Improvements in Means employed in Casting Hollow Ingots and other Hollow Articles.
Year: 1892

page_text: Date of Application, 26th May, 1592
Complete Specification Left, 27th Mar., 1893-Accepted, 13th May, 1893
PROVISIONAL SPECIFICATION.
Improvements in Means employed in Casting Hollow Ingots and
other Hollow Articles.
We,
HOWARD CRAMP, of 1736 Spring Garden Street, Philadelphia, Pennsyl-
vania, in the United States of America, Steel and Bronze Founder, and JOSEPH
ELTON BOTT, of Brinnington Hall, Stockport, in the County of Chester, Engineer,
do hereby declare the nature of this invention to be as follows:-
The invention relates primarily to means employed in the casting of hollow
ingots, but is also applicable to the casting of other hollow articles.
In the casting of a hollow ingot we proceed as follows: we prepare an annular
core of carbon and treacle, or other saccharine substance or other suitable combining
material, ground and mixed together and formed in a mould around a metal tube,
or around any suitable core, preferably extending at each end beyond the carbon
core, after which it is baked or dried in a suitable oven.
The core thus prepared is then placed in an ingot mould box, and the ingot cast
within the space around the annular carbon core; at the proper time the central
plug or tube is driven out, thereby permitting of the carbon core to collapse on the
contraction of the metal ingot. The carbon core after use can be reground and
worked up time after time.
In the casting of other hollow articles we proceed as above but we form the
carbon core and internal plug or tube of the shape required for the article to be
produced.
When it is desired that the internal face of the ingot should be hard, the carbon
core is allowed to come into contact with the metal forming the ingot, whereby a
portion of the carbon is absorbed thereby, but when it is desired that the internal
face of the ingot should be soft, the carbon core is nickel plated, thereby preventing
absorption by the ingot metal of carbon from the carbon core.
2003
HOWARD CRAMP,
J. ELTON BOTT,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Means employed in Casting Hollow Ingots and
other Hollow Articles.
We, HOWARD CRAMP, of 1736 Spring Garden Street, Philadelphia, Pennsyl-
vania, in the United States of America, Steel and Bronze Founder, and JOSEPH
ELTON BOTT, of Brinnington Hall, Stockport, in the County of Chester, Engineer,
do hereby declare the nature of this invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement, reference being had to the accompanying drawings and to the figures
and letters marked thereon:-
The invention relates primarily to means employed in the casting of hollow
ingots, but is also applicable to the casting of other hollow articles.
The drawing represents, at Figure 1, a section and, at Figure 2, a plan of an
ingot mould box with an ingot cast therein around a core constructed according to
our invention.
In the casting of a hollow ingot we proceed as follows; we prepare an annular

page_text: core a of carbon and treacle, or other saccharine substance or other suitable
combining material, ground and mixed together and formed in a mould around a
perforated metal tube b, or around any suitable porous plug or core, preferably
extending at each end beyond the carbon core, as shown at 'b', after which it is
baked or dried in a suitable oven.
The core thus prepared is then placed in an ingot mould box, and the ingot c
cast within the space around the annular carbon core; at the proper time the
central plug or tube bis driven out, thereby permitting of the carbon core a to
collapse on the contraction of the metal ingot c. The carbon core a after use can
be reground and worked up time after time.
In the casting of other hollow articles we proceed as above, but we form the
carbon core a and internal plug or tube b of the shape required for the article to be
produced.
When it is desired that the internal face of the ingot should be hard, the carbon
core a is allowed to come into contact with the metal forming the ingot, whereby a
portion of the carbon is absorbed thereby, but when it is desired that the internal
face of the ingot should be soft, the carbon core is nickel plated, thereby preventing
absorption by the ingot metal of carbon from the carbon core a.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
1. In the casting of hollow ingots and other hollow articles, the combination
with an ingot or other mould, of a hollow carbon core supported by an internal
perforated or porous tube or core, which latter is removed from the carbon core
after the metal has been poured into the mould to permit of the contraction of the
ingot or other article, substantially as herein described.
2. In the casting of hollow ingots and other hollow articles, the combination
with an ingot or other mould, of a hollow nickel plated carbon core supported by
an internal perforated or porous tube or core, which latter is removed from the
carbon core after the metal has been poured into the mould to permit of the
contraction of the ingot or other article, substantially as herein described.
Dated 11:
UHIN
in day
March 10
1030
OCOL HOLPTY TO (17) 110 Sitta nan
HOWARD CRAMP,
J. ELTON BOTT,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.