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Though Alexander Selligue is often mistakenly credited with the invention, he did invent an improved rangefinder with fixed lenses in 1821 and is responsible for coining the term. [3] [4] In 1881, the British Royal Artillery adopted the depression range finder, which had been developed by Captain H.S.S. Watkin for use by coastal artillery. It ...
Alexander François Selligue (1784-1845) was a French engineer. His name was in fact Alexandre François Gilles, but he used Selligue as an anagram of Gilles. In 1832, he together with David Blum patented an application of shale oil for direct illumination. In 1838, he patented "the employment of mineral oils for lighting".
4 Telemeter and rangefinder (again) 3 comments. 5 Telemeter as remote measuring instrument. 12 comments. 6 Selligue coined the term. 1 comment. 7 Ngram Analysis. 1 ...
The shale oil production started in 1838 by using Selligue process, invented by Alexander Selligue. [17] [24] In 1846 the Canadian physician and geologist Abraham Gesner invented a process for retorting an illuminating liquid from coal, bitumen and oil shale.
Naval range-finding instruments of 1936. Barr & Stroud Limited was a pioneering Glasgow optical engineering firm. They played a leading role in developing modern optics, including rangefinders, for the Royal Navy and other branches of British Armed Forces during the 20th century.
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