Self-levitating signal cartridge
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsLeonard R. Ambrosini, Raymond S. Isenson
Life of this patent
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Abstract
A pyrotechnic signal cartridge comprising a cartridge case, a projectile e detachably secured to the cartridge case, a charge in the cartridge case for launching the projectile case, rocket motor thrust means positioned within the projectile case, a rocket motor propellant charge and a pyrotechnic signal charge in the projectile case, ignition means for the pyrotechnic signal charge and the rocket motor propellant charge whereby ignition of the pyrotechnic signal charge and the rocket motor propellant charge after launching of the projectile case provides a self-levitating pyrotechnic display.
Claims2
In a pyrotechnic signal cartridge comprising:
- a. a cartridge case,
- b. a projectile case detachably secured to said cartridge case,
- c. a projectile initial propulsion charge in said cartridge case for launching said projectile case,
- d. a rocket motor means, including a plurality of rocket nozzle ports, closure means for said ports positioned within said projectile case, a solid pyrotechnic signal composition, and a solid rocket motor propellant composition,
- e. ignition means including an ignition composition and a delay column for said solid pyrotechnic signal composition and said solid rocket motor propellant composition, wherein the improvement comprises, said solid rocket motor propellant composition and said solid pyrotechnic signal composition present in admixture in said projectile case and wherein said compositions present in admixture have a conical configuration with diameter gradually decreasing with distance from said rocket nozzle parts such that burning of said compositions in admixture after launching of said projectile case balances the thrust of the rocket motor means against the mass of the cartridge providing a thrust-to-weight ratio of approximately unity which effect causes a self levitating display.
Dependencies are inferred from the claim text.