Titel
A ‘bonnetted’ Clanny lamp, no 19, c 1882.
Caption
The ‘bonnetted’ Clanny is an updated version from the Royal Commission on Accidents in Mines (1879-1886) of the original Clanny lamp. This safety lamp, designed by Dr William Reid Clanny (1776-1850), reduced the risk of explosions caused by 'firedamp', a gas composed mainly of methane which is found in deep mines. It is made of nickel and silver and has a dioptric lens. The air for supplying the flame comes in through the bottom of the gauze and passes down the inner side of the glass, protecting it from overheating. The disadvantages of this lamp were that a lot of light was lost by absorption in the glass, and it was heavier and more expensive than the Davy lamp. Safety lamps started to be replaced with electric mine lighting devices after 1900., 6955010
Aufnahmedatum
01.01.2009
Bildnachweis
Science & Society / FOTOFINDER.COM
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10304359
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3504px x 3465px, 29,70 cm x 29,30 cm (300 dpi)
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United Kingdom
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