Abstract: An insulator of the type composed of a core onto which a skirt made of insulating material and provided with fins is molded. The core comprises an axial rod of a composite material onto whose ends the end sleeves of mounting terminals are swaged.The rod comprises a web of longitudinal, parallel fibers bonded by thermosetting resin and encased in a braided or woven envelope like covering. A mounting terminal is connected to an end of the rod by a combination of uniformly distributed radial locking of the sleeve onto the rod and by penetration of the metal of the sleeve into gaps between the fibers of the envelope like covering.

Abstract: A multistrand cable, especially one with several steel strands forming a central core and with a surrounding sheath consisting of a larger number of outer strands of aluminum or the like, is embraced by a deformable sleeve with a bore of generally polygonal cross-section radially constricted therearound to serve as an anchor or a connector. The sides of the polygon, defining flat or curved faces in contact with the sheath, are separated by longitudinal incisions whereby these faces approach one another under the constrictive stresses in order to exert a firm grip on the inner strands through the intermediary of the outer strands.