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The earliest pipes were made of clay, and are found at the Temple of Bel at Nippur in Babylonia. [126] [b] 4000 BC: Oldest evidence of locks, the earliest example discovered in the ruins of Nineveh, the capital of ancient Assyria. [129] 4000 BC – 3400 BC: Oldest evidence of wheels, found in the countries of Ukraine, Poland, and Germany. [130 ...
Copperweld Steel went public for the first time in 1929, shortly before the onset of the Great Depression, but its shares were eventually withdrawn. The United States government was the company's major client throughout the Depression and World War II , and its patronage is largely responsible for keeping the company solvent in that time of ...
During the 1920s, significant advances were made in welding technology, including the introduction of automatic welding in 1920, in which electrode wire was fed continuously. Shielding gas became a subject receiving much attention, as scientists attempted to protect welds from the effects of oxygen and nitrogen in the atmosphere.
1912 – Stainless steel invented by Harry Brearley; 1916 – Method for growing single crystals of metals invented by Jan Czochralski; 1919 – The merchant ship Fullagar has the first all welded hull. 1924 – Pyrex invented by scientists at Corning Incorporated, a glass with a very low coefficient of thermal expansion
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. Sullivan was a tea and coffee merchant in New York who began packaging tea samples in tiny silk bags, but many customers brewed the tea in them. [92]
Weston Miller Fulton (August 3, 1871 – May 16, 1946) was an American meteorologist, inventor, and entrepreneur, best known for his invention, the "sylphon," a seamless metal bellows used in thermostats, switches, and other temperature-control devices. [1]
A welder is a person or equipment that fuses materials together.The term welder refers to the operator, the machine is referred to as the welding power supply.The materials to be joined can be metals (such as steel, aluminum, brass, stainless steel etc.) or varieties of plastic or polymer.
The mechanical production of dry photographic plates were invented by George Eastman who filed U.S. patent #226,503 on September 9, 1879, for (in his own words "An Improved Process for Preparing Gelatine Dry-Film Plates") which was issued to him on April 13, 1880. [156] [231] 1879 Carton