Dual-charge smoke screen shell

US5551345A · kind A · utility

Assignees

• Buck Werke GmbH & Co. · DE
• SM Schweizerische Munitionsunternehmung AG · CH

Inventors

• Norbert Wardecki · Heuweiler, DE
• Herwig Feldmeier · March, DE

Key dates

• Filing date: Nov 3, 1994
• Grant date: Sep 3, 1996
• Expiry date: Nov 3, 2014

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42B12/48
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

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.