Improvements in Electrode-plates for Secondary Batteries.
Year: 1892

page_text: Date of Application, 21st Sept., 1892
Complete Specification Left, 15th June, 1893--Accepted, 12th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Electrode-plates for Secondary Batteries.
I, ADOLPH MÜLLER, of Hagen in Westphalia, in the Kingdom of Prussia,
Germany, Managing Director, do hereby declare the nature of this invention to be
as follows:-
The present invention relates to the electrodes of electric accumulators, in which
the available surfaces of contact between the active material and its support are
increased by providing these electrodes or plates with parallel and symmetrical ribs.
In order to still further increase the said surface, without increasing the weight
of the plates, I divide each rib into a number of sections by grooves or recesses
arranged at an angle to the long axis of the rib, these grooves or recesses being so
arranged that the first, third, fifth &c. ribs have their sections in face of the grooves
or recesses of the second, fourth, sixth &c. ribs, and vice versa.
The ribs may run
in straight lines or otherwise and may be perpendicular or at any desired angle to
the plate. The rows of sections can be also made of various hights, the alternate
ribs being made shorter, whereby more space is obtained for the active material.
Dated the 21st day of September 1892.
J. H. JOHNSON & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Electrode-plates for Secondary Batteries.
I, ADOLPH MÜLLER, of Hagen in Westphalia, in the Kingdom of Prussia,
Germany, Managing Director, do hereby declare the nature of said 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 electrodes of electric accumulators in which
the available surfaces of contact between the active material and its support are
increased by providing these electrodes or plates with parallel and symmetrical ribs.
In order to further increase the said surface, without increasing the weight of the
plates, I divide each rib into a number of sections by grooves or recesses arranged
at an angle to the long axis of the rib, these grooves or recesses being so arranged
that the first, third, fifth, (and so on) ribs have their sections in face of the grooves
or recesses of the second, fourth, sixth, (and so on) ribs, and vice versa. The ribs
may run in straight lines or otherwise and may be perpendicular or at any desired
angle to the plate. The rows of sections can be also made of various hights, the
alternate ribs being made shorter, whereby more space is obtained for the active
material.
And in order to make my invention more fully intelligible, reference is made to
the accompanying drawing in which
Fig. 1 is an elevation, Fig. 14 a vertical section on line a-a, Fig. 1, and 18 a
perspective view of a portion of an electrode-plate constructed according to this
invention.
r, r, rare the sections of the first, third, fifth &c. ribs, and r², r², . . the
sections of the second, fourth, sixth &c. ribs ; 9, 9, 9 . . . are the grooves separating
the ribs from each other, and g', g', g¹ the grooves or recesses dividing each rib
into the said sections, are the sides of the ribs and r₁ the sides of the grooves g¹.
As is clearly seen from these figures, the recesses g' are cut into the ribs in such a
manner that the sections of each rib have their sides in face of the recesses g' of

page_text: the proceeding and following ribs, whereby a great amount of supporting surface is
obtained. In this special example the ribs and their recesses are supposed to be
large, whilst the grooves g are but small, so that such an electrode has the
appearance of a plate formed with parallel series of short ribs, the said series being
shifted to each other.
Fig. 2, 24 and 2B which respectively are an elevation, a vertical section on
line a-a
Fig. 2, and a perspective view of a portion of an electrode-plate, show the
above mentioned modified construction, in which the alternate ribs for instance
those having the sections are made higher than the neighbouring ribs or those
having the sections r. By this arrangement more space is obtained for packing
into active material.
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 :
An electrode-plate for secondary batteries having ribs divided into sections by
grooves which are so arranged as to alternate in the alternating ribs, substantially
as described.
J. H. JOHNSON & Co.,
Agents.