IMPROVEMENTS IN THE MANUFACTURE OF ANNEALING POTS AND STANDS USED IN TIN WORKS
Year: 1876

page_text: LETTERS PATENT to John Francis, of Llanelly, in the County of Carmarthen,
'
Boiler Maker, for the Invention of IMPROVEMENTS IN THE MANUFACTURE OF
ANNEALING POTS AND STANDS USED IN TIN WORKS."
Sealed the 21st October 1876, and dated the 26th April 1876.
PROVISIONAL SPECIFICATION left by the said John Francis at the Office
of the Commissioners of Patents on the 26th April 1876.
"IM-
JOHN FRANCIS, of Llanelly, in the County of Carmarthen, Boiler Maker.
PROVEMENTS IN THE MANUFACTURE OF ANNEALING POTS AND STANDS USED IN TIN
WORKS."
My Invention has reference to the manufacture of annealing pots of wrought iron.
One defect in such pots as now made is that the top is liable to become loose or
give way in the fire so that the tin plate therein becomes considerably injured.
Now according to my Invention I make the top and sides of the pot from one plate
of wrought iron bent to the required form, and I fix the ends thereto by dovetailing
and welding them at the joints.
The Invention further consists in manufacturing the stands for annealing pots
with a plate placed horizontally above the bed of the stand. The pot is supported
by this plate instead of being directly supported by the bed, and is thereby prevented
bending or working in towards the tin plate when heating or cooling as it is liable
to do. The feet or stools which support the stand are formed with flanges, by
which they are rivetted to the stand. The stand and feet are thus much firmer
than when the ordinary mode is adopted of shouldering down the iron by which
the feet are rivetted.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said John Francis in the Great Seal Patent Office on the 25th October 1876.
LM-
JOHN FRANCIS, of Llanelly, in the County of Carmarthen, Boiler Maker.
PROVEMENTS IN THE MANUFACTURE OF ANNEALING POTS AND STANDS USED IN TIN
WORKS."
My Invention has reference to the manufacture of annealing pots of wrought iron.
One defect in such pots as now made is that the top is liable to become loose or
Price 1

page_text: give way in the fire so that the tin plate therein becomes considerably injured.
Now according to my Invention I make the top and sides of the pot from one plate
of wrought iron bent to the required form, and I fix the ends thereto by dovetailing
and welding them at the joints.
Figure 1 of the annexed Drawings is a perspective view, Figure 2 a side view,
Figure 3 á transverse section, and Figure 4 a horizontal section of a wrought-iron
annealing pot made according to my Invention; Figure 5 represents one of the end
plates of the same.
It will be seen that the top a and sides b, b, are made from one plate of wrought
iron bent to the required forin and provided with dovetails at the ends, and that
the end pieces c (Figure 5) have corresponding dovetails to fit into them. When
the end pieces have been put in place they are united to the sides b, b, and top a by
welding.
The Invention further consists in manufacturing the stands for annealing pots
with a plate placed horizontally above the bed of the stand. The pot is supported
by this plate internally, and is thereby prevented bending or working in towards
the tin plate when heating or cooling as it is liable to do. The feet or stools which
support the stand are formed with flanges, by which they are rivetted to the stand.
The stand and feet are thus much firiner than when the ordinary mode is adopted
of shouldering down the iron by which the feet are rivetted.
Figure 6 is a longitudinal section, and Figure 7 a plan of one of my improved
stands with a pot shewn thereon. is the stand, and c is a plate placed above the
bed of the same; this plate I prefer to be about 5/ths of an inch thick, which is
sufficient for the purpose, and will not occupy much of the internal capacity of the
pot. ff are the feet, which have flanges as shewn, and rivets are passed through
these flanges and through the bed of the stand as well as through the plate e. In
making the stand I prefer to dovetail the sides and ends together in a similar
manner to the sides and ends of the pots, and to unite them by welding, the
sides and ends being in one piece with the bed of the stand and turned up as
flanges.
And having now described the nature of my said Invention, and in what manner
the same is to be performed, I declare that I claim―
First. Manufacturing annealing pots for use in tin works with the top and sides
from one plate of wrought iron and with the ends fixed thereto by dovetailing and
welding, substantially as herein-before described.
Second. Manufacturing stands for annealing pots for use in tin works with a
plate on the bed, substantially as and for the purpose herein-before described.
In witness whereof, I, the said John Francis, have hereunto set my hand and
seal, this Twenty-third day of October One thousand eight hundred and
seventy-six.
JOHN FRANCIS. (L.S.)