Safety lamp, Crossley, no specific type, compressed air supply, from the Royal Commission on Accidents in Mines 1879-86, c.1880

This somewhat resembles Clanny's original lamp, in that it was supplied by air under pressure by pipes, etc.; it was patented by Mr. W. Crossley in 1880. There are two concentric glass cylinders, held by bolts, between the cap and a frame hinged to the reservoir. The feed air is taken by a flexible connection to taps and delivers into a space below the reservoir. Part of the air passes to a gauze -protected space below the flame and part between the glasses, to keep them cool. The outlet is through perforations unprotected by gauze. A padlock is fitted.