Delay fuse with a slow rate of combustion and a small diameter
AssigneeSociete Nationale des Poudres et Explosifs
InventorsPaul P. Cord, Louis R. Guy
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Abstract
The invention relates to a delay fuse having a rate of combustion which is less than or equal to 4 mm/second, characterized in that it has a diameter which is less than or equal to 3 mm and in that it contains a pyrotechnic composition consisting of 25 to 45% by weight of tungsten having a particle size of between 2 and 4 microns, from 45 to 65% by weight of barium chromate and from 8 to 15% by weight of potassium perchlorate. The delay fuse according to the invention, which is provided with a metal sheath, is applied, in particular, in the pyrotechnic systems carried on board space missiles or submarines.
Claims6
Delay fuse having a rate of combustion which is less than or equal to 4 mm/second, which has an external diameter less than or equal to 3 mm, in which the ratio of the external diameter to the core occupied by the pyrotechnic composition is between 1.4 and 2.0, which contains a pyrotechnic composition consisting of 25 to 45% by weight of tungsten having a particle size of between 2 and 6 microns, from 45 to 65% by weight of barium chromate, and from 8 to 15% by weight of potassium perchlorate and which is free of silica.
Dependencies are inferred from the claim text.