IMPROVEMENTS IN MAKING MOULDS FOR CASTING BATHS, CISTERNS, AND SIMILAR ARTICLES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We, JOHN SHANKS, Sanitary Engineer, and WILLIAM DENNISON, Foreman
Moulder, both of Tubal Foundry, Barrhead, in the County of Ronfrew, North
Britain, do hereby declare the nature of our said invention for
"IMPROVEMENTS IN
MAKING MOULDS FOR CASTING BATHS, CISTERNS, AND SIMILAR ARTICLES" to be as
follows:-
Our said Invention has for its object to economise time and labor and to obtain
improved results in making moulds for casting baths, cisterns, and similar articles.
Our improvements are applicable in making moulds of various sizes, but are
specially designed for advantageous use in moulding large articles like baths.
Instead of, as is hitherto commonly practised, inoulding both the external and
internal surfaces of the bath upon the outer and inner sides of one and the same
pattern, which pattern in itself represents a bath in its thickness as well as in its
form, we use separate patterns for the external and internal surfaces The external
pattern, which is by preference of castiron, has formed on or fixed to it a flat flange
which forms the bottom of the flask or part mould box within which the sand is
rammed upon the pattern, the pattern being in an inverted position. The part of
the flange within the flask gives shape to the parting surface of the mould, and is
so combined with the actual pattern part as to determine the thickness of the
metal of which the bath is to be cast. The flask is separate from the flange of the
pattern, and its proper position thereon is determined by pins and guide eyes and
by special guiding and sliding parts. When the sand has been rammed upon the
pattern and within the flask, an upper flask of a shallow form and made with cross
bars is placed in position and rammed up; and then the whole is turned over, the
upper flask becoming the bottom support, and the pattern is lifted out.
The interior pattern is also made with a horizontal flange the inner part of
which shapes the parting. The sand is rammed within the pattern, no surrounding
flask being required, and an upper shallow barred flask is next placed on and
rammed up. The whole is then turned over the upper flask becoming the bottom
support, and the pattern is lifted off. With this improved arrangement both parts
of the mould can be finished at the same time, whereas with the ordinary system
the finishing of one part cannot be commenced until that of the other part has been
done. Our improved arrangements are especially advantageous where a number
of baths or similar articles of the same pattern have to be cast at the same time;
as a number of moulds can be in various stages of preparation at the same time.
1001
EDMUND HUNT,
Applicants' Agent.

page_text: We, JOHN SHANKS, Sanitary Engineer, and WILLIAM DENNISON, Foreman
Moulder, both of Tubal Foundry, Barrhead, in the County of Renfrew North
Britain, do hereby declare the nature of our said invention for "IMPROVEMENTS
IN MAKING MOULDS FOR CASTING BATHS, CISTERNS, AND SIMILAR ARTICLES and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say:-
"
Our said Invention has for its object to economise time and labor and to obtain
improved results in making moulds for casting baths, cisterns, and similar articles.
Our improvements are applicable in making moulds of various sizes, but are
specially designed for advantageous use in moulding large articles like baths.
Instead of, as hitherto commonly practised, moulding both the external and
internal surfaces of the bath upon the outer and inner sides of one and the same
pattern, which pattern in itself represents a bath in its thickness as well as in its
form, we use separate patterns for the external and internal surfaces, such patterns
being arranged and combined with other parts, and used as hereinafter described
with the aid of a sheet of explanatory drawings which is hereunto appended.
Figure, 1, on the accompanying sheet of drawings is a plan of the combination
of boxes or flasks and the pattern in and on which the mould for the external
surface of the bath is to be formed; and figures, 2 and 4, are elevations of the
opposite ends, whilst figure, 3, shows the mould formed and in section with the
pattern and its frame in side olevation. Figures, 5, to 8, are similar views of the
parts in which the mould for the internal surface of the bath is formed. Figure, 9,
is a side elevation of the mould or core for the inside of the bath and figure, 10, is
a side elevation of the completed mould ready for casting. In these drawings the
same reference numerals are used to mark the same or like parts wherever they are
repeated.
The external pattern, 11, which is by preference of castiron is formed in the
same piece with or fixed to a flat flange, 12, which is made with a shallow
frame, 13, and forms the bottom of the flask or part mould box, 14, within which
the sand is rammed upon the pattern, the pattern being in an inverted position.
The part of the flange, 12, within the flask, 14, gives shape to the parting surface
of the mould, and is so combined with the actual pattern part as to determine the
thickness of the metal of which the bath is to be cast at the rim. The flask, 14, is
separate from the flange, 12, and its frame, 13, and its proper position thereon is
determined by the usual pins, 15, and guide eyes or notched lugs, and by special
guiding and sliding parts. These special parts consist of accurately fitted vertical
bars, 10, fixed to the bottom frame, 13, and grooves accurately formed in pro-
jections, 17, formed for the purpose on the lower parts of the ends of the flask, 14.
When the sand has been rammed upon the pattern, 11, and within the flask, 14,
an upper flask, 18, of a shallow form and made with cross bars is placed in position
and rammed up; or the whole of the ramming may be done after the upper
flask, 18, has been placed in position. The whole is then turned over, the upper
flask, 18, becoming the bottom support, and the pattern is lifted out. Trunnions, 19,
are fixed in the ends of the middle or main flask, 14, in the usual way to facilitate
the turning over of the mould.
The interior pattern, 20, figures, 5, and 7, is also made with a horizontal
flange, 21, one side of which shapes the parting. The sand is rammed within the
pattern, 20, and an upper shallow barred flask, 22, is placed above and rammed up.
No flask is required to retain sand at the outer sides or ends of this pattern, 20,

page_text: but the pattern is by preference formed with or is fixed in any convenient way to a
frame, 23, which supports it and which is provided with trunnions, 24, to facilitate
the turning over of this part of the mould. The upper flask, 22, has fixed to it
accurately fitted guide bars, 16, which engage in grooves accurately formed in
projections, 17, formed for the purpose on the frame, 23, or it may be on the
flange, 21, of the pattern, 20, itself.
When the ramming of the sand in the pattern 20, and upper flask, 22, has been
completed, the whole is turned over the upper flask, 22, becoming the bottom
support, and the pattern is lifted off leaving the core or part of the mould for the
interior of the bath as shown in figure, 9. The mould surfaces having been finished
in the usual way the flasks, 14 and 18, containing the part of the mould for the
exterior of the bath are raised and turned over again, and then carefully lowered
down upon the core part (figure 9) to combine the two parts as shown in figure, 10,
The guiding bars, 16, fixed to the supporting flask, 22, of the core part engage in
the grooved projections, 17, of the flask, 14, and insure the putting together of the
two parts of the mould in accurate relation to each other.
With our improved arrangements both parts of a mould can be finished at the
same time, whereas with the ordinary system the finishing of one part cannot be
commenced until that of the other part has been done. Our improved arrangements
are especially advantageous where a number of baths or similar articles of the same
pattern have to be cast at the same time; as a number of moulds can be in various
stages of preparation at the same time.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
The making of moulds for casting baths, cisterns, and similar articles, substantially
in the improved manner and by means of the apparatus herein before described.
Dated this eighth day of December 1884.
EDMUND HUNT,
Applicants' Agent.