IMPROVE- * MENTS IN ANNEALING POTS AND IN THE MANUFACTURE OF THE SAME
Year: 1877

page_text: LETTERS PATENT to Arthur Alexander Ladislaus Butler, of Balsall Heath,
in the County of Worcester, Manager of Works, for the Invention of "IMPROVE-
* MENTS IN ANNEALING POTS AND IN THE MANUFACTURE OF THE SAME."
Sealed the 21st December 1877, and dated the 28th June 1877.
PROVISIONAL SPECIFICATION left by the said Arthur Alexander Ladislaus
Butler at the Office of the Commissioners of Patents on the 28th June 1877.
ARTHUR ALEXANDER LADISLAUS BUTLER, of Balsall Heath, in the County. of
Worcester, Manager of Works. "IMPROVEMENTS IN ANNEALING POTS AND IN
THE MANUFACTURE OF THE SAME."
:
Annealing pots as ordinarily manufactured are thinner at their open tops than at
the bottoms, the sides of the pot tapering from the bottom to the top. This
diminished thickness at the top of the pot results from the method of manufacture;
which consists in casting them in sand moulds formed in iron moulding boxes, the
tapering upwards of the sides being necessary in order to allow the pattern to leave
the mould.
The diminished thickness of the mouth or top of the annealing pot is a great
disadvantage, the said top or mouth being exposed to the greatest heat and wear
and tear, and the pot is frequently rendered useless by the top being worn away
while the lower part is in good condition.
According to my Invention the iron of the annealing pot is so distributed that
the pot is thickest and strongest at the top, where it is most exposed to leat and
wears away fastest, and tapers from the top downwards, where less strength is
required.
•
In order to cast annealing pots of this kind I adopt the following method - of
casting them :-Instead of employing a sand mould made in an iron casting box, I
employ a mould of solid cast iron. This mould is formed of two symmetrical halves,
joining each other in a vertical plane passing through the middle of the mould. One
of the halves is fixed to the base plate of the mould, and the other is moveable, but
capable of being fixed securely to the other half during the casting process. A core
is placed concentrically in the axis of the iron mould, the annealing pot being cast
Price 6d1

page_text: by pouring melted cast iron into the space between the core and the iron mould.
The mould may be formed to cast the annealing pot, together with its handles, in
either an upright or inverted position; in the latter case the core simply rests on
the base plate of the iron mould; in the former case it is suspended at the required
height in the axis of the iron mould.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Arthur Alexander Ladislaus Butler in the Great Seal Patent Office
on the 22nd December 1877.
ARTHUR ALEXANDER LADISLAUS BUTLER, of Balsall Heath, in the County of
Worcester, Manager of Works. "IMPROVEMENTS IN ANNEALING POTS AND IN
THE MANUFACTURE OF THE SAME."
This
Annealing pots as ordinarily manufactured are thinner at their open tops than at
the bottoms the sides of the pot tapering from the bottom to the top.
diminished thickness at the top of the pot results from the method of manufacture,
which consists in casting them in sand moulds formed in iron moulding boxes, the
tapering upwards of the sides being necessary in order to allow the pattern to leave
the mould.
The diminished thickness of the mouth or top of the annealing pot is a great
disadvantage, the said top or mouth being exposed to the greatest heat and wear
and tear, and the pot is frequently rendered useless by the top being worn away
while the lower part is in good condition.
According to my Invention the iron of the annealing pot is so distributed that
the pot is thickest and strongest at the top, where it is most exposed to heat
and wears away fastest, and tapers from the top downwards, where less strength is
required.
In order to cast annealing pots of this kind I adopt the following method of
casting them: Instead of employing a sand mould made in an iron casting
box, I employ a mould of solid cast iron. This mould is formed of two
or three symmetrical parts joining each other in a vertical plane. One of the parts
is fixed to the base plate of the mould, and the other part or parts is or are move-
able, but capable of being secured to the other fixed part during the casting process.
A core is placed concentrically in the axis of the iron mould, the annealing pot
being cast by pouring melted cast iron into the space between the core and the iron
mould. The mould is arranged to cast the annealing pot, together with its handles,
in an inverted position.
I will now proceed to describe with reference to the accompanying Drawings the
manner in which my Invention may be performed.
Figure 1 represents in elevation, Figure 2 in plan, and Figure 3 in vertical
section, a mould constructed according to my Invention for the manufacture of
annealing pots.
I will describe in connection with the said Figures 1, 2, and 3, my improvements
in the annealing pots themselves as well as in the manufacture of the same.
The same letters indicate the same parts in Figures 1, 2, and 3.
a, b, c, is the cast iron nearly cylindrical mould, formed by preference in three
pieces; the said mould is of somewhat larger diameter at bottom than at top. The
parts b and c are hinged to the part a at d and e, as best seen in Figure 2. When

