| 摘要 |
695,926. Loaded Cables. LIGNES TELEGRAPHIQUES ET TELEPHONIQUES. Sept. 28, 1951 [Jan. 31, 1951], No. 22751/51. Class 36. The inductive loading of a cable consists of magnetic shells comprised of a large number of individually - insulated ferromagnetic wires, each having a diameter of not more than 0.04 mm., which are agglomerated by impregnating with insulating material and which lie at an angle of between 50 degrees and 90 degrees with the longitudinal axis of the shell. The shells are made by winding a bundle of the individually insulated wires around a mandrel, and then cutting the bundle longitudinally in two or more planes after impregnating. The shells are arranged so as partly to surround the periphery of and lie parallel with at least the conductor of the cable. A loaded symmetrical cable (Fig. 6) may comprise two conductors 12 covered with dielectric 15. Two spaced apart shells 13 of semi-circular cross-section are placed around each conductor. Further insulation 15 and a metal screen 14 are then applied. A coaxial cable (Fig. 7) may comprise a central conductor 16 surrounded by insulation 15 and two spaced-apart semi-circular magnetic shells 17, the wires of one shell lying in a right-handed helical curve, and those of the other shell in a left-handed helical curve. Further insulation 15 and an outer conductor 18 are applied. Conductors 21 (Fig. 9) in the form of thin tapes may be loaded by means of magnetic shells 22 of V-shaped cross-section, arranged so that the bottom of the V is close to the edges of the tapes. Specification 669,322, [Group XXXV], is referred to. |
