Improvements,in Plates, Grids, or Supports for the Elements of Secondary Batteries.
Year: 1896

page_text: Date of Application, 4th Mar:, 1896
Complete Specification Left, 4th Dec, 1896-Accepted, 23rd Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements,in Plates, Grids, or Supports for the Elements of
Secondary Batteries.
We, EDWARD CLARK of 84 West Ferry Road Millwall, London, E., Engineer
WALTER CLARK of 84. West. Ferry Road, Millwall,, London, E.,. Engineer, and
FRANK KING of 4 Great Winchester Street in the City of London; Engineer, do
hereby declare the nature of this invention to be as follows:-
The object of our invention is to provide plates grids, or supports, for the elements
of secondary batteries which will efficiently retain in place the active material, or
material to be rendered active.
According to our said invention we make the two surfaces of the plate, grid, or
support each of a lattice of any suitable metal or alloy the respective lattices being,
connected together to form the boundary of the plate, by ribs at suitable. distances
apart, and between the lattices, we arrange a web, to form a diaphragm, running
across the middle of the section of the plate, equidistant between the two lattices,
or diagonally, or in a zig-zag manner, so that the web forms a number of alter-
nately reversely placed diagonal ribs, which may join one another at the apex of
each of the angles where they meet the lattice metal surface, of the plate, grid or
support.
We can cast this plate, grid or support, in a chill, or mould, consisting of two
plates, held the required distance apart, by any suitable means, and forming the
matrices for the lattices, and at. right angles to these two plates, we place a number
of triangular or other suitably shaped' rods, which are arranged so as to leave spaces
between them; into which the molten metal shall run, and which are capable of
being withdrawn from the mould, when the plate is cast.
When it is not desired to have a backing or diaphragm between the lattices, the
plate or support is made so that the lattice work is alternately on opposite surfaces.
of the plate, the said lattice work being curved relatively to the surface of the
finished plate. The alternate lattices are connected together, by ribs, or continuations
of metal running sectionally through the plate, and the casting thus formed, is
pressed, so that the alternate lattice work surfaces, are flattened,, or extended, and
the connecting ribs or continuations form, with the said lattice work, surfaces, a
plate, grid, or support, having a series of inverted triangular or trapezoidal spaces,
fitted to hold, and retain securely, the active material, or material to be rendered
active.
Dated thi4CM 1 1000
JOHNSONS & WILLCOX,
47. Lincoln's Inn Fields, London, W.C., Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Plates, Grids, or Supports for the Elements of
Secondary Batteries.
We, EDWARD CLARK, of 84 West Ferry Road, Millwall, London, E., Engineer,
WALTER CLARK, of 84 West Ferry Road, Millwall, London, E., Engineer, and
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 object of our invention is to provide plates, grids, or supports, for the elements.
of secondary batteries which will efficiently retain in place the active material, or
material to be rendered active.
According to our said invention we make the two surfaces of the plate, grid, or
support each of a lattice of any suitable metal or alloy the respective lattices being
connected together to form the boundary of the plate, by ribs at suitable distances
apart, and between the 'lattice we arrange a web, to form a diaphragm, running.
across the middle of the section of the plate equidistant between the two lattices,
or diagonally, or in a zig-zag manner, so that the web forms a number of alternately
reversely placed diagonal ribs, which may join one another at the apex of each of the
angles where they meet the lattice metal surface, of the plate, grid, or support.
We can cast this plate, grid, or support, in a chill or mould consisting of two
plates, held the required distance apart, by any suitable means, and forming the
matrices for the lattices, and at right angles to these two plates, we place a number of
triangular or other suitably-shaped rods, which are arranged so as to leave spaces
between them, into which the molten metal shall run, and which are capable of being
withdrawn from the mould when the plate is cast.
When it is not desired to have a backing or diaphragm between the lattices the
plate or support is made so that the lattice work is alternately on opposite surfaces of
the plate, the said lattice work being curved relatively to the surface of the finished
plate. The alternate lattices are connected together by ribs or continuations of metal
running sectionally through the plate, and the casting thus formed, is pressed so that
the alternate lattice work surfaces, are flattened or extended and the connecting ribs
or continuations form, with the said lattice work surfaces, a plate, grid, or support
having a series of inverted triangular or trapezoidal spaces fitted to hold and retain
securely the active material, or material to be rendered active.
