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These
are known as detonators or fog signals, which are fixed on the rails and when
an engine or vehicle passes over them explode with a loud report so as to
attract the attention of the Loco pilot.
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The
detonator consists of a metallic disc painted red and on the topside the year
of manufacture is embossed. When required to be used it shall be placed on the
rails with the label facing upwards and the metal bands are fastened around the
railhead.
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Ten
detonators are supplied in a tin case to every SM, Loco pilot, Guard,
Patrolman, Gateman, keyman etc by the respective supervisors.
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The
normal life of a detonator manufactured in the year 2010 and onwards is 5 years
from the date of manufacture. The life of detonators can be extended for a
maximum of 3 years after conducting successful test each year. TI, CRC, SMR,
and SE/P.Way may conduct test under an empty wagon moving at 8 to 10 kmph. The
inspecting officials in regard to their knowledge of the use detonators should
test staff expected to use the detonators once in three months. Detonators
shall be stored in dry places and shall not be exposed to dampness. After
completion of 8 years detonators shall be destroyed by soaking those in light
mineral oil for 48 hrs, or by detonating them under wagon during shunting
operations or throwing them into deep sea or burning them in an incinerator.
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The
detonators are chiefly used for protection of signals, and to protect trains
during accidents, obstructions etc.
