Improvements in and relating to Grand Pianoforte Actions.

摘要

29,034. Streich, R. Dec. 14. Player-pianos.-In an action for manually or automatically operated grand pianos, the wippcn is connected by an arm 26 to a lever 25, which carries the hammer check 28 and is provided with an extension 29 for operating the damper 31. The lever 25 is adapted to be operated by the striker 27 of the automatic action. A spring 32, the tension of which can be adjusted by a screw 33, supports the weight of the action.