| 摘要 |
1,237,174. Cable joints. STANDARD TELEPHONES & CABLES Ltd. 2 April, 1969, No. 17320/69. Heading H2E. In a method of jointing a submarine coaxial cable to a repeater tail cable, the aluminium outer conductor 2, of the submarine cable is welded near the cable end to an aluminium braid sheath 9, the sheath 9 being joined to the copper braid outer conductor 14 of the repeater tail cable by means of a fitting, comprising a grooved and castellated copper alloy sleeve 6 welded to an aluminium alloy endpiece 7 to which is welded the other end of the braid sheath 9, the outer conductor 14 being joined to the castellated sleeve 6. In the preferred method, a tube 18 is slipped on to the free end of the cable and sections of outer sheath 1, outer conductor 2, inner insulation 3, and inner conductor 4 are removed, the portion of outer sheath 1 being retained. The insulation 3 is shaped at the free end. The fitting is formed by welding an Al/Mg endpiece 7 to a castellated Cu/Ni/Si, sleeve 6 having a Be/Cu, lining 8. The Al/Mg braid sheath 9 is then welded to the endpiece 7. This assembly is then placed over the cable together with a packing piece 11 and the braid sheath 9 is welded to the outer conductor 2. The retained portion of the outer sheath 1 is shortened and replaced over the braid sheath as la, the tube 18 is pushed into position and sealed to outer sheath 1 by a moulded joint 19. The inner conductor 12 of the repeater tail cable is joined to the inner conductor 4 of the submarine cable by means of ferrule 13. Dielectric is moulded around the ferrule 13 and sleeve 6 filling spaces 15, 17, and a double braid copper covering 20 placed over the dielectric and welded to the outer conductor 14 and castellated sleeve 6. A securing plastics tape is tightly wrapped around the joint from the tube 18 to the outer sheath of the repeater tail cable (not shown). The joint may be armoured in a known manner. |
