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