Improvements in Electrical Secondary or Storage Batteries.
Year: 1892

page_text: Date of Application, 4th Apr., 1892
Complete Specification Left, 4th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Electrical Secondary or Storage Batteries.
I, GEORG EDUARD HEYL of 101 and 102 Leipziger Strasse, Berlin in the
German Empire, Chemist, do hereby declare the nature of this invention to be as
follows:-
My invention relates to certain improvements in the construction of grids for
secondary or storage batteries, the objects being to provide a greater contact
surface between the framework and the substance or composition with which said
framework is filled; and also to provide for the expansion of said substance or
composition.
In order that my invention may be more clearly understood I have appended the
accompanying sheet of drawings, in which:
Figure
is a front elevation of the improved grid according to my invention.
Figure 2 is a front elevation of a portion of said grid, drawn on an enlarged
scale.
Figure 3 is a sectional elevation on the line A B in Figure 2, and
Figure 4 is a sectional plan on the line C D in Figure 2.
The aforesaid grid or frame consists of a series of horizontal bars or ribs a
preferably of lead, aluminium, or a combination of lead and aluminium, secured to
an outer frame F. These bars or ribs are placed at a short distance from one
another, and are in shape as shown in Figure 3, that is to say slightly conical or
tapering towards the edge. The horizontal bars or ribs a are crossed by vertical
bars b, of which two are shown in the drawing. Said vertical bars bare slotted, as
indicated at c, and the slot may extend through the whole length of the bar, or it
may be interrupted as shown at d Figure 1. The edges of the vertical bars b are
slightly bent towards the adjacent horizontal bars a as will be seen at c¹ c¹ in
Figure 4.
In order to increase the stability of the grid or frame I may also add auxiliary
vertical barse which need not be slotted. The frame and the bars a be are all
cast in one piece. The rectangular spaces left between the bars are filled in the
ordinary manner with any suitable substance such as that used generally in the
composition of electrodes for storage batteries. The plates are then ready for use.
When the storage battery, constructed in accordance with my invention, is in use,
the mass will expand, the expansion principally taking place parallel to the
horizontal bars a. By said expansion the vertical bars 6 are slightly bent, but the
slots c allow for such bending, so that the electrode in itself remains uniform.
The bent edges also assist in preventing any loosening or falling out of
the composition.
Thus the electrode, improved according to my herein described invention, answers
all the requirements for practical use, being firm, solid, and effective in retaining
the composition between the bars as above described.
Dated this 28th day of March 1892.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Electrical Secondary or Storage Batteries.
I, GEORG EDUARD HEYL of 101/102 Leipziger Strasse, Berlin, in the Kingdom
Prussia, German Empire, Chemist, do hereby declare the nature of my
[Price 8d.1

page_text: invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
My invention relates to certain improvments in the construction of electrode-
frames for secondary or storage-batteries, whereby a great surface of contact is
secured between the electrode metal and the mass held by the same, and whereby
the expansion of the mass at the positive pole is allowed to take place unhindered,
thus preventing a bending and curving of the positive electrode.
In order to make my meaning fully clear, I will proceed to describe an electrode
frame for storage batteries, made according to my improvements, reference being
had to the drawings sent in with Provisional Specification, in which :-
Fig. 1 is a front elevation of my improved electrode frame for storage batteries.
Fig. 2 is a front elevation of a portion of said electrode-frame, drawn to an
enlarged scale.
Fig. 3 a sectional elevation on the line A-B of Fig. 2.
Fig. 4 a sectional plan on the line C-D of Fig. 2.
The electrode-frame consists first of a series of horizontal metal bars or riba a,
generally of lead, aluminium, or lead and aluminium, secured to au outer frame F.
These bars are provided at a short distance from each other and are of the cross-
section shown at Fig. 3, that is to say, slightly conical or tapering toward the edge.
The horizontal bars a are crossed by vertical bars b, of which I have shown two on
the drawing. These vertical bars bare slotted as indicated by c, and the slot may
extend through the whole length of the bar, or it may be interrupted, as shown at d.
The edges of the vertical bars bare slightly bent towards the horizontal bars a
lying next to them, as will be seen at c c on Fig. 4. To increase the stability of
the electrode-frame I may also add vertical bars e which need not be slotted. The
frame F and the bars a be are all cast in one piece.
The rectangular spaces left between the bars a b and e are filled with any mass
used in the composition of electrodes for storage batteries, and the plates are then
ready for use.
When during the employment of a storage battery constructed according to these
my improvements, the polarized mass expands, as is the case at the positive pole,
the expansion principally takes place parallel to the horizontal bars a, in consequence
of the narrowness of the space between the same. By this expansion the vertical
bars bare slightly bent, and the slots c allow for such bending, so that the electrode
in itself remains level. The bent edges c¹ contribute to prevent any loosening or
falling out of the mass. Thus my improved electrode construction answers all the
requirements for practical use, being firm and unalterable, and strongly holding the
mass between its bars.
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. As an article of manufacture: An electrode-frame for storage-batteries,
consisting of parallel tapering bars-a placed a short distance from each other and of
the bars b, crossing the bars a at right angles and provided with slots c, the whole
being arranged within a frame F, for the purpose as described.
2. In the electrode-frame claimed under head 1: The vertical bars 6 having
their edges c¹ bent toward the horizontal bars a, for the purpose as described.
Dated this 4th day of January 1893.
GEORG EDUARD HEYL,
By Fredk. Walker,
Agent for the Applicant.