Improvements in the Apparatus or Plant for Moulding and Casting Baths, Tanks, and such like Castings.
Year: 1889

page_text: Date of Application, 21st Mar., 1889
Complete Specification Left, 21st Dec., 1889-Accepted, 15th Feb., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Apparatus or Plant for Moulding and Casting
Baths, Tanks, and such like Castings.
ALEXANDER HUTCHISON Ironfounder 48 Addington Road Bow London E. do
hereby declare the nature of this invention to be as follows:-
Improvements in apparatus for moulding and casting Baths, Tanks, and such like
castings. For this purpose I employ a moulding box constructed in three or more
parts, the bottom part of the box is so made as to carry and support a light shell made
of cast iron or any other suitable material, somewhat near the shape of the inner part
of the pattern of the bath, tank, or such like model, and over which the model or
pattern is placed, and at a suitable distance from the same between which the sand is
rammed; This bottom part of the box is made to fit internally into the middle part
of the box so that same can be moved parallel as may be desired when the contraction
takes place and also to allow for the contraction this shell is supported on cams fixed
on spindles, which on being turned will the allow the shell to drop as may be desired
after the mould is cast.
:
The pattern is made open at the top, and fitted with a loose piece so that the sand
can be rammed between the shell and the pattern to form part of the mould; the
middle part of the box is attached to the bottom part and outside the pattern or
nodel and at a suitable distance for the sand to be rammed between same, and carried
up near or thereabouts to the level of the pattern or model. The top part of the box
is then attached and fitted to same at a suitable distance from the pattern for the
purpose of filling and ramming up the sand to complete the mould.
The shell is made with a series of holes in same for the purpose of allowing the air
or gas to escape from the mould.
Dated this D1st day of March 1980
J. POWLES WEST.
For A. Hutchison.
COMPLETE SPECIFICATION.
Improvements in the Apparatus or Plant for Moulding and Casting
Baths, Tanks, and such like Castings.
I ALEXANDER HUTCHISON Ironfounder 48 Addington Road Bow London, E. 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:-
The object of my invention is to so construct a mould for casting Baths, Tanks and
the like in such a manner as to allow of the contraction when cooling without any
undue resistance being opposed to same by the mould, and whereby 1 ain enabled to
save labor, time, & material used as in the ordinary manner of moulding and casting
same.
In carrying out my invention, I employ a moulding box that is made of two, three
or more parts or boxes, placed one upon the other, and held in position in the ordinary
manner, the bottom part or box is open, and is made to receive a shell supported upon
cams, mounted on shafts or spindles working in suitable bearings.
In order that my invention may be more fully understood, I have appended the
accompanying sheet of Drawings in which,
Fig. 1 is a side sectional view:
Ti and

page_text: Supposing a Bath or Tank is to be cast: the pattern A is placed in the position
shewn at Figs. 1 & 2 over the shell B which is of similar shape: between the
pattern A and shell B the sand is rammed through the opening G of the pattern A:
the top box D is fitted upon the middle box E and the hole C of the pattern A
is closed by a loose fitting piece: the sand is now rammed into the top box, and
when the mould is completed it only remains to extract the pattern in the usual
manner and pour in the molten metal.
And to allow for the contraction in same; after the casting has set I turn the
spindles F, F, and lower the cams G, G, and with it the shell B, which as will bo
on account of its shape will recede from every part of the mould so that
only the resistance offered by the sand is opposed to the shrinking of the casting ;
by this means I am enabled to produce much sounder work than by the ordinary
seen
method.
The shell B may be perforated to allow of the escape of air or gas from the
mould.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed I declare that what I
claim is:
The inner shell B removable from the mould substantially as and for the purpose
and in the manner described.