page_text: the parts b and c are closed upon one another, as represented in Figure 2; they are
fastened in their closed positions by hinged staples and buttons f, f, as represented.
The nearly cylindrical mould a, b, c, has at bottom an internal flange g, slightly
undercut or inclined, as represented in Figure 3; h is a circular core plate, the
circumference of which is inclined, so as to make it fit loosely within the inclined
edge of the flange g. In the centre of the core plate h is a perforated tube i into
which the central hole k opens.
Upon the core plate h, and around the perforated tube i, a sand core is formed,
the said core having the figure of the interior of the annealing pot m. In using the
mould the parts a, b, c, are closed upon the core plate and core l, as represented in
Figure 3, the inclined edge of the flange g of the mould and the base plate h securing
the concentricity of the core in the mould ut, b, c, by the mere closing of the mould
upon the core. The mould and core are arranged for casting, as illustrated in
Figure 3, upon a level surface, or preferably upon a base plate. When a base plate
is used, the part a of the mould may be fixed thereto by rivetting or otherwise.
The mould and core having been arranged, as represented in Figure 3, melted cast
iron is poured from the top into the mould, and the mould filled therewith. The
air and vapour contained in the core escape by the perforated tube i and hole k.
The parts marked m, n, p, in Figure 3, formed by the melted cast iron poured into
the mould, constitute one of my improved annealing pots, the parts marked m con-
stituting the sides of the pot, the part n the bottom of the said pot, and the parts p, p,
the handles of the said pot, the said pot being cast in an inverted position, that is,
with its bottom n uppermost, and its open mouth downwards. After the casting
has cooled it is removed by unfastening the staples f, f, opening upon their hinges,
the parts b and c of the mould, and lifting the said pot m, n, p, off the core 1, l.
By an examination of the improved annealing pot m, n, p, thus made, it will be
seen that the metal is thickest .at the open mouth of the pot, and diminishes in
thickness from the mouth to the bottom n of the pot, and the said pot is thereby
better fitted to resist the wear and tear and exposure to heat to which the mouth
and open top of the pot are especially exposed than annealing pots of the ordinary
construction.
Having now described the nature of my Invention and the manner in which the
same is to be performed, I wish it to be understood that I claim as my Invention
of improvements in annealing pots and in the manufacture of the same,-
First. Making annealing pots with their nearly cylindrical sides thickest and
strongest at their open mouths or tops, the cast iron of which they are made
tapering from their open mouths or tops to their bottoms, as herein-before described,
and illustrated in the accompanying Drawings.
Secondly. Casting annealing pots in an iron mould containing a sand core,
the said mould core and appliances being constructed, arranged, and worked,
substantially as herein-before described, and illustrated in the accompanying
Drawings.
In witness whereof, I, the said Arthur Alexander Ladislaus Butler, have
hereunto set my hand and seal, this Twentieth day of December, in the year
of our Lord One thousand eight hundred and seventy-seven.
Witness,
GEORGE SHAW.
ARTHUR ALEXANDER LADISLAUS BUTLER. (L.S.)