Pyrotechnic projectile for producing continuous patterns in...

Details Pyrotechnic projectile for producing continuous patterns in... Pyrotechnic projectile for producing continuous patterns in...

2000-02-24

2001-12-04

Nelson, Peter A. (Department: 3641)

Ammunition and explosives

Pyrotechnics

Firecracker

C102S336000, C102S351000

Reexamination Certificate

active

06324981

ABSTRACT:

The present invention relates to pyrotechnic projectiles intended to obtain figures, letters or any pattern in the sky using pyrotechnic means.
Bombs which depict patterns have been widely known for some years in the world of pyrotechnics and that of fireworks in particular.
The most common of these patterns is the circle, but other patterns such as triangles, several circles, figures or other shapes are also possible.
The method used to produce these patterns consists in storing stars in a bomb body in the same arrangement as the pattern itself.
These stars are agglomerates made from a pyrotechnic composition which burns with a flame colour that is characteristic of the formulation used.
When the bomb explodes, the stars are ignited and dispersed in the atmosphere and represent the desired pattern as several spots of light, each spot being made by a star.
To produce a pattern of continuous outline, it is necessary to use very small-sized stars so that a great many of them can be introduced into the bomb.
This solution is practically impossible to achieve because it becomes very difficult to ignite them. Furthermore, if it were possible, the burn time would be so short that the pattern would, mostly, escape the notice of the spectators.
The invention sets out to overcome the drawbacks of the known art by creating a pyrotechnic projectile which is capable of producing a pattern of continuous outline in the sky which is visible for long enough to be seen by the spectators.
Its subject is therefore a pyrotechnic projectile comprising a body containing a bursting charge and a combustible charge which is ignited and dispersed by exploding the bursting charge, characterized in that the combustible charge is formed of a metallic powder capable of combusting with oxygen from the air, this powder being arranged within the bursting charge in a pattern which corresponds to the shape of the firework pattern that is to be obtained in the sky.


REFERENCES:
patent: 282891 (1883-08-01), Hirayama
patent: 2402968 (1946-07-01), MacMillan et al.
patent: 3557698 (1971-01-01), Hart et al.
patent: 3951066 (1976-04-01), Schroeder
patent: 3967553 (1976-07-01), Keraus et al.
patent: 4406227 (1983-09-01), Beeker et al.
patent: 5025729 (1991-06-01), Cameron
patent: 5423264 (1995-06-01), Siegler et al.
patent: 5574248 (1996-11-01), Brown et al.
patent: 5627338 (1997-05-01), Poor et al.
patent: 6244185 (2001-06-01), Yip
patent: 34 02 121 (1987-07-01), None
patent: 33 41 052 (1992-03-01), None
patent: 2 712 682 (1995-05-01), None
patent: 614305 (1948-12-01), None
patent: 2226944 (1993-11-01), None
patent: 54369 (1966-08-01), None

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