The invention relates to a pyrotechnic smoke screen unit for producing an aerosol which is impenetrable in the visible, infrared and millimetric wave range and used for camouflage and decoy purposes. The units are obtained by combining fibre-like conductive dipoles or dipole precursors which become conductive in situ and conventional pyrotechnic smoke substances active in the visible and infrared range.

A fireball generator device comprising a steel cylindrical main housing having first and second threaded end caps. A shotgun shell is encased in a barrel member and locked in place with a screw-on housing. When the shell is fired, the gases expelled by the shell push a knife blade forward into a gas container positioned within the main housing. The moving knife blade ruptures the gas container and the gas therein escapes and the powder gas from the shotgun shell ignites the gas escaping from the container creating various visual effects, such as a fireball.

A fireworks artillery shell for use as a consumer firework which may be propelled by the use of a mortar is provided which includes a casing, a lift charge, an effects charge, a timing fuse and an ignition fuse, and seals. The seals are provided within the casing above and below the effects charge to increase the burst effect of the effects charge. The lift charge is positioned within the casing and below the lower seal, and upon ignition, lifts the fireworks artillery shell into the air. The seals promote a harder break and more explosive effect from the effects charge without interfering with the lifting charge.