IM- PROVEMENTS IN APPARATUS FOR CASTING METAL
Year: 1878

page_text: LETTERS PATENT to Eric Hugo Waldenström and William Sumner, both of
Manchester, in the County of Lancaster, Engineers, for the Invention of "IM-
PROVEMENTS IN APPARATUS FOR CASTING METAL."
Sealed the 20th September 1878, and dated the 12th April 1878.
PROVISIONAL SPECIFICATION left by the said Eric Hugo Waldenström
and William Sumner at the Office of the Commissioners of Patents on the
12th April 1878.
ERIC HUGO WALDENSTRÖM and WILLIAM SUMNER, both of Manchester, in the
County of Lancaster, Engineers. "IMPROVEMENTS IN APPARATUS FOR CASTING
METAL."
This Invention is particularly applicable to the moulds in which brass or copper,
or alloys of copper are poured in a molten state in order to produce cylinders or
other articles, either hollow or solid. It is customary in the use of such moulds to
cool them by the application of water, either by pouring it on the mould or placing
the mould partly in water.
In our Invention we make the metal forming the mould hollow, instead of being
solid as hitherto, and through the chambers or cavities thus made in the sub-
stance. of the mould we cause water to circulate, and thus produce the cooling
effect.
In the present method of casting brass cylinders from which tubes are made,
much time and labour is expended in moving the mould for the purpose of cooling,
preparing it for a fresh casting, and replacing it into a suitable position to receive
the molten metal, but our improved system of cooling enables us to dispense with
all this labour and loss of time, and the moulds are rendered more durable, and
better work is produced.
By turning steam or warm water into the cavities in the substance of the mould
we are enabled to warm the mould before commencing work, so as to get it quickly
to a suitable temperature to produce a good casting.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Eric Hugo Waldenström and William Sumner in the Great Seal Patent
Office on the 11th October 1878.
ERIC HUGO WALDENSTRÖM and WILLIAM SUMNER, both of Manchester, in the
County of Lancaster, Engineers. "IMPROVEMENTS IN APPARATUS FOR CASTING
METAL."
This Invention is particularly applicable to the moulds in which brass or copper,
or alloys of copper, are poured in a molten state in order to produce cylinders or
other articles, either hollow or solid. It is customary in the use of such moulds to
cool them by the application of water, either by pouring it on the mould or placing
the mould partly in water.
In our Invention we make the metal forming the mould hollow, instead of being
solid as hitherto, and through the chambers or cavities thus made in the sub-
stance of the mould we cause water to circulate, and thus produce the cooling
effect.
In the present method of casting brass cylinders from which tubes are made
much time and labour is expended in moving the mould for the purpose of cooling,
preparing it for a fresh casting, and replacing it into a suitable position to receive
the molten metal, but our improved system of cooling enables us to dispense with
all this labour and loss of time, and the moulds are rendered more durable, and
better work is produced.
By turning steam or warm water into the cavities in the substance of the mould
we are enabled to warm the mould before commencing work, so as to get it quickly
to a suitable temperature to produce a good casting.
And in order that our Invention may be fully understood and readily carried
into operation, we will proceed to describe the accompanying Sheet of Drawings.
Fig. 1 is a sectional elevation of our improved apparatus, suitable for casting
hollow cylinders, and Fig. 2 is a transverse section of the same drawn to an enlarged
scale; Fig. 3 is a plan of the upper part of the mould.
-
a represents the floor of the casting pit, and b the working platform of the
foundry; c is the fixed part of the mould, which is secured above to the platform b
and below to a beam on the floor a. To the fixed part c is hinged the movable
part ; these two parts are secured together by the clamps e hinged to the part c,
and provided with tightening screws f. In the fixed part of the mould c are the
chambers or cavities c¹, c², and similar chambers or cavities d', d³, are made.in the
movable part d. At the lower end of the part c is a slide rod g and holding
screw g, the object of which is to hold in position the bush or bottom bit i, the
outer diameter of which corresponds to the diameter of the cylinder to be cast, and
the inner diameter to the size of the core h, which is made on a core barrel as usual.
The lower end of the core is supported in the bottom bit i, and the upper end of
the core barrel is supported in the bearing c³, shewn on an enlarged scale in Fig. 3;
the bearing c³ is hinged to the fixed part of the mould c.
Water or other fluid under pressure is supplied to the cavities or chambers in the
two parts of the mould from the main pipe j and branch pipe k, to the end of which
are fixed the flexible tubes c, d, or other equivalents, which are connected
respectively to the two chambers or cavities c¹, d₁. The branch pipe is also con-
nected to the steam pipe m.
The mode of operation is as follows:-As soon as a cylinder has been cast the
attendants loosen the clamps e and throw them back; they then open the mould
by inserting a lever into the boss cast to the movable part d, as shewn in dotted
lines in Fig. 2; they then open the hinged bearing 3, after which the cylinder
with the core and barrel can be removed. The water or other fluid is then turned
on to cool the mould, the arrows in Fig. 1 shew the direction in which the water
or other fluid rises in the chambers c¹, d', and descends through the chambers c², d³,

page_text: and is allowed to run off into a drain. During the time that the water or other
fluid is circulating and cooling the mould the usual cleaning and preparing for the
next casting can be performed. It is evident that the water or other fluid can be
turned on during the running of the metal, or immediately after.
Before commencing work it may be necessary to warm the mould slightly and
expeditiously, and this is done by turning steam and hot water into the cham-
bers c', c, and d¹, d. The steam and hot water can be turned on at any time to
keep the mould at the proper temperature for casting. By this means the mould
may be kept at all times in a vertical or nearly vertical position, thus affording
great facility to the workmen for preparing the mould, which is rendered more
durable owing to the uniform cooling.
Having thus stated the nature of our Invention and described the manner of
performing the same, we wish to remark that we do not claim making the mould
in two parts hinged together, as that has before been done; we wish it also to be
understood that our Invention is applicable to moulds for casting hollow or solid
articles of various descriptions, and we claim,
First. Making the metal forming the mould with chambers or cavities for the
circulation of water or other fluid, and for steam or hot water or other fluid, for
the purposes described.
And, Secondly. The improved mode of supporting the top end of the core in a
central position, as shewn best in Fig. 3.
In witness whereof, I, the said Eric Hugo Waldenström, for myself and on
behalf of the within-named William Sumner, have hereunto set my hand
and seal, this Tenth day of October, One thousand eight hundred and
seventy-eight.
ERIC HUGO WALDENSTROM. (L.S.)