Improvements in Electric Storage or Secondary Batteries.
Year: 1896

page_text: Improvements in Electric Storage or Secondary Batteries.
I, FRANK KING of 4 Great Winchester Street in the City of London, Engineer,
do hereby declare the nature of my Invention to be as follows:
The objects of my Invention are to effectually secure the active material or the
material to be rendered active in place on the plate or support and to improve
the efficiency of the battery generally.
According to my Invention I employ a support or grid with perforations or
openings extending through it from side to side and I then paste or apply to
the support or grid the active material or material to be rendered active and
then I apply to the plate an adherent layer or layers of pure Indiarubber so as
to form a coating or membrane extending over and firmly adhering to the plate.
I then pierce through the india-rubber and active material or material to be
rendered active and situated in the openings through the support or grid leaving
a thickness of the said material on the inner walls of the said perforations in
accordance with the size of the perforations or the thickness of the walls thereof
say in ordinary cases a thickness of such active material or material to be
rendered active of from one sixteenth to one quarter of an inch.
When the plates thus made are in use the electrolyte has access by the openings
formed as aforesaid to the active material or material to be rendered active in
each of the perforations whilst the rubber coating holds the said material securely
in place and by insulating the faces of the plates from each other causes the
energy of the battery to be generated in the perforations thus equalizing the
action of the plate and preventing undue activity of the said material at its
contact with the support or grid and also preventing sulphation at the contact
between the conductor and the said material on the face of the plate.
D
190C
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SP
IFICATION.
Improvements in Electric Storage or Secondary Batteries.
I, FRANK KING, of 4 Great Winchester Street, in the City of London, 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 objects of my Invention are to effectually secure the active material, or the

page_text: material to be rendered active, in place on the plate or support, and to improve
the efficiency of the battery generally.
According to my Invention I employ a support or grid with perforations or
openings, extending through it from side to side, and I then paste or apply to
the support or grid the active material or material to be rendered active and
then I apply to the plate an adherent layer or layers of pure india rubber so as
to form a coating or membrane extending over and entering the pores of, and so
firmly adhering to the plate. The coating may be applied by immersion or by
successive immersions in a solution of india rubber or by painting on a layer or
layers of such solution or in any other suitable way. I then pierce through the
india rubber and active material or material to be rendered active which is
situated in the openings through the support or grid, leaving a thickness of the
said material on the inner walls of the said perforations in accordance with the
size of the perforations or the thickness of the walls thereof say in ordinary
cases a thickness of such active material or material to be rendered active of from
one sixteenth to one quarter of an inch.
In the accompanying drawing Figure 1 is-a front view and -Figure 2 is a
transverse section of a part of a plate provided with an india rubber coating in
accordance with my Invention, a is the support or grid with perforations or
openings extending through it, b is the active material or material to be rendered
active, and c is the adherent coating or membrane of india rubber applied as
aforesaid. d are the piercings made through the india rubber and active material
or material to be rendered active. The openings in the grid are shewn square
and some of the piercings are shewn round and some square but they may be of
any suitable shape and although I have shewn but one piercing through each
opening in the grid two or more smaller piercings can be made instead if preferred.
When the plates thus made are in use the electrolyte has access, by the openings
formed as aforesaid, to the active material, or material to be rendered active, in
each of the perforations, whilst the rubber coating which enters the pores as
aforesaid holds the said material securely in place, and by insulating the faces
of the plates from each other, causes the energy of the battery to be generated
in the perforations, thus equalizing the action of the plate and preventing undue
activity of the said material at its contact with the support or grid, and also
preventing sulphation at the contact between the conductor and the said material
on the face of the plate.
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 -
For electric storage or secondary batteries a grid or support with perforations
therethough containing active material or material to be rendered active, and
having applied thereto an adherent coating or membrane of india rubber which
enters the pores of the plate, perforations being made through the rubber and
active material or material to be rendered active substantially as and for the
purposes hereinbefore described.
Dated this 17th day of Santember 1807
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.