Fuse and detonator with pressure resistant watertight joint - made by lubricated sleeve between fuse and capsule

摘要

The parent patent describes a detonator with fuse for military purposes, esp. for detonation in great depths of water or high-pressure environments. The connection between the fuse and the capsule of the detonator is made by introducing a sleeve between these two; the sleeve has markings to enable the correct depth of insertion of the fuse to be achieved. In the patent of addition, this sleeve is lubricated with a hydrophobic lubricant to assist its insertion into the capsule. The lubricant may be applied to the inner and outer faces of the sleeve. Pref. lubricants are: a silicon wax; a mixt. of silicone oil and liquid paraffin, esp. comprising 50-75% of silicone oil. This arrangement enables slight divergences in the gap between the thin sleeve and the fuse and/or capsule to be made up in a satisfactory, watertight manner.