IMPROVEMENTS IN COLLECTING THE HEATED. GASES PROM BLAST FURNACES 80 AS TO UTILISE THE SAME." PROVISIONAL SPECIFICATION
Year: 1866

page_text: LETTERS PATENT to James Sparrow and Samuel Poole, both of Frood
Ironworks, near Wrexham, in the County of Denbigh, Ironmasters,
for the Invention of "IMPROVEMENTS IN COLLECTING THE HEATED. GASES
PROM BLAST FURNACES 80 AS TO UTILISE THE SAME."
PROVISIONAL SPECIFICATION left by the said James. Sparrow and Samuel
Poole at the Office of the Commissioners of Patents, with their Petition,
on the 10th April 1866.
We, JAMES SPARROW and SAMUEL POOLE, both of Frood Ironworks,.
near Wrexham, in the County of Denbigh, Iron Masters, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN COLLECTING THE HEATED
GASES FROM BLAST FURNACES SO AS TO UTILISE THE SAME," to be as follows (that
is to say):-
This Invention has for its object certain improvements and arrangement of
apparatus for collecting and utilising heated gases thrown off from blast
furnaces, and by one modification of the Invention the improvements may be
applied to furnaces whilst in blast, in which case the apparatus is so con-
structed and arranged that the major part thereof is applicable when it is
necessary to reconstruct the furnace or take down the tunnel head and neck
of the furnace.

page_text: To apply this Invention to, say, a furnace out of blast, we construct a curve
chamber, by preference of boiler plate, the inner external side of which inter-
nally coincides and may be in immediate contact with the exterior vertical
surface of the tunnel head above the feed openings, and which chamber may
be rectangular in vertical section or of any other convenient form. This
curved chamber encompasses, say, about six-sevenths of the exterior of the
tunnel head, and is closed at each end, where it is provided with doors or port
openings for convenience of admission into the curved chamber for the con-
venience of cleaning and repairing the same. The bottom of the curved
chamber is provided with rectangular vertical tubes or passages, one between
each feed opening or filling hole, which open into the bottom of the rectan-
gular chamber and extend downwards through the foot plates of the feeding
stage and the brickwork of the neck of the furnace so as to extend about six
feet below the charge, where they open out through the side of the furnace,
the lower ends being constructed with lateral funnel-shaped mouths. Thus it
will be seen that if there are five feed openings or mouths in the neck of the
furnace there will be five of these vertical pendant pipes, which form so many
passages for the heated gases from the furnace to the curved chamber, which
is of an area equal to, say, about two of the vertical passages, as this will be
found sufficient, for as the centre passage will open out into the curved
chamber immediately in front of a lateral chamber formed on the side of
the centre of curved chamber, and which lateral chamber is fitted on the
under side with a large pipe or passage which extends downwards, and by
which the heated gases are carried to the steam boiler or other position where
it is desired to utilise the waste heat carried off from the blast furnace by the
apparatus. In this modification of the Invention it is preferred to form the
vertical passages and curved chamber with its lateral chamber from boiler
plates.
To apply this Invention to a furnace in blast, in place of using the vertical
rectangular boiler plate tubes passing through the brickwork of the neck of
the furnace, cast-iron pipes or tubes are used which extend a little way below
the curved chamber and then turn off in an horizontal curved direction,
passing through the brickwork of the tunnel head at points above the feed
openings, and thence vertically down the side of the exterior of the furnace to,
say, about six feet below the charge. When the lower end of the tubes
are burnt or become unserviceable all that is required is simply to unbolt them
at their flanges below the curved chamber and allow them to fall into the
furnace, when the metal will be recovered with the charge and new ones may
be conveniently applied without blowing out the furnace.

page_text: If preferred the pipes or passages and the curved chamber may be of any
other convenient form in section, as well as rectangular, and may be formed of
cast iron or other suitable material.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Sparrow and Samuel Poole in the Great Seal Patent
Office on the 10th October 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
SPARROW and SAMUEL POOLE, both of Frood Ironworks, near Wrexham, in
the County of Denbigh, Ironmasters, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of April, 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
us, the said James Sparrow and Samuel Poole, Her special licence that
we, the said James Sparrow and Samuel Poole, our executors, adminis.
trators, and assigns, or such others as we, the said James Sparrow and
Samuel Poole, 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 Invention for "IMPROVE.
MENTS IN COLLECTING THE HEATED GASES FROM BLAST FURNACES SO AS TO UTILISE
THE SAME," upon the condition (amongst others) that we, the said James
Sparrow and Samuel Poole, our executors or administrators, by an instru
ment in writing under our, 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 we, the said James Sparrow and Samuel Poole
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 (that is to say) :-
This our said Invention has for its object certain improvements and
arrangement of apparatus for collecting and utilising heated gases thrown off
from blast furnaces, and by one modification of our Invention the improve-

