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Eli Terry was using interchangeable parts using a milling machine as early as 1800. Ward Francillon, a horologist, concluded in a study that Terry had already accomplished interchangeable parts as early as 1800. The study examined several of Terry's clocks produced between 1800–1807. The parts were labelled and interchanged as needed.
The younger Eli was famous during his lifetime and after his death by the name "Eli Whitney", though he was technically Eli Whitney Jr. His son, born in 1820, also named Eli, was known during his lifetime and afterward by the name "Eli Whitney Jr." Whitney's mother, Elizabeth Fay, died in 1777, when he was 11. [2]
Colt's great contribution was the use of interchangeable parts. Knowing that some gun parts were made by machine, he envisioned all the parts of every Colt gun to be interchangeable and made by machine, to be assembled later by hand. His goal was an assembly line. [18] This is shown in an 1836 letter that Colt wrote to his father in which he said:
In 1793, Eli Whitney invented the cotton gin and later received a patent on March 14, 1794. [31] Whitney's cotton gin could have possibly ignited a revolution in the cotton industry and the rise of "King Cotton" as the main cash crop in the South. However, it never made him rich.
The cotton gin, invented by Eli Whitney, revolutionized slave-based agriculture in the Southern United States. The technological and industrial history of the United States describes the emergence of the United States as one of the most technologically advanced nations in the world in the 19th and 20th centuries.
Eli Whitney, holding a 1798 United States government contract for the manufacture of muskets, is introduced by Oliver Wolcott Jr. to the concept of interchangeable parts, an origin of the American system of manufacturing. [109]
Simeon North (July 13, 1765 – August 25, 1852) was an American gun manufacturer, who developed one of America's first milling machines (possibly the very first) in 1818 and played an important role in the development of interchangeable parts manufacturing.
The idea of interchangeable parts and the separate assembly line was not new, though it was little used. The idea was first developed in East Asia during the Warring States period and later the Qin dynasty over 2200 years ago – bronze crossbow triggers and locking mechanisms were mass-produced and made to be interchangeable.