An Improved Electrode for Secondary Batteries or Accumulators.
Year: 1889

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by WILLIAM ASAHEL JOHNSON, Electrical Manufacturer,.
and JAMES NORMAN SMITH, Electrician, both of No. 57 Adelaide Street, West in
the City of Toronto, County of York, and Province of Ontario, Canada.]
An Improved Electrode for Secondary Batteries or Accumulators.
1, GEORGE MACAULAY CRUIKSHANK, C.E. of 62 Saint Vincent Street, Glasgow, in
the County of Lanark, Registered Patent Agent and Fellow of the Institute of
Patent Agents, do hereby declare the nature of this invention and in what manner
the same is to be performed as communicated to me to be particularly described and
ascertained in and by the following statement :-
The object of the Invention is to make an electrode in which the active material
may be easily and permanently fixed into the metal portion of the electrode, and it
consists essentially, of one or more plates made of lead or other suitable material,
each plate having one or more longitudinal grooves into which the active material
may be cast, the said electrode plates being connected to one or more supporting bars,
each supporting bar having terminal ends by which the electrodes in the various cells
of the battery may be easily and properly connected together.
Figure 1, is a perspective view of the improved electrode.
Figure 2, is an enlarged cross-section of one of the electrode platos.
Figure 3, is a perspective view of a battery provided with the improved electrodes.
Figure 4, is an alternative form of electrode.
In the drawing the electrodes are shewn composed of a series of narrow plates
made of lead or any other suitable material, and soldered or otherwise rigidly connected
at each end to a metal supporting bar B, each of the said bars being shaped, as
indicated to rest upon the top of the cells and support the electrode in position. It
will be noticed that each plate A, has a series of grooves, a, made on each side of it, as
shown, so that the cross-section of the bars appears like a series of the letter H. I
consider that this is the best form of groove to make, but I do not wish to confine
myself to the exact shape indicated.
The walls of the grooves a, should be dove-tailed, so that the active material cast
into the grooves cannot fall out.
I prefer to hold the plates A, horizontally, and for that reason provide the two
bars B, as shown in figure 4, but it will of course be understood that one of the bars B,
may be dispensed with, and the remaining bar shaped so as to support the plates A,
vertically, as shown in Figure 1. When the plates A, are suspended vertically I burr
or notch the edges of the walls of each groove, so as to prevent any possible longi-
tudinal movement of the active material retained by the said grooves. These notches
or burrs are indicated by the letter & in figure 1.
With the view of increasing the rigidity of the electrode the plates A, should be
jointed together. This I effect by forming on one edge of each plate A, a dove-
tail rib d, designed to fit into the dove-tail made in the edge of the adjacent plate.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
I declare that what I claim is :
1). An electrode for a secondary battery or accumulator composed of one or more
platos of lead or other suitable material, each plate having a longitudinal groove or
grooves made in its surface or surfaces to receive and retain the active material of the
electrode; substantially as and for the purpose hereinbefore described.
2). An electrode for a secondary battery or accumulator composed of one or more
plates of lead or other suitable material, each plate having a longitudinal dove_

page_text: tailed groove or grooves made in its surface or surfaces to receive and retain the active
material of the electrode ; substantially as and for the purpose hereinbefore described.
3). An electrode for a secondary battery or accumulator composed of one or more
plates of lead or other suitable material, each plate having a longitudinal, dove-
tailed groove or grooves made in its surface or surfaces to receive and retain the
active material of the electrode, the walls of each of the grooves being burred or
notched; substantially as and for the purpose hereinbefore described.
4). An electrode for a secondary battery or accumulator composed of one or more
plates of lead or other suitable material, each plate having a longitudinal groove or
grooves made in its surface or surfaces to receive and retain the active material of the
electrode, in combination with one or more supporting bars having ends shaped to
rest upon the edge of the cell, the ends of the said bars forming terminal connections
for connecting the electrodes in the battery or cell; substantially as and for the
purpose hereinbefore described.
Dated this Twenty fifth day of November 1889.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.

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