Improvements in the Construction of Plates for Accumulators or Secondary Batteries.
Year: 1893

page_text: Date of Application, 28th Feb., 1893
Complete Specification Left, 7th Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Plates for Accumulators or
Secondary Batteries.
A communication by LA SOCIÉTÉ ELECTRIC PHŒBUS, of 16, Rue Drouot, Paris,
in the Republic of France.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn, in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this
invention to be as follows:-
:-
Accumulator plates with cells or compartments as hitherto constructed do not
provide for the active substance sufficient contact surface to give it all the necessary
cohesion whereby it results that after a relatively short time of working, this
substance disintegrates, and becomes detached from the plate which supports it,
which entails for its maintenance frequent and costly repairs. This improved
construction allows of this drawback being remedied. The plates are cast in two
grated faces held apart, and rendered solid by cross-pieces which are also cast at
the same time with the said plates.
By this means the grate possesses great mechanical solidity, and the active
substance forms in the whole of the interstices, a continuous and coherent mass,
which is perfectly retained in the plate. This new method of construction further
allows of these plates being very easily cast in a metallic mould, the interior casting
core being able to be withdrawn without difficulty.
The plate formed preferably of antimoniated lead, presents as a whole two
grated parallel walls provided with crosspieces, on a median vertical line, and three
horizontal lines, an upper, a lower, and a middle one.
Between these crosspieces and the grated walls, the casting cores are placed
during the casting of the plate, and they can be easily withdrawn after the casting,
by means of the lateral openings. A. certain number of holes arranged in the
walls of the plates, are intended to receive a piece formed of some suitable
insulating material, which projects slightly beyond the two sides of the plate and
by so projecting serves to insulate from one another, the positive plate from the
negative plate, maintaining them at a suitable distance apart.
By this improved construction the active substance is not only lodged in the
various cells contained in the plates, but it also forms between the two walls of
each plate a compact mass. This mass is firmly retained by the projections from
the recesses of the different cells, any destruction is thus rendered impossible, such
as arises from the numerous causes of disintegration which are produced in
accumulators.
It will be understood that this improved construction may be employed, whatever
may be the active substance, or the constituent substances employed in the.
manufacture of the plates, this construction being possible wherever any suitable
fusible material can be used.
Dated this 97th day of February 1893
WM. P. THOMPSON & Co.,
Agents for the Applicant.

page_text: COME LEIE DIBUITIVATION.
Improvements in the Construction of Plates for Accumulators or
Secondary Batteries.
A communication by LA SOCIÉTÉ ELECTRIC PHŒBUS, of 16, Rue Drouot, Paris,
in the Republic of France.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6 Bank Street,
Manchester, both in the County of Lancaster, and 323 High Holborn in the
County of Middlesex, Civil Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Accumulator plates with cells or compartments as hitherto constructed do not
provide for the active substance sufficient contact surface to give it all the necessary
cohesion, whereby it results that after a relatively short time of working, this
substance disintegrates, and becomes detached from the plate which supports it,
which entails for its maintenance frequent and costly repairs. This improved
construction allows of this drawback being remedied. The plates are cast in two
grated faces held apart, and rendered solid by cross-pieces which are also cast at
the same time with the said plates.
By this means the grate possesses great mechanical solidity, and the active
substance forms in the whole of the interstices, a continuous and coherent mass,
which is perfectly retained in the plate. This new method of construction further
allows of these plates being very easily cast in a metallic mould, the interior casting
core being able to be withdrawn without difficulty.
In order to enable the invention to be better understood reference will now be
made to the accompanying drawing on which-
Figure 1 is a front sectional elevation of an accumulator plate constructed on
this improved method.
Figure 2 is a sectional elevation of same made on the line CCD H¹ of Figure 1.
Figure 3 is a sectional view of part of the plate, taken on the line I of
Figure 1.
The plate P formed preferably of antimoniated lead, presents as a whole two
grated parallel walls provided with cross pieces as the section B C D D', and
Figures 2 and 3 show on a median vertical line, and three horizontal lines, an
upper, a lower, and a middle one.
Between these crosspieces and the grated walls, the casting cores are placed
during the casting of the plate, and they can be easily withdrawn after the casting,
by means of the lateral openings. A certain number of holes A arranged in the
walls of the plates are intended to receive a piece formed of some suitable insulating
material, which projects slightly beyond the two sides of the plate and by so
projecting serves to insulate from one another, the positive plate from the negative
plate, maintaining them at a suitable distance apart.
By this improved construction the active substance is not only lodged in the
various cells contained in the plates, but it also forms between the two walls of
each plate a compact mass. This mass is firmly retained by the projections from
the recesses of the different cells, any destruction is thus rendered impossible, such
as arises from the numerous causes of disintegration which are produced in
accumulators.
It will be understood that this improved construction may be employed, whatever
may be the active substance, or the constituent substances employed in the
manufacture of the plates, this construction being possible wherever any suitable
fusible material can be used.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what mauner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is-
1. Improvements in the construction of plates for accumulators or secondary
batteries consisting in casting the plates with two or more grated faces held apart
and rendered solid by means of cross pieces cast at the same time with the above
named plates, substantially as herein before described and shown on the accompanying
drawing.
2. The improved system of accumulator plates having two or more grated faces
held apart and rendered solid by cross pieces suitably arranged, substantially as
hereinbefore described.
Dated this 6th day of November 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant.