Year: 1887

page_text: I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the City of
London, Civil Engineer and Patent Agent, do hereby declare the nature of this
invention (as communicated to me from abroad by Philippe Jules Grouvelle, of 71,
Rue du Moulin Vert, Paris, in the Republic of France, Engineer,) to be as follows:-
This invention relates to the manufacture of "iron-cement "-sometimes known as
"rust-cement "for jointing metallic bodies; the improved cement being specially
adapted for use where heat or cold has to be transmitted from one body to another
through a joint made with cement of this description.
Iron-cement prepared in the ordinary manner usually consists of a mixture of cast
iron filings, sal ammoniac and water, sulphur being sometimes added. A composition
of this nature is only suitable for use in a comparatively even temperature and in an
atmosphere not supercharged with moisture; for, under the influence of heat or
moisture, cement of this kind is apt to expand and will sometimes even cause the
joints in which it is used to burst. Another composition of iron-cement, commonly
employed where undue expansion thereof might involve danger, consists of cast iron
filings with acetic acid and water; heat or moisture having no effect on cement of
this kind.
For use under certain conditions, an iron-cement is sometimes required that will
not only serve as a material for filling a joint and rendering the same tight, but which
will remain unaffected by high temperatures and will at the same time act as a good
conductor of heat. Iron-cement possessing these qualities is specially applicable,
for example, in the construction of heating apparatus of the kind described in the
Specification to my Letters Patent dated 13 June, 1885, No. 7242.
In prepar

page_text: iron-cement according to the present invention, filings from metals or metallic alloys
known to be better conductors of heat than cast iron are added to the ingredients
before alluded to; filings of copper or of cupreous alloys being particularly suitable.
Such filings, when added to the other ingredients, even if they do not assist, do not
injuriously affect the cohesive properties of the mixture, as has been amply
demonstrated by experiment.
The following composition is one that has in practice yielded excellent results;
both as regards its heat conducting properties, and the solidity of the joints constructed
therewith-By weight, 62 parts of cast iron filings, 32 parts of gun-metal filings
and 6 parts of a 4 per cent.-solution of crystallizable acetic acid, pure water being
added in small quantities, as required, in order to keep the mixture moist. This
preparation should not be used until it has become warm. Copper filings may be
substituted for the gun-metal filings in the above composition; or a portion of the
copper may be added in the form of acetate of copper.

page_text: :
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the City of
London, Civil Engineer and Patent Agent, do hereby declare the nature of this
invention (as communicated to me from abroad by Philippe Jules Grouvelle, of 71,
Rue du Moulin Vert, Paris, in the Republic of France, Engineer,) and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
6
This invention relates to the manufacture of iron-cement '-sometimes known as
'rust-cement '-for joining metallic bodies; the improved cement being specially
adapted for use where heat or cold has to be transmitted from one body to another
through a joint made with cement of this description.
Iron-cement prepared in the ordinary manner usually consists of a mixture of cast
iron filings, sal-ammoniac and water, sulphur being sometimes added. A composition
of this nature is only suitable for use in a comparatively even temperature and in an
atmosphere not supercharged with moisture; for under the influence of heat or
moisture, cement of this kind is apt to expand and will sometimes even cause
the joints in which it is used to burst. Another composition of iron-cement,
commonly, employed where undue expansion thereof might involve danger, consists of
cast-iron filings with acetic acid and water; heat or moisture having no effect on
cement of this kind.
.
For use under certain conditions, an iron-cement is sometimes required that will
not only serve as a material for filling a joint and rendering the same tight, but which
will remain unaffected by high temperatures and will at the same time act as a good
conductor of heat. Iron-cement possessing these qualities is specially applicable, for
example, in the construction of heating apparatus of the kind described in the
specification to my Letters Patent dated 13th June, 1885, No. 7242. In preparing
iron-cement according to the present invention, filings from metals or metallic alloys
known to be better conductors of heat than cast iron are added to the ingredients
before alluded to; filings of copper or of cupreous alloys being particularly suitable.
Such filings, when added to the other ingredients, even if they do not assist, do
not injuriously affect the cohesive properties of the mixture, as has been amply
demonstrated by experiment.
The following composition is one that has in practice yielded excellent results;
both as regards its heat-conducting properties, and the solidity of the joints constructed
therewith:-By weight, 62 parts of cast iron filings, 32 parts of gun-metal filings
and six parts of a 4 per cent. solution of crystallizable acetic acid, pure water being added

page_text: in small quantities as required, in order to keep the mixture moist. This preparation
should not be used until it has become warm. Copper filings may be substituted for
the gun-metal filings in the above composition; or a portion of the copper may be
added in the form of acetate of copper.
Having thus particularly described and ascertained the nature of this invention as
communicated to me by my foreign correspondent and in what manner the same is to
be performed, I claim :—
1. In the manfacture of what is known as 'iron cement,' the employment, in a
state of fine subdivision, of metals or alloys possessing superior heat-conducting
qualities substantially as and for the purposes herein described.
2. The improved 'iron cement' compounded of cast iron filings and gun metal
filings with a solution of crystallizable acetic acid, substantially in the proportions
herein specified.