IMPROVEMENTS IN CASTING STEEL
Year: 1885

page_text: I, THOMAS GILMOUR of Kilcattan Tile Works, in the County of Bute North
Britain, Tile Manufacturer, do hereby declare the nature of my said invention
for "IMPROVEMENTS IN CASTING STEEL" to be as follows, that is to say:
My said Invention has for its object to obtain sounder ingots or other castings of
steel, by diminishing or preventing the formation of cavities or honeycombing in
the metal; and my Invention consists in subjecting the mould with the steel
in it to concussive action whilst the steel is in a melted state and setting.
My Invention may be carried out by employing a support for the mould which
by suitable apparatus is made to repeatedly lift the mould and drop it through a
short distance. For this purpose a platform may be used having below it a set of
cams on rotating shafts, which cams repeatedly raise it and drop it as required; or
arrangements may be made for suspending the mould or its support from overhead
mechanism which will repeatedly hoist up and allow it to drop through a short
distance. In carrying out the Invention it will be desirable to have the mould
of sufficient strength, by being bound with iron hoops or encased in an outer
iron shell, to resist the increased internal pressure which will be caused by the
concussive action.
Dated this twenty-sixth day of February 1885
EDMUND HUNT,
Applicant's Agent.

page_text: I, THOMAS GILMOUR, of Kilcattan Tile Works, in the County of Bute, North
Britain, Tile Manufacturer, 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 :-
My said Invention has for its object to obtain sounder ingots or other castings
of steel by diminishing or preventing the formation of cavities or honeycombing
in the metal and my Invention consists in subjecting the mould with the steel
in it to concussive action whilst the steel is in a melted state and setting. The
concussive action has the effect of promoting the ejection of any gas contained. in
cavities in the metal and at the same time of consolidating the metal by forcing the
particles into close contact.
My Invention may be practically carried out by employing apparatus of the
kind shown on an accompanying sheet of explanatory drawings on which sheet
figures 1, and 2, are vertical sections as at right angles to each other. This
apparatus is made to repeatedly lift each mould and drop it through a short
distance thus imparting the desired concussive action. A massive fixed platform, A,
is provided and is formed with guide sockets, B, for pedestals, C, formed each on
the underside of a table, D, on which a mould, E, is placed. Below the platform,,A,
there is carried in suitable bearings a horizontal rotating shaft, G, driven by any
suitable prime mover, and having on it cams, H, placed so as to act on the lower
ends of the pedestals, C. As the shaft, G, rotates its cams, H, lift up the tables, D,
and moulds, E, and let them drop a short distance.
According to another modification arrangements may be made for suspending
each mould or a set of moulds or its support from overhead mechanism which will
repeatedly hoist it up and allow it to drop through a short distance. In carrying
out my Invention it will be desirable to have the mould of sufficient strength, by
being bound with iron hoops or encased in an outer iron shell, to resist the increased
internal pressure which will be caused by the concussive action.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that
what I claim is
Subjecting a mould in which steel is being cast to concussive action whilst the
steel is in a melted state and setting, substantially as hereinbefore described.
Dated this twenty-fourth day of November 1885