CERTAIN IMPROVEMENTS IN THE MANUFACTURE OF SALT
Year: 1824

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
FURNIVAL, of Andorton, in the County of Chester, Salt Manufacturer, send
greeting.
WHEREAS His present most Excellent Majesty King George the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Fourth day of December, in the fifth of His reign, did,
for Himself, His heirs and successors, give and grant unto me, the said
William Furnival, His especial licence that I, the said William Furnival,
my exors, admors, and assigns, or such others as I, the said William
Furnival, my exors, admors, or assigns, should at any time agree with, and
no others, from time to time and at all times during the term of years
therein expressed, should and lawfully might make, use, exercise, and vend,
within England, Wales, and the Town of Berwick-upon-Tweed, and also in
all His said Majesty's Colonies and Plantations abroad, my Invention of
"CERTAIN IMPROVEMENTS IN THE MANUFACTURE OF SALT;" in which said Letters
Patent there is contained a proviso obliging me, the said William Farnival,
by an instrument in writing under my hand and seal, particularly to describe
and ascertain the nature of my said Invention, and in what manner the
same is to be performed, and to cause the same to be enrolled in His said
Majesty's High Court of Chancery within six calendar months next and
immediately after the date of the said recited Letters Patent, as in and by
the same, reference being thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
William Furnival, do hereby declare the nature of my said Invention to
consist in a particular form of sides to a salting pan, in a new mode of heating
an upper salt pan where two are placed one over the other, in a new modo of
raking the salt from the pan, and in the application of a hot-water culvert for
assisting to heat the brine. And in further compliance with the said proviso, I,
the said William Furnival, do hereby describe the manner in which I perform
my said Invention by the following description thereof, reference being had to
the Drawing annexed, and the figures marked thereon, that is to say :—
DESCRIPTION OF THE DRAWING
Represents a section of two salt pans, with their furnaces and other
appurtenances arranged according to the plan comprised in my said Invention.
The brickwork represents the furnaces, and A, A, A, A, four sets of fire-bars.
B is what I call the under pan, having two sunk sides C, C; it will be seen
that these sides are kept cool and preserved from the action of the fire by
means of the brickwork D, D, and this causes the salt during the process of
evaporation to deposit much towards the said sides, and when so deposited
or raked there, as herein-after more particularly explained, it is preserved from
burning as in the ordinary mode of forming salt pans; and this constitutes my
said particular form of sides to a salt pan. And now of my said mode of
heating an upper salt pan. E is the said upper salt pan; F is a boarded steam
case between the two pans. G, G, are two sloping planes or roofs, in which are
the roofed openings H. By this arrangement it will be seen that as the
process of evaporation goes on steam rises into the chamber, and passes through
the roofed openings H, H, to the bottom of the upper boiler, where, having
performed its office of heating the brine in that boiler, such part of the steam
as becomes condensed falls down upon the planes G, G, and thence finds its
way into the pipe K, whence it descends into L, which is a culvert through
which the brine pipe M is made to pass. J, J, are two supports for the
bottom of the upper salt pan. P is a large pipe to admit the surplus steam
to pass up to a third pan, if required, but which is here shown with a cover on
it, not being here represented as in use. N,N, are two flues leading from the
ash pits S, S, and by means of the pipes O, O, leading through the planes
G, G; the object of this flue is to create a draft, when the damper of the ash
pits S, S, is closed, from the steam chamber towards the fire, which takes off
all the surplus air that it may be desirable to get rid of. T, T, are two rakes,
the handles of which pass through stuffing boxes V, V, for the purpose of
raking the salt that falls to the bottom of the pan B, B, into the sides C, C.

page_text: Now whereas I have herein described the whole apparatus required for
evaporating salt for the purpose of better elucidation, but I confine my claim
to exclusive privilege to the following particulars only, that is to say:-
First, to the peculiar formed sides C, C, of the salt pan B, B.
Secondly, to the inclined planes and roofed opening G, G, and H, H.
Thirdly, to the hot-water culvert L
Fourthly, to the particular application of the rake and stuffing box T & V.
And,
Fifthly and lastly, for the application of the flues N, N, and pipes O, O.
And these said last-mentioned five particulars being to the best of my
knowledge and belief entirely new, and never before used within that part of
His said Majesty's United Kingdom of Great Britain and Ireland called
England, His Dominion of Wales, or Town of Berwick-upon-Tweed, nor in
any of His said Majesty's Colonies or Plantations abroad, I do hereby declare
this to be my Specification of my said improvements, and that I do verily
believe this my said Specification doth comply in all respects fully and without
reserve or disguise with the proviso in the said herein-before in part recited
Letters Patent contained; wherefore I do hereby, claim to maintain exclusive
right and privalege to my said Invention.
In witness whereof, I, the said William Furnival, have hereunto set. my
hand and seal, this Fourth day of June, in the year of our Lord One
thousand eight hundred and twenty-five.
WILLIAM (L.s.) FURNIVAL.
AND BE IT REMEMBERED, that on the Fourth day of June, in the
year of our Lord 1825, the aforesaid William Furnival came before our
said Lord the King in His Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Inrolled the Fourth day of June, in the year of our Lord One thousand
eight hundred and twenty-five.