Improvements in Plates or Elements for Secondary Electric Batteries.
Year: 1893

page_text: Date of Application, 6th July, 1893
Complete Specification Left, 6th Apr., 1894-Accepted, 12th May, 1894
PROVISIONAL SPECIFICATION.
Improvements in Plates or Elements for Secondary Electric
Batteries.
We, THE LITHANODE AND GENERAL ELECTRIC COMPANY LIMITED of
11 Abchurch Lane in the City of London and JOB THOMAS NIBLETT of
64 Millbank Street in the City of Westminster Electrical Engineer do hereby
declare the nature of our invention to be as follows:-
This invention has for its object to provide plates or elements for secondary
electric batteries in which the active material or material to be rendered active
(we will refer to it generally for the purposes of description however as the active
material) is very firmly secured in place in the metallic containers and conductors
and in which the said active material and the said containers and conductors are
so relatively arranged that whilst a considerable surface of the metal is presented
to the active material the surface of metal exposed at the surface of the plates or
elements may be very small. According to this invention the active material
which is employed is in the form of plates slabs or pellets and is of a coherent
nature being preferably that which is known as "lithanode." The plates slabs or
pellets are preferably made of considerable size and may be of any desired shape
such as square, hexagonal triangular or like shape and around the edges of each
plate slab or pellet grooves recesses or holes are formed so that when the requisite
number of such plates slabs or pellets are placed together and the metal of the
container or support, which constitutes also the conductor, is cast therearound the
metal enters the grooves recesses or holes and firmly binds the plates slabs or
pellets together. The grooves around the edges may be angular or rectangular
or curved in form in cross section for example they may be V shaped or in the
form of rebatted grooves or holes may be bored or otherwise formed to any
desired extent inwards from the edges, or the plates or elements may be made up
of cylindrical or other shaped pieces with a hole or holes bored or otherwise
formed longitudinally through them through which the metal passes so that the
ends of the metal are in connection with the external metal constituting the
combination of the conductors from and to the elements. Where it is desired to
provide the plates or elements with a more extended system of conductors the
plates slabs or pellets may have grooves formed in their faces, preferably on both
faces with holes extending from the grooves on one face to the grooves on the
other face so that the metal when run in fills these grooves and connecting holes or
recesses may be made in the edges of the plates slabs or pellets extending from
face to face of the said plates slabs or pellets and in connection with the aforesaid
grooves or the like in the said edges.
Dated the 6th day of July 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.

page_text: Improvements in Plates or Elements for Secondary Electric
Batteries.
We, THE LITHANODE AND GENERAL ELECTRIC COMPANY LIMITED of
11 Abchurch Lane in the City of London and JOB THOMAS NIBLETT of
64 Millbank Street in the City of Westminster Electrical Engineer 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 has for its object to provide plates or elements for secondary
electric batteries in which the active material or material to be rendered active
(we will refer to it generally for the purposes of description however as the active
material) is very firmly secured in place in the metallic containers and conductors
and in which the said active material and the said containers and conductors are
so relatively arranged that whilst a considerable surface of the metal is presented
to the active material the surface of metal exposed at the surface of the plates or
elements may be very small. According to this invention the active material
which is employed is in the form of plates slabs or pellets and is of a coherent
nature being preferably that which is known as "lithanode." The plates slabs or
pellets are preferably made of considerable size and may be of any desired shape
such as square, hexagonal, triangular or like shape and around the edges of each
plate slab or pellet grooves recesses or holes are formed so that when the requisite
number of such plates slabs or pellets are placed together and the metal of the
container or support, which constitutes also the conductor, is cast therearound the
metal enters the grooves recesses or holes and firmly binds the plates slabs or
pellets together. The grooves around the edges may be angular or rectangular or
curved in form in cross section for example they may be shaped as shewn in
Figure 1 of the accompanying drawings or in the form of rebatted grooves as
shown in Figure 2 or holes may be bored or otherwise formed to any desired extent
inwards from the edges as shewn in Figure 3 or the plates or elements may be
made up of cylindrical or other shaped pieces a as shewn in section in Figure 4
and in plan in Figure 5 with a hole or holes bored or otherwise formed longitudinally
through them through which the metal conductors 6 pass so that the said metal
conductors are perfectly protected from the action of the electrolyte. The ends
of the metal conductors are connected with the external metal constituting the
conductors from and to the elements. Where it is desired to provide the plates or
elements with a more extended system of conductors the plates slabs or pellets may
have grooves e formed in their faces as shewn in plans and sections in Figures 6
to 9 preferably on both faces and if desired with holes d extending from the
grooves in one face to the grooves in the other face so that the metal when run
in fills these grooves and connecting holes or recesses may be made in the edges of
the plates slabs or pellets extending from face to face of the said plates slabs or
pellets and in connection with the aforesaid grooves or the like in the said edges.
Such holes or recesses are shewn at e in Figure 10. We do not bind ourselves to
the precise forms shewn for example in Figures 11 and 12 we have shewn shapes
which may take the place of the cylinders shewn in Figures 4 and 5.
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. Secondary battery plates or elements formed of active material (or material
to be rendered active) with grooves, recesses, or holes, around the edges for the
reception of the metal substantially as hereinbefore described.

page_text: 2. Secondary battery plates or elements formed of active material (or material
to be rendered active) with grooves in their faces as described with reference to
Figures 6 to 9 of the accompanying drawings.
3. Secondary battery plates or elements formed of active material (or material
to be rendered active) with grooves on both faces connected by perforations d
substantially as herein before described and illustrated by Figures 6, 7 and 8 of the
accompanying drawings.
4. Secondary battery plates or elements constructed substantially as herein
before described with reference to Figures 4, 5, 11 and 12 of the accompanying
drawings.
1
2
11004
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, Agents.