Very interesting, I didn't know that electric heaters were well known in the USA, as I thought the maximum wattages for a 115v socket would have made them ineffective compared to a European appliance running on twice the voltage, and it's delightful to see I was wrong - the art deco Markel and green Arvin are especially striking.
Al, thanks for posting the Belling brochure, I can't help but feel that there's an irony that some of the fires qualified for a Clean Air Act grant, considering that most of of power stations were coal fired back then! I do think that the 'Adam' was one of the ugliest fires ever!
My family had a Paraffin (Kerosene) heater until around 1979-80. Our flat was equipped with an electric fire in the living room, but my mum wouldn't use it as it cost too much for her to run. I think we used Pink Paraffin, and I remember my mum going out to the Paraffin man with our neighbours - he'd drive from street to street in his lorry, like selling ice cream. In winter we used to get dressed and even wash in front of it, as the only other heating in the flat was one of those combined lamp/heaters in the bathroom, and it couldn't cut it in northern Scottish winters. Luckily for us, my grandad was a gas engineer, and we eventually got gas heating and a Berry Magicoal fire put in at family rates!
I do think safety can be an issue with older electric fires though. The lack of safety cutouts, and the skimpy element guarding on some (an uncle of mine was injured as a child as he grasped a live bar type element) makes them a worry, and I notice some of the above seem to be Class 0 or 01 - single insulation with no earth.
Also, although I think one mustn't panic too much about asbestos content in vintage appliances, I own a couple of 1930s fan heaters that I bought from a family with children who used them sometimes. Part of the construction involved strips of asbestos mat to keep the elements separate, but some of the strips were deteriorating to the extent that they had started to crumble and asbestos dust was present - and would have been blown out into the room if the fire were switched on. One has since been stripped down outside, with the asbestos dampened and double-bagged, the other is still wrapped in a couple of bin liners, but I understand that there are asbestos substitutes available.