Antique 1858 Lord Kelvin Ships Pressure Depth Indicator

Antique 1858 Lord Kelvin Brass Pressure Depth Indicator
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âe¦âe¦ This auction is for a rare Scientific Depth Gauge invented by the Scottish Inventor Lord Kelvin. According to âeoe Dec 17, 2007 Lord Kelvin was a successful inventor and wealthy businessman and perhaps the most important physicist of the 19th century. David Saxon explains how Kelvin played key roles in everything from thermodynamics and electric lighting to transatlantic telecommunication and the age of the Sun. His most notable enterprise was the laying of the first transatlantic telegraph cable between Ireland and Newfoundland in 1858âe"1866. This was an epic undertaking with huge practical difficulties and Kelvin did much of the original scientific work and inventions that made it possible. A fundamental problem facing the Atlantic Telegraph Company, of which Kelvin was a director, was that no one knew how deep the ocean was. Attempts to measure the depth by simply dropping a very heavy weight at the end of a cable always resulted in the cable reel breaking. Kelvin solved this problem by inventing a compact device that could be lowered on a piano wire and measured the pressure difference between the surface and sea floor, from which the depth could be calculated.âe âe¦ This auction is for one

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