AN IMPROVED METHOD OF PRODUCING OXYGEN
Year: 1866

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "AN
IMPROVED METHOD OF PRODUCING OXYGEN."-A communication from abroad
by Charles Raphael Maréchal and Cyprien Marie Tessié du Motay,
both of Metz, France.
Sealed the 9th July 1866, and dated the 10th January 1866.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 10th January 1866.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City
of London, Patent Agent, do hereby declare the nature of the said
Invention for "AN IMPROVED METHOD OF PRODUCING OXYGEN," to be as
follows:-
Manganates and permanganates of potassa, soda, and baryta, ferrates of
potassa, soda, and baryta, chromates of potassa, soda and baryta, and in
general all metallic oxides or acids which will form with potassa, soda, and
baryta binary combinations capable of superoxidizing possess the property
of yielding their oxygen at a more or less elevated temperature when they
are submitted to the action of a current of steam. These bodies thus
deoxidized also possess the property of becoming reoxidized when they

page_text: are exposed to the action of a current of air at a temperature more or less
great.
The present Invention, consisting in the direct production of oxygen by
means of atmospheric gas, is based upon the double property just cited.
I place in a retort or other distillatory vessel one of the binary compounds
above mentioned, whether at the minimum or at the maximum state of
oxidation. If the binary compound is at the minimum state of oixdation
I superoxidize it by means of a current of air drawn or impelled mecha-
mically, or drawn by a chimney serving the purpose of producing draught.
If the compound is at the maximum state of oxidation 1 deoxidize it by
means of a current of steam or by injecting water; the oxygen and the
steam on issuing from the retort pass together into a condenser; the steam
is condensed and the oxygen passes on to a gasholder in which it is col-
lected. When all the utilizable oxygen contained in the binary compound
has been disengaged by the action of the steam the operation of super-
oxidation by means of air is recommenced, and vice versa.
The pro-
duction of oxygen is continued in this alternate manner as long as
may be required.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by Amelia Susannah Brooman in the Great Seal Patent Office
on the 10th July 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, AMELIA
SUSANNAH BROOMAN, of Twickenham, in the County of Middlesex, Widow
and sole Executrix of Richard Archibald Brooman, late of 166, Fleet
Street, in the City of London, Patent Agent, deceased, 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 sixty-six, in the twenty-ninth
year of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Amelia Susannah Brooman, Her special licence that I, the
said Amelia Susannah Brooman, my executors, administrators, and assigns,
or such others as I, the said Amelia Susannah Brooman, 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,

page_text: and Isle of Man, an Invention for "AN IMPROVED METHOD. OF PRODUCING
OxYеxx," (communicated to the said Richard Archibald Brooman from
abroad by Charles Raphael Maréchal and Cyprien Marie Tessié du
Motay, both of Metz, France,) upon the condition (amongst others) that
I, the said Amelia Susannah Brooman, 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 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 Amelia Susannah Brooman, 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 :-
Manganates and permanganates of potassa, soda, and baryta, ferrates of
potassa, soda, and baryta, chromates of potassa, soda, and baryta, and in
general all metallic oxides or acids which will form with potassa, soda, and
baryta binary combinations capable of superoxidizing possess the property
of yielding their oxygen at a more or less elevated temperature when they
are submitted to the action of a current of steam. These bodies thus
deoxidized also possess the property of becoming reoxidized when they are
exposed to the action of a current of air at a temperature more or less great.
The present Invention consisting in the direct production of oxygen by
means of atmospheric gas is based upon the double property just cited. I
place in a retort or other distillatory vessel one of the binary compounds
above mentioned, whether at the minimum or at the maximum state of
oxidation. If the binary compound is at the minimum state of oxidation
I superoxidize it by means of a current of air drawn or impelled mecha-
nically, or drawn by a chimney serving the purpose of producing draught.
If the compound is at the maximum state of oxidation I deoxidize it by
means of a current of steam or by injecting water; the oxygen and the
steam on issuing from the retort pass together into a condenser; the steam
is condensed and the oxygen passes on to a gasholder in which it is col-
lected. When all the utilizablę, oxygen contained in the binary compound
has been disengaged by the action of the steam the operation of super-
oxidation by means of air is recommenced, and vice versa. The production
of oxygen is continued in this alternate manner as long as may be
required.

page_text: And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim producing
oxygen substantially in the manner herein-before described.
In witness whereof, I, the said Amelia Susannah Brooman, have here-
unto set my hand and seal, this Ninth day of July, One thousand
eight hundred and sixty-six.
A. S. BROOMAN. (L.s.)