Pianotech

1.  Kimball upright balance rail

Posted 10 days ago
I just serviced an old, heavily decorated Kimball upright, probably circa 1900 with an unusual balance rail.  The balance rail pins swivel with the key in slots in a separate guide rail (see photos).
Has anyone seen these before.  It appears to be serviceable, though nearing the end of its practical life.

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Blaine Hebert
Duarte CA
626-795-5170
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2.  RE: Kimball upright balance rail

Posted 10 days ago
Since the top pin is fixed I the key, what stabilizes the key at the bottom, pivot location?

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Regards,

Jon Page
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3.  RE: Kimball upright balance rail

Posted 9 days ago
Removing one key to see how it works would involve disassembly of the fall-board and key rail; eventually I probably will pull a few keys out.

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Blaine Hebert
Duarte CA
626-795-5170
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4.  RE: Kimball upright balance rail

Posted 10 days ago
I haven't seen anything like that. Interesting.

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John Formsma, RPT
New Albany MS
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5.  RE: Kimball upright balance rail

Posted 10 days ago
Interesting arrangement. The keys are much stronger this way, less prone to break. No chance of chucking keys, since there's no rocking at the balance rail hole. I guess if you need to square the keys, you'd have to bend the pin. Looks easy to replace the bushing felt. Would have been nice to get a photo of the rail under the keys. My imagination is that the pins are inserted into a wooden dowel, drilled in the center, and held by a long metal rod, which would act as the pivot. Or, a bushed slot underneath, like a key button with the pin inserted from the top.
Too bad, Kimball did actually know how to make a good piano. At least back then.
Paul McCloud
San DIego


I just serviced an old, heavily decorated Kimball upright, probably circa 1900 with an unusual balance rail. The balance rail pins swivel with the key in slots in a separate guide rail (see photos).
Has anyone seen these before. It appears to be serviceable, though nearing the end of its practical life.

------------------------------
Blaine Hebert
Duarte CA
626-795-5170





6.  RE: Kimball upright balance rail

Posted 10 days ago
If all keys pivot along a straight line, naturals and accidentals will have different key ratios.

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Ed Sutton
ed440@me.com
(980) 254-7413
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7.  RE: Kimball upright balance rail

Posted 9 days ago
Perhaps one reason why this is not more common?

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Blaine Hebert
Duarte CA
626-795-5170
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8.  RE: Kimball upright balance rail

Posted 9 days ago
Thanks for posting this Duane. I have never seen this before. I am dying to know how they fixed the key at the bottom. Are there key leveling screws you can access from the underside of the key-bed?

Please get this information and post it. I would even pay for it I am so curious.

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Edward McMorrow
Edmonds WA
425-299-3431
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9.  RE: Kimball upright balance rail

Posted 9 days ago
Ah crap, I meant Blaine! Brain fart on my part. SORRY

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Edward McMorrow
Edmonds WA
425-299-3431
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10.  RE: Kimball upright balance rail

Posted 8 days ago
I expected many comments like, "Oh I just did one last week" or "I see these all the time".  If this is very rare perhaps I can schedule a free service call to take a few more pictures.  Otherwise I will see it next year.

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Blaine Hebert
Duarte CA
626-795-5170
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