> Have a look in Google at "propeller clocks" They have good ideas
> about transmiting power in a motor shaft.

Thanks. I'd seen Bob Blick's pages some time ago and one was
powered using a rotary transformer (the others use modification
of the motor, which isn't an option here). Unfortunately there are
no details on that rotary transformer and I've got no reply from the
author

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.