Improvements in or relating to Secondary Batteries.
Year: 1894

page_text: Date of Application, 5th Feb., 1894
Complete Specificati
n Left, 18th Oct., 1894-Accepted, 24th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Secondary Batteries.
I, CHARLES JAMES HALL, of 207 Hyde Park Road, Headingly, Leeds, in the
County of York, Electrical Engineer, do hereby declare the nature of this invention
to be as follows:-
My improvements relate to secondary batteries, (sometimes called accumulators),
and they consist in making orifices or spaces in the plates used in such batteries,
and in forming coils or spirals of thin lead which are inserted in the said orifices or
spaces.
In carrying out my invention, I cast or otherwise form lead plates with a large
number of holes or spaces through the thickness of the plate, and the holes are
preferably placed close together. I then form ribbons or tapes of thin lead and
roll them up into coils of such a diameter that they can be inserted in the aforesaid
holes or spaces.
A paste of oxide of lead is sometimes combined with the coils, by
rubbing it into the interspaces between the layers of lead ribbon, or otherwise, in
order to assist in the electrical formation of the plates. The coils are simply
pushed into the holes, and where the batteries are exposed to vibration-as on
railways, and in launches-the end or ends of the coil are sometimes formed to
assist in retaining the coils in position, or the surrounding lead may be burred over
for this purpose.
It will be seen that each coil of thin lead ribbon presents a large surface for
electrical action, and it also admits of free expansion and contraction due to
electrical and other conditions; and the plates, and coils, are easily and cheaply
formed, and combined.
Dated this 5th day of February 1894.
FAIRFAX & WETTER,
433, Strand, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Secondary Batteries.
1, CHARLES JAMES HALL, of 207 Hyde Park Road, Headingly, Leeds, in the
County of York, 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 :-
My invention relates to secondary batteries, (sometimes called accumulators),
and they consist in making orifices or spaces in the plates used in such batteries
and inserting therein suitably formed coils or spirals of thin lead.
In the further description of my invention, reference is made to the accompanying
drawings, in which
Fig. 1 is a face view of one of the plates used in a secondary battery,
Fig. 2 is a plan of a spiral of thin lead, and Fig. 3 is a sectional elevation
through Fig. 2.
The reference letters indicate like parts, or parts having like functions.
In these drawings, a in Fig. 1 indicates a lead plate, of any suitable size and
thickness, for a secondary battery. In the plate a a large number of holes b, b,
are cast (for example) through the thickness of the plate and the said holes b are
placed as closely together as may be consistent with preserving the required
[Price 8d.1

page_text: strength of the plate a. I then form ribbons of thin sheet lead and roll
them up into coils or spirals c of a suitable diameter, and then insert them in the
holes b, b, in the plate a. The coils c are fitted closely within the holes b and so
arranged as to keep them in position. A paste of oxide of lead is sometimes
combined with the lead ribbon by coating the same, or rubbing it into the inter-
spaces between the layers forming each coil c, in order to assist in the electrical
formation of the plates. The coils c, having been made to suit the size and shape
of the several orifices are simply pushed into the holes b, and each plate a is then
treated and placed within the battery in the well known manner.
Where the batteries are exposed to vibrations, as on tramways, railways,
launches, or the like, the end or ends of each coil may be formed to assist in
retaining it in position; or the surrounding lead of the plate is sometimes burred
over or caulked for this purpose. I do not confine myself to any particular form of
hole, as it will be readily seen that this may be varied without departing from the
nature of the invention, and that a corresponding form should be given to the
outline of the coil c.
It is further to be noted that each coil of thin lead ribbon presents a large
surface for electrical action, and also admits of free expansion and contraction due
to electrical and other conditions. The plates a, with the holes b, are conveniently
formed by casting or other suitable operation; and, together with the coils, are
cheaply and readily made and combined.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is ;-
1. A. secondary battery plate having numerous holes or spaces therein, combined
with coils or spirals of thin lead ribbon inserted in the said holes or spaces,
substantially as and for the purpose herein described.
2. A secondary battery plate a having holes b, and rolled up ribbon coils C, made
and combined substantially as and for the purpose herein described and illustrated
in the drawings.
Dated this 18th day of October 1894.
FAIRFAX & WETTER,
433, Strand, London, Agents for the Applicant.