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

Our Spring Fundraising Drive is in progress. Please visit out home page to see this and other announcements:
http://www.mmdigest.com     Thank you. --Jody

MMD > Archives > October 2012 > 2012.10.10 > 04Prev  Next


Connecting Straps for Welte Licensee Pump
By Paul Rumpf

I have an Autopiano Recordo which I believe has the same pump that
Jonathan Holmes describe in the 121007 MMD.  The straps I have are a
canvas/rubber belting material about 1/4 inch thick.  I measured the
stroke at the end of a bellows and found it to be 39 to 40 mm.  The 
bellows is closing when the belt is compressed, but in this state the
bellows is being exhausted.

When the bellows is opening, the bellows is extracting air from the
system and the straps are under tension.  If the straps are flexing too
much, it suggests to me that maybe the straps are at fault.  But it may
be that the external flap valve on each bellows is not opening easily
enough.

My pump was reconditioned about twenty-six years ago.

Paul Rumpf
Melbourne, Australia


(Message sent Wed 10 Oct 2012, 22:45:41 GMT, from time zone GMT+1100.)

Key Words in Subject:  Connecting, Licensee, Pump, Straps, Welte

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 1995-2018 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

. .