AN IMPROVED CUPOLA FOR THE SMELTING OF IRON AND STEEL
Year: 1884

page_text: WILLIAM GLAZE Corbyns Hall n* Dudley Worcestershire Ironmoulder do hereby
declare the nature of my Invention for AN IMPROVED CUPOLA FOR THE SMELTING
OF IRON AND STEEL to be as follows:-
The ordinary cupola's now in use are built the same width from the base to the
top and my Invention consists in making the first four feet from the base, two feet
wider, and then reducing the remaining portion in width.
By these means the twyeres can be placed closer to the bottom of the cupola,
this causes the molten metal to be of greater heat, and two tons of metal, can be
melted, in the same time as an ordinary cupola will melt one ton..
A cupola when constructed on my principles will hold four times as large a
quantity of metal, as an ordinary one and this is a great advantage when casting
heavy gooda.
I also claim that the cupola will melt twice as much metal as an ordinary one,
with one third less fuel, which is a great saving.

page_text: WILLIAM GLAZE, Corbyns Hall, n* Dudley, Worcestershire, Ironmoulder. I do
hereby declare the nature of my Invention for AN IMPROVED CUPOLA FOR THE
SMELTING OF IRON AND STEEL and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement:-
The ordinary cupola's now in use, are built the same width from base to top, and
my improvements, consist in making the lower portion of the cupola wider, for a
certain distance from the bottom, and then dimini-bing the width towards the top,
also in applying the air current or blast near to the bottom of cupola.
The construction of a cupola on my principle is as follow; It is of square shape,
the outside consists of wrought or cast iron plates, which fit into an iron frame,
and are fastened and secured by long screw pins. This iron frame work is lined
with fire bricks, and has the necessary appliances for the conveyance of the air
current to the inside. It can be made any size to suit the wants of the user, but
one capable of melting four or five tons of metal per hour, presents the following
featur. s.
The bottom set of outside plates, are 5 feet wide, and 4 feet high, from the top
of these, the width is diminished, the next set of plates, being 3 feet, 6 inches wide
and 6 feet high, from thence springs. the brick chimney or stack, for the con-
veyance of smoke, gases', &c, and the shape of this can be such as will suit the
place of fixture.
The inside measurements are as follow; From side to side at base the width is
4 feet, and by a gradual taper, this is reduced to 2 feet at a height of 4 feet from
base, the width ti en to top is an uniform one of 2 feet.
:
The tuyeres for conveying the blast, are placed near to the bottom of cupola, being
from 12 to 17 inches from base, and the cupola can be made to work with two or
more tuyeres if necessary, but in the size under notice, two are found sufficient.
By making the bottom of cupola wider the blast or air current has to pass
through a large body of fuel, and this causes a large quantity of carbon to mix
with the metal, which adds greatly to its value for the ordinary purposes of
casting.
Placing the tuyeres near to the bottom of cupola, causes the heat to generate
more rapidly, and the temperature of the molten metal being also raised, it runs
and works freer and smoother, than when melted in an ordinary cupola, and, with
this increased heat, 2 tons of metal can be melted in the same time, as an ordinary
cupola will melt one ton.
The improved cupola will hold four times as large a quantity of metal as the
ordinary ones, and this is a great advantage when casting heavy goods. It will
also melt twice the quantity of metal, with a third less fuel, this being a great
saving.
The great heat attainable in the improved cupola, enables larger pieces of iron to
be melted, than the ordinary ones will hold, and the iron t us melted not having
to be broken up into smaller pieces, causes a saving in labour and material.
The cupola is so constructed that the metal while in a state of fusion, cannot get
to the tuyeres, which therefore keep bright and good this being a very important
matter, for black and burnt tuyeres, soon destroy the lining of a cupola and; this
will cause heavy expense in repairs.
The construction of my cupola is such that repairs are easily effected, and with
great economy.
The Drawings accompanying this Specification are explained as follows.
No. 1. shows inside construction of cupola. 1 and 2 are holes left in outside
plates and brick work for the admission of tuveres for blast pipes,

page_text: No. II. shows front of cupola and blast pipes. 1 and 2 are pipes for conveyance
of blast or air. 3. is iron door kept in place by iron bar 6. 6.
4 is hole in outside plate for effecting repairs to inside.
5 is tapping hole for the release of molten metal.
7.7 screw pin fastening sides together.
Having now particularly described the nature of my said Invention and in what
manner the same is performed, I declare that what I claim is,
1 The construction of a cupola, having the lower portion widened out, as
above described.
2nd The placing of the tuyeres for the admission of the air current nearer to the
bottom of cupola.