Improvements in Alloys of Manganese with other Metals.
Year: 1894

page_text: Date of Application, 20th Dec., 1894
Complete Specification Left, 21st Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
Improvements in Alloys of Manganese with other Metals.
We, JOHN FENWICK ALLEN, Chemist and Metallurgist and JOHN BROCK,
Director of The United Alkali Company, Limited, both of G 11 Exchange
Buildings Liverpool in the County of Lancaster, do hereby declare the nature of
this invention to be as follows:-
This invention has for its object improving alloys of manganese with copper or
other metals for which purpose we add aluminium to the said alloys as we find that
it has the effect of closing the grain and making castings formed therefrom more
sound than is otherwise the case and also increases the tensile strength and hardness
of the alloy.
The amount of aluminium should be varied according to the amount of manganese
contained in the alloy and also according to the purpose for which the alloy is to be
employed. Suitable alloys are such as contain from one half to ten per cent. of
manganese and from one eighth to five per cent. of aluminium and various proportions
of copper and tin, or copper and zinc, or copper tin and zinc.
Dated this 20th day of December 1894.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Alloys of Manganese with other Metals.
We, JOHN FENWICK ALLEN, Chemist and Metallurgist and JOHN BROCK,
Director of The United Alkali Company Limited both of G 11 Exchange
Buildings Liverpool, in the County of Lancaster, 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 has for its object improving alloys of manganese with copper or
other metals for which purpose we add aluminium to the said alloys as we find that
it has the effect of closing the grain and making the castings formed therefrom
more sound than is otherwise the case and also increases the tensile strength and
hardness of the alloy.
The amount of aluminium should be varied according to the amount of manganese
contained in the alloy and also according to the purpose for which the alloy is to be
employed.
Suitable alloys are such as contain from one half to ten per cent. of manganese
and from one eighth to five per cent. of aluminium and various proportions of copper
and tin, or copper and zinc, or copper, tin and zinc.
This invention may be carried into effect as follows. We first prepare alloys of
copper and manganese for example, by the process described in the Specification of
Letters Patent No. 8712 of 1894. To the alloy so prepared we add the other
metals, that is, copper, zinc, tin, or any two of them, or all the three, in the
necessary proportions so as to reduce the contents of manganese to from one and a
half to ten per cent.

page_text: We find for general purposes from three to six per cent. of manganese advantageous.
To these alloys we then add from one half to one per cent. of aluminium.
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 :-
The manufacture and production of alloys by the addition of aluminium to alloys
of manganese such as alloys thereof with copper; or with copper and tin; or with
copper and zinc; or with copper, tin, and zinc, substantially as and for the
purposes described.
Dated the 21st day of August 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.