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Who was John Harrison? John Harrison was a carpenter by trade who was self-taught in clock making. During the mid-1720s he designed a series of remarkable precision longcase clocks. These clocks achieved an accuracy of one second in a month, far better than any clocks of the time.
Apr 3, 2018 · Today, on what would have been Harrison’s 325th birthday, Google is celebrating the legendary horologist with a special Doodle. John Harrison, (1693-1776). Inventor of the marine...
May 17, 2014 · This machine was the first of John Harrison's clocks, known as H1, predating all those other chronometers, and representing his first attempt to make a timekeeper that would remain accurate on ...
John Harrison Biography. John Harrison (24 March 1693 – 24 March 1776) was a carpenter and watch-maker. He invented the marine Chronometer which enabled a ship to accurately know its longitude at sea (position on east-west access) His invention was critical in the development of long-distance seafaring, which was very important in the ...
Jul 17, 2020 · How John Harrison invented the first portable precision timekeeper. By Jonathan Betts. July 17th 2020. It’s been over 50 years now since Colonel Humphrey Quill wrote his biography (1966) of the great pioneer of the marine chronometer, John Harrison (1693–1776). Since then, there has been a increasing interest in Harrison and the events ...
John Harrison. 1693-1776. English Horologist. Perhaps the most famous clockmaker of all time, John Harrison solved the problem of reliably calculating a ship's longitude while at sea. By designing a highly accurate clock that allowed mariners to chart their position on Earth far more precisely, Harrison solved one of the most important ...
John Harrison. Portrait of John Harrison by James King, about 1766. A stunning technical breakthrough came when English carpenter and clockmaker John Harrison built five experimental sea clocks between 1735 and 1772. With them, he demonstrated the feasibility of accurate timekeeping at sea.
