Title: Method for improving repeated beating characteristic, knock-out pin and action mechanism of piano
Application Number: 200410055988 Application Date: 2004.08.03
Publication Number: 1581288 Publication Date: 2005.02.16
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G10C3/16
Applicant(s) Name: Kawai Musical Instr Mfg Co. Address:
Inventor(s) Name:
Attorney & Agent: li ruihai wang jinggang
Abstract:
     A jack used in an action mechanism of a piano has substantially an L-shape, composed of a big jack portion and a small jack portion. The thickness of the small jack portion is made smaller than that of the big jack portion in a direction of key arrangement in a state of the jack being fitted in the piano. By reducing the weight of the small jack portion as above, the time required for the jack to return to a position capable of pushing up a part of a striking member can be shortened. Accordingly, more frequent repetitive striking is allowed within a predetermined period.
Time: 9
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