Delay fuze for explosive charge

Ammunition and explosives – Igniting devices and systems

Patent

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Details

102256, 102255, F42B 1502, F42B 1536

Patent

active

042200911

ABSTRACT:
An explosive hand grenade comprises a hollow spherical shell having a sin opening surrounded by a tubular hub, a tubular housing threaded into the hub and extending into the shell, a barrier plate with an eccentric hole closing the inner end of the housing, booster cup attached to the housing and extending beyond the plate to form a booster charge cavity, a rotatable mandrel in the housing, next to the barrier plate, having an eccentric passage therethrough out of alignment with the barrier plate hole in a first position, a bushing fixed in the housing, next to the mandrel, having a passage aligned with the mandrel passage, a unitary combustible delay cord extending through both passages and preventing rotation of the mandrel, an igniter and a striker therefor for igniting the end of the cord remote from the barrier plate, manually-releasable means for initially preventing rotation of the mandrel and operation of the striker until the grenade is thrown, and a torsion spring for rotating the mandrel, after the cord has burned to the junction of the two passages, from the first position to a second position aligned with the barrier plate hole, to initiate the booster charge.

REFERENCES:
patent: 2872866 (1959-02-01), Brown et al.
patent: 3313236 (1967-04-01), Lohmann
patent: 3340810 (1967-09-01), DiPaola

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