IMPROVEMENTS IN THE PRODUCTION OF YELLOW METAL, PARTLY APPLICABLE ALSO TO THE FOUNDING OF BRASS AND BRONZE GENERALLY
Year: 1884

page_text: I, THOMAS PARKER, of Commercial Road, Wolverhampton in the County of
Stafford, electrical, engineer, do hereby declare the nature of my invention for
IMPROVEMENTS IN THE PRODUCTION OF YELLOW METAL, PARTLY APPLICABLE
ALSO TO THE FOUNDING OF BRASS AND BRONZE GENERALLY, to be as follows
The chief object of this invention is to produce economically a yellow metal
which shall have great tensile and compressive strength and hardness.
This object is effected by melting and mixing, in the ordinary manner of brass-
founding, the following metals and compound metal or ingredients in the proportions
(approximately) by weight as stated opposite to them respectively, namely:-
Copper
Spelter dross
Spelter
Tin I
50 parts
25 to 30 parts
-
-
12 to 17 parts
1/2 to 2 parts
The chief feature in the production of the yellow metal thus produced, is the
employment of the spelter dross. I have discovered that spelter dross contains
iron in composition with the spelter in a form which renders it specially fitted to
give great strength and hardness to the metal produced as described.
In producing the above-described compound metal I employ as a flux the
following ingredients mixed together into a paste in the proportions, by weight,
as stated opposite to them respectively, namely,
Sulphate of soda (salt-cake)
5 parts.
Coal dust
Silica
Bone aslı
5 parts.
15 parts
20 parts
Sulphate of manganese or of copper, or the chlorides of these, and also common
salt, may be used in place of the sulphate of soda; and sawdust, or any suitablo
description of carbonaceous matter may be employed in place of the coal dust.
This flux is applicable also to the founding of brass and bronze generally.
Dated this tenth day of January 1884

page_text: I, THOMAS PARKER, of Commercial Road, Wolverhampton, in the County of
Stafford, electrical engineer, do hereby declare the nature of my invention for
IMPROVEMENTS IN THE PRODUCTION OF YELLOW METAL, PARTLY APPLICABLE
ALSO TO THE FOUNDING OF BRASS AND BRONZE GENERALLY, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The chief object of this invention is to produce economically a yellow metal
which shall have great tensile and compressive strength and hardness.
This object is effected, according to this invention, by melting and mixing, in
the ordinary manner of brass founding, the following metals and compound metal
or ingredients, in the proportions (approximately), by weight, as stated opposite to
them respectively, namely:-
to employ as a flux the following ingredients mixed together into a paste in the
proportions (approximately), by weight, as stated opposite to them respectively,
namely:-
Sulphate of soda (salt cake)
Coal dust
Silica
-
-
5 parts.
5 parts.
•
15 parts.
20 parts.
Bone ash
-
Sulphate of manganese or of copper, or the chlorides of these, or common salt,
may be used in place of tho sulphate of soda, and saw dust or any suitable descrip-
tion of carbonaceous matter may be employed in place of the coal dust.
In producing the above described compound metal in a crucible, I prefer to
modify the above flux by first treating the bone ash with sulphuric acid so as
to produce phosphate of calcium (phosphate of lime) and also Plastor of Paris,
which latter is removed as being objectionable, and to the phosphate of calcium
I add the carbonaceous matter and silica, mixing the whole into a paste before
putting into the crucible.
"When the flux is formed in the manner last described, sulphate of soda is, of
course, not required, as the sulphuric acid employed in the latter case acts in lieu
of the sulphuric acid in the sulphate of soda in the former case.
The flux above described, whether for the larger-quantities of metal, or for
employment in the crucible, as the case may be, is applicable also to the founding
of brass and bronze generally.
The modification of the flux described specially for employment in a crucible
may be employed also in the case of larger quantities of metal, but this is not
recommended as this flux is more expensive than that first described, and slag,
which results from the employment of the first described flux, though objectionable
in the crucible, is useful in the case of larger quantities of metal.

page_text: ving now stated the nature of my said invention and particularly described
ascertained the manner of performing the same, I declare that what I claim,
The yellow metal composed of the ingredients heroinbefore named, in,
mately, the proportions stated, substantially as and for the purpose herein
ed.
e flux for employment in founding the above described compound metal,
founding brass and bronze generally, such flux being composed of the
nts herein described, in, approximately, the proportions stated, and
to either of the modifications thereof described, and including also the
ion, for any of the ingredients named, of any well known chemical
nts therefor.