IMPROVEMENTS IN THE MANUFACTURE OF GLASS
Year: 1852

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
TIMMINS CHANCE, of Handsworth, in the County of Stafford, Glass Manufac-
turer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twenty-ninth day of
March, One thousand eight hundred and fifty-two, in the fifteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said James Timmins Chance, my exors, admors, and assigns, Her especial
licence, full power, sole privilege and authority, that I, the said James
Timmins Chance, my exors, adññiors, and assigns, or such others as I, the
said James Timmins Chance, my exors, admors, or assigns, should at any
time agree with, and no others, from time to time and at all times during
the term of years therein expressed, should and lawfully might make, use,
exercise, and vend, within England, Wales, and the Town of Berwick-upon-
Tweed, the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF GLASS,"
partly communicated to me from abroad, and partly invented by myself; in
which said Letters Patent is contained a proviso that I, the said James
Timmins Chance, shall cause a particular description of the nature of the said
Invention, and in what manner the same is to be performed, by an instru-
ment in writing under my hand and seal, to be inrolled in Her Majesty's
High Court of Chancery within six calendar months next and inmediately

page_text: after the date of the said in part recited Letters Patent, as in and by the same,
reference being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
James Timmins Chance, do hereby declare that the nature of the said
Invention, and the manner in which the same is to be performed, are fully
described and ascertained in and by the following statement thereof, reference
being had to the Drawing hereunto annexed, and to the figures and letters
marked thereon, that is to say:-
The Invention consists of applying anthracite or stone coal in the manufac-
ture of glass.
And in order that the Invention may be most fully understood, I will proceed
to describe the means pursued by me.
It is well known that bituminous coal in burning gives off products which
are injurious to the color and character of glass when melted in open vessels,
and it is with a view to avoid or diminish such injurious effects that these
improvements are devised, and the same are carried into practice by varying
the construction of glass furnaces in such manner as to employ the fuel known
at right angles to that in Figure 1, and Figure 3 is a horizontal section taken
through the upper part of the furnace, which is arranged for four pots, but this
may be varied.
The furnace is very similar to those heretofore used, and the fuel is supplied
at the feed holes a, a, which is kept closed by the fuel outside, which from
time to time is forced into the furnace. I prefer the bed of the furnace to be
closed, which may be done by loaming" over the fire bars, or by having
sliding plates below them, or otherwise. c is the ashpit or space below the
fire. d, d, are pipes through which air is forced by a fan or other blower,
valves or other suitable means being used to regulate the quantity of air
admitted to the fire as may be required. I would mention that it has not been
found necessary to heat the air, but, if desired, a proper air-heating apparatus
may be introduced between the blowing machine and the furnace. e, e, are
the pots, which are of the ordinary construction. It is desirable that the
depth of the grate room below the entrance of the air-pipes should be sufficient
to hold an accumulation of ashes, and also that the "sieges". should be high
enough above the air-pipes to allow the flame to impinge on the lower as well
as on the upper parts of the pots.

page_text: I would state that, although I believe the arrangement shown, and above
described, to be the best, I do not confine myself thereto, as the same may be-
varied, so long as the furnace employed is suitable for burning anthracite or
stone coal.
What I claim is, the application of anthracite or stone coal in the manufac-
ture of glass.
In witness whereof, I, the said James Timmins Chance, have hereunto
set my hand and seal, the Twenty-ninth day of September, in the
year of our Lord One thousand eight hundred and fifty-two.