I've finally identified one of the mystery tools from the first post, the engine with the blue frame & guard with a K in it.
It's a Krestronics KGC-3 Charge-A-Lite generator, same outputs as a Tiny Tiger but with a belt driven generator. The article below is from the Popular Science March 1962 edition, which is available online here; https://books.google.co.uk/books?id=OyEDAAAAMBAJ&pg=PA172#v=onepage&q&f=false
I'm guessing it wasn't as popular as the direct drive generators like the Tiny Tiger or Amp-Champ as no complete generator has been found yet.
There is a much bigger article on this generator in the Popular Mechanics April 1962 edition, the pictures look like a prototype version of it though. Available here; https://books.google.co.uk/books?id=F-EDAAAAMBAJ&pg=PA128#v=onepage&q&f=false
David