An Improved Aluminium Alloy.
Year: 1893

page_text: Date of Application, 17th Oct., 1893
Complete Specification Left,. 17th July, 1894-Accepted, 1st Sept., 1894
I, REINHARD ISIDOR ROMAN, of 110 Cannon Street, in the City and County of
London, Chemist, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved aluminium alloy which while retaining the
5 properties of aluminium so far as regards weight ductibility and resistance to
oxidation has such increased strength as will permit of its use as a substitute for
iron or steel.
I do not bind myself to these exact proportions as they may be varied within
3 certain limits according to the alloy required.
I may substitute manganese or nickel for either the copper, the tin, or the
antimony, using the same proportion as the metal for which it is substituted.
The metals are mixed in the order in which they are given, a small quantity of
aluminium being added with each successive metal to act as a flux and facilitate its
admixture.
When all the metals have been added and well mixed, the alloy is brought to a
blood or claret colour, when it is well cleared and poured slowly into well-heated
chills or moulds.
Date: 171 1
1000
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
0, Chancery Lane, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improved Aluminium Alloy.
I, REINHARD ISIDOR ROMAN, of 110 Cannon Street, in the City and County of
London, Chemist, 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 :-
My invention relates to an improved aluminium alloy which while retaining the
properties of aluminium as far as regards weight, colour, ductibility, and resistance
to oxidation, has such increased resistance as will permit of its use in many cases as
a substitute for irou or steel. The metal can be rolled, forged, stamped, spun,
turued, planed, filed, chased, punched, embossed and drawn.

page_text: I
may substitute manganese or nickel for either the tin, or the antimony using
the same proportions thereof as the metal for which it is substituted.
I manufacture my improved alloy in the following manner :-I have discovered
that tungstic acid mixed in different proportions with pure cryolite (the best
proportions to my knowledge being half and half) are easily melted together.
In the beginning of these operations cryolite acts only as a flux, but when the bath
is sufficiently fluid the heat is raised to about 1200% Celsius, and a quantity of
aluminium added such as will produce a 10% compound of aluminium, the cryolite
becomes a reducing agent and the tungstic acid is reduced to metallic tungsten
which easily alloys with the aluminium decomposing only a very small proportion
of the cryolite. Great attention must be paid to the temperature which must be
maintained at the same point until the process is finished. I then alloy a
determined quantity of aluminium with an equal quantity of electrolytic copper.
I then melt these two alloys (aluminium and tungsten and aluminium and copper)
together with pure aluminium in such proportions (with the tin and antimony or
their substitute added) that the alloy will contain not less than 94 to 98 per cent. of
-pure aluminium.
As the tin and antimony or their substitutes are only used for refining purposes
they may be omitted when the tungstic acid and the copper are chemically pure.
I do not limit myself. to the exact proportions, of the various metals forming my
improved alloy as they may be varied within certain limits according to the alloy
required.
* 1
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 1
claim is :-
+
1. The improved aluminium alloy manufactured as hereinbefore set forth.
2. An aluminium alloy consisting of copper, wolfram, aluminium, tin and
antimony (for either of the two latter of which manganese or nickel may be
substituted), as hereinbefore set forth.
3. The improved aluminium alloy composed of aluminium, copper and wolfram,
as hereinbefore set forth.
as nereinberore set forth.
Dated this 17th day of July 1894.
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.