ok
this seems pretty far fetched
but rolex (as far as i recall ) had come up with a way to run a watch perpetually(it said something about utilizing atmospheric pressure ). that means it require no extra mehanical power to run.
u could understnd how that works, and use it as the switch .
as for the amp. try using bells' model
(it ran mechanically ).
u will havt to wound up the amp. and the switch will be triggered, running the discs.
(i have remove all the electronics out of it though 
)