THE MANUFACTURE OF SALT BY AN IMPROVED AND MORE ECONOMICAL MODE
Year: 1859

page_text: LETTERS PATENT to John Thompson of Witton, near Northwich, Cheshire.
and John Thompson, the younger, of Castle-Northwich, aforesaid, for
the Invention of "THE MANUFACTURE OF SALT BY AN IMPROVED AND MORE
ECONOMICAL MODE."
and John Thompson, the younger, of Castle-Northwich, aforesaid, for
the Invention of "THE MANUFACTURE OF SALT BY AN IMPROVED AND MORE
ECONOMICAL MODE.".
Scaled the 13th December 1859, and dated the 5th October 1859.
PROVISIONAL SPECIFICATION left by the said John Thompson and
John Thompson, the younger, at the Office of the Commissioners of
Patents, with their Petition, on the 5th October 1859.
We, JOHN THOMPSON, of Witton, near Northwich, Cheshire, and JOHN
THOMPSON, the younger, of Castle-Northwich, aforesaid, do hereby declare
the nature of the said Invention for "THE MANUFACTURE OF SALT BY
IMPROVED AND MORE ECONOMICAL MODE," to be as follows:-
This Invention relates to an improved method of conducting the heat
necessary for evaporating the brine in the process of manufacturing salt, and
consists in the use of a flue or tube of iron, or other suitable material extending
through the body of the salt water or brine, instead of the heat passing along
the outside of the pan, as heretofore commonly practised. The heat employed
may be either steam, hot water, or fire, which may be either generated in the
aforesaid flue or tube, or otherwise, as may be found most desirable in
practice.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Thompson and John Thompson, the younger, in the
Great Seal Patent Office on the 5th April 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
THOMPSON, of Witton, near Northwich, Cheshire, and JOHN THOMPSON, the
younger, of Castle-Northwich, aforesaid, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifth day of October, in the year of our Lord
One thousand eight hundred and fifty-nine, in the twenty-third year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said John Thompson and John Thompson, the younger, Her special
licence that we, the said John Thompson and John Thompson, the younger,
our executors, administrators, and assigns, or such others as we, the said
John Thompson and John Thompson, the younger, our executors, adminis-
trators, 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 THE MANUFACTURE OF SALT BY AN IMPROVED AND MORE
ECONOMICAL MODE," upon the condition (amongst others) that we, the said
John Thompson and John Thompson, the younger, our executors or adminis-
trators, by an instrument in writing under our, or their hands and seals, or
under the hand and seal of one of us, or them, 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 the John Thompson and John Thompson,
the younger, 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:―
This Invention relates to an improved method of conducting the heat
necessary for evaporating the salt water or brine in the process of manu-
facturing salt, and consists in the use of a flue or tube of iron, or other suitable
material extending through the body of the salt water or brine, instead of the
heat passing along the outside of the pan, as heretofore commonly practised.
The heat employed may be either steam, hot water, or fire, which may be

page_text: either generated in the aforesaid flue or tube, or otherwise, as may be found
most desirable in practice.
We would remark, that as the process of manufacturing salt by evaporation
is well known to salt manufacturers, we deem it unnecessary to enter into any
detailed description of such mode of manufacturing salt in this our Speci-
fication, and have therefore only described and set forth our improved mode of
manufacturing salt by evaporation, as above stated.
Having now fully described and set forth the nature and object of our
said Invention of "The Manufacture of Salt by an Improved and more
Economical Mode," we would remark in conclusion, that what we intend to
secure by the above in part recited Letters Patent, and declare as our Inven-
tion, is as follows:-We claim the arranging and disposing of one or more
flues or tubes, or conduits of heat in vessels or pans, such as are commonly used
for evaporating salt water or brine in the manufacture of salt, in such manner,
as that the said flue or flues, or tube or tubes, or conduits of heat shall pass
through the body of the salt water or brine contained in the aforesaid vessels
or pans, instead of the heat being conveyed and directed around the outside
of such said vessels or pans, as heretofore commonly practised in the manu-
facture of salt, as above stated. The object and intention of our said Invention
being to diffuse the heat necessary for evaporating the salt water or brine in a
speedy and efficient manner, by exposing the entire surface of the flue or flues,
tube or tubes, or conduits of heat in the salt water or brine, as above stated,
by which, as near as may be, the whole of the heat entering such said flue or
flues, tube or tubes, shall be given off to the salt water or brine which
surrounds the said flues or tubes, whereby great economy of fuel will be
effected.
In witness whereof, we, the said John Thompson and John Thompson,
the younger, have hereunto set our hands and seals, this Twenty-second
day of November, in the year of our Lord One thousand eight
hundred and fifty-nine.