[LINK] Re: The watch without batteries

[Stewart Fist]

Karl writes
> 
> Are you guys taking the mickey?
> 
> Before batteries, there were wind-up watches... and the good ones kept
> *excellent* time.


And before windup wrist watches, there were electric clocks without
batteries.

In fact the first electric clock, invented by Alexander Bain who also
invented the fax machine and a couple of other important telegraph
repeater/generator systems, ran without any battery.

He used a couple of metal plates, one zinc and the other copper from memory,
buried outside in the garden, and that gave him enough power to keep the
pendulum swinging.


-- 
Stewart Fist, writer, journalist, film-maker
70 Middle Harbour Road, LINDFIELD, 2070, NSW, Australia
Ph +61 (2) 9416 7458