Improvements in Plates for Storage Batteries.
Year: 1899

page_text: Date of Application, 30th Dec., 1899-Accepted, 3rd Feb., 1900
COMPLETE SPECIFICATION.
Improvements in Plates for Storage Batteries.
I, ALEXANDER PALLAVICINI, of 8, Paulstrasse, Berlin, Germany, Manufacturer,
do hereby declare the nature of my 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 the present invention is an improved plate or electrode for storage
batteries or accumulators, which is especially adapted for use in batteries, sub-
jected to rough handling, jolting and shocks, as for inst. in connection with street
cars, motor vehicles and the like.
A plate according to my invention combines the advantages of the so called
lattice or grid plate with those of the so called whole surface plate, allowing of
quick charging and discharging and also of making use of the whole surface of
the plate. My improved plate obviates at the same time the disadvantages of the
grid plate and of the surface plate respectively, inasmuch as it is of comparatively
low weight and securely holds the active material.
The essential novelty in the present invention consists in making the plate in
one piece, thereby obviating dangerous soldering joints, which very soon would be
acted upon by the acid of the battery.
In order to make my invention more readily understood, I have illustrated it on
the accompanying sheet of drawings, Fig. 1 of which shows a perspective side
elevation of a plate according to my invention. Fig. 2 is a sectional elevation
on line XX of Fig. 1.
The lead skeleton is formed of a frame, consisting of side parts or flaps a and
a lead grid b arranged within this frame. The frame and the grid are cast in one.
Upon this grid, upon either side, a number of lead fingers e are cast, as shown in
the upper section of the plate (Fig. 1).
Instead of these fingers I may also use ribs d, crossing each other for inst. in the
shape of a so called St. Andrew's cross, at about the middle of the plate. This
arrangement is shown in the lower section of the plate (Fig. 1).
These lead fingers or ribs serve several purposes: they further the ready distri-
bution of the electric energy all through the active material: they afford the
plate a certain rigidity and prevent it from easily getting broken and lastly
they serve as support for the grid when the active material is being filled into
the frame and prevent a bending through of the grid.
The grid accordingly may be built up of comparatively exceedingly thin
lead and will still be strong enough for all practical purposes.
When the active material has been filled into the frame, the side flaps of the
frame are bent over the edge of the active material and serve to still better hold
the active material in place. This position is shown in strong lines in Fig. 2.
whilst the dotted lines show the side flaps in the original position, before the
active material has been filled in.
The invention is shown as applied to a plate made up of two sections, but it
is obvious, that it is also applicable to plates having only one or a plurality of

page_text: 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:-
1: A plate for storage batteries, having an outer frame, a lead grid within
this frame and lead fingers on either side of the said grid the said parts being cast
in one and the flaps of the said frame being adapted to be bent over the filled in
active material, substantially as and for the purpose set forth.
2: A plate for storage batteries divided into a plurality of sections, each
section being made up of a lead frame, a lead grid within each frame and lead
fingers on either side of each grid, the said parts all being cast in one, and the
flaps of the said frames being adapted to be bent over the filled in active material,
as and for the purpose specified.
A plate for storage batteries, having an outer lead frame, a lead grid within this
frame and a lead cross or crosses formed of ribs on either side of the said grid,
said parts being cast in one, and the flaps of the said frame being adapted to be
bent over the filled in active material.
Dated this 22nd day of December 1899.
W. REICHAU & P. E. SCHILLING,
Agents for the Applicant.