IMPROVEMENTS IN FURNACES
Year: 1884

page_text: I SYDNEY HENRY KNOTT of 8 Mawbey Road Old Kent Road in the county of
Surrey Glass bottle Manufacturer do hereby declare the nature of my said
Invention for IMPROVEMENTS IN FURNACES "
to be as follows:-
16
This Invention relates to certain improvements in furnaces for use in glass
making particularly, the object being to increase the heat and to avoid the necessity
of using crucibles.
The Invention is carried out as follows:-
A brick tank or reservoir (of shape and size according to the quantity of glass
required to be melted) is lined with fire clay lumps, and a Fire box or furnace
chamber is furnished at each end, provided with door or doors, in position as may
be most convenient for feeding the furnaces with fuel. Over each end above the
furnace chambers, a crown or arch is built having one or more holes or flues
therein, as may be required to allow of the fine grit and dirt arising from feeding
the furnaces, or from sudden draughts; passing through, so that the grit and dirt
shall not mix with the liquid glass. An arch joining the arches over the furnaces
is also constructed over the melting tank or reservoir itself, in which arch there are
also a number of piercings or openings to allow of the heat passing off to the shafts.
Over the whole of the described construction is built another arch allowing such a
space between them as may be found convenient for purposes of cleaning the flues,
and there are provided three shafts, one being situate over each of the furnace
chambers, and one of larger size over the centre of the melting tank, reservoir or
chamber;
each shaft being provided with dampers for regulating the draughts.
The shafts over the fire chambers are particularly for the purpose of drawing off the
dirt and grit from the furnace fires whilst feeding with fuel, or that may arise from
sudden draughts, whilst they also serve to increase the draught and give instensity
to the furnaces.
In the sides of the reservoir there are a number of working holes according to
the size of reservoir, through which the glass can be drawn as required.
In feeding or replenishing say the first furnace, the damper in the first
corresponding shaft would be open and those in shafts two and three would be
closed, by which the dust or grit from the first furnace chamber that is being
replenished would be drawn through the openings in the crown of the arch into
minn 71

page_text: the said first shaft instead of over the fire bridge across and onto the molten glass
contained in the reservoir.
In feeding the second furnace, the operation is simply reversed, that is, the
damper in the second shaft would be opened and the others would be closed. In
this way the dust arising from the furnace being tended or replenished is, by reason
of all the draught being directed to its chimney carried directly away without
passing over the melting tank and the surface of the molten metal is kept clean for
working without stoppage.
To regulate the draught so that both fires may be burning with the same
intensity, the dampers may be opened or closed as required.
This construction of furnace may be employed in other than glass manufacture
when it is required to keep a mass of molten material upon a sole or hearth or in a
melting tank, free from dust, dirt and products of combustion.
Dis Ok dass of Tuner 1884
WALTER A. BARLOW,
G, St. Paul's Churchyard,
London, E.C.

page_text: I SIDNEY HENRY KNOTT of 8 Mawbey Road, Old Kent Road in the county of
Surrey, Glass Bottle Manufacturer do hereby declare the nature of my said
invention for "IMPROVEMENTS IN FURNACES" and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement
This invention relates to certain improvements in furnaces for use in glass
making particularly, the object being to increase the heat and to avoid the necessity
of using crucibles.
The invention is carried out as follows:-
A brick tank or reservoir of shape and size according to the quantity of glass
required to be melted is lined with fire clay lumps and a fire-box or furnace
chamber is furnished at each end provided with door or doors in position as may be
most convenient for feeding the furnace with fuel.
Over each furnace chamber a crown or arch is built having one or more holes or
flues therein as may be required to allow of the fine grit and dirt arising from
feeding the furnace and from sudden draughts passing away into the flues so that
the grit and dirt shall not mix with the liquid glass. Au arch joining the arches
over the furnaces is also constructed over the melting tank or reservoir itself in
which arch there are also a number of piercings or openings to allow of the heat
passing off to the shafts.
Over the whole of the described construction at a height above the before
mentioned arches allowing such a space between them as may be found convenient
for purposes of clearing the flues is built another arch, in which there are provided
three shafts one being situate over each of the furnace chambers and one of larger
size over the centre of the melting tank reservoir or chamber. Each shaft being
provided with dampers for regulating the draughts.
The shafts over the fire chainbers are particularly for the purpose of drawing off
the dirt and grit from the furnace fires whilst feeding with fuel or such as may
arise from sudden draughts whilst they also serve to increase the draught and give
intensity to the furnaces.
In the sides of the reservoir there are a number of working holes, according to
the size of the reservoir, through which the glass can be drawn as required.
In the accompanying sheet of drawings Fig 1 represents a longitudinal section
of a furnace constructed according to this invention and Fig 2 a transverse section
at line a, b of Fig 1.
A is the melting tank or reservoir, B, B' are the firo boxes or furnace chambers
C, C are archies with draught holes c, c' over the said furnace chambers. D the
arch with openings & covering the inelting tank E is the external arch covering in
the whole construction. F F and G the shafts with the dampers ff and g H the
fire bridges. I the working holes. J the holes used in finishing the necks of
bottles.
The method of working this improved furnace will be readily understood by the
following description.
In feeding or replenshing say the furnace B the damper in the corresponding
shaft F would be opened and those in shafts and G would be closed, by which
the dust or grit from the furnace chamber that is being replenished would be drawn
through the openings c in the crown of the arch into the shaft instead of
over the fire bridge across an onto the molten glass contained in the
reservoir A.

page_text: In feeding the second furnace B' the operation is simply reversed, that is, the
damper in the shaft F would be opened and the others would be closed. In
this way the dust arising from the furnace being tended or replenished by reason
of all the draught being directed to the shaft immediately about it is carried
directly away without passing over the melting tank and the surface of the molten
metal is kept clean for working without stoppage.
To regulate the draught so that the fires may be burning with the same intensity
the damps may be opened or closed as required.
In this way the dust arising from the furnace being tended or replenished by
reason of all the draught being directed to the shaft immediately about it is carried
directly away without passing over the melting tank and the surface of the inolten
metal is kept clean for working without stoppage.
To regulate the draught so that the fires may be burning with the same intensity
the dampers may be opened or closed as required.
This construction of furnace may be employed in other than glass manufacture
when it is required to keep a mass of molten material upon a sole or heath or in a
melting tank free from dust dirt and products of combustion.
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
The improved furnace with the pierced arches C, C and D and their corresponding
shafts F, and G with the dampers fƒ and g the whole constructed and operating
as herein set forth and shown by the drawings.
WALTER A. BARLOW,
Agent for Sidney Henry Knott.