AN IMPROVED METHOD OF CASTING CERTAIN KINDS OF CAST-IRON VESSELS
Year: 1819

page_text: t
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
HAZLEDINE, of Shrewsbury, in the County of Salop, Iron Founder, send
greeting.
WHEREAS His most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Fifteenth day of
January, in the fifty-ninth year of His reign, give and grant unto me, the
said William Hazledine, my exors, admors, and assigns, His especial licence,
full power, sole privilege and authority, that I, the said William Hazledine,
my exors, admors, and assigns, during the term of years therein mentioned,
should and lawfully might make, use, exercise, and vend, within England,
Wales, and the Town of Berwick-upon-Tweed, and also in all His Majesty's
Colonies and Plantations abroad, my Invention of "AN IMPROVED METHOD
OF CASTING CERTAIN KINDS OF CAST-IRON VESSELS; in which said Letters Patent
there is contained a proviso that if I, the said William Hazledine, shall not
particularly describe and ascertain the nature of my said Invention, and in
what manner the same is to be performed, by an instrument in writing
under my hand and seal, and cause the same to be inrolled in His Majesty's
High Court of Chancery within two calendar months next and immediately
after the date of the said Letters Patent, that then the said Letters Patent,
and all liberties and advantages whatsoever thereby granted, shall utterly

page_text: cease, determine, and become void, as in and by the same, relation being
thereunto had, will more fully and at large appear..
NOW KNOW YE, that in compliance with the said proviso, I, the said
William Hazledine, do hereby declare that the nature of my said Invention,
and the manner in which the same is to be performed, are described and
ascertained by the following Specification thereof, that is to say:
Firstly, that the nature of my said Invention consisteth in making cast-iron
vessels of the description usually termed hollow (ware, such as boilers, sugar
pans, soap boilers' pans, or distillers' pans, in such a manner that the said vessels
boilers, pans, &c., when so cast, may be more free from the defects which are
found in the bottoms of such vessels when cast in the ordinary and common
mode; and,
Secondly, that the manner in which my said Invention is to be performed
is as follows: That whereas it has heretofore been the common practice of
cast-iron founders, when making hollow ware as above described, to place the
mould in which the vessel is to be cast in such a position that the said vessel
may be cast with its mouth or open part downward and its bottom upward;
on the contrary, I invert or change the position of the mould so as to cast
the said boilers or other hollow ware with their mouths or open parts upwards
and their bottoms downward.
I shall now describe the manner of making the mould (being that which
I most approve, and which by experience I have found to answer best; (that
is to say, I make my core by first casting an iron vessel or pan of the
same shape as the inside of the article which I am about to make, but' of
less dimensions than the inside dimensions of the said article. This vessel or
pan (which for the sake of distinction I shall call the core pan) I make with
a number of holes in it; but as the use of the core pan, its dimensions, the holes
in the said pan, their size, and the number of holes which may be requisite,
are so well understood by every competent founder, it is superfluous to give a
more particular description thereof, further than to state that I do apply a
coating of loam or other fit material to the outside of the said core pan, so that
the shape and dimensions of the outside of the said coating of loam; &c. may
correspond to the intended shape and dimensions of the inside of the boiler,
pan, or other piece of hollow ware to be cast. And further, that whenever.
any boiler or other piece of hollow ware which I am about to make is of such
a shape as would necessarily prevent the core pan, if made of one piece, from
being withdrawn from the said boiler or other piece of ware, after having been
cast, I make the said core pan of a number of pieces, bolted or otherwise
fastened together, taking care to have the pieces of such a size as that each

page_text: piece may be easily taken out of the mouth or open part of the boiler or
other article whenever the core is to be removed therefrom. The method of
making the outer part of the mould, or that part thereof which is to form the
outside of the boiler or other piece of hollow ware intended to be cast, being
well understood, I need not here describe it. I will further state, that when
I have made the outside mould and the core, and have placed the core within
the same in the proper position, I secure it in that position by screw bolts or
other means, so that it may be firmly held down or prevented from rising
when the fluid metal is poured into the mould in the operation of casting. I
scarcely need add that the core may be made of loam, sand, or other fit
materials, without the use of the core pan, as before described, as no com-
petent workman would be at a loss in determining upon the kind of core best
suited to the intended purpose, according to the kind of hollow ware he is
about to make.
I lastly declare that although I have partially described the methods I have
adopted of forming the core and making the mould, I do not thereby claim
the said methods of making the mould, or the core for the said mould, as
forming any part of my said Invention; my Invention consists solely in placing
the moulds in such a position as that boilers and all descriptions of hollow
wares, such as the articles before described, may be cast with their mouths or
open parts upward, instead of being cast downward, according to the method
now in use and heretofore practised.
In witness whereof, I, the said William Hazledine, party hereto, hath
hereunto set his hand and seal, the Ninth day of March, in the
year of our Lord One thousand eight hundredond