Improvements in the Manufacture of Common and other Cast Steel Shells.
Year: 1889

page_text: Date of Application, 16th Jan., 1889
Complete Specification Left, 16th Oct., 1889-Accepted, 23rd Nov., 1889
TRUY DIUNAL DIUI IUATIVA.
Improvements in the Manufacture of Common and other Cast Steel
Shells.
We ROBERT ABBOTT HADFIELD of Sheffield in the County of York Stoel
Manufacturer and ALEXANDER GEORGE MACKENZIE JACK of Sheffield aforesaid
Engineer do hereby declare the nature of this invention to be as follows:-
as
This Invention has for its object to greatly facilitate the casting of what are known
common cast steel shells and also of shrapnel and other cast steel shells.
"
Our invention consists in casting such shells in an iron mould or chill having a
paper or other suitable lining by preference a combustible lining. Both the chill and
lining, or the chill or lining only is or are preferably coated with oil, tar or any
other suitable substance or material-The mould or chill is fitted with a runner box
having a series of perforations apertures or openings formed therein through which
the molten steel flows or drops into the mould. Such chill or mould may be of any
suitable construction and when requisite or desirable may be water jacketed.
By this improved system of casting we are able to readily and effectively cast much
smaller sized shells than it has hitherto been practicable to do, such for instance as
4 or 5 shells. We also obtain better and sounder castings and effect a considerable
economy in the cost time and labor of manufacture by saving the moulding of the
body of the shell and dispensing with the operation of drying the mould which is
indispensable when the mould is made of sand or composition is hitherto.
Another considerable advantage is that by our invention we ensure a much smaller
per centage of wasters when casting steel shells of any size than if such shells were
cast in sand or composition moulds in the ordinary manner.
ELT & Co.,
33, Southampton Buildings, Holborn, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Common and other Cast Steel
Shells.
We, ROBERT ABBOTT HADFIELD, of Sheffield, in the County of York, Steel
Manufacturer, and ALEXANDER GEORGE MAOKENZIE JAOK, of Sheffield aforesaid,
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 :-
This Invention has for its object to greatly facilitate the casting of what are known
as common cast steel shells, and also of shrapnel and other cast steel shells.
"
Our invention consists in casting such shells in an iron or other suitable metal
mould or chill, having a paper or other suitable lining; by preference a combustible
lining. Both the chill and lining, or the chill, or lining only, is or are preferably
coated with oil, tar, or any other suitable substance or composition-Before casting
the shell we reek the mould or chill by placing a pan of lighted tar thereunder, the
carbonaceous fumes arising from which are deposited on the sides of the chill in the
form of a coating-The mould or chill is fitted with a runner box having a series of
apertures therein, through which the molten steel flows or drops into the mould or
chill-The latter may be of any suitable form and when requisite or desirable it may
be water jacketed.
The accompanying drawing is a view in vertical section of our improved mould or
chill with runner box-A is the chill which is made in two or more parts and is of
LD Ը

page_text: any suitable shape-B is the paper or other suitable lining which preferably terminates
just above the conical apex of the mould or chill as shewn-C is a bracket whereon
the chill is carried-D is a centreing plate by means whereof the core spindle E' of
the core E is kept in position-E' is a turned collar on the core spindle which fits
into the centreing plate D. E³ are screws by means whereof the core spindle is
adjusted concentrically with the chill or mould-F is the runner box which is pre-
ferably lined with any suitable refractory material-F are the apertures in the bottom
thereof through which the molten steel drops as it is poured in-These apertures are
so placed, as to allow of the molten steel dropping into the space between the core and
the sides of the mould or chill.
By this improved system of casting common and other cast steel shells, we-are-able.
to readily and effectively cast shells of a much smaller size than it has hitherto been.
practicable to do; such, for instance, as 4" or 5" shells-We also obtain better and sounder
castings, and effect a considerable economy in the cost, time, and labor of manufacture,
by saving the moulding of the body of the shell, and dispensing with the operation of
drying the mould, which is indispensable when it is made of sand or composition―
Another advantage is, that by our invention we ensure a much smaller per centage of
wasters, when casting steel shells of any size, than if such shells were cast in sand or
composition moulds in the ordinary manner-We also produce a much smoother
-surface on the casting than is otherwise obtainable, and prolong the life of the mould
or chill, owing to the molten-metal being kept from actual contact therewith.
We would here observe that we do not confine ourselves-to-the-precise details of
construction hereinbefore described and shewn as the same admit of modification
without departing from the essential features of our invention.
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. The improved mould or chill substantially as hereinbefore described and shown
for casting common and other east steel shells.
2. In combination with such improved mould or chill a paper or other suitable
lining substantially as herein before described and shewn.
3. In combination with such mould or chill a runner box constructed and arranged
all substantially as hereinbefore described and shewn.
4. The improved method of casting common and other cast steel shells substantially
as herein before described.
Dated this 16th day of October 1889
ELT & Co.,
33, Southampton Buildings, Holborn, London, Agents for the Applicants.