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MMD > Archives > February 2017 > 2017.02.13 > 02Prev  Next

Horizontal Grooves in 1928 Welte Tracker Bar
By Allen Ford

[ Ref. 170207 MMDigest, Extra Holes in Ampico B Tracker Bar ]

Hi all,  This looks like the 1928 Welte Original tracker bar that was
in a piano I had at one time.  The extra holes were to atmosphere to
minimize tracker bar friction, and not to increase but to _decrease_
the drag on the roll motor.

A picture of the entire tracker bar might show either this fact or that
this concept was used by Ampico after the failure of Welte or after
Aeolian-American purchased the remains of Welte.

I currently have a Charles M. Stieff Welte.

Allen E. Ford

(Message sent Mon 13 Feb 2017, 18:28:20 GMT, from time zone GMT-0800.)

Key Words in Subject:  1928, Bar, Grooves, Horizontal, Tracker, Welte

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