Dive mask index bracket

A method of securely positioning an external apparatus on a facemask having coplanar top rim portion and side rim portions extending to lower corners comprising the steps of:

• connecting a U-shaped frame of an index bracket assembly to said external apparatus, said U-shaped frame having a top opening, side openings and a coplanar flat U-shaped bearing surface having one of a pair of orthogonally extending feet at opposite ends thereof;
• placing a layer of compliant material on said coplanar flat U-shaped bearing surface;
• placing said coplanar flat U-shaped bearing surface contiguously and continuously on said coplanar top rim portion and said side rim portions of said facemask, said coplanar flat U-shaped bearing surface extending along said coplanar top rim portion and side rim portions of said facemask;
• abutting said lower corners of said facemask against said feet;
• tightening top and side straps of a three point harness connected to said top opening and said side openings, said top strap and said side straps each having an adjustable buckle component for assuring tightening of said top and side straps;
• and
• using said top and side straps to pull said coplanar flat U-shaped bearing surface and said compliant layer against said coplanar top rim and side rim portions of said facemask and thereby prevent shifting of said apparatus on said facemask.

An assembly for mounting an apparatus externally on a facemask having coplanar top rim and side rim portions extending to lower corners comprising:

• a U-shaped frame connected to said apparatus, said U-shaped frame having a top opening, side openings, and a coplanar flat U-shaped bearing surface contiguously and continuously extending along said coplanar top rim and side rim portions of said facemask;
• means for abutting one of a pair of feet against said lower corners of said facemask, each of said feet orthogonally extending from opposite ends of said coplanar flat U-shaped bearing surface;
• harness means connected to said U-shaped frame, said harness means having flexible and inelastic straps connected to said top opening and said side openings;
• adjustable buckle means for securing said straps pulling said coplanar flat U-shaped bearing surface contiguously and continuously against said coplanar top rim and side rim portions of said facemask;
• and
• elastically yielding means disposed on said coplanar flat U-shaped bearing surface for elastically yielding to said coplanar top rim portion and said side rim portions of said facemask.