Consumable flash tube

Details Consumable flash tube Consumable flash tube

1982-03-15

2010-10-12

Eldred, J. Woodrow (Department: 3641)

Ammunition and explosives

Igniting devices and systems

Propellant ignitors

C102S202200

Reexamination Certificate

active

07810429

ABSTRACT:
A consumable flash tube for encapsulating igniter material in the propellant beds of propelling charges or rocket motors. The flash tube is constructed of a combustible, plastic material such as cellulose nitrate plastic or ethyl cellulose plastic. The combustible material is furnished with a filler of electrical charge dissipating material which renders the flash tube conductive. The conductive flash tube functions as an environmental housing and additionally as a grounded electrical conductor or Faraday shield so as to bleed off any inadvertent electrical charge presented to the flash tube and thus limit the charge transferred to the igniter material. Formation of the flash tube is by continuous extrusion of a mixture of the plastic material and electrical charge dissipating material into the shape of a hollow tube. After curing of the extruded tube, one end of the tube is flared to allow joining of the tube to a primer after the igniter material is positioned in the flash tube.

REFERENCES:
patent: 2436826 (1948-03-01), Regad et al.
patent: 3151447 (1964-10-01), Bornstein
patent: 3182595 (1965-05-01), Hassmann
patent: 3392673 (1968-07-01), King
patent: 3645206 (1972-02-01), Quinlan et al.
patent: 3696749 (1972-10-01), Scanlon
patent: 3828676 (1974-08-01), Junker

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