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.
Refrigerator car
Edwin Tobias Earl was born on a fruit ranch near Red Bluff, California on May 30, 1858. His father was Joseph Earl and his mother, Adelia Chaffee. His brother was Guy Chaffee Earl.
Career. He started his career in the shipping of fruits. By 1886, he was President of the Earl Fruit Company. In 1890, he invented the refrigerator car to transport fruits to the East Coast of the United States. He established the Continental Fruit Express and invested US$2,000,000 in refrigerator cars. In 1901, he sold his refrigerator cars to Armour and Company of Chicago and became a millionaire.