In the army industry, Belleville springs are used, for instance, in a number of landmines e . g . the American booster charge and main explosive filling.
2.
Because of these shortcomings, the M600 chemical fuze was removed from service around 1953 and replaced by the M603 single-impulse fuze, which used a mechanical trigger mechanism i . e . a belleville spring.
3.
Downward pressure on the spider presses down on the head of the fuze, breaks a shear pin, and inverts a belleville spring, flipping the striker downwards into a stab sensitive detonator, triggering the mine.
4.
In contrast, a purely mechanical fuze ( usually triggered via a belleville spring ) gives a much longer operational life e . g . mines planted 50 years previously will still detonate if a target vehicle drives over them ."
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