The battery consists of lead electrodes, anode and
cathode being of the same character. They are constructed of narrow
ribbons of lead, each element being made from long lengths of the ribbon
about or nearly 0.20 in. width, rolled together into a flat cake like
rolls of narrow webbing, as illustrated by the annexed diagram, Fig.
1, the greater part of the ribbon being very thin and flat; but
intermediate thicker ribbons are also employed, as in Fig. 2, this
thicker ribbon being corrugated as shown, and affording passage room
for the circulation of the electrolyte. From four to eight coils of the
plain ribbons are between every pair of corrugated ribbons. They are
wound up together tightly, and pressed into the nearly rectangular form
shown. The bar for suspending the coil plates so made in the cells is
soldered to the coil. The object of this construction is of course to
obtain large lead surface, and of course a much larger surface is so
obtained than could be practically obtained from plain lead plates in
the same compass.
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