The battery rapidly weakens on open circuit, but quickly recuperates.
There is another form of this battery, termed the agglomerate battery.
(See Battery, Leclanché Agglomerate.)
Fig. 46. LECLANCHÉ BATTERY.
Battery, Leclanché Agglomerate.
A form of the Leclanché in which the porous jar is suppressed. Cakes
made of a mixture of carbon, 52 parts; manganese binoxide, 40 parts; gum
lac, 5 parts; potassium bisulphate, 3 parts, compressed at 300
atmospheres, at a temperature of 100° C. (212° F.), are fastened by
India rubber bands or otherwise against the carbon plate. These
constitute the depolarizer. Various shapes are given the carbon and
depolarizing agglomerates.
Battery, Local.
A battery supplying a local circuit (see Circuit. Local). The current is
governed by the relay situated on the main line and operated by its
current.
Battery, Main.
The battery used in operating the main line. It is usually applied to
telegraphy. Its function is then to supply current for working relays,
which in turn actuate the local circuits.
Main and local circuits and batteries are also used in the automatic
block system of railroad signalling.