Patent ID: 7687693

Claim:
A repetition assembly for a grand piano comprising: a repetition base; a heel; a jack; a balancier; and a set of two regulating buttons, wherein: said repetition base is assembled to said balancer by a pin; said jack is assembled to said repetition base by a pin; one of said set of two regulating buttons is assembled to said jack by a rigid threaded member; the other of said set is assembled to said balancier by a rigid threaded member; said heel is attached to a lower base member of said repetition base by a calibrated adjustable connection system, comprising: at least one male notch ( 102 ) on the upper surface of said heel and a set of female notches ( 79 ) on the lower surface of said lower base member of said repetition base wherein said notches are appropriately sized so that said at least one male notch fits snuggly inside of any one of said set of female notches and the clearances between the adjacent connection surfaces of said notches is appropriate for connecting these members; and said repetition assembly is a mechanical action comprising three pivot points: a center-of-rotation of said repetition base, a center-of-rotation of said jack, and a center-of-rotation of said balancier, so that an upward force applied to the bottom surface of said heel causes said repetition assembly members to pivot about said pivot points, yielding a general upward motion of said jack.