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MMD > Archives > July 2006 > 2006.07.27 > 08Prev  Next


Auto-Electric Coin Piano Friction Disc Drive
By Philip Jamison

I'm working on the interesting 44-note Auto-Electric coin piano,
sold on eBay a couple months ago, which we speculate runs on 110 vdc.
It uses an endless roll with a d.c. electric motor drive.  It looks
like a friction disc drives the roll, rather like what Wurlitzer used.

The motor shaft is next to a drive disc made of leather sandwiched
between metal plates.  The d.c. motor is mounted so it slides left
and right.  The mystery to me is this: The motor shaft is missing
whatever fit on it to drive the roll, and the motor shaft is so
close to the leather disc (about 1/16"), I cannot see how it would
work.  Any ideas?

Regards,
Philip Jamison
Pennsylvania

 [ I'll place photos of the mechanism at the MMD Pictures site,
 [ http://mmd.foxtail.com/Pictures/  -- Robbie


(Message sent Thu 27 Jul 2006, 19:52:56 GMT, from time zone GMT-0400.)

Key Words in Subject:  Auto-Electric, Coin, Disc, Drive, Friction, Piano

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