Dual-charge smoke screen shell

Details Dual-charge smoke screen shell Dual-charge smoke screen shell

1994-11-03

1996-09-03

Nelson, Peter A.

Ammunition and explosives

Pyrotechnics

Flare

102342, 102351, 102357, 102360, F42B 428

Patent

active

055513450

ABSTRACT:
A smoke screen shell is provided having a rapidly burning decoy charge that generates a spontaneous fog and a slowly burning camouflage charge that generates a lasting fog. The decoy charge and camouflage charge are fired from a canister sleeve by an ejection charge. Upon firing, pressure from the ejection charge is communicated through a channel to a relief chamber positioned between the decoy charge and the camouflage charge. This results in an accelleration difference, causing a separation and slightly different trajectories, the decoy component accelerating at a higher rate. The decoy charge takes effect in the air prior to the camouflage charge. The collocation of the spontaneous fog and of the lasting fog essentially occurs in the target. The decoy charge and the camouflage charge land within a proximity at a target area such that a collocation occurs between the spontaneous fog and of the delayed lasting fog. The ignition and relief chambers, the channel therebetween, the charges, etc. are dimensioned and configured to assure the desired proximal collocation without a mechanical connection between the camouflage charge and the decoy charge.

REFERENCES:
patent: 4436034 (1984-03-01), Jacobsen et al.
patent: 4697521 (1987-10-01), Espagnacq et al.
patent: 4726295 (1988-02-01), Embury, Jr. et al.
patent: 4791870 (1988-12-01), Simpson et al.
patent: 4838167 (1989-06-01), Prahauser et al.
patent: 4860657 (1989-08-01), Steinicke et al.
patent: 5272981 (1993-12-01), Badura et al.
patent: 5390605 (1995-02-01), Meili et al.
patent: 5445078 (1995-08-01), Marion
Norwegian Article (stamped index No. R 8000), "Instantaneous Smoke Screening Systems", by Kjell O. Jacobsen.

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