After-firing safety device in a projectile with percussion fuze

Details After-firing safety device in a projectile with percussion fuze After-firing safety device in a projectile with percussion fuze

1989-06-06

1990-07-03

Brown, David H.

Ammunition and explosives

Igniting devices and systems

Arming devices

102233, 102240, 102257, F42C 1504, F42C 1520

Patent

active

049381393

ABSTRACT:
An after-firing safety device in a projectile with percussion fuze includes a spiral spring set having at least three springs wound up in series with respectively opposite directions. The spring set, maintained under tension by a cage, starts to uncoil as soon as the cage slides off the spiral spring set on account of the acceleration of the projectile during firing. The time elapsing until a central aperture has been entirely vacated depends on the number of springs, the spring lengh, the spring tension, and the friction characteristic. The after-firing safety device is equally well suited for spinning projectiles as well as nonspinning projectiles.

REFERENCES:
patent: 3030886 (1962-04-01), Junghaus et al.
patent: 3249051 (1966-05-01), Kaiser
patent: 4026216 (1977-05-01), Backstein
patent: 4458594 (1984-07-01), Weber et al.
patent: 4510869 (1985-04-01), Nicolas et al.
patent: 4662279 (1987-05-01), Popovitch

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