Some older locos had a heating element with a small oven below. You could heat things such as pies on them. Where there was only a heating ring, which only held a Tea Can you could heat a pie or whatever by wrapping it in tin foil and laying it on the ring at a low setting over a longish period. Heating rings usually have three settings. Low, Medium and High.
Some Tea Cans had a bit of a rim at the bottom which kept the bottom off the hot plate and would take ages to reach boiling point, if at all. This was usually solved by placing a coin on the hotplate that made contact with the base of the tea can.
Some Tea Cans had a bit of a rim at the bottom which kept the bottom off the hot plate and would take ages to reach boiling point, if at all. This was usually solved by placing a coin on the hotplate that made contact with the base of the tea can.