New Westinghouse Porcelain Strain Insulators

[Trade Journal]

Publication: Electric Railway Journal

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


NEW PORCELAIN STRAIN INSULATORS


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