page_text: ments may be applied to furnaces whilst in blast, in which case the apparatus
is so constructed and arranged that the major part thereof is applicable when
it is necessary to reconstruct the furnace or take down the tunnel head and
neck of the furnace.
To apply this our said Invention to, say, a furnace out of blast, we construct
a curved chamber, by preference of boiler plate, the inner external side of
which internally coincides and may be in immediate contact with the exterior
vertical surface of the tunnel head above the feed openings, and which chamber
may be rectangular in vertical section or of any other convenient form. This
curved chamber encompasses, say, about six-sevenths of the exterior of the
tunnel head, and is closed at each end, where it is provided with doors or
.port openings for convenience of admission into the curved chamber for the
convenience of cleaning and repairing the same. The bottom of the curved
chamber is provided with rectangular vertical tubes or passages, one between
each 'feed opening or filling hole, which open into the bottom of the rectan-
gular chamber and extend downwards through the foot plates of the feeding
stage and the brickwork of the neck of the furnace so as to extend about six
feet below the charge where they open out through the side of the furnace, the
lower ends being constructed with lateral funnel-shaped mouths. Thus it
will be seen that if there are five feed openings or mouths in the neck of the
furnace there will be five of these vertical pendant pipes, which form so many
passages for the heated gases from the furnace to the curved chamber, which
is of an area equal to, say, about two of the vertical passages, as this will be
found sufficient, for as the centre passage will open out into the curved
chamber formed on the side of the centre of the curved chamber, and which
lateral chamber is fitted on the under side with a large pipe or passage which
extends downwards, and by which the heated gases are carried to the steam
*boiler or other position where it is desired to utilise the waste heat carried off
from the blast furnace by the apparatus. In this modification of our Inven-
tion it is preferred to form the vertical passages and curved chamber with its
lateral chamber from boiler plates.
To apply this our said Invention to a furnace in blast in place of using the
vertical rectangular boiler plate tubes passing through the brick work of the
neck of the furnace cast-iron pipes or tubes are used which extend a little
way below the curved chamber and then turn off in an horizontal curved
direction, passing through the brickwork of the tunnel head at points above the
'feed openings, and thence vertically down the side of the interior of the furnace
to, say, about six feet below the charge. When the lower end of these tubes
are burnt or become unserviceable all' that is required is simply to unbolt them
.

page_text: at their flanges below the curved chamber and allow them to fall into the
furnace, when the metal will be recovered with the charge and new ones may
be conveniently applied without out the furnace.
If preferred, the pipes or passages and the curved chamber may be of any
other convenient form in section as well as rectangular, and may be formed of
cast iron or other suitable material.
That this our said Invention may be the more readily seen and understood,
we have hereunto annexed Drawings of so much of the head of a blast furnace
as will be necessary to practically illustrate the nature of the Invention on a
scale of a quarter of an inch to one foot, like letters and figures marked thereon
being used to denote similar parts.
Figure 1 is a side elevation of the head of a blast furnace showing our
Invention applied thereto, and Figure 2 is a top view or plan of the same;
Figure 3 is a sectional elevation of the same, and Figure 4 is an horizontal
section taken from a to 6 (Figure 3),
A, external brickwork of furnace; B, internal lining of fire-brick; C, foot
plates; D, feed openings or filling holes, which in this modification are five in
number; E, vertical pipes, which also in this modification are five in
number, which convey the heated gases into F the curved chamber, from
whence they pass into G a vertical pendant pipe by which the heated gases
are conveyed to the steam boiler or other position where they are intended to
be utilised; H, a balance damper fitted to the pendant pipe G; J, dampers
fitted to the pipes E, for regulating and controlling the gases passing there-
through.
Having now fully described and ascertained the nature of this our said
Invention, and the best means we are acquainted with for carrying the same
into practical effect, we wish it to be understood that we do not confine
ourselves to the precise details, relative proportions, or dimensions herein-
before described, set forth, and illustrated in the annexed Drawings, as it will
be readily seen that the same may be considerably varied without departing
from the Invention; but what we claim is,-
First, the application of the tubes E opening into the interior of the furnace,
substantially in the manner and for the purposes herein-before described and
set forth.
Secondly, the application of the curved chamber F with its pendant pipe G
for receiving and conveying the heated gases from blast furnaces, substantially
in the manner and for the purposes herein-before described and set forth.
And, lastly, the general arrangement and combination of the several parts
of the apparatus herein-before described and set forth as applied to blast

page_text: furnaces for the collection and utilisation of what is now the waste heat
thrown off from blast furnaces, as herein-before described, set forth, and
illustrated.
In witness whereof, we, the said James Sparrow and Samuel Poole,
have hereunto set our hands and affixed our seals, this Ninth day
of October, in the year of our Lord One thousand eight hundred
and sixty-six.
Witness,
WILLIAM WALKER,
Of 44, Castle Street,
Liverpool.
SAMUEL (LS.) POOLE.
JAMES (L.s.) SPARROW.