Doug Brandt happened upon a very unusual piano in March 2007. He has a customer who owns an upright made in 1896 by the Thomas Brett company, which has a unique tuning mechanism. The mechanism consisits of a screw pushing against a metal crescent-shaped tension hook which pulls on the string. It's so unique, it led him and Mark Ritchie on an internet search to find Brett's original patent. To see the patent, go to US Patent Office , then enter the patent number: 363720
