The term 'safety lamp' refers to a type of lamp invented by Sir Humphry DAVY in 1815. It was designed to reduce the risk of explosions in coal mines, as it was able to detect the presence of flammable gases such as methane and carbon monoxide. The lamp was made up of two separate chambers, one containing the flame and the other containing oxygen, which allowed the flame to burn without igniting any of the gases. The term 'DAVY' is an abbreviation of Sir Humphry DAVY's name, and is used to refer to the safety lamp he invented.