IMPROVEMENTS IN FURNACES USED IN PUDDLING, MELTING, OR HEATING IRON OR OTHER METALS." PROAL SPECIFICATION
Year: 1878

page_text: LETTERS PATENT to Daniel Richard Caddick, of Middlesborough, in the County
of York, Engineer, and Thomas Lewis, of Stockton-on-Tees, in the County of
Durham, Manager, for the Invention of "IMPROVEMENTS IN FURNACES USED
IN PUDDLING, MELTING, OR HEATING IRON OR OTHER METALS."
PROVISIONAL SPECIFICATION left by the said Daniel Richard Caddick and
Thomas Lewis at the Office of the Commissioners of Patents on the 2nd March
1878.
DANIEL RICHARD CADDICK, of Middlesborough, in the County of York, Engineer,
and THOMAS LEWIS, of Stockton-on-Tees, in the County of Durham, Manager.
"IMPROVEMENTS IN FURNACES USED IN PUDDLING, MELTING, OR HEATING IRON
OR OTHER METALS."
The object of the Invention is to facilitate the heating of the blast employed in
aid of the combustion of fuel in the combustion chamber of furnaces used in
puddling, melting, or heating iron or other metals, and also to facilitate the
combustion of the smoke and products of combustion from such combustion of
fuel.
In carrying our Invention into effect the bottom of the chamber of the furnace
in which the puddling or other operation upon the metal is carried on is formed
double or as a box, and is divided into a series of compartments or channels which
communicate with each other, but so that whilst one compartment or channel
cominunicates with the next at one end thereof that next channel communicates
with the third at the opposite end, and so on alternately, according to the number
of divisions employed, so that the air driveu into the first by a blower or by other
suitable means is conducted in succession through these parallel chambers and
becomes increasingly heated by the heat of the bottom of the furnace until it is
allowed to escape into a closed ash-pit under the fire-bars to pass up between those
bars and act on the fuel and aid its combustion in the combustion chamber; part of

page_text: this heated air also passes into chambers acting as clinker boxes at the sides of the
combustion chamber to aid in keeping such boxes cool, whilst these boxes prevent
the clinkering of the fuel to the brick sides of such combustion chamber. These
boxes also become reservoirs of highly heated air, which is thence conducted by
suitable pipes or passages at the end and sides of the furnace to act on the smoke
and products of combustion from the fuel in the combustion chambers.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Daniel Richard Caddick and Thomas Lewis in the Great Seal Patent
Office on the 30th August 1878.
DANIEL RICHARD CADDICK, of Middlesborough, in the County of York, Engineer,
and THOMAS LEWIS, of Stockton-on-Tees, in the County of Durham, Manager.
IMPROVEMENTS IN FURNACES USED IN PUDDLING, MELTING, OR HEATING IRON.
OR OTHER METALS."
"
The object of the Invention is to facilitate the heating of the blast employed in
aid of the combustion of fuel in the combustion chamber of furnaces used in
puddling, melting, or heating iron or other metals, and also to facilitate the
combustion from such combustion of fuel.
But that the Invention may be the better understood, we will, by the aid of the
accompanying Drawings, proceed to describe means pursued by us in carrying the
same into effect.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows an external side view; Figure 2, an end view; Figure 3, a
longitudinal section; Figures 4 and 5, two sectional plan views; and Figure 6, a
transverse sectional view of an arrangement of furnace arranged according to our
Invention.
In each of these views the same letters are employed to indicate corresponding
parts.
a is the combustion chamber, and 6 the chamber in which the puddling or other
operation upon the metal is carried on; and c is the ash-pit under the combustion
chamber a.
In carrying our Invention into effect the bottom d of the furnace chamber 6, in
which the puddling or other operation is carried on, is formed double or as a box d¹,
and this box is divided into two or more compartments.
As shown, there are two compartments d' formed by the wall or division d²
between them, and there is an opening d³ at each side of this box d', one communi-
cating with each compartment thereof capable of serving as escape pipes to aid in
keeping the bottom d cool when the air is not required to pass into the ash-pit c.
These pipes are capable of being closed when desired; and there is also a passage
from each compartment d' through openings d* to the ash-pit c. By these means,
according to the arrangement shown, air to the chambers & may be supplied from
any suitable blower through feed pipes e, e, to the chambers d¹, d, and after
circulating through those chambers d', d', it may pass through the passages d³, d*,

page_text: into the ash-pit c which is closed, so that the air supplied thereto may be controlled
to pass up between the fire-bars f to the fuel in the combustion chamber a.
The passages d*, d, are capable of being closed when required.
Passages are also provided capable of being closed, or of communicating with the
chamber g in the fire-bridge for the circulation of air,therein to aid in keeping that
bridge cool.
If desired, the box or bottom d may be divided into a series of compartments or
channels communicating one with another, so that whilst one compartment or
channel communicates with the next at one end thereof that next channel communi-
cates with the third at the opposite end, and so on alternately, according to the
number of divisions employed, so that the air driven into the first channel or
compartment by a blower or by other suitable means may be conducted in succession
through the series of such parallel chambers, and thereby becomes increasingly
heated by the heat of the bottom of the furnace until it is allowed to escape into
the enclosed ash-pit c. Part of the heated air from the ash-pit may, if desired, also
pass into chambers placed at the sides of the combustion chamber, and to act as
clinker boxes to prevent clinkering of the fuel to the brick sides of such combustion
chambers. These boxes may also be used as reservoirs of highly heated air, which
is then conducted by suitable pipes or passages at the end and sides of the furnace
to act on the smoke and products of combustion from the fuel in the combustion
chamber.
Having thus described our Invention and means which we adopt in carrying the
same into effect, we would have it understood that what we claim is, the arranging
or combining parts of furnaces used in puddling, melting, or heating iron or other
metals, whereby the blast employed in aid of the combustion of fuel in the
combustion chamber used in such processes may be heated, and the parts of the
furnace are cooled as described.
In witness whereof, I, the said Daniel Richard Caddick, hereunto set my hand
and seal, this 24th day of August, in the year of our Lord One thousand
eight hundred and seventy-eight.
D. R. CADDICK. (L.S.)