IMPROVEMENTS IN CRUCIBLES, MELTING POTS AND LADLES
Year: 1884

page_text: PROVISIONAL
DECIDICATION,
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and. Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for. "IMPROVEMENTS
IN CRUCIBLES, MELTING POTS AND LADLES a communication to me from abroad
by Wirth and Co. of Frankfort-on-the-Main acting as Agents for the firm of
E. G. Zimmermann of Hanau, both in the Empire of Germany, to be as follows:—
"1
This invention relates to improvements in crucibles pots and ladles for melting
and casting metals and it has for its object to retain the slag in the act of pouring
the metal. This end is accomplished by making the melted metal flow from the
bottom of the crucible melting pot or ladle by one or other of the following means.
1st By providing the crucible pot or ladle with an inner partition extending from
the top nearly to 'the bottom and forming a pouring channel separated from the
interior of the crucible' &c and communicating there with at the bottom part only
and leading to the pouring lip or spout of the crucible &c, whereby the slag collected
on the surface of the metal will be prevented from flowing out with the metal and
the destruction of the cover for preventing oxidation of the molten mass will be
avoided. Or if as is often done the molten metal is covered with powdered coal or
other material to prevent oxidation of the metal this protective layer remains
undisturbed when casting and the metal is not exposed to contact with the air.
2nd By means of a double crucible or melting pot consisting of a large crucible
of equilateral triangular shape at the top with a smaller one fixed in it which may
also be of similar shape at the. top, but is placed with its angles against or opposite
to the middle of the sides of the larger crucible (or of other suitable shape) so as
to leave the three angles of the outer crucible projecting beyond the sides of the
inner one in the manner of three spouts, two of which are closed by crucible lining
or other refractory material, whereby the inner crucible is held fixed within the
outer one. The inner crucible does not reach down to the bottom of the outer
crucible and it has a small hole in its bottom, through which the melted metal flows
into the outer crucible, while the slag and impurities are retained in the inner one.
The metal is poured through the third spout left open for the purpose.

page_text: COMPLETE SPECIFICATION.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for IMPROVEMENTS
IN CRUCIBLES, MELTING POTS, AND LADLES, (a communication to me from abroad
by Wirth and Company of Frankfort-on-the-Main, Agents for E. G. Zimmermann
of Hanau, both in Germany); and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:—
This Invention relates to improvements in crucibles, pots and ladles for melting
and casting metals, and it has for its object to retain the slag in the act of pouring
the metal. This end is accomplished by making the melted metal flow from the
bottom of the crucible, melting pot or ladle, in one or other of the ways hereinafter
described.
The invention is illustrated in the accompany drawings in which figure 1
represents à plan and figure 2 a section on line ab of a crucible or melting pot A
provided with an inner partition B extending from the top nearly to the bottom
and. forming a pouring channel separated from the interior of the crucible,
communicating therewith at the bottom part only and leading to the pouring lip or
spout C of the crucible, whereby the slag collected on the surface of the metal will
be prevented from flowing out with the metal and the destruction of the cover,
for preventing oxidation of the molten mass, will be avoided. Or if as is often done,
the molten metal is covered with powdered coal or other material to prevent
oxidation of the metal, this protective layer remains undisturbed when casting and
the metal is not exposed to contact with the air. After the casting is completed,
the slag &c remaining in the crucible is poured off by the ordinary spout D.
Figures 3 and 4 represent a plan and section on line c d, of a double crucible or
meiting pot consisting of a crucible F of equilateral triangular shape at the top, with
a smaller one E fixed in it which may also be of similar shape at the top, but is
placed with its angles against or opposite to the middle of the sides of the larger
crucible (or of other suitable shape) so as to leave the three angles of the outer
crucible projecting beyond the sides of the inner one in the manner of three
spouts 0, 0, 0, two of which are closed by crucible lining or other refractory
material, whereby the inner crucible is held fixed within the outer one. The inner
crucible E does not reach down to the bottom of the outer crucible and it has a
small hole G in its bottom through which the melted metal flows into the outer
crucible F, while the slag and impurities are retained in the inner' one E. .The
metal is poured off through the third spout O left open for the purpose.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1st A crucible, melting pot or casting ladle having a pouring spout or channel
divided from the interior of the crucible and reaching from the top nearly to the
bottom, where it communicates with the interior, so that in pouring the metal shall
flow from below and the supernatant slag shall be prevented from accompanying
the metal substantially as described.

page_text: 2nd The combination of two crucibles placed one within the other and communi-
cating by a hole in the bottom of the inner one, the outer one being sufficiently
larger than the inner one to receive the metal melted in the inner one and being
made of angular form or with a pouring spout which is separated from the inner
crucible and communicates only at bottom with the outer crucible, substantially as
and for the purpose shown and described.