IMPROVEMENTS IN MATERIALS FOR INSULATING TELEGRAPHIC WIRES, PART OF WHICH MATERIAL IS ALSO APPLICABLE TO COVERING OTHER SUBSTANCES, AND RENDERING THEM WATERPROOF.
Year: 1874

page_text: LETTERS PATENT to John Macintosh, of Westminster, in the County
of Middlesex, Civil Engineer, for the Invention of "IMPROVEMENTS IN
MATERIALS FOR INSULATING TELEGRAPHIC WIRES, PART OF WHICH MATERIAL
IS ALSO APPLICABLE TO COVERING OTHER SUBSTANCES, AND RENDERING THEM
WATERPROOF.
"
Sealed the 2nd April 1874, and dated the 4th February 1874.
PROVISIONAL SPECIFICATION left by the said John Macintosh at the
Office of the Commissioners of Patents, with his Petition, on the
4th February 1874.
I, JOHN MACINTOSH, of Westminster, in the County of Middlesex,
Civil Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MATERIALS FOR INSULATING TELEGRAPHIC WIRES, PART OF
WHICH MATERIAL IS ALSO APPLICABLE TO COVERING OTHER SUBSTANCES, AND
RENDERING THEM WATERPROOF," to be as follows:-
The objects of the first part of my Invention are to lessen the expence
I of materials for insulating telegraphic wires, and consists of mixing

page_text: cotton seed pitch with caoutchow until it becomes a hot plastic letro-
gineous mass, in which state it can be put on the wires by the machines
used for that purpose.
The 2 parts of my Invention are to lessen the expence of waterproofing
other substances, such as cloth and other materials, and consists in using
cotton seed pitch alone, or in combination with other materials, and can
be put on to cloth in a hot plastic state by rollers, or disolved by its
solvents, and spread with a brush on surfaces, and in some cases it may
be vulcanised.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Macintosh in the Great Seal Patent Office on
the 4th August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MACINTOSH, of Westminster, in the County of Middlesex, Civil
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of February, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said John Macintosh, Her special licence
that I, the said John Macintosh, my executors, administrators, and
assigns, or such others as I, the said John Macintosh, 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
MATERIALS FOR INSULATING TELEGRAPHIC WIRES, PART OF WHICH MATERIAL IS
ALSO APPLICABLE TO COVERING OTHER SUBSTANCES, AND RENDERING THEM WATER-
PROOF," upon the condition (amongst others) that I, the said John'
Macintosh, 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

page_text: 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 John Macintosh, 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 :-
The object of the first part of my Invention is to lessen the expence of
materials for insulating telegraphic wires, and this part of my Invention
consists in mixing cotton seed pitch with caoutchouc by means of rollers
or otherwise until it becomes a hot plastic heterogenous mass, in which
state it can be put on the wires by the machines ordinarily used for this
purpose.
The second part of my Invention is designed to lessen the expense of
waterproofing other substances, such as cloth and other materials, and
consists in using cotton seed pitch alone, or in combination with other
materials. The same can be put upon cloth in a hot plastic state by
rollers, which in some cases may be heated, or it may be dissolved by its
solvents, and spread with a brush on any surface, and in some cases it
may be vulcanized.
In witness whereof, I, the said John Macintosh, have hereunto set
my hand and scal, this Fourth day of August, in the year of our
Lord One thousand eight hundred and seventy-four.
Witness,
HENRY JAMES NOONE,
8, Southampton Buildings,
London.
JOHN MACINTOSH. (L.S.)