Calin, Properly regulated, the Bluthner patent action functions like a double escapement Erard action. The key is the 90 degree abstract spring, which must be regulated to hold the hammer at the proper blow distance all by itself, with the hammers NOT resting on the rail. If you do this, the jack will slip back under the knuckle at about the same point as it would with an Erard action, ready for immediate repetition. One advantage of this design is its low inertia. In effect, it has the inertial characteristics of a Viennese action but with vastly superior repetition. The big disadvantage is the difficulty of keeping the abstract springs in proper regulation. I also think these actions got a bad reputation because they really perform badly when not properly regulated, and many technicians either regulate them improperly or refuse to touch them at all. Paul S. Larudee, RPT Richmond, CA Calin Tantareanu wrote: > Hello! > > I have seen a wonderful Bluthner piano for sale, form 1908 which has an > unusual (to me, at least) action. It doesn't seem to have the double > repetition. > Could anyone give me more info about this action? Is it any good? > I have posted pictures of it on my website: > http://calintantareanu.tripod.com/piano/bluthner.htm > > By the way, I have also posted further pictures of the Bechstien piano > restoration: > http://calintantareanu.tripod.com/piano/ > > Thanks! > > -- > > __________________________ > Calin > http://calintantareanu.tripod.com > __________________________
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