Thought this might help someone with a tubing chart for their
reproducing player piano.

Sincerely, Jeff Bridges

http://www.google.com/patents?id=inp5AAAAEBAJ&dq=lock+and+cancel

http://www.google.com/patents?vid=USPAT1639105
  Reproducing Piano
  Patent number: 1639105
  Filing date: Jul 12, 1921
  Issue date: Aug 1927
  Inventor: S. H. Perron
  Assignee: Alexander Steinert

http://www.google.com/patents?vid=USPAT4161901
  Dynamically adaptive player piano roll to magnetic tape formatting system
  Patent number: 4161901
  Filing date: May 2, 1977
  Issue date: Jul 24, 1979
  Inventor: Henry V. Walker
  Assignee: Teledyne Industries, Inc.

 [ This is the Pianocorder system commissioned by Joe Tushinsky.
 [ -- Robbie