Figure 1 of the accompanying drawings is a side elevation of a battery plate
constructed according to this invention, as it leaves the mould.
Figure 2 is a transverse vertical section on the line 1-2 Figure 1, and Figures 3
and 4 are similar sections shewing different forms of the diaphragm or web in the
interior of the plate.
Figure 5 is a longitudinal section on the line 3-4. Figure 1 and Figure 6 is
a plan of the finished plate.
Figure 7 is a side elevation of a modified form of plate in which the lattices
on opposite sides of the plate are not opposite each other.
Figure 8 is a vertical section of the plate as it leaves the mould, the lattice work
being curved outwards, and Figure 9 is a similar view of the plate shewing the
lattice work pressed inward flush with the general surface of the plate.
Figures 10 and 11 are sections at right angles to each other, of the mould for
moulding the plates illustrated by Figures 1 to 6, and Figures 12 and 13 are
similar views of a mould for moulding the plates illustrated in Figures 7, 8 and 9.
The lattice work may be of any desired shape or design, that is to say, the

page_text: openings a may be square, round, oval, octagonal, or any other desired shape and
the lattice work on the two sides of the plate may be connected together by any
desired number of transverse ribs & forming the sides of recesses to receive active-
material or material to be rendered active.
Extending from rib to rib 6, between the lattice work on the two sides of the
plate, are webs c which may be parallel with the sides of the plate as shewn in
Figure 2 or they may be formed at an angle to the sides, and all slope in the
same direction, from one side towards the opposite side of the plate as shewn in
Figure 3 or the said webs e may incline between the ribs b alternately in opposite.
directions as shewn in Figure 4. When the plate is moulded a portion of one side
extends beyond the other side as shewn at d Figures 1 and 5, which extended part is
afterwards folded down to complete the plate or grid as shewn in Figure 6. In
forming the plates illustrated by Figures 7 and 9 the plate as it leaves the mould has
the lattice work projecting from the sides of the plate as shewn in Figure 8, the:
lattices on one side of the plate not being opposite those on the opposite side of the
plate. These projecting lattices are afterwards pressed inwards or flattened to
the general thickness of the plate the effect of which flattening is to cause the ribs b-
to be distorted or inclined alternately in opposite directions as shewn in Figure 9 so
as to form dovetail or like recesses a on each side of the plate to contain and securely
hold the active material or material to be rendered active. e are lugs cast on the
plates for connecting the plates to the poles of the battery. The chill or mould for
casting the plates illustrated in Figures 1 and 2 is shewn in Figures 10 and 11 and
consists of parts or halves A and B, and split withdrawal cores C, a mouth or gate D
being provided through which the molten metal is fed into the mould. E are filling
pieces for forming spaces in the mould for the reception of molten metal to form the
outer rim of the plate and the lugs e for connecting the plates to the pole pieces of the
battery.
The spaces F in the split cores C receive the molten metal to form the webs c-
on the plates. G are guide pins or studs to ensure the halves or parts of the chill
being accurately connected together. The mould for casting the plates illustrated in
Figures 7, 8, and 9 is shewn in Figures 12 and 13 and consists of halves or parts A B
as in Figures 10 and 11, but as these plates have no internal web, cores such as C
herein before described are not required. The parts or halves A and B are both alike
and interlock one with the other as shewn in Figure 13, spaces 6² being provided
between the interlocking parts to receive the metal which forms the ribs b of the
plate, suitable filling pieces E being provided to form the outer rim and the lugs e.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-.
-
1. Plates, grids, or supports for secondary batteries having sides of lattice
connected by ribs and with a diaphragm parallel with the sides or arranged
diagonally or zig-zag, substantially as herein before described.
2. Plates, grids, or supports for secondary batteries having sides of lattice
connected by transverse ribs or continuations, substantially as hereinbefore described.
3. The construction of plates, grids, or supports for secondary batteries by first
casting a plate of the form shewn in Figure 8, and then flattening it to reduce
it to the form shewn in Figure 9.
4. The several plates, grids, or supports for secondary battery plates, hereinbefore-
described and illustrated in the accompanying drawings.
Dated this 4th dose of Dasamber 1896
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.