IMPROVEMENTS IN THE MANUFACTURE OF DINAS FIRE- BRICKS
Year: 1872

page_text: LETTERS PATENT to Robert Francis Lascelles Jenner, of Kidwelly,
South Wales, Dinas Fire-brick Manufacturer, for the Invention of
DESIRE PRINT "
Sealed the 21st March 1873, and dated the 23rd November 1872.
PROVISIONAL SPECIFICATION left by the said Robert Francis
Lascelles Jenner at the Office of the Commissioners of Patents,
with his Petition, on the 23rd November 1872.
I, ROBERT FRANCIS LASCELLES JENNER, of Kidwelly, South Wales,
Dinas Fire-brick Manufacturer, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF DINAS FIRE-
BRICKS," to be as follows:-
For this
the
My Invention has for its object the manufacture of Dinas fire-bricks
in such a manner as to adapt them for use in steel furnaces, or other
furnaces in which they are exposed to great heat.
clay, millstone grit, and other materials of which the Dinas fire-brick is
composed are ground to a powder by means of rollers, edge runners, or
purpose

page_text: other suitable mechanism without the addition of lime as usual, and the
said materials when so reduced to powder and forming the material for
each brick are subjected to very great pressure by means of the press,
for which a Patent was granted to Henry Large, bearing date 27th June
1868, No. 2073, or any other suitable press may be employed for the 5
purpose.
By means of the said pressure the particles of material composing
each brick are brought into such close adhesion as to admit of each
brick being taken directly from the machine to the kiln and there
stacked, thereby dispensing with the ordinary process of drying and 1
the admixture of lime, and producing a brick that is harder and less
liable to break than when manufactured in the ordinary manner.. The
brick made in the manner stated is much closer in texture than usual,
and is capable of resisting a much greater heat than when made in the
ordinary manner.
When bricks are required for use in hollow fires a small quantity of
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Francis Lascelles Jenner in the Great
Seal Patent Office on the 21st May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
FRANCIS LASCELLES JENNER, of Kidwelly, South Wales, Dinas Fire-
brick Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of November, in the
year of our Lord One thousand eight hundred and seventy-two, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Robert Francis Lascelles Jenner,
Her special license that I, the said Robert Francis Lascelles Jenner,
my executors, administrators, and assigns, or such others as I, the
said Robert Francis Lascelles Jenner, 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

page_text: Kingdom of Great Britain and Ireland, the Channel Islands, and Isle
of Man, an Invention for "IMPROVEMENTS IN THE MANUFACTURE OF DINAS
FIRE-BRICKS," upon the condition (amongst others) that I, the said
Robert Francis Lascelles Jenner, 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 Robert Francis Lascelles Jenner,
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 :-
My Invention has for its object the manufacture of Dinas fire-bricks
in such a manner as to adapt them for use in steel furnaces, or other
furnaces in which they are exposed to great heat. For this purpose the
clay, millstone grit, and other materials of which the Dinas fire-brick is
composed are ground to a powder by means of rollers, edge runners, or
other suitable mechanism without the addition of lime as usual, and the
said materials when so reduced to powder and forming the material for
each brick are subjected to very great pressure by means of the press,
for which a Patent was granted to Henry Large, bearing date 27th June
1868, No. 2073, or any other suitable press may be employed for the
purpose.
By means of the said pressure the particles of materials composing
each brick are brought into such close adhesion as to admit of each
brick being taken directly from the machine to the kiln and there
stacked, thereby dispensing with the ordinary process of drying and the
admixture of lime, and producing a brick that is harder and less liable
to break than when manufactured in the ordinary manner. The brick
made in the manner stated is much closer in texture than usual, and is
capable of resisting a much greater heat than when made in the ordinary
manner.
When bricks are required for use in hollow fires a small quantity of
alumina, not exceeding 30 per cent., is added in order to adapt them to

page_text: Having thus described the nature of my Invention, and in what
manner the same is to be performed, I claim,—
:
First. The manufacture of Dinas fire-bricks by pulverizing the materials
of which they are composed without the addition of lime, and subjecting
the pulverized materials to great compression in moulding; thereby i
rendering the bricks closer in texture and more capable of resisting heat,
substantially as herein described.
Second. The manufacture of Dinas fire-bricks suited for hollow fires
or for uses wherein they are subjected to cooling by pulverizing the
materials with the addition of a small quantity of alumina and moulding 1
under great pressure, substantially as herein described.
In witness whereof, I, the said Robert Francis Lascelles Jenner,
have hereunto set my hand and seal, this Twentieth day of
May, in the year of our Lord One thousand eight hundred and
seventy-three.
1