REHEARSAL MECHANISM FOR PIANO Russian patent published in 2010 - IPC G10C3/16 

FIELD: mechanics.

SUBSTANCE: device comprises keys, which are installed on frame of keyboard with the possibility of swinging, and every of which retains controlled driving element inclined in counterclockwise direction. Driving element is connected to inclined swinging lever, acting as lever of the first output accessory, fixed with the possibility of rotation on the main swinging bridge unit, which in process of operation swings with specified lever of the first output accessory connected to end roll of hammer fixed with the possibility of rotation on the first support element. Specified main swinging bridge unit is inclined downwards in counterclockwise direction relative to horizontal line. On the first support element there are adjustment buttons arranged for adjustment of the first and second output accessories. The second support element is connected to main swinging bridge unit, and lever of the second output accessory is fixed to the second support element with the possibility of rotation, and button is arranged on lever for adjustment of its working angle, and lever of the second output accessory interacts with specified lever of the first output accessory, where adjustment button is also arranged. Besides specified driving element has substantially cylindrical shape and comprises helical adjustment facility and sharpened end part arranged with the possibility of interaction with concave seat arranged in lower end part of specified swinging lever. Besides on the main swinging bridge unit there is the first tip of hammer installed, which is not affected by the lever of the second output accessory, which, in its turn, has slightly S-shaped configuration and interacts with the second tip of hammer fixed to tail part of specified hammer.

EFFECT: invention achieves effect of magic touch in process of double rehearsal in piano with improved reliability of device design and its simplification.

11 cl, 3 dwg