Musical instruments, pianos, piano actions and their components, upright pianos; grand pianos; upright piano keys; grand piano keys; upright piano actions; grand piano actions; components of upright piano actions, namely action rails, damper rods, whippens or levers, jacks, let-off rails, levers for the let-off rails, let-off buttons, jack stop rails, hammer butts, hammer butt flanges, hammer shanks, hammers or hammer heads, damper levers, damper heads, damper felts, hammer rails, damper stop...

PIANO ACTION-NAMELY, THE MECHANISM BETWEEN THE KEYBOARD AND THE STRINGS WHEREBY DEPRESSION OF THE KEYS EFFECTS VIBRATION OF THE STRINGS