A NEW OR IMPROVED COOLING AND FREEZING MIXTURE
Year: 1853

page_text: LETTERS PATENT to Damiano Assanti, of Upper Berkeley Street,
in the County of Middlesex, Gentleman, for the Invention of "A
NEW OR IMPROVED COOLING AND FREEZING MIXTURE."
Sealed the 28th April 1854, and dated the 31st October 1853.
PROVISIONAL SPECIFICATION left by the said Damiano Assanti
at the Office of the Commissioners of Patents, with his Petition,
on the 31st October 1853.
I, DAMIANO ASSANTI, of Upper Berkeley Street, in the County of
Middlesex, Gentleman, do hereby declare the nature of the said Inven-
tion for "A NEW OR IMPROVED COOLING AND FREEZING MIXTURE" to be as
follows:-
The cooling and freezing mixture is formed by the addition of water
or other suitable liquid to chloride of lime, which I prefer to use
crystallized. The liquid and chloride of lime are placed in a suitable
vessel and there agitated. Should the matters not be sufficiently
cooled or frozen with one dose of the freezing mixture the process
must be repeated until the required degree of cold is imparted to
them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Damiano Assauti in the Great Seal Patent Office
on the 29th April 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, 1,
DAMIANO ASSANTI, of Upper Berkeley Street, in the County of Mid-
dlesex, Gentleman, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of October, in the
year of our Lord One thousand eight hundred and fifty-three, in the
seventeenth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Damiano Assauti, Her special
licence that the said Damiano Assanti, my executors, administrators,
and assigns, or such others as T, the said Damiano Assanti, 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 "A NEW OR IMPROVED COOL-
ING AND FREEZING MIXTURE," upon the condition (amongst others) that
I, the said Damiano Assanti, by an instrument in writing under my
hand and seal, should particularly describe and ascertain the nature of
the said Invention, and in what manuer the same was to be performed,
and cause the same to be filed in the Great Seul Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
.
NOW KNOW YE, that I, the said Damiano Assanti, 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 thereof, that is to say:
The cooling and freezing mixture is formed by the addition of water
or other suitable liquid to crystallized chloride of lime (which I prefer
to use reduced to powder), or by the addition of water to crystallized
chloride of calcium.
"
Since the date of my Provisional Protection I have discovered

page_text: that I obtain the most useful effect from the chloride of the metallic
base of lime (chloride of calcium). Although the chloride of lime
and water form a good cooling mixture I do not recommend the
use thereof as a freezing mixture, but the chloride of the metallic
base of lime (chloride of calcium) will be found highly efficient
when mixed with water only as a cooling and freezing mixture, and
for producing ice. The proportions which I employ are two parts
of chloride of calcium to one part of water. I am aware that chloride
of calcium with pounded ice or with snow has already been employed
as a freezing mixture, but I believe that its use with water only has
not heretofore been proposed. The liquid and chloride of lime or water
and chloride of calcium are placed in a suitable vessel so as to surround
or envelope the vessel containing the matters to be cooled or frozen,
and there agitated either by means of a revolving spatula, or by the
revolution of the vessel itself. Should the matters not be sufficiently
cooled or frozen with one dose of the cooling or freezing mixture, the
process must be repeated until the required degree of cold is imparted
to them.
And having now described the nature of my said Invention, and in
what manner the same is to be performed, I declare that what I claim
as my Invention is,―
The production of a cooling mixture by the addition of chloride of
Jime to water or other liquid, and of a cooling and freezing mixture
by the addition of chloride of calcium to water, as herein-before
described.
In witness whereof, I, the said Damiano Assanti, have hereunto
set my hand and seal, this Twenty-eighth day of April, One
thousand eight hundred and fifty-four.
DAMIANO ASSANTI. (L.S.)