IMPROVEMENTS IN THE MANUFACTURE OF PRUSSIATE OF POTASH AND PRUSSIATE OF SODA, AND IN THE MEANS EMPLOYED FOR COLLECTING AND UTILIZING THE GASES AND PROVISIONAL SPECIFICATION
Year: 1874

page_text: LETTERS PATENT to Samuel Nield and Benjamin Foster, both of
Leeds, in the County of York, for the Invention of "IMPROVEMENTS
IN THE MANUFACTURE OF PRUSSIATE OF POTASH AND PRUSSIATE OF SODA, AND
IN THE MEANS EMPLOYED FOR COLLECTING AND UTILIZING THE GASES AND
PROVISIONAL SPECIFICATION left by the said Samuel Nield and
Benjamin Foster at the Office of the Commissioners of Patents, with
their Petition, on the 27th July 1874.
We, SAMUEL NIELD and BENJAMIN FOSTER, both of Leeds, in the
County of York, do hereby declare the nature of the said Invention for
IMPROVEMENTS IN THE MANUFACTURE OF PRUSSIATE OF POTASH AND PRUSSIATE
OF SODA, AND IN THE MEANS EMPLOYED FOR COLLECTING AND UTILIZING THE GASES
AND OTHER SUBSTANCES EMITTED IN THE MANUFACTURE THEREOF,” to bo as
follows:-
Hitherto a great loss has been sustained by the manufacturer of
prussiate of potash and prussiate of soda on account of the amount of
animal matter in combination with useful gases passing off into the.
atmosphere, and being wasted,

page_text: The object of our Invention is to collect and use the animal and other
matters, also to utilize the gases for illuminating, heating, and other
purposes.
The materials used are of a similar description to those usually
employed in the manufacture of prussiate of potash or prussiate of soda. 5
These materials are placed in an iron retort, and burnt in the ordinary
way.
The gases, animal, and other mattors, which have hitherto passed into
the air, are conducted or drawn by suitable means through suitable pipes
or flues, and conveyed thereby into a receiver or receivers containing 1
liquor." This liquor may consist of a solution of alkali, acid, puro
water, or their equivalents.
66
When the gases are passed through the liquor a deposit is left, which
consists partly of animal colouring matter and potash.
After the animal matter and potash have been deposited they are taken 1
out and used again. The colouring matter which is also deposited may
be employed for dyeing or other purposes.
When preferred the gases may be drawn or conducted from the retort,
and conveyed direct to any required place, and employed for illuminating,
heating on other nummosos
6
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Nield and Benjamin Foster in the Great
Seal Patent Office on the 27th January 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, SAMUEL
NIELD and BENJAMIN FOSTER, both of Leeds, in the County of York, 2
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of July, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her beirs and 8
successors, give and grant unto us, the said Samuel Nield and
Benjamin Foster, Her special licence that we, the said Samuel Nield.

page_text: and Benjamin Foster, our executors, administrators, and assigns,
or such others as we, the said Samuel Nield and Benjamin Foster,
our executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 In-
vention for "IMPROVEMENTS IN THE MANUFACTURE OF PRUSSIATE OF POTASH
AND PRUSSIATE OF SODA, AND IN THE MEANS. EMPLOYED. FOR COLLECTING AND
UTILIZING THE GASES AND OTHER SUBSTANCES EMITTED IN THE MANUFACTURE
THEREOF," upon thc condition (amongst others) that wo, the said Samuel
Nield and Benjamin Foster, our' executors or administrators, by an
instrument in writing under our, or their, or one of their lands and
seals, should particularly describo 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 tho Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
|: Patent.
144
17
"
NOW KNOW YE, that we, the said Samuel Nield and Benjamin
O Foster, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed; to be particularly described
and ascertained in and by the following statement in writing, and on
reference being had to the accompanying Sheet of Drawings forming a
part of this Specification:-
Hitherto a great loss has been sustained by the manufacturer of
prussiato of potash and prussiate of soda on account of the amount of
animal matter in combination with useful gases passing off into the
atmosphere, and being wasted.
The object of our Invention is to collect and use the animal and other
O matters, also to utilize the gases for illuminating, heating, and other
purposes.
The materials used are of a similar description to those.. usually
employed in the manufacture of prussiato of potash or prussiate of soda..
These materials are placed in an iron retort, and burnt in the ordinary
5 way.
The gases, animal, and other matters which have hitherto passed into
had no denumn be suitable means through suitable nines.
1-11

