Improved Construction of Electric Accumulator Plates.
Year: 1899

page_text: Date of Application, 9th Sept., 1899-Accepted, 4th Nov., 1899
COMPLETE SPECIFICATION.
Improved Construction of Electric Accumulator Plates.
I, EMIL FRANZ ADOLF POLZIN, of 6, Planufer, Berlin, in the German Empire,
Manager, 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 relates to the construction of an accumulator plate in
the form of a box with divisions. This box consists of two plates slotted or
perforated in a peculiar manner one of which plates is provided with a rim and
a number of stays designed to join the two plates together. The slots or per-
forations are so constructed that the apertures in the plates become narrower
from the inside to the outside.
The active mass in the new plate coheres together and is firmly held in the
box and in the slots of the two plates while the electrolyte has free access to it
from both sides through the slots. By means of this special construction of
the accumulator plate the mass is prevented from warping or falling out and at
the same time high capacity and good current distribution is obtained throughout
the whole plate.
This new plate is illustrated in the accompanying drawings, in which
Figure 1 shews the plate in front view before the two plates are joined
together.
Figure 2 is a section on the line A-B.
Figure 3 is a section on the line C-D.
Figure 4 is a section on the line E-F.
Figure 5 is a section corresponding to Fig. 3 after the insertion of the active
mass and the joining together of the two plates.
Figure 6 is a section on the line G-H also after the insertion of the active
mass.
The complete plate is formed of the two parts a and b which are (as shewn in
the drawing) so perforated that ribs are formed which become wider outwards.
The plate a has a frame or rim c and is provided with stays d. The plate b
has in addition to the perforations already mentioned the holes e for receiving
the reduced ends of the stays d.
After the active mass has been inserted the plates a and b are simply joined
together by turning over the ends of the stays d (preferably conically recessed)
in the manner indicated in Figure 5, which is conveniently effected by means
of pressure between two flat plates.
This new accumulator plate can be made either by casting or by stamping it
out of sheet lead.
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. Improved accumulator plate having its active material enclosed within two

page_text: lead plates one provided with a rim and stays, and the other having suitable
perforations into which the ends of projections on said stays penetrate and are
secured said plates having slots or perforations diminishing outwardly, sub-
stantially as and for the purposes described.
2. The improved accumulator plate constructed substantially as described and
shewn in the accompanying drawing.
Dated the Ninth day of Sentember 1899
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C.,
Patent Agents for the Applicant.