| 摘要 |
1,269,713. Insulating cables. GENERAL CABLE CORP. 6 May, 1969 [13 May, 1968], No. 23038/69. Heading H1A. An electrical cable including a core 12 having a plurality of conductors 13 comprises an inner strip 14 e.g. of aluminium longitudinally wrapped around the core, an outer strip 24 e.g. of steel similarly wrapped with the edges 26, 28 overlapped and metallically bonded at 30, and an outer plastics jacket 38, the inner strip having an insulating adhesive coating 20 of a polyolefin on each surface. When heat is applied at 30 for soldering the edges of the outer strip, the coating 20 fuses to form bonds between (a) the edges 16, 18 of the inner strip and (b) portions of the outer surface of the inner strip and inner surface of the outer strip as at 34. The heat applied is also sufficient to displace the coating at portions along the length of the cable to form metallic contact between the strips for electrical continuity. The inner strip may (as shown) have a lap seam in the vicinity of the overlap of the edges of the outer strip or not (Fig. 2, not shown) in which case the core is-protected by an inner plastics jacket 44. The inner and outer strips may be corrugated. |
