safety lamp, Davy lamp(noun)
an oil lamp that will not ignite flammable gases (methane)
A miner's lamp designed to avoid explosion by enclosing the flame in fine wire gauze.
A safety lamp is any of several types of lamp that provides illumination in coal mines and is designed to operate in air that may contain coal dust or gases both of which are potentially flammable or explosive. Before the invention of the electric light around 1900, miners used flame lamps to provide illumination. Open flame lamps could ignite flammable gases which collected in mines, causing explosions and so safety lamps were developed to enclose the flame and prevent it from igniting the surrounding atmosphere. Flame safety lamps have been replaced in mining with sealed explosion-proof electric lights.
The Nuttall Encyclopedia
name of a variety of lamps for safety in coal-mines against "fire-damp," a highly explosive mixture of natural gas apt to accumulate in them; the best known being the "Davey Lamp," invented by Sir Humphrey Davy; the "Geordie," invented by George Stephenson, both of which, however, have been superseded by the Gray, Muesler, Marsant, and other lamps; all are constructed on the principle discovered by Davy and Stephenson, that a flame enveloped in wire gauze of a certain fineness does not ignite "fire-damp." Saffi
The numerical value of safety lamp in Chaldean Numerology is: 2
The numerical value of safety lamp in Pythagorean Numerology is: 1
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