The Talking Machine Patent Archive

Patents you could hear

Dual-mode instrument

Patent drawing showing a piano's internal mechanism including key-levers, hammers, dampers, a large pin-barrel cylinder N with crank y, wind-chest H, small piston cylinders K, and connecting rods and levers labeled B through R, with inset figures 2 and 3 detailing the cylinder and piston arrangement.MECHANICAL MUSICAL INSTRUMENTCesare Donadoni · January 6, 1885