Improvements in Electric Power Storage Batteries or Accumulators.
Year: 1895

page_text: Date of Application, 28th Oct., 1895-Accepted, 7th Dec., 1895
COMPLETE SPECIFICATION.
Improvements in Electric Power Storage Batteries or
Accumulators.
I JACOBUS LANGELAAN of Cologne Kameckestrasse No. 10 Rhenish Prussia,
Germany Electrician do hereby declare the nature of this invention and in what
manuer the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The plates or electrodes of electric power storage batteries or accumulators
forming the positive ends of the battery have generally their place between two
like electrodes of the negative polarity and show the general defect that the
active mass contained in them, is expanded and curved by the stronger electro-
chemical influence upon one side of them, being exposed to the alternate effect
of the whole capacity of both sides of a negative end plate, whilst the other
positive storage plates in the battery have each of their faces regularly exposed
to the effect of but half the capacity of a negative plate, or the capacity of one
side of a plate only.
The said bad consequences have been sought to be compensated by making the
opposite end plates only of half the capacity of the other ones, without success
because the surface of the plate, and with it its resistance, remained the same.
My new invention relates to a plate for end electrodes of electric power storage
batteries, to which I give such a shape, that in comparison to the other plates
of the battery it has only half the surface and only half the capacity of them.
I attain this by punching out of the surface of a plate of full capacity so much
of the active mass, that the capacity is reduced to about half the former, and at
the same time the surface is reduced by this process to nearly half of the ordinary
whole plate.
The accompanying drawing shows in Fig. 1 a plan of an electric storage battery
in skeleton form.
Fig. 2 is a front view of the new plate.
In the drawing Fig. 1. the positive storage plates P, P¹ and the negative storage
plates N, N' are alternately connected to the conductors + and -. It is seen that
in the middle part opposite to each side of a positive plate P is the one half or the
one face of a negative plate N, and only at the ends there is an exeption to this.
Here the plate N' influences by both its side surfaces the opposite outer side
surface of the positive plate P1 and the consequence resulting from the stronger
straining of the positive plate is the bending or buckling and bulging of the last
positive plates PI as indicated.
This plate
My new electric power storage endplate is shown by N" in Fig. 2.
has so many holes a, a, that is so much of the active mass cut out, that it possesses
only about half the surface and half the capacity of the other plates. The shaded
parts of the plate indicating the remaining mass and surface. The holes may be
of any convenient shape, but they must be of such numbre and size that they
reduce the surface and the active mass remaining and thus also the capacity to
about half that of the whole plate.
In putting this new endplate N" in the places of N' in the battery, the
neighbouring plates P¹ will no more buckle or be bent out as in Fig. 1, so that the
breaking out and falling off of active mass from P' will be prevented and
the durability of the electric power storage battery will be considerably increased.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
"In electric power storage batteries an end plate or electrode N, the capacity
and surface of which, as compared with the other plates of the same battery has
been reduced to about half that of the other plates by cutting holes a into the
same.
"
D
1005
JACOBUS LANGELAAN,
Per Karl J. Mayer,
Agent.