Patent GB-524527-A (GB)
Title: High frequency coaxial conductor cables
IPC: D01G15/36
Filed: 1939-01-31
Abstract: 524,527. Electric cables. STANDARD TELEPHONES & CABLES, Ltd. Jan. 31, 1939. No. 3310. Convention date, March 24, 1938. [Class 36] Relates to high frequency coaxial conductor cables and comprises means for supporting the outer conductor concentrically upon the inner solid or tubular conductor. In Fig. 1, insulating spacing pins 19 have rounded ends 20 engaging the outer conductor 15, and pass through roundedged holes 17 in the inner conductor 16, their reduced ends 21 fitting in smaller holes 18 ; adjacent pins are relatively angularly displaced.' In another form, each pin has a smaller diameter part passing through the inner conductor, and a larger diameter part extending between the conductors. In Fig. 3, aligned pins 31, 32 have reduced inner ends with engaging V-formations 35, 38 ; the shoulders 41 may be curved to fit the inner conductors. In another form, a cylindrical pin passes through the inner conductor and insulating sleeves surround its ends to space the conductors ; alternatively, the pin may be held by a transverse rod of insulating material supported at its ends in the inner conductor and passing through the spacing pin, or engaging an annular groove therein. A further form shows pins threaded into holes in the inner conductor. In Fig. 11, tubular members 114 are drawn together by a double screw 17 and have beads 115 preferably shaped to fit the contour of the inner conductor 111 ; spacing pins 119 are supported on shoulders 120 and may be cemented in the members 114. or the outer ends of the latter may have opposite slots and grip the pins 119 frictionally. In another form, the slotted outer ends of the tubular members frictionally engage the inner conductor, and a single spacing pin passes through the tubular members and the screw 117, and is cemented to the latter. The outer ends of the tubular members may also be tapered. In a further form, the screw 117 is omitted, one tubular member having a threaded end for engaging an internally threaded part of the other tubular member. In Fig. 16, a tube 228, which may be of the same material as the inner conductor, has an internal bead 230 supporting spacing pins 231, 232 ; a single spacing pin may be used and have a central annular groove, the the bead 230 being replaced by an internal projection engaging the groove. In Fig. 21, cups 250, 251, have slots 261 giving a spring grip on the inner conductor, and cup 251 has a tapered. inner extension 258 engaged within the slotted inner end of cup 250. In Fig. 25, tubular supports 272 have flanges 273 and annular projections 275 between which the wall of the inner conductor 226 is received ; the supports have slots 277 and are surrounded by split rings 276 giving a frictional grip on the spacing pins 271. The split rings may be replaced by spaced inwardly projecting tongues, which may engage annular grooves in the spacing pins, and outwardly bent cut-away tongues may replace the annular projections 275. Also, instead of the flanges 273, the supports may be tapered and knurled or roughened on the outside. In Fig. 32, the inner and outer conductors are spirally corrugated, and carriages 202 ride on the inner conductor and support spacing pins 103.