Patent attributes
An index bracket assembly positions an external apparatus on a facemask having top and side portions extending to lower corners. A U-shaped frame connected to the external apparatus has top and side openings and a U-shaped bearing surface having orthogonally extending feet at its opposite ends. The U-shaped bearing surface extends along the top and side portions and the feet abut against the lower corners of the facemask. A three-point harness has a top strap connected to the top opening and side straps are connected to the side openings. The top strap and side straps each have a separate adjustable buckle component connected together for tightening them and pulling the U-shaped bearing surface against the top and side portions of the facemask. A layer of compliant material on the U-shaped surface elastically yields to the top and side portions of the facemask to prevent slippage.
