Improvements relating to Secondary Batteries.
Year: 1888

page_text: Date of Application, 19th Dec., 1888
Complete Specification Left, 11th Sept., 1889-Accepted, 12th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements relating to Secondary Batteries.
I, JOSEPH LEOPOLD HUBER, of Brauerstrasse, 24, Hamburg, in the Empire of
Germany, Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to polarization or secondary electric batteries, and the
object of the same is to construct the electrodes in such a manner as to increase the
effect, capacity and durability of secondary batteries.
I attain this object by embedding in the active mass for the storage of the electricity
such as metallic compounds or substances, conductors of electricity in the form of a
grating or screen in such a manner that the active mass will form a layer all around
the single bars or rods constituting the meshy or reticulated conductors and the
finished electrode will maintain the form of a network or sieve.
However, I wish it clearly understood, that these perforations are in the active
mass, in contradiction to such well known electrodes, in which the perforations of
the leaden suppert serve to receive the active mass and the remaining perforations
are adapted to permit an expansion of the active material so that, while in these latter
electrodes the surface of contact between the active material and the electrolyte is
diminished on the contrary in the electrodes constructed according to my invention
this surface is considerably enlarged and thus a much greater effect obtained.
In order to embed the conductors of electricity having the form of a network, so
as to cover the single bars of the same with the active material, these conductors are
placed upon a plate or other moulding board, provided with a certain number of pins
of a smaller size, than that of the meshes of the conductor and corresponding with
their pitch, so as to just fit to the middle of the meshes. The space remaining between
the bars of the network of the conductor and the pins of the moulding-board is then
filled up with the active material either by means of kneading or mixing machines or
by pressing rolling or otherwise moulding by hand.
After the said pins of the moulding board are withdrawn or the electrode taken off
from the latter the active mass of the electrode will be provided with the desired
perforations, which allow the electrolyte to pass through the active mass of the electrode,
the surface of contact of which and consequently its effect is thereby essentially
increased.
Instead of perforating the electrodes in the manner heretofore described this may
be effected also by filling up the meshes of the conductors first with the active mass
and thereafter perforating the latter by boring or punching or any other means or
instead of holes passing the active mass, only recesses on one or both sides of the
electrode may be employed to enlarge the surface of contact between the latter and
the electrolyte and to obtain greater effect and capacity of the secondary battery.
Dated this 10th day of December 1888
COMPLETE SPECIFICATION.
Improvements relating to Secondary Batteries.
I, JOSEPH LEOPOLD HUBER, of 34 Brauerstrasse, Hamburg, in the Empire of
Germany, 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 :-
This invention relates to polarization or secondary electric batteries and the object

page_text: of the same is to construct the electrodes in such a manner as to increase the effect,
capacity and durability of the secondary batteries. I attain this object by embedding
in the active mass for the storage of the electricity, such as metallic compounds or
substances, conductors of electricity in the form of a grating or screen in such a
manner that the active mass will form a layer all around or partly around the single
bars or rods, constituting the meshy or reticulated conductors, and the finished
electrode will maintain the form of a net work or sieve.
In the accompanying drawing
Figure 1 is an elevation partly in section, of my improved electrode for secondary
batteries, and
Figure 2 a horizontal section of Figure 1 on the line x, x.
By referring to the said drawing it will be clearly understood that these perforations
are in the active mass, in contradistinction to such well known electrodes in which the
perforations of the leaden support serve to receive the active mass, and the remaining
perforations are adapted to permit an expansion of the active material, so that while
in these latter electrodes the surface of contact between the active material and the
electrolyte is diminished, on the contrary in the electrodes constructed according to
my invention this surface is considerably enlarged and thus a much greater effect
obtained.
In order to embed the conductors of electricity having the form of a net-work,
so as to cover the single bars of the same with the active material, these conductors
are placed upon a plate or other moulding board provided with a certain number of
pins of a smaller size than that of the meshes of the conductor and corresponding
with their pitch so as to just fit to the middle of the meshes. The space remaining
between the bars of the network of the conductor and the pins of the moulding
board is then filled up with the active material, either by means of kneading or
mixing machines or by pressing, rolling or otherwise moulding by hand. After the
said pins of the moulding board are withdrawn or the electrode taken off from the
latter, the active mass of the electrode will be provided with the desired perforations
which allow the electrolyte to pass through the active mass of the electrode, the
surface of contact of which, and consequently its effect, is thereby essentially
increased.
Instead of perforating the electrodes in the manner heretofore described, this may
be effected also by filling up the meshes of the conductors, first, with the active mass
and thereafter perforating the latter by boring or punching or by any other means or
instead of holes passing through the active mass only, recesses on one or both sides
of the electrode may be employed to enlarge the surface of contact between the
latter and the electrolyte and to obtain greater effect and capacity of the secondary
battery.
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:
First In a secondary electric battery, an electrode having the conductor or
conductors of electricity in the form of net-work, grating or screen embedded in the
active mass for the storage of electricity, which mass is provided with perforations or
impressions corresponding with the meshes or holes of the conductor, substantially as
and for the purpose specified.
Second As an improvement in secondary batteries, an electrode consisting of a
conductor or conductors in the form of net work, grating or screen covered with the
active mass, which has formed therein perforations or impressions substantially as
and for the purpose described.
Third An electrode for secondary batteries, comprising a conductor within the
active mass, which mass is provided with perforations or impressions substantially
as and for the purpose set forth.
Fourth-As a new article of manufacture, an electrode for secondary batteries,

page_text: consisting of a conductor or conductors in the form of net work grating or perforated
plate serving as a support for the active mass, which is provided with perforations or
impressions for the passage of the battery fluid substantially as specified.
Dated this 11th day of September 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.