Improvements in Accumulator Plates.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Accumulator Plates.
We, ARTHUR LEHMANN, Chemist, and AUGUST MANN, Merchant, both of 46A,
Georgenstrasse, Berlin, N.W., in the Empire of Germany, do hereby declare the
nature of this invention to be as follows:-
This invention relates to the construction of plates for secondary batteries.
This invention consists of a new arrangement and construction of accumulator
plates, and its object is to so form them without the introduction of plastic material
that expansion of the plates when in operation is allowed for in every direction, so
that no injurious expansion in any one direction can take place, at the same time
allowing for the greatest possible surface, so as to preserve the efficiency at its
maximum.
The method of carrying this invention into effect is as follows. A zigzag vertical
core piece or plate has formed upon either side of its vertical surfaces a series or
layer of triangular flaps with suitable horizontal spaces between. Upon the opposite
surfaces of each vertical portion of the zigzag core piece or plate the opposing flaps
are not placed in. the same horizontal plane with one another, but are placed a short
Also the thickness of the
distance below each other alternately on either side.
flaps decreases from the junction of the core piece to the points, and the contiguous
flaps, situated on the vertical surfaces of each angle of the zigzag plate on one side
of it, are arranged in a similar alternate manner to the opposing flaps hereinbefore
referred to.
By this method of construction expansion in any direction is allowed for, and
no injurious expansions can take place as is often the case in accumulator plates as
at present constructed.
1007
Improvements in Accumulator Plates.
We, ARTHUR LEHMANN, Chemist, and AUGUST MANN, Merchant, both of 46A,
Georgenstrasse, Berlin, N.W., in the Empire of Germany, 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:-
This invention relates to the construction of plates for secondary batteries in
which the "forming" is constructed without the use of or introduction of a plastic
mass such as lead paste used in the plates of ordinary cells.
The invention broadly consists of a new arrangement and construction of
accumulator plates, these plates being "formed" without the use of plastic material

page_text: and so constructed that their expansion when in operation is allowed for in every
direction so that no injurious expansion in any one direction can take place; at the
same time allowing for the greatest possible surface so as to preserve the efficiency
at its maximum.
Two methods of carrying the invention into effect are illustrated in the accom-
panying sheet of drawings as follows;-
Figure 1 is an elevation in perspective of the new plates, constructed according
to one modification.
Figure 2 is a cross section on the line a b Figure 1, on an increased scale of a
portion of the plate.
Figure 3 is an elevation in perspective of the plates constructed according to a
second modification.
Referring to the modification illustrated at Figures 1 and 2, A zig zag vertical
core piece or plate k has formed upon either side of its vertical surface a series or
layer of triangular flaps with suitable horizontal spaces between. Upon the
opposite surfaces of each vertical portion of the zig zag core piece or plate k the
opposing flaps are not placed in the same horizontal plane with one another, but
are placed a short distance below each other alternately on either side (as clearly
shown in detail on Figure 2). Also the thickness of the flaps decreases from the
junction of the core piece k to the points, and further the contiguous flaps situated
on the vertical surface of each angle of the zig zag plate on one side of it are
arranged in a similar alternate manner to the opposing flaps hereinbefore described.
Referring to the modification illustrated at Figure 3 of the drawings. In this
arrangement of plate the core piece k is flat and not zig zag as in the previous
modification and the alternately placed flaps are rectangular and not triangular.
The applicant is aware that accumulator plates with ribs have been proposed and
used but no plates arranged with a central core piece and separate individual flaps
in transverse rows all connected thereto have hitherto been proposed or used.
It is evident that the shape of the individual flaps and the single core piece may
be considerably modified and all without departing from the subject of the present
invention.
By these and like methods of construction expansion in any direction is allowed
for, no paste or plastic material is necessary, and plates so arranged can be formed
which will give the maximum efficiency when in use.
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, Constructing accumulator plates of a central core piece with a series of
projecting flaps arranged in rows on either side so that each flap can individually
expand and that the sum of all the expansions is safely provided for.
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2, The improved accumulator plate formed" without the use of an inter-
posed plastic paste or mass and so constructed of a zig zag vertical core piece with
alternately arranged projecting and opposing flaps on either side that expansion
in all directions is arranged for and a maximum surface provided and all sub-
stantially as herein before described.
3,-The improvements in accumulator plates substantially as and for the
purposes hereinbefore described with reference to Figures 1, 2, and 3 of the accom-
panying drawings.
MARKS & CLERK.
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