replacement hammer butt springs

[Farrell]

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Funny you should mention bad felt John. Just last week I spent a day =
doing some refurbishing on an old original M&H upright from the 1890s - =
quite respectable shape for its age. I was putting all new felt on the =
keyframe and leveling keys, but the lady wanted to minimize costs, so =
the key bushings were OK and I figured I would not do anything with the =
keypins. Upon removal of the center rail pin punchings, I noticed that =
the center rail keypins were all corroded just at the bottom where the =
felt punchings were. The front key pins were fine - no corrosion. But =
the center rail pins were trashed - I had to replace them. Bottom line =
though, I can only assume the two rails had been exposed to similar =
environmental conditions for the past 110 years, but only the center =
rail pins corroded - likely the felt punchings I presume? I wonder what =
it could be about the felt that would cause corrosion like that.

Terry Farrell
  ----- Original Message -----=20
  From: John Ross=20
  To: Pianotech=20
  Sent: Thursday, August 05, 2004 8:23 PM
  Subject: Re: replacement hammer butt springs


  Hi Elwood,
  I suppose those repair springs might be ok, in an emergency.
  But, I would recommend, installing the proper new springs on the rail. =
If some are bad, the rest are on the way.
  If you do replace the springs, make sure to remove, any felt that =
might be there. Impurities in the felt, was what caused the problem, in =
a lot of pianos from the late 70's and 80's
  Regards,
  John M. Ross
  Windsor, Nova Scotia, Canada
  jrpiano@win.eastlink.ca
    ----- Original Message -----=20
    From: Elwood Doss, Jr.=20
    To: Pianotech List=20
    Sent: Thursday, August 05, 2004 8:48 PM
    Subject: replacement hammer butt springs


    Anyone have any good ideas regarding installing repair hammer butt =
springs in an Acrosonic spinet?  I have the kind of springs that has a =
flat plate (really small) with a slot in it for placing a screw in it.  =
Anyone tried using thick CA glue or that new "gorilla glue" to attach it =
to the hammer butt spring rail?  Just wondered.
    Joy!
    Elwood=20

    Elwood Doss, Jr., RPT
    Piano Technician/Technical Director
    Department of Music
    145 Fine Arts Building
    University of Tennessee at Martin
    Martin, TN  38238
    731-881-1852
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