Improved Construction of Electrical Accumulators.
Year: 1895

page_text: Date of Application, 18th Apr., 1895-Accepted, 1st June, 1895
COMPLEIN DIMUITIVATION.
Improved Construction of Electrical Accumulators.
I, VICOMTE GASTON DE SCHRYNMAKERS DE DORMAEL, of Rue Montoyer 34-
Brussels, Belgium, 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:—
My invention relates to an improved construction of electrical accumulators
based on the principle that the oxides in general and in particular the peroxide of
lead, used in accumulators, have no specific conductivity, and that, if they conduct
the current when in action, it is only due to the interposed liquid in which they
are immersed.
The observation of this fact has led me to place the negative collector, whether
a plate or a sheath, against the peroxide itself, without any interposition of
insulating material. It results from this that the negative collector serves to
retain in position the positive depolarising matter; the only precaution to be
observed in this case is to prevent metallic contact between this negative collector
and the central positive collector which projects from the mass of peroxide.
I thus obtain an accumulator or secondary battery element which is protected.
against shocks, in which the internal resistance is reduced to a minimum, and of
which the metal can be lead, tin, copper zinc, cadmium &c.
The element is therefore composed as follows: Upon both sides of a plate of
lead surrounded by a rigid and insulating frame of material that is not affected by
acids, is spread a layer of the depolarising oxide paste so as to be flush with the
surrounding frame; the plate thus coated is either enclosed in a thin very finely
perforated leaden sheath, or it is strongly compressed between two plates of spongy
lead of the same dimensions as the frame, so as to constitute two boxes in which
the oxide of lead is confiued.
According to the intensity of the current to be obtained, one or more of these
elements are placed in one and the same accumulator tank. If there be used, as
negative element, lead, the oxide of which is insoluble there are juxtaposed
alternately a positive element with a frame provided with peroxide, and a
plate of spongy lead, terminating the series with two. negative elements of
spongy lead.
The system is well secured together, and care is taken to form through the
upper parts of the frames vent holes for the escape of gases.
If metals with soluble oxides are employed, positive elements are used mounted
in their sheaths as above described, leaving between them a space in which carbon
or other suitable material is introduced, with the object of holding the parts in
position. The cell is then charged with sulphate of zinc, of cadmium, of tin, of
copper, or other metals, and after some time all this mass which remains spongy,
forms a whole united by the electrolytic action of the charge. The current from
the positive pole is collected on the central collector which emerges from the
positive material; the current from the negative material may be collected by
ties connecting together all the sheaths or all the spongy plates when lead is
employed.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
L
battery
arranging the denalezieine narazide in

page_text: direct contact with the negative material, substantially as, and for the purposes
set forth.
2. Enclosing the peroxide in a metallic sheath forming part of the negative
material, substantially as described.
10th dow of smil 1895
ABEL & IMRAY,
Agents for the Applicant.