Chickering damper reg.

Yardbird47@aol.com Yardbird47@aol.com
Wed, 17 Jan 1996 23:54:04 -0500


Stanwood rote 1/17/96:
<<I once replaced a Chickering Brown action with modern Herz-Erard type
parts, using the old stack rails and modifying the balance rail position.
 The old wips were "fanned" so I made vertical cuts on each flange where they
meet the rail to match the angle. >>

I once replaced a Chickering 123 action using Pratt, Read parts and Clemanson
action brackets. (I made my own hammer and rep rails so the new hammer and
rep centers would sit in the same spot as the old ones.) Of course the shanks
and reps were fanned. New Japanese copy P,R shanks dropped right on the rail,
an exact match. The rep flanges were a different story. The old ones had
horizontally nounted milled-brss flanges (1/8" thick). The new rep wooden
flanges were the full thickness, which meant that with their increased
dimension, the thickness of the shank rest rail needed to be correspondingly
decreased. I squeaked by with a strip of felt covered aluminum as a rest
rail.

If I had my router-in-a-radial-arm-saw-yolk operational I suppose I could
have notched the back of the rep rail at the angles specified by the fan.
That would have alowed me the conventional veritcal mounting of the rep
flanges

Presumably with the damper underlever flanges, you could also either mount
them horizontally making whatever correction in the hieght of that top
surface of the underlever tray was necessary to insure that the center didn't
mount when you changed its mounting from vertical to horizontal. Or as David
describes, you could notch the from wall of the tray so that the notch that
each flange was fastened to was at the angle required to produce the fan. The
you have to insure that as the angle of each lever changes across the fan,
that the resulting hypotenuses will bring the front ends of the levers into a
straight line which can meet the straight line at the key ends. (If you heat
wood up, it'll stretch like taffy, right?) (Chris Robinson and Rick Baldassin
know how to do all this stuff and will be glad to field questions, even at
5:30AM <g>.)

Bill Ballard RPT
NH Chapter PTG

"There are day people and there are night people, and they will unconsciously
seek each other out so they can drive each other crazy".......AM Radio
Psychologist Dr. Joy Browne




This PTG archive page provided courtesy of Moy Piano Service, LLC