This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment I have this A. B. Cameron upright, NY, 1911. The key bed is 2" thick, = laminated like a cutting board. It is flat as can be side to side and = only the slightest crown front to back. The backrail of the keyframe = scups up slightly, the screws being slightly forward of the felt and = when I screw the balance rail in, it tilts the back rail up even more. = The shims all were between the balance rail and the frame, not the frame = and the bed. When I pulled the frame, the front to back slats had been = thinned across the center to allow for a not so flat bed, and the frame = had been run through a milling/surfacing machine that, from the radius = cut marks on the front and back rails, had about a 2' diameter cutter = wheel.=20 This led me to believe the backrail/frame had warped and needed to be = fastened to the bed with some more screws. The cupping of the back rail = was apparent with a straight edge. I figured seasonal changes might play = havoc with the lost motion and key dip, since the back rail was floating = in the air like that. However, with every 'thunk' I started wondering if the sound of the key = returning might be a bit loud with one of these heavy stickered 'cabinet = grand' action. Is it possible it was designed to come up in the air when = the center rail was screwed down in order to minimize noise? The cupping = wouldn't even matter if that was the case. Or am I going stir crazy and = thinking to much? I think I going downtown to hear some live music. Keith R P.S. This company built 1200 to 1400 pianos a year from 1897 to 1928 = when they went to building 1000 pianos a year until 1938 when they = closed. Nice not- jammed together scale. Obviously a craftsman. ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/19/3a/ee/8a/attachment.htm ---------------------- multipart/alternative attachment--
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