Also interesting (especially that it lasted until 1994), but the system from this article was just for clocks - I don't think power tools could use power which

Also interesting (especially that it lasted until 1994), but the system from this article was just for clocks - I don't think power tools could use power which was only delivered for 20 seconds and then off for 40 seconds. If you translate that to computing, one system supplied the Vcc, the other supplied the (very slow) clock. No data lines unfortunately :)