On the old WNG upright actions that incorporated sostenuto, it works like this: Each damper has a wire that extends in the opposite direction of the wire that holds the damper head. This wire is about 2 1/2 inches in length and has a tab on the end. A rail parallel to the rod that actuates the dampers, and below that rod is attached to the action frame such that when the sostenuto pedal is depressed, this rail pivots out, away from the back of the action. On this sostenuto rail are "flanges" for each damper, and each flange has a spring loaded tab that, when the sostenuto rail is rotated outward will intercept the tab on the back of the damper. When a key is pressed, the tab on the back of the damper is rotated back away from the action. When the sostenuto pedal is pressed, the tabs on the sostenuto rail are moved in position under the tabs of any dampers on any depressed keys. Clear? Every part of this sostenuto mechanism except for the flanges on the sostenuto rail could be easily fabricated in a well equipped shop. The flanges are a different question. If you don't have them, and you can't find them, you would have to be one hell of a craftsman to make them. Frank Weston ---------- > From: Leslie W Bartlett <lesbart@juno.com> > To: MPT@talklist.com; pianotech@ptg.org > Subject: Everett upright > Date: Wednesday, February 17, 1999 1:03 PM > > There is a local tech who has a 1905 Everett upright with a sostenuto > mechanism. His question, since he refuses to enter the century and use a > computer...... > > How does one make it work. > > He gave me the following information. > The mechanism is attached to the back of the action. > There is no sostenuto "bar" as would be found in a grand. > There are 53 tabs, which it appears should be activated by spoons on the > damper levers. > > He's had a local rebuilder look at it, leaving him baffled. > > Any ideas? > > Thanks > les bartlett > Houston > ___________________________________________________________________ > You don't need to buy Internet access to use free Internet e-mail. > Get completely free e-mail from Juno at http://www.juno.com/getjuno.html > or call Juno at (800) 654-JUNO [654-5866]
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