Canadian Patents Database

Patent Summary

(12) Patent:	(11) CA 1064742
(21) Application Number:	325030
(54) English Title:	SOSTENUTO PIANO ACTION
(54) French Title:	MECANIQUE DE PIANO

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English Abstract

Note: The Abstract is shown in the official language in which it was submitted.

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.

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Patent Details

(52) Canadian Patent Classification (CPC):	84/19
(51) International Patent Classification (IPC):	G10C 3/06 (2006.01)
(72) Inventors (Country):	HILL, ROBERT S. (Country Unknown) HERWIG, LEWIS F. (Country Unknown)
(73) Owners (Country):	WURLITZER COMPANY (THE) (Not Available)
(71) Applicants (Country):
(74) Agent:
(45) Issued:	1979-10-23
(22) Filed Date:
(30) Availability of licence:	N/A
(30) Language of filing:	English

Patent Cooperation Treaty (PCT):	No

(30) Application Priority Data:	None

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View Patent Image	Download Patent Image in PDF Format	Size of Image (KB)	Number of Pages
Cover Page	Cover Page	23	1
Abstract	Abstract	29	1
Claims	Claims	46	1
Description	Description	342	8
Drawings	Drawings	113	2
Representative Drawing	Representative Drawing	N/A	N/A