Improvements in Electric Accumulators or Storage Batteries.
Year: 1895

page_text: Date of Application, 20th Nov., 1895-Accepted, 28th Dec., 1895
COMPLETE SPECIFICATION.
Improvements in Electric Accumulators or Storage Batteries.
We, THOMAS WILLIAM ALLAN, of 9, Smith Street, Kennington, S.E.,
Electrician, ARTHUR POWELL, of Ivy Lodge, Champion Hill, Gentleman, and
CHARLES JOHN TIBBITS, of 20, Grove Hill Road, Denmark Hill, in the County
of Surrey, Gentleman, 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, and accompanying drawing, that
is to say:
Our present invention relates more especially to the electrodes or plates used in
the construction of electric accumulators or storage batteries. Such plates as
heretofore ordinarily made have consisted of cast plates having perforations or
openings through them in which the filling or active material is placed. It has also
been proposed to use for the purpose two or more grated faces held apart and stayed
by cross pieces cast with them; but such plates have been found too heavy, as well
as difficult to cast and to fill with the required filling.
By our present invention the plates or cells are comparatively light but strong
and easily made and filled.
The accompanying drawing is in illustration of our invention,
Figure 1 being a front view, Figure 2 a vertical transverse section, Figure 3 a
side view, and Figure 4 a separate section through the edge of the plate, on the
line -y, Figure 1. Figure 5 is a view from above.
The plate or cell is cast in one piece in lead or other suitable metal or alloy,
such for instance as antimoniated lead, and it consists of an outer frame or edge
recessed on the inside, as shewn in Figure 4, of rectangular or other suitable shape,
and of the desired width, the side flanges being connected together by plates, or
stays, b, b, cast with the ridge, so as to form openings in the sides, which may be of
any desired number, and more or less rectangular as shewn, or of any other
convenient shape.
The sides of the outer frame, as well as its outer edge, have openings c, c, through
them, so arranged in position that they may be as many in number, or including as
much area as is conveniently possible without too much affecting the strength and
rigidity of the frame, and these openings are preferably made bevelled at their
edges as shewn, so that they are of larger area at their outer than at their inner
surface. The active material or filling is pressed in the usual way into the metal
cell formed as described and shewn.
The lower edge of the cell is shewn open, for the convenience of easily with-
drawing the core upon which the plates are cast, the bevelled edges of the
openings c c also facilitating the fitting together and withdrawal of the parts of
the metallic mould, in which the improved cell is cast. This lower open edge may
afterward be closed if desired. The projection dis to be used to form a connection.
The corners of the plates at a are preferably left, as shewn, without openings
through them, great strength and rigidity being thus obtained.
We do not confine ourselves to the precise form or proportions of the several
parts, which may be varied more or less as may be found desirable, but
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 :-
The plates for electrical accumulators or storage batteries, cast in one piece and

page_text: consisting of a hollow external frame recessed inside and having its side flanges
connected by bars or plates 5, the side flanges and outer edges of the outer frame
being also provided with openings c, bevelled at their edges, substantially as and
for the purposes described and illustrated.
Dated this 20th day of November 1895.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicants.