Improvements in the Manufacture of Moulds for the Purpose of Casting Cylindrical Forms in Steel and other Metals or Compounds of Metals.
Year: 1884

page_text: Improvements in the Manufacture of Moulds for the Purpose of
Casting Cylindrical Forms in Steel and other Metals or
Compounds of Metals.
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 MOULDS FOR THE PURPOSE OF CASTING CYLINDRICAL
FORMS IN STEEL AND OTHER METALS OR COMPOUNDS OF METALS" to be as
follows:-
This invention relates especially to the method of casting in which rotating
moulds are employed as is set forth in the Specification of a former Patent granted
to me No 3742 in the year 1879. According to my prosent mode I make a
compound mould consisting of an outer mould and lining or inner mould. The
latter is cylindrical on the interior and slightly conical or taper exteriorly. The
outer mould which receives it is of corresponding form. This is done for the
purpose of facilitating the immediate removal of the castings. The lining or inner
mould is removed with the casting leaving the outer mould ready to receive
another lining and to be again used without loss of tine. Theso arrangements not
only facilitate the immediate removal of the castings but by these I am enabled to
cast various sized shells within the same mould by adding loose linings. I provide
those moulds with spindles having interior screws operating loose end plates for
the purpose of forcing the castings out of the moulds. The conical shells
I perforate and rib for the escape of gases... By this means large quantities of
liquid metal can be run from one ladle into various sized shells at one and the same
melting.
Dated this 5th day of November 1884-
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Improvements in the Manufacture of Moulds for the Purpose of
Casting Cylindrical Forms in Steel and other Metals or the
Compounds of Metals.
I, JOSEPH WHITLEY of the 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 MOULDS FOR THE PURPOSE OF CASTING
CYLINDRICAL FORMS IN STEEL AND OTHER METALS OR THE COMPOUNDS OF METALS
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
Whereas hitherto I have cast cylindrical forms in moulds having parallel surfaces
by Letters Patont previously granted me N° 3742 of Sept: 18th 1879 by this my
present invention I now make a compound mould consisting of two or more
cylindrical parts having conic surfaces for tho purpose of facilitating immediate
removal of tho castings when large numbers are required to be cast from vessels
containing several tons of metal. For this purpose I form an outer shell the
interior of which is a cone or it may be conic outside also into which I place a
suitable conic shell or shells. These shells I perforate so as to facilitate the escape
of the gases generated during the casting process. The inner surface of the inmost
shell is formed with parallel lines or otherwise when required so that by this
means I not only facilitate the immediate removal of the respective moulds from
the base or outer shell but I am enabled to cast any size shell in the same base or
outer shell by simply determining the diameter required. When I require to cast
a chill casting then my inmost shell is not perforated In constructing these shells
for the purpose of forming the said moulds to any required diameter I turn and
bore the same upon their inner and outer surface by preference but the shells may
have projections faced to the required conic lines. When finally arranged I mount
the compound mould upon runners or otherwise and cause the saine to rotate.
Those moulds have portable ends so arranged that immediately a shell is cast the
interior shell with its casting in it can be taken out the conic liner being left on it
and another one placed in the mould and so on until the whole of the mass of
metal is consumed. The cast so made is protected by its outer conic shell which
produces a good annealing effect by letting down the heat apart from the direct
action of the atmosphere or the same preserves the heat whilst the shell so cast is
removed to the rolling mill to be completed as a shell or plate For the purpose of
forcing those shells so cast from the moulds a screw lever cam or other suitable
appliance is applied but by preference I use a loose inner end plate actuated by a
screw passing through the spindle which drives the mould having a nut at the
outer or inner end similar to the loose head spindle of a lathe by which to
overcome the expansion caused by the heat of the liquid metal, I also form loose
front and back plates with projecting rims so as to take up any expansion of the
conic liners arising from the repeated heating of the moulds which loose front
plates have proper slot holes so as to allow for any slight irregularity in the
bolt screw or cotter arrangement used for closing the mould or the same may be
screwed in.

page_text: DESCRIPTION OF DRAWING.
1, Headstock with hollow spindle, 2, Section of spindle 3, Face or carrying
plate, 4, Perforated conic mill, 5, Loose interior conic Shell, 6, External lid or
covering, 7, Loam covering, 8, End elevation of mill upon runners, 9, Cavity for
casting.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I wish it to be
perfectly understood that I do not bind myself to the precise mode or arrangement
herein described as these may be variously modified without departing from the
principle of my invention for instance I might form a series of rings split on one
side the total of which would form the required cone or I might form a series of
elongated slabs which when put in position would form a circular shell having a
parallel inside and a conic outside or with hoops coupled up or otherwise fixed on
the ends I declare that what I claim is
First. The construction of permanent moulds of a conic form to facilitate the
removal of castings made therein substantially as herein before described.
Second. The construction of liners for permanent moulds having lines of a conic
form on one side and parallel lines on the other substantially as herein before
described.
Third. The construction of loose ends having projections to take up irregularities
substantially as herein before described.
Fourth. The construction of conic shells having projections on the outer or inner
surface substantially as berein before described.
Fifth. The construction and application of a loose inner end plate for the
purpose of forcing out the shell and the casting it contains from the permanent
mould substantially as herein before described.
Sixth. The annealing of the shells cast in these conic liners substantially as
herein before described.
Seventh. The casting of a series of light shells out of a large vessel from a given
quantity of metal substantially as herein before described
Daled AL 001