Improved Grids or Supporting Frames of Electric Accumulators.
Year: 1889

page_text: Date of Application, 15th July, 1889-Accepted, 17th Aug., 1889
COMPLETE SPECIFICATION (AMENDED).
Improved Grids or Supporting Frames of Electric Accumulators.
I, ERICH CORRENS, of Alt Moabit, Berlin in the German Empire, Electrician,
do hereby declare, the nature of this invention and in what manner the same is to
be perforined, to be particularly described and fascertained in and by the following
statement :-
This invention relates to grids or frames for holding the active material of electric
accumulators. It has for object to prevent the active material from falling out of
its place and to connect the active material of one grid with that of another placed
next to it. It consists in an arrangement one over another of grids formed with
orifices which narrow in area towards the outside, the orifices of the one being so
situate and placed with reference to those of the other that one field of the one is
in contact with four fields of the other.
In the accompanying drawing Fig. 1, is a top view of two-juxtaposed grids a
double grid of this invention in an unfinished state; Fig. 2, a section thereof through
line x-y of Fig. 1; Figs. 3 and 4, respectively a bottom view and a section of part
of a stamp or die for shaping the grids from the unfinished state to a form such as that
shewn in Figs. 5, 8, 9, these two latter figures being respectively a top view and a
section through line y-z of Fig. 8 of two-grids a double grid in the finished state
placed-one-against-the-other; and Figs. 6 and 7 shew other sections of grid bars.
The grids A, A¹, are composed of bars a, a', having an outwardly widening cross
sectional form or such a form that the space or superficial area for the reception of
the active material is narrowed from the inner to the outer side of the grid. One grid
is so laid-over-or-against situate to another that one field or orifice of the one coines
over a portion of each of four fields or orifices of the other.
The grids are made by first casting them in one piece in lead or other suitable metal
in the form of which two examples are given in Figs. 1 and 2. In this unfinished
state they are each placed the-two-together underneath a stamp or die such as shewn
in Figs. 3 and 4 and stainped the bottom one first, the stamp passing past the top
grid. The double grid is then turned over and the operation repeated by which the
rectangular cross section of their bars is stamped orifice by orifice, or all at once to
the cross sectional forin shewn in Figs. 5, 9, or to one which widens out towards the
outside.
In this way the grids-when-placed together double grid will present the appearance
shewn in plan in Fig. 8, and in section in Fig. 9, the orifices being filled with the
active material of the accumulator.
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. In electric accumulators for fixing the active material a single body composed of
two grids placed-inversely one over the other, each having orifices situate irregularly
one over the other and narrowing from the inner to the outer side, the active
material filled into the orifices of both the double grids forming a united whole
substantially as described and shewn.

page_text: 2. The production of a body composed of two grids by means of a stamp or die
such as shewn in Figs. 3, 4, stamping the bottom grid after passing by the upper
grid, the double grids being turned over to bring the shaped grid uppermost and the
second grid to be shaped to the bottom position, substantially as described and shewn
for the purpose specified.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.