Projectile fuze

Details Projectile fuze Projectile fuze

2003-02-27

2009-02-17

Hayes, Bret (Department: 3641)

Ammunition and explosives

Igniting devices and systems

Arming devices

Reexamination Certificate

active

07490551

ABSTRACT:
Fuze including safety element (30) includes an acceleration detector (31) that acts on a timer (32) coacting with a primer housing rotor (14). Rotation of the rotor can be halted by a second safety device (35) responsive to the dynamic pressure generated by the speed of the projectile (11) in flight. For this purpose, the device includes a diaphragm (36) engaging a flexible blade (51) to space apart the end (55) of the blade and the rotor when the dynamic pressure has a predetermined value, whereby a primer (18) can be moved into line in the explosive train. When the dynamic pressure is too low, the end (55) stops the rotor (14) from rotating and the firing procedure is also blocked in a notch in the rotor (14). The resulting fuze thus has highly reliable dual safety element responsive to two separate physical phenomena and having a simple construction.

REFERENCES:
patent: 3382805 (1968-05-01), Swaim
patent: 3804020 (1974-04-01), Norton
patent: 3927617 (1975-12-01), Hoelzen et al.
patent: 3961577 (1976-06-01), O'Steen
patent: 4002123 (1977-01-01), Fisher
patent: 4188886 (1980-02-01), Brauer et al.
patent: 4380197 (1983-04-01), Eaton
patent: 4526104 (1985-07-01), Leach
patent: 4932325 (1990-06-01), Hutter
patent: 650 330 (1985-07-01), None
patent: 693 116 (2003-02-01), None

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