hosted on condor3913
 Mechanical Music Digest  Archives
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Archives > May 2000 > 2000.05.19 > 11Prev  Next

Hupfeld Wind Motor Governor
By Roger Waring

I have recently acquired a Hupfeld Upright and would like to know if
there is any special regulating technique necessary for the wind motor.

The lower action arrangement comprises a control pneumatic tensioned
in the open position by a fixed 6-inch "Y" spring, the type usually
found on pedal exhausters, rather than an adjustable coil spring.  It
appears non-adjustable.  I have replaced the rather weak original "Y"
spring with a new one from PPCo.

An external 1-inch diameter threaded wooden wheel allows some
regulation by limiting the maximum operating span of the pneumatic.
From trial and error, it seems that restricting the span speeds up
the motor and opening it slows it down.  I have now got to a point
where performance is adequate, but not perfect.

The problem is that no setting seems to completely prevent a
slight increase in tempo when pumping hard.  Is there some other
variable element that I have missed or is it just a case of further
experimentation?  I have to say that the motor performs very well when
pumping softly.  Should I revert to the weaker spring?

The new one is considerably stronger and requires quite a lot of
suction to close it, whereas the original closed very easily and was
more inclined to slow down and even stop on hard pumping.  All replies
acknowledged.  Many thanks.

Roger Waring

(Message sent Fri 19 May 2000, 09:40:00 GMT, from time zone GMT+0100.)

Key Words in Subject:  Governor, Hupfeld, Motor, Wind

Home    Archives    Calendar    Gallery    Store    Links    Info   

Enter text below to search the MMD Website with Google

CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2023 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Pay via PayPal

No PayPal account required

Translate This Page