Corning, Coloric and Amana Ranges
Were all linked at one or another. Corning was the first successful and best ever glass top cook-top, originally all four elements were thermostatically controlled and required the use of Corning-ware Cook-mates ground perfectly flat cookware, [ Visions cookware was never recommended and would have been a poor choice for these ranges ]. You could also use really flat metal cookware and get good results. Later they came out with the 3+1 cook-tops where one element was not thermostatically controlled, this one element [ like smooth-top stoves today ] will get up to around 1000 degrees where as the other three elements were limited to around 550 degrees max temperature.
Corning's first freestanding range was made by GMs Frigidaire [ this range in my expert opinion was the best built Corning or Amana range ]. By the early 1970s Corning started building the complete range and while they were fairly well built ranges they still had a lot of problems they should not have had [ the range that Cory posted was the Corning design ].
Ratheon the owner of Amana went on to buy Caloric a good builder of gas ranges here in Pennsylvania and Caloric sometime in the early 1970s had purchased the Philco Ford Electric range plant in Philadelphia Pa. and started building a fairly good electric range. This now Caloric plant in Pennsylvania started building the Micro-Electric and the worlds only Gas combination ranges where the large self-cleaning oven would MW and heat at the same time if desired. These great ranges were sold under the Caloric, Amana and Montgomery Wards names, [ I currently have the MW Microwave Gas range on my screen porch, Tom and my partner have the electric versions in there homes and they are used almost every day ] and use it a good bit when the whether is hot and in cooler whether I use the Thermador MW combination in the kitchen ]