Action for upright piano

Details Action for upright piano Action for upright piano

G - Physics

10

C

84/24

G10C 3/16 (2006.01)

Patent

CA 1224950

ABSTRACT An action for an upright piano which emulates or simulates the action of a grand piano is provided. In the action, a back check lever is positioned above the back of the key, and a grand piano whippen is positioned above the back check lever. The grand whippen acts on a knuckle provided on a catcher arm integrally connected with the hammer shank at a substantial angle. Depression of the key produces upward movement of the back of the key, the back check lever, and the grand whippen, in turn producing rotation of the catcher arm which drives the hammer towards the string. The catcher arm has a catcher at its forward end and the back check lever has a hack check for catching the catcher after the hammer has rebounded from the string. A damping action is mounted independently from the hammer action.

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