A NEW METHOD OF SEPARATING SALT FROM THE ICE OF SEA WATER AND OBTAINING FRESH WATER THEREFROM.
Year: 1872

page_text: LETTERS PATENT to John Hildesheim, of Glasgow, in the County of
Lanark, North Britain, for the Invention of "A NEW METHOD OF
SEPARATING SALT FROM THE ICE OF SEA WATER AND OBTAINING FRESH WATER
THEREFROM.
"
Sealed the 5th July 1872, and dated the 10th January 1872.
PROVISIONAL SPECIFICATION left by the said John Hildesheim at the
Office of the Commissioners of Patents, with his Petition, on the
10th January 1872.
I, JOHN HILDESHEIM, of Glasgow, in the County of Lanark, North
Britain, do hereby declare the nature of the said Invention of “A New
METHOD OF SEPARATING SALT FROM THE ICE OF SEA WATER AND OBTAINING FRESH
WATER THEREFROM,” to be as follows, that is to say :—
This Invention has for its object to separate salt from frozen sea water
and to obtain saltless ice, which on being liquefied produces fresh or
saltless water.

page_text: The Invention is specially applicable for obtaining fresh water and ice
at sea, and it may be carried into effect by at first freezing sea water
either by a freezing machine or by chemicals under any of the modes
used or to be used for forming artificial ice, or ice naturally formed in
the sea may be similarly employed, as follows:-The salt ice to be con-
verted into saltless ice and water is subjected to pressure in a suitable
press, the effect of the pressure being to extrude the salt, leaving the ice
compact and pure, which on being liquefied constitutes water fit for
supplying the uses for which spring water is usually employed.
The press employed for the purpose herein-before described may be of 1
the screw, lever, or hydraulic type, it being an essential feature of such
press that the chamber or receptacle in which the ice is placed for being
pressed is constructed with perforated bottom and sides so as to allow the
salt and water extruded to pass freely off.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Hildesheim in the Great Seal Patent Office
on the 8th July 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, John
HILDESHEIM, of Glasgow, in the County of Lanark, North, Britain, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of January, in the year
of our Lord One thousand eight hundred and seventy-two, in the 35th
year of Her reign, did, for Herself, Her leirs and successors, give
and grant unto me, the said John Hildesheim,.Her special license that
I, the said John Hildesheim, my.executors, administrators, and assigns,
or such others as I, the said John Hildesheim, my executors, adminis-
trators, or 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 METHOD OF SEPARATING
SALT FROM THE ICE OF SEA WATER, AND OBTAINING FRESH WATER THEREFROM,"

page_text: upon the concution (amongst others) that 1, the said John Hildesheim,
by an instrument in writing under my hand and seal, should particu-
larly 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 John Hildesheim, 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, that is to say :-
My said Invention has for its object to extrude the salt from frozen
sea water in order to obtain saltless ice, which on being liquefied
produces fresh or saltless water.
.
The Invention is specially applicable for obtaining fresh water and
ice at sea and maritime localitics which are devoid of a supply of fresh
water, and it is carried into effect by at first freezing sea water either by
a freezing machine or by chemicals under any of the modes used or to
be used for forming artificial ice, or ice naturally formed in the sea may be
similarly employed as follows:-The salt ice to be converted into saltless
ice and water is subjected to pressure in a suitable press, the effect of
the pressure being to extrude the salt, leaving the ice compact and pure,
which on being liquefied constitutes water fit for supplying the uses for
which spring water is generally employed.
The press employed for the purpose herein-before described may be of
the screw, lever, or hydraulic type, it being an essential feature of such
press that the chamber or receptacle in which the ice is placed for being
pressed is constructed with perforated bottom and sides, so as to allow
the salt extruded to pass freely off.
Having now described the nature of my said Invention, and the
system, mode, or manner in or under which the same is or may be
used or practically carried into effect, I would observe in conclusion
that what I consider novel and original, and therefore claim as the
Invention secured to me by the herein-before in part recited Letters
Patent is, the obtainment of fresh water by freezing salt water and

page_text: submitting the ice to pressure, thereby extruding the salt, as herein-
before set forth.
In witness whereof, I, the said John Hildesheim, have hereunto
set my hand and seal, this Fifth day of July One thousand
eight hundred and seventy-two.