Improvements in Aluminium Compounds, and Means for Producing the same.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Aluminium Compounds, and Means for Producing
the same.
°
I, REINHARD ISIDORE ROMAN of 31 Lombard Street, in the City of London,
Chemist and Metallurgist, do hereby declare the nature of this invention to be as
follows
:-
The object of this invention is to manufacture an aluminium compound which
bears similar relations to aluminium as steel bears to iron. In the manufacture of
this new aluminium compound I carburate aluminium either without the introduction
of any foreign metals or in conjunction with foreign metals.
In carrying out my invention I introduce into or incorporate with aluminium in
a fused or liquid state a small percentage of calcium carbide taking care that the
calcium carbide does not come in contact with the air. After the calcium carbide
and aluminium are combined I then proceed to eliminate the calcium; this may be
effected by introducing into the melt an aluminium alloy.
By way of example I take ninety-nine per cent. of aluminium and one per cent. of
calcium carbide. beat the aluminium in a suitable crucible and as soon as the
aluminium is liquefied I introduce therein one per cent. of calcium carbide which I
open air.
encase in an aluminium cartridge so as to prevent any contact with the
This calcium carbide is plunged under the surface of the aluminium.
After a period of about two minutes there is a considerable rise in temperature ;
and when the temperature goes down the reaction is complete.
I keep the metal continuously stirred up taking care to change the stirrer so as
I then add an aluminium alloy
to prevent any of the iron going into the metal.
preferably containing three and one-third per cent. of nickel, three and one-third
per cent. wolfram and ninety-three and one-third per cent. aluminium.
When the bath is entirely liquid and no lumps can be felt in the crucible I
pour it out when the calcium, silicon and iron form a slack and remain at the
bottom of the pot.
I produce by this means a new metallic compound which has considerable
hardness and possesses great elasticity; and has a melting point considerably
lower than aluminium.
An analysis of some of the aluminium compounds which I have produced shews
that the percentage of carbon may be as little as one-tenth per cent. but in the
manufacture of carburetted aluminium I do not limit myself to this percentage.
Dated this 16th day of September 1895.
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents..

page_text: Improvements in Aluminium Compounds, and Means for Producing
the same.
I, REINHARD ISIDORE ROMAN of 31 Lombard Street in the City of London,
Chemist and Metallurgist, 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 :—
This invention consists in the manufacture of new aluminium compounds which
bear relations to aluminium similar to those that steel bears to iron. In the
manufacture of these new aluminium compounds I carburate aluminium or an
aluminium alloy either without the introduction of any foreign metals or in
conjunction with foreign metals.
After
The manner in which my invention may be carried out is as follows:-I
introduce into or incorporate with aluminium or an aluminium alloy in a fused or
liquid state a small percentage of a carbide of one of the alkaline earths preferably
calcium taking care that the carbide does not come in contact with the air.
the carbide and aluminium have combined I then proceed to eliminate the calcium.
or alkaline earth; this may be effected by introducing into the melt an aluminium
alloy.
By way of example I take 99 per cent. of aluminium and one per cent. of calcium
carbide. I heat the aluminium in a suitable crucible and as soon as the aluminium
is liquefied I introduce therein the calcium carbide which I encase in an aluminium
cartridge so as to prevent any contact with the open air. This calcium carbide is
plunged under the surface of the aluminium.
After a period of about 2 minutes there is a considerable rise in temperature ;
and when the temperature goes down the re-action is complete.
I keep the metal continuously stirred up taking care to change the stirrer so as
to prevent any of the iron going into the metal. I then add an aluminium alloy
preferably containing 3 per cent. of nickel 3 per cent. wolfram and 93 per cent.
aluminium. The proportion of the aluminium alloy which I add to the aluminium
carbide is about 16 parts of alloy to 84 parts of aluminium carbide.
When the bath is entirely liquid and no lumps can be felt in the crucible I pour
it out, when the calcium with any silicon and iron that may have been in the
aluminium and the wolfram or other ingredients form a slack and remain at the
bottom of the pot.
I produce by this means a new metallic compound which has considerable
hardness, possesses great elasticity and mechanical resistance.
An analysis of some of the aluminium compounds which I have produced
according to this invention shews that the percentage of carbon may be as little
as one-tenth per cent. but in the manufacture of carburetted aluminium or carburetted
aluminium alloys I do not limit myself to this percentage as it may be as high
1 per cent.
as
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 I
claim is :-
:-
1. The new aluminium compounds hereinbefore described namely carburetted
aluminium and a
11

page_text: 2. The process of carburizing aluminium and aluminium alloys by the use of
carbide of calcium or of other alkaline earth, substantially as described.
Dated this 15th day of June 1896.
J. C. MEWBURN & ELLIS,
55 and 56 Chancery Lane, London, Chartered Patent Agents.