Abstract: An electrical insulator having opposed jaws with at least one of the jaws being adjustable in relation to the other jaw for clamping an electrical conductor therebetween. The jaws are part of plastic pieces which are molded at elevated temperatures and which undergo thermal contraction when cooled subsequent to the molding process. Opposed grooves are provided in the confronting surfaces of the jaws. Liner members consisting of a material different from that of the jaws are received in the grooves. The liner members are sized for ready insertion into the grooves while the interior groove dimensions are expanded as a result of the elevated molding temperatures. The subsequent thermal contraction of the internal groove dimensions during cooling results in the liner members being firmly anchored within the grooves.

Abstract: This disclosure is directed to an insulator for clamping and holding an electrical conductor above the ground for aerial power distribution and transmission. The insulator includes a body member, first jaw means integral with one end of the body member, slide means, second and third jaw means integral with the slide means and means for mounting the slide means in the end of the body member for longitudinal movement substantially normal to the first jaw means. It also includes bolt means for causing movement of the third jaw means towards a concave neck portion of the body member for gripping a conductor between the third jaw means and the body member.This disclosure is also directed to a method of stringing an electrical conductor on a plurality of insulators which are supported above the ground on a series of poles.

Abstract: This disclosure is directed to a device for stringing an electrical conductor on an insulator above the ground for aerial power distribution or transmission. The stringing device includes first and second semi-tubular members each of which has an outwarddly extending flange at one end and means for detachably securing the semi-tubular members together to form a circular passage between them. One embodiment also includes first ear means projecting outwardly from one side of the flange means of the first semi-tubular member, second ear means projecting outwardly from one side of the outwardly extending flange of the second semi-tubular member, the ear means includes transverse orifices which register with each other when the semi-tubular members are detachably secured together and means passing through the registering orifices for preventing complete separation of the semi-tubular members when the means for detachably securing them together is released.