IMPROVEMENTS IN THE MANUFACTURE OF ARTIFICIAL FUEL
Year: 1874

page_text: LETTERS PATENT to the Reverend Granville Hamilton Forbes, of
Broughton Rectory, in the County of Northampton, Clerk in Holy
Orders, for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
ARTIFICIAL FUEL."
Sealed the 12th January 1875, and dated the 10th November 1874.
PROVISIONAL SPECIFICATION left by the Reverend Granville Hamilton
Forbes at the Office of the Commissioners of Patents, with his
Petition, on the 10th November 1874.
I, the Reverend GRANVILLE HAMILTON FORBES, of Broughton
Rectory, in the County of Northampton, Clerk in Holy Orders, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
THE MANUFACTURE OF ARTIFICIAL FUEL," to be as follows:-
My said Invention is a further developement of the Inventions for
which Letters Patent, No. 2374, dated July 7th, 1874, and No. 2822,
dated August 15th, 1874, were granted to me.
My said former Inventions related to a new or improved method of
manufacturing Portland and other similar cement by the intimate

page_text: admixture of coke or coke breeze or its equivalent with the cement-
making materials (in the latter case without clay) before the calcination
of the same.
+
According to my present Invention I make use of the compound or
compounds above referred to for the manufacture of fuel. I may
sometimes use tar or similar bituminous substance in these compounds.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the Reverend Granville Hamilton Forbes in the Great Seal
Patent Office on the 10th May 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, the
Reverend GRANVILLE HAMILTON FORBES, of Broughton Rectory, in the
County of Northampton, Clerk in Holy Orders, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of November, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
eighth year of Her reign, did, for Herself; Her leirs and successors,
give and grant unto me, the said Granville Hamilton Forbes, Her special
licence that I, the said Granville Hamilton Forbes, my executors,
administrators, and assigns, or such others as I, the said Granville
Hamilton Forbes, 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, uso, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS IN THE MANUFACTURE OF ARTIFICIAL FUEL,'
upon the condition (amongst others) that I, the said Granville Hamilton
Forbes, 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.
L
$1

page_text: NOW KNOW YE, that I, the said Granville Hamilton Forbes, 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:-
My said Invention is a further developement of the Inventions for
which Letters Patent No. 2374, dated July 7th, 1874, and No. 2822,
dated August 15th, 1874, were granted to me.
The said Invention relates to the use of raw or unburnt Portland
cement as fuel. For this purpose I combine it intimately with a
sufficient quantity of coke or coke breeze or coal dust, and with tar or
pitch or similar bituminous substance. The ash of the coke or coal
being composed principally of silica and alumina forms when burnt one
of the constituents of the cement.
R
In carrying my Invention into practise I follow the method ordinarily
used in the manufacture of Portland cement, making use only of such
clay as is suitable for producing this cement. I intimately combine this
in suitable proportions with chalk in the usual manner. The "slip" is
then intimately mixed in the mill with finely ground coke or coke
breeze or coal dust. It is then dried in ovens, and afterwards either
reground with tar or pitch or similar bituminous substance, or it is
placed while hot in tar or in any similar bituminous substance, which is
capable of being rendered liquid by heat. When it has absorbed
sufficient of this liquid it is removed, and is then ready for use as fuel.
When reground with the tar or pitch or the like it is cut out of the mill
in pieces, and is then fit for use; it may be burnt in any furnace or
stove. When properly burnt the residue when ground will form
Portland cement..
The proportion of coke or coke breeze or coal dust employed will

page_text: "
Having thus fully described my said Invention, and the manner of
performing the same, I wish it to be understood that I do not claim the
use of chalk and common clay combined with coke or coal or tar as
fuel, but I claim, the use of raw or unburnt Portland cement (prepared
as above specified) as a fuel for general purposes.
In witness whereof, I, the said Granville Hamilton Forbes, have
hereunto set my hand and seal, this Eighth day of May,
in the year of our Lord, One thousand eight hundred and seventy-
five.
GRANVILLE H. FORBES. (L.s.)
HY. JA. NoONE.