1, the earliest electric fan
1882, commercial electric fans first appeared in the United States. This household appliance with only two blades was invented by Huyskatz Hoyla, chief technician of Croca Katzis Engine Factory in new york. 1883, the factory began mass production of this kind of desktop electric fan. Twenty-five years later, the American Ecker Engine Electric Company developed the world's earliest gear-driven electric fan that shook its head from side to side.
2. The earliest refrigerator
19 13, Chicago, USA successfully developed the world's earliest household refrigerator. This refrigerator named "Duohai Road Asia" has a wooden shell and a compression refrigeration device installed inside.
3. The earliest electric light
1835 On July 25th, Scottish scientist James Bowman Lindsay succeeded in the experiment of continuous light emission with electricity in the laboratory, becoming the first person in the world to actually use electric light. Edison obtained a patent for electric light. 1880, Edison used carbonized paper as filament instead of carbonized kapok filament with short service life. In the same year 10 began mass production, and it was the earliest commercial electric lamp in the world. 1859 in July, Professor Mozes G. Fama of Newport Naval Training College installed his own platinum cap light bulb in the living room of Salem, Massachusetts, which was the earliest electric light installed in the home.