Improvements in Pneumatic Actions for Automatic Pianos, Piano Players, or the like.

摘要

4804. Katz, C., and Kastner, M. M. Feb. 26. Player-pianos; actions.-In a pneumatic action for automatic pianos, organs, piano-players, or the like, the pneumatics are of the type in which floating movable boards 3 are employed, so that as the pneumatic expands the board 3 remains parallel to the board 2. Each pneumatic is connected to a lifter 4 which is guided by radius rods 5 or by fixed guides, and the valve-board is provided with projecting shelves 2a on which the pneumatics are mounted. The piano action is operated by an adjustable striker 15.