Praetor wrote:

I really wonder what that machine was.
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It was likely a tempophon (or similar device manufactured by a different company):
http://matrixsynth.blogspot.com/2007...tempophon.html
For details on how it works, see this link:
http://books.google.com/books?id=KMl...ound+tempophon
This link is also good, but there is a misspelling in the name:
http://www.sfu.ca/sonic-studio/handbook/Tempophone.html