The con-
ductors thus enclosed being surrounded with the outer guttapercha coat 28
above described
Dated this 4th day of November 1899
BOULT, WADE & KILBURN,
Agents for the Applicant.
COMPLETE DIEVITICATION.
Improvements in or relating to Electric Cables.
I, JOHN YOUNG BUCHANAN, Consulting Chemist, of 27, Nicolson Square,
Edinburgh, in the County of Edinburgh, N.B, 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 electric cables and has for its object to construct a
cable which may be of use for various purposes, but is particularly applicable
for use in submarine work
According to this invention a conductor of suitable form and construction 18
first insulated with a covering of guttapercha. Over this covering is placed
one or several coatings of suitable thickness formed of a compound composed
of indiarubber and the substance commonly known as ozokerit.
is finally enclosed in an outer coating of guttapercha.
The whole

page_text: In the accompanying diawings
Figure 1 is a side elevation of one construction of electric cable according
to this invention, parts of the various insulating coatings being removed for
the sake of clearness, and
Figure 2 18 a transverse section of the same on the line 2-2 of Figure 1
Like letters indicate like parts throughout the diawings.
A is a conductor formed, in the present example, of seven wires stranded
in the usual way Around the conductor A is placed a coating B of gutta-
percha This coating B is sunrounded by a covering C of a compound formed
of indiarubber and ozokerit, and the covering 18 in its turn enclosed in a
coating D of guttapercha
In some cases a layer of indiarubber and ozokerit compound may be placed
over the second guttapeicha coating in this case a third covering of guttapercha
is placed outside the second compound coating In like manner other alternate
coatings of guttapercha and compound may be provided but in all cases it 18
preferred that the innermost and outermost of such layers should be of gutta-
percha
The indiarubber and ozokent forming the compound may be combined in
various proportions in accordance with requiements and small quantities of
other substances such for example as shellac and resinous guttapeicha may, if
desired, be added thereto, the compound in any case consisting mainly of
ozokerit and indiaiubber It is found in practice that a compound comprising
40% of ozokerit and 60% of indiai ubber gives good results Another useful
compound is formed by adding to 60% of the above mentioned ozokent-ubber
mixture 40% of resinous guttapercha. In some cases a small proportion of
shellac is added to the rubber before it 18 mixed with the ozokerit. The above
mixtures are of course given merely by way of example, and the proportions
may be varied to suit the circumstances of particular cases
The whole cable may be covered with an additional outer covering such as
sheathing or armouring for example if found desirable It is to be understood
that the cable may include more than one conductor, each conductor being
enclosed in a separate guttapeicha covering, and if desired entirely surrounded
with the indiarubber and ozokent compound The conductors thus enclosed
are surrounded with the outer guttapeicha coat as above described
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same 18 to be performed, I declare that what
I claim 18:―
1 An electric cable comprising a conductor having alternate coatings of
guttapei cha and a compound consisting entuely on mainly of indiarubber and
ozokerit the innermost and outermost of such coatings being of guttapercha.
2 An electric cable comprising a conductor a coating of guttapercha round
the conductor a coating of a compound of indiarubber and ozokerit round the
guttapercha coating and another coating of gutta-percha round the compound
coating substantially as described.
1
1001
1000
JOHN YOUNG BUCHANAN,
Boult, Wade & Kilburn,
Agents for the Applicant.