H. W. Johns Mfg. Introduces new strain insulator

[Trade Journal]

Publication: Western Electrician

Chicago, IL, United States
vol. 13, no. 20, p. 256, col. 1

Giant Strain Insulator.


The accompanying cuts illustrate the new "Giant" strain insulator manufactured by the H. W. Johns Manufacturing company of New York. This device is simple in construction and very powerful, having an average breaking strain of 6,500. pounds. It is insulated with sheet mica internally and is completely covered exteriorly with


Giant Strain Insulator.


moulded mica. The design is such that no parts can become displaced under the severest strain, and all parts are thoroughly protected so that the sheet mica and the insulator itself cannot absorb moisture. This insulator attracted much attention at the Milwaukee convention.


Keywords:H. W. Johns Manufacturing Company : Strain Insulator
Researcher notes: 
Supplemental information: 
Researcher:Bob Stahr
Date completed:January 6, 2009 by: Bob Stahr;