I have a vacuum pump from a Welte Philharmonic organ 10-roll changer.
The changer was built by Automatic Musical Instrument Company [AMI]
of Grand Rapids, Michigan, with pneumatic parts supplied by Welte.

Is the pump itself built by AMI or is it from some other supplier?
One person told me it is by Monarch Tool & Manufacturing of Cincinnati,
Ohio, and that the same pumps were used in the Auto-Typist.

Thanks.

Dave Krall

 [ Vacuum pump from a Welte Philharmonic organ 10-roll changer
 [ http://www.mmdigest.com/Attachments/13/11/25/131125_195353_100_31201.JPG