Improvements in the Manufacture of Boiler Shells and Cylindrical Forms for other Purposes.
Year: 1885

page_text: Improvements in the Manufacture of Boiler Shells and Cylindrical
Forms for other Purposes.
I JOSEPH WHITLEY of Railway Works Leeds in the County of York Engineer
and Founder do hereby declare the nature of my invention for "IMPROVEMENTS
IN THE MANUFACTURE OF BOILER SHELLS AND CYLINDRICAL FORMS FOR OTHER
PURPOSES to be as follows:-
"
My improvements consist in the casting of cylindrical shells from suitable
hematite or other iron or the compounds of iron and the subsequent annealing of
shells so cast for the purpose of giving the required ductility and then rolling
hammering or otherwise forging the same to procure density and tensile strength
and further in special cases when required I temper the said shells in oil or other
suitable material for the purpose of giving still greater tensile strength.
I cast the required quantity of metal in a rotating mould or chill which may be
lined with loam or sand and dried and when set I place the shell in suitable decar-
bonizing material in a cast iron or other annealing box or shell so as to exclude the
air and raise the whole to a white heat When cooled down I roll hammer or
otherwise forge the shell to the required thickness and diameter.
The result of this is to convert the cast shell into a mild steel shell,
desired be cut and formed into a plate.
which may
if

page_text: Forms for other Purposes.
I JOSEPH WHITLEY of the Railway Works, Leeds, in the County of York,
Engineer and Founder, 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 stateinent :-
My improvements consist in the casting of cylindrical shells from suitable
hematite iron or hematite iron compounded with other iron or steel and the sub-
sequent annealing of the shells so cast for the purpose of giving the required
ductility and then rolling hammering or otherwise forging the same to procure
density and tensile strength and further in special cases when required I temper
the said shells in oil or other suitable material for the purpose of giving still
greater tensile strength. I cast the required quantity of metal in a rotating or
other mould or chill which may be lined with suitable loam or sand and dried
and when cast, and set, I place the shell so cast in suitable decarbonizing material
in a cast iron or other annealing box or shell so as to exclude the air and then
raise the whole to a white heat-when cooled down I roll, hammer or otherwise
forge the shell to the required thickness and diameter.
The result of this is to convert the cast shell into a mild steel shell which may
if desired be cut and formed into a plate. By this means I can form steam boiler
shells, water mains, pit linings, casings for piers and bridge purposes and other
cylindrical shells. Large water mains produced as above can be made considerably
lighter and stronger and therefore can be fixed in position at far less cost in labour
than heretofore.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. The herein described manufacture of cylindrical shells from cast hematite
iron or from hematite iron compounded with other iron or steel, substantially as
specified.
2. The method of treating cylindrical forms made of cast hematite iron or from
hematite iron compounded with other iron or steel which consists in annealing and
rolling, hammering or otherwise forging, substantially as specified.
3. The tempering of cylindrical forms made from cast hematite iron or from
hematite iron compounded with other iron or steel annealed and rolled, hammered
or otherwise forged, substantially as specified.
4. The construction of shells for steam boilers from cast hematite iron or from
hematite iron compounded with other iron or steel substantially as specified.
Dated this 22nd day of October 1885.