Hi John, Quite right. I should have added ³in current production.² Ron Overs is the first to point out that Herrberger ³went there first² in regards to knuckle/jack being on the convergence line. Ron¹s action has several additional features. BTW, I like that felt on the jack tender, rather than on the letoff button. Prohibitively expensive to make, but a nice feature, IMO. Thanks for sharing the illustration. Regards, Fred Sturm University of New Mexico On 9/12/06 5:28 PM, "John Delacour" <JD at Pianomaker.co.uk> wrote: > At 3:57 pm -0600 12/9/06, Fred Sturm wrote: > >> The major friction in the action, though, is knuckle to jack/rep top, which >> is far from the convergence point except in Overs' design. > > Strictly not so. Here is Herrburger's action from 1898, which was imitated > with variations but no improvement by one or two other action makers. Note > that the two arcs are as near to touching as can be throughout the descent of > the hammer into check. > > JD > > > > > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20060913/5e502117/attachment.html -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/jpeg Size: 13843 bytes Desc: not available Url : https://www.moypiano.com/ptg/caut.php/attachments/20060913/5e502117/attachment.jpe
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