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The Davy lamp is a safety lamp used in flammable atmospheres, invented in 1815 by Sir Humphry Davy. [1] It consists of a wick lamp with the flame enclosed inside a mesh screen. It was created for use in coal mines , to reduce the danger of explosions due to the presence of methane and other flammable gases, called firedamp or minedamp .
Early self-contained respirators were designed by mining engineers such as Henry Fleuss to help in rescue efforts after fires and floods. While canaries were typically used to detect carbon monoxide, tools such as the Davy lamp and the Geordie lamp were useful for detecting methane and carbon dioxide, two asphyxiant gases. When methane was ...
A Davy lamp. In the Davy lamp a standard oil lamp is surrounded by fine wire mesh or gauze, the top being closed by a double layer of gauze. If firedamp is drawn into the flame it will burn more brightly and if the proportions are correct may even detonate. The flame on reaching the gauze fails to pass through and so the mine atmosphere is not ...
The Davey Safety Lamp was made in London by Humphry Davy. George Stephenson invented a similar lamp but Davys invention was safer due to it having a fine wire gauze that surrounded the flame. This enabled the light to pass through and reduced the risk of explosion by stopping the "firedamp" methane gas coming in contact with the flame.
Firedamp (1889) by Constantin Meunier depicts the aftermath of a mining disaster Stephenson's safety lamp shown with Davy's lamp on the left. Firedamp is explosive at concentrations between 4% and 16%, with most explosions occurring at around 10%. It caused many deaths in coal mines before the invention of the Geordie lamp and Davy lamp. [4]
It also led Sir Humphry Davy to devise another safety lamp, the Davy lamp, in which the flame was surrounded by iron gauze. The gauze had to have small spaces so that a flame could not pass through, but could admit methane, which then burned harmlessly inside the lamp. The height of the luminous cone above the flame gave a measure of the ...
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