Improvements in or relating to Accumulator Plates.
Year: 1899

page_text: Date of Application, 1st Feb., 1899-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in or relating to Accumulator Plates.
I, PAUL FERDINAND RIBBE, of No. 30, Grolmanstrasse, Charlottenburg, in the
German Empire, 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 present invention relates to an accumulator plate in which the active
material is inserted in a perforated lead plate and is prevented from falling out by
insulating plates covering the aforesaid lead plates.
These latter are supported by forming apertures in the lead plate into which
the plates are bent in from both sides, so that the places where they are in con-
tact can be covered with a suitable cement and the plates be thus joined together.
as retaining
The cover-plates also have perforations, the edges of which serve
pieces for the active material inserted in the hollows of the lead plate.
The invention forming the object of the present application is illustrated in the
accompanying drawings, in which
Figure 1 is a front view of the plate.
Figure 2 is a section on the lines A-A of Fig. 1.
Figure 3 is a section on the lines B-B of Fig. 1.
Figure 4 is a section on the lines C-C of Fig. 1.
Figure 5 is a section on the lines D-D of Fig. 1.
The stamped lead plate a is divided into separate areas, and has a number of
narrow perpendicular bars, but only a few thick ones in the horizontal direction.
The perpendicular bars are of quadrangular section, and arranged diamond-wise
so that one diagonal is equal to the thickness of the plate.
The plate is filled in the usual way with filling material, which material thus
forms bodies, the section whereof is recessed in the middle, and widens towards
the sides. To prevent the falling out of the filling material, the accumulator
plate is covered with a plate b, c of insulating material, such as celluloid. The
celluloid plates are likewise constructed with perforations. Their perpendicular
bars lie against the perpendicular bars of the lead plate a and thus form supports
for the active material in the perforations of the lead plate, whilst' the acid has
free access thereto.
The plates b, c are connected in the following manner.
The grating of the plate a is interrupted at regular intervals so that there is
formed a connecting space. This is then provided with a depression dat intervals,
into which the plates b, c are pressed, so that they are in contact and can be suit-
ably coated with acetone or the like, and thereby firmly cemented together.
The new accumulator plates are of very light weight, in spite of their large
capacity, because the requisite strength is obtained not only by means of the lead
plate, but also by means of the two insulating plates which are much lighter.
They are therefore specially suitable for transportable accumulator batteries, such
as are used on tramcars, motor cars, and the like.

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 :-
1. The improved accumulator plate for secondary batteries, in which the
plates b, c enclosing the lead plate a and connected together through the same,
serve, together with the correspondingly stamped lead plate, for the reception of
the active mass in such a manner, that the fixed ridges formed between the aper-
tures of the lead plate are given the shape of a rhombus or sectionally diamond
shaped (as shewn in Fig. 5), so that their outer angles lie in the same plane as
the rims of the apertures of the lead plate, and consequently come in contact
with the covering plates aforesaid, which latter are connected together at intervals
through the lead plate.
2. The improved covered plate for accumulators constructed substantially as
and for the purposes set forth, with reference to the accompanying drawing."
1000
W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.