Electro-explosive igniters

Details Electro-explosive igniters Electro-explosive igniters

1976-05-13

1978-01-31

Pendegrass, Verlin R.

Ammunition and explosives

Igniting devices and systems

F42B 318

Patent

active

040709701

ABSTRACT:
An electrically initiated igniter having good resistance to accidental looltage triggering is disclosed. The igniter comprises a layer of pyrotechnic mixture packed between two initiating electrodes, advantage being taken of the dielectric properties of a selected component of the mixture to provide a high d.c. resistance between the electrodes, which d.c. resistance so limits the current flow through the layer, resulting from an applied electrical stimulus, as to prevent firing of the mixture at all applied voltages which are less than that at which dielectric breakdown of the layer occurs. When fired, the combustion proceeds without shattering and the igniter is particularly suitable for igniting materials requiring non-brisant initiation. A detonator capsule is also disclosed for attachment to the igniter when brisant initiation is required, thus providing an efficient igniter/detonator, the efficiency of which is not impaired by the use of long firing lines, and which may be safely handled and transported because of the separable nature of the two parts.

REFERENCES:
patent: 3175492 (1965-03-01), Reyne et al.
patent: 3374127 (1968-03-01), Jenner et al.

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