safety lamp 
noun historical
A miner’s portable lamp with a flame protected, typically by wire gauze, to reduce the risk of explosion from ignited methane (firedamp). The first to be introduced, in the early 19th century, was the Davy lamp.The flame, which is transported in a structure similar to a miner's safety lamp while in flight, arrived earlier on Thursday at the coastal resort of Pathos, in the south-west. [emphasis added]...
- In 1815 he invented a safety lamp for use in coal-mines, after risking his life repeatedly in earlier tests.
- It is the miner's safety lamp carried by his father Roy during 46 years in the pit, before the perils of the job wrecked his health and eventually killed him.