A NEW OR IMPROVED FURNACE TO BE USED IN THE ManuPactuRE OF GLASS
Year: 1875

page_text: LETTERS PATENT to George Scott, of Glasgow, in the County of
Lanark, North Britain, for the Invention of "A NEW OR IMPROVED
FURNACE TO BE USED IN THE ManuPactuRE OF GLASS”
Sealed the 5th May 1876, and dated the 8th December 1875.
PROVISIONAL SPECIFICATION left by the said George Scott at the
Office of the Commissioners of Patents, with his Petition, on the
8th December 1875.
I, GEORGE SCOTT, of Glasgow, in the County of Lanark, North Britain,
do hereby declare the nature of the said Invention of "A NEW OR
IMPROVED FURNACE TO BE USED IN THE MANUFACTURE OF GLASS," to be as
follows, that is to say :—
•
This Invention relates to a new or improved furnace to be used in
the melting of the materials of which glass is formed.
The new or improved furnace consists of a fire-grate, on both sides of
which is a tank or flat receptacle in which the glass is melted.

page_text: The fire-grate or fire-bars may be either on a level or nearly so with
the upper part of the bridges which form one side of the tanks, in which
case the bridges are made solid, or they may be placed at a lower level,
in which case the bridges may have a hollow space formed through them
after the manner of the furnaces used for puddling iron.
The fire-grate may be fired from one or both ends, and it, as well as
the tanks, are covered with a roof so as to cause the heat and flame to
be reverberated down on to the glass making materials, that is to say,
one roof may cover both the tanks and fire-grate, or three separate roofs
may be used, namely, one for each tank and another for the fire-grates.
By means of this Invention fire-grates or cupolas" exterior to the
tanks as at present used are avoided, and the further advantage is
obtained of melting and working two different kinds of glass from one
furnace.
$6
The improved furnace is placed under a hollow conical chimney as in
existing glass furnaces, and the products of combustion are drawn
away through the working holes.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Scott in the Great Seal Patent Office on
the 7th June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
SCOTT, of Glasgow, in the County of Lanark, North Britain, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of December, in the
year of our Lord One thousand eight hundred and seventy-five, in
the 39th year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said George Scott, Her, special
license that I, the said George Scott, my executors, administrators,
and assigns, or such others as I, the said George Scott, my executors,
administrators, or assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
2

page_text: vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "A NEW OR IMPROVED
FURNACE TO BE USED IN THE MANUFACTURE OF GLASS," upon the condition
(amongst others) that I, the said George Scott, by an instrument in
writing under my hand and seal, should particularly describe and
ascertain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said George Scott, do hereby declare the
nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying Drawings,
and to the letters and figures marked thereon, that is to say :-
My said Invention relates to a new or improved furnace to be used in
the melting of the materials of which glass is made.
The new or improved furnace consists of a fire-grate, on both sides
of which is a tank or flat receptacle in which the materials are melted.
The bars of the fire-grates may either be on a level with the upper
part of the bridges which form one side of the tanks, or they may be
placed at a lower level.
And in order that my said Invention may be properly understood I
now proceed more particularly to set forth the system, mode, or manner
in or under which the same is or may be used or practically carried into
effect, reference being had to the annexed Sheet of Drawings and to the
letters and figures marked thereon, that is to say :—
On the Sheet of Drawings hereunto appended Figure 1 is a vertical
section of the new or improved furnace as constructed in accordance
with one modification of my said Invention, whilst Figure 2 is a
horizontal section of the same on the line a, b, Figure 1. As scen by
these Figures the furnace consists of two fire-grates A, which are
divided from each other at their inner ends by a fire-bridge B, and to
these grates air for supporting combustion of the fuel is supplied from a
cave or channel O, extending across the furnace underneath the fire-
grates. On each side of the fire-grates A a tank or flat receptacle E is
situated, and in which the glass making materials are placed to be
melted. A roof F, extending from one side of the furnace to the other,

page_text: covers both the tanks E and fire-grates A in such a manner as to cause
the heat from the fire-grates A to be reverberated down on the glass-
making materials contained in the tanks or receptacles E.
In the furnace shewn on the Drawings now under reference, the sides
of the tanks next the fire-grates A are built up to the roof, excepting at
the parts opposite the bridge B, where openings a are made for the
passage of the heated products of combustion into and through the
tanks, other openings 6 being made in the ends of each tank through
which the waste products of combustion pass outwards from the
furnace.
Under another modification the bridge B is dispensed with, and the
fire-grate A made to extend along the whole length of the tank, the said
grate being fired either from one or both ends. With this arrangement
an opening is made at one end of each tank for the inward passage of
the flame from the fire-grate, and an opening at the other and opposite
end for the passage of the waste products of combustion outwards, that
is to say, the inlet openings are made at G or H, Figure 2, and the outlet
passages at I or J, the direction of the current being from G to I or
H to J in each tank respectively. The arrangement shewn on the
Drawings is that preferred when two or more working holes are made in
cach tank, and that herein last described when one hole only is
provided.
Under another modification of the Invention instead of providing
special exit passages from the tanks in either of the modes herein-before
described, the waste products of combustion may pass away from the
tanks through the working holes thereof, and in any of the modifications
set forth, instead of placing the bars of the fire-grate or fire-grates at a
level lower than the bottoms of the tanks as shewn on the Drawings,
the said fire-bars may be placed at a higher level.
The tanks E and fire-grate or grates A, instead of being covered with
a roof composed of one arch or span, as seen at Figure 1 of the Drawings,
may be covered by separate roofs, or by a roof composed of three
distinct arches or spans, as shewn in vertical section at K, Figure 3, of
the Drawings.
By means of this Invention fire-grates or "cupolas " exterior to the
tanks as at present used are avoided, and the further advantage is

page_text: obtained of being able to melt and work two different kinds of glass in
onc furnace, that is to say, one kind in each tank.
Having now described and particularly ascertained the nature of my
said Invention, and the system, mode, or manner in or under which the
same is or may be used or practically carried into effect, I would observe
in conclusion that what I consider to be novel and original, and there-
fore claim as the Invention secured to me by the herein-before in part
recited Letters Patent is, the new or improved glass furnace constructed
under any of the modifications herein-before described, and consisting
of the combination of a fire-grate or grates situated between two tanks
and covered either with one arch or roof, or with three distinct arches
or roofs, as shewn on the accompanying Drawings, substantially as set
forth.
forth.
In witness whereof, I, the said George Scott, have hereunto set my
hand and seal, this Fifth day of June, One thousand eight
hundred and seventy-six.
GEORGE SCOTT. (LS)