| 摘要 |
A device for parting or cutting a tube by means of an explosive charge, comprising a pack of explosive annular pellets 20 and a fuse assembly. The fuse assembly comprises two mutually equal lengths of detonating fuse 10 and 11 of which one 10 extends axially through the said pack 20 and the other 11 is disposed at one end of the said pack 20. Fuse 10 extends between a first booster 17 adjacent to but not contiguous with said one end of the pack 20 and a second booster 18 at the other end of the pack 20, and fuse 11 extends between said first booster 17 and a third booster 19 at said one end of the pack 20. In this way the pack 20 is sandwiched between said second and third booster and simultaneous detonation of the pack 20 at its opposite ends is achieved, when required in use, by application of a single initiation system to the first booster 17.
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