Glass fiber reinforced synthetic resin tube having integral metal attachment

An electrically insulative unit comprising:

• an elongated, cured synthetic resin tube having a sidewall of predetermined thickness;
• and
• a metal attachment integrally joined to and at least partially embedded in the sidewall of the tube with one face of the attachment exposed, said attachment forming an integral part of the sidewall of the tube by having been embedded in the tube sidewall and retained in fixed disposition relative to the tube sidewall during fabrication thereof prior to and during final curing of said resin,
• said attachment and the sidewall of said tube having mutually complementary, interengaging concave and convex surfaces respectively, with a portion of the sidewall overlapping and complementally engaging respective edges of the attachment.

An electrically insulative unit comprising:

• an elongated, cured synthetic resin tube having a sidewall of predetermined thickness;
• and
• a metal attachment integrally joined to and at least partially embedded in the sidewall of the tube with one face of the attachment exposed, said attachment forming an integral part of the sidewall of the tube by having been embedded in the tube sidewall and retained in fixed disposition relative to the tube sidewall during fabrication thereof prior to and during final curing of said resin,
• there being elongated strips of synthetic resin impregnated fiberglass positioned adjacent to at least certain of the edges of said attachment, said strips being disposed longitudinally of said tube on each side of said attachment, said strips being disposed in bridging engagement between the attachment and the sidewall of said tube for presenting a continuous, smooth transitional section between said sidewall and said attachment.