Improvements in or relating to Accumulator Plates or Electrodes for Secondary Batteries.
Year: 1897

page_text: Date of Application, 20th Mar., 1897.
Complete Specification Left, 20th Dec., 1897-Accepted, 19th Mar.,
1898
PAYPOIONAL SPECIFICATION.
Improvements in or relating to Accumulator Plates or Electrodes for
Secondary Batteries.
I, FREDERICK EDWARD EVERARD, of 59, Roden Street, Holloway, London, N.,
Electrical Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object improvements in or relating to accumulator
plates or electrodes for secondary batteries or so-called storage batteries and is as
follows:-
I arrange advantageously vertically and parallel with one another a series of bars
strips or rods of lead or antimony and lead or of any suitable material or alloy and
same are connected or in electrical connection with a horizontal conductor which I
term the "top bar" to which the usual cross-bar or any suitable connection is attached
for connecting up all the said plates or electrodes forming the battery.
These vertical bars strips or rods (which I term the main conducting bars) are
surrounded on three sides by a bordering or framework forming with the aforesaid
top bar a complete four-sided frame these three last-named sides being formed of
any suitable material or materials and of any suitable shape or shapes or forma-
tion in cross section same being advantageously formed of lead of a T-shape
in cross section with the shank of the T extending inwards on the vertical sides
and extending downwards (i.e. outwardly) along the bottom.
On these main conducting bars I string or otherwise mount in any suitable
manner a series of horizontal bars or strips (which I term "shelves") in such wise
that same are adapted and free to slide up or down vertically on or with respect
to the aforesaid main conducting bars such shelves for instance being formed with
a series of apertures therein through which said conducting bars pass while the
ends of said shelves are notched or slotted or otherwise suitably formed or adapted
to encircle or partly encircle or embrace the said vertical sides or frame or otherwise
be guided or steadied therein in suchwise that said shelves are adapted to slide
on or with respect to such vertical sides or left free so to do.
Now in order to space and keep these shelves apart equi-distant or approxi-
mately so and also in order to permit swelling or expansion (or what is known as the
"growth") I provide blocks supports or distance pieces between said shelves and
arranged and mounted in suchwise that the shelves remain unconnected to one
another.
According to my present invention I find it very advantageous to employ short
lengths of tube advantageously cylindrical tubes of or about the width of the
aforesaid shelves with respect to which these tubes are mounted at right angles
(i.e. so that the openings through said tubes are at right angles to the vertical
plane of the side face of said plate or electrode) and thus the ends of said tubes will
lie in about the same vertical plane as the side edges of the said shelves.
These tubes (or other distance pieces) are grooved or so formed on the exterior
thereof as to be adapted to fit on or be guided by and-upon the aforesaid main con-

page_text: ducting bars between which they are mounted-the cylindrical shape of same when
used forming a very strong support.
Any suitable number of said tubes or distance pieces may be used as desired
either in two or other suitable number of columns or otherwise arranged and
disposed as desired.
The aforesaid shelves and the aforesaid tubes or distance pieces may be made
of any suitable material or materials for instance vulcanite.
The spaces or interstices of the grid or support thus formed (except the tubes
aforesaid) may be filled or pasted or plastered in with any suitable material or
composition such as is well understood-a clear space or margin being left at
the top of the main conducting bars (that is the latter are not filled quite up to the
top with shelves) so that when said paste or composition swells or grows the
said shelves and supports can move upwards therewith and thus obviate buckling
or injury of the electrodes from such cause while the aforesaid tubes through the
electrode permit free circulation of the electrolyte.
Dated this 19th day of March 1897.
39
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C., .
Agents for the Applicant.
Improvements in or relating to Accumulator Plates or Electrodes for
Secondary Batteries.
I, FREDERICK EDWARD EVERARD, late of 59, Roden Street, Holloway, London, N.,
and now of 57, Roden Street, Holloway, London, N., 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:-
This invention has for its object improvements in or relating to accumulator
plates or electrodes for secondary batteries or so called storage batteries for the
purpose of absolutely preventing the well known effect of buckling" of the
plate and so causing short circuiting and is as follows:-
"
I arrange, advantageously, vertically and parallel with one another a series of
bars, strips or rods of any suitable material or alloy preferably lead or antimony
and lead, and the same are connected, or in electrical connection, with a horizontal
conductor which I term the top bar to which the usual cross bar or any suitable
connection is attached for connecting up all the said plates or electrodes forming
the battery.
These vertical bars strips or rods (which I term the main conducting bars) are
surrounded on three sides by a bordering or framework forming with the aforesaid
topbar a complete four-sided frame, these three last named sides being formed of
any suitable material or materials and of any suitable shape or shapes or formation
in cross section, the same being advantageously formed of lead of a T shape in
cross-section with the shank of the T extending inwards on the vertical sides and
extending downwards (i.e. outwardly) along the bottom.
On these main conducting bars I string or otherwise mount in any suitable
manner a series of horizontal bars or strips (which I term "shelves") in such-wise
that the same are free to slide up or down vertically on or with respect to the afore-
said main conducting bars, such shelves for instance being formed with a series of
apertures therein through which the said conducting bars pass, while the ends of
the shelves are notched or slotted or otherwise suitably formed or adapted to encircle

