Key leveling device

[Phillip Ford]

I believe that I've come across the patent for the key leveling device that 
was mentioned a few days ago.  The device is essentially a giant drop screw 
through the key just in front of the balance rail pin.  The head of the 
screw rests on the balance rail and is turned to level the key.

Patent 1,592,778 to L. Perry for Ludwig & Co. on July 13, 1926.

Phil Ford