Timeline of United States inventions (1890–1945)
Air conditioning is the cooling and de-humidification of indoor air for thermal comfort. Using a system of coils as a solution to cool and remove moisture from muggy air in a printing plant that was wrinkling magazine pages, Willis Carrier invented and manufactured the world's first mechanical air conditioning unit in 1902. Carrier's invention – encompassing the first system to provide man-made control over temperature, humidity, ventilation and air quality, was first installed as a solution to the quality problems experienced at a Brooklyn printing plant, Sackett-Wilhelms Lithographing and Publishing Company. Air conditioning not only spawned a company and an industry, but also brought about profound economic, social and cultural changes.
The Icee Company
Knedlik partnered with the John E Mitchell Company in Dallas to develop the machine, for which Knedlik received a patent in 1960. The first machine was made from a car air conditioning unit. It worked by combining and freezing water, carbon dioxide, and a flavor mix. After 5 years Knedlik's idea had become the iconic Icee Machine after drawing the attention of 7-Eleven. The convenience store chain purchased several machines and later changed the name to Slurpee based on the slurping sound people make when drinking the beverage.