Casing for a junction in a flat cable

H - Electricity – 02 – G

Patent

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H02G 15/10 (2006.01) F42D 1/045 (2006.01)

Patent

CA 2191808

A casing 14 for a junction included in a flat cable 10, e.g for a trigger stage of a sequential blasting system, consists of two casing portions 12, 13 adapted to be fixed to each other by screwing within the lead-through regions of the cable. The casing portions 12, 13 constitute cramping areas for fixing the cable 10 to the casing 14 in a direct, non- positive way, wherein the screws 23 which interconnect the two casing portions 12, 13 at the same time create the cramp- ing pressure. An additional positive engagement between the cable 10 and the casing 14 is achieved by engagement between a tube 25 which receives the screw 23 and a hole 29 provided in a centre web 28 of the cable. Tensile strain occurring within the cable 10 is thus diverted via the casing 14 around the electrical equipment provided in the casing and soldered to the wires 19 of the cable 10. Even under high tensile forces, the soldering points are thus not exposed to any strain.

n boîtier 14 pour une connexion dans un câble plat 10, p. ex. pour un étage de déclenchement d'un système de tir séquentiel, comprend deux parties 12, 13 de boîtier adaptées pour être fixées l'une à l'autre par vissage dans les zones de traversée du câble. Les parties 12, 13 de boîtier contituent des zones de serrage pour fixer le câble 10 au boîtier 14 de façon directe non positive, et les vis 23 qui raccordent les deux parties 12, 13 du boîtier créent en même temps la pression de serrage. Un engagement positif additionnel entre le câble 10 et le boîtier 14 est réalisé par engagement entre un tube 25 qui recoît la vis 23 et un trou 29 pratiqué dans une âme centrale 28 du câble. Les efforts de traction se manifestant dans le câble 10 sont ainsi déviés par le boîtier 14 autour de l'équipement électrique qui s'y trouve et qui est soudé aux conducteurs 19 du câble 10. Même en présence d'importants efforts de traction, les points de soudure ne sont ainsi soumis à aucune tension.

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