Coupling assembly for shielded tubular jacketing

Claim 1

That improvement in metallic coupling means for mechanically coupling and electrically bonding a separably seamed tubular jacket detachably to a threaded metal bushing and which tubular jacket is of the type having a flexible main body including a metallic inner electrical shield layer the lateral edges of which overlap in the assembled condition of said jacket and an outer layer of non-conductive material secured to one another, said main body having interlocking seam-forming means extending generally parallel to one another along the opposite lateral edges thereof to hold said jacket assembled as a tube, said seamforming means being narrow and substantially thicker than said main body; metallic coupling means for clamping said jacket in registry with one end of a threaded metal bushing, said coupling means comprising a tubular metal insert telescoped into one end of said tubular jacket and in contact with the inner surface of the metallic layer thereof, said insert having a radially narrow flange at its outer end in closely spaced abutting relation to the adjacent end of said jacket, a thin-walled split sleeve encircling said jacket with the edges of its split closely spaced beside a respective lateral edge of the interlocked edges of said seam-forming means, said split sleeve having an outwardly projecting bead encircling the same intermediate the opposite ends of said sleeve, and threaded clamping nut means surrounding said split sleeve and engaging the threads of said metal bushing and including means effective as said bushing is tightened to engage the exterior surface of said bead to contract said sleeve thereby to clamp the adjacent end of said jacket immovably assembled to said tubular metal insert and to said threaded bushing.