Supplemental seal for the chordal hinge seals in a gas turbine

A turbine comprising:

• a turbine nozzle support ring having a generally axially facing first surface;
• a turbine nozzle segment having at least one stator vane and including an inner band carrying an inner rail, said inner rail having a second surface in axial opposition to said first surface;
• one of said first and second surfaces including an axially extending projection therealong for engagement with another of said first and second surfaces to form a first seal therebetween;
• and
• a supplemental seal extending between said inner rail and said support ring at a location radially inwardly of said first seal and between at least opposite end edges of said segment, said supplemental seal including a seat projecting axially from said support ring and a flexible leaf seal having a first margin thereof secured to said inner rail and a second margin radially inwardly of said first margin sealingly engageable against said seat upon flexing of said leaf seal.