| 摘要 |
975,306. Strain insulators. ANDERSON ELECTRIC CORPORATION. July 25, 1963 [Aug. 23, 1962], No. 29485/63. Heading H2C. A strain insulator comprises a resin impregnated glass fibre rod the ends of which are housed in aluminium blocks 9. Fig. 3 shows the details of the end mounting. The end of the rod is slotted longitudinally as shown at 27, a wedge W is inserted into the mouth of the slot and the assembly is pushed hard up against the bottom of a recess 17 in the block. The recess has a cylindrical part D1 followed by a conical part D2 and the wedge angle is slightly greater than that of the cone. The slot 27 extends beyond the bottom of the wedge so that there is no tendency for the wedge to split the rod. The slot, wedge faces, end of the rod and sides of the recess may be coated with an epoxy resin in which after curing forms a weather seal and will not harden. The projecting collars 29 protect the insulator from flashover in the region of the fibre glass rod. |
