A fireworks aerial display shell is provided with lift charges positioned at opposite ends of a casing that additionally contains an effects charge. Fuses are operatively associated with the lift charges and the effects charge in a manner to ignite the lift charges a period of time before igniting t
A fireworks aerial display shell is provided with lift charges positioned at opposite ends of a casing that additionally contains an effects charge. Fuses are operatively associated with the lift charges and the effects charge in a manner to ignite the lift charges a period of time before igniting the effects charge. When either one of the ends of the casing is placed facing a closed bottom of a launch tube of a reusable mortar, the burning lift charge at that end of the casing when ignited exerts a propelling force to propel the aerial display shell upwardly out of the launch tube to an intended height before the effects charge is ignited to create a pyrotechnic visual effects display.
대표청구항▼
1. A fireworks aerial display shell comprising: a cylindrical casing having first and second ends and defining an interior volume, said casing having an outer diameter of between 32 and 44 mm;a first lift charge positioned in the interior volume of the casing at the first end of the casing;a second
1. A fireworks aerial display shell comprising: a cylindrical casing having first and second ends and defining an interior volume, said casing having an outer diameter of between 32 and 44 mm;a first lift charge positioned in the interior volume of the casing at the first end of the casing;a second lift charge positioned in the interior volume of the casing at the second end of the casing;an effects charge positioned in the interior volume of the casing between the first lift charge and the second lift charge; andfuses operatively associated with the first and second lift charges and the effects charge in a manner to ignite the first and second lift charges less than one second apart and then igniting the effects charge a period of time after said igniting of the first and second lift charges, wherein the fuses include a lead fuse operatively connected to the first lift charge in a manner for causing ignition thereof as a result of burning of the lead fuse. 2. The fireworks aerial display shell of claim 1, wherein the period of time is between 2 and 5 seconds. 3. The fireworks aerial display shell of claim 1, wherein the fuses further include a connection fuse operatively connecting the first lift charge with the second lift charge in a manner to cause the second lift charge to be ignited as a result of ignition of the first lift charge, and a delay fuse operatively connecting the effects charge with either the first lift charge or the second lift charge to cause the effects charge to be ignited as a result of burning of the first lift charge or the second lift charge. 4. The fireworks aerial display shell of claim 3, including an outer wrap surrounding said casing, wherein said connection fuse is positioned between the outer wrap and the casing and said lead fuse extends outside said outer wrap. 5. The fireworks aerial display shell of claim 1, including a first partition extending across an inner cross section of the casing and positioned between the first lift charge and the effects charge and a second partition extending across the inner cross section of the casing and positioned between the second lift charge and the effects charge. 6. The fireworks aerial display shell of claim 5, wherein the first lift charge is positioned between the first partition and a first retaining disc extending across the inner cross section of the casing and the second lift charge is positioned between the second partition and a second retaining disc extending across the inner cross section of the casing. 7. The fireworks aerial display shell of claim 5, wherein said fuses include a delay fuse operatively connecting the effects charge with the first lift charge and extending through said first partition. 8. The fireworks aerial display shell of claim 7, wherein said first partition comprises a layer of compacted clay material. 9. The fireworks aerial display shell of claim 8, wherein the second partition comprises a layer of compacted clay material sandwiched between two discs. 10. The fireworks aerial display shell of claim 1, wherein the effects charge comprises a break charge and effects producing stars. 11. The fireworks aerial display shell of claim 1, wherein the effects charge produces upon ignition a spherical radial pattern of burning stars. 12. The fireworks aerial display shell of claim 1, wherein the casing comprises paper. 13. The fireworks aerial display shell of claim 1, wherein the first lift charge and the second lift charge comprise granulated black powder. 14. The fireworks aerial display shell of claim 1, wherein the first lift charge and the second lift charge each comprises 7 to 9 grams of black powder. 15. The fireworks aerial display shell of claim 1, wherein a total of less than 60 grams of pyrotechnics is present in the interior volume of the casing and the fuses. 16. The fireworks aerial display shell of claim 1, wherein the lead fuse is also operatively connected to the second lift charge in a manner for causing ignition thereof following lighting of the lead fuse and the fuses further include a delay fuse operatively connecting the effects charge with either the first lift charge or the second lift charge to cause the effects charge to be ignited as a result of ignition of the first lift charge or the second lift charge. 17. The fireworks aerial display shell of claim 1, wherein the casing has a longitudinal length of between 90 and 110 mm and an outside diameter of between 40 and 44 mm. 18. The fireworks aerial display shell of claim 17, wherein the casing has an inside diameter of between 34 and 36 mm. 19. A consumer fireworks aerial display shell for launching into the air from within a launch tube, said fireworks aerial display shell comprising: a cylindrical casing having first and second ends and defining an interior volume;a first lift charge comprising 5 to 10 grams of pyrotechnics positioned in the interior volume of the casing at the first end of the casing and operable to cause a propelling force to be directed toward the first end of the casing after the first lift charge is ignited;a second lift charge comprising 5 to 10 grams of pyrotechnics positioned in the interior volume of the casing at the second end of the casing and operable to cause a propelling force to be directed toward the second end of the casing after the second lift charge is ignited;an effects charge comprising 40 to 50 grams of pyrotechnics positioned in the interior volume of the casing between the first lift charge and the second lift charge;a lead fuse operatively associated with the first lift charge and the second lift charge for causing ignition of the first lift charge and the second lift charge; anda delay fuse operatively associating the first lift charge with the effects charge for causing ignition of the effects charge at least 2 seconds after ignition of the first lift charge,wherein less than a total of 60 grams of pyrotechnics is present in the first and second lift charges, the effects charge, and the lead and delay fuses. 20. A consumer fireworks aerial display shell comprising: a cylindrical casing having first and second ends and defining an interior volume, said cylindrical casing having a longitudinal length of between 90 and 110 mm and an outside diameter of between 40 and 44 mm;a first lift charge comprising 7 to 9 grams of black powder positioned in the interior volume of the casing at the first end of the casing and operable to cause a propelling force to be directed toward the first end of the casing after the first lift charge is ignited;a second lift charge comprising 7 to 9 grams of black powder positioned in the interior volume of the casing at the second end of the casing and operable to cause a propelling force to be directed toward the second end of the casing after the second lift charge is ignited;an effects charge positioned in the interior volume of the casing between the first lift charge and the second lift charge and separated from the first lift charge by a first partition extending across an inner cross section of the casing and positioned between the first lift charge and the effects charge and separated from the second lift charge by a second partition extending across the inner cross section of the casing and positioned between the second lift charge and the effects charge;a lead fuse operatively associated with the first lift charge for causing ignition of the first lift charge;a connection fuse operatively associating the first lift charge with the second lift charge to cause the second lift charge to ignite less than one second after the first lift charge ignites; anda delay fuse operatively associating the effects charge with the first lift charge for causing a delayed ignition of the effects charge after ignition of the first lift charge or with the second lift charge for causing a delayed ignition of the effects charge after ignition of the second lift charge,wherein less than a total of 60 grams of pyrotechnics is present in the first and second lift charges, the effects charge, and the lead, connection and delay fuses.
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Marietta, Michael, Fireworks aerial display shell and method of use.
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