초록 ▼

An initiation signal transmission line tube (10a, 10b, 10', etc.), which is effective to transmit an initiation signal therethrough, contains one or more rupture lines (20a, 20b and 20c, etc.) in the tube wall. Rupture lines (20a, 20b and 20c, etc.), which may be weld seams or grooves or both, are r

An initiation signal transmission line tube (10a, 10b, 10', etc.), which is effective to transmit an initiation signal therethrough, contains one or more rupture lines (20a, 20b and 20c, etc.) in the tube wall. Rupture lines (20a, 20b and 20c, etc.), which may be weld seams or grooves or both, are ruptured by the initiation signal passing therethrough. The spent tube carcass is split or fragmented and therefore less troublesome as litter on a work site than an intact shock tube carcass. If the tube is extruded, a rupture line may be formed by contacting the parison (118) from which the tube is made with scoring means, e.g., a pin or blade (124a, 124b). Optionally, the scoring means may be moved radially during the extrusion process, to form serpentine, e.g., helical, rupture lines. Preferably, the rupture lines intersect periodically and, upon firing, the tube is fragmented into shards. Alternatively, the tube (50d) may be extruded in segments (62) that adhere to each other at interfaces (64) which provide rupture lines for the tube. Optionally, some segments (62) may be formed from different extrudate materials than others.

대표청구항 ▼

[ What is claimed is:] [19.] A fissile signal transmission tube comprising:a tube comprising a tube wall having an inner surface and at least one longitudinally extending rupture line formed in the tube wall along the entire length of the tube to provide a region of reduced bursting strength; anda r

[ What is claimed is:] [19.] A fissile signal transmission tube comprising:a tube comprising a tube wall having an inner surface and at least one longitudinally extending rupture line formed in the tube wall along the entire length of the tube to provide a region of reduced bursting strength; anda reactive material disposed on the inner surface of the tube in an amount sufficient to propagate an initiation signal therethrough and to burst the tube along the at least one rupture line.