Instantaneous detonator with insert member within fuze casing

Details Instantaneous detonator with insert member within fuze casing Instantaneous detonator with insert member within fuze casing

1979-06-11

1982-05-25

Nelson, Peter A.

Ammunition and explosives

Igniting devices and systems

Electrical primer or ignitor

10220212, 10220214, 1022753, F42B 310

Patent

active

043310788

ABSTRACT:
An instantaneous detonator has a detonator casing containing a primary charge and a secondary charge with fuze wires extending from outside the casing to an electrically actuated ignitor system located in the casing. An insert member is positioned in the detonator casing. This member has a continuous axial bore extending therethrough and includes a cross-sectional constriction. The bore is formed on one side of the constriction as a charge chamber that contains the primary charge and that faces the secondary charge and is formed, on the other side of the constriction, as a charge-free vacant chamber that faces the ignitor system. The insert member has a thick-wall section at least in that portion laterally surrounding the charge chamber, and the constriction has a configuration for preventing ignition of the primary charge by pressure forces exerted by air in the detonator casing compressed by detonation of an explosive acting on the exterior of the detonator casing.

REFERENCES:
patent: 2024586 (1935-12-01), Lednum
patent: 2986090 (1961-05-01), Doerpinghaus
patent: 3088006 (1963-04-01), Kabik et al.
patent: 3175492 (1965-03-01), Reyne
patent: 3557656 (1971-01-01), Precoul
patent: 3608492 (1971-09-01), Mitchell

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