It must have been fun to be an inventor in the first half of the 20th century. Inspiration was everywhere. Throw "electric" onto the front of any household item and off you go. Throw "machine" onto the back of any daily chore and then you're off to the workshop.
If you were a sci-fi writer trying to imagine the future back then, I suppose you'd think "atomic" was going to be the new "electric." Gee, this new atomic blanket sure does keep me warm! Imagine how shiny your teeth will be with this new atomic toothbrush!