If
you would like to visit our very popular outdoor
lighting collection, please go to
Villa Outdoor Lighting section. |
 |
Davy Lamp
The Davy lamp is a candle containing
safety lamp. It was created for use in coal mines, allowing
deep seams to be mined despite the presence of methane
and other flammable gases, called firedamp or minedamp.
Davy had discovered that, to explode,
the gas must be heated to its ignition temperature and
that if such heating is prevented, combustion cannot
occur. If the flame in a lamp is surrounded by metal
gauze to distribute the heat over a large area, the
maximum temperature of the screen is below the ignition
temperature of the gas.
The lamp also provided a crude test
for the presence of gases. If inflammable gas mixtures
were present, the flame of the Davy lamp burned higher
with a blue tinge. Miners could also place a safety
lamp close to the ground to detect gases, such as carbon
dioxide, that are denser than air and so could collect
in depressions in the mine, if the mine air was oxygen-poor,
the lamp flame would be extinguished.
|
 |
|
Limited Time Offer
|
|
| |
| Act now and take an additional 20% off the
listed prices |
|
|
|
