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David N. Crosthwait Jr. (May 27, 1898 – February 25, 1976) was an African-American mechanical and electrical engineer, inventor, and writer.Crosthwait's expertise was on air ventilation, central air conditioning, and heat transfer systems.
The rise of the Sun Belt was the culmination of changes that began in American society starting in the 1950s, as cheap air travel, automobiles, the interstate system, and the growth of air conditioning all spurred a mass migration south and west.
Air conditioning not only spawned a company and an industry, but also brought about profound economic, social and cultural changes. [11] 1903 Tea bag. A tea bag is a small, porous paper, silk or nylon sealed bag containing tea leaves for brewing tea. Tea bags were invented by Thomas Sullivan around 1903. The first tea bags were made from silk.
cleanse the air; After several more years of refinement and field testing, on January 2, 1906, Carrier was granted U.S. patent 808,897 for an Apparatus for Treating Air, the world's first spray-type air conditioning equipment. It was designed to humidify or dehumidify air, heating water for the first function and cooling it for the second.
Central, "all-air" air-conditioning systems (or package systems) with a combined outdoor condenser/evaporator unit are often installed in North American residences, offices, and public buildings, but are difficult to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. [32] (Minisplit ...
Goettl worked throughout his life in the HVAC community. With his brother, Adam, they founded Phoenix-based Goettl Air Conditioning on February 14, 1939. [2] During World War II, the Goettl brothers shifted their focus to manufacturing operations, contributing to the war effort and highlighting the potential value of cooling technology.
His invention controlled both the temperature and humidity, which helped maintain consistent paper dimensions and ink alignment at the printing plant. Later, together with six other employees, Carrier formed The Carrier Air Conditioning Company of America, a business that in 2020 employed 53,000 people and was valued at $18.6 billion. [30] [31]
A Servel Robur air conditioner compressor unit on Governor's Island, New York City. Servel was an American manufacturer of heating and cooling appliances, founded in 1922. Founded by Colonel William McCurdy to produce refrigerators and named National Electric Products Company, the company adapted and shortened the name "Servel" from their ...