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The miner was expected to return to the shaft, a round trip of up to a few miles, to relight an extinguished lamp. For men on piece work paid for what they produced, a relighting could cost them perhaps 10% of their day's pay, encouraging them to take the risk. Miners would also damage the mesh to make the lamp brighter. [21]
American Miners' Carbide Lamps: A Collectors Guide to American Carbide Mine Lighting. Westernlore Publications. ISBN 978-0870260643. Pohs, Henry (1995). The Miners Flame Light Book. Flame Publishing. ISBN 978-0964116504. Card, Peter W. (October 2004). Early Vehicle Lighting. Shire Publications. ISBN 978-0-7478-0585-4. Thorpe, Dave (2005).
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. [1] 1840 Mathieu Mueseler Exhibited The Museler Lamp in Belgium. [2] 1859 William Clark patented the first electrical mining lamp. [3] 1870s J.B.Marsaut (France) double gauze design [4]
A wheat lamp is a type of incandescent light designed for use in underground mining, named for inventor Grant Wheat and manufactured by Koehler Lighting Products in Wilkes-Barre, Pennsylvania, United States, a region known for extensive mining activity.
A type of Davy lamp with apertures for gauging flame height. The lamp consists of a wick lamp with the flame enclosed inside a mesh screen. 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.
Stephenson's design also allowed better light output as it used glass to surround the flame, which cut out less of the light than Davy's, where the gauze surrounded it. [8] But this also posed the danger of breakage in the harsh conditions of mineworking, a problem which was not resolved until the invention of safety glass .
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