Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 345
Fig. 190, is sometimes placed in the span wire.This is an insulator adapted to withstand the great tension putupon it by the span wire. Means are usually provided for tighteningthe span wires as they stretch and as the poles give under the strain.The insulator may have a screw eye or a turnbuckle… … Fig. 189. Details of Section Insulator Used at Intervals in Trolley Line pole is greater than that of the iron pole, which is advantageous.Fig. 191 shows a simple span-wire construction for an interurbanroad. In this there are no strain insulators shown; if used theywould be inserted in the span…
Electrical engineering
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