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Ritchie thought they could be improved upon, and by 1860 had received a U.S. patent for the first successful and practicable liquid-filled marine compass suitable for general use, [10] [11] a development that has been described as the first major advance in compass technology in several hundred years. [12]
Song dynasty figurine of a man holding a compass. The compass is a magnetometer used for navigation and orientation that shows direction in regards to the geographic cardinal points. The structure of a compass consists of the compass rose, which displays the four main directions on it: East (E), South (S), West (W) and North (N). The angle ...
Edward Samuel Ritchie, considered to be the most innovative instrument maker in nineteenth-century America, receives a U.S. patent for the first successful and practicable liquid-filled marine compass suitable for general use.
Naval Unit, Air Technical Document Research Unit, Camp Ritchie, Maryland Naval Unit, Edgewood Arsenal, Edgewood, Maryland Naval Unit, Special Projects Division, Chemical Warfare Service, Camp Detrick.
Ritchie Bros. Auctioneers was established in Kelowna, British Columbia, Canada, when the three Ritchie brothers – Ken, John and Dave Ritchie – took over the OK Used Furniture Store from their father in 1955. They entered the auction business in 1958.
Auchinleck realised a change in command was necessary and on 25 June he relieved Ritchie and assumed command of the Eighth Army. [15] He issued directives to change the Eighth Army into a force that stressed mobility and made it clear that his priority was to keep the Eighth Army intact. [ 16 ]
Horace Ezra Bixby (May 8, 1826 – August 1, 1912) was a steamboat pilot on the Mississippi-Missouri-Ohio river system from the late 1840s until his death in 1912. [1] Bixby is notable in his own right for his high standing in his profession, for his technical contributions to it, and for his service in the American Civil War.
Donald Sinclair died at his home, Compass South, in Ilsham Marine Drive in Torquay, on 5 September 1981, at the age of 72. [1] According to The Spectator , his death, from a heart attack and stroke, resulted from an event in August when "some workmen he'd upset painted his patio furniture and car gunmetal grey during the night."
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