Davy Lamp

It must be remembered that methane can be liberated in a coal mine, not only in the coal itself, but in the nearby stone. It is therefore necessary to use permitted explosives, both in and near a seam of coal. Further, before any shot is fired in a coal mine, tests are made for the presence of methane in the air by means of a safety lamp. This safety lamp is the well-known Davy lamp and an experienced operator can judge the presence of methane in the air from the appearance of the flame. Tests are made... 

Coal Mines, Determination of Firedamp and of Coal Dust In Atmospheres of. Although many instruments have been designed to detect the presence of firedamp (or rather methane) in mine atmospheres, the principles of the flame safety lamp (Davy-type lamp) still form the basis of many detectors. The Davy lamp invented in 1815 is briefly described under COAL MINE EXPLOSIONS AND FIRES and it is stated that each US mine should have at least two Davy-type lamps to serve as detectors of firedamp or of lack of oxygen. If firedamp is present in small quantity, the flame of Davy lamp elongates and if the gas is present in considerable quantity, the lamp becomes filled with blue flame. For more definite detection of gas, the flame of the lamp is lowered until the yel part is at a minimum. Then the gas will be discernible as a small blue cap over the flame. This method is described in Refs 1, 9, 12 25. Some investigators consider that the safety lamp method of detection of firedamp is not very reliable (Ref 7)... 

Corpse Light. It is the blue flame inside the Miner s Safety Lamp, also called Davy Lamp,... 

Coal Mines, Determination of Firedamp and of Coal Dust in Atmospheres of. Although many instruments have been designed to detect the presence of firedamp (or rather methane) in mine atmospheres, the principles of the flame safety lamp (Davy-type lamp) still form the basis of many detectors. The Davy lamp invented in 1815 is briefly described under... 

He recognised that Chlorine was an element in 18 lOAD. His most practical invention was the Davy Lamp, a safety lamp used by miners in the pits. 

This type of reaction allows the way in which the DAVY lamp for miners works, to be explained the grid blocks the exit of the free radicals present in the flame. 

Davy, Sir Humphry (i778-i829) British chemist, who studied gases at the Pneumatic Institute in Bristol, where he discovered the anaesthetic properties of dinitrogen oxide (nitrous oxide). He moved to the Royal Institution, London, in 1801 and five years later isolated potassium and sodium by electrolysis. He also prepared barium, boron, calcium, and strontium as well as proving that chlorine and iodine are elements. In 1816 he invented the Davy lamp. 

R. L. Galloway, Annals of Coal Mining and the Coal Trade. The Invention of the Steam Engine and the Origins of the Railwayy 1898 ib.y Second SerieSy 1904 (with portr. of John Buddie, with steel mill and Davy lamp) 1898, i, 109. 

Davy, Stephenson, and Clanny, did not patent their lamps this came later, the patentees (e.g. Upton and Roberts) usually discrediting the original lamps and declaring them unsafe. Murray of Hull spoke of the Davy lamp as a deadly little instrument . Ansted, on the other hand, reported that in his experience it was safe. Davy in 1817 received a service of plate worth 2,50o Stephenson a silver tankard and oo and Clanny the silver and gold medals of the Society of Arts, and in 1848 a silver salver and ioo. Davy s plate, of which he was very proud, was bequeathed to the Royal Society by his brother John, with the instruction that it should be melted down and sold to found a medal. The first recipients of the Davy Medal were Bunsen and Kirchhoff in 1877. 

A replica Davy lamp with apertures for measuring flame height... 

Davy lamp - http //commons.wikimedia.0rg/wiki/File Pieler safety lamp.jpg... 

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