provements in the Manufacture of Depolarizers for Electric Batteries
Year: 1888

page_text: PROVISIONAL SPECIFICATION
Improvements in the Manufacture of Depolarizers for Electric
Batteries
I MAURICE LEOLANOHE, of 1 Boulevard St Denis, Paris, France, Electrical
Engineer, do hereby declare the nature of this invention to be as follows
-
The object of my invention is to manufacture depolarizing agglomerate bodies
for electric batteries which are so porous that the battery liquid by penetrating the
pores shall have a very extensive contact with the active material whereby a more
rapid depolarization and the utilization of the whole mass of the depolarizer are
ensured
The invention consists essentially in the addition to the depolarizing body or mixture
before the same is moulded of a soluble material which is afterwards eliminated by
dissolving it It is evident that this material when dissolved out will leave fine
spaces or pores The dissolving out may be effected either by water or by the battery
liquid
Many soluble materials will answer the purpose of the invention, the following may
be named as examples -Sulphate of potass, sulphate of soda, sulphate of ammonia,
chloride of potassium, chloride of sodium, chloride of ammonium, brown sugar
Only such substances should be used as will not attack the depolarizing material
whether this be peroxide of manganese, which is particularly suitable, oxide of copper
or other depolarizer
I will give by way of example 2 compositions which answer well

page_text: After compression in moulds of appropriate form and after having heated the
mixture until the pitch begins to melt in order to agglomerate the mass the
carbonate of potassa is dissolved out in water and a manganese depolarizing
agglomerate body is obtained which is very porous and will add greatly to the
efficiency of a Leclanché battery
5
The sulphate of copper is eliminated by dissolving out
If I wish to form a Leclanche element having chloride of ammonium as the exciting
salt I can employ this body to produce the pores and not dissolve it out previously
It will dissolve out when in the battery
Dated this 7th day of June 1888
1

page_text: COMPLETE SPECIFICATION
Improvements in the Manufacture of Depolarizers for Electric
Batteries
I, MAURIOE LEOLANOHÉ of 1 Boulevard St Denis, Paris, France, Electrical
Engineer, 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
-
The object of my invention is to manufacture depolarizing agglomerate bodies for
electric batteries which are so porous that the battery liquid by penetrating the pores
shall have a very extensive contact with the active material whereby a more rapid
depolarization and the utilization of the whole mass of the depolarizer are ensured
The invention consists essentially in the addition to the depolarizing body or mixture
before the same is moulded of a soluble pulverulent material which is afterwards
eliminated by dissolving it It is evident that this material when dissolved out will
leave fine spaces or pores
The dissolving out may be effected either by water or by
the battery liquid
Many soluble materials will answer the purpose of the invention, the following may
be named as examples -Sulphate of potass, sulphate of soda, sulphate of ammonia,
chloride of potassium, chloride of sodium, chloride of ammonium, brown sugar
Only such substances should be used as will not attack the depolarızıng material,
whether this be peroxide of manganese, which is particularly suitable, oxide of copper
or other depolarizer
I will give by way of example two compositions which answer well
"
100 grammes
After compression in moulds of appropriate form and after having heated the
mixture until the pitch begins to melt in order to agglomerate the mass the carbonate
of potassa is dissolved out in water and a manganese depolarizing agglomerate body
is obtained which is very porous and will add greatly to the efficiency of a Leclanché
battery
After compression in moulds of appropriate form and after having heated the
mixture until the pitch begins to melt in order to agglomerate the mass the carbonate
of potassa is dissolved out in water and a manganese depolarizing agglomerate body
is obtained which is very porous and will add greatly to the efficiency of a Leclanché
battery

page_text: The sulphate of copper is eliminated by dissolving out
If I wish to form a Leclanché element having chloride of ammonium as the exciting
salt I can employ this body to produce the pores and not dissolve it out previously
It will dissolve out when in the battery
Having now particularly described and ascertained the nature of my said inven-
hion and in what manner the same is to be performed I declare that what
I claim is.—
In the manufacture of depolarizers for electric batteries the addition to and moulding
with the depolarızıng body or mixture of a soluble material which is afterwards
eliminated by dissolving it in water or which will be dissolved out by the battery
liquid, whereby fine spaces or pores are produced in the depolarizing body,
substantially as and for the purpose set forth
Dated this 21st day of January 1889
JC MEWBURN,
55 & 56, Chancery Lane, London,
Patent Agent