page_text: or partly encircle or embrace the said vertical sides or frame or otherwise be guided
or steadied thereon in such wise that the said shelves are adapted to slide on or
with respect to. such vertical sides, or left free so to do.
1.
Now in order to space or keep these shelves apart, equi-distant or approximately
so and also in order to permit swelling (or expansion or what is known as "growth")
I provide blocks supports or distance pieces between the said shelves, and arranged
and mounted in such wise that the shelves remain unconnected to one another.
According to my present' invention, I prefer to employ short lengths of tube of
or about the width of the aforesaid shelves.
These tubes are mounted at right angles (i.e. so that the openings through the
said tubes are at right angles to the vertical plane of the side face of the said plate
or electrode) and thus the ends of the said tubes will lie in about the same vertical
plane as the side edges of the said shelves.
These tubes (or other distance pieces) which may be rectangular in form if
preferred are grooved or so formed on the exterior thereof as to be adapted to fit
on or be guided by and upon the aforesaid main conducting bars between which
they are mounted."
Any suitable number of the said tubes or distance pieces may be used as desired
either in two or other suitable number of columns or otherwise arranged or dis-
posed as desired. The aforesaid shelves and the aforesaid tubes or distance pieces
inay be made of any suitable material or materials for instance vulcanité.
The spaces or inter½s of the grid or support thus formed (except the tubes
aforesaid) may be fi or pasted or plastered in with any suitable material or
compound the same as is generally used, a clear space or margin being left at the
top of the main conducting bars so that when the said paste or compound swells
or grows" the said shelves and supports can move upwards therewith and thus
obviate buckling or injury to the electrodes from such cause while the aforesaid
tubes through the electrode permit free circulation of the electrolyte.
"
..
Figure 1 of the accompanying drawings shews an elevation of an accumulator
plate or electrode for secondary batteries "a a² a³ a" being the rectangular
frame "being the top or cross bar with a suitable connection b" for connect-
ing all the said plates or electrodes as a battery in the usual manner.
ССССССССС" are the vertical main conducting bars strips or rods;
d d d d"
"eeeee" are the shelves of ebonite or other suitable material upon which the
paste is carried but not quite to the shelf above it, leaving a space between the
paste and the shelf next above it for expansion or growth.
are the rectangular tubes of ebonite or other suitable material.
<
Figure 2 is a section through A B shewing the shelves "eeeeee" also the spaces
for expansion.
66
Figure 3 is a section C D through a space shewing the vertical conductors in
section also the rectangular distance pieces.
"Figure 4 is a plan of a shelf shewing the apertures for the conductors and side
frames.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:"
1. The use, employment and construction of an accumulator plate or electrode
for secondary batteries whereby the active material or paste has freedom to expand
or "grow" without in any way altering the shape or size of the external frame of
the support or grid and substantially as described in the accompanying drawings.
2. The use employment and construction of an accumulator plate or electrode
for secondary batteries whereby the active material is supported entirely inde-
pendent of the main conducting bars therefore permitting the said main conducting
bars to perform the work of conducting electrical current, to or from the electrode,
only and substantially as described in the accompanying drawings.
3. The use employment and construction of an accumulator plate or electrode

page_text: "
for secondary batteries whereby the active material is held in such a manner that
it has perfect freedom to expand or
"
grow without altering the disposition of
the conducting and supporting parts of the frame grid or support in any way
whatever.
Dend the oth
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