IMPROVEMENTS IN ELECTRIC TELEGRAPH ROPES OR CABLES
Year: 1858

page_text: LETTERS PATENT to Charles Llewellyn Light, of Pall Mall East, in the
County of Middlesex, Engineer, for the Invention of "IMPROVEMENTS IN
ELECTRIC TELEGRAPH ROPES OR CABLES."
Sealed the 11th February 1859, and dated the 13th August 1858..
PROVISIONAL SPECIFICATION left by the said Charles Llewellyn Light at
the Office of the Commissioners of Patents, with his Petition, on the
13th August 1858.
I, CHARLES LLEWELLYN LIGHT, of Pall Mall East, in the County of
Middlesex, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN ELECTRIC TELEGRAPH ROPES OR CABLES," to be as follows:-
The object of the first part of my Invention is to enable the conducting
wires of electric telegraph ropes or cables to yield without injury to any strain
which the outer protecting wires may be capable of resisting; and the objects
of the second part are to prevent the outer protecting wires from tending to
unwind, also to increase the strength of the rope or cable.
My Invention consists, first, in winding the copper or other conducting
wires of electric telegraph. ropes or cables around a central core of gutta percha
or other suitable material; and, secondly, in winding the outer protecting wires
of such ropes or cables in two layers or sets, one layer or set being laid in
a direction contrary to that of the other; or in plaiting or braiding the said
wires over the insulating material by means of a suitable plaiting or braiding
machine..

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Llewellyn Light in the Great Seal Patent Office on
the 12th February 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
LLEWELLYN LIGHT, of Pall Mall East, in the County of Middlesex, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of August, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Llewellyn Light, Her special licence that I, the said Charles
Llewellyn Light, my executors, administrators, and assigns, or such others as
I, the said Charles Llewellyn Light, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all.
times thereafter during the term therein expressed, should and lawfully
might make, use, exercise and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN ELECTRIC TELEGRAPH ROPES OR CABLES," upon the condition
(amongst others) that I, the said Charles Llewellyn Light, my executors or
administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Charles Llewellyn Light, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement thereof, reference being had to the Drawing hereunto
annexed, that is to say:-
The object of the first part of my Invention is to enable the conducting
wires of electric telegraph ropes or cables to yield without injury to any strain
which the outer protecting wires may be capable of resisting; and the objects
of the second part are to prevent the outer protecting wires from tending to
unwind, also to increase the strength of the rope or cable.
My Invention consists, first, in winding the copper or other conducting wires
of electric telegraph ropes or cables around a central core of gutta percha or
other suitable material; and, secondly, in winding the outer protecting wires or

page_text: strands of any suitable protecting material of such ropes or cables in two layers
or sets, one layer or set being laid in a direction contrary to that of the other.
The accompanying Drawing illustrates the manner in which I carry my
Invention into effect. a is a central core of gutta percha; b, b, are the con-
ducting wires; c is a layer of insulating material covering the conducting wires;
d is a casing or covering of tarred hemp or other like suitable material; e is a
layer of wire covering the tarred hemp; and fis a second layer of wire running
in the reverse direction to the first layer e. The Drawing shews two conduct-
ing wires, but there may be one, two, three, or more, all laid in a similar
manner over and round a central core.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim,-
First, the winding of copper or other conducting wires of electric telegraph
ropes or cables around a central core of gutta percha or other suitable material,
as herein-before described and represented in the Drawing hereunto annexed.
And, second, protecting the conducting wire or wires of electric telegraph
ropes or cables, by means of two separate layers or sets of wires or strands of
any suitable protecting material, one layer or set being laid in a direction
contrary to that of the other.
In witness whereof, I, the said Charles Llewellyn Light have hereunto
set my hand and seal, this Twelfth day of February, One thousand
eight hundred and fifty-nine.
CHAS. L. LIGHT. (L.S.)