In this class, the following terms are used with the meanings indicated:
"Primer" effects the first explosive step in the sequence of explosion.
"Percussion cap" — a primer which is struck to explode.
"Igniter" effects the first spark-producing or heat-producing step but may not be explosive.
"Firing-means", "initiator" (used respectively in the arts of weaponry and blasting) — the device acting directly on the primer, which device may or may not form part of the fuze.
"Detonator charge" — a charge used to amplify the explosion of the primer.
"Fuze" — an assembly which determines the moment of the explosion (instantaneous or delayed) and which incorporates firing-means for initiating the explosion spark.
"Ammunition" covers expulsion charge and projectile whether or not forming a single body, unless otherwise made clear. [2]