Patent ID: 7484646

Claim:
An index bracket assembly for positioning an external apparatus on a facemask having coplanar top rim portion and side rim portions extending to lower corners comprising: a U-shaped frame connected to said external apparatus and having a top opening, side openings and a coplanar flat U-shaped bearing surface, said coplanar flat U-shaped bearing surface being in a coplanar extension along said coplanar top rim portion and side rim portions of said facemask and having one of a pair of orthogonally extending feet at opposite ends thereof, said feet abutting against said lower corners of said facemask; a three-point harness having a top strap connected to said top opening and side straps each connected to a separate one of said side openings, said top strap and said side straps being flexible and inelastic and each having an adjustable buckle component for tightening said top and side straps and pulling said coplanar flat U-shaped bearing surface against said coplanar top rim and side rim portions of said facemask, said coplanar flat U-shaped bearing surface of said U-shaped frame contiguously and continuously fitting against said coplanar top rim and side rim portions of said facemask; and a layer of compliant material on said coplanar flat U-shaped surface for elastically yielding to compliantly conform to said coplanar top rim portion and side rim portions of said facemask.