Davy Lamp

The Davy lamp is a safety lamp for use in flammable atmospheres, consisting of a wick lamp with the flame enclosed inside a mesh screen. It was invented in 1815 by Sir Humphry Davy. It originally burned a heavy vegetable oil. 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.

Sir Humphry Davy had discovered that a flame enclosed inside a mesh of a certain fineness cannot ignite firedamp. The screen acts as a flame arrestor; air (and any firedamp present) can pass through the mesh freely enough to support combustion, but the holes are too fine to allow a flame to propagate through them and ignite any firedamp outside the mesh.

The news about Davy's lamp was made public at a Royal Society meeting in Newcastle on 3 November 1815, and the paper describing the lamp was formally presented on 9 November. For it, Davy was awarded the Society's Rumford Medal. (Davy's invention had been preceded by that of William Reid Clanny, an Irish doctor at Bishopwearmouth, who had also read a paper to the Royal Society in May 1813. Reid Clanny's lamp was successfully tested at Harrington Mill and he too won medals, from the Royal Society of Arts). The first trial of a Davy lamp with a wire sieve was at Hebburn Colliery on 9 January 1816.

Read more about Davy LampGas Detection, Accident Rate, Modern Lamps

Other articles related to "davy lamp, davy, lamp, lamps":

Davy Lamp - Modern Lamps
... A modern day equivalent of the Davy is the Protector Garforth GR6S flame safety lamp which is used for firedamp testing in all UK coal mines ... A modified version of this lamp is used to transport the Olympic Flame for the torch relays ... Lamps are still made in Eccles, Aberdare, south Wales, and in Kolkata, India ...
Oil Safety Lamps - Examples of Lamps - Davy Lamp
... In the Davy lamp a standard oil lamp is surrounded by fine wire gauze, the top being closed by a double layer or gauze ... At a draught of between 4 and 6 feet per second the lamp becomes unsafe ... At Wallsend in 1818 lamps were burning red hot (indicating significant firedamp) ...

Famous quotes containing the words lamp and/or davy:

    Men’s hearts are cold. They are indifferent. Not all the coal that is dug warms the world. It remains indifferent to the lives of those who risk their life and health down in the blackness of the earth; who crawl through dark, choking crevices with only a bit of lamp on their caps to light their silent way; whose backs are bent with toil, whose very bones ache, whose happiness is sleep, and whose peace is death.
    Mother Jones (1830–1930)

    The wealth and prosperity of the country are only the comeliness of the body, the fullness of the flesh and fat; but the spirit is independent of them; it requires only muscle, bone and nerve for the true exercise of its functions. We cannot lose our liberty, because we cannot cease to think.
    Humphry, Sir Davy (1778–1829)