An Improved Secondary Battery Plate.
Year: 1897

page_text: Date of Application, 16th Jan., 1897
Complete Specification Left, 15th Nov., 1897-Accepted, 18th Dec., 1897
An Improved Secondary Battery Plate.
HENRY WILLIAM HANDCOCK & ALFRED HERBERT DYKES both of 5 Victoria
Street Westminster S.W. Engineers do hereby declare the nature of this inven-
tion to be as follows:-
Our invention relates to a secondary battery plate so constructed as to over-
come the difficulty of buckling to which so many existing forms are liable.
Existing methods may be briefly described as follows: (1) Lead compounds are
compressed into grids of inactive material and then "formed" (2) Lead plugs are
inserted into grids and moré securely fixed in position by the expansion due to
forming" (3) Whole lead plates with a suitable surface are formed" direct,
dispensing with the use of a grid.—
66
Our method, which has given excellent results, consists in taking a number of
miniature lead plates each about one square inch area on each side, about 1" over
all thickness and having a surface corrugated or fluted or cross corrugated or
fluted regularly or irregularly and arranging them so that their disposition cor-
responds to that of the plugs in pasted plates. We then cast a grid of inactive
material such as lead antimony alloy round the miniature plates, the result being
a full sized plate consisting of lead plugs in an inert grid and in which intimate
contact is secured between the grid and the lead plugs.
The completed plate can then be formed by any suitable method.--
Dated this 16th day of January 1897
HENRY WILLIAM HANDCOCK.
ALFRED HERBERT DYKES.
We, HENRY WILLIAM HANDCOCK and ALFRED HERBERT DYKES both of
5 Victoria Street Westminster, S.W. Engineers 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:-
Our invention relates to a secondary battery plate so constructed as to over-
come the difficulty of buckling to which so many existing forms are liable.
Existing methods may be briefly summarized as follows:-(1) Lead compounds
are compressed into grids of inactive material and then "formed." (2) Lead
plugs are inserted into grids and more securely fixed in position by the expansion
due to "forming." (3) "Whole lead plates with a suitable surface are
direct, dispensing with the use of a grid.
formed"

page_text: Our plate, which has given excellent results, is made by taking a number of
miniature lead plates or plugs capable of being formed" and of suitable surface
for that purpose, and arranging them so that their disposition corresponds to that
of the plugs in pasted plates. The surface, size and contour of the miniature
plates or plugs may be varied considerably according to the fancy of the designer,
so long as each is so small as to prevent the buckling or racking of the completed
plate when at work: we have found it convenient to make them of about one
square inch area on each side and about one quarter of an inch thick. When
the miniature plates have been arranged as explained above we cast around them
so as to bring them all into metallic contact and bind them into one intimate
whole, a grid of inactive material such as lead antimony alloy or any metal such
as is used by battery makers for the grid or comparatively inactive part of the
ordinary secondary battery plate. We then "form" the completed plate by any
suitable method. The miniature lead plates or plugs are not necessarily of one
single piece, but may consist of laminae or be of any other construction found
expedient for the purpose. The inactive material of which the grid consists is
not necessarily not acted upon in the "forming" solution, and in the case of
positives the grids may be cast somewhat heavy and the peroxide where incon-
veniently thick, be stripped off or allowed to rack off afterwards; the term
inactive refers rather to the action of the grid when in work after the forming
has been completed.-.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1
(1) A grid plate of the nature herein disclosed for forming for secondary
HENRY WILLIAM HANDCOCK.
ALFRED HERBERT DYKES.