The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1977
Filed:
Nov. 10, 1975
Robert S Hill, Holly Springs, MS (US);
Lewis F Herwig, Holly Springs, MS (US);
The Wurlitzer Company, Chicago, IL (US);
Abstract
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 retracted 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.