IMPROVEMENTS IN ELECTRIC TELEGRAPHS
Year: 1858

page_text: LETTERS PATENT to William Henry Preece, of 7, Bernard Street, Primrose
Hill, and Josiah Latimer Clark, of Adelaide Road, Haverstock Hill, both
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
ELECTRIC TELEGRAPHS."
PROVISIONAL SPECIFICATION left by the said William Henry Preece.
and Josiah Latimer Clark at the Office of the Commissioners of
Patents, with their Petition, on the 26th June 1858.
We, WILLIAM HENRY PREECE, of 7, Bernard Street, Primrose Hill, and
JOSIAH LATIMER CLARK, of Adelaide Road, Haverstock Hill, both in the
County of Middlesex, do hereby declare the nature of the Invention for
"IMPROVEMENTS IN ELECTRIC TELEGRAPHS," to be as follows:-
This Invention has for its object improvements in electric telegraphs. For
these purposes the ends of the line wires. are each, as heretofore, bound round
or fixed to an insulator fixed to a suitable terminal arm on a post or upright;
a leading-in wire coated with gutta percha is attached to the end of each line
wire, near where it is fixed to the insulator, and such coated leading-in wire
passes up through a tubular insulator, which is fixed at its upper part into
a cast-iron or other suitable arm, which is hollow. The coated leading-in

page_text: wire having passed into the hollow arm from the tubular insulator, is con-
ducted down in a hollow in the post or upright to which the arms are fixed;
the hollows, interior of the insulator, and the arm where the coated wire
passes, are filled up with-cement. By these means the portions of the leading-
in wire which are within the insulator and the arm will be protected, and the
insulation insured. The leading-in wires are attached to the line wires by
binding screws, intermediate of the tubular insulators and the line wires. It
is preferred that the tubular insulators through which the coated leading-in
wires pass into the hollow arms should have an inverted insulating cup sur-
rounding the hollow or tubular central part.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Henry Preece and Josiah Latimer. Clark in the
Great Seal Patent Office on the 24th December 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
HENRY PREECE, of 7, Bernard Street, Primrose Hill, and JOSIAH LATIMER
CLARK, of Adelaide Road, Haverstock Hill, both in the County of Middlesex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-sixth day of June, 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 us, the said
William Henry Preece and Josiah Latimer Clark, Her special licence that
we, the said William Henry Preece and Josiah Latimer Clark, our execu-
tors, administrators, and assigns, or such others as we, the said William Henry
Preece and Josiah Latimer Clark, our 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 "IM-
PROVEMENTS IN ELECTRIC TELEGRAPHS," upon the condition (amongst others) that
we, the said William Henry Preece and Josiah Latimer Clark, our executors
or administrators, by an instrument in writing under our or their hands and
seals, or under the hand and seal of one of us or them, should par-
ticularly 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

page_text: 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 Josiah Latimer Clark, on behalf of myself
and of the said William Henry Preece, do hereby declare the nature of the 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, that
is to say
This Invention has for its object improvements in electric telegraphs. For
these purposes the ends of the line wires are each, as heretofore, bound round
or fixed to an insulator fixed to a suitable terminal arm on a post or upright;
a leading-in wire coated with gutta percha is attached to the end of each line
wire, near where it is fixed to the insulator, and such coated leading-in wire
passes up through a tubular insulator, which is fixed at its upper part into a
cast-iron or other suitable arm, which is hollow. The coated leading-in wire
having passed into the hollow arm from the tubular insulator, is conducted
down in a hollow in the post or upright to which the arms are fixed; the
hollows, interior of the insulator, and the arm where the coated wire passes, are
filled up with cement. By these means the portions of the leading-in wire
which are within the insulator and the arm will be protected, and the
insulation insured. The leading-in wires are attached to the line wires by
binding screws intermediate of the tubular insulators and the line wires. It is
preferred that the tubular insulators through which the coated leading-in wires
pass into the hollow arms should have an inverted insulating cup surrounding
the hollow or tubular central part.
Having thus stated the nature of our said Invention, we will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 shows apparatus constructed according to our Invention; Figure 2
shows a section of the arm and insulator through which the leading-in wire
passes. a is an ordinary terminal insulator, to which the end of a line wire is
attached; 6 is an insulator through which the leading-in wire c passes. This
insulator is fixed by cement in the hollow end of the arm d, and this arm is
hollow, so that the leading-in wire may pass through it, and the post or
upright to which the apparatus is attached is also made hollow, so that the
insulated leading-in wire may be passed down within the hollow thereof. The end
of the leading-in wire is attached to the end of the line wire by binding screws
or otherwise. The hollow of the insulator 6 of the arm and of the upright or

page_text: post is filled in with cement, such as plaster of Paris, or others. The form of
the arm and of the insulator through which the leading-in wire is passed may
be varied.
What we claim is the combination of apparatus herein described.
In witness whereof, I, the said Josiah Latimer Clark, have hereunto
set my hand and seal, this Twenty-third day of December, in the
year of our Lord One thousand eight hundred and fifty-eight.
JOSIAH LATIMER CLARK. (L.S.)