Турпокритито ти AND CONNECTED WITH PUDDLING FURNACES
Year: 1872

page_text: LETTERS PATENT to James Fredric Stewart and Henry Defty, both
of Middlesbrough, in the County of York, for the Invention of
66 Турпокритито ти AND
CONNECTED WITH PUDDLING FURNACES."
Sealed the 24th December 1872, and dated the 4th July 1872.
PROVISIONAL SPECIFICATION left by the said James Fredric Stewart
and Henry Defty at the Office of the Commissioners of Patents,
with their Petition, on the 4th July 1872.
We, JAMES FREDRIC STEWART and HENRY DEFTY, both of Middles-
brough, in the County of York, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN AND CONNECTED WITH PUDDLING
FURNACES," to be as follows:
:-
Our Invention consists of improvements in and connected with
puddling furnaces.
At each side of a furnace or fire-place supplied with coal, coke, or other
fuel, we place a decarbonizing or puddling chamber, and at the back of
the said furnace we place another similar chamber, the three chambers
being thus as it were situated at the three corners of a triangle. The

page_text: furnaces and chambers are surrounded with fire-brick, and from the
furnace three flues lead, one over cach chamber. These three flues extend
beyond the chambers, and are then carried up to one central flue sur-
rounding a boiler which is supported upon a girder or bracket mounted
on the furnace. The furnace bars are hollow and perforated, and are
connected to a blast pipe, so that blasts of air are driven into the
furnace.
The decarbonizing chambers are caused to revolve by gearing which,
as well as the blast fan, is driven by an engine deriving its steam from
the boiler before named. The decarbonizing chambers are lined with
prepared pulverous material or fettling, and are provided with slide doors
at the back.
There are dampers where the three flues before mentioned com-
municate with the central flue, and there are also dampers between the
furnace and the decarbonizing chambers.
The important features in our Invention are the heating of several
puddling or decarbonizing chambers from onc fire, as described;
arranging the said chambers, as described; the placing of the boiler, as
described, so as to furnish steam for working the blast fan and gearing,
and the tubular fire-bars, as described.
4
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Fredric Stewart and Henry Defty in the
Great Seal Patent Office on the 2nd January 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
FREDRIC STEWART and HENRY DEFTY, both of Middlesborough, in the
County of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of July, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors give
and grant unto us, the said James Fredric Stewart and Henry Defty, Her
special licence that we, the said James Fredric Stewart and Henry Defty,
our executors, administrators, and assigns, or such others as we, the said

page_text: There are dampers where the three flues before mentioned com-
municate with the central flue, and there are also dampers between the
furnace and the decarbonizing chambers.
The important features in our Invention are the heating of several
puddling or decarbonizing chambers from one fire, as described;
arranging the said chambers, as described; the placing of the boiler, as
described, so as to furnish steam for working the blast fan and gearing,
and the tubular fire-bars, as described.
Having thus briefly described our Invention, we will now proceed to
explain the same more particularly, reference being had at the accom-
panying Drawings, in which Fig. I. is an outside longitudinal view;
Fig. II., a longitudinal section; Fig. III., a transverse section; and
Fig. IV., an end view of a furnace constructed according our
Invention.
This furnace in question, which is mounted upon a bogic A, so as the
whole arrangement is available, it being a furnace fire B, similar to that
of a puddling furnace, four feet square, furnished with arrangement such
as blast steam injectors, together with an escape tube C to pass off the
gases during prepared fire or repairs; the fire obtains what air it
requires through tube grate bars D, extending the full length of ash-
hole E, thereby heating the air to 103 dg and cooling the bars, the ash-
hole E furnished with closed doors F thereby facilitating the passage of
the air through the tube bars. The flame then passes over a bridge G,
adjoining which stands a prepared lined portable ingot or revolving
dish H, over which stands a 8 inch square by 3 × 6 long hammer I,
incased and suspended from a lever J, so as that can be brought to bear
upon the mass in the ingot or revolving dish or dishes inclosed by folding
or slide doors K. The ingots or dishes are placed immediately under-
neath the bell end L of an incline revolving chamber M, which rests
upon two longitudinal girders N, extending to cupola O, which is fur-
nished with rollers P and shaft Q, to revolve the chamber for puddling,
refining iron, or granulating slags. For iron a dense flame is passed up,
and into which the iron is being regularly admitted, and undergoing in a
spiral form the necessary decarbonizing, sulphur, and phosphorising
process, the lining of the chamber being of a special preparation, and
upheld by a continuous supply of the same material in a powdered state,
and admitted into the chamber at each end by small hoppers R.
The

page_text: flame ascending from the chamber to where the cupola tuyere is placed
is then passed into the cupola with the blast where the metal is being
prepared, and passed by means of a runner S into the chamber under-
neath the bottom of a door T, which is the full area of the chamber, the
metal being properly skimmed in its course to the chamber, which can
be raised or lowered as required for refining, puddling, or granulating
slags, the cupola being charged at the top through a proper self-acting
door U, immediately over which stands a tube boiler V generating steam
for the efficient working of the whole arrangement, utilizing the whole
of the heat by this arrangement, and distributing the iron in particles to
the benefit of the lining and action of the fire, so as when the heat is
once up it is retained with a light expense of fuel.
Having thus described the nature of our said Invention and in what
manner the same is to be carried into effect, we declare that we do not
intend to confine ourselves to precise details hercin-before stated, which
may be modified without departing from our Invention; but what we
claim and desire to secure by the said Royal Letters Patent is, a puddling
furnace furnished with one fire-place heating several puddling or
decarbonizing chambers, and with a steam boiler, as above described and
represented in the annexed Drawings.
In witness whereof, we, the said James Fredric Stewart and the
said Henry Defty, have hereunto set our hand and scal, this First
day of January One thousand eight hundred and seventy-three.
J. F. STEWART.
(L.S.)
HENRY DEFTY. (L.S.)