Improvements in Primary Batteries.
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in Primary Batteries.
I, ALBERT 'FANNENBERG, of 37, Gotzkowskystrasse, Berlin, in the Empire of
Germany, Mechanic, 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 present invention has reference to primary batteries and more particularly
to carbon zinc batteries.
The invention consists in providing the carbon electrode of a carbon zinc battery
slotted where it is immersed in the electrolyte in order to increase the effective
electrode surface area within a minimum space and to facilitate the adjustment
of the electrodes in relation one to the other.
The invention is illustrated in the accompanying drawings, in which,
Figure 1 is a sectional elevation of a battery according to the invention.
Figure 2 is a sectional plan on the line ay (Figure 1), and
Figure 3 is a plan corresponding to Figure 1.
In carrying the invention into effect as illustrated in the accompanying draw-
ings a glass vessel a has provided therein a zinc cylinder which surrounds the
carbon electrode c. The carbon electrode c is divided by a radial slot into two
stems which reach downwards into the electrolyte. By such means an enlarge-
ment of the electrode surface is provided without the electrode itself losing in
cohesiveness. The slot which is provided between the stems of the carbon elec-
trode permits at the same time of a corresponding enlargement of the effective
surface of the zine electrode. As the figures indicate, the zinc plate is not united
to form a closed casing but one end of the plate passes through the slot in the
carbon electrode in a transverse position to its circular surrounding part. Such
an arrangement of the electrodes has the further advantage that it provides for
an exact and an immovable adjustment of the electrodes at a proper distance
from cach other. For this purpose support and insulating pieces dd of wood or
such like insulating material are provided which correspond to the shape of the
slot in the carbon electrode and liave slots therein for the reception of the zine
electrode b and their extremities are so formed as to hold the cylindrical electrode b
firmly in position. The lower supporting and insulating piece d serves at the
same time for the support of the electrodes within the glass vessel and projects
outwardly for this purpose underneath the zine cylinder and thereby prevents con-
The carbon electrode may be
tact thereof with the surface of the glass jar a.
divided by more than one slot so as to form more than two stems in which case
the zinc electrode would be formed with a corresponding number of transverse
plates. The carbon electrode stems may be covered with suitable depolarising
substances in any well known manner.
The invention is not limited to a battery composed of carbon and zinc elements
as the object of the invention could be attained in batteries having electrodes of
then motorials than those specified.

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 primary battery, such as a carbon zinc battery, characterised by the fact
that the carbon electrode is divided for the purpose of providing an enlargement
of the effective surface area and for the purpose of permitting of the zinc electrode
being correspondingly extended, substantially as described.
2. In a battery such as herein before described the provision of support and
insulating pieces, such as dd, of the shape and for the purpose herein before
described and illustrated.
3. A battery substantially as hereinbefore described and illustrated.
Dated this 24th day of May 1899.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.