Actuating cartridge, explosive

When immersed in water, the explosives in water-activated contrivances are initiated by electric current as water (acting as an electrolyte) immerses the electrodes of specially designed batteries by chemical reaction with water and by pressure sensors triggered at certain depths. These contrivances include ammunition, signal flares and other pyrotechnics, sounding devices (which are dropped by ships to determine depth), and actuating cartridges for gas cylinders that automatically inflate life rafts and jackets. 

Explosive Starter. A device, used to start diesel engines consists of a cartridge-actuated device 1 (CAD), inserted in the head oi one of the cylinders. On detonation of cartridge a shock (kick)is produced which pushes the piston down and starts the whole engine Note CAD s ate described m Vol 2 of Encycl pp C70-R to C72-R... 

Refs l)Glossary of Ord (1959), 91-L 2)En-cyclopedia of Explosives, Vol 2, p C72-L, under Cartridges 3)R.A.Kaufmann J.H. Daniels, Development and Qualification of Delay Elements, Propellant Actuated Device XM48, XM49, and XM50 , FA (Frankford... 

Cartridges, actuating, for aircraft ejector seat catapult, fire extinguisher, canopy removal or apparatus, see Explosive Articles, p.69 Cartridges, actuating, for fire extinguisher or apparatus or apparatus valve, see Explo-... 

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