IMPROVEMENTS IN THE MANUFACTURE OF SAND MOULDS FOR CASTING CISTERNS AND OTHER HOLLOW- WARE, AND IN APPARATUS THEREFORE."
Year: 1880

page_text: LETTERS PATENT to Thomas Henry Chatton, of Little Lever, near Bolton,
in the County of Lancaster, for an Invention of "IMPROVEMENTS IN THE
MANUFACTURE OF SAND MOULDS FOR CASTING CISTERNS AND OTHER HOLLOW-
WARE, AND IN APPARATUS THEREFORE."
PROVISIONAL SPECIFICATION left by the said Thomas Henry Chatton at
the Office of the Commissioners of Patents on the 10th July 1880.
THOMAS HENRY CHATTON, of Little Lever, near Bolton, in the County of
Lancaster. "IMPROVEMENTS IN THE MANUFACTURE OF SAND MOULDS FOR
CASTING CISTERNS AND OTHER HOLLOW-WARE, AND IN APPARATUS THEREFOR."
In casting ordinary cisterns and other like hollow-ware a thin pattern is used
and drawn out of the sand. This is productive of evil, in that the thin patterns
unless of metal are liable to fracture, and frequently draw up the sand with them,
requiring very careful drawing and skilled labour.
Now my Invention is designed to do without thin patterns, and work in such
manner that skilled labour may almost be dispensed with.
I place my box on a table; through a hole in this table the pattern forming the
cistern slides on a central spindle or other parallel motion. This pattern is a solid
block. The outer box is then filled with sand and the top put on; the block
forming the pattern is then lowered.
The core is made in a stout box, whose inner contour corresponds with that of an
ordinary pattern. This is placed on the bottom box and sand well rammed in.
The pattern is then raised, the middle and upper box placed in position, gates made
in the usual manner, and the whole is ready for casting.
This Invention is applicable not merely to cisterns, but to the casting of boxes or
other hollow-ware of a square, cylindrical, conical, domed, or other shape, in which
the sides are vertical or only curved inward toward the bottom.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Henry Chatton in the Great Seal Patent Office on the
10th January 1881.
THOMAS HENRY CHATTON, of Little Lever, noar Bolton, in the County of
Lancaster. "IMPROVEMENTS IN THE MANUFACTURE OF SAND MOULDS FOR
CASTING CISTERNS AND OTHER HOLLOW WARE, AND IN APPARATUS THEREFOR."
In casting ordinary cisterns and other like hollow-ware a thin-pattern-is-used-
and drawn out of the sand. This is productive of evil, as the patterns are apt to
draw up the sand with them, requiring very careful drawing and skilled labour.
Those patterns too are in most cases made of wrought iron platos a quarter of an 1
inch thick, and being so thin are very apt to bulge in or out when ramming, which
is a great evil. When the patterns are made of cast iron, they are very liable to
breakages or often go very crooked, another great evil.
Now my Invention is designed to do without thin patterns, and work in such
manner that skilled labour may almost be dispensed with, and lighter castings made 1
than is practicable in the ordinary process.
The Invention is best described by aid of the accompanying Drawings, in which
Fig.-1 is-a-side elevation; Fig. 2, a sectional elevation of the machine; Fig. 3, plan;
Fig. 4, bottom box with slides, with box G in place for moulding the core; Fig. 5;
plan of same, and Fig. 6 represents the relative position of the three boxes.
I place my box A on a table B, the lugs on the box fitting pins K, K, of table.
Through a hole in this table the pattern C forming the cistern slides on a central
spindlo D or other parallel motion, being raised by means of levers L, links M, and
gudgeons (or journals with slides) N working in slots P. This pattern C is a solid
block or strong hollow pattern incapable of bulging. The space E between the
outer box A and the pattern block is then filled with sand, and the top flask or
box F put on. The block C forming the pattern is then lowered.
The core is made in a stout box G, whose inner contour corresponds with that of
an ordinary pattern. This is placed on the bottom box H (fitting between the
guides J), and sand well rammed in. The pattern is then raised, being guided by:
the guides J, J, fixed to the bottom box H, the middle and upper box S placed in
position, being also guided by guides J and tied together by them if necessary,
gates made in the usual manner, and the whole is ready for casting the cistern
bottom upward.
This Invention is applicable not merely to cisterns, but to the casting of boxes or
other hollow-ware of a square, cylindrical, conical, domed, or other shape, in which
the sides are vertical or only curved inward toward the bottom.
Having now described my Invention, and the best mode known to me of
carrying it into effect, I wish it to be understood that I am well aware that it is no
now thing in forming sand moulds to raiso up or withdraw a pattern through a
plute or table upon which the mould is made, and also that there is nothing specially
new in the form of my boxes or flasks or guides J, but that what I believe
to be new and desire to protect under the hereinbefore in part recited Letters
Patent is,―
First. The improvement in the manufacture of sand moulds for casting cisterns
and other hollow-ware of like character, herein described, in which the use of a thin
pattern corresponding to the shape of the sides of the hollow-ware is dispensed
with, and in its place only a solid or thick strong pattern raised up and down by
machinery is used to form the outside surface of the casting, and a coro formed on
the bottom plate, substantially as described, forms the inner surface.
Second. The apparatus for inaking sand moulds for casting cisterns and other liko

page_text: hollow-ware herein described, no claim being made for any one part taken separately
but only when used in combination, substantially in the manner and for the purpose
herein described.
.
In witness whereof, I, the said Thomas Henry Chatton, have hereunto set
my hand and seal, this Eighth day of January, in the year of our Lord
One thousand eight hundred and eighty one.
Witness,
BOOTH ASHWORTH COOPE
THOMAS HENRY CHATTON. (L.S.)