IMPROVEMENTS IN FURNACES FOR HEATING IRON OR FOR OTHER PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I WILLIAM FARNWORTH of Swindon near Dudley Staffordshire Ironworks
Manager do hereby declare the nature of said Invention for "IMPROVEMENTS IN
FURNACES FOR HEATING IRON OR FOR OTHER PURPOSES" to be as follows:-
This Invention has reference to furnaces in which the gases from the fuel
employed are caused to come into contact with heated air to effect the combustion
of the said gases. According to iny said Invention I provide means whereby
heated air is admitted through a number of passages to meet the gases from below,
above and the sides and rear of the passage or chamber through which the gases
pass from the fuel chamber either before they pass over the bridge or after they
have passed over the bridge. I also admit heated air at a port in the upper portion
of the fuel chamber opposite or about opposite the opening over the bridge. The
arrangements by which those air admittances are effected consist of flues or passages
led preferably through the length of the furnace being admitted at the end
opposite the fire place and passing thence under or in proximity to the sole of the
working chamber of the furnace. The air is admitted or forced by a jet into
passages pipes or flues and thence into the passages pipes or flues under or in
proximity to the working chamber of the furnace. These flues lead into or consist
of a number of branch or radiating flues leading respectively to the passages and
openings for the discharge of the heated air to meet the gases so that the said nir
is delivered from below from above and from the sides and rear of the passage or
chamber through which the gases pass to the bridge or the passage or chamber
through which the gases pass after they have gone over the bridge the air
delivery openings are preferably small and in large number so as to thoroughly
incorporate the air and gases.
The openings through which tools are inserted for cleaning the sides or bars of.
the furnace from clinker are made of a trumpet like form furnished with a motal
lining into which the closing plugs are inserted.
A

page_text: COMELI SEMUITION
I WILLIAM FARNWORTH of Swindon near Dudley Staffordshire Ironworks
Manager do hereby declare the nature of said invention for "IMPROVEMENTS IN
FURNACES FOR HEATING IRON OR FOR OTHER PURPOSES" and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:—
This Invention has reference to puddling and Heating furnaces and furnaces for
other purposes such for example as for generating steam in which the gases from
the fuel employed are caused to come into contact with heated air to effect the
combustion of the said gases-According to my said Invention I provide means
whereby heated air is admitted through a number of passages to meet the gases
from below, from above and from the rear or the sides and rear of the passage or
Chamber through which the gases pass from the fuel Chamber, cither before they
pass over the bridge, or after they have passed over the bridge, I also adınit heated
air at a part immediately over the outlet from the fuel Chamber or gas generator,
opposite or about opposite the opening over the ledge, and also at the rear and
sides through perforated Bricks The arrangements by which these air adınittances
are effected consist of flues or passages led preferably through the length of tho
furnace the said air being heated by the spent heat of the furnace and being
admitted at the end opposite the fire place and passing thence under or in proximity
to the sole of the working chamber of the furnace or the air may be admitted by
pipes or passages at the side of the gas generator to meet the gases as aforesaid.
The air may be admitted or forced by a jet into passages pipes or flues and thence
into the passages pipes or flues under or in proximity to the working chamber, or
the gas producing chamber of the furnace-These flues lead into or consist of a
number of branch or radiating flues leading respectively to the passages and
openings for the discharge of the heated air to meet the gases so that the said air
is delivered from below, from above, and from the sides, and rear, of the passage, or
chamber through which the gases pass to the bridge or the passage or chamber
through which the gases pass after they have gone over the bridge, the air delivery
openings are preferably sinall and in large number so as to thoroughly incorporate
the air and gases but where desirable one large or continuous opening may be
provided instead of the small passages.
The openings through which tools are inserted for cleaning the sides or bars of
the furnace from clinker are made of a trumpet like, or inwardly widening out
lining, into which the closing plugs aro inserted.
And in order that my said Invention may be fully understood 1 shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawing the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 is a longitudinal section of a furnace constructed or arranged according
to my Invention. A is the gas producer which is fed with slack, or coal, from the
hopper A¹ and the gases from the coal pass from the grate over a hot plate a and

page_text: thence through a number of passages or perforations b preferably small in size and
in large numbers in a structure B erected at the bridge C, Air may be forced in
between the fire bars from below by means of a steam jet B' for the purpose of
regulating the production of gas by the use of which jet an inferior description of
fuel than is usual may be employed for producing high temperatures. Air to meet
the gases as they pass to the bridge is admitted at D through the pipes & into a
flue or passage E and by side passages F into the space G and thence it passes
through perforations or passages 62 in the said structure B to mix with and effect
the combustion of the gases from the Chamber.
The Heating products from the working chamber H on their road to the chimney
pass around the pipes d and heat the air supply. The air in addition to being
admitted through the perforations 62 may be admitted to meet the gases from above
by a passage as at i and also to meet the gases from below by a passage j and if
desired the air may also be admitted from the passages F by perforations in the
sides thereof so as to impinge upon the gases from the side. The hot plate a gives
a heating surface for assisting in heating the air In place of or in addition to
admitting the air to the side passages F as described, the air may be admitted by a
pipe or pipes or passage or passages in the sides of the chamber A as shewn at K.
Doors are provided at suitable places to give access to the parts of the furnace as
desired, for example there may be in addition to the ordinary doors a door or doors
at the sides of the furnace by which access can be gained to the structure B and its
perforations, and there may also be a door or doors for a similar purpose in the
walling. There may also be doors for gaining access to any of the air or gas
passages as required and one can be conveniently made in the front end of the
furnace as shown at a² so that a cleaning tool can be introduced to clean the plate a
The structure B may be situated forward of the bridge of the furnace but I prefer
to arrange it in the position illustrated. The openings through which tools are
inserted for cleaning the sides or bars of the furnace from clinker are preferably
made of a trumpet form or splayed out, from the outside towards the inside of the
furnace. This is effected by providing metal linings as shewn on an enlarged
scale in Figures 2 and 3.
Figure 2 shewing a lining of a shape suitable for the openings I by which the
fire bars are cleaned and figure 3 shewing one suitable for the openings M through
which the walls and sides of the furnace are cleaned.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
First: The construction of furnaces of the class hereinbefore referred to with
passages for the admission and heating of air for its subsequent admixtures with
the gases from the producer or furnace substantially as hereinbefore described.
Second-The use with the openings in furnaces for allowing of the introduction
of cleaning tools, of linings splayed out or of trumpet mouth form, the wider part
being inwards substantially as hereinbefore described and illustrated in Figures 2
and 3 of the accompanying Drawings.