Sostenuto piano action / Mecanique de - Canadian Intellectual Property Office (CIPO) Patent CA 1064742

Patent Details

IPEXL > Directory > Canadian Intellectual Property Office (CIPO) > CA 1064742

Inventor
Hill Robert S
Herwig Lewis F

Assignee
Wurlitzer Company

IPC Codes
G10C 03/06

Patent Office: Canadian Intellectual Property Office (CIPO) Title: Sostenuto piano action / Mecanique de piano
Application No: 325030 Publication No: 1064742 Publication Date: 1979-10-23
Abstract SOSTENUTO PIANO ACTION Abstract of the Disclosure A sostenuto piano action is provided for upright pianos. Each damper is provided at the top rear thereof with a rubber fitting having a catcher flange or tab thereon. A pivoted sostenuto knife similar to that in a grand piano has a blade thereon which, upon pivoting of the sostenuto knife, will catch or engage the catcher tab or flange of each fitting to retain re- tracted such dampers as are in retracted position. With the knife pivoted to sostenuto position and additional notes played thereafter the flanges will bump the backside of the knife, but will not be caught. Spring biased elbows or hinges are provided in the damper levers to allow "breaking" of the levers at such time so as to avoid providing a strange feel to the pianist. The rubber nature of the fitting prevents any noise at such time.
CA1064742 at CIPO