Fireworks ignition apparatus

PROBLEM TO BE SOLVED: To obtain a pyrotechnic ignition device having an ignition property needed to rapidly transmit a flame to a main filler and having enough sensitivity for ignition by a flame initiation device. SOLUTION: A tubular spiral coil 10 includes a section 15 where it reduces its outer diameter and wall thickness from an ignition initiation position 13 to a combustion direction downstream side. The configuration of the section 15 increases a speed of combustion and violence of the same. A pyrotechnic sheet including a substrate of an oxidizable polymer film coated with oxidizable metal e.g. magnesium coiled around a cruciate axial former 11. A filler may be formed by winding a sheet into a right cylindrical tubular coil and extruding the coil from the center in the direction of combustion and axially. COPYRIGHT: (C)1996,JPO