IMPROVEMENTS IN SECONDARY BATTERIES to be as follows:-
Year: 1884

page_text: We WILLIAM TAYLOR and FRANK KING both of 67* Cowcross Street in the
City of London Electrical Engineers do hereby declare the nature of said Invention
for "IMPROVEMENTS IN SECONDARY BATTERIES to be as follows:-
"
According to our Invention we construct electrodes for secondary batteries of
flat rings or a helix or helices of lead so placed or wound as to form a cylinder or
cylinders the size and number required to give the requisite capacity to the cell.
The said rings or helices are so placed wound or formed that they afford spaces
between them for the packing of the active material.
We prefer to form each Electrode by winding a continuous tape or continuous
tapes in a spiral form with their width in the direction of a diameter of the cylinder
formed by the winding.
By this arrangement liability to buckle is obviated as in electrodes constructed
according to our Invention expansion or contraction simply results in lengthening
or shortening of the said electrodes.
Dated the 3rd day of July 1884.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields,
Agent for the said William Taylor and Frank King.

page_text: COMPLETE SPECIFICATION.
We WILLIAM TAYLOR and FRANK KING both of 67 Cowcross Street in the
City of London Electrical Engineers do hereby declare the nature of our invention
for " IMPROVEMENTS IN SECONDARY BATTERIES" and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
According to our Invention we construct electrodes, elements or plates for
Secondary Batteries, of rings, or a helix or helices of lead so placed built up
superposed, coiled, or wound upon each other, or upon themselves as to form a
cylinder or cylinders, or conical formations, the size and number required to give
capacity to the cell or battery. The said rings or helices are so placed round or
formed that they afford between them or between their convolutions spaces very
suitable for the introduction of active material. We prefer to form each electrode
by winding a continuous tape or continuous tapes in a spiral or helical form with
their width in the direction of a diameter of the cylinder formed by the winding.
By the arrangement or construction of the electrodes according to our Invention
liability to buckle is greatly obviated, and in the said electrodes expansion and
contraction simply result in the lengthening or shortening of the said electrodes.
The accompanying Drawing illustrates a battery of elements shewing one way
in which our Invention may be conveniently carried out in practice, but we do not
limit ourselves to this precise mode, as it will be evident that it can be varied
without departing from the nature of our Invention. We take a flat strip a and a
corrugated strip b and we lay them one upon the other and wind them in a helical
manner into a cylinder, the convolutions of the one strip alternating with those of
the other strip We connect the strips together in any suitable way, but preferably
by burning the lead or soldering at parts as indicated at c The electrodes thus
formed present a large acting surface and expand and contract without any
objectionable buckling. As before stated we do not limit ourselves to the precise
way of forming the electrodes as shewn in the Drawing, for example corrugated
rings and flat rings may be built up one upon the other to form the electrodes, or
a single corrugated strip may be formed into a helix, or corrugated rings may be
built up one upon the other without an intervening flat strip or flat rings. Also
we do not limit ourselves to the truly cylindrical or circular form of the electrodes
constructed according to our Invenion, although in practice we prefer that form.
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
The manufacture for, and use in, Secondary batteries of electrodes elements or
plates constructed substantially as hereinbefore described.