Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 433
PORCELAIN INSULATORWITH IRON PIN , BUILT UP. … 60,000 VOLT INSULATORAND PIN. GLASS INSULATOR FOR55.000 VOLTS. three insulators just described, which are mounted on wooden ])ins,this Santa Ana insulator has a pin with an iron core, wooden thread 397 16 INSULATORS and porcelain base. This base extends up from the cross-arm a dis-tance of 3^…
Electrical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
