Look,
All a modern cooking element is, is a MIMS cable except it has a Cuprothal element running through the centre of it.
The outer sheath is always at Earth potential for safety reasons.
The same goes for a kettle element, only difference is, a kettle element is nickel-plated.
C-H,
Having live parts inside an oven that early in the sales of appliances would have killed that brand, considering there were no self-cleaning ovens back then.
Most were cleaned by hand at that stage, with a wet cloth.
