Fosters Strain Insulator

Foster's Strain Insulator.

The accompanying illustration shows the form of a new strain insulator recently patented by Samuel L. Foster of San Francisco, Cal. The insulator consists of an open link-like metallic body having a flat base, through which is a central perforation. In the opposite end is a countersunk hole for the cable connection. Passing through the central opening in the link is a bolt having at its lower end a countersunk opening for the other portion of the cable. A nut on the inner end of the bolt screws down into an opening in the top of an insulating body, as seen in the cut. The insulating body has a flat base which rests upon the flat portion of the link and is separated from it by a cushion washer.

Foster's Strain Insulator.