IMPROVEMENTS IN VOLTAIC BATTERIES
Year: 1885

page_text: I ALFRED ROSLING BENNETT of 84 Royal Exchange Buildings Glasgow in the
County of Lanark Telegraph Engineer do hereby declare the nature of my
invention for IMPROVEMENTS IN VOLTAIC BATTERIES to be as follows:-
1882
1882
With the object of increasing the constancy of the current produced by the
various forms of voltaic batteries described and claimed in my patents No 302
21st Jan and No 1901 21st Apl I employ in conjunction with the chemicals therein
set forth metallic sulphides more particularly the various sulphides of iron and
copper and the joint sulphides of iron and copper The sulphides may be used
separately or mixed together. They may likewise be used combined with various
proportions of sulphur such as in the form of the compound known as Spence's
metal" which is a mixture of pulverized metallic sulphides with melted sulphur.
The sulphides or mixtures of sulphides and sulphur are used with the negative
portion of the battery. They are mixed with the iron or other metallic borings or
filings or are made to cover or surround the negative plate of iron or other metal
which need not in such a case be packed with borings filings or other pieces of
metal.
"
In addition to the metals set forth in the patents aforesaid as being proper for
employment as negative plates when the metallic sulphides or mixtures of metallic
sulphides with sulphur are employed negative plates of any other metal may be
used accompanied or not by pieces of the same or any other metal. A negative
plate of carbon may likewise be employed above or accompanied by pieces of
carbon or of any metal.
The solutions are the same as set forth in the aforesaid patents, namely caustic
potash or caustic soda used separately or mixed with or without permanganate of
potash.
With metallic sulphides or mixtures of metallic sulphides with sulphur a porous
diaphragm to separate the positive from the negative portion of the battery as
described in the aforesaid patents is not needed.

page_text: I, ALFRED ROSLING BENNETT of 904 George Street in the City of Edinburgh,
Telegraph 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:-
With the object of increasing the constancy of the current produced by the
various forms of voltaic batteries described and claimed in the Specifications of
my Patents Nos 302 of 1882 and 1901 of 1882, I employ in conjunction with
the chemicals therein set forth metallic sulphides, more particularly the various
sulphides of iron and copper, and the joint sulphides of iron and copper.
The sulphides may be used separately or mixed together. They may likewise be
used combined with various proportions of sulphur such as in the compound known
as 'Spence's Metal" which is a mixture of pulverised metallic sulphides with
melted sulphur.
"
The sulphides or mixture of sulphides and sulphur are used with the negative
portion of the battery. They are mixed with the iron or other metallic borings or
filings or are made to cover or surround the negative plate of iron or other metal,
which need not in such a case be packed with borings, filings, or other pieces of
metal..
In addition to the metals set forth in the Specifications of the Patents aforesaid
as being proper for employment as negative plates, when the metallic sulphides or
mixtures of metallic sulphides with sulphur are employed negative plates of any
other metal may be used, accompanied or not by pieces of the same, or any other
metal. A negative plate of carbon may likewise be employed, alone, or accom-
panied by pieces of carbon or of any metal.
The solutions are the same as set forth in the Specifications of the aforesaid
Patents, namely, caustic potash, or caustic soda, used separately or mixed, with or
without permanganate of potash.
With metallic sulphides, or mixture of metallic sulphides with sulphur, a porous
diaphragm to separate the positive from the negative portions of the battery as
described in the aforesaid Specifications is not essential but may nevertheless
be used.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
In voltaic batteries of the kind herein before referred to, the employment in the
negative portion of the battery of metallic sulphides or alloys of metallic sulphides
with sulphur substantially as and for the purpose set forth.