Patent attributes
A practical means to position and adjust the parts of a grand piano's action outside of the piano to fit and play properly, precisely, and as expected in the piano. A custom keybed supports the action as supported in the piano and secures its position. A regulating rack holds one or more reference edges above the action to delineate strike position (the location of hammer-to-string contact in the piano) and those distances from strike required for regulating. It also records hammer spacing at strike. A hammer squaring platform allows a shank traveler and hammer square to set up the hammers to address their strings vertically. And a string height gage assembly, including gage, sliding base, and rail, measures and records strike position in the piano to accurately set up the regulating rack's reference edges.
