Thomas A. Edison Papers. Electric Generator. In the fall of 1878, after experiments indicated that existing arc light generators were inefficient for incandescent lighting Edison and his chief assistants, Charles Batchelor and Francis Upton, investigated generator design and the principles of electromagnetism.
Size. The standard width of a residential range is 30 inches, but higher-end ranges can extend to 36 inches and beyond. The oven compartment on a typical range is 5 cubic feet, compared to just over 3 cubic feet in a typical wall oven.
Size Ranges. The narrowest kitchen stoves are 20 inches wide and used primarily in apartments and other kitchens where space is at a premium. Stoves in a variety of styles, including ones with a double oven and built-in models, range in width from 20 to 36 inches.