Improvements in Electric Accumulators.
Year: 1896

page_text: Date of Application, 18th Feb., 1896
Complete Specification Left, 5th Aug., 1896-Accepted, 12th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Electric Accumulators.
We FRANÇOIS MOUTERDE, CAMILLE CHAVAUT, and JOSEPH GEORGE,
trading as Mouterde, Chavaut and George, of 17 Rue de Sèze, Lyons in the
Republic of France, Manufacturers of Electrical Apparatus, do hereby declare the
nature of this invention to be as follows:-
This invention relates to electric accumulators and consists in making the form
given to the positive and negative electrodes cylindrical. The surface of the
positive action occupy the exterior surface of the negative electrode, that is to
say that cylinder + works in the interior and the cylinder works on the exterior;
giving a greater capacity to the electrode with reference to a less capacity given
to the electrode +; the mode of constructing each electrode; the peculiar action
of the lead plates serving for the construction of the positive as negative -
electrodes; the using of a perforated lead covering placed round the negative
electrode; the process of manufacture of endless plates serving for the electrodes +
and
We form the positive electrode + by a cylinder of lead provided in the interior
with deep transverse grooves, these grooves are wider in their inner part than at
their surface in order to form hollows of dovetail form. The two edges of this
cylinder are strengthened by a massive band; one or more current connectors are
welded to this cylinder band.
The grooves in dovetail form are filled with paste of lead oxyde used in the
construction of accumulators. The exterior surface of the cylinder + is left
without application of oxyde; it is covered with an isolating coating to prevent it
being affected by the electrical current. The electro-chemical action is therefore
limited to the inner surface of the positive cylinder +.
We form the negative electrode - by a cylinder of lead provided in the interior
with deep transverse grooves, these grooves being wider in their lower part than on
their surface in order to form dovetail grooves. These grooves are much deeper in
the negative electrode than in the positive electrode. The diameter of the negative
cylinder is smaller than the positive cylinder + in order to leave a circular space
of about a centimeter between the two electrodes -.
The dovetail grooves are also filled with paste of lead oxide used in the
manufacture of the negative plates of accumulators.
The greater depth of the grooves of the negative cylinder hold a larger
quantity of lead oxide paste than those in the positive electrode and to compensate
for its smaller diameter and also to allow giving to the negative electrode a capacity
a quarter greater than to the positive although the diameter of the positive cylinder
is larger.
-
This negative cylinder is also coated with a covering of thin perforated lead
plate serving to maintain in place the spongy lead formed at the time of charging
the accumulator.
The inner surface of the negative cylinder is left without application of lead
oxide. The action of the electrical current is therefore limited to the exterior
surface of the negative electrode.
The complete element of an accumulator is therefore composed of one or more
pairs of eccentric cylinders alternated + and -, the cylinder + occupying always

