<html> <font size=3>At 10:37 PM 01/21/2000 -0500, you wrote:<br> <br> >>John, I don't remember Duofulcrum keys ... can you tell me what brand<br> >>that was? And how did the keys have two fulcrums?<br> ><br> >As you know, most balance rails are flat across the top with the punchings providing the pivot.. Heintzman figured that introducing two "peaks", or continuous quarter-rounds, one for the white and one for the black keys, would accelerate key movement.... thus, duofulcrom. Get it?<br> of Theodore Heintzman.<br> > John Lillico, RPT,<br> >Oakville, Ontario, Canada<br> <br> Someone else picked up on that idea. Personally, I don't think they accelerate the<br> keys enough to compensate for the amount of extra work involved to level the keys.<br> Spot levelling is a real chore.<br> <br> One thing they do contribute to the lever system is to maintain the fulcrum close to<br> the pin. On a flat punching the fulcrum moves towards the front of the punching as<br> you depress the key.<br> <br> Regards,<br> </font><br> <div>Jon Page,   piano technician</div> <div>Harwich Port, Cape Cod, Mass.</div> <div><a href="mailto:jonpage@mediaone.net" EUDORA=AUTOURL>mailto:jonpage@mediaone.net</a></div> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ </html>