Nail knob's, Spools, Cleat's

By Mason Colby; posted February 21, 2016

View Original (3648 x 2736) 3515KB


What exactly were the applications for these types of insulators and where were they used? Leaning toward the sides of houses as a best guess on my behalf., but, were they ever used in rural open wire applications with no buildings involved, or other locations? In other words did they ever take the place of pin-types?