Concrete pipe construction

Claim 1

A REINFORCED CONCRETE PIPE CONSTRUCTION COMPRISING PIPE SECTIONS EACH HAVING A CORE PORTION COMPRISING A LONGITUDINALLY EXTENDING METAL CYLINDER, A METAL BELL RING ATTACHED TO SAID METAL CYLINDER AT THE BELL END OF SAID PIPE SECTION, A METAL SPIGOT RING ATTACHED TO SAID METAL CYLINDER AT THE SPIGOT END OF SAID PIPE SECTION, AND AN INNER AND AN OUTER CONCRETE LINING OF SUBSTANTIAL THICKNESS COVERING SAID CYLINDER AND A SUBSTANTIAL PORTION OF BOTH SAID BELL RING AND SAID SPIGOT RING, A CYLINDRICAL METAL BAND CLOSELY SURROUNDING SAID OUTER CONCRETE LINING OF SAID CORE AT A POSITION TO OVERLIE AT LEAST A PORTION OF SAID BELL RING, A SECOND CYLINDRICAL METAL BAND CLOSELY SURROUNDING SAID OUTER CONCRETE LINING AT A POSITION TO OVELIE AT LEAST A PORTION OF SAID SPIGOT RING, A METAL WIRE SPIRALLY WOUND UNDER TENSION AROUND SAID OUTER LINING AND AROUND EACH SAID BAND FROM ONE SAID BAND TO THE OTHER OF SAID BAND WITH RESPECTIVE ENDS OF SAID WIRE ANCHORED ON THE CORRESPONDING SAID BAND, AND AN OUTER CONCRETE WALL COMPLETELY COVERING SAID WIRE AND SAID BANDS WHEREBY SAID WIRE AND SAID BANDS ARE ENTIRELY OUT OF CONTACT WITH THE METAL PORTIONS OF SAID CORE, AND WITH THE CORRESPONDING PORTIONS OF ADJOINING SECTIONS.