IMPROVED MEANS FOR UTILIZING OLD AND WASTE CAST AND WROUGHT IRON ANNEALING POTS USED IN TIN-PLATE WORKS."
Year: 1876

page_text: LETTERS PATENT to David Williams, John Jenkins, John Jones, and David
Thomas, of Ynispenllwch, in the County of Glamorgan, for the Invention of
"IMPROVED MEANS FOR UTILIZING OLD AND WASTE CAST AND WROUGHT
IRON ANNEALING POTS USED IN TIN-PLATE WORKS."
PROVISIONAL SPECIFICATION left by the said David Williams, John Jenkins,
John Jones, and David Thomas at the Office of the Commissioners of Patents
on the 15th March 1876.
DAVID WILLIAMS, JOHN JENKINS, JOHN JONES, and DAVID THOMAS, of
Ynispenllwch, in the County of Glamorgan. "IMPROVED MEANS FOR UTILIZING
OLD AND WASTE CAST AND WROUGHT IRON ANNEALING POTS USED IN TIN-PLATE
WORKS."
This Invention relates to improved means for utilizing old and waste cast and
wrought iron annealing pots used in tin-plate work, and consists in making lining
pots or cases to fit one over another for enclosing in an air-tight manner the plates
to be annealed. These lining pots we cover with a cap or lid, upon which the flame
of the furnace is caused to impinge. The lining pots are inserted into the ordinary
pot of cast or of wrought iron after it has become cracked or rendered unfit for use
as an annealing pot itself. By this means we continue the employment of the cast
or wrought iron annealing pots after they are cracked and until they become com-
pletely destroyed instead of being, as at present, converted into cast or wrought
scrap iron as soon as cracked, which is often during the first burning in the
annealing furnace or after because of the too sudden contraction from exposure.
Our lining pots and covers are made of sheet-iron, and we propose to wash them
with lime white in order to economise fuel by the retention of the heat consequent
upon their being coated.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said David Williams, John Jenkins, John Jones, and David Thomas in the
Great Seal Patent Office on the 14th September 1876.
DAVID WILLIAMS, JOHN JENKINS, JOHN JONES, and DAVID THOMAS, of
Ynispenllwch, in the County of Glamorgan. "IMPROVED MEANS FOR UTILIZING
OLD AND WASTE CAST AND WROUGHT IRON ANNEALING POTS USED IN TIN-PLATE
WORKS."
This Invention relates to improved means for utilizing old and waste cast and
wrought iron annealing pots, used in tin-plate works, and consists in making a lining
pot or case for enclosing in an air-tight manner the plates to be annealed. The
lining pot is inserted into an ordinary pot of cast or of wrought iron after it has
become cracked or rendered unfit for use as an annealing pot in itself. By this
means we continue the employment of the cast or wrought iron annealing pot after
it is cracked and until it becomes completely destroyed instead of being, as at
present, converted into cast or wrought scrap iron as soon as cracked, which is often
during the first burning in the annealing furnace or after because of the too sudden
contraction from exposure.
Our Invention is clearly shown in the annexed Drawings, in which Figure 1 is a
perspective view of a shect-iron lining pot or vessel A, in which the plates to be
annealed are inserted after the lining pot is put into the cracked or burnt cast-iron
or wrought-iron pot, which would otherwise be considered as waste or useless and
be set aside for breaking up and remelting as scrap. The lining pot A has a flange B
all around to rest upon the top C of the old pot D, as in Figure 2, and a cover E,
shown separately and inverted in Figure 3, is placed over after luting the meeting
edges to render the interior of the pot air-tight, as is usual. The cover E has
depending flanges F, F, to strengthen it and to prevent it buckling under the heat
when in the annealing furnace.
Figure 4 is a view of one of our lining pots G of sheet-iron without the top
flange that it may be used as an exterior pot and in place of the usual cast or
wrought iron pot. This pot is intended to receive the flanged top sheet-iron pot, as
in Figure 5, which carries the cover, as before stated. Our lining pots and covers
are made of sheet-iron, and we propose to wash them with lime white in order to
economize fuel by the retention of the heat consequent upon their being coated.
Having now described the nature of our said Invention, and in what manner the
same is to be performed, we declare that we claim―
The employment of sheet-iron pots or vessels in the interior of and as linings to
ordinary cracked, burnt, or worn out cast-iron or wrought-iron annealing pots
used in tin-plate works, as set forth and substantially as shown in the annexed
Drawings.
Secondly. We claim the employment of annealing pots to be used in tin-plate
works composed of thin sheet-iron and arranged one within the other, as and for the
purposes set forth.
In witness whereof, we, the said David Williams and John Jenkins, for our-
selves and on behalf of the said John Jones and David Thomas, have
hereunto set our hands and seals, this Twelfth day of September One
thousand eight hundred and coventy six
DAVID WILLIAMS. (L.S.).
JOHN JENKINS.
(L.S.)