Improvements in Making Chilled Castings.
Year: 1895

page_text: Date of Application, 13th Mar., 1895
Complete Specification Left, 10th Dec., 1895-Accepted. 18th Jan.. 1896.
PROVISIONAL SPECIFICATION.
Improvements in Making Chilled Castings.
We, ROBERT CATANACH SMITH, and ANDREW BETTS BROWN, both of
Rosebank Foundry, Edinburgh, in the County of Mid Lothian, North Britain,
Engineers, do hereby declare the nature of this invention to be as follows, that is
to say:
Our said invention has for its object to obtain improved results when making
chilled castings of iron or like metal, and especially to prevent cracking of the
chilled parts.
Our invention is advantageously applicable for tramcar wheels or
other wheels or pulleys, and also to castings of various forms.
In carrying out our invention we employ, in the case of each mould, a reservoir
which is placed above the mould and has its bottom in communication with the
gate or gates of the mould. The gates are closed by plugs until the molten metal
to form the casting has been filled into the reservoir. The quantity of metal thus
put into the reservoir is made as nearly as conveniently possible just sufficient to
fill the mould and its gate or gates; and as soon as it has been filled in the plugs
are withdrawn and the metal is allowed to run into the mould, its velocity
depending on the head of molten metal in the reservoir and being considerable at
the commencement but gradually diminishing as the mould fills. With the
described arrangements and procedure it is found that the castings are more.
perfect and that the chilled parts are without cracks.
Dated this Twelfth day of March 1895.
EDMUND HUNT,
Applicants' Agent.
Improvements in Making Chilled Castings.
We, ROBERT CATANACH SMITH, and ANDREW BETTS BROWN, both of
Rosebank Foundry, Edinburgh, in the County of Mid Lothian, North Britain,
Engineers, 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, that is to say :-
:-
Our said invention has for its object to obtain improved results when making
chilled castings of iron or like metal, and especially to prevent cracking of the
chilled parts. Our invention is advantageously applicable for tramcar wheels or
other wheels or pulleys of various forms.
In carrying out our invention we employ, in the case of each mould, a reservoir
which is placed above the mould and has its bottom in communication with the
gate or gates of the mould. The gates are closed by plugs until the molten metal
to form the casting has been filled into the reservoir, after which the plugs are
withdrawn.
And in order that our said invention and the manner of performing the same
may be properly understood we hereunto append an explanatory drawing to be
hereinafter referred to, and showing an example of our improved apparatus, in
vertical section.

page_text: We employ in the case of each mould, a reservoir, A, which is placed above the
mould, B, and has its bottom in communication with the gate or gates, C, of the
mould. The gates, C, are closed by plugs, D, until the molten metal to form
the casting has been filled into the reservoir, A. The quantity of metal thus put
into the reservoir, A, is made as nearly as conveniently possible just sufficient to
fill the mould, B, and its gate or gates, C; and as soon as it has been filled in the
plugs, D, are withdrawn, and the metal is allowed to run into the mould, its
velocity depending on the head of molten metal in the reservoir and being
considerable at the commencement but gradually diminishing as the mould fills.
With the described arrangements and procedure it is found that the castings are
more perfect and that the chilled parts are without cracks.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In making chilled castings the use of a reservoir, placed above the mould, to
receive the quantity of molten metal required to fill the mould prior to admitting
the said metal into the mould, substantially as and for the purposes hereinbefore
described.
Dated this Ninth day of December 1895
EDMUND HUNT,
Applicants' Agent.