AN IMPROVEMENT IN THE MANUFACTURE OF BRICKS
Year: 1852

page_text: LETTERS PATENT to Joseph Hamblet, of Oldbury, in the County
of Worcester, Brick Manufacturer, and William Dean, of Old-
bury aforesaid, Agent, for the Invention of "AN IMPROVEMENT
IN THE MANUFACTURE OF BRICKS."
Scaled the 13th June 1853, and dated the 13th December 1852.
PROVISIONAL SPECIFICATION left by the said Joseph Hamblet
and William Dean at the Office of the Commissioners of Patents,
with their Petition, on the 13th December 1852.
We, JOSEPH HAMBLET and WILLIAM DEAN, do hereby declare the
nature of the said Invention for "AN IMPROVEMENT IN THE MANUFAC-
TURE OF BRICKS" to be as follows:-
Our Invention consists in the addition of slack or coal dust to
the clay of which bricks are made. The said slack or coal dust
is mixed with the said clay in the processes of grinding and temper-
ing the same. We find one part of coal dust to sixty parts of clay
to answer very well; but we do not confine ourselves to any propor-
tions, as differences in the quality of the clay and in that of the
coal dust, as well as other circumstances, render a variation in the

page_text: SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said Joseph Hamblet and William Dean
in the Great Seal Patent Office on the 13th June 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we,
JOSEPH HAMBLET, of Oldbury, in the County of Worcester, Brick
Manufacturer, and WILLIAM DEAN, of Oldbury aforesaid, Agent,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirteenth day of December, in the
year of our Lord One thousand eight hundred and fifty-two, in the
sixteenth year
of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Joseph Hamblet and William Dean,
Her special licence that we, the said Joseph Hamblet and William
Dean, our executors, adininistrators, and assigns, or such others as
we, the said Joseph Hamblet and William Dean, 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 "AN IN-
PROVEMENT IN THE MANUFACTURE OF BRICKS," upon the condition (amongst
others) that we, the said Joseph Hamblet and William Dean, or one
of us, by an instrument in writing under our hands and seals, or
under the hand and seal of one of us, 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 we, the said Joseph Hamblet and Williain
Dean, do hereby declare the nature of the said Invention, and in
what manner the same is to be perforined, to be particularly described

page_text: and ascertained in and by the following statement thereof (that is
to say):
Our Invention consists in the addition of slack or coal dust to
the clay, to be made into bricks; the said slack or coal dust is mixed
with the said clay in the process of grinding and tempering the
We find one part by weight of coal dust to sixty parts by
weight of dry clay, to answer very well; but we do not confine our-
selves to any proportions, as differences in the quality of the clay, and
in that of the slack or coal dust, as well as other circumstances, make
a variation in the proportion necessary. The said addition of slack
or coal dust to the clay of which bricks are made facilitates, by its
combustion, the burning of the said bricks.
Although we prefer carrying our Invention into effect in the
manner herein-before described, yet we do not limit ourselves there-
to, as the same may be modified in various ways; for example, in-
stead of slack or coal dust, powdered coke or charcoal, or wood saw
dust, may be employed; and although we usually carry our Invention
into effect by mixing the said slack or coal dust with moist clay,
yet our Invention is also applicable to the manufacture of bricks
made from dry clay.
We claim as our Invention the introduction of slack or coal dust,
or other carbonaceous or combustible solid matter, into the clay of
which bricks are to be made, whether the said clay be used in a
moist or dry state.
In witness whereof, I, the said William Dean, have hereunto
set my hand and seal, this Ninth day of June, in the
vear of our Lord 1853.
Witness,
GEORGE SHAW.
WILLIAM DEAN. (L. s.)