AN IMPROVEMENT IN THE MANUFACTURE OF GLASS-HOUSE POTS
Year: 1864

page_text: LETTERS PATENT to Edward Brooke, the younger, of the Field House
Fire-clay Works, Huddersfield, in the County of York, Manufacturer
of Fire Bricks, Gas Retorts, Glass-house Pots, Crucibles, Chimney
Pots, and Sanitary Pipes, for the Invention of "AN IMPROVEMENT IN THE
MANUFACTURE OF GLASS-HOUSE POTS."
Sealed the 6th June 1865, and dated the 12th December 1864.
PROVISIONAL SPECIFICATION left by the said Edward Brooke at the
Office of the Commissioners of Patents, with his Petition, on the 12th
December 1864.
I, EDWARD BROOKE, the younger, of the Field House Fire-clay Works,
Huddersfield, in the County of York, Manufacturer of Fire Bricks, Gas
Retorts, Glass-house Pots, Crucibles, Chimney Pots, and Sanitary Pipes, do
hereby declare the nature of the said Invention for "AN IMPROVEMENT IN THE
MANUFACTURE OF GLASS-HOUSE POTS," to be as follows:-
This improvement consists in the admixture with fire-clay of a siliceous
stone, known as galliard, gannister, crowstone, or quartz rock, siliceous
quartz, or a silicate of lime, known as the body of the dinas brick. The
process by which I effect this improvememt is as follows:-I take the stone
previously described and burn it. I then grind and mix it with good fire-clay
and water, in the proportion of three parts of the former to one part of the
latter, or half and half, or in other proportions according to the quality of pot
required to be produced. Or, instead of burning the said stone, I simply
grind and mix it with fire-clay and water. The mixture or compound is then

page_text: treated in the usual manner for the manufacture thereof of glass-house pots,
which, by this means, are rendered capable of withstanding a much greater or
more intense heat than heretofore.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edward Brooke in the Great Seal Patent Office on the 10th
June 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
BROOKE, the younger, of the Field House Fire-clay Works, Huddersfield, in
the County of York, Manufacturer of Fire Bricks, Gas Retorts, Glass-house
Pots, Crucibles, Chimney Pots, and Sanitary Pipes, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of December, in the year of our
Lord One thousand eight hundred and sixty-four, in the twenty-eighth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Edward Brooke, the younger, Her special licence that
I, the said Edward Brooke, the younger, my executors, administrators, and
assigns, or such others as I, the said Edward Brooke, the younger, 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 "AN IMPROVEMENT
IN THE MANUFACTURE OF GLASS-HOUSE POTS," upon the condition (amongst
others) that I, the said Edward Brooke, the younger, 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 Edward Brooke, the younger, 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 (that is to say) :-
:-
This improvement consists in the admixture with fire-clay of a siliceous
stone, known as galliard, gannister, crowstone, or quartz rock, siliceous quartz,

page_text: or a silicate of lime, known as the body or material of which the dinas
brick is made. The process by which I effect this improvement is as
follows: I take the stone previously described and burn it, I then grind and
mix it with good raw ground, or burnt ground fire-clay and water, in the
proportion of three parts of the former to one part of the latter, or half and half,
or in other proportions, according to the quality of pot required to be produced.
Or, instead of buruing the said stone, I simply grind and mix it with fire-clay
and water. The mixture or compound is then treated in the usual manner
for the manufacture thereof of glass-house pots, which, by this means, are
rendered capable of withstanding a much greater or more intense heat than
heretofore.
It will be observed that the mixture or compound may be in any desirable
proportions, according to the quality of pot required to be produced, thus by
using a large proportion of the siliceous stone such pots will withstand a
greater amount of heat than when only a small proportion is employed.
Having described the nature of my Invention and the manner in which the
same is or may be performed, or carried into practical effect, I would have it
understood that I do not confine or restrict myself to any precise proportions
of the mixture of materials described, but claim as of my Invention (which I
believe to be new within this realm) the admixture with raw ground, or burnt
ground fire-clay for the manufacture of glass-house pots of a siliceous stone,
known as gannister, galliard, crowstone, or quartz rock, siliceous quartz, or
a silicate of lime, known as the material of which the "dinas brick" is
made.
In witness whereof, I, the said Edward Brooke, the younger, have
hereunto set my hand and seal, this Ninth day of June, One
thousand eight hundred and sixty-five.
EDWARD BROOKE, JUN. (L.S.)
Signed, sealed, and delivered by the
within-named Edward Brooke,
the younger, in the presence of
WM. TASKER,
Patent Agent,
Halifax.