AN IMPROVED COMPOSITION FOR BEDDING AND RENDERING BRICKS IN FURNACES
Year: 1856

page_text: LETTERS PATENT to William Jacobs, of Albert Road, Globe Fields, Mile
End, in the County of Middlesex, for the Invention of "AN IMPROVED
COMPOSITION FOR BEDDING AND RENDERING BRICKS IN FURNACES."
Sealed the 19th May 1857, and dated the 21st November 1856.
PROVISIONAL SPECIFICATION left by the said William Jacobs at the
Office of the Commissioners of Patents, with his Petition, on the 21st
November 1856.
I, WILLIAM JACOBS, of Albert Road, Globe Fields, Mile End, in the
County of Middlesex, do hereby declare the nature of the Invention for
"AN IMPROVED COMPOSITION FOR BEDDING AND RENDERING BRICKS IN FURNACES,"
to be as follows:-
This Invention consists in the use of a composition of the following ma-
terials for bedding and rendering bricks in furnaces, videlicet, loam (by pre-
ference a sandy loam), hydraulic lime, ground malm, fire ashes, pulverized
chalk flints, and Portland cement; these materials are to be mixed with water
to the consistency of mortar, and the bricks bedded therein, as when fire clay
is used, and they may also be rendered with the same composition.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Jacobs in the Great Seal Patent Oflice on the
21st May 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
JACOBS, of Albert Road, Globe Fields, Mile End, in the County of Middlesex,
send greeting.
.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-first day of November, in the year of our
Lord One thousand eight hundred and fifty-six, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William Jacobs, Her special licence that I, the said William Jacobs, my
executors, administrators, and assigns, or such others as I, the said William
Jacobs, 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
terin therein expressed, should and lawfully might mako, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVED COMPOSITION FOR
BEDDING AND RENDERING BRICKS IN FURNACES," upon the condition (amongst
others) that I, tho said William Jacobs, 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 Patont Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Jacobs, do hereby declare the
naturo 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:
This Invention consists in the use of an improved composition for bedding
and rendering bricks in furnaces. The composition consists of the following
materials-One yard of loam, by preference of that description which is
found in Kent, and known as black foot loam; three yards of pulverized
chalk flints, or for this description of sand other sharp sand, such as river or
road sand, may be substituted; and one yard of hydraulic or stone lime which
has been previously slacked by exposure in the air.
The materials above mentioned produce by themselves an excellent con-
position for bedding and rendering bricks in furnaces, but I have sometimes

page_text: added to them the following other substances, viz., one half yard of ground
malm bricks, and one third of a yard of breeze or fire ashes.
In place of the lime mentioned as forming part of the composition, I some-
times substitute an equal quantity of Portland cement; or a part only of the
lime may be replaced by cement, if it is preferred.
The materials are to be mixed with water to the consistency of mortar, and
in the composition so prepared the bricks are to be bedded in the ordinary
manner, and they may afterwards be rendered with the same composition.
It will be found that my improved composition will adhere to the bricks of
the furnace with much greater tenacity than fire clay when exposed to a
high heat, and it will not, as the fire clay does, scale off and fall out of the
joints.
In witness whereof, I, the said William Jacobs, have hereunto set my
hand and seal, this Twenty-first day of May, in the year of our Lord
One thousand eight hundred and fifty-seven.
Witness,
JNO. ALCOCK.
WILLIAM JACOBS. (L.S.)