page_text: or flucs, and conveyed thereby into a receiver or receivers containing
"liquor." This "liquor" may consist of a solution of alkali, acid,
pure water, or their equivalents.
When the gases are passed through the liquor a deposit is left,
which consists partly of animal coloring matter and potash,
⚫ After the animal matter and potash have been deposited they are.
taken out and used again. The coloring matter which is also deposited
may be employed for dyeing or other purposes.
When preferred the gases may be drawn or conducted from the retort,
and conveyed direct to any required place, and employed for illumi- 1
nating, heating, or other purposes.
In order that our Invention may be more completely understood
reference is given to tho accompanying Sheet of Drawings.
Figure 1 is a front clevation; Figure 2, a side clevation; and Figuro 3,
is a plan looking on top.
.1
a is a retort; b is the furnace for heating tlie same; these are of
ordinary construction. The gases which arise from the rags and. other
materials burnt in the retort a arc drawn or conducted from the retort a
through the tube, pipe, or flue c, conveyed direct to any required place,
and employed for illuminating, heating, or other purposes. After the 2
gas has been withdrawn from the retort a by means of a fan or its
equivalent we employ it again as hereafter described in the manufacturo
of prussiate of potash or prussiate of soda, as shown in our Drawings..
The gases which have hitherto passed off as waste arc, after being drawn.
through the tube, pipe, or flue c, carried back to the retort a through 2
the tube, pipe, or fluc d, and thrown into the retort a through tho
connecting tube or pipe e on to the burning material employed for the
manufacture of prussiate of potash or prussiate of soda. On being
thrown into the retort a ignition immediately takes place, which causes
additional heat in the retort a, and helps to fuse the potash. A quantity 3
of common air is taken up with the gases from the retorts. We mount
the tube or pipe c on the hinge c' for the purpose of readily removing it
out of the way when the lid a' is required to be taken off.
Instead of conducting the gas into the retort a when preferred wo
pass it into the furnace 6, and convey it thereto from the main tube, 3

page_text: pipe, or flue by means of the smaller pipe or tube g. The gas ignites
on being thrown on the fire in the furnace 6, causing additional heat
for fusing purposes, thereby economizing fuel:
The gases, animal, and other matters (which have hitherto passed off
in the air, and wasted) after being drawn away from the retort a, as
herein-before described, may be conveyed through suitable pipes or
tubes into a receiver or receivers containing "liquor." This" liquor
may consist of alkali, acid, pure water, or their equivalents.
"
When the gases are passed through this " liquor" a deposit is left,
which consists of animal coloring matter and potash. Whatever potash
is deposited is taken out and used again.
The coloring matter is also deposited, such as sulphate or muriate of
ammonia, which may be employed for dyeing or other purposes.
Having now described the nature of our said Invention, and the
manner in which the same is to be performed, we do not limit ourselves
to the exact limits, details, and configuration of the parts wo have
explained and shown, as the same may of course be varied or modified
without in any way doparting from our Invention; but what we do
claim and desire to be secured to us by Letters Patent is,—
.
Firstly. The arrangement, construction, and combination of the
various parts.herein explained and shown for collecting the animal and
other matter, substantially as and for the purposes herein set forth.
Secondly. The means or apparatus employed for utilizing the wasto
gases emitted in the manufacture of prussiate of potash or prussiate of
soda, substantially as and for the purposes herein set forth.
In witness whercof, we, the said Samuel Nield and Benjamin
Foster, have hereunto set our hands and seals, this Twenty-
sixth day of January, in the year of our Lord One thousand
eight hundred and seventy-five.