Ammunition and explosives – Igniting devices and systems
Patent
1975-06-04
1976-12-07
Tudor, Harold
Ammunition and explosives
Igniting devices and systems
102 76R, F42C 100
Patent
active
039955567
ABSTRACT:
An improved percussion fuse for a mortar or similar explosive munitions shell is described. The fuse body that interconnects the charge-carrying shell body with the shell head disposed forwardly thereof has a sleeve portion in which a radial bore is disposed. A conventional impact member that carries the percussion fuse and that is slidable axially within the sleeve has a mating, V-shaped groove that cooperates with the bore in the sleeve to normally retain a locking sphere therein; such locking sphere normally prevents the forward movement of the impact member against the primer that is carried at the rear portion of the shell head. An easily puncturable, membrane-like closure member is disposed over the bore in the sleeve portion of the impact member to retain the blocking sphere in its seated position after the shell cartridge has been separated from the shell during the firing operation. During deceleration of the fired shell, the groove in the impact member moves forwardly to cam the captured blocking sphere in a radially outward direction, whereupon the latter punctures the closure member and escapes. Accidental detonation of the fired shell during an initial portion of the shell trajectory is prevented by the provision of a pair of offset recesses in the confronting surfaces of the impact member and the shell head, the radial interface between such recesses serving to prevent the percussion cap in the impact member from contacting the primer.
REFERENCES:
patent: 2487056 (1949-11-01), King
patent: 2981192 (1961-04-01), Grandy
patent: 3576165 (1971-04-01), Gawlick
patent: 3623432 (1971-11-01), Schminke
patent: 3724385 (1973-04-01), Beatty
Hanns-Juergen Diederichs KG
Tudor Harold
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