New Westinghouse Porcelain Strain Insulators

[Trade Journal]

Publication: Electric Railway Journal

New York, NY, United States
vol. 42, no. 25, p. 1298, col. 1


To meet the severe requirements due to the increasing weight of overhead construction two new types of porcelain strain insulators have been developed by the Westinghouse Electric & Manufacturing Company. These are a combination of a metal cap to give the necessary strength and a porcelain skirt to furnish the required dielectric strength. The metal parts of these insulators consist of a malleable-iron cap, a drop-forged steel eye bolt, and a malleable iron sleeve by which the eye bolt is securely fastened. The metal and porcelain parts are cemented together with a high-grade Portland cement. The cemented surfaces are provided with carefully determined corrugations which prevent fail