IMPROVEMENTS IN THE MANUFACTURE OF CROWN, SHEET, PLATE, AND BOTTLE GLASS."
Year: 1853

page_text: LETTERS PATENT to James Bowron, of Tyne and Tees Glass
Works, South Shields, for the Invention of "IMPROVEMENTS IN
THE MANUFACTURE OF CROWN, SHEET, PLATE, AND BOTTLE GLASS."
PROVISIONAL SPECIFICATION left by the said James Bowron at
the Office of the Commissioners of Patents, with his Petition,
on the 30th March 1853.
I, JAMES BOWRON, of Tyne and Tees Glass Works, South Shields,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN THE MANUFACTURE OF CROWN, SHEET, PLATE, AND BOTTLE GLASS" to be
as follows:-
The Invention consists of a modification of the furnaces used at
present for founding crown, sheet, plate, and bottle glass, by which, in
a furnace of a given size, two additional pots of metal can be founded.
This is done by continuing the sieges across the ends of the furnace in
the same way that they already are placed at the sides, and upon these
end sieges the additional pots are placed. The level of the grate room
is lowered, and the feeding is from the cases.

page_text: From this arrangement the following advantages arise; viz', the
room for additional pots of metal, consumption of smoke, and a saving
of fuel, prevention of a direct blast of air through the fire against the
sides of the pots, and by keeping the supply of coals in the cores
cleanliness is promoted and room is saved.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Bowron, in the Great Seal Patent Office,
on the 28th September 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
JAMES BOWRON, of Tyne and Tees Glass Works, South Shields, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of March, in the year
of our Lord One thousand eight hundred and fifty-three, in the sixteenth
year of Her reign, did, for Herself. Her heirs and successors, give
and grant unto me, the said James Bowron, Her special licence that I,
the said James Bowron, my executors, administrators, and assigns, or
such others as I, the said James Bowron, ny executors, administrators,
and 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, usc, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN THE MANUFACTURE
OF CROWN, SHEET, PLATE, AND BOTTLE GLASS," upon the condition (amongst
others) that I, the said James Bowron, 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 James Bowron, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof (that is to say):

page_text: This Invention consists of a modification of the furnaces used at
present for founding crown, sheet, plate, and bottle glass, by which, in
a furnace of a given size, two additional pots of metal can be founded.
This is done by continuing the sieges across the ends of the furnace in
the same way that they already are placed at the sides, and upon these
end sieges the additional pots are placed. The level of the grate room
is lowered, and the feeding is from the caves. From this arrangement
the following advantages arise; videlicet, the room for additional pots
of metal, consumption of smoke, and a saving of fuel, prevention of a
direct blast of air through the fire against the sides of the pots, and
by keeping the supply of coals in the caves cleanliness is promoted and
room is saved.
Having thus described the nature of my said Invention, I will pro-
ceed to describe the means of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1, is a ground plan of the sieges of a rectangular glass
furnace for founding crown, sheet, plate, and bottle glass; Figure 2, is
a side elevation; Figure 3, is an end view of the furnace, both within
the glass house and in the cave; and Figure 4, is a longitudinal section
taken through the line A, B, in Figure 1, of a ten pot furnace. It
will, however, be evident that in building furnaces the dimensions
may be varied so as to be suitable to receive other number of pots.
It is well known that heretofore in building furnaces for founding
crown, sheet, plate, and bottle glass that they are usually built in the
form of a bridge, the pots standing by the sides, and the grate room
runs from end to end through the centre. The pots a, a, are intro-
duced, and the ends built up, leaving openings b, b, for supplying the
fuel. In the present arrangement of furnace it will be seen, by the
drawings, that the same form of furnace is retained, but the grate or
fire bars c, c, are much lower than usual, which allows of the introduc-
tion of the fuel from the caves d, d, in place of its being fed through
the ordinary openings through the ends of the furnace; the sieges are
continued by throwing arches over that which would otherwise be grate
room. Upon which additional sieges the extra pots are placed. I would

page_text: remark that I am aware that it has before been proposed to make
furnaces for founding flint glass, with sieges all round. I do not,
therefore, claim the same, nor do I confine myself to the details herein
explained. But what I claim is the constructing of furnaces for found-
ing crown, sheet, plate, and bottle metal with sieges at the ends as well
as at the sides.
In witness whereof,. I, the said James Bowron, have hereunto
set my hand and seal, this Twenty-third day of September,
in the year of our Lord One thousand eight hundred and fifty-
three.
JAMES BOWRON. (Ls.)
Witness, Jonx WILSON.