Improvements in Secondary Batteries.
Year: 1892

page_text: Date of Application, 6th Aug., 1892
Complete Specification Left, 12th May, 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Secondary Batteries.
We, SIGMUND ADOLF ROSENTHAL, Electrician, and VILLEROY CORNEY
DOUBLEDAY, Accountant, both of 37 Walbrook in the City of London, do
hereby declare the nature of this invention to be as follows:-
Secondary batteries constructed and fitted according to this invention offer the
following advantages viz. that the liquid has perfect access to the active material,
that the latter is so held as to obviate all tendency to buckling of the plates, that
the active material is in a highly subdivided and porous state and can be charged
and discharged at a very high rate, that the entire weight of and space taken up by
the accumulator plates is very small relatively to the power capacity, and that the
whole construction simple, strong and cheap.
The active material is held in a perforated and corrugated piece of sheet lead
forming the conductor so that the material on both sides is keyed together by the
said material itself in the perforations. This plate is contained within a frame of
ebonite or other suitable non-conducting material such frame being of about
the height or thickness of the corrugated plate. The frame is on both sides covered
by a perforated lid of ebonite or other suitable non-conducting material, the
lids and the frame being held together for instance by through rivets or in
any other suitable manner so as to form a closed box containing the plate. The
frame is formed with a recess for the plate tang to pass out.
Dated this 6th day of August 1892.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Secondary Batteries.
We, SIGMUND ADOLF ROSENTHAL, Electrician, and VILLEROY CORNEY
DOUBLEDAY, Accountant, both of 37 Walbrook in the City of London 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:-
Secondary batteries constructed according to this invention have the following
characteristic features and advantages viz. that the liquid has perfect access to
the active material, that the latter is so held as to obviate all tendency to buckling
of the plate, that the active material is in a highly sub-divided and porous state and
can be charged and discharged at a very high rate, that the entire weight and space
taken up by the plate are very small relatively to the power capacity and that the
whole construction is simple, strong and cheap.
Figure 1 is plan of an element, Figure 2 plan with a cover removed, Figure 3
longitudinal section, Figure 3A enlarged section of plate and Figure 4 an enlarged
cross section through the tang, Figure 5 is a cross section through a modified form
of plate enclosing box, Figure 6 a similar view of another modified form of box,
Figure 7 longitudinal section through a modified form of plate and Figure 8 a like
view of another modified form of plate.
The active material is held in spaces A of a perforated and corrugated piece of
sheet lead B, forming the conductor, so that the active material on both sides is
keyed together by the said material itself in the perforations B', the keys forming
the means of perfect continuity. This plate A B is contained within a box having

page_text: perforations for giving the liquid access to the material. C is a strong frame of
ebonite or other suitable non-conducting material of about the height or thickness
of the plate A B within it. The frame C is on each side covered by a thin
perforated lid C' of ebonite or other suitable non-conducting material, the lids C¹
and the frame C being held together by through rivets D or in any other suitable
manner so as to form a box. The frame C is formed with a recess for the plate
tang B2 to pass out. This tang is made thicker at its outside end with a shoulder
at each side against the frame C and the lid C for the sake of strength and for
easy connecting up; it may be of oval section as shown in Figure 4, the connecting
wire E being carried through it and fixed by means of a screw F.
In Figure 5 the box is shown with one cover made in one with it.
Figure 6 shows a box made in two halves.
Or the box may be like an ordinary box with sliding lid at top or at top and
bottom both perforated.
The perforated plate B may be of other corrugated form such, for instance, as
shown in Figure 7 or it may be made flat as in Figure 8.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is:
1. A secondary battery element consisting of a perforated flat or corrugated lead
plate B containing the active material on both sides and in the perforations in
combination with an enclosing box of suitable insulating material consisting of a
strong frame C and thin perforated sides or covers C¹, C₁ united thereto, the frame
having a recess for the tang B2 of the plate B which has shoulders supported
against the frame substantially as described with reference to the drawings.
2. The constructions of plate enclosing box substantially as described with
reference to the drawings.
Dated this 19th day of May 1802
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.