Come to think of it, we should not interfere with a hammer swing nor with the spring/weight of the whippen. Actually, Richard Brekne has mentioned this a long time ago to me and I am convinced he is right. There should be no helper springs at all, I think, unless all the natural ways to overcome excess weight have been exhausted. I am not against assist springs but they are tricky. Every extra lift takes away the directness of feel and touch and also influences the tonal outcome. Antares, The Netherlands see my website at : www.concertpianoservice.nl On zaterdag, jun 7, 2003, at 10:59 Europe/Amsterdam, Isaac OLEG wrote: > > > Another reason that I think of , I wander, (it is relative also to > the old thread on keyboard bedding and tensioning the balance rail) , > is that we try to keep the energy at the maximum in the hammer head, > so it is supposed to be slightly uncoupled from the rest of the action > when playing. > > This is a possible explanation of the added power when the balance > rail is tensioned, at the same time, that is also why cutting an arch > shape under the screw hole in the hammer flange add some strength and > a faster tone on any hammer. > > I'll send pics if you wish , the experiment is easy to do. > > Then having a spring holding the hammer is probably in the way of that > freeness is not it ? > > Hope my comments are clear !!! > > Best to all. > > > > Isaac OLEG > > Entretien et reparation de pianos. > > PianoTech > 17 rue de Choisy > 94400 VITRY sur SEINE > FRANCE > tel : 033 01 47 18 06 98 > fax : 033 01 47 18 06 90 > cell: 06 60 42 58 77 > >> -----Message d'origine----- >> De : pianotech-bounces@ptg.org >> [mailto:pianotech-bounces@ptg.org]De la >> part de Bill Ballard >> Envoye : samedi 7 juin 2003 04:58 >> A : Pianotech >> Objet : Re: Hammer assist spring ? >> >> >> At 11:57 PM +0200 6/6/03, Richard Brekne wrote: >>> I just know there has got to be a few great reasons why this is >>> ridiculous :) But humour me ok ? >> >> OK you asked for it. Hows'bout a leaf spring attached to the top of >> the rep lever post bearing on the underside of the shank just on >> front of the hammer head. That way while the rep is being lifted by >> the capstan (and the jack is lifting the knuckle), the rep >> lever can >> lift the spring to offset the weakening of the spring by the >> jack-induce motion of the shank. >> >> I imagine the spring and the shank would have to stay in contact at >> all times, to avoid the click of engagement. And it should be screw >> adjustable. (I've got bad memories of trying to manually adjust >> helper springs to the nearest 1g of BW.) >> >> Mr. Bill >> >> "If we see you SMOKING we will assume that you are on fire and will >> take appropriate measures" >> ...........Sign in a Music Dept. Hallway >> +++++++++++++++++++++ >> _______________________________________________ >> pianotech list info: https://www.moypiano.com/resources/#archives >> > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives > >
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