page_text: the largest diameter with reference to the corresponding cylinder -. These
cylinders and are placed upon a cross bar in a cylindrical receptacle and filled.
with acidulated sulphuric electrolytical water as used in accumulators.
The positive and negative cylinders are produced by rolling upon a mandril
a plate of grooved lead and by welding the two ends of this plate. We make these
plates by means of a press with a screw plate conveniently cut whereby a cylinder
which will be provided with grooves in form of dovetail grooves is provided.
Dated this 18th day of February 1896.
HERBERT HADDAN & Co.,
Agents to Applicants.
Improvements in Electric Accumulators.
We FRANÇOIS MOUTERDE, CAMILLE CHAVAUT and JOSEPH GEORGE,
trading as Mouterde, Chavaut and George, of 17 Rue de Sèze, Lyons in the
Republic of France, Manufacturers of Electrical Apparatus, 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 electric accumulators and consists in making the form
given to the positive and negative electrodes cylindrical. The surface of positive
action occupies the exterior surface of the negative electrode, that is to say, the
positive cylinder works in the interior and the negative cylinder works on the
exterior giving a greater capacity to the negative electrode with reference to a less
capacity given to the positive electrode. The invention also relates to the mode of
constructing each electrode, the peculiar shape of the lead plates serving for the
construction of the positive and negative electrodes, the using of a perforated lead
covering placed round the negative electrode and the process of manufacture of
endless plates serving for the positive and negative electrodes.
In the annexed drawing.
Fig. 1 is an elevation partly in section of the positive electrode. Fig. 2 is a
similar view of the negative electrode.
Fig. 3 is a plan of the two electrodes one within the other.
Fig. 4 represents in cross section the divided tube out of which the electrodes
are made. Fig. 5 shows said tube spread out to form a grooved plate of indefinite
longitudinal extent.
We form the positive electrode by a cylinder or sleeve m of lead provided in the
interior with deep transverse grooves o; these grooves are wider in their inner part
than at their surface in order to form hollows of dovetail form. The two edges of
this cylinder are strengthened by a massive band b; one or more current
connectors p are welded to this cylinder band. The grooves o, in dovetail form,
are filled with paste of lead oxide used in the construction of accumulators. The
exterior surface of the positive cylinder is left without application of oxide; it is
covered with an insulating coating in to prevent it being affected by the electrical
current. The electro chemical action is therefore limited to the inner surface of
the positive cylinder.
We form the negative electrode by a cylinder m¹ of lead provided in the interior
with deep transverse grooves o¹; these grooves being wider in their lower part than
on their surface in order to form dovetail grooves. These grooves o¹ are much
deeper in the negative electrode than in the positive electrode. The diameter of
the negative cylinder is smaller than the positive cylinder in order to leave a
circular space of about a centimeter between the two electrodes.
The dovetail grooves o' are also filled with paste of lead oxide used in the
-manufacture of the negative plates of accumulators. The greater depth of the

page_text: grooves of the negative cylinder holds a larger quantity of lead oxide paste than
that in the positive electrode and to compensate for its smaller diameter and also to
allow of giving to the negative electrode a capacity a quarter greater than that of
the positive although the diameter of the positive cylinder is larger.
This negative cylinder m' is also coated with a covering pl of thin perforated lead
plate serving to maintain in place the spongy lead formed at the time of charging
the accumulator.
The inner surface of the negative cylinder is left without application of lead oxide.
The action of the electrical current is therefore limited to the exterior surface of
the negative electrode.
The complete element of an accumulator is therefore composed of one or more
pairs of concentric cylinders m and m', the positive cylinder occupying always the
larger diameter with reference to the corresponding negative cylinder. These
positive and negative cylinders are placed upon a cross bar in a cylindrical
receptacle and filled with an electrolyte of sulphuric acid and water as used in
accumulators.
The positive and negative cylinders are produced by rolling upon a mandril a
plate of grooved lead (Fig. 5) and by welding together the two ends of this plate.
We make these plates as shown in Fig. 5 by means of a press as used for
manufacturing lead pipes with a conveniently cut die whereby a pipe a may be
made having on its surface ribs d of dovetail cross section, and at one place
a thicker rib to form when the tube is divided lengthwise at c the two thicker
bands b b. After division at c the tube is spread out flat as in Fig. 5 and a given
length of it is cut off and rolled in the form of a cylinder such as m and connected
at the edges, the ribs d then forming between them the annular grooves o
aforesaid.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. In an electric accumulator an electrode of cylindrical form, one face of which
is provided with annular grooves extending round the cylinder for the purpose set
forth, such electrode being formed from a pipe having grooves extending lengthwise
thereof which pipe is divided longitudinally, spread open, severed into lengths and
said lengths wrapped round a mandril cylindrically and one severed edge connected
to the other substantially as set forth.
2. In an electric accumulator the combination of the negative electrode within
the positive electrode so as to limit the electric action to the annular space between
the electrodes.
3. The particular construction of the negative electrode and positive electrode
whereby the latter is of greater capacity than the former, each electrode having in
the face opposed to the other electrode, grooves, those in the negative electrode
being deeper than those in the positive electrode in order to hold more lead oxide
baste.
4. The combination with the negative electrode having grooves o in its face
pposed, of a perforated sleeve pl over said face to retain the lead oxide paste in
he said grooves.
Dated this 5th day of August 1896.
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C.,
Agents to Applicants.