IMPROVEMENTS IN THE MANUFACTURE OF INSOLUBLE OILS AND GREASES
Year: 1865

page_text: LETTERS PATENT to Isaac Shimwell McDougall, of the City of Manchester,-
in the County of Lancaster, Manufacturing Chemist, for the Invention.of.
"IMPROVEMENTS IN THE MANUFACTURE OF INSOLUBLE OILS AND GREASES.:.
PROVISIONAL SPECIFICATION left by the said Isaac Shimwell McDougall:
at the Office of the Commissioners of Patents, with his Petition, on the
19th September 1865.
I, ISAAC SHIMWELL MCDOUGALL, of the City of Manchester, in the County
of Lancaster, Manufacturing Chemist, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE MANUFACTURE OF INSOLUBLE OILS AND
GREASES," to be as follows:-
ד-
This Invention consists in making alkaline, oils and greases insoluble yet
enabling them to retain their water.
I take about sixteen parts of oil, fat, or other saponifiable substance, and
slowly heat or melt it in a suitable vessel; I then add one part of wax which
is also melted with the oil, fat, or other substance. To this mixture I add an
alkali, still keeping the vessel heated, the strength of the alkali must be varied
by the required stiffness of the grease to be made; while still hot I add
sulphurous acid until the grease or mixture becomes totally or partially
insoluble as may be required. The wax, alkali, and sulphurous acid must be
varied both in quantity and strength according to the stiffness and quality of
grease required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Isaac Shimwell McDougall in the Great Seal Patent Office
on the 17th March 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ISAAC SHIM-
WELL MCDOUGALL, of the City of Manchester, in the County of Lancaster,
Manufacturing Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Nineteenth day of September, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Isaac Shimwell M°Dougall, Her special license that I, the said Isaac
Shimwell McDougall, my executors, administrators, and assigns, or such others
as I, the said Isaac Shimwell McDougall, 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
"IMPROVEMENTS IN THE MANUFACTURE OF INSOLUBLE OILS AND GREASES,". upon
the condition (amongst others) that I, the said Isaac Shimwell M°Dougall,
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 per
formed, 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 Isaac Shimwell McDougall, 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):-
This Invention consists in rendering oils, greases, and other saponifiable
substances capable of retaining water, and at the same time being either
wholly or in part insoluble in water. I take a quantity of oil, grease, or other
saponifiable substance, such as oils, fats, greases, wax, or similar substances,
and melt them in a suitable vessel. I add a required quantity of water, then
add a quantity of alkali or alkalies until the mass is sufficiently soluble. I
then, still keeping the composition heated, add sulphurous acid until the com-
position becomes partially or wholly insoluble in water.

page_text: Having now described the nature and particulars of my said Invention, and
he manner in which the same is to be performed, I desire it to be understood
hat I claim the addition of sulphurous acid to oils, greases, and other
saponifiable substances which have been acted upon by an alkali or alkalies,
hereby enabling them to retain water, and at the same time be either in part
or wholly insoluble in water.
In witness whereof, I, the said Isaac Shimwell M Dougall have hereunto
set my hand and seal, this Sixteenth day of March, in the year of our
Lord One thousand eight hundred and sixty-six.
Signed, sealed, and delivered by the
within-named Isaac Shimwell
McDougall, in the presence of,
G. SEPTIMUS HUGHES,
Patent Agent,
Manchester.
I. S. MCDOUGALL. (L.B.)