IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR CASTING METALS IN METALIC MOUlds of HOLLOW, CYLINDRICAL, CONICAL, OR ANY OTHER FORM
Year: 1880

page_text: $
LETTERS PATENT to Lorentz Albert Groth, K.G.V., Civil Engineer and
Proprietor of the Scandinavian Patent Office, under the Firm of L. A. Groth
& Co., 97, Finsbury Pavement, London, and 20, Forhaabningsholms Allee,
Copenhagen, for an Invention of IMPROVEMENTS IN THE METHOD OF AND
APPARATUS FOR CASTING METALS IN METALIC MOUlds of HOLLOW,
CYLINDRICAL, CONICAL, OR ANY OTHER FORM." A communication from
abroad by Ferdinand Tellander, of Stockholm, in the Kingdom of Sweden.
PROVISIONAL SPECIFICATION left by the said Lorentz Albert Groth at the
Office of the Commissioners of Patents on the 25th November 1880.
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the
Scandinavian Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, and 20, Forhaabningsholms Allee, Copenhagen. "IMPROVEMENTS
IN THE METHOD OF AND APPARATUS FOR CASTING METALS IN METALIC MOULDS
OF HOLLOW, CYLINDRICAL, CONICAL, OR ANY OTHER FORM." A communication
from abroad by Ferdinand Tellander, of Stockholm, in the Kingdom of Sweden.
The object of this Invention is to be able in a practical manner to cast in metalic
moulds all kinds of metals, and to form them with hollow, cylindrical, conical, or
any other pattern, and so to shape them as to avoid the necessity of turning them
smooth in the lathe, as heretofore has been the case.
The apparatus consists of a body, the lower part of which forms the very hold
of the apparatus, and contains the cooling liquid. Upon the top of this hold there is a
lid, and over this lid the casting box is placed, which, in order to obtain its proper
position, is guided by two standards, which are placed at each of the opposite sides
of the casting box. From one side of the hold of the apparatus, and directly
beneath its lid, there is a bar or pale which moves in a groove made in the hold for
this special purpose, and thereby gives the rod or pale necessary support. The bar
or pale extends into the casting box to the middle of the core of the metalic
mould, and thereby supports the metalic core.

page_text: As soon as the casting has taken place, or at the very moment when the molten
mass is poured in and passes from liquid to solid form, the bar is removed, and then
the metalic core, losing its support, falls down into the cooling room.
Through the sand, which is placed in the casting box, two canals are formed, one
with the opening at the top and forming the inlet, and the other at the bottom of
the room, and thus forming the outlet for the air.
When, for instance, wheels-naves are to be casted, a particular hardening case
fitted on the metalic core is used for the purpose of hardening one end of the
nave.
There are also loose cores used when casting wheels'-naves in order to form the
holes in the naves into which the spokes of the wheels are to be fitted; this is the
case when bars of wrought iron are not to be founded in at the time of casting the
nave, otherwise the iron bars would have to be placed in the mould immediately
before the casting takes place.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Lorentz Albert Groth in the Great Seal Patent Office on the 24th
May 1881.
LORENTZ ALBERT GROTH, K.G.V., Civil Engineer and Proprietor of the
Scandinavian Patent Office, under the Firm of L. A. Groth & Co., 97, Finsbury
Pavement, London, and 20, Forhaabningsholms Allee, Copenhagen. "IMPROVEMENTS
IN THE METHOD OF AND APPARATUS FOR CASTING METALS IN METALLIC MOULDS
OF HOLLOW, CYLINDRICAL, CONICAL, OR ANY OTHER FORM." A communication
from abroad by Ferdinand Tellander, of Stockholm, in the Kingdom of Sweden.
The object of this Invention is to enable all kinds of metal to be cast in metallic
moulds in a practical manner, and to form them of hollow, cylindrical, conical, or
other shape without the necessity of turning them smooth in a lathe as has hereto-
fore been the case.
The apparatus consists of a body, the lower part a of which forms a vessel which
contains the cooling liquid. Upon the top of this vessel is a lid, and over this lid
is placed the casting box, which is guided into its proper position by two guide
standards h, placed at opposite sides of the casting box.
At one side of the lower part of the apparatus, and directly beneath its lid, is a
bar b, which slides in, and is supported by a groove formed for this purpose in the
said lower part. The said bar 6 extends into the apparatus to a distance sufficient
to enable it to support the metallic core c of the metallic mould. This metallic
mould c is provided with grease grooves m.
As soon as the casting has taken place, or at the moment when the molten mass d
is poured in and passes from the liquid to the solid form the bar b is removed, and
the metallic core c is then driven down with a hammer into the cooling chamber a
beneath.
The casting box or the moulds are provided with two canals or passages e, f, one
forming the inlet for the metal and the other the outlet or vent for the air.
When, for example, wheel naves or wheel cases are to be cast, a special hardening
case g, fitted on the metallic core c, is used for the purpose of hardening one end of
the nave, The lower end of the nave is hardened by the metallic part g of the
under box.
The inner part of the nave is hardened by the metallic core c.
I
When casting wheel naves, into which wrought iron spokes are to be subsequently
fitted, loose cores k, k, are employed as usual to form the holes for the reception of
such spokes. When such wrought iron spokes are to be fixed into the nave at the
time of casting they must be placed in the mould, as shown at 1-1, immediately
before the casting takes place.
Similar letters refer to like parts in each of the Figures 1, 2, and 3.
Having now described the nature of the said Invention, and the manner in which
the same is to or may be carried into effect, I would have it understood that what
I claim as the Invention to be secured by the hereinbefore in part recited Letters
Patent is,―
The improvements in the method of and apparatus for casting and chilling or
hardening on a metallic core all kinds of metals of hollow, cylindrical, conical, or
other form whereby they are shaped without the necessity of turning them in a
lathe, as hereinbefore described and illustrated in the Drawings hereto annexed.
In witness whereof, I, the said Lorentz Albert Groth, have hereunto set my
hand and seal, this Twenty third day of May, in the year of our Lord
One thousand eight hundred and eighty one.
LORENTZ ALBERT GROTH. (L.S.)