To Recharge This Cell - Fill With Water
The "H2O" Cell, as it is termed by its English sponsors, was
introduced to meet the demand for a wet cell smaller and more
compact than the "Leclanche," and in this respect it appears to
have gained its advantage. This cell may he stored for any length
of time and in any climate without any deterioration. It is not
liable to creeping or evaporation while in use. Its internal
resistance is low, and it does not polarize in use so quickly as
wet batteries of the "Leclanche" type, it is claimed.
The addition of water only is needed for charging, and its active
life is equal to any high-grade cell of similar size. If the cell
is required for instant use, it is recommended that the cell be
filled with warm water; distilled water being used, if possible, as
this tends tn prolong the life of the cell by reason of the absence
of iron or lime impurities, which are Frequently found in hydrant
In order that the condition of the zinc electrode and the interior
parts of the cell may be examined, the container consists of a
clear glass jar. A. ( See diagram.) Into the bottom of this jar
some bitumen is poured while in a hot condition. This serves to fix
the porcelain base, B, in position.
This base forms the support for the sack, C, keeping it in a
central position, and also a support and spacer for the zinc
cylinder, D, keeping it always the correct distance from the sack.
It is this narrow space between the zinc and the sack which, to a
large extent, makes the internal resistance of these cells so much
less than Lechanche batteries. The top of the sack has a rubber
ring, E, round it in order to further safeguard against the zinc
cylinder touching the sack. Above the sack a specially shaped
porcelain ring, F, is slipt over the carbon rod. G, and this serves
as a support for a waxt cardboard disk, H, which supports the
sealing compound. Two holes are arranged in the sealing compound
and the cardboard washer ; in one of these is a fiber tube. This
tube forms the funnel thru which the water is poured when the cell
is required for use, and is normally sealed with a cork. The other
hole contains a small glass tube to allow the gases generated when
the cell is in action to escape. A lead connection strip, J, is
soldered to the zinc cylinder, and this is brought up at the side
of the cardboard washer and thru the sealing compound.
This lead strip is provided with a punched hole to allow of
connection to an adjacent battery. A brass cap. K, is forced on to
the carbon rod, and the nut for wire connections screws on to a pin
riveted and soldered, to the cap. The ammonium chlorid crystals, L,
are placed in the cell at the time of manufacture: so that all that
is ecessary to make the cell ready for use is to remove the cork,
fill the cell with water, and replace the cork.
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