People will think I'm weird for enthusing over the design of a toaster. But let them. Designed by the son of Czech immigrants, the Sunbeam T-20 is a marvel. You have to heat the bread, right? He harnessed that heating element to move the toast in and out of the machine. Then he used a thermostat so it toasted to a specified _temperature_, not a specified time (as modern ones do).

So simple that the only things which can go wrong have adjustments so you can correct them. Genius!