Pyrotechnic noisemaker

A noisemaking device comprising:

• a container having a constriction for passage of explosive gas out of said container;
• an explosive charge inside said container comprised of particles detonatable on impact, the size of said particles being greater than that of said constriction and blocked from passage therethrough during quiescence, said constriction being expandable under pressure of gas produced by detonation of the explosive charge;
• the wall of the container having strength sufficient to withstand without rupture the explosive forces produced within the container upon detonation of said explosive charge;
• said container being an elongated thin-walled tube closed at one end and twisted about its longitudinal axis to produce said constriction in the wall thereof.

A noisemaker comprising:

• an elongated device of lightweight thin material having a generally closed explosive chamber with an impact wall at one end and an exhaust opening at the opposite end, and an integral elongated open passageway directly communicating with said chamber opening and projecting from said chamber away from said impact end for exhausting explosive gas from said chamber;
• an explosive charge within said chamber comprised of particles having an explosive coating detonatable on impact to produce an explosive force of a certain magnitude, said particles being larger than said exhaust opening and thereby blocked from passage therethrough during quiescence;
• the wall of said chamber having strength sufficient to withstand without rupture said explosive forces upon detonation of said explosive charge and exhausting of said gas through said opening;
• said particles having a substantial mass to provide a heavy impact end to said device at said chamber and tending when propelled through the air to give said device a ballistic characteristic so as to impact against a chosen object;
• whereby the explosive gases are exhausted through the constricted open passage at the opposite end, and said particles are safely retained within said chamber.

A noisemaking device comprising:

• a thin-walled chamber;
• a small explosive charge inside said chamber formed of particles having an explosive coating detonatable on impact;
• said chamber being generally closed and having an exhausting opening through the wall thereof of size less than that of said particles to block passage thereof during quiescence;
• the quantity of said coated particles being less than about 1 gram with the ratio of explosive coating to particles being within the range of up to about 2% by weight;
• whereby said device may be safely handled and is effective to produce a substantial noise upon detonation.