Transformer core construction and method of producing same

Claim 1

A NESTED TRANSFORMER CORE CONSTRUCTION HAVING A PAIR OF YOKES AND A PAIR OF LEGS COMPRISING IN COMBINATION, A PLURALITY OF INTERNESTED RECTANGULAR CORE SECTIONS EACH OF WHICH IS FORMED FROM A PLURALITY OF INTERNESTED SINGLE TURN LAMINATIONS WHICH LATTER EACH HAVE THEIR OPPOSITE ENDS IN ALIGNED COPLANAR RELATION TO PROVIDE THEREIN A JOINT WHEN THE CORE SECTION IS IN CLOSED RECTANGULAR FORM, THE JOINTS OF THE LAMINATIONS OF EACH SECTION BEING SUCCESSIVELY OFFSET FROM ONE ANOTHER SO THAT THEY ARE DISTRIBUTED LENGTHWISE OF ONE OF THE LEGS OF THE RECTANGULAR SECTION AND CONJOINTLY DEFINE A SECTION JOINT OF LONGER LENGTH THAN THE THICKNESS OF THE CORE SECTION LEG IN WHICH THE JOINT IS DISPOSED, SAID PLURALITY OF CORE SECTIONS BEING SO INTERNESTED THAT THE SECTION JOINT OF THE INNERMOST SECTION IS COMPOSED IN ONE OF THE LEGS OF THE COMPOSITE CORE WHILE THE SECTION JOINTS OF THE REMAINING SECTIONS ARE DISPOSED IN SUCCESSIVELY OFFSET PARTIALLY OVERLYING RELATION IN THE OTHER LEG OF THE COMPOSITE CORE AND DEFINE A COMPOSITE JOINT IN THAT LATTER LEG WHICH IS OF LONGER LENGTH THAT THE THICKNESS OF THE COMPOSITE CORE LEG IN WHICH