IMPROVEMENTS IN PLATES FOR SECONDARY BATTERIES OR ACCUMULATORS
Year: 1882

page_text: LETTERS PATENT to William Taylor of Tottenham in the County of
Middlesex and Frank King of New Cross in the County of Kent Electricians
for an Invention of "IMPROVEMENTS IN PLATES FOR SECONDARY BATTERIES
OR ACCUMULATORS"
PROVISIONAL SPECIFICATION left by the said William Taylor and Frank
King at the Office of the Commissioners of Patents on the 18th July 1882.
WILLIAM TAYLOR of Tottenham in the County of Middlesex and FRANK KING
of New Cross in the County of Kent Electricians "IMPROVEMENTS IN PLATES
FOR SECONDARY BATTERIES OR ACCUMULATORS "
Our invention relates to an entirely new form of plate, or electrode for secondary
batteries, the plate is composed of a continuous tape of lead by a suitably con-
structed machine the lead is cut into a tape of any width or substance and wound
into a plate at one and the same time, the manufacture or construction of the plate
is thus produced automatically the lead upon leaving the cutting tool is allowed to
pass through a vessel containing red lead, or minium mixed with sulphuric acid or
with any salts of lead or lead in a finely divided condition, by this means the tape
is covered with a thick coating. This latter operation can be dispensed with by
cutting the lead tape very thin. The advantages of our form of plate are the easy.
method of construction the great amount of working plate surface obtained; the
great number of plates that can be placed in one trough, and the ease with which
the plates can be removed and replaced in case one of the plates should in any way
become injured. The centre of the plate is a piece of lead round which the tape
is wound. When the required size is obtained a moderately stout lead frame is
shrunk round or over. The angles of the four corners of the tape made plate are
then burnt together which fastens the tape and gives it rigidity.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Taylor and Frank King in the Great Seal Patent Office
on the 18th January 1883.
WILLIAM TAYLOR, of Tottenham, in the County of Middlesex, and FRANK KING,
IMPROVEMENTS IN PLATES
of New Cross, in the County of Kent, Electricians
FOR SECONDARY BATTERIES OR ACCUMULATORS
Our invention relates to new forms of plates being plates for electrodes for
secondary batteries or accumulators which are formed by coiling tapes or strips
produced in a new form and by a cheaper, quicker, and better mode of manu-
facturing than has hitherto been adopted. In carrying out our invention we form
our improved plates by coiling special forms of tapes or bands of lead which are
cut out or from the solid, by, or in a lathe or other cutting machine such as is
hereinafter described in such manner that the surface of the band that does not
come in contact with the cutting tool shall have given to it a roughened or
cellulated surface raised by the angle at which the cutting tool is worked. The
plate constructed by coiling tapes cut in the form above mentioned is rendered
more efficient for the purpose sought to be attained, by increasing, in and by one
operation the extent of surface acted on by the electrolyte. In some cases the tape
may be cut thinner in places by adjusting the cutting tool as required, or a thin
tape or tapes may be interposed between thicker ones in making up the plate.
The plate is formed by receiving the lead tape direct from the cutting tool and
winding it (and when needed with interposed thin tapes) round a mandrel provided
with cheeks which may have either flat or corrugated surfaces thereby producing a
plate or disc with flat or uneven surfaces; the edges of the coiled tapes are fastened
at suitable parts of the plate so produced by being stamped or pressed together so
as to give stability or rigidity to the plate.
The kind of cutting machine which we find suitable for cutting the tapes or
strips of lead in the required form is constructed as follows. When the tape is to
be uniform in thickness we use an ordinary surfacing lathe the motion of the slide
rest thereof being adjusted to the thickness required-but when we require a tape
of varying thicknesses we make the feed wheel on the slide rest excentric, and give
the shaft carrying the actuating worm a rocking as well as rotating motion-and
this is readily performed by gearing, the shaft carrying the worm into the back
gearing of an ordinary lathe head such shaft being provided at the lathe head end
with a ball and socket or other suitable bearing-the end of the shaft working in
a sliding journal.
Having now described the nature of our invention and the mode of performing
it we do not claim as forming part of our present invention the cutting machine
constructed as described nor generally the making of plates of lead by coiling tapes
or strips of lead having plane or even surfaces, but what we claim is the manu
facture of our improved plates by coiling strips or tapes of lead when cut in the
the manner and for the purpose
required shape with uneven surfaces in
substantially as above described.
In witness whereof we the said William Taylor and Frank King, hav
haraunto get our hands and seals this 15th day of January A.D. 1883.