Improvements in or connected with the Positive Elements (Negative Electrodes in Charging) of Secondary Batteries, which Elements are Applicable also as Cathodes in Electrolysis."
Year: 1890

page_text: Date of Application, 8th Mar., 1890
Complete Specification Left, 8th July, 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in or connected with the Positive Elements (Negative
Electrodes in Charging) of Secondary Batteries, which Elements
are Applicable also as Cathodes in Electrolysis."
We, THE MINING AND GENERAL ELECTRIC LAMP COMPANY LIMITED of
11 Abchurch Lane in the City of London and DESMOND GERALD FITZGERALD of
46 Loughborough Road, Brixton in the County of Surrey, Electrician do hereby
declare the nature of this Invention to be as follows:-
In those secondary batteries of which the active materials are peroxide of lead and
spongy lead, the latter substance has hitherto been held or contained on or in
supports made of lead or of an alloy of lead with antimony. In certain cases the
great weight of these leaden supports is an objection. Now my Invention consists
in the use of copper or of an alloy of this metal, or of copper coated with any
suitable metal or alloy as materials for constructing the supports in the case of the
spongy-lead element. Thus for instance I construct a kind of trellis or grid with
strips of copper, immerse this in melted solder and afterwards fill the apertures with
"lithanode material" such as a mixture of oxide and sulphate of lead. Or I take a
sheet of copper perforated with holes or a sheet or sheets of copper gauze and pre-
ferably after iminersing them in "soldering fluid" and then in melted solder or lead,
or any suitable alloy, I fill the apertures with a lead compound susceptible of being
readily reduced to the condition of spongy lead. After effecting the reduction by
making the plate a cathode in an electrolyte of sulphate of magnesia in solution or of
dilute sulphuric acid the prepared plate is ready for use as a positive element in n
voltaic battery.
Prior to reduction, the above plates may advantageously be used as cathodes in
certain operations of electrolysis e.g. in the electrolytic generation of chlorine and
hypochlorites.
… …L:
1800 Mah - طيف
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
Improvements in or connected with the Positive Elements (Negative
Electrodes in Charging) of Secondary Batteries, which Elements
are Applicable also as Cathodes in Electrolysis.
We
THE MINING AND GENERAL ELECTRIC LAMP COMPANY LIMITED of
11 Abchurch Lane in the City of London and DESMOND GERALD FITZGERALD of
44 Loughborough Road Brixton in the County of Surrey Electrician do hereby
declare the nature of this Invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:
In those secondary batteries of which the active materials are peroxide of lead and
spongy lead the latter substance has been hitherto held or contained on, or in, supports
made of lead, or of an alloy of lead with antimony. The great weight of these leaden
Now
supports and their want of rigidity are objections to their use in many cases.
this Invention consists in the use of copper or of an alloy of copper or of copper
coated with any suitable metal or alloy as materials for constructing the supports in
the case of the spongy lead element. Thus for instance a kind of trellis or grid is
constructed with strips of copper and this trellis or grid is immersed in melted solder
and afterwards the apertures are filled with "lithanode material."-such as-a inixture

page_text: of oxide and sulphate of lead. Or a sheet of copper is taken and perforated with
holes or a sheet or sheets of copper gauze is, or are, taken and the apertures are filled
with a load compound susceptible of being readily reduced to the condition of spongy
lead the said sheet or sheets being by preference previously immersed in "soldering
fluid" and then in melted solder or lead or any suitable alloy.
The plates should be provided with conducting strips or tangs which are preferably
of lead as usual and care should be taken not to allow any bare copper to be exposed
above the electrolyte when the plates are in position in the battery.
After effecting the reduction of the spongy lead (by making the plate the cathode
in an electrolyte which is preferably a solution of sulphate of magnesia sulphate of
soda or potassic or sodic hydrate but which may he any other suitable electrolyte such
for instance as dilute sulphuric acid) the prepared plate is ready for use as a positive
element in a voltaic battery.
Prior to reduction the above plates may advantageously be used as cathodes in
certain operations of electrolysis such as in the electrolytic generation of chlorine and
hypochlorites.
2
Having now particularly described and ascertained the nature of our said Invon-
tion and in what manner the same is to be performed we declare that what
we claim is:-
The employment of copper or of an-alloy of copper in the construction-of supports
for the active material in positive. elements (cathodes in charging) of secondary
batteries and in cathodes to be used in electrolysis.
1000
THE MINING & GENERAL ELECTRIC LAMP COMPANY, LIMITED.
By J. H. Hays,
Secretary.
DESMOND C TITY CERALD